Document:

Exhibit (d3)

                             FIFTH AMENDMENT TO THE
                              CAPITOL BANCORP LTD.
                          EMPLOYEE STOCK OWNERSHIP PLAN

     The Capitol Bancorp Ltd. Employee Stock Ownership Plan is hereby amended
effective January 1, 2000 by adding the following participating employer at the
end of the list therein contained:

       Name of                  Type of          State of           Date of
       Employer                 Entity         Organization      Participation
       --------                 ------         ------------      -------------

Elkhart Community Bank        Banking Corp.      Indiana          Jan. 1, 2000

                                            CAPITOL BANCORP LIMITED

Dated: July 1, 2000                         By: /s/ Joseph D. Reid
                                                ----------------------------
                                                Joseph D. Reid
                                                Chairman and CEO

                                            ELKHART COMMUNITY BANK

Dated: July 1, 2000                         By: /s/ Steven L. Brown
                                                ----------------------------
                                                Steven L. Brown
                                                President<PAGE>   1
                                                                    EXHIBIT 10.1

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

                           NINTH AMENDED AND RESTATED

                        AGREEMENT OF LIMITED PARTNERSHIP

                                       OF

                              AMB PROPERTY II, L.P.

             -----------------------------------------------------
<PAGE>   2

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                                                                                                               PAGE
<S>     <C>                                                                                                    <C>
ARTICLE 1. DEFINED TERMS AND RULES OF CONSTRUCTION................................................................2

   Section 1.1.   Definitions.....................................................................................2

ARTICLE 2. ORGANIZATIONAL MATTERS................................................................................22

   Section 2.1.   Organization...................................................................................22
   Section 2.2.   Name...........................................................................................22
   Section 2.3.   Resident Agent; Principal Office...............................................................22
   Section 2.4.   Power of Attorney..............................................................................23
   Section 2.5.   Term...........................................................................................24
   Section 2.6.   Number of Partners.............................................................................24

ARTICLE 3. PURPOSE...............................................................................................24

   Section 3.1.   Purpose and Business...........................................................................24
   Section 3.2.   Powers.........................................................................................25
   Section 3.3.   Partnership Only for Purposes Specified........................................................25
   Section 3.4.   Representations and Warranties by the Parties..................................................25
   Section 3.5.   Certain ERISA Matters..........................................................................27

ARTICLE 4. CAPITAL CONTRIBUTIONS.................................................................................28

   Section 4.1.   Capital Contributions of the Partners..........................................................28
   Section 4.2.   Loans..........................................................................................28
   Section 4.3.   Additional Funding and Capital Contributions...................................................28
   Section 4.4.   No Preemptive Rights...........................................................................29
   Section 4.5.   Other Contribution Provisions..................................................................29

ARTICLE 5. DISTRIBUTIONS.........................................................................................29

   Section 5.1.   Requirement and Characterization of Distributions..............................................29
   Section 5.2.   Distributions in Kind..........................................................................30
   Section 5.3.   Distributions Upon Liquidation.................................................................31
   Section 5.4.   Distributions to Reflect Issuance of Additional Partnership Interests..........................31

ARTICLE 6. ALLOCATIONS...........................................................................................31

   Section 6.1.   Timing and Amount of Allocations of Net Income and Net Loss....................................31
   Section 6.2.   General Allocations............................................................................31
   Section 6.3.   Additional Allocation Provisions...............................................................33
   Section 6.4.   Tax Allocations................................................................................35

ARTICLE 7. MANAGEMENT AND OPERATIONS OF BUSINESS.................................................................36

   Section 7.1.   Management.....................................................................................36
   Section 7.2.   Certificate of Limited Partnership.............................................................39
   Section 7.3.   Restrictions on General Partner's Authority....................................................40
   Section 7.4.   Reimbursement of the General Partner...........................................................42
   Section 7.5.   Outside Activities of the General Partner......................................................43
   Section 7.6.   Employee Benefit Plans.........................................................................43
   Section 7.7.   Indemnification................................................................................43
   Section 7.8.   Liability of the General Partner...............................................................45
   Section 7.9.   Other Matters Concerning the General Partner...................................................46
   Section 7.10.  Title to Partnership Assets....................................................................47
   Section 7.11.  Reliance by Third Parties......................................................................47

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<S>               <C>                                                                                           <C>
ARTICLE 8. RIGHTS AND OBLIGATIONS OF LIMITED PARTNERS............................................................48
   Section 8.1.   Limitation of Liability........................................................................48
   Section 8.2.   Management of Business.........................................................................48
   Section 8.3.   Outside Activities of Limited Partners.........................................................48
   Section 8.4.   Return of Capital..............................................................................48
   Section 8.5.   Rights of Limited Partners Relating to the Partnership.........................................49

ARTICLE 9. BOOKS, RECORDS, ACCOUNTING AND REPORTS................................................................51

   Section 9.1.   Records and Accounting.........................................................................51
   Section 9.2.   Fiscal Year....................................................................................51
   Section 9.3.   Reports........................................................................................51
   Section 9.4.   Nondisclosure of Certain Information...........................................................51

ARTICLE 10. TAX MATTERS..........................................................................................52

   Section 10.1.     Preparation of Tax Returns..................................................................52
   Section 10.2.     Tax Elections...............................................................................52
   Section 10.3.     Tax Matters Partner.........................................................................52
   Section 10.4.     Organizational Expenses.....................................................................53
   Section 10.5.     Withholding.................................................................................54

ARTICLE 11. TRANSFERS AND WITHDRAWALS............................................................................54

   Section 11.1.     Transfer....................................................................................54
   Section 11.2.     Transfer of General Partner's and Common Limited Partner's Partnership Interest.............55
   Section 11.3.     Preferred Limited Partners' Rights to Transfer..............................................55
   Section 11.4.     Substituted Limited Partners................................................................57
   Section 11.5.     Assignees...................................................................................58
   Section 11.6.     General Provisions..........................................................................58

ARTICLE 12. ADMISSION OF PARTNERS................................................................................61

   Section 12.1.     Admission of Successor General Partner......................................................61
   Section 12.2.     Admission of Additional Limited Partners....................................................61
   Section 12.3.     Amendment of Agreement and Certificate of Limited Partnership...............................62

ARTICLE 13. DISSOLUTION AND LIQUIDATION..........................................................................62

   Section 13.1.     Dissolution.................................................................................62
   Section 13.2.     Winding Up..................................................................................63
   Section 13.3.     Compliance with Timing Requirements of Regulations..........................................64
   Section 13.4.     Deemed Distribution and Recontribution......................................................65
   Section 13.5.     Rights of Limited Partners..................................................................65
   Section 13.6.     Notice of Dissolution.......................................................................65
   Section 13.7.     Cancellation of Certificate of Limited Partnership..........................................65
   Section 13.8.     Reasonable Time for Winding-Up..............................................................66
   Section 13.9.     Waiver of Partition.........................................................................66

ARTICLE 14. AMENDMENT OF PARTNERSHIP AGREEMENT; CONSENTS.........................................................66

   Section 14.1.     Amendments..................................................................................66
   Section 14.2.     Action by the Partners......................................................................66

ARTICLE 15. GENERAL PROVISIONS...................................................................................67

   Section 15.1.     Addresses and Notice........................................................................67
   Section 15.2.     Titles and Captions.........................................................................67
   Section 15.3.     Pronouns and Plurals........................................................................67
   Section 15.4.     Further Action..............................................................................68
   Section 15.5.     Binding Effect..............................................................................68
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<S>                   <C>                                                                                        <C>
   Section 15.6.     Creditors...................................................................................68
   Section 15.7.     Waiver......................................................................................68
   Section 15.8.     Counterparts................................................................................68
   Section 15.9.     Applicable Law..............................................................................68
   Section 15.10.    Invalidity of Provisions....................................................................68
   Section 15.11.    Entire Agreement............................................................................68
   Section 15.12.    No Rights as Stockholders...................................................................69

ARTICLE 16. SERIES C PREFERRED UNITS.............................................................................69

   Section 16.1.     Designation and Number......................................................................69
   Section 16.2.     Ranking.....................................................................................69
   Section 16.3.     Distributions...............................................................................69
   Section 16.4.     Liquidation Proceeds........................................................................71
   Section 16.5.     Series C Redemption.........................................................................72
   Section 16.6.     Voting Rights...............................................................................73
   Section 16.7.     Transfer Restrictions.......................................................................74
   Section 16.8.     Exchange Rights.............................................................................75
   Section 16.9.     No Conversion Rights........................................................................79
   Section 16.10.    No Sinking Fund.............................................................................79

ARTICLE 17. SERIES D PREFERRED UNITS.............................................................................80

   Section 17.1.     Designation and Number......................................................................80
   Section 17.2.     Ranking.....................................................................................80
   Section 17.3.     Distributions...............................................................................80
   Section 17.4.     Liquidation Proceeds........................................................................82
   Section 17.5.     Series D Redemption.........................................................................82
   Section 17.6.     Voting and Certain Management Rights........................................................84
   Section 17.7.     Transfer Restrictions.......................................................................86
   Section 17.8.     Exchange Rights.............................................................................87
   Section 17.9.     No Conversion Rights........................................................................91
   Section 17.10.    No Sinking Fund.............................................................................91

ARTICLE 18. SERIES E PREFERRED UNITS.............................................................................91

   Section 18.1.     Designation and Number......................................................................91
   Section 18.2.     Ranking.....................................................................................91
   Section 18.3.     Distributions...............................................................................92
   Section 18.4.     Liquidation Proceeds........................................................................94
   Section 18.5.     Series E Redemption.........................................................................94
   Section 18.6.     Voting and Certain Management Rights........................................................96
   Section 18.7.     Transfer Restrictions.......................................................................98
   Section 18.8.     Exchange Rights.............................................................................98
   Section 18.9.     No Conversion Rights.......................................................................103
   Section 18.10.    No Sinking Fund............................................................................103

ARTICLE 19. SERIES F PREFERRED UNITS............................................................................103

   Section 19.1.     Designation and Number.....................................................................103
   Section 19.2.     Ranking....................................................................................103
   Section 19.3.     Distributions..............................................................................103
   Section 19.4.     Liquidation Proceeds.......................................................................105
   Section 19.5.     Series F Redemption........................................................................106
   Section 19.6.     Voting and Certain Management Rights.......................................................107
   Section 19.7.     Transfer Restrictions......................................................................109
   Section 19.8.     Exchange Rights............................................................................110
   Section 19.9.     No Conversion Rights.......................................................................115
   Section 19.10.    No Sinking Fund............................................................................115
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<S>         <C>                                                                                                 <C>
ARTICLE 20. SERIES G PREFERRED UNITS............................................................................115

   Section 20.1.     Designation and Number.....................................................................115
   Section 20.2.     Ranking....................................................................................115
   Section 20.3.     Distributions..............................................................................116
   Section 20.4.     Liquidation Proceeds.......................................................................118
   Section 20.5.     Series G Redemption........................................................................118
   Section 20.6.     Voting and Certain Management Rights.......................................................120
   Section 20.7.     Transfer Restrictions......................................................................122
   Section 20.8.     Exchange Rights............................................................................122
   Section 20.9.     No Conversion Rights.......................................................................127
   Section 20.10.    No Sinking Fund............................................................................127

ARTICLE 21. SERIES H PREFERRED UNITS............................................................................128

   Section 21.1.     Designation and Number.....................................................................128
   Section 21.2.     Ranking....................................................................................128
   Section 21.3.     Distributions..............................................................................128
   Section 21.4.     Liquidation Proceeds.......................................................................130
   Section 21.5.     Series H Redemption........................................................................130
   Section 21.6.     Voting and Certain Management Rights.......................................................132
   Section 21.7.     Transfer Restrictions......................................................................134
   Section 21.8.     Exchange Rights............................................................................135
   Section 21.9.     No Conversion Rights.......................................................................139
   Section 21.10.    No Sinking Fund............................................................................139

ARTICLE 22. SERIES I PREFERRED UNITS............................................................................139

   Section 22.1.     Designation and Number.....................................................................139
   Section 22.2.     Ranking....................................................................................140
   Section 22.3.     Distributions..............................................................................140
   Section 22.4.     Liquidation Proceeds.......................................................................142
   Section 22.5.     Series I Redemption........................................................................142
   Section 22.6.     Voting and Certain Management Rights.......................................................144
   Section 22.7.     Transfer Restrictions......................................................................146
   Section 22.8.     Exchange Rights............................................................................146
   Section 22.9.     No Conversion Rights.......................................................................151
   Section 22.10.    No Sinking Fund............................................................................151
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<PAGE>   6

                           NINTH AMENDED AND RESTATED

                        AGREEMENT OF LIMITED PARTNERSHIP

                                       OF

                              AMB PROPERTY II, L.P.

         THIS NINTH AMENDED AND RESTATED AGREEMENT OF LIMITED PARTNERSHIP, dated
as of March 21, 2001, is entered into by and among AMB Property Holding
Corporation, a Maryland corporation (the "Company"), as the General Partner, and
the Persons whose names are set forth on Exhibit A attached hereto, as the
Limited Partners (the "Existing Limited Partners"), together with any other
Persons who become Partners in the Partnership as provided herein.

