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                                    SUBLEASE

     THIS SUBLEASE ("Sublease") is made as of July 22, 1999, by ADC Wireless
Systems, Inc., a Minnesota corporation ("Sublandlord"), and MP3.com, Inc., a
Delaware corporation ("Subtenant").

     BACKGROUND:

     A. Spieker Properties, L.P., a California limited partnership, as Landlord
("Prime Landlord"), and Sublandlord, as Tenant, entered into an Industrial Net
Lease dated February 25, 1998 (the "Prime Lease"), regarding certain premises
consisting of approximately 60,900 square feet of space (the "Premises") in the
building known as Bridge Pointe Corporate Centre, Phase I, located within the
Eastgate Technology Park at 4790 Eastgate Mall in San Diego, California, all as
described in the Prime Lease. A copy of the Prime Lease is attached hereto as
Exhibit A.

     B. Sublandlord and Subtenant wish to enter into a sublease for the
Premises, including all appurtenances attached thereto, upon the terms and
conditions set forth below.

     AGREEMENTS:

     1.   SUBLEASE. Subtenant agrees to sublease from Sublandlord, and
Sublandlord agrees to sublease to Subtenant, the Premises upon the terms and
conditions set forth below, together with the 216 unreserved parking spaces
leased to Sublandlord pursuant to the Prime Lease.

     2.   SUBLEASE TERM. The term of this Sublease ("Sublease Term") will
commence on August 1, 1999 ("Commencement Date") and will expire on July 31,
2005. Sublandlord shall not be subject to any liability to Subtenant for delay
in obtaining the Prime Landlord's Consent so long as Sublandlord has used
diligent efforts to obtain timely consent from Prime Landlord, nor shall such
delay affect the validity of this Sublease, the obligations of Subtenant
hereunder or affect the Expiration Date or extend the Term hereof, but in such
case, Subtenant shall not be obligated to pay Rent or perform any other
obligation of Subtenant under the terms of this Sublease until (1) Sublandlord's
complete vacancy of the Building (including removal of all personal property and
Building signage); and (2) receipt of the Prime Landlord's Consent. If the
Commencement Date is delayed beyond August 6, 1999 due to a delay in
Sublandlord's complete vacancy of the Premises, Sublandlord shall pay to
Subtenant $2,000.00, on a per diem basis, for each day that the complete vacancy
of the Premises occurs after August 6, 1999. Sublandlord and Subtenant will
cooperate in good faith to identify and hire a contractor reasonably acceptable
to both parties to remove Sublandlord's signage and install Subtenant's signage,
provided that the cost for signage removal and installation will be billed
separately to Sublandlord and Subtenant, with Sublandlord paying for signage
removal and Subtenant paying for signage installation.

     3.   USE; TRANSFERRED PERSONAL PROPERTY. Subtenant shall use the Premises
only for administrative office, laboratory and warehouse purposes and uses
incidental thereto, and any other uses approved by Prime Landlord. Sublandlord
also hereby conveys to Subtenant, for good and valuable consideration, all of
Sublandlord's right, title and interest in and to the personal property listed
on Exhibit B attached hereto which is located within the Premises (the
"Transferred Property"). Subtenant shall remove the same from the Premises if
required by the terms of the Prime Lease on expiration of Sublease Term.

     4.   CONDITION OF PREMISES. Sublandlord shall deliver possession of the
Premises to Subtenant on the Commencement Date, broom-clean with all personal
property removed but otherwise in their "as-is" condition and with all faults,
excepting only that Sublandlord shall warrant that all building systems
(including without limitation, the HVAC equipment) shall be in good operating
order and condition upon delivery of the Premises to Subtenant subject to Prime
Landlord's maintenance and repair obligations under Section 10 of the Prime
Lease. Subtenant shall have access to the Premises commencing at 8:00 a.m. On
July 24, 1999 for moving and installation of Subtenant's equipment, fixtures and
other personal property. Sublandlord shall repair all damage to the Premises and
the Building and the exterior of the Building caused by Sublandlord's removal of
the signage and Sublandlord's property.

                                       1.
<PAGE>   2

     5.   ALTERATIONS. Subtenant shall not make or cause to be made any
alterations, additions or improvements to the Premises (or any changes to the
Improvements) without both (a) the prior written consent of Sublandlord, which
consent shall not be unreasonably withheld, delayed or conditioned and (b) the
prior written consent of Prime Landlord; provided, however, that Subtenant shall
be permitted to make or cause to be made any changes to the Premises without
Sublandlord's prior written consent if (a) such alterations, additions or
improvements to the Premises are permitted to be made by Sublandlord under
Section 12 of the Prime Lease without the prior written consent of Prime
Landlord, or (b) such alterations, additions or improvements to the Premises are
in accordance with the design specifications provided to Sublandlord prior to
the date hereof. If Subtenant obtains the written consent of Sublandlord to a
proposed alteration, Subtenant shall also obtain Prime Landlord's approval (at
Subtenant's sole expense) for any alterations made or contractor services used
in the Premises in accordance with the provisions of the Prime Lease, and, as
part of such consent, Subtenant shall also obtain Prime Landlord's written
notice regarding whether removal of such alterations will be required by Prime
Landlord as part of the surrender obligations under the Prime Lease, as provided
in Section 12 of the Prime Lease. In the event Subtenant requests Sublandlord's
consent to any alterations, additions or improvements to the Premises,
Sublandlord shall notify Subtenant within 10 days after receipt of Subtenant's
notice as to whether Sublandlord consents to the alterations, additions or
improvements to the Premises. Failure of Sublandlord to respond within such 10
day period shall be deemed a consent to such alterations, additions or
improvements to the Premises. Sublandlord shall not object to any proposed
alterations, additions or improvements to the Premises on the basis of aesthetic
considerations provided that such alterations, additions or improvements to the
Premises otherwise comply with all requirements regarding alterations contained
in the Prime Lease.

     6.   RENT. Subtenant will pay monthly base rent for the Premises ("Base
Rent") in advance, without abatement, deduction or setoff, commencing on the
Commencement Date and on the first day of each calendar month thereafter during
the Sublease Term, in an amount equal to Seventy-Six Thousand One Hundred
Twenty-Five Dollars ($76,125.00). Subtenant will also pay, as additional rent,
Subtenant's Proportionate Share (as defined below) of all other payments due the
Prime Landlord under the Prime Lease, including, without limitation, Operating
Expenses (as defined in the Prime Lease), as and when they shall become due
under the Prime Lease. For purposes of this Sublease, "Rent" shall mean Base
Rent and additional rent, and "Subtenant's Proportionate Share" shall mean
Tenant's Proportionate Share as defined in the Prime Lease. Subtenant will pay
Sublandlord Base Rent and additional rent for the first month of the Sublease
Term, upon mutual execution of this Sublease.

     Commencing on August 1, 2000, and on August 1 of each year thereafter
during the Sublease Term, Base Rent shall increase annually by four percent (4%)
over the Base Rent in effect immediately prior to such increase.

     7.   SECURITY DEPOSIT. Subtenant shall, upon mutual execution of this
Sublease, deposit with Sublandlord the sum of Seventy-Six Thousand One Hundred
Twenty-Five Dollars ($76,125.00) as security for the full performance of every
provision of this Sublease to be performed by Subtenant. If Subtenant defaults
with respect to any provision of this Sublease, Sublandlord may use, apply or
retain all or any part of this security deposit (or any additional security as
hereinafter required) for the payment of any base rent, additional rent or any
other sum in default, or for the payment of any other amount which Sublandlord
may spend or become obligated to spend by reason of Subtenant's default, or to
compensate Sublandlord for any other loss, cost or damage which Sublandlord may
suffer by reason of Subtenant's default. If any portion of said deposit or
additional security is so used or applied, Subtenant shall, within ten (10) days
after written demand therefor, deposit cash with Sublandlord in an amount
sufficient to restore the security deposit to its original amount and
Subtenant's failure to do so shall be a breach of this Sublease. Sublandlord
shall not, unless otherwise required by law, be required to keep this security
deposit (or any additional security as hereinafter required) separate from its
general funds nor pay interest to its Subtenant. If Subtenant defaults with
respect to any provision of this Sublease more than twice in any calendar year,
Subtenant shall, as additional security for Subtenant's performance of this
Sublease and within ten (10) days after written demand therefor, deposit cash
with Sublandlord equal to twice the monthly Base Rent in effect for the month in
which Subtenant's third default occurred.

                                       2.
<PAGE>   3

     8.   PRIME LEASE. This Sublease shall be subject and subordinate to all of
the terms and provisions of the Prime Lease. Except for payments of Rent and
Operating Expenses under Sections 6 and 7 of the Prime Lease (which payments
shall be made by Sublandlord), and, except as otherwise provided herein,
Subtenant hereby agrees to perform for Sublandlord's benefit, during the term of
this Sublease, all of Sublandlord's obligations under the Prime Lease but only
to the extent they accrue during the term of this Sublease. Sublandlord shall
not exercise its option to renew the Prime Lease contained in Section 38
thereof. Sublandlord shall reasonably cooperate with Subtenant to obtain Prime
Landlord's consent to Subtenant's continued use and occupancy of the Premises
after the expiration of the Sublease Term, provided that such use and occupancy
shall be pursuant to a direct lease between Subtenant and Prime Landlord.

     9.   INCORPORATION OF PRIME LEASE.

          (a)  Except as otherwise provided in this Sublease, all of the terms
and provisions of the Prime Lease are incorporated into and made a part of this
Sublease, and the rights and obligations of the parties under the Prime Lease
are hereby imposed upon the parties hereto with respect to the Sublease
Premises, the Sublandlord being substituted for the Landlord in the Prime Lease,
the Subtenant being substituted for the Tenant in the Prime Lease.

          (b)  Notwithstanding the foregoing:

               (i)  the following Sections of the Prime Lease are not
incorporated herein: Basic Lease Information (Lease Date, Tenant, Tenant's
Notice Address, Tenant's Billing Address Tenant Contact, Landlord, Address of
Landlord, Scheduled Term Commencement Date, Length of Term, Estimated First Year
Operating Expenses, Rent, Security Deposit) 2, 3, 19, 20, 38, and Exhibits B, D
and F.

               (ii) Each of the parties hereto shall fully perform all of their
respective obligations hereunder, and shall indemnify, defend, protect, and hold
harmless the other party from any and all liability, damages, liabilities,
claims proceedings, actions, demands and costs (including reasonable attorneys'
fees) resulting, directly or indirectly, from their failure to perform their
respective obligations.

               (iii) Upon any termination of the Prime Lease, this Sublease
shall also terminate. If Prime Landlord seeks to terminate the Prime Lease
because of a default or alleged default by Sublandlord under the Prime Lease
(other than a default or alleged default caused by the default by Subtenant
under this Sublease), Sublandlord shall take all action required to reinstate
the Prime Lease. Further, if Rent is abated under the Prime Lease, Rent
hereunder shall also be abated in the same proportion.

               (iv) Subtenant shall indemnify, defend, protect, and hold
Sublandlord harmless from and against all actions, claims, demands, costs,
liabilities, losses, reasonable attorneys' fees, damages, penalties, and
expenses (collectively "Claims") which may be brought or made against
Sublandlord or which Sublandlord may pay or incur to the extent caused by (A) a
breach of this Sublease by Subtenant, (B) any violation of law by Subtenant or
its employees, agents, contractors or invitees ("Agents") relating to the use or
occupancy of the Sublease Premises, (C) the negligence or willful misconduct of
Subtenant or its Agents, or (D) Subtenant's use or occupancy of the Premises.
Sublandlord shall indemnify, defend, protect, and hold Subtenant harmless from
and against all actions, claims, demands, costs, liabilities, losses, reasonable
attorneys' fees, damages, penalties and expenses which may be brought or made
against Subtenant or which Subtenant may pay or incur to the extent caused by
(A) the negligence or willful misconduct of Sublandlord or its Agents occurring
on or about the Premises, (B) the failure by Sublandlord to comply with or
perform its obligations under the Prime Lease and/or this Sublease (before or
after the Commencement Date), (C) a breach by Sublandlord of any of its
representations or warranties to Subtenant under this Sublease, or (D)
Sublandlord's use or occupancy of the Premises.

               (v)  Sublandlord represents to Subtenant that (A) the Prime Lease
is in full force and effect, (B) the copy of the Prime Lease which is attached
to this Sublease as EXHIBIT A is a true, correct and complete copy of the Prime
Lease, (C) to Sublandlord's actual knowledge, no default exists on the part of
Sublandlord, or has there occurred any event which, with the giving of notice or
passage of time or both, could constitute such a default or event of

                                       3.
<PAGE>   4

default, and (D) to Sublandlord's actual knowledge, there are no pending or
threatened actions, suits or proceedings before any court or administrative
agency against Sublandlord which could, in the aggregate, adversely affect the
Premises or of Sublandlord to perform its obligations under the Sublease, and
Sublandlord is not aware of any facts which might result in any actions, suits
or proceedings.

               (vi) The provisions and obligations of the foregoing Section
7(b)(ii) and (v) shall survive the termination of this Sublease.