                  WHEREAS, the General Partner and the Existing Limited Partners
are parties to that certain Seventh Amended and Restated Agreement of Limited
Partnership, dated August 29, 2000, as amended;

                  WHEREAS, on November 24, 1998, Belcrest Realty Corporation, a
Delaware corporation and Belair Real Estate Corporation, a Delaware corporation
(each a "Contributor" and, together the "Contributors") made an aggregate
Capital Contribution of $110,000,000, in cash, to the Partnership in exchange
for which the Contributors received an aggregate of 2,200,000 Series C Preferred
Units in the Partnership;

                  WHEREAS, on May 5, 1999, J.P. Morgan Mosaic Fund, LLC, a
Delaware limited liability company (the "Series D Contributor") made a Capital
Contribution of $79,766,850, in cash, to the Partnership in exchange for which
the Series D Contributor received 1,595,337 Series D Preferred Units in the
Partnership;

                  WHEREAS, on August 31, 1999, Fifth Third Equity Exchange Fund
1999, LLC, a Delaware limited liability company (the "Series E Contributor")
made a Capital Contribution of $11,022,000, in cash, to the Partnership in
exchange for which the Series E Contributor received 220,440 Series E Preferred
Units in the Partnership;

                  WHEREAS, on March 22, 2000, Bailard, Biehl & Kaiser Technology
Exchange Fund, LLC, a Delaware limited liability company (the "Series F
Contributor") made a Capital Contribution of $19,871,950, in cash, to the
Partnership in exchange for which the Series F Contributor received 397,439
Series F Preferred Units in the Partnership;

                  WHEREAS, on August 29, 2000, Bailard, Biehl & Kaiser
Technology Exchange Fund, LLC, a Delaware limited liability company (the "Series
G Contributor") made a Capital Contribution of $1,000,000, in cash, to the
Partnership in exchange for which the Series G Contributor received 20,000
Series G Preferred Units in the Partnership;

                  WHEREAS, on September 1, 2000, J.P. Morgan Mosaic Fund IV,
LLC, a Delaware limited liability company (the "Series H Contributor") made a
Capital Contribution of

<PAGE>   7

$42,000,000, in cash, to the Partnership in exchange for which the Series H
Contributor received 840,000 Series H Preferred Units in the Partnership;

                  WHEREAS, pursuant to Section 4.3.B of the Partnership
Agreement, the General Partner may, in its sole and absolute discretion subject
to Delaware law, in connection with any Capital Contribution, issue additional
Partnership Interests in one or more classes, or one or more series of any such
classes, with such designations, preferences and relative, participating,
optional or other special rights, powers, and duties, including rights, powers,
and duties senior to then existing Limited Partnership Interests;

                  WHEREAS, on the date hereof, J.P. Morgan Chase Mosaic Fund V,
LLC, a Delaware limited liability company (the "Series I Contributor") has made
a Capital Contribution of $25,500,000, in cash, to the Partnership in exchange
for which the Series I Contributor is entitled to receive an aggregate of 8.00%
Series I Preferred Units in the Partnership with the rights, preferences,
exchange and other rights, voting powers and restrictions, limitations as to
distributions, qualifications and terms and conditions as set forth herein;

                  WHEREAS, pursuant to the authority granted to the General
Partner under the Partnership Agreement, the General Partner desires to amend
and restate the Partnership Agreement to reflect (i) the issuance of the Series
I Preferred Units, (ii) the admission of the Series I Contributor as an
Additional Limited Partner and a holder of a certain number of Series I
Preferred Units and (iii) certain other matters described herein;

                  WHEREAS, the Series I Contributor desires to become a party to
the Partnership Agreement as a Limited Partner and to be bound by all terms,
conditions and other provisions of the Partnership Agreement; and

                  WHEREAS, by virtue of the execution of this Agreement by the
Company in its capacity as General Partner of the Partnership, the General
Partner hereby consents to the amendment and restatement of the Eighth Amended
and Restated Agreement of Limited Partnership.

                  NOW, THEREFORE, for good and adequate consideration, the
receipt of which is hereby acknowledged, the parties hereto agree as follows:

                                   ARTICLE 1.
                     DEFINED TERMS AND RULES OF CONSTRUCTION

                  Section 1.1. Definitions

                  The following definitions shall be for all purposes, unless
otherwise clearly indicated to the contrary, applied to the terms used in this
Agreement.

                  "Act" means the Delaware Revised Uniform Limited Partnership
Act, as it may be amended from time to time, and any successor to such statute.

                  "Additional Funds" shall have the meaning set forth in Section
4.3.A.

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<PAGE>   8

                  "Additional Limited Partner" means a Person admitted to the
Partnership as a Limited Partner pursuant to Section 12.2 and who is shown as
such on the books and records of the Partnership.

                  "Adjusted Capital Account Deficit" means, with respect to any
Partner, the deficit balance, if any, in such Partner's Capital Account as of
the end of the relevant fiscal year, after giving effect to the following
adjustments:

                  (i)      decrease such deficit by any amounts which such
                           Partner is obligated to restore pursuant to this
                           Agreement or is deemed to be obligated to restore
                           pursuant to Regulations Section 1.704-1(b)(2)(ii)(c)
                           or the penultimate sentence of each of Regulations
                           Sections 1.704-2(i)(5) and 1.704-2(g); and

                  (ii)     increase such deficit by the items described in
                           Regulations Section 1.704-1(b)(2)(ii)(d)(4), (5) and
                           (6).

                  The foregoing definition of Adjusted Capital Account Deficit
is intended to comply with the provisions of Regulations Section
1.704-1(b)(2)(ii)(d) and shall be interpreted consistently therewith.

                  "Adjustment Date" shall have the meaning set forth in Section
4.3.D.

                  "Affiliate" means, with respect to any Person, any Person
directly or indirectly controlling, controlled by or under common control with
such Person.

                  "Agreed Value" means (i) in the case of any Contributed
Property set forth in Exhibit A and as of the time of its contribution to the
Partnership, the Agreed Value of such property as set forth in Exhibit A; (ii)
in the case of any Contributed Property not set forth in Exhibit A and as of the
time of its contribution to the Partnership, the fair market value of such
property or other consideration as determined by the General Partner, reduced by
any liabilities either assumed by the Partnership upon such contribution or to
which such property is subject when contributed; and (iii) in the case of any
property distributed to a Partner by the Partnership, the fair market value of
such property as determined by the General Partner at the time such property is
distributed, reduced by any indebtedness either assumed by such Partner upon
such distribution or to which such property is subject at the time of the
distribution as determined under Section 752 of the Code and the Regulations
thereunder.

                  "Agreement" means this Ninth Amended and Restated Agreement of
Limited Partnership, as it may be amended, modified, supplemented or restated
from time to time.

                  "AMB" means AMB Property Corporation, a Maryland corporation,
in its capacity as the owner of 100% of the common stock of the General Partner
and as the sole general partner of the Operating Partnership.

                  "Appraisal" means with respect to any assets, the opinion of
an independent third party experienced in the valuation of similar assets,
selected by the General Partner in good faith;

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<PAGE>   9

such opinion may be in the form of an opinion by such independent third party
that the value for such asset as set by the General Partner is fair, from a
financial point of view, to the Partnership.

                  "Assignee" means a Person to whom one or more Partnership
Units have been transferred in a manner permitted under this Agreement, but who
has not become a Substituted Limited Partner, and who has the rights set forth
in Section 11.5.

                  "Available Cash" means, with respect to any period for which
such calculation is being made, (i) the sum of:

                           (a) the Partnership's Net Income or Net Loss (as the
                  case may be) for such period,

                           (b) Depreciation and all other noncash charges
                  deducted in determining Net Income or Net Loss for such
                  period,

                           (c) the amount of any reduction in reserves of the
                  Partnership referred to in clause (ii)(f) below (including,
                  without limitation, reductions resulting because the General
                  Partner determines such amounts are no longer necessary),

                           (d) the excess of the net proceeds from the sale,
                  exchange, disposition, or refinancing of Partnership property
                  for such period over the gain (or loss, as the case may be)
                  recognized from any such sale, exchange, disposition, or
                  refinancing during such period, and

                           (e) all other cash received by the Partnership for
                  such period that was not included in determining Net Income or
                  Net Loss for such period;

                  (ii)     less the sum of:

                           (a) all principal debt payments made during such
                  period by the Partnership,

                           (b) capital expenditures made by the Partnership
                  during such period,

                           (c) investments in any entity (including loans made
                  thereto) to the extent that such investments are not otherwise
                  described in clauses (ii)(a) or (b),

                           (d) all other expenditures and payments not deducted
                  in determining Net Income or Net Loss for such period,

                           (e) any amount included in determining Net Income or
                  Net Loss for such period that was not received by the
                  Partnership during such period,

                           (f) the amount of any increase in reserves
                  established during such period which the General Partner
                  determines are necessary or appropriate in its sole and
                  absolute discretion, and

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<PAGE>   10

                           (g) the amount of any working capital accounts and
                  other cash or similar balances which the General Partner
                  determines to be necessary or appropriate in its sole and
                  absolute discretion.

                  Notwithstanding the foregoing, Available Cash shall not
include any cash received or reductions in reserves, or take into account any
disbursements made or reserves established, after commencement of the
dissolution and liquidation of the Partnership.

                  "Board of Directors" means the Board of Directors of AMB.

                  "Business Day" means each day, other than a Saturday or a
Sunday, which is not a day on which banking institutions in Los Angeles,
California or New York, New York are authorized or required by law, regulation
or executive order to close.

                  "Capital Account" means, with respect to any Partner, the
Capital Account maintained for such Partner in accordance with the following
provisions:

                  (i) To each Partner's Capital Account there shall be added
such Partner's Capital Contributions, such Partner's share of Net Income and any
items in the nature of income or gain which are specially allocated pursuant to
Section 6.3, and the amount of any Partnership liabilities assumed by such
Partner or which are secured by any property distributed to such Partner.

                  (ii) From each Partner's Capital Account there shall be
subtracted the amount of cash and the Gross Asset Value of any property
distributed to such Partner pursuant to any provision of this Agreement, such
Partner's distributive share of Net Losses and any items in the nature of
expenses or losses which are specially allocated pursuant to Section 6.3 hereof,
and the amount of any liabilities of such Partner assumed by the Partnership or
which are secured by any property contributed by such Partner to the
Partnership.

                  (iii) In the event any interest in the Partnership is
transferred in accordance with the terms of this Agreement, the transferee shall
succeed to the Capital Account of the transferor to the extent it relates to the
transferred interest.

                  (iv) In determining the amount of any liability for purposes
of subsections (i) and (ii) hereof, there shall be taken into account Code
Section 752(c) and any other applicable provisions of the Code and Regulations.

                  (v) The foregoing provisions and the other provisions of this
Agreement relating to the maintenance of Capital Accounts are intended to comply
with Regulations Sections 1.704-1(b) and 1.704-2, and shall be interpreted and
applied in a manner consistent with such Regulations. In the event the General
Partner shall determine that it is prudent to modify the manner in which the
Capital Accounts, or any debits or credits thereto (including, without
limitation, debits or credits relating to liabilities which are secured by
contributed or distributed property or which are assumed by the Partnership, the
General Partner, or the Limited Partners) are computed in order to comply with
such Regulations, the General Partner may make such modification; provided that,
it is not likely to have a material effect on the amounts distributable

                                       5
<PAGE>   11

to any Person pursuant to Article 13 of this Agreement upon the dissolution of
the Partnership. The General Partner also shall (a) make any adjustments that
are necessary or appropriate to maintain equality between the Capital Accounts
of the Partners and the amount of Partnership capital reflected on the
Partnership's balance sheet, as computed for book purposes, in accordance with
Regulations Section 1.704-1(b)(2)(iv)(q) and (b) make any appropriate
modifications in the event unanticipated events might otherwise cause this
Agreement not to comply with Regulations Section 1.704-1(b) or Section 1.704-2.

                  "Capital Contribution" means, with respect to any Partner, the
amount of money and the initial Gross Asset Value of any property (other than
money) contributed to the Partnership by such Partner.

                  "Certificate" means the Certificate of Limited Partnership
relating to the Partnership filed in the office of the Secretary of State of
Delaware, as amended from time to time in accordance with the terms hereof and
the Act.

                  "Charter" means the Company's Articles of Incorporation, as
filed with the Maryland Department of Assessments and Taxation on November 24,
1997.

                  "Code" means the Internal Revenue Code of 1986, as amended
from time to time or any successor statute thereto, as interpreted by the
applicable regulations thereunder. Any reference herein to a specific section or
sections of the Code shall be deemed to include a reference to any corresponding
provision of future law.

                  "Common Unit" means each Partnership Unit that is not entitled
to any preference with respect to any other Partnership Unit as to distribution
or voluntary or involuntary liquidation, dissolution or winding up of the
Partnership.

                  "Common Limited Partner" means any Person holding Common
Units, and named as a Common Limited Partner in Exhibit A attached hereto, as
such Exhibit may be amended from time to time, or any Substituted Limited
Partner or Additional Limited Partner, in such Person's capacity as a Common
Limited Partner in the Partnership.

                  "Consent" means the consent to, approval of, or vote on a
proposed action by a Partner given in accordance with Article 14 hereof.

                  "Consent of the Limited Partners" means the Consent of a
Majority in Interest of the Limited Partners, other than the Preferred Limited
Partners, which Consent shall be obtained prior to the taking of any action for
which it is required by this Agreement and may be given or withheld by a
Majority in Interest of the Limited Partners, unless otherwise expressly
provided herein, in their sole and absolute discretion.

                  "Consent of the Partners" means the Consent of Partners, other
than the Preferred Limited Partners, holding Percentage Interests that in the
aggregate are equal to or greater than a majority of the aggregate Percentage
Interests of all Partners, other than the Preferred Limited Partners, which
Consent shall be obtained prior to the taking of any action for which it is

                                       6
<PAGE>   12

required by this Agreement and may be given or withheld by such Partners, in
their sole and absolute discretion.

                  "Constructively Own" means ownership under the constructive
ownership rules described in Exhibit C.

                  "Contributed Property" means each property or other asset, in
such form as may be permitted by the Act, but excluding cash, contributed or
deemed contributed to the Partnership (or, to the extent provided in applicable
regulations, deemed contributed by the Partnership on termination and
reconstitution thereof pursuant to Section 708 of the Code).

                  "Contributor" shall have the meaning given to such term in the
recitals hereto.

                  "Debt" means, as to any Person, as of any date of
determination: (i) all indebtedness of such Person for borrowed money or for the
deferred purchase price of property or services; (ii) all amounts owed by such
Person to banks or other Persons in respect of reimbursement obligations under
letters of credit, surety bonds and other similar instruments guaranteeing
payment or other performance of obligations by such Person; (iii) all
indebtedness for borrowed money or for the deferred purchase price of property
or services secured by any lien on any property owned by such Person, to the
extent attributable to such Person's interest in such property, even though such
Person has not assumed or become liable for the payment thereof; and (iv) lease
obligations of such Person which, in accordance with generally accepted
accounting principles, should be capitalized.

                  "Depreciation" means, for each fiscal year or other period, an
amount equal to the depreciation, amortization or other cost recovery deduction
allowable with respect to an asset for such year or other period, except that if
the Gross Asset Value of an asset differs from its adjusted basis for Federal
income tax purposes at the beginning of such year or other period, Depreciation
shall be an amount which bears the same ratio to such beginning Gross Asset
Value as the Federal income tax depreciation, amortization or other cost
recovery deduction for such year or other period bears to such beginning
adjusted tax basis; provided, however, that if the Federal income tax
depreciation, amortization or other cost recovery deduction for such year is
zero, Depreciation shall be determined with reference to such beginning Gross
Asset Value using any reasonable method selected by the General Partner.

                  "ERISA" means the Employee Retirement Income Security Act of
1974, as amended.

                  "Exchange Act" means the Securities Exchange Act of 1934, as
amended, and the rules and regulations of the Securities and Exchange Commission
promulgated thereunder.

                  "Funding Debt" means the incurrence of any Debt by or on
behalf of the General Partner for the purpose of providing funds to the
Partnership.

                  "Future Parity Preferred Capital" means, with respect to any
series of Parity Preferred Units issued to Future Parity Preferred Unitholders
following the date hereof, the product of (i) the number of Parity Preferred
Units within such series then held by Preferred

                                       7
<PAGE>   13

Limited Partners (other than the General Partner and the Operating Partnership)
and (ii) the sum of the amount contributed to the Partnership per such Parity
Preferred Unit by Preferred Limited Partners and the Preferred Distribution
Shortfall with respect to each such Parity Preferred Unit, if any.

                  "Future Parity Preferred Unitholders" shall have the meaning
set forth in Section 17.6.D.

                  "General Partner" means the Company or its successors as
general partner of the Partnership.

                  "General Partner Interest" means a Partnership Interest held
by the General Partner. A General Partner Interest may be expressed as a number
of Partnership Units.

                  "Gross Asset Value" means, with respect to any asset, the
asset's adjusted basis for Federal income tax purposes, except as follows:

                  (i) The initial Gross Asset Value of any asset contributed by
a Partner to the Partnership shall be the gross fair market value of such asset,
as determined by the contributing Partner and the General Partner (as set forth
on Exhibit A attached hereto, as such Exhibit may be amended from time to time);
provided, that if the contributing Partner is the General Partner then, except
with respect to the General Partner's initial Capital Contribution which shall
be determined as set forth on Exhibit A, or capital contributions of cash, the
determination of the fair market value of the contributed asset shall be
determined by (a) the price paid by the General Partner if the asset is acquired
by the General Partner contemporaneously with its contribution to the
Partnership or (b) by Appraisal if otherwise acquired by the General Partner.

                  (ii) Immediately prior to the times listed below, the Gross
Asset Values of all Partnership assets shall be adjusted to equal their
respective gross fair market values, as determined by the General Partner using
such reasonable method of valuation as it may adopt:

                  (a)      the acquisition of an additional interest in the
                           Partnership by a new or existing Partner in exchange
                           for more than a de minimis Capital Contribution, if
                           the General Partner reasonably determines that such
                           adjustment is necessary or appropriate to reflect the
                           relative economic interests of the Partners in the
                           Partnership;

                  (b)      the distribution by the Partnership to a Partner of
                           more than a de minimis amount of Partnership property
                           as consideration for an interest in the Partnership
                           if the General Partner reasonably determines that
                           such adjustment is necessary or appropriate to
                           reflect the relative economic interests of the
                           Partners in the Partnership;

                  (c)      the liquidation of the Partnership within the meaning
                           of Regulations Section 1.704-1(b)(2)(ii)(g); and

                                       8
<PAGE>   14

                  (d)      at such other times as the General Partner shall
                           reasonably determine necessary or advisable in order
                           to comply with Regulations Sections 1.704-1(b) and
                           1.704-2.

                  (iii) The Gross Asset Value of any Partnership asset
distributed to a Partner shall be the gross fair market value of such asset on
the date of distribution as determined by the distributee and the General
Partner; provided, that if the distributee is the General Partner, or if the
distributee and the General Partner cannot agree on such a determination, by
Appraisal.

                  (iv) The Gross Asset Values of Partnership assets shall be
increased (or decreased) to reflect any adjustments to the adjusted basis of
such assets pursuant to Code Section 734(b) or Code Section 743(b), but only to
the extent that such adjustments are taken into account in determining Capital
Accounts pursuant to Regulations Section 1.704-1(b)(2)(iv)(m); provided,
however, that Gross Asset Values shall not be adjusted pursuant to this
subparagraph (iv) to the extent that the General Partner reasonably determines
that an adjustment pursuant to subparagraph (ii) is necessary or appropriate in
connection with a transaction that would otherwise result in an adjustment
pursuant to this subparagraph (iv).

                  (v) If the Gross Asset Value of a Partnership asset has been
determined or adjusted pursuant to subparagraph (i), (ii) or (iv), such Gross
Asset Value shall thereafter be adjusted by the Depreciation taken into account
with respect to such asset for purposes of computing Net Income and Net Losses.

                  "Holder" means either the Partner or Assignee owning a
Partnership Unit.

                  "Immediate Family" means, with respect to any natural Person,
such natural Person's estate or heirs or current spouse or former spouse,
parents, parents-in-law, children, siblings and grandchildren and any trust or
estate, all of the beneficiaries of which consist of such Person or such
Person's spouse, former spouse, parents, parents-in-law, children, siblings or
grandchildren.

                  "Incapacity" or "Incapacitated" means: (i) as to any
individual Partner, death, total physical disability or entry by a court of
competent jurisdiction adjudicating him or her incompetent to manage his or her
Person or his or her estate; (ii) as to any corporation which is a Partner, the
filing of a certificate of dissolution, or its equivalent, for the corporation
or the revocation of its charter; (iii) as to any partnership which is a
Partner, the dissolution and commencement of winding up of the partnership; (iv)
as to any estate which is a Partner, the distribution by the fiduciary of the
estate's entire interest in the Partnership; (v) as to any trustee of a trust
which is a Partner, the termination of the trust (but not the substitution of a
new trustee); or (vi) as to any Partner, the bankruptcy of such Partner. For
purposes of this definition, bankruptcy of a Partner shall be deemed to have
occurred when (a) the Partner commences a voluntary proceeding seeking
liquidation, reorganization or other relief under any bankruptcy, insolvency or
other similar law now or hereafter in effect, (b) the Partner is adjudged as
bankrupt or insolvent, or a final and nonappealable order for relief under any
bankruptcy, insolvency or similar law now or hereafter in effect has been
entered against the Partner, (c) the Partner executes and delivers a general
assignment for the benefit of the Partner's creditors, (d) the Partner files an
answer or other pleading admitting or failing to contest the material
allegations of

                                       9
<PAGE>   15

a petition filed against the Partner in any proceeding of the nature described
in clause (b) above, (e) the Partner seeks, consents to or acquiesces in the
appointment of a trustee, receiver or liquidator for the Partner or for all or
any substantial part of the Partner's properties, (f) any proceeding seeking
liquidation, reorganization or other relief under any bankruptcy, insolvency or
other similar law now or hereafter in effect has not been dismissed within one
hundred and twenty (120) days after the commencement thereof, (g) the
appointment without the Partner's consent or acquiescence of a trustee, receiver
or liquidator has not been vacated or stayed within ninety (90) days of such
appointment or (h) an appointment referred to in clause (g) is not vacated
within ninety (90) days after the expiration of any such stay.

                  "Indemnitee" means (i) any Person subject to a claim or demand
or made or threatened to be made a party to, or involved or threatened to be
involved in, an action, suit or proceeding by reason of his or her status as (a)
the General Partner or (b) a director, officer, employee or agent of the
Partnership or the General Partner and (ii) such other Persons (including
Affiliates of the General Partner or the Partnership) as the General Partner may
designate from time to time, in its sole and absolute discretion.

                  "IRS" means the Internal Revenue Service, which administers
the internal revenue laws of the United States.

                  "Junior Stock" means shares of capital stock of AMB
representing any class or series of equity interest ranking, as to distributions
and voluntary or involuntary liquidation, dissolution or winding up of AMB,
junior to the Series C Preferred Shares, the Series D Preferred Shares, the
Series E Preferred Shares, the Series F Preferred Shares, the Series G Preferred
Shares, the Series H Preferred Shares and the Series I Preferred Shares.

                  "Junior Units" means Partnership Units representing any class
or series of Partnership Interest ranking, as to distributions and voluntary or
involuntary liquidation, dissolution or winding up of the Partnership, junior to
the Series C Preferred Units, the Series D Preferred Units, the Series E
Preferred Units, the Series F Preferred Units, the Series G Preferred Units, the
Series H Preferred Units and the Series I Preferred Units.

                  "Limited Partner" means any Person named as a Limited Partner
in Exhibit A attached hereto, as such Exhibit may be amended from time to time,
any Substituted Limited Partner or Additional Limited Partner, in such Person's
capacity as a Limited Partner in the Partnership.

                  "Limited Partnership Interest" means a Partnership Interest of
a Limited Partner representing a fractional part of the Partnership Interests of
all Limited Partners and includes any and all benefits to which the holder of
such a Partnership Interest may be entitled as provided in this Agreement,
together with all obligations of such Person to comply with the terms and
provisions of this Agreement. A Limited Partnership Interest may be expressed as
a number of Partnership Units.

                  "Liquidating Events" shall have the meaning set forth in
Section 13.1.

                  "Liquidator" shall have the meaning set forth in Section
13.2.A.

                                       10
<PAGE>   16

                  "Majority in Interest of the Limited Partners" means Limited
Partners (other than any Preferred Limited Partner) holding Percentage Interests
that in the aggregate are greater than fifty percent (50%) of the aggregate
Percentage Interests of all Limited Partners (other than any Preferred Limited
Partner).

                  "Majority in Interest of Partners" means Partners (other than
Preferred Limited Partners) holding Percentage Interests that are greater than
fifty percent (50%) of the aggregate Percentage Interests of all Partners (other
than Preferred Limited Partners).

                  "Net Income" or "Net Loss" means for each fiscal year of the
Partnership, an amount equal to the Partnership's taxable income or loss for
such fiscal year, determined in accordance with Code Section 703(a) (for this
purpose, all items of income, gain, loss or deduction required to be stated
separately pursuant to Code Section 703(a)(1) shall be included in taxable
income or loss), with the following adjustments:

                  (i) Any income of the Partnership that is exempt from Federal
income tax and not otherwise taken into account in computing Net Income or Net
Loss pursuant to this definition of Net Income or Net Loss shall be added to
such taxable income or loss;

                  (ii) Any expenditures of the Partnership described in Code
Section 705(a)(2)(B) or treated as Code Section 705(a)(2)(B) expenditures
pursuant to Regulations Section 1.704-1(b)(2)(iv)(i), and not otherwise taken
into account in computing Net Income or Net Loss pursuant to this definition of
Net Income or Net Loss shall be subtracted from such taxable income or loss;

                  (iii) In the event the Gross Asset Value of any Partnership
asset is adjusted pursuant to subparagraph (ii) or (iii) of the definition of
Gross Asset Value, the amount of such adjustment shall be taken into account as
gain or loss from the disposition of such asset for purposes of computing Net
Income or Net Loss;

                  (iv) Gain or loss resulting from any disposition of property
with respect to which gain or loss is recognized for Federal income tax purposes
shall be computed by reference to the Gross Asset Value of the property disposed
of, notwithstanding that the adjusted tax basis of such property differs from
its Gross Asset Value;

                  (v) In lieu of the depreciation, amortization, and other cost
recovery deductions taken into account in computing such taxable income or loss,
there shall be taken into account Depreciation for such fiscal year;

                  (vi) To the extent an adjustment to the adjusted tax basis of
any Partnership asset pursuant to Code Section 734(b) or Code Section 743(b) is
required pursuant to Regulations Section 1.704-1(b)(2)(iv)(m)(4) to be taken
into account in determining Capital Accounts as a result of a distribution other
than in liquidation of a Partner's interest in the Partnership, the amount of
such adjustment shall be treated as an item of gain (if the adjustment increases
the basis of the asset) or loss (if the adjustment decreases the basis of the
asset) from the disposition of the asset and shall be taken into account for
purposes of computing Net Income or Net Loss; and

                                       11
<PAGE>   17

                  (vii) Notwithstanding any other provision of this definition
of Net Income or Net Loss, any items which are specially allocated pursuant to
Section 6.3 shall not be taken into account in computing Net Income or Net Loss.
The amounts of the items of Partnership income, gain, loss, or deduction
available to be specially allocated pursuant to Section 6.3 shall be determined
by applying rules analogous to those set forth in this definition of Net Income
or Net Loss.