     10.  SUBTENANT'S RIGHTS AS TO PRIME LANDLORD. Sublandlord shall not be
liable for any nonperformance of or noncompliance with or breach or failure to
observe any term, covenant or condition of the Prime Lease upon Prime Landlord's
part to be kept, observed, performed or complied with, or for any delay or
interruption in Prime Landlord's performing its obligations thereunder, provided
that Sublandlord shall cooperate with Subtenant in assisting Subtenant in
enforcing the terms of the Prime Lease, to the extent provided below.
Sublandlord assigns unto Subtenant, for so long as this Sublease shall be in
force and effect, any and all assignable rights and causes of action which
Sublandlord may have against Prime Landlord with respect to the Premises due to
defaults by Prime Landlord under the Prime Lease. Sublandlord will cooperate
with and join with Subtenant in any claims or suits brought by Subtenant against
Prime Landlord under the Prime Lease, provided that such participation shall be
without cost or expense to Sublandlord.

     11.  INSURANCE . Subtenant will, during the Sublease Term, continuously
maintain commercial general liability insurance as required under the Prime
Lease, which insurance policy shall name Sublandlord as an additional insured
party, and a certificate thereof acceptable to Sublandlord shall be delivered to
Sublandlord prior to the delivery of the Premises to Subtenant.

     12.  ASSIGNMENT AND SUBLETTING. Subtenant may not, without the prior
written consent of Sublandlord (which consent shall not be unreasonably
withheld), assign or pledge this Sublease, sublet all or any part of the
Premises, allow any liens to be placed on this Sublease or the Premises, or
suffer this Sublease or the Premises or any portion thereof to be attached or
taken upon execution. Sublandlord may assign its interest under this Sublease at
any time, and in such case Sublandlord shall be released from any liability
arising under this Sublease after the effective date of such assignment.

     13.  TERMINATION. This Sublease shall terminate at the end of the Sublease
Term hereof. Subtenant will peacefully and quietly vacate and surrender the
Premises to Sublandlord at the expiration of the Sublease Term, in the condition
called for under the Prime Lease, provided that Subtenant shall not be required
to remove or replace any alterations or improvements that were constructed prior
to the Sublease Term. The existence of this Sublease is dependent and
conditioned upon the continued existence of the Prime Lease, and in the event of
the cancellation or termination of the Prime Lease, this Sublease automatically
shall be terminated; provided, however, that this provision shall not be deemed
to release Sublandlord of liability if the Prime Lease is canceled or terminated
due to a default by Sublandlord as Tenant under the Prime Lease, which default
did not result, in whole or in part, from a default by Subtenant under this
Sublease. Sublandlord will not amend, alter or modify any of the provisions of
the Prime Lease affecting Subtenant, or surrender the Prime Lease, without
Subtenant's consent, which consent may be granted or withheld in Subtenant's
sole discretion. Sublandlord shall have no liability to Subtenant due to the
termination of the Prime Lease by reason of any default by Subtenant under this
Sublease, or by reason of any condemnation or destruction of the Premises. If,
without the fault of Sublandlord hereunder the Prime Lease should terminate
prior to the expiration of this Sublease, Sublandlord shall have no liability to
Subtenant. To the extent that the Prime Lease grants Sublandlord any
discretionary right to terminate the Prime Lease, whether due to casualty,
condemnation, or otherwise, Sublandlord shall not exercise such right without
the prior written consent of the Subtenant which consent may be granted or
withheld in Subtenant's sole discretion.

     14.  QUIET ENJOYMENT; SUBLANDLORD DEFAULTS. Subtenant shall peacefully
have, hold and enjoy the Subleased Premises, subject to the terms and conditions
of this Sublease and subject to the Prime Lease, provided that Subtenant pays
all rent and performs all of Subtenant's covenants and agreements contained
herein. In the event, however, that Sublandlord defaults in

                                       4.
<PAGE>   5

the performance or observance of any of Sublandlord's obligations under this
Sublease or receives a notice of default from Prime Landlord under the Prime
Lease, then Subtenant shall give written notice to Sublandlord specifying in
what manner Sublandlord has defaulted. If such default shall not be cured within
a reasonable time, but in no event later than thirty (30) days after
Sublandlord's receipt of such written notice from Subtenant (except that if such
default cannot be cured within said thirty (30) day period, this period shall be
extended for an additional reasonable time, provided that Sublandlord commences
to cure such default within such thirty (30) day period and proceeds diligently
thereafter to effect such cure as quickly as possible), then Subtenant shall be
entitled, at Subtenant's option, to cure such default and promptly collect from
Sublandlord Subtenant's reasonable expenses in so doing (including, without
limitation, reasonable attorneys' fees and court costs) unless such default by
Sublandlord is caused by a default of Subtenant hereunder (in which case
Sublandlord shall not be liable for Subtenant's costs to cure the default).
Subtenant shall not be required to wait the entire cure period provided for
herein if earlier action is required to prevent a termination by Prime Landlord
of the Prime Lease and Sublandlord has failed to take such earlier action.

     15.  SUBTENANT DEFAULTS. If Subtenant defaults in its obligations under
this Sublease, Sublandlord shall have all of the same rights and remedies
against Subtenant as would be available to the Prime Landlord against
Sublandlord if Sublandlord were in default under the Prime Lease, as fully as if
such rights and remedies were set forth in this Sublease.

     16.  NOTICES. Any notice or demand permitted or required hereunder shall be
deemed given or made if, and shall not be deemed to have been given or made
unless, it is in writing and deposited in the United States mails certified,
return receipt requested, postage prepaid, addressed as follows:

     If to Sublandlord: ADC Wireless Systems, Inc.
                        c/o ADC Telecommunications, Inc.
                        12501 Whitewater Drive
                        Minnetonka, MN  55343
                        Attention:  General Counsel

     If to Subtenant: MP3.com, Inc.
                      10350 Science Center Drive
                      San Diego, CA  92121
                      Attention:  Steven M. Przesmicki

The foregoing addresses may be changed from time to time by notice as above
provided, which change shall be effective ten (10) days after notice is given.

     17.  ENTIRE AGREEMENT. This Sublease contains the entire agreement between
Sublandlord and Subtenant regarding the Premises. Subtenant has not relied on
any statement, representation or warranty of any person except as set out in
this Sublease. This Sublease may be modified only by an agreement in writing
signed by Sublandlord and Subtenant. No surrender of the Premises, or of the
remainder of the Sublease Term, will be valid unless accepted by Sublandlord in
writing.

     18.  SUCCESSORS AND ASSIGNS. All provisions of this Sublease will be
binding on and for the benefit of the successors and assigns of Sublandlord and
Subtenant, except that no person or entity holding under or through Subtenant in
violation of any provision of this Sublease will have any right or interest in
this Sublease or the Premises.

     19.  PRIME LANDLORD CONSENT. This Sublease, including and the obligations
of Sublandlord and Subtenant hereunder, is contingent upon the written consent
of the Prime Landlord to the terms hereof, which consent shall be substantially
in the form attached hereto as Exhibit D. If such consent has not been obtained
by Sublandlord within thirty (30) days after the date of Sublandlord's execution
of this Sublease, Subtenant may, within ten (10) days thereafter, terminate this
Sublease by written notice to Sublandlord whereupon Sublandlord shall return to
Subtenant all sums paid by Subtenant to Sublandlord in connection with its
execution of this Sublease. Sublandlord shall use commercially reasonable
efforts to obtain Prime Landlord's consent to this Sublease as soon as
practicable.

                                       5.
<PAGE>   6

     20.  USE OF PERSONAL PROPERTY. Sublandlord leases certain modular furniture
(the "Leased Property") from Steelcase Financial Services, Inc., a Michigan
corporation ("Steelcase"), pursuant to a Prime Lease Agreement dated July 13,
1998 (the "Personal Property Lease"), a copy of which is attached hereto as
Exhibit C. Sublandlord assigns to Subtenant, and Subtenant assumes from
Sublandlord, effective as of four months after the Commencement Date ("Personal
Property Assumption Date"), Sublandlord's obligations under the Personal
Property Lease. Commencing on the Personal Property Assumption Date, Subtenant
will perform all obligations of the Personal Property Lease and shall pay
directly to Steelcase the monthly rental payments of $17,946.80 as and when such
payments are due under the Personal Property Lease. Notwithstanding the
foregoing, Sublandlord and Subtenant will use commercially reasonable efforts to
obtain a contract for Subtenant's lease of the Leased Property directly with
Steelcase on or before December 1, 1999. If Steelcase refuses to execute such an
agreement, or if Steelcase prohibits assignment of the Personal Property Lease
to Subtenant, then Subtenant shall continue to make monthly rental payments from
and after the Personal Property Assumption Date in the amount of $17,946.80 to
Steelcase, as and when the same become due and payable under the Personal
Property Lease (or, in the alternative if requested by Sublandlord, Subtenant
will make such payments directly to Sublandlord together with Subtenant's
payment of monthly rent) throughout the Sublease Term. Sublandlord will pay
throughout the Sublease term all amounts owed to Steelcase for the lease of the
carpet in the Premises as and when the same become due and payable.

     21.  SIGNAGE. Subtenant, at Subtenant's sole cost and expense, shall have
the right to install signage on the Building, subject to the requirements of the
Prime Lease.

     22.  COUNTERPARTS. This Sublease may be signed in any number of
counterparts, each when taken together shall constitute an original agreement.

     23.  MUTUAL WAIVER OF SUBROGATION. The waiver of subrogation provision set
forth in Section 9 of the Prime Lease shall be deemed a three party agreement
binding among and inuring to the benefit of Sublandlord, Subtenant and Prime
Landlord (by reason of its consent to hereto).

     24.  CASUALTY.

          (a)  TERMINATION OF PRIME LEASE. If the Premises is damaged or
destroyed and Prime Landlord exercises any option to terminate the Prime Lease,
if any, this Sublease shall terminate as of the date of the termination of the
Prime Lease. So long as Subtenant is not in default under this Sublease beyond
the applicable notice and cure period for such default on the date of such
damage or destruction, Subtenant shall have the same rights of termination under
this Sublease as Sublandlord may have to terminate the Prime Lease upon an event
of damage or destruction under the Prime Lease, and Sublandlord shall not
exercise any such rights of termination without the prior written consent of
Subtenant. In the event Subtenant is in default under this Sublease beyond the
applicable notice and cure period for such default on the date of such damage or
destruction, then Sublandlord shall have the right to exercise any termination
right granted to Sublandlord under subparagraph 24 of the Prime Lease without
Subtenant's consent.

          (b)  CONTINUATION OF SUBLEASE. If the Prime Lease is not terminated
following any damage or destruction as provided above, this Sublease shall
remain in full force and effect; provided, however, that (i) Sublandlord shall
act with reasonable diligence to enforce any obligation of Prime Landlord to
rebuild the Premises in accordance with the Prime Lease, if such rebuilding is
authorized under the Prime Lease, and (ii) Subtenant shall be entitled to
abatement of Rent under this Sublease to the extent that Sublandlord's Rent is
abated under the Prime Lease.

     25.  CONDEMNATION.

          (a)  TOTAL CONDEMNATION. If all of the Premises are condemned by
eminent domain, inversely condemned or sold in lieu of condemnation, for any
public or a quasi-public use or purpose ("Condemned" or "Condemnation"), this
Sublease shall terminate as of the date of title vesting in such proceeding, and
Rent shall be adjusted to the date of termination.
                                       6.
<PAGE>   7

          (b)  PARTIAL CONDEMNATION. If any portion of the Premises is
Condemned, and Prime Landlord exercises any option to terminate the Prime Lease,
this Sublease shall automatically terminate as of the date of the termination of
the Prime Lease.

          (c)  SUBTENANT'S AWARD. Subject to the provisions of the Prime Lease,
Subtenant shall have the right to recover from the condemning authority, such
compensation as may be separately awarded to Subtenant in connection with such
Condemnation proceedings, as permitted under Section 23 of the Prime Lease, but
not otherwise.

     26.  BROKERS. Each party warrants and represents that it has had no
dealings with any real estate broker, agent or finder, other than Cushman Realty
or Colliers International (the "Brokers"), in connection with the negotiation of
this Sublease, and that it knows of no other real estate broker or agent who is
entitled to any commission or finder's fee in connection with the Premises or
this Sublease. Sublandlord shall pay any real estate brokerage fees arising from
this Sublease, in accordance with a separate written agreement with the Brokers
which Sublessor warrants and represents to Sublessee has been entered into by
Sublessor and Brokers as of the date hereof. Each party shall indemnify and hold
the other harmless from and against any and all claims, demands, losses,
liabilities, lawsuits, judgments, costs and expenses (including without
limitation, attorneys' fees and costs) arising from any claim for a leasing
commission or equivalent compensation alleged to be owing on account of the
indemnifying party's dealings with any real estate broker or agent other than
the Brokers in connection with the Premises or this Sublease.

     EXECUTION:

     Sublandlord and Subtenant have executed this Sublease as of the date first
stated above.

                                        SUBLANDLORD:

                                        ADC Wireless Systems, Inc.

                                        By
                                           -------------------------------------
                                           Its
                                              ----------------------------------

                                       7.
<PAGE>   8

                                        SUBTENANT:

                                        MP3.com, Inc.

                                        By
                                           -------------------------------------
                                           Its
                                              ----------------------------------

                                       8.
<PAGE>   9

                                    EXHIBIT A

                                   Prime Lease




                                       1.
<PAGE>   10

                                    EXHIBIT B

                              Transferred Property




                                       1.
<PAGE>   11

                                    EXHIBIT C

                             Personal Property Lease




                                       1.
<PAGE>   12

                                    EXHIBIT D

                           Prime Landlord Consent Form

                          CONSENT TO SUBLEASE AGREEMENT

     This Consent to Sublease Agreement (this "AGREEMENT") is made as of July
22, 1999 by and among Spieker Properties, L.P., a California limited partnership
("MASTER LANDLORD"), ADC Wireless Systems, Inc., a Minnesota corporation
("SUBLANDLORD"), and MP3.com, Inc., a Delaware corporation ("SUBTENANT").

                                    RECITALS

         This Agreement is made with regard to the following facts:

     A.   Master Landlord and Sublandlord, as tenant, entered into a Lease dated
February 25, 1998, (the "MASTER LEASE"), for premises located at 4790 Eastgate
Mall (the "PREMISES") in the office building commonly known as BRIDGE POINTE
CORPORATE CENTRE, PHASE I (the "BUILDING"). Initially capitalized terms not
otherwise defined herein shall have the same meanings as described in the Lease.

     B.   Under the terms of Paragraph 21 of the Master Lease, Sublandlord has
requested Master Landlord's consent to the Sublease Agreement dated July 22,
between Sublandlord and Subtenant ( the "SUBLEASE"), which would sublease to
Subtenant the Premises, as more particular described in the Sublease (the
"SUBLEASED PREMISES"). A copy of the Sublease is attached to this Agreement as
EXHIBIT A.

     C.   Master Landlord is willing to consent to the Sublease on the terms and
conditions contained in this Agreement.

     NOW THEREFORE, in consideration of the mutual covenants contained in this
Agreement, and for valuable consideration, the receipt and sufficiency of which
are acknowledged by the parties, the parties agree as follows.

          1.   MASTER LANDLORD'S CONSENT. Master Landlord consents to the
Sublease. This consent is granted only on the terms and conditions stated in
this Agreement. Master Landlord is not bound by any of the terms, covenants, or
conditions of the Sublease. The Sublease is subject and subordinate to the
Master Lease.

          2.   LIMITS OF CONSENT.

               2.1  NONRELEASE OF SUBLANDLORD; FURTHER TRANSFERS; RECAPTURE
RIGHTS. Neither the Sublease nor this Agreement will:

                    (a)  release Sublandlord from any liability, whether past,
present or future, under the Master Lease;

                    (b)  alter the primary liability of Sublandlord to pay the
Rent and perform all of Tenant's obligations under the Master Lease (including
the payment of all bills rendered by Master Landlord for charges incurred by
Subtenant for services and materials supplied to the Subleased Premises);

                    (c)  be construed as a waiver of Master Landlord's right to
                         consent to any proposed transfer after the date hereof
by Sublandlord under the Master Lease or Subtenant under the Sublease, or as a
consent to any portion of the Subleased Premises being used or occupied by any
other party; or

                    (d)  limit Master Landlord's right, in the event of a
proposed future sublease, to recapture any portion of the Premises, including
the Subleased Premises, affected by that proposed sublease, as provided in
Paragraph 21 of the Master Lease.

                                       1.
<PAGE>   13

               Master Landlord may consent to the subsequent sublease and
assignment of the Sublease or any amendments or modifications to the Sublease
without notifying Sublandlord or anyone else liable under the Master Lease,
including any guarantor of the Master Lease, and without obtaining their
consent. No such action by Master Landlord will relieve those persons from any
liability to Master Landlord or otherwise with regard to the Subleased Premises.
Notwithstanding the foregoing, nothing contained herein shall diminish any
obligation of Subtenant to obtain Sublandlord's approval prior to taking any
such actions.

          3.   RELATIONSHIP WITH MASTER LANDLORD

               3.1  EFFECT OF SUBLANDLORD DEFAULT UNDER MASTER LEASE. If
Sublandlord defaults in the performance of its obligations under the Master
Lease, Master Landlord may, without limiting its other rights and remedies, by
notice to Sublandlord and Subtenant, elect to receive and collect, directly from
Subtenant, all rent and any other sums owing and to be owed under the Sublease,
as further set forth in Section 3.2 below.

               3.2  MASTER LANDLORD'S ELECTION TO RECEIVE RENTS. Master Landlord
will not, as a result of the Sublease, or as a result of the collection of rents
or any other sums from Subtenant under Section 3.1 above, be liable to Subtenant
for any failure of Sublandlord to perform any obligation of Sublandlord under
the Sublease.

               Sublandlord irrevocably authorizes and directs Subtenant, on
receipt of any written notice from Master Landlord stating that a default exists
in the performance of Sublandlord's obligations under the Master Lease, to pay
to Master Landlord the rents and any other sums due and to become due under the
Sublease. Sublandlord agrees that Subtenant has the right to rely on any such
statement from Master Landlord, and that Subtenant will pay those rents and
other sums to Master Landlord without any obligation or right to inquire as to
whether a default exists and despite any notice or claim from Sublandlord to the
contrary. Sublandlord will not have any right or claim against Subtenant for
those rents or other sums paid by Subtenant to Master Landlord. Master Landlord
will credit Sublandlord with any rent received by Master Landlord under this
assignment, but the acceptance of any payment on account of rent from Subtenant
as the result of a default by Sublandlord will not: (a) be an attornment by
Master Landlord to Subtenant or by Subtenant to Master Landlord; (b) be a waiver
by Master Landlord of any provision of the Master Lease; or (c) release
Sublandlord from any liability under the terms, agreements, or conditions of the
Master Lease. No payment of rent by Subtenant directly to Master Landlord,
regardless of the circumstances or reasons for that payment, will be deemed an
attornment by Subtenant to Master Landlord in the absence of a specific written
agreement signed by Master Landlord to that effect.

               3.3  MASTER LANDLORD'S ELECTION OF TENANT'S ATTORNMENT. In the
event the Master Lease is terminated prior to the expiration of the term of the
Sublease, Master Landlord shall have the right, pursuant to notice to Subtenant,
to succeed to Sublandlord's interest in the Sublease and cause Subtenant to
attorn to Master Landlord. Furthermore, Master Landlord shall recognize
Subtenant's right to possession of the Premises as provided for in the Sublease
and shall not disturb Subtenant's right to possession of the Premises so long as
an event of default does not exist in the performance of Subtenant's obligations
under the Sublease. Master Landlord will assume the obligation of Sublandlord
under the Sublease from the time of the exercise of the option, but Master
Landlord will not be:

                    (a)  liable for any rent paid by Subtenant to Sublandlord
more than one month in advance, or any security deposit paid by Subtenant to
Sublandlord;

                    (b)  liable for any act or omission of Sublandlord under the
Master Lease or for any default of Sublandlord under the Sublease which occurred
prior to the Master Landlord's assumption;

                    (c)  subject to any defenses or offsets that Subtenant may
have against Sublandlord which arose prior to Master Landlord's assumption; or

                    (d)  bound by any changes or modifications made to the
Sublease without the written consent of Master Landlord.

                                       2.
<PAGE>   14

          4.   CONSIDERATION FOR SUBLEASE. Sublandlord and Subtenant represent
and warrant that there are no additional payments of rent or any other
consideration of any type which has been paid or is payable by Subtenant to
Sublandlord in connection with the Sublease, other than as disclosed in the
Sublease.

          5.   GENERAL PROVISIONS

               5.1  BROKERAGE COMMISSION. Sublandlord and Subtenant agree that
Master Landlord will not be liable for any brokerage commission or finder's fee
in connection with the consummation of the Sublease or this Agreement.
Sublandlord and Subtenant will protect, defend, indemnify, and hold Master
Landlord harmless from any brokerage commission or finder's fee in connection
with the consummation of the Sublease or this Agreement, and from any cost or
expense (including attorney fees) incurred by Master Landlord in resisting any
claim for any such brokerage commission or finder's fee. The provisions of this
Section 5.1 shall survive the expiration or earlier termination of the Sublease
and this Agreement.

               5.2  NOTICE. Any notice that may or must be given by any party
under this Agreement will be delivered (i) personally, (ii) by certified mail,
return receipt requested, or (iii) by a nationally recognized overnight courier,
addressed to the party to whom it is intended. Any notice given to the Master
Landlord, Sublandlord or Subtenant shall be sent to the respective address set
forth on the signature page below, or to such other address as that party may
designate for service of notice by a notice given in accordance with the
provisions of this Section 5.2.

               5.3  CONTROLLING LAW. The terms and provisions of this Agreement
will be construed in accordance with, and will be governed by, the laws of the
State of California.

               5.4  ENTIRE AGREEMENT; WAIVER. This Agreement constitutes the
final, complete and exclusive statement between the parties to this Agreement
pertaining to the terms of Master Landlord's consent to the Sublease, supersedes
all prior and contemporaneous understandings or agreements of the parties, and
is binding on and inures to the benefit of their respective heirs,
representatives, successors and assigns.

               5.5  WAIVER OF JURY TRIAL; ATTORNEY FEES. If any party commences
litigation against any other party for the specific performance of this
Agreement, for damages for the breach hereof or otherwise for enforcement of any
remedy hereunder, the parties waive any right to a trial by jury and, in the
event of any commencement of litigation, the prevailing party shall be entitled
to recover from the applicable party such costs and reasonable attorney fees as
may have been incurred.

               5.6  SIGNAGE. Sublandlord's signage rights as outlined in
Paragraph 13 of the Master Lease are hereby assigned to Subtenant.

                                       3.
<PAGE>   15

     The parties have executed this Consent to Sublease Agreement as of the
above date.

MASTER LANDLORD:

SPIEKER PROPERTIES, L.P.,               Master Landlord Address:
a California limited partnership

                                        9255 Towne Centre Drive, Suite 100
By: Spieker Properties, Inc.,           San Diego, CA 92121
    a Maryland corporation,
    its general partner


-----------------------------------
By: Richard L. Romney
Its: Senior Vice President


SUBLANDLORD:

ADC Wireless Systems, Inc.,             Sublandlord Address:
a Minnesota corporation

                                        P.O. Box 1101
                                        Minneapolis, MN 55440-1101

     By:
        -------------------------------
     Its:
         ------------------------------


     By:
        -------------------------------
     Its:
         ------------------------------


SUBTENANT:

MP3.com,                                Subtenant Address:
a Delaware corporation

                                        ----------------------------------------

                                        ----------------------------------------

                                        ----------------------------------------
---------------------------------------
By: Michael Robertson
Its:

                                       4.
<PAGE>   16

                                    EXHIBIT A

                                    SUBLEASE




                                       5.

<PAGE>   17

                              INDUSTRIAL NET LEASE


                                       FOR


                         BRIDGE POINTE CORPORATE CENTRE
                              SAN DIEGO, CALIFORNIA




                                 BY AND BETWEEN


                            SPIEKER PROPERTIES, L.P.
                        A CALIFORNIA LIMITED PARTNERSHIP


                                   AS LANDLORD




                                       AND

                           ADC WIRELESS SYSTEMS, INC.,
                            A MINNESOTA CORPORATION,
                          A WHOLLY OWNED SUBSIDIARY OF
              ADC TELECOMMUNICATIONS, INC., A MINNESOTA CORPORATION


                                    AS TENANT
<PAGE>   18

                             BASIC LEASE INFORMATION

                                 INDUSTRIAL NET

<TABLE>
<S>                                                  <C>
LEASE DATE:                                          February 25, 1998

TENANT:                                              ADC Wireless Systems, Inc. a Minnesota corporation, a wholly
                                                     owned subsidiary of ADC Telecommunications, Inc., a
                                                     Minnesota corporation

TENANT'S NOTICE ADDRESS:                             P.O. Box 1101 Minneapolis, MN 55440-1101
                                                     Physical address: 12501 Whitewater Drive, Minnetonka, MN 55343
                                                     and Premises
TENANT'S BILLING ADDRESS:                            4790 Eastgate Mall, San Diego, CA  92121

TENANT CONTACT:  Richard Palmer,                     PHONE NUMBER: (612)946-3960
                 Director of Corporate Facilities    FAX NUMBER:   (612)946-3989
LANDLORD:                                            Spieker Properties, L.P., a California limited partnership

LANDLORD'S NOTICE ADDRESS:                           9255 Towne Centre Drive, Suite 100, San Diego, CA  92121

LANDLORD'S REMITTANCE ADDRESS:                       Spieker Properties,
                                                     Department 11491
                                                     P.O. Box  60077,
                                                     Los Angeles, CA  90060-0077
PROJECT
DESCRIPTION:                                         Approximately 215,800 square feet in 4 buildings
                                                     known as Bridge Pointe Corporate Centre, Phase I,
                                                     within the Eastgate Technology Park of San
                                                     Diego, California.
BUILDING
DESCRIPTION:                                         Approximately 60,900 square feet located at 4790 Eastgate
                                                     Mall, in the project known as Bridge Pointe Corporate
                                                     Centre, Phase I

PREMISES:                                            Approximately 60,900 square feet located at 4790 Eastgate
                                                     Mall, in the project known as Bridge Pointe Corporate
                                                     Centre, Phase I

PERMITTED USE:                                       Administrative office, lab and warehouse for the design and
                                                     manufacturing of broadband connectivity products and uses
                                                     incidental thereto as allowed under existing zoning.