                  Solely for purposes of allocating Net Income or Net Loss in
any Fiscal Year to the Holders of the Series C Preferred Units, the Series D
Preferred Units, the Series E Preferred Units, the Series F Preferred Units, the
Series G Preferred Units, the Series H Preferred Units and the Series I
Preferred Units pursuant to Sections 6.2.B.1(c) and (e), and Section 6.2.B.2(b),
items of Net Income and Net Loss, as the case may be, shall not include
Depreciation with respect to properties that are "ceiling limited" in respect of
Preferred Limited Partners. For purposes of the preceding sentence, Partnership
property shall be considered ceiling limited in respect of a Preferred Limited
Partner if Depreciation attributable to such Partnership property which would
otherwise be allocable to such Partner, without regard to this paragraph,
exceeded depreciation determined for federal income tax purposes attributable to
such Partnership property which would otherwise be allocable to such Partner by
more than 5%.

                  "Nonrecourse Deductions" shall have the meaning set forth in
Regulations Section 1.704-2(b)(1), and the amount of Nonrecourse Deductions for
a Partnership Year shall be determined in accordance with the rules of
Regulations Section 1.704-2(c).

                  "Nonrecourse Liability" shall have the meaning set forth in
Regulations Section 1.752-1(a)(2).

                  "Notice of Redemption" means the Notice of Redemption
substantially in the form of Exhibit B to this Agreement.

                  "Operating Partnership" means AMB Property, L.P., a Delaware
limited partnership.

                  "Parity Preferred Capital" means the sum of (i) the aggregate
Series C Preferred Capital for all Holders of Series C Preferred Units (other
than the General Partner and the Operating Partnership), (ii) the aggregate
Series D Preferred Capital for all Holders of Series D Preferred Units (other
than the General Partner and the Operating Partnership), (iii) the aggregate
Series E Preferred Capital for all Holders of Series E Preferred Units (other
than the General Partner and the Operating Partnership), (iv) the aggregate
Series F Preferred Capital for all Holders of Series F Preferred Units (other
than the General Partner and the Operating Partnership), (v) the aggregate
Series G Preferred Capital for all Holders of Series G Preferred Units (other
than the General Partner and the Operating Partnership), (vi) the aggregate
Series H Preferred Capital for all Holders of Series H Preferred Units (other
than the General Partner and the Operating Partnership), (vi) the aggregate
Series I Preferred Capital for all Holders of Series I Preferred Units (other
than the General Partner and the Operating Partnership) and (vii) the aggregate
Future Parity Preferred Capital for each series of Preferred Units issued
following the date hereof.

                                       12
<PAGE>   18

                  "Parity Preferred Stock" means any class or series of equity
interest of AMB now or hereafter authorized, issued or outstanding expressly
designated by AMB to rank on a parity with the Series C Preferred Shares, the
Series D Preferred Shares, the Series E Preferred Shares, the Series F Preferred
Shares, the Series G Preferred Shares, the Series H Preferred Shares and the
Series I Preferred Shares with respect to distributions and rights upon
voluntary or involuntary liquidation, winding up or dissolution of AMB.

                  "Parity Preferred Unit" means any class or series of
Partnership Interests of the Partnership now or hereafter authorized, issued or
outstanding expressly designated by the Partnership to rank on a parity with the
Series C Preferred Units, the Series D Preferred Units, the Series E Preferred
Units, the Series F Preferred Units, the Series G Preferred Units, the Series H
Preferred Units and the Series I Preferred Units with respect to distributions
and rights upon voluntary or involuntary liquidation, winding up or dissolution
of the Partnership.

                  "Partner" means a General Partner or a Limited Partner, and
"Partners" means the General Partner and the Limited Partners.

                  "Partner Minimum Gain" means an amount, with respect to each
Partner Nonrecourse Debt, equal to the Partnership Minimum Gain that would
result if such Partner Nonrecourse Debt were treated as a Nonrecourse Liability,
determined in accordance with Regulations Section 1.704-2(i)(3).

                  "Partner Nonrecourse Debt" shall have the meaning set forth in
Regulations Section 1.704-2(b)(4).

                  "Partner Nonrecourse Deductions" shall have the meaning set
forth in Regulations Section 1.704-2(i)(2), and the amount of Partner
Nonrecourse Deductions with respect to a Partner Nonrecourse Debt for a
Partnership Year shall be determined in accordance with the rules of Regulations
Section 1.704-2(i)(2).

                  "Partnership" means the limited partnership formed under the
Act and pursuant to this Agreement, and any successor thereto.

                  "Partnership Interest" means an ownership interest in the
Partnership of either a Limited Partner or the General Partner and includes any
and all benefits to which the holder of such a Partnership Interest may be
entitled as provided in this Agreement, together with all obligations of such
Person to comply with the terms and provisions of this Agreement. There may be
one or more classes of Partnership Interests as provided in Section 4.3. A
Partnership Interest may be expressed as a number of Partnership Units. Unless
otherwise expressly provided for by the General Partner at the time of the
original issuance of any Partnership Interests, all Partnership Interests
(whether of a Limited Partner or a General Partner) shall be of the same class.
The Partnership Interests represented by the Common Units, the Series C
Preferred Units, the Series D Preferred Units, the Series E Preferred Units, the
Series F Preferred Units, the Series G Preferred Units, the Series H Preferred
Units and the Series I Preferred Units are the only Partnership Interests and
each such type of unit is a separate class of Partnership Interest for all
purposes of this Agreement.

                                       13
<PAGE>   19

                  "Partnership Minimum Gain" shall have the meaning set forth in
Regulations Section 1.704-2(b)(2), and the amount of Partnership Minimum Gain,
as well as any net increase or decrease in Partnership Minimum Gain, for a
Partnership Year shall be determined in accordance with the rules of Regulations
Section 1.704-2(d).

                  "Partnership Record Date" means the record date established by
the General Partner for the distribution of Available Cash with respect to
Common Units pursuant to Section 5.1 which record date shall be the same as the
record date established by AMB for a distribution to its stockholders of some or
all of its portion of such distribution.

                  "Partnership Unit" means, with respect to any class of
Partnership Interest, a fractional, undivided share of such class of Partnership
Interest issued pursuant to Sections 4.1 and 4.3. The ownership of Partnership
Units may be evidenced by a certificate for units substantially in the form of
Exhibit D-1 hereto or as the General Partner may determine with respect to any
class of Partnership Units issued from time to time under Sections 4.1 and 4.3.

                  "Partnership Year" means the fiscal year of the Partnership,
which shall be the calendar year.

                  "Percentage Interest" means, as to a Partner holding a class
of Partnership Interests, its interest in the Partnership as determined by
dividing the Partnership Units of such class owned by such Partner by the total
number of Partnership Units of such class then outstanding as specified in
Exhibit A attached hereto, as such Exhibit may be amended from time to time. If
the Partnership issues more than one class of Partnership Interest, the interest
in the Partnership among the classes of Partnership Interests shall be
determined as set forth in the amendment to the Partnership Agreement setting
forth the rights and privileges of such additional classes of Partnership
Interest, if any, as contemplated by Section 4.3.B.

                  "Person" means an individual or a corporation, partnership,
limited liability company, trust, unincorporated organization, association or
other entity.

                  "Plan Asset Regulation" means the regulations promulgated by
the United States Department of Labor in Title 29, Code of Federal Regulations,
Part 2510, Section 101-3, and any successor regulations thereto.

                  "Pledge" shall have the meaning set forth in Section 11.3.A.

                  "Preferred Distribution Shortfall" shall have the meaning
given to such term in Section 5.1 hereof.

                  "Preferred Limited Partner" means any Person holding a
Preferred Unit, and named as a Preferred Limited Partner in Exhibit A attached
hereto, as such Exhibit may be amended from time to time, or any Substitute
Limited Partner or Additional Limited Partner, in such Person's capacity as a
Preferred Limited Partner in the Partnership.

                                       14
<PAGE>   20

                  "Preferred Share" means a share of AMB preferred stock, par
value $.01 per share, with such rights, priorities and preferences as shall be
designated by the Board of Directors in accordance with the REIT Charter.

                  "Preferred Unit" means a Partnership Unit representing a
Limited Partnership Interest, with such preferential rights and priorities as
shall be designated by the General Partner pursuant to Section 4.3.C hereof
including, without limitation, the Series C Preferred Units, the Series D
Preferred Units, the Series E Preferred Units, the Series F Preferred Units, the
Series G Preferred Units, the Series H Preferred Units and the Series I
Preferred Units.

                  "Priority Return" means with respect to (i) the Series C
Preferred Units, the Series C Priority Return, (ii) the Series D Preferred
Units, the Series D Priority Return, (iii) the Series E Preferred Units, the
Series E Priority Return, (iv) the Series F Preferred Units, the Series F

                  Priority Return, (v) the Series G Preferred Units, the Series
G Priority Return, (vi) the Series H Preferred Units, the Series H Priority
Return and (vii) the Series I Preferred Units, the Series I Priority Return.

                  "Properties" means such interests in real property and
personal property including without limitation, fee interests, interests in
ground leases, interests in joint ventures, interests in mortgages, and Debt
instruments as the Partnership may hold from time to time.

                  "PTP" shall have the meaning set forth in Section 16.7.

                  "Qualified REIT Subsidiary" means any Subsidiary of AMB that
is a "qualified REIT subsidiary" within the meaning of Section 856(i) of the
Code.

                  "Qualified Transferee" means an "Accredited Investor" as
defined in Rule 501 promulgated under the Securities Act.

                  "Regulations" means the Income Tax Regulations promulgated
under the Code, as such regulations may be amended from time to time (including
corresponding provisions of succeeding regulations).

                  "Regulatory Allocations" shall have the meaning set forth in
Section 6.3.A(viii).

                  "REIT" means a real estate investment trust under Sections 856
through 860 of the Code.

                  "REIT Charter" means the Articles of Incorporation of AMB as
of November 24, 1997, as amended by the Articles Supplementary filed with the
Maryland Department of Assessments and Taxation on July 23, 1998 designating the
8 1/2% Series A Cumulative Redeemable Preferred Stock, the Articles
Supplementary filed with the Maryland Department of Assessments and Taxation on
November 12, 1998 designating the 8M% Series B Cumulative Redeemable Preferred
Stock, the Articles Supplementary filed with the Maryland Department of
Assessments and Taxation on November 24, 1998 designating the 8 3/4% Series C
Cumulative Redeemable Preferred Stock, the Articles Supplementary filed with the
Maryland Department of Assessments and Taxation on May 5, 1999 designating the
7.75% Series D Cumulative

                                       15
<PAGE>   21

Redeemable Preferred Stock, the Articles Supplementary filed with the Maryland
Department of Assessments and Taxation on August 31, 1999 designating the 7.75%
Series E Cumulative Redeemable Preferred Stock, the Articles Supplementary filed
with the Maryland Department of Assessments and Taxation on March 23, 2000
designating the 7.95% Series F Cumulative Redeemable Preferred Stock, the
Articles Supplementary filed with the Maryland Department of Assessments and
Taxation on August 30, 2000 designating the 7.95% Series G Cumulative Redeemable
Preferred Stock, the Articles Supplementary filed with the Maryland Department
of Assessments and Taxation on September 1, 2000 designating the 8.125% Series H
Cumulative Redeemable Preferred Stock and the Articles Supplementary filed with
the Maryland Department of Assessments and Taxation on March 21, 2001
designating the 8.00% Series I Cumulative Redeemable Preferred Stock and as
further amended or restated from time to time.

                  "REIT Requirements" shall have the meaning set forth in
Section 5.1.

                  "REIT Share" means a share of common stock, par value $.01 per
share, of AMB.

                  "Securities Act" means the Securities Act of 1933, as amended,
and the rules and regulations of the Securities and Exchange Commission
promulgated thereunder.

                  "Series B Preferred Units" shall have the meaning set forth in
Section 16.8.C.

                  "Series C Articles Supplementary" means the Articles
Supplementary of AMB in connection with its Series C Preferred Shares, as filed
with the Maryland Department of Assessments and Taxation on November 24, 1998.

                  "Series C Limited Partner" means any Person holding Series C
Preferred Units and named as a Series C Limited Partner in Exhibit A attached
hereto, as such Exhibit may be amended from time to time, or any Substitute
Limited Partner, in such Person's capacity as a Limited Partner in the
Partnership.

                  "Series C Preferred Capital" means a Capital Account balance
equal to the product of (i) the number of Series C Preferred Units then held by
the Series C Limited Partner (including the General Partner and the Operating
Partnership to the extent either of them holds Series C Preferred Units)
multiplied by (ii) the sum of $50 and any Preferred Distribution Shortfall per
Series C Preferred Unit.