PARKING DENSITY:                                     3.56/1,000 or 216 unreserved spaces TO INCLUDE AREA
                                                     TRANSFORMED TO TRUCKING ACCESS
OCCUPANCY DENSITY:                                   216 employees

SCHEDULED TERM COMMENCEMENT DATE:                    August 1, 1998

LENGTH OF TERM:                                      84 Months

RENT:
     BASE RENT:                                      August 1, 1998 - July 31, 1999      $66,990.00 per month
                                                     August 1, 1999 - July 31, 2000      $69,670.00 per month
                                                     August 1, 2000 - July 31, 2001      $72,450.00 per month
                                                     August 1, 2001 - July 31, 2002      $75,350.00 per month
                                                     August 1, 2002 - July 31, 2003      $78,370.00 per month
                                                     August 1, 2003 - July 31, 2004      $81,500.00 per month
                                                     August 1, 2004 - July 31, 2005      $84,760.00 per month

     ESTIMATED FIRST YEAR OPERATING EXPENSES:        $11,571.00 per month (MAY BE ALTERED BY A TAX REASSESSMENT
                                                     BASED ON SCOPE OF TENANT IMPROVEMENTS)

SECURITY DEPOSIT:                                    $44,000 UPON EXECUTION, AND AN ADDITIONAL $44,000 UPON
                                                     EXPIRATION OF GUARANTY OF LEASE AS DEFINED IN EXHIBIT F

TENANT'S PROPORTIONATE SHARE:

     OF BUILDING:                                    100%

     OF PROJECT:                                     28.22%
</TABLE>


The foregoing Basic Lease Information is incorporated into and made a part of
this Lease. Each reference in this Lease to any of the Basic Lease Information
shall mean the respective information above and shall be construed to
incorporate all of the


                                       2
<PAGE>   19

terms provided under the particular Lease paragraph pertaining to such
information. In the event of any conflict between the Basic Lease Information
and the Lease, the latter shall control.

                                       3
<PAGE>   20

                                TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                               PAGE
                                                                               ----
<S>                                                                             <C>
     Basic Lease Information................................................... 1
     Table of Contents......................................................... 2
1.   Premises.................................................................. 4
2.   Possession and Lease Commencement......................................... 4
3.   Term...................................................................... 4
4.   Use....................................................................... 4
5.   Rules and Regulations..................................................... 5
6.   Rent...................................................................... 5
7.   Operating Expenses........................................................ 5
8.   Insurance and Indemnification............................................. 7
9.   Waiver of Rights.......................................................... 7
10.  Landlord's Repairs and Maintenance........................................ 7
11.  Tenant's Repairs and Maintenance.......................................... 7
12.  Alterations............................................................... 7
13.  Signs..................................................................... 7
14.  Inspection/Posting Notices................................................ 7
15.  Utilities................................................................. 7
16.  Subordination............................................................. 7
17.  Financial Statements...................................................... 7
18.  Estoppel Certificate...................................................... 7
19.  Security Deposit.......................................................... 7
20.  Tenant's Remedies......................................................... 7
21.  Assignment and Subletting................................................. 7
22.  Authority of Tenant....................................................... 7
23.  Condemnation.............................................................. 7
24.  Casualty Damage........................................................... 7
25.  Holding Over.............................................................. 7
26.  Default................................................................... 7
27.  Liens..................................................................... 7
28.  Substitution.............................................................. 7
29.  Transfers by Landlord..................................................... 7
30.  Right of Landlord to Perform Tenant's Covenants........................... 7
31.  Waiver.................................................................... 7
32.  Notices................................................................... 7
33.  Attorney's Fees........................................................... 7
34.  Successors and Assigns.................................................... 7
35.  Force Majeure............................................................. 7
36.  Surrender of Premises..................................................... 7
37.  Miscellaneous............................................................. 7
38.  OPTION TO RELEASE.........................................................16
39.  CONDITIONAL APPROVAL OF TENANT'S ROOF MOUNTED ANTENNAE....................16
40.  Additional Provisions..................................................... 7
     Signatures................................................................ 7
</TABLE>


Exhibits:

     Exhibit A...................................Site Plan, Property Description
     Exhibit B............................Tenant Improvements and Specifications
     Exhibit C.............................................Rules and Regulations
     EXHIBIT D..........................TENANT'S HAZARDOUS MATERIALS DECLARATION
     EXHIBIT E..............................COMPREHENSIVE LAND USE PLAN ("CLUP")
     EXHIBIT F.................................................GUARANTY OF LEASE

                                       4
<PAGE>   21

                                      LEASE

THIS LEASE is made as of the 25th day of February 1998, by and between Spieker
Properties, L.P., a California limited partnership (hereinafter called
"LANDLORD"), and ADC Wireless Systems, Inc., a Minnesota corporation, a wholly
owned subsidiary of ADC Telecommunications, Inc., a Minnesota corporation
(hereinafter called "TENANT").

                                  1. PREMISES

     Landlord leases to Tenant and Tenant leases from Landlord, upon the terms
and conditions hereinafter set forth, those premises (the "PREMISES") outlined
in red on EXHIBIT A and described in the Basic Lease Information. The Premises
shall be all or part of a building (the "BUILDING") and of a project (the
"PROJECT") which may consist of more than one building, as described in the
Basic Lease Information. The Building and Project are outlined in blue and green
respectively on EXHIBIT A. Additionally, the number of buildings which
constitute the Project may change from time to time. Tenant accepts the area of
the Premises as specified in this Lease as the approximate area of the Premises,
and acknowledges and agrees that Tenant shall in no event be entitled to a
recalculation of the square footage of the Premises and that no such
recalculation shall reduce Tenant's obligations under this Lease in any manner,
including without limitation the amount of Base Rent payable by Tenant or
Tenant's Proportionate Share of the Building and of the Project.

                      2. POSSESSION AND LEASE COMMENCEMENT

A.   EXISTING IMPROVEMENTS. In the event that this Lease pertains to a Premises
in which the interior improvements have already been constructed ("EXISTING
IMPROVEMENTS"), the provisions of this Paragraph 2.A. shall apply and the term
commencement date ("TERM COMMENCEMENT DATE") shall be the earlier of the date on
which: (1) Tenant takes possession of some or all of the Premises; or (2)
Landlord notifies Tenant that Tenant may occupy the Premises. If for any reason
Landlord cannot deliver possession of the Premises to Tenant on the scheduled
Term Commencement Date, Landlord shall not be subject to any liability therefor,
nor shall Landlord be in default hereunder nor shall such failure affect the
validity of this Lease, and Tenant agrees to accept possession of the Premises
at such time as Landlord is able to deliver the same, which date shall then be
deemed the Term Commencement Date. Tenant shall not be liable for any Rent
(defined below) for any period prior to the Term Commencement Date. Tenant
acknowledges that Tenant has inspected and accepts the Premises in their present
condition, broom clean, "as is," and as suitable for the purpose for which the
Premises are leased and for Tenant's intended use of the Premises. Tenant agrees
that the Premises and other improvements are in good and satisfactory condition
as of when possession was taken. Tenant further acknowledges that no
representations as to the condition or repair of the Premises nor promises to
alter, remodel or improve the Premises have been made by Landlord or any agents
of Landlord unless such are expressly set forth in this Lease. Upon Landlord's
request, Tenant shall execute and return to Landlord a "Start-Up Letter" in
which Tenant shall agree, among other things, to acceptance of the Premises and
to the determination of the Term Commencement Date, in accordance with the terms
of this Lease.

B.   CONSTRUCTION OF IMPROVEMENTS. In the event that this Lease pertains to a
Building to be constructed or improvements to be constructed within a Building,
the provisions of this Paragraph 2.B. shall apply in lieu of the provisions of
Paragraph 2.A. above and the term commencement date ("TERM COMMENCEMENT DATE")
shall be the earlier of the date on which: (1) Tenant takes possession of some
or all of the Premises; or (2) the improvements constructed or to be constructed
in the Premises by Landlord (if any) shall have been substantially completed in
accordance with the plans and specifications described on EXHIBIT B, whether or
not substantial completion of the Building or Project shall have occurred. If
for any reason Landlord cannot deliver possession of the Premises to Tenant on
the scheduled Term Commencement Date, Landlord shall not be subject to any
liability therefor, nor shall Landlord be in default hereunder nor shall such
failure affect the validity of this Lease, and Tenant agrees to accept
possession of the Premises at such time as such improvements have been
substantially completed, which date shall then be deemed the Term Commencement
Date. Tenant shall not be liable for any Rent for any period prior to the Term
Commencement Date (but without affecting any obligations of Tenant under any
work letter appended to this Lease). In the event of any dispute as to
substantial completion of work performed or required to be performed by
Landlord, the certificate of Landlord's architect or general contractor shall be
conclusive. Substantial completion shall have occurred notwithstanding Tenant's
submission of a punchlist to Landlord, which Tenant shall submit, if at all,
within fifteen (15) days after the Term Commencement Date. Upon Landlord's
request, Tenant shall promptly execute and return to Landlord a Start-Up Letter
in which Tenant shall agree, among other things, to acceptance of the Premises
and to the determination of the Term Commencement Date, in accordance with the
terms of this Lease.

                                    3. TERM

     The term of this Lease (the "TERM") shall commence on the Term Commencement
Date and continue in full force and effect for the number of months specified as
the Length of Term in the Basic Lease Information or until this Lease is
terminated as otherwise provided herein. If the Term Commencement Date is a date
other than the first day of the calendar month, the Term shall be the number of
months of the Length of Term in addition to the remainder of the calendar month
following the Term Commencement Date.

                                     4. USE

A.   GENERAL. Tenant shall use the Premises for the permitted use specified in
the Basic Lease Information ("PERMITTED USE") and for no other use or purpose.
Tenant shall control Tenant's employees, agents, customers, visitors, invitees,
licensees, contractors, assignees and subtenants (collectively, "TENANT'S
PARTIES") in such a manner that Tenant and Tenant's Parties cumulatively do not
exceed the parking density specified in the Basic Lease Information (the
"PARKING DENSITY") at any time. Tenant and Tenant's Parties shall have the
nonexclusive right to use, in common with other parties occupying the Building
or Project, the parking areas, driveways and other common areas of the Building
and Project, subject to such rules and regulations as Landlord may from time to
time prescribe.

B.   LIMITATIONS. Tenant shall not permit any odors, smoke, dust, gas,
substances, noise or vibrations to emanate from the Premises or from any portion
of the common areas as a result of Tenant's or any Tenant's Party's use thereof,
nor take any action which would constitute a nuisance or would disturb, obstruct
or endanger any other tenants or occupants of the Building or Project or
interfere with their use of their respective premises or common areas. Storage
outside the Premises of materials, vehicles or any other items is prohibited.
Tenant shall not use or allow the Premises to be used for any immoral, improper
or unlawful purpose, nor shall Tenant cause or maintain or permit any nuisance
in, on or about the Premises. Tenant shall not commit or suffer the commission
of any waste in, on or about the Premises. Tenant shall not allow any sale by
auction upon the Premises, or place any loads upon the floors, walls or ceilings
which endanger the structure, or place any harmful substances in the drainage
system of the Building or Project. No waste, materials or refuse shall be dumped
upon or permitted to remain outside the Premises except in trash containers
placed inside exterior enclosures designated for that purpose by Landlord.
Landlord shall not be responsible to Tenant for the non-compliance by any other
tenant or

                                       5
<PAGE>   22

occupant of the Building or Project with any of the above-referenced rules or
any other terms or provisions of such tenant's or occupant's lease or other
contract.

C.   COMPLIANCE WITH REGULATIONS. By entering the Premises, Tenant accepts the
Premises in the condition existing as of the date of such entry. Tenant shall at
its sole cost and expense strictly comply with all existing or future applicable
municipal, state and federal and other governmental statutes, rules,
requirements, regulations, laws and ordinances, including zoning ordinances and
regulations, and covenants, easements and restrictions of record governing and
relating to the use, occupancy or possession of the Premises, to Tenant's use of
the common areas, or to the use, storage, generation or disposal of Hazardous
Materials (hereinafter defined) (collectively "REGULATIONS"). Tenant shall at
its sole cost and expense obtain any and all licenses or permits necessary for
Tenant's use of the Premises. Tenant shall at its sole cost and expense promptly
comply with the requirements of any board of fire underwriters or other similar
body now or hereafter constituted. Tenant shall not do or permit anything to be
done in, on, under or about the Project or bring or keep anything which will in
any way increase the rate of any insurance upon the Premises, Building or
Project or upon any contents therein or cause a cancellation of said insurance
or otherwise affect said insurance in any manner. Tenant shall indemnify,
defend, protect and hold Landlord harmless from and against any loss, cost,
expense, damage, attorneys' fees or liability arising out of the failure of
Tenant to comply with any Regulation. Tenant's obligations pursuant to the
foregoing indemnity shall survive the expiration or earlier termination of this
Lease.

D.   HAZARDOUS MATERIALS. As used in this Lease, "HAZARDOUS MATERIALS" shall
include, but not be limited to, hazardous, toxic and radioactive materials and
those substances defined as "hazardous substances," "hazardous materials,"
"hazardous wastes," "toxic substances," or other similar designations in any
Regulation. Tenant shall not cause, or allow any of Tenant's Parties to cause,
any Hazardous Materials to be used, generated, stored or disposed of on or about
the Premises, the Building or the Project or surrounding land or environment in
violation of any Regulations. Tenant must obtain Landlord's written consent
prior to the introduction of any Hazardous Materials onto the Project EXCEPT
THOSE APPROVED PRIOR TO OCCUPANCY PER THIS LEASE. Notwithstanding the foregoing,
Tenant may handle, store, use and dispose of products containing small
quantities of Hazardous Materials for "general office purposes" (such as toner
for copiers) to the extent customary and necessary for the Permitted Use of the
Premises; provided that Tenant shall always handle, store, use, and dispose of
any such Hazardous Materials in a safe and lawful manner and never allow such
Hazardous Materials to contaminate the Premises, Building, or Project or
surrounding land or environment. Tenant shall immediately notify Landlord of any
Hazardous Materials' contamination of any portion of the Project of which Tenant
becomes aware, whether or not caused by Tenant. Landlord shall have the right at
all reasonable times to inspect the Premises and to conduct REASONABLE tests and
investigations to determine whether Tenant is in compliance with the foregoing
provisions, the costs of all such inspections, tests and investigations to be
borne by Tenant (COSTS TO TENANT EXCEEDING $1,000 ANNUALLY MUST HAVE WRITTEN
NOTICE SENT TO TENANT IDENTIFYING EXPECTED COST, BUT NOT IDENTIFYING DATE OR
TIME OF INSPECTION). Tenant shall indemnify, defend, protect and hold Landlord
harmless from and against all liabilities, losses, costs and expenses (including
REASONABLE attorneys' and consultants' fees), demands, causes of action, claims
or judgments directly or indirectly arising out of the use, generation, storage,
release, or disposal of Hazardous Materials by Tenant or any of Tenant's Parties
in, on or about the Premises, the Building or the Project or surrounding land or
environment, which indemnity shall include, without limitation, damages for
personal or bodily injury, property damage, damage to the environment or natural
resources occurring on or off the Premises, losses attributable to diminution in
value or adverse effects on marketability, the cost of any investigation,
monitoring, government oversight, repair, removal, remediation, restoration,
abatement, and disposal, and the preparation of any closure or other required
plans, whether such action is required or necessary prior to or following the
expiration or earlier termination of this Lease. Neither the consent by Landlord
to the use, generation, storage, release or disposal of Hazardous Materials nor
the strict compliance by Tenant with all laws pertaining to Hazardous Materials
shall excuse Tenant from Tenant's obligation of indemnification pursuant to this
Paragraph 4.D. Tenant's obligations pursuant to the foregoing indemnity shall
survive the expiration or earlier termination of this Lease. TENANT HAS THE
RIGHT TO CONDUCT ITS OWN ENVIRONMENTAL STUDIES OR, PRIOR TO OCCUPANCY, TO REVIEW
IN LANDLORD'S OFFICES THE STUDIES IN LANDLORD'S POSSESSION AS OF THE DATE OF
THIS LEASE. LANDLORD SHALL INDEMNIFY, DEFEND AND HOLD TENANT, ITS AFFILIATES,
THEIR RESPECTIVE DIRECTORS, OFFICERS, EMPLOYEES AND AGENTS HARMLESS FROM AND
AGAINST ANY AND ALL CLAIMS, JUDGMENTS, DAMAGES, PENALTIES, FINES, COSTS,
LIABILITIES OR LOSSES AND ATTORNEYS' FEES ARISING OUT OF ANY HAZARDOUS MATERIAL
IN, ON OR ABOUT THE PROJECT OR PREMISES WHICH WAS CREATED, HANDLED, PLACED,
STORED, USED, TRANSPORTED OR DISPOSED OF BY LANDLORD FROM DATE OF ITS OWNERSHIP
OF THE PROPERTY IN JANUARY 1997 TO THE DATE OF THIS LEASE, EXCLUDING, HOWEVER,
ANY HAZARDOUS MATERIAL WHOSE PRESENCE WAS CAUSED BY TENANT OR ITS AFFILIATES OR
THEIR RESPECTIVE AGENTS.

                            5. RULES AND REGULATIONS

     Tenant shall faithfully observe and comply with any rules and regulations
and any modifications or additions thereto which Landlord may from time to time
prescribe in writing for the purpose of maintaining the proper care,
cleanliness, safety, traffic flow and general order of the Premises or the
Building or Project. Tenant shall cause Tenant's Parties to comply with such
rules and regulations. Landlord shall not be responsible to Tenant for the
non-compliance by any other tenant or occupant of the Building or Project with
any of such rules and regulations, any other tenant's or occupant's lease or any
Regulations.

                                    6. RENT

A.   BASE RENT. Tenant shall pay to Landlord and Landlord shall receive, without
notice or demand throughout the Term, Base Rent as specified in the Basic Lease
Information, payable in monthly installments in advance on or before the first
day of each calendar month, in lawful money of the United States, without
deduction or offset whatsoever, at the Remittance Address specified in the Basic
Lease Information or to such other place as Landlord may from time to time
designate in writing. Base Rent for the first full month of the Term shall be
paid by Tenant upon Tenant's execution of this Lease. If the obligation for
payment of Base Rent commences on other than the first day of a month, then Base
Rent shall be prorated and the prorated installment shall be paid on the first
day of the calendar month next succeeding the Term Commencement Date. The Base
Rent payable by Tenant hereunder is subject to adjustment as provided in addenda
appended to this Lease (if referred to in Paragraph 38.A.). As used herein, the
term "Base Rent" shall mean the Base Rent specified in the Basic Lease
Information as it may be so adjusted from time to time.

B.   ADDITIONAL RENT. All monies other than Base Rent required to be paid by
Tenant hereunder, including, but not limited to, Tenant's Proportionate Share of
Operating Expenses, as specified in Paragraph 7 of this Lease, the interest and
late charge described in Paragraphs 26.C. and D., and any monies spent by
Landlord pursuant to Paragraph 30, shall be considered additional rent
("ADDITIONAL RENT"). "RENT" shall mean Base Rent and Additional Rent.

                              7. OPERATING EXPENSES

A. OPERATING EXPENSES. In addition to the Base Rent required to be paid
hereunder, Tenant shall pay as Additional Rent, Tenant's Proportionate Share, as
defined in the Basic Lease Information, of Operating Expenses (defined below) in
the manner set forth below. Tenant shall pay the applicable Tenant's
Proportionate Share of each such Operating Expenses. Landlord and Tenant
acknowledge that if the number of buildings which constitute the Project
increases or decreases, Landlord shall reasonably adjust Tenant's Proportionate
Share of the Project to reflect the change. Landlord's determination of Tenant's
Proportionate Share of the Building and of the Project shall be conclusive so
long as it is reasonably and consistently applied. "OPERATING EXPENSES" shall
mean all expenses and costs of

                                       6
<PAGE>   23

every kind and nature which Landlord shall pay or become obligated to pay,
because of or in connection with the ownership, management, maintenance, repair,
preservation, replacement and operation of the Building or Project and its
supporting facilities (as determined in a reasonable manner) other than those
expenses and costs which are specifically attributable to Tenant or which are
expressly made the financial responsibility of Landlord pursuant to this Lease.
Operating Expenses shall include, but are not limited to, the following (UNLESS
SPECIFICALLY EXCLUDED IN THIS LEASE):

     (1)  TAXES. All real property taxes and assessments, possessory interest
     taxes, sales taxes, personal property taxes, business or license taxes or
     fees, gross receipts taxes, service payments in lieu of such taxes or fees,
     annual or periodic license or use fees, excises, transit charges, and other
     impositions, general and special, ordinary and extraordinary, unforeseen as
     well as foreseen, of any kind (including fees "in-lieu" of any such tax or
     assessment) which are now or hereafter assessed, levied, charged,
     confirmed, or imposed by any public authority upon the Building or Project,
     its operations or the Rent (or any portion or component thereof), or any
     tax, assessment or fee imposed in substitution, partially or totally, of
     any of the above. Operating Expenses shall also include any taxes,
     assessments, or other fees or impositions with respect to the development,
     leasing, management, maintenance, alteration, repair, use or occupancy by
     Tenant of the Premises or any portion thereof, or upon this transaction or
     any document creating or transferring an interest in the Premises. In the
     event that it shall not be lawful for Tenant to reimburse Landlord for all
     or any part of such taxes, the monthly rental payable to Landlord under
     this Lease shall be revised to net Landlord the same net rental after
     imposition of any such taxes by Landlord as would have been payable to
     Landlord prior to the payment of any such taxes.

     (2)  INSURANCE. All insurance premiums and costs, including, but not
     limited to, any deductible amounts, premiums and other costs of insurance
     incurred by Landlord, including for the insurance coverage set forth in
     Paragraph 8.A. herein.

     (3)  COMMON AREA MAINTENANCE

          (a)  Repairs, replacements, and general maintenance of and for the
          Building and Project and public and common areas of the Building and
          Project, including, but not limited to, the roof, pest extermination,
          landscaped areas, parking and service areas, driveways, truck staging
          areas, rail spur areas, fire sprinkler systems, sanitary and storm
          sewer lines, utility services, electric and telephone equipment and
          wiring servicing, exterior lighting, and any other items or areas
          which affect the operation or exterior appearance of the Building or
          Project, which determination shall be at Landlord's discretion, except
          for: those items expressly made the financial responsibility of
          Landlord pursuant to Paragraph 10 hereof; those items to the extent
          paid for by the proceeds of insurance; and those items attributable
          solely or jointly to specific tenants of the Building or Project.

          (b)  Repairs, replacements, and general maintenance shall include the
          cost of any capital improvements made to or capital assets acquired
          for the Project or Building that in Landlord's discretion may reduce
          any other Operating Expenses, including present or future repair work,
          are reasonably necessary for the health and safety of the occupants of
          the Building or Project, or are required under any governmental law or
          regulation, such costs or allocable portions thereof to be amortized
          over such reasonable period as Landlord shall determine, together with
          interest on the unamortized balance at the "prime rate" charged by
          Wells Fargo Bank, N.A. (San Francisco) or its successor at the time
          such improvements or capital assets are constructed or acquired, plus
          two (2) percentage points, but in no event more than the maximum rate
          permitted by law.

          (c)  Payment under or for any easement, license, permit, operating
          agreement, declaration, restrictive covenant or instrument relating to
          the Building or Project.

          (d)  All expenses related to services and costs of supplies and
          equipment used in maintaining the Premises, Building and Project, the
          equipment therein and the adjacent sidewalks, driveways, parking and
          service areas, including, without limitation, expenses related to
          service agreements regarding security and fire and other alarm
          systems, janitorial services to the extent not addressed in Paragraph
          11 hereof, window cleaning, elevator maintenance, Building exterior
          maintenance, landscaping and expenses related to the administration,
          management and operation of the Project, including without limitation
          salaries, wages and benefits.

     (4)  UTILITIES. The cost of supplying any utilities which benefit all or a
     portion of the Premises, Building or Project to the extent not addressed in
     Paragraph 15 hereof.

     (5)  MANAGEMENT FEE. A management and accounting cost recovery fee equal to
     three percent (3%) of the sum of Base Rent and Tenant's Proportionate Share
     of Operating Expenses.

In the event that the Building and/or Project is not fully occupied during any
fiscal year of the Term as determined by Landlord, an adjustment shall be made
in computing the Operating Expenses for such year so that Tenant pays an
equitable portion of all variable items (i.e. component expenses that are
affected by variations in occupancy levels) of Operating Expenses, as reasonably
determined by Landlord; provided, however, that in no event shall Landlord be
entitled to collect in excess of one hundred percent (100%) of the total
Operating Expenses from all of the tenants in the Building or Project, as the
case may be.

Operating Expenses shall not include specific costs incurred for the account of,
separately billed to and paid by specific tenants. Notwithstanding anything
herein to the contrary, in any instance wherein Landlord, in Landlord's
REASONABLE sole discretion, deems Tenant to be responsible for any amounts
greater than Tenant's Proportionate Share, Landlord shall have the right to
allocate costs in any manner Landlord deems appropriate.