                  "Series C Preferred Share" means a share of 8 3/4% Series C
Cumulative Redeemable Preferred Stock, par value $.01 per share, liquidation
preference $50 per share, of AMB.

                  "Series C Preferred Units" means the Partnership's 8 3/4%
Series C Cumulative Redeemable Partnership Units.

                  "Series C Preferred Unit Distribution Payment Date" shall have
the meaning set forth in Section 16.3.A hereof.

                                       16
<PAGE>   22

                  "Series C Priority Return" shall mean an amount equal to 8
3/4% per annum on an amount equal to $50 per Series C Preferred Unit then
outstanding (equivalent to $4.375 per annum). Such amount shall be determined on
a daily basis computed on the basis of a 360-day year of twelve 30-day months
(or actual days for any month which is shorter than a full monthly period),
cumulative from November 24, 1998 to the extent not distributed for any given
distribution period pursuant to Sections 5.1 and 16.3 hereof. Notwithstanding
the foregoing, distributions on the Series C Preferred Units will accrue whether
or not the terms and provisions of any agreement of the Partnership at any time
prohibit the current payment of distributions, whether or not the Partnership
has earnings, whether or not there are funds legally available for the payment
of such distributions and whether or not such distributions are authorized.
Accrued but unpaid distributions on the Series C Preferred Units will accumulate
as of the Series C Preferred Unit Distribution Payment Date on which they first
become payable.

                  "Series C Redemption" shall have the meaning set forth in
Section 16.5.A.

                  "Series D Articles Supplementary" means the Articles
Supplementary of AMB in connection with its Series D Preferred Shares, as filed
with the Maryland Department of Assessments and Taxation on May 5, 1999.

                  "Series D Limited Partner" means any Person holding Series D
Preferred Units and named as a Series D Limited Partner in Exhibit A attached
hereto, as such Exhibit may be amended from time to time, or any Substitute
Limited Partner, in such Person's capacity as a Limited Partner in the
Partnership.

                  "Series D Preferred Capital" means a Capital Account balance
equal to the product of (i) the number of Series D Preferred Units then held by
the Series D Limited Partner (including the General Partner and the Operating
Partnership to the extent either of them holds Series C Preferred Units)
multiplied by (ii) the sum of $50 and any Preferred Distribution Shortfall per
Series D Preferred Unit.

                  "Series D Preferred Share" means a share of 7.75% Series D
Cumulative Redeemable Preferred Stock, par value $.01 per share, liquidation
preference $50 per share, of AMB.

                  "Series D Preferred Units" means the Partnership's 7.75%
Series D Cumulative Redeemable Membership Units.

                  "Series D Preferred Unit Distribution Payment Date" shall have
the meaning set forth in Section 17.3.A hereof.

                  "Series D Priority Return" shall mean an amount equal to 7.75%
per annum on an amount equal to $50 per Series D Preferred Unit then outstanding
(equivalent to $3.875 per annum). Such amount shall be determined on a daily
basis computed on the basis of a 360-day year of twelve 30-day months (or actual
days for any month which is shorter than a full monthly period), cumulative from
May 5, 1999 to the extent not distributed for any given distribution period
pursuant to Sections 5.1 and 17.3 hereof. Notwithstanding the foregoing,
distributions on the Series D Preferred Units will accrue whether or not the
terms and provisions of any

                                       17
<PAGE>   23

agreement of the Partnership at any time prohibit the current payment of
distributions, whether or not the Partnership has earnings, whether or not there
are funds legally available for the payment of such distributions and whether or
not such distributions are authorized. Accrued but unpaid distributions on the
Series D Preferred Units will accumulate as of the Series D Preferred Unit
Distribution Payment Date on which they first become payable.

                  "Series D Redemption" shall have the meaning set forth in
Section 17.5.A.

                  "Series E Articles Supplementary" means the Articles
Supplementary of AMB in connection with its Series E Preferred Shares, as filed
with the Maryland Department of Assessments and Taxation on August 31, 1999.

                  "Series E Limited Partner" means any Person holding Series E
Preferred Units and named as a Series E Limited Partner in Exhibit A attached
hereto, as such Exhibit may be amended from time to time, or any Substitute
Limited Partner, in such Person's capacity as a Limited Partner in the
Partnership.

                  "Series E Preferred Capital" means a Capital Account balance
equal to the product of (i) the number of Series E Preferred Units then held by
the Holder (including the General Partner and the Operating Partnership to the
extent either of them holds Series E Preferred Units) multiplied by (ii) the sum
of $50 and any Preferred Distribution Shortfall per Series E Preferred Unit.

                  "Series E Preferred Share" means a share of 7.75% Series E
Cumulative Redeemable Preferred Stock, par value $.01 per share, liquidation
preference $50.00 per share, of AMB.

                  "Series E Preferred Units" means the Partnership's 7.75%
Series E Cumulative Redeemable Partnership Units.

                  "Series E Preferred Unit Distribution Payment Date" shall have
the meaning set forth in Section 18.3.A hereof.

                  "Series E Priority Return" shall mean an amount equal to 7.75%
per annum on an amount equal to $50.00 per Series E Preferred Unit then
outstanding (equivalent to $3.875 per annum). Such amount shall be determined on
a daily basis computed on the basis of a 360-day year of twelve 30-day months
(or actual days for any month which is shorter than a full monthly period),
cumulative from August 31, 1999 to the extent not distributed for any given
distribution period pursuant to Sections 5.1 and 18.3 hereof. Notwithstanding
the foregoing, distributions on the Series E Preferred Units will accrue whether
or not the terms and provisions of any agreement of the Partnership at any time
prohibit the current payment of distributions, whether or not the Partnership
has earnings, whether or not there are funds legally available for the payment
of such distributions and whether or not such distributions are authorized.
Accrued but unpaid distributions on the Series E Preferred Units will accumulate
as of the Series E Preferred Unit Distribution Payment Date on which they first
become payable.

                  "Series E Redemption" shall have the meaning set forth in
Section 18.5.A.

                                       18
<PAGE>   24

                  "Series F Articles Supplementary" means the Articles
Supplementary of AMB in connection with its Series F Preferred Shares, as filed
with the Maryland Department of Assessments and Taxation on March 23, 2000.

                  "Series F Limited Partner" means any Person holding Series F
Preferred Units and named as a Series F Limited Partner in Exhibit A attached
hereto, as such Exhibit may be amended from time to time, or any Substitute
Limited Partner, in such Person's capacity as a Limited Partner in the
Partnership.

                  "Series F Preferred Capital" means a Capital Account balance
equal to the product of (i) the number of Series F Preferred Units then held by
the Holder (including the General Partner and the Operating Partnership to the
extent either of them holds Series F Preferred Units) multiplied by (ii) the sum
of $50 and any Preferred Distribution Shortfall per Series F Preferred Unit.

                  "Series F Preferred Share" means a share of 7.95% Series F
Cumulative Redeemable Preferred Stock, par value $.01 per share, liquidation
preference $50.00 per share, of AMB.

                  "Series F Preferred Units" means the Partnership's 7.95%
Series F Cumulative Redeemable Partnership Units.

                  "Series F Preferred Unit Distribution Payment Date" shall have
the meaning set forth in Section 19.3.A hereof.

                  "Series F Priority Return" shall mean an amount equal to 7.95%
per annum on an amount equal to $50.00 per Series F Preferred Unit then
outstanding (equivalent to $3.975 per annum). Such amount shall be determined on
a daily basis computed on the basis of a 360-day year of twelve 30-day months
(or actual days for any month which is shorter than a full monthly period),
cumulative from March 22, 2000 to the extent not distributed for any given
distribution period pursuant to Sections 5.1 and 19.3 hereof. Notwithstanding
the foregoing, distributions on the Series F Preferred Units will accrue whether
or not the terms and provisions of any agreement of the Partnership at any time
prohibit the current payment of distributions, whether or not the Partnership
has earnings, whether or not there are funds legally available for the payment
of such distributions and whether or not such distributions are authorized.
Accrued but unpaid distributions on the Series F Preferred Units will accumulate
as of the Series F Preferred Unit Distribution Payment Date on which they first
become payable.

                  "Series F Redemption" shall have the meaning set forth in
Section 19.5.A.

                  "Series G Articles Supplementary" means the Articles
Supplementary of AMB in connection with its Series G Preferred Shares, as filed
with the Maryland Department of Assessments and Taxation on August 29, 2000.

                  "Series G Limited Partner" means any Person holding Series G
Preferred Units and named as a Series G Limited Partner in Exhibit A attached
hereto, as such Exhibit may be

                                       19
<PAGE>   25

amended from time to time, or any Substitute Limited Partner, in such Person's
capacity as a Limited Partner in the Partnership.

                  "Series G Preferred Capital" means a Capital Account balance
equal to the product of (i) the number of Series G Preferred Units then held by
the Holder (including the General Partner and the Operating Partnership to the
extent either of them holds Series G Preferred Units) multiplied by (ii) the sum
of $50 and any Preferred Distribution Shortfall per Series G Preferred Unit.

                  "Series G Preferred Share" means a share of 7.95% Series G
Cumulative Redeemable Preferred Stock, par value $.01 per share, liquidation
preference $50.00 per share, of AMB.

                  "Series G Preferred Units" means the Partnership's 7.95%
Series G Cumulative Redeemable Partnership Units.

                  "Series G Preferred Unit Distribution Payment Date" shall have
the meaning set forth in Section 20.3.A hereof.

                  "Series G Priority Return" shall mean an amount equal to 7.95%
per annum on an amount equal to $50.00 per Series G Preferred Unit then
outstanding (equivalent to $3.975 per annum). Such amount shall be determined on
a daily basis computed on the basis of a 360-day year of twelve 30-day months
(or actual days for any month which is shorter than a full monthly period),
cumulative from August 29, 2000 to the extent not distributed for any given
distribution period pursuant to Sections 5.1 and 20.3 hereof. Notwithstanding
the foregoing, distributions on the Series G Preferred Units will accrue whether
or not the terms and provisions of any agreement of the Partnership at any time
prohibit the current payment of distributions, whether or not the Partnership
has earnings, whether or not there are funds legally available for the payment
of such distributions and whether or not such distributions are authorized.
Accrued but unpaid distributions on the Series G Preferred Units will accumulate
as of the Series G Preferred Unit Distribution Payment Date on which they first
become payable.

                  "Series G Redemption" shall have the meaning set forth in
Section 20.5.A.

                  "Series H Articles Supplementary" means the Articles
Supplementary of AMB in connection with its Series H Preferred Shares, as filed
with the Maryland Department of Assessments and Taxation on September 1, 2000.

                  "Series H Limited Partner" means any Person holding Series H
Preferred Units and named as a Series H Limited Partner in Exhibit A attached
hereto, as such Exhibit may be amended from time to time, or any Substitute
Limited Partner, in such Person's capacity as a Limited Partner in the
Partnership.

                  "Series H Preferred Capital" means a Capital Account balance
equal to the product of (i) the number of Series H Preferred Units then held by
the Holder (including the General Partner and the Operating Partnership to the
extent either of them holds Series H

                                       20
<PAGE>   26

Preferred Units) multiplied by (ii) the sum of $50 and any Preferred
Distribution Shortfall per Series H Preferred Unit.

                  "Series H Preferred Share" means a share of 8.125% Series H
Cumulative Redeemable Preferred Stock, par value $.01 per share, liquidation
preference $50.00 per share, of AMB.

                  "Series H Preferred Units" means the Partnership's 8.125%
Series H Cumulative Redeemable Partnership Units.

                  "Series H Preferred Unit Distribution Payment Date" shall have
the meaning set forth in Section 21.3.A hereof.

                  "Series H Priority Return" shall mean an amount equal to
8.125% per annum on an amount equal to $50.00 per Series H Preferred Unit then
outstanding (equivalent to $4.0625 per annum). Such amount shall be determined
on a daily basis computed on the basis of a 360-day year of twelve 30-day months
(or actual days for any month which is shorter than a full monthly period),
cumulative from September 1, 2000 to the extent not distributed for any given
distribution period pursuant to Sections 5.1 and 21.3 hereof. Notwithstanding
the foregoing, distributions on the Series H Preferred Units will accrue whether
or not the terms and provisions of any agreement of the Partnership at any time
prohibit the current payment of distributions, whether or not the Partnership
has earnings, whether or not there are funds legally available for the payment
of such distributions and whether or not such distributions are authorized.
Accrued but unpaid distributions on the Series H Preferred Units will accumulate
as of the Series H Preferred Unit Distribution Payment Date on which they first
become payable.

                  "Series H Redemption" shall have the meaning set forth in
Section 21.5.A.

                  "Series I Articles Supplementary" means the Articles
Supplementary of AMB in connection with its Series I Preferred Shares, as filed
with the Maryland Department of Assessments and Taxation on March 21, 2001.

                  "Series I Limited Partner" means any Person holding Series I
Preferred Units and named as a Series I Limited Partner in Exhibit A attached
hereto, as such Exhibit may be amended from time to time, or any Substitute
Limited Partner, in such Person's capacity as a Limited Partner in the
Partnership.

                  "Series I Preferred Capital" means a Capital Account balance
equal to the product of (i) the number of Series I Preferred Units then held by
the Holder (including the General Partner and the Operating Partnership to the
extent either of them holds Series I Preferred Units) multiplied by (ii) the sum
of $50 and any Preferred Distribution Shortfall per Series I Preferred Unit.