The above enumeration of services and facilities shall not be deemed to impose
an obligation on Landlord to make available or provide such services or
facilities except to the extent Landlord has specifically agreed elsewhere in
this Lease to make the same available or provide the same. Without limiting the
generality of the foregoing, Tenant acknowledges and agrees that it shall be
responsible for providing adequate security for its use of the Premises and
Project and that Landlord shall have no obligation or liability with respect
thereto, except to the extent Landlord has specifically agreed elsewhere in this
Lease to provide the same.

EXCLUSIONS FROM OPERATING EXPENSES. THE FOLLOWING ARE EXCLUDED FROM OPERATING
EXPENSES: a. DEPRECIATION; b. CURRENT OR FUTURE FINANCING AND REFINANCING COSTS,
INTEREST ON DEBT OR AMORTIZATION PAYMENTS, AND RENTAL UNDER ANY GROUND OR
UNDERLYING LEASES OR LEASE; c. LEGAL OR OTHER FEES, LEASING COMMISSIONS,
ADVERTISING EXPENSES AND OTHER COSTS INCURRED IN CONNECTION WITH LEASING OF THE
BUILDING OR PROJECT OR DISPUTES WITH TENANTS; d. BAD DEBT LOSS, RENT LOSS OR
RESERVES FOR BAD DEBTS OR RENT LOSS; e. COSTS ASSOCIATED WITH THE OPERATION OF
THE BUSINESS OF THE ENTITY WHICH CONSTITUTES LANDLORD NOT RELATED TO PROPERTY
MANAGEMENT (EXCLUDED ITEMS SHALL SPECIFICALLY INCLUDE, BUT SHALL NOT BE LIMITED
TO, FORMATION OF THE ENTITY, INTERNAL ACCOUNTING AND LEGAL MATTERS, PREPARATION
OF TAX RETURNS AND FINANCIAL STATEMENTS AND GATHERING OF DATA THEREFOR, COSTS OF
DEFENDING ANY LAWSUITS WITH ANY MORTGAGEE (EXCEPT AS THE ACTIONS OF TENANT MAY
BE IN ISSUE), COSTS OF SELLING, SYNDICATING, FINANCING, MORTGAGING OR
HYPOTHECATING

                                       7
<PAGE>   24

ANY OF THE LANDLORD'S INTERESTS IN THE BUILDING OR PROJECT, COSTS OF ANY
DISPUTES BETWEEN LANDLORD AND ITS EMPLOYEES NOT ENGAGED IN THE OPERATION OF THE
BUILDING, DISPUTES BETWEEN LANDLORD AND MANAGERS OF THE BUILDING OR PROJECT, AND
DISPUTES BETWEEN LANDLORD AND TENANTS WITHIN THE BUILDING AND PROJECT); f. THE
WAGES, SALARIES, BONUSES AND BENEFITS OF ALL MANAGEMENT PERSONNEL ABOVE THE
LEVEL OF PROJECT DIRECTOR; g. COSTS OF REMOVAL AND/OR ABATEMENT OF HAZARDOUS OR
TOXIC SUBSTANCES, WASTES OR MATERIALS FROM THE BUILDING, PROJECT OR THE LAND
UPON WHICH IT IS SITUATED, h. THE COST OF ANY REPAIR IN OR ABOUT THE PREMISES TO
REMEDY DAMAGE CAUSED BY OR RESULTING FROM THE NEGLIGENCE OF ANY OTHER TENANTS IN
THE PROJECT, INCLUDING THEIR AGENTS, SERVANTS, EMPLOYEES OR INVITEES, IF AND TO
THE EXTENT LANDLORD SHALL RECOVER THE COST THEREOF FROM SAID PARTIES IN EXCESS
OF COSTS AND EXPENSES OF RECOVERY INCURRED BY LANDLORD, PROVIDED LANDLORD
EXERCISES REASONABLE EFFORTS TO RECOVER THE COST.

A.   PAYMENT OF ESTIMATED OPERATING EXPENSES. "ESTIMATED OPERATING EXPENSES" for
any particular year shall mean Landlord's estimate of the Operating Expenses for
such fiscal year made with respect to such fiscal year as hereinafter provided.
Landlord shall have the right from time to time to revise its fiscal year and
interim accounting periods so long as the periods as so revised are reconciled
with prior periods in a reasonable manner. During the last month of each fiscal
year during the Term, or as soon thereafter as practicable, Landlord shall give
Tenant written notice of the Estimated Operating Expenses for the ensuing fiscal
year. Tenant shall pay Tenant's Proportionate Share of the Estimated Operating
Expenses with installments of Base Rent for the fiscal year to which the
Estimated Operating Expenses applies in monthly installments on the first day of
each calendar month during such year, in advance. If at any time during the
course of the fiscal year, Landlord determines that Operating Expenses are
projected to vary from the then Estimated Operating Expenses by more than ten
percent (10%), Landlord may, by written notice to Tenant, revise the Estimated
Operating Expenses for the balance of such fiscal year, and Tenant's monthly
installments for the remainder of such year shall be adjusted so that by the end
of such fiscal year Tenant has paid to Landlord Tenant's Proportionate Share of
the revised Estimated Operating Expenses for such year.

B.   COMPUTATION OF OPERATING EXPENSE ADJUSTMENT. "OPERATING EXPENSE ADJUSTMENT"
     shall mean the difference between Estimated Operating Expenses and actual
Operating Expenses for any fiscal year determined as hereinafter provided.
Within one hundred twenty (120) days after the end of each fiscal year, as
determined by Landlord, or as soon thereafter as practicable, Landlord shall
deliver to Tenant a statement of actual Operating Expenses for the fiscal year
just ended, accompanied by a computation of Operating Expense Adjustment. If
such statement shows that Tenant's payment based upon Estimated Operating
Expenses is less than Tenant's Proportionate Share of Operating Expenses, then
Tenant shall pay to Landlord the difference within THIRTY (30) days after
receipt of such statement. If such statement shows that Tenant's payments of
Estimated Operating Expenses exceed Tenant's Proportionate Share of Operating
Expenses, then (provided that Tenant is not in default under this Lease)
Landlord shall pay to Tenant the difference within THIRTY (30) days after
delivery of such statement to Tenant. If this Lease has been terminated or the
Term hereof has expired prior to the date of such statement, then the Operating
Expense Adjustment shall be paid by the appropriate party within THIRTY (30)
days after the date of delivery of the statement. Should this Lease commence or
terminate at any time other than the first day of the fiscal year, Tenant's
Proportionate Share of the Operating Expense Adjustment shall be prorated by
reference to the exact number of calendar days during such fiscal year that this
Lease is in effect.

C.   NET LEASE. This shall be a triple net Lease and Base Rent shall be paid to
Landlord absolutely net of all costs and expenses, except as specifically
provided to the contrary in this Lease. The provisions for payment of Operating
Expenses and the Operating Expense Adjustment are intended to pass on to Tenant
and reimburse Landlord for all costs and expenses of the nature described in
Paragraph 7.A. incurred in connection with the ownership, management,
maintenance, repair, preservation, replacement and operation of the Building
and/or Project and such additional facilities now and in subsequent years as may
be determined by Landlord to be necessary to the Building and/or Project.

D.   TENANT AUDIT. In the event that Tenant shall dispute the amount set forth
in any statement provided by Landlord under Paragraph 7.B. or 7.C. above, Tenant
shall have the right, not later than FORTY-FIVE (45) days following receipt of
such statement and upon the condition that Tenant shall first deposit with
Landlord the full amount in dispute, to cause Landlord's books and records with
respect to Operating Expenses for such fiscal year to be audited by certified
public accountants selected by Tenant and subject to Landlord's reasonable right
of approval. The Operating Expense Adjustment shall be appropriately adjusted on
the basis of such audit. If such audit discloses a liability for a refund in
excess of ten percent (10%) of Tenant's Proportionate Share of the Operating
Expense Adjustment previously reported, the cost of such audit shall be borne by
Landlord; otherwise the cost of such audit shall be paid by Tenant. If Tenant
shall not request an audit in accordance with the provisions of this Paragraph
7.E. within FORTY-FIVE (45) days after receipt of Landlord's statement
provided pursuant to Paragraph 7.B. or 7.C., such statement shall be final and
binding for all purposes hereof.

                        8. INSURANCE AND INDEMNIFICATION

A.   LANDLORD'S INSURANCE. All insurance maintained by Landlord shall be for the
sole benefit of Landlord and under Landlord's sole control.

     (1)  PROPERTY INSURANCE. Landlord agrees to maintain property insurance
     insuring the Building against damage or destruction due to risks including
     fire, vandalism, and malicious mischief in an amount not less than the
     replacement cost thereof, in the form and with deductibles and endorsements
     as selected by Landlord. At its election, Landlord may instead obtain "All
     Risk" coverage, and may also obtain earthquake, pollution, and/or flood
     insurance in amounts selected by Landlord.

     (2)  OPTIONAL INSURANCE. Landlord, at Landlord's option, may also carry
     insurance against loss of rent, in an amount equal to the amount of Base
     Rent and Additional Rent that Landlord could be required to abate to all
     Building tenants in the event of condemnation or casualty damage for a
     period of twelve (12) months. Landlord may also carry such other insurance
     as Landlord may deem prudent or advisable, including, without limitation,
     liability insurance in such amounts and on such terms as Landlord shall
     determine. Landlord shall not be obligated to insure any furniture,
     machinery, goods, inventory or supplies, or other personal property or
     fixtures which Tenant may keep or maintain in the Premises, or any
     leasehold improvements, additions or alterations within the Premises.

B.   TENANT'S INSURANCE.

A PORTION OF THE COVERAGES TENANT IS REQUIRED TO MAINTAIN UNDER THIS LEASE MAY
BE MAINTAINED UNDER A PROGRAM OF TENANT SELF-INSURANCE OR UNDER POLICIES THAT
INCLUDE SELF-INSURED RETENTIONS OR DEDUCTIBLES LARGER THAN THOSE TYPICALLY
CARRIED BY SIMILARLY SITUATED TENANTS. BEFORE THE TERM COMMENCEMENT DATE, TENANT
SHALL ADVISE LANDLORD OF THE SELF-INSURANCE PROGRAM, SELF-INSURED RETENTIONS, OR
DEDUCTIBLES. LANDLORD IS CONSIDERED TO CONSENT TO THE SELF-INSURANCE PROGRAM,
SELF-INSURED RETENTIONS, OR DEDUCTIBLES AS LONG AS TENANT'S NET WORTH AND NET
CURRENT ASSETS EXCEED THEIR CURRENT LEVELS OF $750,000,000 AND $549,000,000
RESPECTIVELY.

     (1)  PROPERTY INSURANCE. Tenant shall procure at Tenant's sole cost and
     expense and keep in effect from the date of this Lease and at all times
     until the end of the Term, insurance on all

                                       8
<PAGE>   25

     improvements, additions or alterations made by or for Tenant to the
     Premises on an "All Risk" basis, insuring such property for the full
     replacement value of such property.

     (2)  LIABILITY INSURANCE. Tenant shall procure at Tenant's sole cost and
     expense and keep in effect from the date of this Lease and at all times
     until the end of the Term Commercial General Liability insurance applying
     to the use and occupancy of the Premises and the Project, and any part of
     either, and any areas adjacent thereto, and the business operated by Tenant
     or by any other occupant of the Premises. Such insurance shall include
     Broad Form Contractual Liability insurance coverage insuring all of
     Tenant's indemnity obligations under this Lease FOR BODILY INJURY, DEATH
     AND TANGIBLE PROPERTY DAMAGE. Such coverage shall have a minimum combined
     single limit of liability of at least Two Million Dollars ($2,000,000.00),
     and a minimum general aggregate limit of Three Million Dollars
     ($3,000,000.00), with an "Additional Insured - Managers or Lessors of
     Premises Endorsement". All such policies shall be written to apply to all
     bodily injury, property damage or loss, personal injury and other covered
     loss, however occasioned, occurring during the policy term, shall be
     endorsed to add Landlord and any party holding an interest to which this
     Lease may be subordinated as an additional insured, and shall provide that
     such coverage shall be "PRIMARY" and non-contributing with any insurance
     maintained by Landlord, which shall be excess insurance only. Such coverage
     shall also contain endorsements: (i) deleting any employee exclusion on
     personal injury coverage; (ii) including employees as additional insureds;
     and (iii) providing for coverage of employer's automobile non-ownership
     liability. All such insurance shall provide for the severability of
     interests of insureds; and shall be written on an "OCCURRENCE" basis, which
     shall afford coverage for all claims based on acts, omissions, injury and
     damage, which occurred or arose (or the onset of which occurred or arose)
     in whole or in part during the policy period. Tenant shall also procure at
     Tenant's sole cost and expense and keep in effect during the Term of this
     Lease, Legal Liability Insurance covering direct physical damage and loss
     of use of the Building for which Tenant is legally obligated in an amount
     of the full replacement value of the Building.