                  "Series I Preferred Share" means a share of 8.00% Series I
Cumulative Redeemable Preferred Stock, par value $.01 per share, liquidation
preference $50.00 per share, of AMB.

                                       21
<PAGE>   27

                  "Series I Preferred Units" means the Partnership's 8.00%
Series I Cumulative Redeemable Partnership Units.

                  "Series I Preferred Unit Distribution Payment Date" shall have
the meaning set forth in Section 22.3.A hereof.

                  "Series I Priority Return" shall mean an amount equal to 8.00%
per annum on an amount equal to $50.00 per Series I Preferred Unit then
outstanding (equivalent to $4.00 per annum). Such amount shall be determined on
a daily basis computed on the basis of a 360-day year of twelve 30-day months
(or actual days for any month which is shorter than a full monthly period),
cumulative from March 21, 2001 to the extent not distributed for any given
distribution period pursuant to Sections 5.1 and 22.3 hereof. Notwithstanding
the foregoing, distributions on the Series I Preferred Units will accrue whether
or not the terms and provisions of any agreement of the Partnership at any time
prohibit the current payment of distributions, whether or not the Partnership
has earnings, whether or not there are funds legally available for the payment
of such distributions and whether or not such distributions are authorized.
Accrued but unpaid distributions on the Series I Preferred Units will accumulate
as of the Series I Preferred Unit Distribution Payment Date on which they first
become payable.

                  "Series I Redemption" shall have the meaning set forth in
Section 22.5.A.

                  "Specified Redemption Date" means the day of receipt by the
General Partner of a Notice of Redemption.

                  "Subsidiary" shall mean, with respect to any person, any
corporation, partnership, limited liability company, joint venture or other
entity of which a majority of (i) the voting power of the voting equity
securities or (ii) the outstanding equity interests, is owned, directly or
indirectly, by such person.

                  "Subsidiary Partnership" means any partnership or limited
liability company that is a Subsidiary of the Partnership or the Operating
Partnership.

                  "Substituted Limited Partner" means a Person who is admitted
as a Limited Partner to the Partnership pursuant to Section 11.4.

                  "Tax Items" shall have the meaning set forth in Section 6.4.A.

                  "Tenant" means any tenant from which AMB derives rent either
directly or indirectly through partnerships, including the Partnership.

                                   ARTICLE 2.
                             ORGANIZATIONAL MATTERS

                  Section 2.1. Organization

                  The Partnership is a limited partnership formed pursuant to
the provisions of the Act and upon the terms and conditions set forth in this
Agreement. Except as expressly provided herein, the rights and obligations of
the Partners and the administration and termination of the

                                       22
<PAGE>   28

Partnership shall be governed by the Act. The Partnership Interest of each
Partner shall be personal property for all purposes.

                  Section 2.2. Name

                  The name of the Partnership is AMB Property II, L.P. The
Partnership's business may be conducted under any other name or names deemed
advisable by the General Partner, including the name of the General Partner or
any Affiliate thereof. The words "Limited Partnership," "L.P.," "Ltd." or
similar words or letters shall be included in the Partnership's name where
necessary for the purposes of complying with the laws of any jurisdiction that
so requires. The General Partner in its sole and absolute discretion may change
the name of the Partnership at any time and from time to time and shall notify
the Limited Partners of such change in the next regular communication to the
Limited Partners.

                  Section 2.3. Resident Agent; Principal Office

                  The name and address of the resident agent of the Partnership
in the State of Delaware is The Corporation Trust Company, 1209 Orange Street,
Wilmington, Delaware 19801. The address of the principal office of the
Partnership in the State of Delaware is The Corporation Trust Company, 1209
Orange Street, Wilmington, Delaware 19801 at such address. The principal office
of the Partnership is located at Pier 1, Bay 1, San Francisco, California 94111,
or such other place as the General Partner may from time to time designate by
notice to the Limited Partners. The Partnership may maintain offices at such
other place or places within or outside the State of Delaware as the General
Partner deems advisable.

                  Section 2.4. Power of Attorney

                  A. Each Limited Partner and each Assignee constitutes
and appoints the General Partner, any Liquidator, and authorized officers and
attorneys-in-fact of each, and each of those acting singly, in each case with
full power of substitution, as its true and lawful agent and attorney-in-fact,
with full power and authority in its name, place and stead to:

                  (i)      execute, swear to, acknowledge, deliver, file and
                           record in the appropriate public offices: (a) all
                           certificates, documents and other instruments
                           (including, without limitation, this Agreement and
                           the Certificate and all amendments or restatements
                           thereof) that the General Partner or the Liquidator
                           deems appropriate or necessary to form, qualify or
                           continue the existence or qualification of the
                           Partnership as a limited partnership (or a
                           partnership in which the Limited Partners have
                           limited liability) in the State of Delaware and in
                           all other jurisdictions in which the Partnership may
                           conduct business or own property; (b) all instruments
                           that the General Partner or any Liquidator deems
                           appropriate or necessary to reflect any amendment,
                           change, modification or restatement of this Agreement
                           in accordance with its terms; (c) all conveyances and
                           other instruments or documents that the General
                           Partner or any Liquidator deems appropriate or
                           necessary to reflect the dissolution and liquidation
                           of the Partnership pursuant to the terms of this
                           Agreement, including, without limitation, a

                                       23
<PAGE>   29

                           certificate of cancellation; (d) all instruments
                           relating to the admission, withdrawal, removal or
                           substitution of any Partner pursuant to, or other
                           events described in, Articles 11, 12 and 13 or the
                           Capital Contribution of any Partner; and (e) all
                           certificates, documents and other instruments
                           relating to the determination of the rights,
                           preferences and privileges of Partnership Interests;
                           and

                  (ii)     execute, swear to, acknowledge and file all ballots,
                           consents, approvals, waivers, certificates and other
                           instruments appropriate or necessary, in the sole and
                           absolute discretion of the General Partner or any
                           Liquidator, to make, evidence, give, confirm or
                           ratify any vote, consent, approval, agreement or
                           other action which is made or given by the Partners
                           hereunder or is consistent with the terms of this
                           Agreement or appropriate or necessary, in the sole
                           discretion of the General Partner or any Liquidator,
                           to effectuate the terms or intent of this Agreement.

Nothing contained herein shall be construed as authorizing the General Partner
or any Liquidator to amend this Agreement except in accordance with Article 14
or as may be otherwise expressly provided for in this Agreement.

                  B. The foregoing power of attorney is hereby declared to
be irrevocable and a power coupled with an interest, in recognition of the fact
that each of the Partners will be relying upon the power of the General Partner
and any Liquidator to act as contemplated by this Agreement in any filing or
other action by it on behalf of the Partnership, and it shall survive and not be
affected by the subsequent Incapacity of any Limited Partner or Assignee and the
transfer of all or any portion of such Limited Partner's or Assignee's
Partnership Units and shall extend to such Limited Partner's or Assignee's
heirs, successors, assigns and personal representatives. Each such Limited
Partner or Assignee hereby agrees to be bound by any representation made by the
General Partner or any Liquidator, acting in good faith pursuant to such power
of attorney; and each such Limited Partner or Assignee hereby waives any and all
defenses which may be available to contest, negate or disaffirm the action of
the General Partner or any Liquidator, taken in good faith under such power of
attorney. Each Limited Partner or Assignee shall execute and deliver to the
General Partner or any Liquidator, within fifteen (15) days after receipt of the
General Partner's or Liquidator's request therefor, such further designation,
powers of attorney and other instruments as the General Partner or the
Liquidator, as the case may be, deems necessary to effectuate this Agreement and
the purposes of the Partnership.

                  Section 2.5. Term

                  The term of the Partnership commenced on October 15, 1997 and
shall continue until October 15, 2096 unless it is dissolved sooner pursuant to
the provisions of Article 13 or as otherwise provided by law.

                  Section 2.6. Number of Partners

                  Without the consent of the General Partner which may be given
or withheld in its sole discretion, the Partnership shall not at any time have
more than one hundred (100) partners

                                       24
<PAGE>   30

(including as partners those persons indirectly owning an interest in the
Partnership through a partnership, limited liability company, S corporation or
grantor trust (such entity, a "flow through entity"), but only if substantially
all of the value of such person's interest in the flow through entity is
attributable to the flow through entity's interest (direct or indirect) in the
Partnership).

                                   ARTICLE 3.
                                     PURPOSE

                  Section 3.1. Purpose and Business

                  The purpose and nature of the business to be conducted by the
Partnership is (i) to conduct any business that may be lawfully conducted by a
limited partnership organized pursuant to the Act; provided, however, that such
business shall be limited to and conducted in such a manner as to permit AMB, in
its capacity as the owner of 100% of the Common Stock of the General Partner and
as the sole General Partner of the Operating Partnership, at all times to be
classified as a REIT for Federal income tax purposes, unless AMB ceases to
qualify as a REIT for reasons other than the conduct of the business of the
Partnership, (ii) to enter into any partnership, joint venture or other similar
arrangement to engage in any of the foregoing or to own interests in any entity
engaged, directly or indirectly, in any of the foregoing and (iii) to do
anything necessary or incidental to the foregoing. In connection with the
foregoing, and without limiting AMB's right in its sole discretion to cease
qualifying as a REIT, the Partners acknowledge that AMB's current status as a
REIT inures to the benefit of all the Partners and not solely the General
Partner.

                  Section 3.2. Powers

                  The Partnership is empowered to do any and all acts and things
necessary, appropriate, proper, advisable, incidental to or convenient for the
furtherance and accomplishment of the purposes and business described herein and
for the protection and benefit of the Partnership, including, without
limitation, full power and authority, directly or through its ownership interest
in other entities, to enter into, perform and carry out contracts of any kind,
borrow money and issue evidences of indebtedness, whether or not secured by
mortgage, deed of trust, pledge or other lien, acquire and develop real
property, and manage, lease, sell, transfer and dispose of real property;
provided, however, not withstanding anything to the contrary in this Agreement,
the Partnership shall not take, or refrain from taking, any action which, in the
judgment of AMB, in its sole and absolute discretion, (i) could adversely affect
the ability of AMB, in its capacity as the owner of 100% of the Common Stock of
the General Partner and as the sole general partner of the Operating
Partnership, to continue to qualify as a REIT, (ii) absent the consent of the
General Partner, which may be given or withheld in its sole and absolute
discretion, and except with respect to the distribution of Available Cash to the
Series C Limited Partners, the Series D Limited Partners, the Series E Limited
Partners, the Series F Limited Partners, the Series G Limited Partners, the
Series H Limited Partners and the Series I Limited Partners in accordance with
Sections 16.3, 17.3, 18.3, 19.3, 20.3, 21.3 and 22.3, respectively, could
subject AMB to any taxes under Section 857 or Section 4981 of the Code, or (iii)
could violate any law or regulation of any governmental body or agency having
jurisdiction over AMB

                                       25
<PAGE>   31

or its securities, unless any such action (or inaction) under the foregoing
clauses (i), (ii) or (iii) shall have been specifically consented to by AMB in
writing.

                  Section 3.3. Partnership Only for Purposes Specified

                  The Partnership shall be a partnership only for the purposes
specified in Section 3.1, and this Agreement shall not be deemed to create a
partnership among the Partners with respect to any activities whatsoever other
than the activities within the purposes of the Partnership as specified in
Section 3.1. Except as otherwise provided in this Agreement, no Partner shall
have any authority to act for, bind, commit or assume any obligation or
responsibility on behalf of the Partnership, its properties or any other
Partner. No Partner, in its capacity as a Partner under this Agreement, shall be
responsible or liable for any indebtedness or obligation of another Partner, nor
shall the Partnership be responsible or liable for any indebtedness or
obligation of any Partner, incurred either before or after the execution and
delivery of this Agreement by such Partner, except as to those responsibilities,
liabilities, indebtedness or obligations incurred pursuant to and as limited by
the terms of this Agreement and the Act.

                  Section 3.4. Representations and Warranties by the Parties

                  A. Each Partner that is an individual represents and warrants
to each other Partner that (i) such Partner has in the case of any Person other
than an individual, the power and authority, and in the case of an individual,
the legal capacity, to enter into this Agreement and perform such Partner's
obligations hereunder, (ii) the consummation of the transactions contemplated by
this Agreement to be performed by such Partner will not result in a breach or
violation of, or a default under, any agreement by which such Partner or any of
such Partner's property is or are bound, or any statute, regulation, order or
other law to which such Partner is subject, (iii) such Partner is neither a
"foreign person" within the meaning of Section 1445(f) of the Code nor a
"foreign partner" within the meaning of Section 1446(e) of the Code and (iv)
this Agreement has been duly executed and delivered by such Partner and is
binding upon, and enforceable against, such Partner in accordance with its
terms.

                  B. Each Partner that is not an individual represents and
warrants to each other Partner that (i) its execution and delivery of this
Agreement and all transactions contemplated by this Agreement to be performed by
it have been duly authorized by all necessary action, including without
limitation, that of its general partner(s), committee(s), trustee(s),
beneficiaries, directors and/or stockholder(s), as the case may be, as required,
(ii) the consummation of such transactions shall not result in a breach or
violation of, or a default under, its certificate of limited partnership,
partnership agreement, trust agreement, limited liability company operating
agreement, charter or by-laws, as the case may be, any agreement by which such
Partner or any of such Partner's properties or any of its partners,
beneficiaries, trustees or stockholders, as the case may be, is or are bound, or
any statute, regulation, order or other law to which such Partner or any of its
partners, trustees, beneficiaries or stockholders, as the case may be, is or are
subject, (iii) such Partner is neither a "foreign person" within the meaning of
Section 1445(f) of the Code nor a "foreign partner" within the meaning of
Section 1446(e) of the Code and (iv) this

                                       26
<PAGE>   32

Agreement has been duly executed and delivered by such Partner and is binding
upon, and enforceable against, such Partner in accordance with its terms.

                  C. Each Partner represents, warrants and agrees that it
has acquired and continues to hold its interest in the Partnership for its own
account for investment only and not for the purpose of, or with a view toward,
the resale or distribution of all or any part thereof, nor with a view toward
selling or otherwise distributing such interest or any part thereof at any
particular time or under any predetermined circumstances. Each Partner further
represents and warrants that it is a sophisticated investor, able and accustomed
to handling sophisticated financial matters for itself, particularly real estate
investments, and that it has a sufficiently high net worth that it does not
anticipate a need for the funds it has invested in the Partnership in what it
understands to be a highly speculative and illiquid investment.

                  D. Each Partner further represents, warrants and agrees
as follows:

                           (i) Except as provided in Exhibit E, at any time such
         Partner actually or Constructively owns a 25% or greater capital
         interest or profits interest in the Partnership, it does not and will
         not, without the prior written consent of the General Partner, actually
         own or Constructively Own (a) with respect to any Tenant that is a
         corporation, any stock of such Tenant and (b) with respect to any
         Tenant that is not a corporation, any interests in either the assets or
         net profits of such Tenant.

                           (ii) Except as provided in Exhibit F, at any time
         such Partner actually or Constructively owns a 25% or greater capital
         interest or profits interest in the Partnership, it does not, and
         agrees that it will not without the prior written consent of the
         General Partner, actually own or Constructively Own, any stock in AMB,
         other than any shares of capital stock of AMB that such Partner may
         acquire pursuant to Sections 16.8, 17.8, 18.8, 19.8, 20.8, 21.8 or
         22.8, subject to the ownership limitations set forth in the REIT
         Charter.

                           (iii) Upon request of the General Partner, it will
         disclose to the General Partner the amount of shares of capital stock
         of AMB that it actually owns or Constructively Owns.

                           (iv) It understands that if, for any reason, (a) the
         representations, warranties or agreements set forth in Section 3.4.D(i)
         or (ii) are violated or (b) the Partnership's actual or Constructive
         Ownership of the REIT Shares or other shares of capital stock of AMB
         violates the limitations set forth in the REIT Charter, then (x) some
         or all of the Series C Redemption rights or rights to exchange
         Partnership Interests for Series C Preferred Shares, some or all of the
         Series D Redemption rights or rights to exchange Partnership Interests
         for Series D Preferred Shares, some or all of the Series E Redemption
         rights or rights to exchange Partnership Interests for Series E
         Preferred Shares, some or all of the Series F Redemption rights or
         rights to exchange Partnership Interests for Series F Preferred Shares,
         some or all of the Series G Redemption rights or rights to exchange
         Partnership Interests for Series G Preferred Shares, some or all of the
         Series H Redemption rights or rights to exchange Partnership Interests
         for Series H Preferred Shares or some or all of the Series I Redemption
         rights or rights to exchange

                                       27
<PAGE>   33

         Partnership Interests for Series I Preferred Shares of the Limited
         Partners may become non-exercisable, and (y) some or all of such shares
         owned by the Partners and/or some or all of the Partnership Interests
         owned by the Limited Partners may be automatically transferred to a
         trust for the benefit of a charitable beneficiary, as provided in the
         REIT Charter and Exhibit I of this Agreement, respectively.

                  E. The representations and warranties contained in Sections
3.4.A, 3.4.B, 3.4.C and 3.4.D shall survive the execution and delivery of this
Agreement by each Partner and the dissolution and winding up of the Partnership.

                  F. Each Partner hereby acknowledges that no representations as
to potential profit, cash flows, funds from operations or yield, if any, in
respect of the Partnership or the General Partner have been made by any Partner
or any employee or representative or Affiliate of any Partner, and that
projections and any other information, including, without limitation, financial
and descriptive information and documentation, which may have been in any manner
submitted to such Partner shall not constitute any representation or warranty of
any kind or nature, express or implied.

                  Section 3.5. Certain ERISA Matters

                  Each Partner acknowledges that the Partnership is intended to
qualify as a "real estate operating company" (as such term is defined in the
Plan Asset Regulation). The General Partner will use its reasonable best efforts
to structure the investments in, relationships with and conduct with respect to
Properties and any other assets of the Partnership so that the Partnership will
be a "real estate operating company" (as such term is defined in the Plan Asset
Regulation).

                                   ARTICLE 4.
                             CAPITAL CONTRIBUTIONS

                  Section 4.1. Capital Contributions of the Partners

                  At the time of their respective execution of this Agreement,
the Partners shall make or shall have made Capital Contributions as set forth in
Exhibit A to this Agreement. The Partners shall own Partnership Units of the
class and in the amounts set forth in Exhibit A and shall have a Percentage
Interest in the Partnership as set forth in Exhibit A, which Percentage Interest
shall be adjusted in Exhibit A from time to time by the General Partner to the
extent necessary to accurately reflect exchanges, redemptions, Capital
Contributions, the issuance of additional Partnership Units or similar events
having an effect on a Partner's Percentage Interest. Except as required by law
or as otherwise provided in Sections 4.3 and 10.5, no Partner shall be required
or permitted to make any additional Capital Contributions or loans to the
Partnership.

                  Section 4.2. Loans

                  Subject to Section 4.3, the Partnership may incur Debt, or
enter into other similar credit, guarantee, financing or refinancing
arrangements for any purpose (including, without limitation, in connection with
any further acquisition of Properties) with any Person, including the General
Partner, the Operating Partnership and their affiliates, upon such terms as the

                                       28
<PAGE>   34

General Partner determines appropriate; provided, that the Partnership shall not
incur any Debt that is recourse to the General Partner, except to the extent
otherwise agreed to by the General Partner in its sole discretion.

                  Section 4.3. Additional Funding and Capital Contributions

                  A. General. The General Partner may, at any time and from time
to time, determine that the Partnership requires additional funds ("Additional
Funds") for the acquisition of additional Properties or for such other
Partnership purposes as the General Partner may determine. Additional Funds may
be raised by the Partnership, at the election of the General Partner, in any
manner provided in, and in accordance with, the terms of this Section 4.3. No
Person shall have any preemptive, preferential or similar right or rights to
subscribe for or acquire any Partnership Interest.

                  B. Issuance of Additional Partnership Interests. The General
Partner may raise all or any portion of the Additional Funds by accepting
additional Capital Contributions of cash. The General Partner may also accept
additional Capital Contributions of real property or other non-cash assets. In
connection with any such additional Capital Contributions (of cash or property),
and subject to Sections 16.6, 17.6, 18.6, 19.6, 20.6, 21.6 and 22.6 hereof, the
General Partner is hereby authorized to cause the Partnership from time to time
to issue to Partners (including the General Partner) or other Persons
(including, without limitation, in connection with the contribution of property
to the Partnership) additional Partnership Units or other Partnership Interests
in one or more classes, or one or more series of any of such classes, with such
designations, preferences and relative, participating, optional or other special
rights, powers, and duties, including rights, powers, and duties senior to then
existing Limited Partnership Interests, all as shall be determined by the
General Partner in its sole and absolute discretion subject to Delaware law, and
as set forth by amendment to this Agreement, including without limitation: (i)
the allocations of items of Partnership income, gain, loss, deduction, and
credit to such class or series of Partnership Interests; (ii) the right of each
such class or series of Partnership Interests to share in Partnership
distributions; (iii) the rights of each such class or series of Partnership
Interests upon dissolution and liquidation of the Partnership; and (iv) the
right to vote. In the event that the Partnership issues additional Partnership
Interests pursuant to this Section 4.3.B, the General Partner shall make such
revisions to this Agreement (including but not limited to the revisions
described in Sections 5.4 and 6.2.C) as it determines are necessary to reflect
the issuance of such additional Partnership Interests.

                  C. Percentage Interest Adjustments in the Case of Capital
Contributions for Partnership Units. Upon the acceptance of additional Capital
Contributions in exchange for Partnership Units, the Percentage Interest related
thereto, and the Percentage Interest of each other Partner, shall be equal to
the amounts agreed to by the Partnership and the contributors.

                  D. AMB agrees to comply with Section 4.3.D of the Third
Amended and Restated Agreement of Limited Partnership of the Operating
Partnership, as amended or waived from time to time.

                                       29
<PAGE>   35

                  Section 4.4. No Preemptive Rights

                  Except to the extent expressly granted by the Partnership
pursuant to another agreement, no Person shall have any preemptive, preferential
or other similar right with respect to (i) making additional Capital
Contributions or loans to the Partnership or (ii) issuance or sale of any
Partnership Units or other Partnership Interests.

                  Section 4.5. Other Contribution Provisions

                  In the event that any Partner is admitted to the Partnership
and is given (or is treated as having received) a Capital Account in exchange
for services rendered to the Partnership, such transaction shall be treated by
the Partnership and the affected Partner as if the Partnership had compensated
such Partner in cash, and the Partner had contributed such cash to the capital
of the Partnership. In addition, with the consent of the General Partner, in its
sole discretion, one or more Limited Partners may enter into contribution
agreements with the Partnership which have the effect of providing a guarantee
of certain obligations of the Partnership.

                                   ARTICLE 5.
                                  DISTRIBUTIONS

                  Section 5.1. Requirement and Characterization of Distributions

                  The General Partner shall cause the Partnership to distribute
all, or such portion as the General Partner may in its discretion determine,
Available Cash generated by the Partnership (i) first, to the extent that the
amount of cash distributed with respect to any Partnership Interests that are
entitled to any preference in distribution for any prior distribution period was
less than the required distribution for such outstanding Partnership Interests
for such prior distribution period, and to the extent such deficiency has not
been subsequently distributed pursuant to this Section 5.1 (a "Preferred
Distribution Shortfall"), in accordance with the rights of such class of
Partnership Interests (and within such class, pro rata in proportion to the
respective Percentage Interests on the applicable record date) and to the
Partners who are Partners on the applicable record date with respect to such
distribution, (ii) second, with respect to any Partnership Interests that are
entitled to any preference in distribution, in accordance with the rights of
such class of Partnership Interests (and within such class, pro rata in
proportion to the respective Percentage Interests on the applicable record date)
and (iii) third, with respect to Partnership Interests that are not entitled to
any preference in distribution, pro rata to each such class on a quarterly basis
and in accordance with the terms of such class to Partners who are Partners of
such class on the Partnership Record Date with respect to such distribution (and
within each such class, pro rata in proportion with the respective Percentage
Interests on such Partnership Record Date). Except as expressly provided for in
Article 16 with respect to the Series C Preferred Units, in Article 17 with
respect to the Series D Preferred Units, in Article 18 with respect to the
Series E Preferred Units, in Article 19 with respect to the Series F Preferred
Units, in Article 20 with respect to the Series G Preferred Units, in Article 21
with respect to the Series H Preferred Units, in Article 22 with respect to the
Series I Preferred Units and in an agreement, if any, entered into in connection
with the creation of a new class of Partnership Interests in accordance with
Article 4, no Partnership Interest shall be entitled to a distribution in
preference to any other Partnership

                                       30
<PAGE>   36

Interest. The General Partner shall take such reasonable efforts, as determined
by it in its sole and absolute discretion and consistent with AMB's
qualification as a REIT, to cause the Partnership to distribute sufficient
amounts to enable AMB, in its capacity of general partner of the Operating
Partnership, and the sole stockholder of the General Partner, to pay stockholder
dividends that will, so long as AMB has determined to qualify as a REIT (a)
satisfy the requirements for qualifying as a REIT under the Code and Regulations
("REIT Requirements") and (b) except to the extent otherwise determined by the
General Partner, avoid any Federal income or excise tax liability of the AMB,
except to the extent that a distribution pursuant to clause (b) would prevent
the Partnership from making a distribution to the holders of Series C Preferred
Units, Series D Preferred Units, Series E Preferred Units, Series F Preferred
Units, Series G Preferred Units or Series H Preferred Units in accordance with
Sections 16.3, 17.3, 18.3, 19.3, 20.3, 21.3 and 22.3, respectively.

                  Section 5.2. Distributions in Kind

                  No right is given to any Partner to demand and receive
property other than cash. The General Partner may determine, in its sole and
absolute discretion, to make a distribution in kind to the Partners of
Partnership assets, and such assets shall be distributed in such a fashion as to
ensure that the fair market value is distributed and allocated in accordance
with Articles 5, 6 and 10; provided, however, that, in such case, the General
Partners shall distribute only cash to the Series C Limited Partners, the Series
D Limited Partners, the Series E Limited Partners, the Series F Limited
Partners, the Series G Limited Partners, Series H Limited Partners and Series I
Limited Partners.

                  Section 5.3. Distributions Upon Liquidation

                  Proceeds from a Liquidating Event shall be distributed to the
Partners in accordance with Section 13.2.