     (3)  WORKERS' COMPENSATION AND EMPLOYERS' LIABILITY INSURANCE. Tenant shall
     carry Workers' Compensation Insurance as required by any Regulation,
     throughout the Term at Tenant's sole cost and expense. Tenant shall also
     carry Employers' Liability Insurance in amounts not less than One Million
     Dollars ($1,000,000) each accident for bodily injury by accident; One
     Million Dollars ($1,000,000) policy limit for bodily injury by disease; and
     One Million Dollars ($1,000,000) each employee for bodily injury by
     disease, throughout the Term at Tenant's sole cost and expense.

     (4)  COMMERCIAL AUTO LIABILITY INSURANCE. Tenant shall procure at Tenant's
     sole cost and expense and keep in effect from the date of this Lease and at
     all times until the end of the Term commercial auto liability insurance
     with a combined limit of not less than One Million Dollars ($1,000,000) for
     bodily injury and property damage for each accident. Such insurance shall
     cover liability relating to any auto (including owned, hired and non-owned
     autos).

     (5)  GENERAL INSURANCE REQUIREMENTS. All coverages described in this
     Paragraph 8.B. shall be endorsed to (i) provide Landlord with thirty (30)
     days' notice of cancellation or MATERIAL change in terms; and (ii) waive
     all rights of subrogation by the insurance carrier against Landlord
     REGARDING PROPERTY DAMAGE. If at any time during the Term the amount or
     coverage of insurance which Tenant is required to carry under this
     Paragraph 8.B. is, in Landlord's reasonable judgment, materially less than
     the amount or type of insurance coverage typically carried by owners or
     tenants of properties located in the general area in which the Premises are
     located which are similar to and operated for similar purposes as the
     Premises or if Tenant's use of the Premises should change with or without
     Landlord's consent, Landlord shall have the right to require Tenant to
     increase the amount or change the types of insurance coverage required
     under this Paragraph 8.B. All insurance policies required to be carried
     under this Lease shall be written by companies rated A VIII or better in
     "Best's Insurance Guide" and authorized to do business in the State of
     California. In any event deductible amounts shall not exceed Five Thousand
     Dollars ($5,000.00). Tenant shall deliver to Landlord on or before the Term
     Commencement Date, and thereafter at least thirty (30) days before the
     expiration dates of the expired policies, a certificate evidencing the same
     issued by the insurer thereunder; and, in the event Tenant shall fail to
     procure such insurance, or to deliver such policies or certificates,
     Landlord may, at Landlord's option and in addition to Landlord's other
     remedies in the event of a default by Tenant hereunder, procure the same
     for the account of Tenant, and the cost thereof shall be paid to Landlord
     as Additional Rent.

     (6)  INDEMNIFICATION. Landlord shall indemnify, defend by counsel
     reasonably acceptable to Tenant, protect and hold Tenant harmless from and
     against any and all claims, liabilities, losses, costs, damages, injuries
     or expenses, including reasonable attorneys' fees and court costs, arising
     out of or related to the sole negligence or willful misconduct of Landlord.
     Notwithstanding the foregoing or anything to the contrary contained in this
     Lease, Landlord shall in no event be liable and Tenant hereby waives all
     claims against Landlord for any loss, damage, injury or death to or of any
     person or property (including without limitation personal property) caused
     by theft, fire, rain or water leakage, or from the breakage, leakage,
     obstruction or other defects of pipes, fire sprinklers, wires, appliances,
     plumbing, HVAC or lighting fixtures, electrical or other systems, or by
     acts of God (including without limitation flood or earthquake), acts of a
     public enemy, riot, strike, insurrection, war, court order, requisition or
     order of governmental body or authority or for any damage or inconvenience
     which may arise through repair, except as expressly otherwise provided in
     Paragraph 10. In addition, Landlord shall in no event be liable for injury
     to Tenant's business or any loss of income or profit therefrom or for
     consequential damages. Tenant shall indemnify, defend by counsel
     reasonably acceptable to Landlord, protect and hold Landlord harmless from
     and against any and all claims, liabilities, losses, costs, loss of rents,
     liens, damages, injuries or expenses, including reasonable attorneys' fees
     and court costs, arising out of or related to: (1) claims of injury to or
     death of persons or damage to property occurring or resulting directly or
     indirectly from the use or occupancy of the Premises by Tenant or Tenant's
     Parties, or from activities of Tenant or Tenant's Parties; (2) claims
     arising from work or labor performed BY TENANT OR ITS AGENTS, or for
     materials or supplies furnished to or at the request of Tenant in
     connection with performance of any work done for the account of Tenant
     within the Premises or Project FOR WHICH TENANT CONTRACTED DIRECTLY WITH
     SUCH SUPPLIER; (3) claims arising from any breach or default on the part of
     Tenant in the performance of any covenant contained in this Lease; and (4)
     claims arising from the negligence or intentional acts or omissions of
     Tenant or Tenant's Parties. The foregoing indemnity by Tenant shall not be
     applicable to claims to the extent arising from the sole negligence or
     willful misconduct of Landlord. The provisions of this Paragraph shall
     survive the expiration or earlier termination of this Lease.

                            9. WAIVER OF SUBROGATION

     To the extent permitted by law and without affecting the coverage provided
by insurance to be maintained hereunder or any other rights or remedies,
Landlord and Tenant each waive any right to recover against the other for (a)
damages to property, including personal property; (b) damages to the Premises or
any part thereof; and (c) claims arising by reason of the foregoing due to
hazards covered by insurance to the extent of proceeds recovered therefrom. This
provision is intended to waive fully, any rights and/or claims arising by reason
of the foregoing, but only to the extent that any of the foregoing damages
and/or claims referred to above are covered, and only to the extent of such
coverage, by insurance actually carried by either Landlord or Tenant.

                                       9
<PAGE>   26

This provision is also intended to waive fully, and for the benefit of each
party, any rights and/or claims which might give rise to a right of subrogation
on any insurance carrier. Subject to all qualifications of this Paragraph 9,
Landlord waives its rights as specified in this Paragraph 9 with respect to any
subtenant that it has approved pursuant to Paragraph 21 but only in exchange for
the written waiver of such rights to be given by such subtenant to Landlord.
Each party shall cause each insurance policy obtained by it to provide that the
insurance company waives all right of recovery by way of subrogation against
either party in connection with any damage covered by any policy.

                     10. LANDLORD'S REPAIRS AND MAINTENANCE

     Landlord shall at Landlord's expense maintain in good repair, reasonable
wear and tear excepted, the structural soundness of the roof, foundations, and
exterior walls of the Building. The term "exterior walls" as used herein shall
not include windows, glass or plate glass, doors, dock bumpers or dock plates,
special store fronts or office entries. Any damage caused by or repairs
necessitated by any act of Tenant or Tenant's Parties may be repaired by
Landlord at Landlord's option and Tenant's expense. Tenant shall immediately
give Landlord written notice of any defect or need of repairs in such components
of the Building after which Landlord shall have a reasonable opportunity and the
right to enter the Premises at all reasonable times to repair same. Landlord's
liability with respect to any defects, repairs, or maintenance for which
Landlord is responsible under any of the provisions of this Lease shall be
limited to the cost of such repairs or maintenance, and there shall be no
abatement of rent and no liability of Landlord by reason of any injury to or
interference with Tenant's business arising from the making of repairs,
alterations or improvements in or to any portion of the Premises or Project or
to fixtures, appurtenances or equipment in the Building, except as provided in
Paragraph 24 AND EXCEPT AS CAUSED BY LANDLORD'S GROSS NEGLIGENCE OR WILLFUL
MISCONDUCT. By taking possession of the Premises, Tenant accepts them as being
in good order, condition and repair and the condition in which Landlord is
obligated to deliver them.

                      11. TENANT'S REPAIRS AND MAINTENANCE

     Tenant shall at all times during the Term at Tenant's expense maintain all
parts of the Premises in a first-class, good, clean and secure condition and
promptly make all necessary repairs and replacements, as REASONABLY determined
by Landlord, including but not limited to, all windows, glass, doors, walls,
including demising walls, and wall finishes, floors and floor covering, heating,
ventilating and air conditioning systems, ceiling insulation, truck doors,
hardware, dock bumpers, dock plates and levelers, plumbing work and fixtures,
downspouts, entries, skylights, smoke hatches, roof vents, electrical and
lighting systems, and fire sprinklers, with materials and workmanship of the
same character, kind and quality as the original. Tenant shall at Tenant's
expense also perform regular removal of trash and debris. If Tenant uses rail
and if required by the railroad company, Tenant agrees to sign a joint
maintenance agreement governing the use of the rail spur, if any. Tenant shall,
at Tenant's own expense, enter into a regularly scheduled preventative
maintenance/service contract with a maintenance contractor for servicing all hot
water, heating and air conditioning systems and equipment within or serving the
Premises. The maintenance contractor and the contract must be REASONABLY
approved by Landlord. The service contract must include all services suggested
by the equipment manufacturer within the operation/maintenance manual and must
become effective and a copy thereof delivered to Landlord within thirty (30)
days after the Term Commencement Date. Landlord may, upon notice to Tenant,
enter into such a service contract on behalf of Tenant or perform the work and
in either case charge Tenant the cost thereof along with a reasonable amount for
Landlord's overhead. Notwithstanding anything to the contrary contained herein,
Tenant shall, at its expense, promptly repair any damage to the Premises or the
Building or Project resulting from or caused by any act of Tenant or Tenant's
Parties.

                                 12. ALTERATIONS

A. Tenant shall not make, or allow to be made, any alterations, physical
additions, improvements or partitions, including without limitation the
attachment of any fixtures or equipment, in, about or to the Premises
("ALTERATIONS") IN EXCESS OF $5,000 TOTAL COST OR WHICH WOULD ALTER THE EXTERIOR
APPEARANCE, PENETRATE THE ROOF OR IMPACT THE STRUCTURAL INTEGRITY OF THE
PREMISES, without obtaining the prior written consent of Landlord, which consent
shall not be unreasonably withheld (ALTERATIONS LESS THAN $5,000 IN TOTAL COST
REQUIRE WRITTEN NOTICE TO LANDLORD, BUT NO CONSENT) with respect to proposed
Alterations which: (a) comply with all applicable Regulations; (b) are, in
Landlord's opinion, compatible with the Project and its mechanical, plumbing,
electrical, heating/ventilation/air conditioning systems; and (c) will not
interfere with the use and occupancy of any other portion of the Building or
Project by any other tenant or its invitees. Specifically, but without limiting
the generality of the foregoing, Landlord shall have the right of written
consent for all plans and specifications for the proposed Alterations,
construction means and methods, all appropriate permits and licenses, any
contractor or subcontractor to be employed on the work of Alterations, and the
time for performance of such work, and may impose rules and regulations for
contractors and subcontractors performing such work. Tenant shall also supply to
Landlord any documents and information reasonably requested by Landlord in
connection with Landlord's consideration of a request for approval hereunder.
Tenant shall cause all Alterations to be accomplished in a first-class BUT NOT
HIGHER QUALITY THAN EXISTING ALTERATIONS, good and workmanlike manner, and to
comply with all applicable Regulations. Tenant shall at Tenant's sole expense,
perform any additional work required under applicable Regulations due to the
Alterations hereunder. No consent by Landlord to any proposed Alteration or
additional work shall constitute a waiver of Tenant's obligations under this
Paragraph 12. Tenant shall reimburse Landlord for all REASONABLE costs which
Landlord may incur in connection with granting approval to Tenant for any such
Alterations, including any REASONABLE costs or expenses which Landlord may incur
in electing to have outside architects and engineers review said plans and
specifications. All such Alterations shall remain the property of Tenant until
the expiration or earlier termination of this Lease, at which time they shall be
and become the property of Landlord if Landlord so elects; provided, however,
that Landlord may, at Landlord's option, require that Tenant, at Tenant's
expense, remove any or all Alterations made by Tenant and restore the Premises
by the expiration or earlier termination of this Lease, to their condition
existing prior to the construction of any such Alterations. All such removals
and restoration shall be accomplished in a good and workmanlike manner so as not
to cause any damage to the Premises or Project whatsoever. If Tenant fails to
remove such Alterations or Tenant's trade fixtures or furniture, Landlord may
keep and use them or remove any of them and cause them to be stored or sold in
accordance with applicable law, at Tenant's sole expense. In addition to and
wholly apart from Tenant's obligation to pay Tenant's Proportionate Share of
Operating Expenses, Tenant shall be responsible for and shall pay prior to
delinquency any taxes or governmental service fees, possessory interest taxes,
fees or charges in lieu of any such taxes, capital levies, or other charges
imposed upon, levied with respect to or assessed against its personal property,
on the value of Alterations within the Premises, and on Tenant's interest
pursuant to this Lease, or any increase in any of the foregoing based on such
Alterations. To the extent that any such taxes are not separately assessed or
billed to Tenant, Tenant shall pay the amount thereof as invoiced to Tenant by
Landlord.

B. In compliance with Paragraph 27 hereof, at least ten (10) business days
before beginning construction of any Alteration, Tenant shall give Landlord
written notice of the expected commencement date of that construction to permit
Landlord to post and record a notice of non-responsibility. Upon substantial
completion of construction, Tenant shall cause a timely notice of completion to
be recorded in the office of the recorder of the county in which the Building is
located.

                                    13. SIGNS

All signs, notices and graphics of every kind or character, visible in or from
public view or corridors, the common areas or the exterior of the Premises,
shall be subject to Landlord's prior written approval, which Landlord shall have
the right to withhold in its absolute and


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sole discretion. Tenant shall not place or maintain any banners whatsoever or
any window decor in or on any exterior window or window fronting upon any common
areas or service area or upon any truck doors or man doors without Landlord's
prior written approval which Landlord shall have the right to withhold in its
absolute and sole discretion. Any installation of signs or graphics on or about
the Premises or Project shall be subject to any Regulations and to any other
requirements imposed by Landlord. Tenant shall remove all such signs or graphics
by the termination of this Lease. Such installations and removals shall be made
in such manner as to avoid injury to or defacement of the Premises, Building or
Project and any other improvements contained therein, and Tenant shall repair
any injury or defacement including without limitation discoloration caused by
such installation or removal.

                         14. INSPECTION/POSTING NOTICES

After reasonable notice, except in emergencies where no such notice shall be
required, Landlord and Landlord's agents and representatives, shall have the
right to enter the Premises to inspect the same, to clean, to perform such work
as may be permitted or required hereunder, to make repairs or alterations to the
Premises or Project or to other tenant spaces therein, to deal with emergencies,
to post such notices as may be permitted or required by law to prevent the
perfection of liens against Landlord's interest in the Project or to exhibit the
Premises to prospective tenants, purchasers, encumbrancers or to others, or for
any other purpose as Landlord may deem necessary or desirable; provided,
however, that Landlord shall use reasonable efforts not to unreasonably
interfere with Tenant's business operations. Tenant shall not be entitled to any
abatement of Rent by reason of the exercise of any such right of entry. At any
time within six (6) months prior to the expiration of the Term or following any
earlier termination of this Lease or agreement to terminate this Lease, Landlord
shall have the right to erect on the Premises and/or Project a suitable sign
indicating that the Premises are available for lease.

                                  15. UTILITIES

Tenant shall pay directly for all water, gas, heat, air conditioning, light,
power, telephone, sewer, sprinkler charges and other utilities and services used
on or from the Premises, together with any taxes, penalties, surcharges or the
like pertaining thereto, and maintenance charges for utilities and shall furnish
all REPLACEMENT electric light bulbs, ballasts and tubes. If any such services
are not separately metered to Tenant, Tenant shall pay a proportion, as
determined by Landlord, of all charges jointly serving other premises. Landlord
shall not be liable for any damages directly or indirectly resulting from nor
shall the Rent or any monies owed Landlord under this Lease herein reserved be
abated by reason of: (a) the installation, use or interruption of use of any
equipment used in connection with the furnishing of any such utilities or
services; (b) the failure to furnish or delay in furnishing any such utilities
or services when such failure or delay is caused by acts of God or the elements,
labor disturbances of any character, or any other accidents or other conditions
beyond the reasonable control of Landlord; or (c) the limitation, curtailment,
rationing or restriction on use of water, electricity, gas or any other form of
energy or any other service or utility whatsoever serving the Premises or
Project. Landlord shall be entitled to cooperate voluntarily and in a reasonable
manner with the efforts of national, state or local governmental agencies or
utility suppliers in reducing energy or other resource consumption. The
obligation to make services available hereunder shall be subject to the
limitations of any such voluntary, reasonable program.

                                16. SUBORDINATION

Without the necessity of any additional document being executed by Tenant for
the purpose of effecting a subordination, the Lease shall be subject and
subordinate at all times to: (a) all ground leases or underlying leases which
may now exist or hereafter be executed affecting the Premises and/or the land
upon which the Premises and Project are situated, or both; and (b) any mortgage
or deed of trust which may now exist or be placed upon the Building, the Project
and/or the land upon which the Premises or the Project are situated, or said
ground leases or underlying leases, or Landlord's interest or estate in any of
said items which is specified as security. Notwithstanding the foregoing,
Landlord shall have the right to subordinate or cause to be subordinated any
such ground leases or underlying leases or any such liens to this Lease. In the
event that any ground lease or underlying lease terminates for any reason or any
mortgage or deed of trust is foreclosed or a conveyance in lieu of foreclosure
is made for any reason, Tenant shall, notwithstanding any subordination, attorn
to and become the Tenant of the successor in interest to Landlord and Tenant
shall not be disturbed in its possession under this Lease by such successor in
interest so long as Tenant is not in default under this Lease. Within ten (10)
days after request by Landlord, Tenant shall execute and deliver any additional
REASONABLE documents evidencing Tenant's attornment or the subordination of this
Lease with respect to any such ground leases or underlying leases or any such
mortgage or deed of trust, in the form requested by Landlord or by any ground
landlord, mortgagee, or beneficiary under a deed of trust, subject to such
nondisturbance requirement.

                            17. FINANCIAL STATEMENTS

RECOGNIZING THAT TENANT IS A WHOLLY OWNED SUBSIDIARY AND ALL FINANCIAL
STATEMENTS WOULD BE CONSOLIDATED UNDER THE HEADING OF WHOLLY OWNED SUBSIDIARY AS
NAMED IN THIS LEASE, At the request of Landlord from time to time, Tenant shall
provide to Landlord Tenant's and any guarantor's current financial statements or
other information discussing financial worth of Tenant and any guarantor, which
Landlord shall use solely for purposes of this Lease and in connection with the
ownership, management, financing and disposition of the Project.

                            18. ESTOPPEL CERTIFICATE

Tenant agrees from time to time, within ten (10) days after request of Landlord,
to deliver to Landlord, or Landlord's designee, an estoppel certificate stating
that this Lease is in full force and effect, that this Lease has not been
modified (or stating all modifications, written or oral, to this Lease), the
date to which Rent has been paid, the unexpired portion of this Lease, that TO
TENANT'S KNOWLEDGE there are no current defaults by Landlord or Tenant under
this Lease (or specifying any such defaults), and such other matters pertaining
to this Lease as may be reasonably requested by Landlord. Failure by Tenant to
execute and deliver such certificate shall constitute an acceptance of the
Premises and acknowledgment by Tenant that the statements included are true and
correct without exception. Tenant agrees that if Tenant fails to execute and
deliver such certificate within such ten (10) day period, Landlord may execute
and deliver such certificate on Tenant's behalf and that such certificate shall
be binding on Tenant. Landlord and Tenant intend that any statement delivered
pursuant to this Paragraph may be relied upon by any mortgagee, beneficiary,
purchaser or prospective purchaser of the Project or any interest therein. The
parties agree that Tenant's obligation to furnish such estoppel certificates in
a timely fashion is a material inducement for Landlord's execution of the Lease,
and shall be an event of default if Tenant fails to fully comply or makes any
material misstatement in any such certificate.

                              19. SECURITY DEPOSIT

Tenant agrees to deposit with Landlord upon execution of this Lease, a Security
Deposit as stated in the Basic Lease Information, which sum shall be held by
Landlord, without obligation to pay interest, as security for the performance of
Tenant's covenants and obligations under this Lease. The Security Deposit is not
an advance rental deposit or a measure of damages incurred by Landlord in case
of Tenant's default. Upon the occurrence of any event of default by Tenant,
Landlord may from time to time, without prejudice to any other remedy provided
herein or provided by law, use such fund to the extent necessary to make good
any arrears of Rent or other payments

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due to Landlord hereunder, and any other damage, injury, expense or liability
caused by such event of default, and Tenant shall pay to Landlord, on demand,
the amount so applied in order to restore the Security Deposit to its original
amount. Although the Security Deposit shall be deemed the property of Landlord,
any remaining balance of such deposit shall be returned by Landlord to Tenant at
such time after termination of this Lease that all of Tenant's obligations under
this Lease have been fulfilled. Landlord may use and commingle the Security
Deposit with other funds of Landlord.

                              20. TENANT'S REMEDIES

The obligations and liability of Landlord to Tenant for any default by Landlord
under the terms of this Lease are not personal obligations of Landlord or of the
individual or other partners of Landlord or its or their partners, directors,
officers, or shareholders, and Tenant agrees to look solely to Landlord's
interest in the Project for the recovery of any amount from Landlord, and shall
not look to other assets of Landlord nor seek recourse against the assets of the
individual or other partners of Landlord or its or their partners, directors,
officers or shareholders. Any lien obtained to enforce any such judgment and any
levy of execution thereon shall be subject and subordinate to any lien, mortgage
or deed of trust on the Project.

                          21. ASSIGNMENT AND SUBLETTING

A.   (1) GENERAL. Tenant shall not assign or pledge this Lease or sublet the
     Premises or any part thereof, whether voluntarily or by operation of law,
     or permit the use or occupancy of the Premises or any part thereof by
     anyone other than Tenant, or suffer or permit any such assignment, pledge,
     subleasing or occupancy, without Landlord's prior written consent except as
     provided herein. If Tenant desires to assign this Lease or sublet any or
     all of the Premises, Tenant shall give Landlord written notice (the
     "TRANSFER NOTICE") at least FORTY-FIVE (45) days prior to the anticipated
     effective date of the proposed assignment or sublease, which shall contain
     all of the information reasonably requested by Landlord to address
     Landlord's decision criteria specified hereinafter. Landlord shall then
     have a period of thirty (30) days following receipt of the Transfer Notice
     to notify Tenant in writing that Landlord elects either: (1) to terminate
     this Lease as to the space so affected as of the date so requested by
     Tenant; or (2) to consent to the proposed assignment or sublease, subject,
     however, to Landlord's prior written consent of the proposed assignee or
     subtenant and of any related documents or agreements associated with the
     assignment or sublease. If Landlord should fail to notify Tenant in writing
     of such election within said period, Landlord shall be deemed to have
     waived option (1) above, but written consent by Landlord of the proposed
     assignee or subtenant shall be required. If Landlord does not exercise
     option (1) above, Landlord's consent to a proposed assignment or sublet
     shall not be unreasonably withheld OR DELAYED.

     (2) CONDITIONS OF LANDLORD'S CONSENT. Without limiting the other instances
     in which it may be reasonable for Landlord to withhold Landlord's consent
     to an assignment or subletting, Landlord and Tenant acknowledge that it
     shall be reasonable for Landlord to withhold Landlord's consent in the
     following instances: the use of the Premises by such proposed assignee or
     subtenant would not be a Permitted Use or would violate any exclusivity
     arrangement which Landlord has with any other tenant or occupant or would
     increase the Parking Density of the Building or Project; the proposed
     assignee or subtenant is not of sound financial condition as determined by
     Landlord in Landlord's REASONABLE sole discretion; the proposed assignee or
     subtenant is a governmental agency; the proposed assignee or subtenant does
     not have a good reputation as a tenant of property; the proposed assignee
     or subtenant is a person with whom Landlord is negotiating to lease space
     in the Project or is a present tenant of the Project ; the assignment or
     subletting would entail any Alterations which would lessen the value of the
     leasehold improvements in the Premises; or Tenant is in default of any
     obligation of Tenant under this Lease, or Tenant has defaulted under this
     Lease on three (3) or more occasions during any twelve (12) months
     preceding the date that Tenant shall request consent. Failure by Landlord
     to consent to a proposed assignee or subtenant shall not cause a
     termination of this Lease. Upon a termination under Paragraph 21.A.(1),
     Landlord may lease the Premises to any party, including parties with whom
     Tenant has negotiated an assignment or sublease, without incurring any
     liability to Tenant. At the option of Landlord, a surrender and termination
     of this Lease shall operate as an assignment to Landlord of some or all
     subleases or subtenancies. Landlord shall exercise this option by giving
     notice of that assignment to such subtenants on or before the effective
     date of the surrender and termination.

B.   BONUS RENT. Any Rent or other consideration realized by Tenant under any
such sublease or assignment in excess of the Rent payable hereunder, after
amortization of a reasonable brokerage commission AND LEASING EXPENSE incurred
by Tenant, shall be divided and paid, ten percent (10%) to Tenant, ninety
percent (90%) to Landlord. In any subletting or assignment undertaken by Tenant,
Tenant shall diligently seek to obtain the maximum rental amount available in
the marketplace for comparable space available for primary leasing.

C.   CORPORATION. If Tenant is a corporation, a transfer of corporate shares by
sale, assignment, bequest, inheritance, operation of law or other disposition
(including such a transfer to or by a receiver or trustee in federal or state
bankruptcy, insolvency or other proceedings) resulting in a change in the
present control of such corporation or any of its parent corporations by the
person or persons owning a majority of said corporate shares, shall constitute
an assignment for purposes of this Lease.

D.   UNINCORPORATED ENTITY. If Tenant is a partnership, joint venture,
unincorporated limited liability company or other unincorporated business form,
a transfer of the interest of persons, firms or entities responsible for
managerial control of Tenant by sale, assignment, bequest, inheritance,
operation of law or other disposition, so as to result in a change in the
present control of said entity and/or a change in the identity of the persons
respons