                  Section 5.4. Distributions to Reflect Issuance of Additional
Partnership Interests

                  In the event that the Partnership issues additional
Partnership Interests to the General Partner or any Additional Limited Partner
pursuant to Section 4.3.B or 4.4, the General Partner shall make such revisions
to this Article 5 as it determines are necessary to reflect the issuance of such
additional Partnership Interests. In the absence of any agreement to the
contrary, an Additional Limited Partner shall be entitled to the distributions
set forth in Section 5.1 (without regard to this Section 5.4) with respect to
the quarter during which the closing of its contribution to the Partnership
occurs, multiplied by a fraction the numerator of which is the number of days
from and after the date of such closing through the end of the applicable
quarter, and the denominator of which is the total number of days in such
quarter.

                                       31
<PAGE>   37

                                   ARTICLE 6.
                                   ALLOCATIONS

                  Section 6.1. Timing and Amount of Allocations of Net Income
and Net Loss

                  Net Income and Net Loss of the Partnership shall be determined
and allocated with respect to each fiscal year of the Partnership as of the end
of each such year. Subject to the other provisions of this Article 6, an
allocation to a Holder of a share of Net Income or Net Loss shall be treated as
an allocation of the same share of each item of income, gain, loss or deduction
that is taken into account in computing Net Income or Net Loss.

                  Section 6.2.      General Allocations

                  A. In General. Except as otherwise provided in this Article 6,
Net Income and Net Loss allocable with respect to a class of Partnership
Interests, shall be allocated to each of the Holders holding such class of
Partnership Interests in accordance with their respective Percentage Interest of
such class.

                  B. B.1. Net Income. Except as provided in Section 6.3, Net
Income for any Partnership Year shall be allocated in the following manner and
order of priority:

                  (a)      First, 100% to the General Partner in an amount equal
                           to the remainder, if any, of the cumulative Net
                           Losses allocated to the General Partner pursuant to
                           Section 6.2.B.2(d) for all prior Partnership Years
                           minus the cumulative Net Income allocated to the
                           General Partner pursuant to this Section 6.2.B.1(a)
                           for all prior Partnership Years;

                  (b)      Second, 100% to each Holder of Partnership Interests
                           in an amount equal to the remainder, if any, of the
                           cumulative Net Losses allocated to each such Holder
                           pursuant to Section 6.2.B.2(c) for all prior
                           Partnership Years minus the cumulative Net Income
                           allocated to such Holder pursuant to this Section
                           6.2.B.1(b) for all prior Partnership Years;

                  (c)      Third, 100% to the Holders of Preferred Units in an
                           amount equal to the remainder, if any, of the
                           cumulative Net Losses allocated to such Holders
                           pursuant to Section 6.2.B.2(b) for all prior
                           Partnership Years minus the cumulative Net Income
                           allocated to such Holders pursuant to this Section
                           6.2.B.1(c) for all prior Partnership Years;

                  (d)      Fourth, 100% to the Holders of Common Units in an
                           amount equal to the remainder, if any, of the
                           cumulative Net Losses allocated to each such Holder
                           pursuant to Section 6.2.B.2(a) for all prior
                           Partnership Years minus the cumulative Net Income
                           allocated to each Holder pursuant to this Section
                           6.2.B.1(d) for all prior Partnership Years;

                  (e)      Fifth, 100% to the Holders of Preferred Units, with
                           respect to each series of Preferred Units, in an
                           amount equal to the excess of (i) the cumulative

                                       32
<PAGE>   38

                           Priority Return to the last day of the current
                           Partnership Year or to the date of redemption of such
                           Preferred Units, to the extent such Preferred Units
                           are redeemed during such year, over (ii) the
                           cumulative Net Income allocated to the Holders of
                           such Preferred Units, pursuant to this Section
                           6.2.B.1(e) for all prior Partnership Years; and

                  (f)      Sixth, 100% to the Holders of Common Units in
                           accordance with their respective Percentage Interests
                           in the Common Units.

                  To the extent the allocations of Net Income set forth above in
any paragraph of this Section 6.2.B.1 are not sufficient to entirely satisfy the
allocation set forth in such paragraph, such allocation shall be made in
proportion to the total amount that would have been allocated pursuant to such
paragraph without regard to such shortfall.

                  B.2. Net Losses. Except as provided in Section 6.3, Net Losses
for any Partnership Year shall be allocated in the following manner and order of
priority:

                  (a)      First, 100% to the Holders of Common Units in
                           accordance with their respective Percentage Interests
                           in the Common Units (to the extent consistent with
                           this Section 6.2.B.2(a)) until the Adjusted Capital
                           Account (ignoring for this purpose any amounts a
                           Holder is obligated to contribute to the capital of
                           the Partnership or is deemed obligated to contribute
                           pursuant to Regulations Section
                           1.704-1(b)(2)(ii)(c)(2) and ignoring the Holder's
                           Series C Preferred Capital, Series D Preferred
                           Capital, Series E Preferred Capital, Series F
                           Preferred Capital, Series G Preferred Capital, Series
                           H Preferred Capital and Series I Preferred Capital)
                           of each such Holder is zero;

                  (b)      Second, 100% to the Holders of Preferred Units, pro
                           rata to each such Holder's Adjusted Capital Account
                           (ignoring for this purpose any amounts a Holder is
                           obligated to contribute to the capital of the
                           Partnership or is deemed obligated to contribute
                           pursuant to Regulations Section
                           1.704-1(b)(2)(ii)(c)(2)), until the Adjusted Capital
                           Account (as so modified) of each such Holder is zero;

                  (c) Third, 100% to the Holders of Partnership Interests to the
extent of, and in proportion to, the positive balance (if any) in their Adjusted
Capital Accounts; and

                  (d)      Fourth, 100% to the General Partner.

                  C. Allocations to Reflect Issuance of Additional Partnership
Interests. In the event that the Partnership issues additional Partnership
Interests to the General Partner or any Additional Limited Partner pursuant to
Section 4.3 or 4.4, the General Partner shall make such revisions to this
Section 6.2 or to Section 12.2.B as it determines are necessary to reflect the
terms of the issuance of such additional Partnership Interests, including making
preferential allocations to certain classes of Partnership Interests, subject to
the terms of the Series C

                                       33
<PAGE>   39

Preferred Units, the Series D Preferred Units, the Series E Preferred Units, the
Series F Preferred Units, the Series G Preferred Units, the Series H Preferred
Units and the Series I Preferred Units.

                  Section 6.3. Additional Allocation Provisions

                  Notwithstanding the foregoing provisions of this Article 6:

                  A. Regulatory Allocations.

                           (i) Minimum Gain Chargeback. Except as otherwise
         provided in Regulations Section 1.704-2(f), notwithstanding the
         provisions of Section 6.2, or any other provision of this Article 6, if
         there is a net decrease in Partnership Minimum Gain during any fiscal
         year, each Holder shall be specially allocated items of Partnership
         income and gain for such year (and, if necessary, subsequent years) in
         an amount equal to such Holder's share of the net decrease in
         Partnership Minimum Gain, as determined under Regulations Section
         1.704-2(g). Allocations pursuant to the previous sentence shall be made
         in proportion to the respective amounts required to be allocated to
         each Holder pursuant thereto. The items to be allocated shall be
         determined in accordance with Regulations Sections 1.704-2(f)(6) and
         1.704-2(j)(2). This Section 6.3.A(i) is intended to qualify as a
         "minimum gain chargeback" within the meaning of Regulation Section
         1.704-2(f) which shall be controlling in the event of a conflict
         between such Regulation and this Section 6.3.A(i).

                            (ii) Partner Minimum Gain Chargeback. Except as
         otherwise provided in Regulations Section 1.704-2(i)(4), and
         notwithstanding the provisions of Section 6.2, or any other provision
         of this Article 6 (except Section 6.3.A(i)), if there is a net decrease
         in Partner Minimum Gain attributable to a Partner Nonrecourse Debt
         during any fiscal year, each Holder who has a share of the Partner
         Minimum Gain attributable to such Partner Nonrecourse Debt, determined
         in accordance with Regulations Section 1.704-2(i)(5), shall be
         specially allocated items of Partnership income and gain for such year
         (and, if necessary, subsequent years) in an amount equal to such
         Holder's share of the net decrease in Partner Minimum Gain attributable
         to such Partner Nonrecourse Debt, determined in accordance with
         Regulations Section 1.704-2(i)(4). Allocations pursuant to the previous
         sentence shall be made in proportion to the respective amounts required
         to be allocated to each Holder pursuant thereto. The items to be so
         allocated shall be determined in accordance with Regulations Sections
         1.704-2(i)(4) and 1.704-2(j)(2). This Section 6.3.A(ii) is intended to
         qualify as a "chargeback of partner nonrecourse debt minimum gain"
         within the meaning of Regulation Section 1.704-2(i) which shall be
         controlling in the event of a conflict between such Regulation and this
         Section 6.3.A(ii).

                           (iii) Nonrecourse Deductions and Partner Nonrecourse
         Deductions. Any Nonrecourse Deductions for any fiscal year shall be
         specially allocated to the Holders in accordance with their respective
         Percentage Interest in Common Units. Any Partner Nonrecourse Deductions
         for any fiscal year shall be specially allocated to the Holder(s) who
         bears the economic risk of loss with respect to the Partner Nonrecourse
         Debt to which such Partner Nonrecourse Deductions are attributable, in
         accordance with Regulations Sections 1.704-2(b)(4) and 1.704-2(i).

                                       34
<PAGE>   40

                           (iv) Qualified Income Offset. If any Holder
         unexpectedly receives an adjustment, allocation or distribution
         described in Regulations Section 1.704-1(b)(2)(ii)(d)(4), (5) or (6),
         items of Partnership income and gain shall be allocated, in accordance
         with Regulations Section 1.704-1(b)(2)(ii)(d), to the Holder in an
         amount and manner sufficient to eliminate, to the extent required by
         such Regulations, the Adjusted Capital Account Deficit of the Holder as
         quickly as possible provided that an allocation pursuant to this
         Section 6.3.A(iv) shall be made if and only to the extent that such
         Holder would have an Adjusted Capital Account Deficit after all other
         allocations provided in this Article 6 have been tentatively made as if
         this Section 6.3.A(iv) were not in the Agreement. It is intended that
         this Section 6.3.A(iv) qualify and be construed as a "qualified income
         offset" within the meaning of Regulations 1.704-1(b)(2)(ii)(d), which
         shall be controlling in the event of a conflict between such
         Regulations and this Section 6.3.A(iv).

                           (v) Gross Income Allocation. In the event any Holder
         has a deficit Capital Account at the end of any fiscal year which is in
         excess of the sum of (a) the amount (if any) such Holder is obligated
         to restore to the Partnership and (b) the amount such Holder is deemed
         to be obligated to restore pursuant to Regulations Section
         1.704-1(b)(2)(ii)(c) or the penultimate sentences of Regulations
         Sections 1.704-2(g)(1) and 1.704-2(i)(5), each such Holder shall be
         specially allocated items of Partnership income and gain in the amount
         of such excess as quickly as possible; provided, that an allocation
         pursuant to this Section 6.3.A(v) shall be made if and only to the
         extent that such Holder would have a deficit Capital Account in excess
         of such sum after all other allocations provided in this Article 6 have
         been tentatively made as if this Section 6.3.A(v) and Section 6.3.A(iv)
         were not in the Agreement.

                           (vi) Limitation on Allocation of Net Loss. To the
         extent any allocation of Net Loss would cause or increase an Adjusted
         Capital Account Deficit as to any Holder, such allocation of Net Loss
         shall be reallocated among the other Holders in accordance with their
         respective Percentage Interests in Common Units, subject to the
         limitations of this Section 6.3.A(vi).

                           (vii) Section 754 Adjustment. To the extent an
         adjustment to the adjusted tax basis of any Partnership asset pursuant
         to Code Section 734(b) or Code Section 743(b) is required, pursuant to
         Regulations Section 1.704-1(b)(2)(iv)(m)(2) or Regulations Section
         1.704-1(b)(2)(iv)(m)(4), to be taken into account in determining
         Capital Accounts as the result of a distribution to a Holder in
         complete liquidation of his interest in the Partnership, the amount of
         such adjustment to the Capital Accounts shall be treated as an item of
         gain (if the adjustment increases the basis of the asset) or loss (if
         the adjustment decreases such basis) and such gain or loss shall be
         specially allocated to the Holders in accordance with their interests
         in the Partnership in the event that Regulations Section
         1.704-1(b)(2)(iv)(m)(2) applies, or to the Holders to whom such
         distribution was made in the event that Regulations Section
         1.704-1(b)(2)(iv)(m)(4) applies.

                           (viii) Curative Allocation. The allocations set forth
         in Sections 6.3.A(i), (ii), (iii), (iv), (v), (vi), and (vii) (the
         "Regulatory Allocations") are intended to comply

                                       35
<PAGE>   41

         with certain regulatory requirements, including the requirements of
         Regulations Sections 1.704-1(b) and 1.704-2. Notwithstanding the
         provisions of Sections 6.1 and 6.2, the Regulatory Allocations shall be
         taken into account in allocating other items of income, gain, loss and
         deduction among the Holders so that, to the extent possible, the net
         amount of such allocations of other items and the Regulatory
         Allocations to each Holder shall be equal to the net amount that would
         have been allocated to each such Holder if the Regulatory Allocations
         had not occurred.

                  B. For purposes of determining a Holder's proportional share
of the "excess nonrecourse liabilities" of the Partnership within the meaning of
Regulations Section 1.752-3(a)(3), each Holder's interest in Partnership profits
shall be such Holder's Percentage Interest in Common Units.

                  Section 6.4. Tax Allocations

                  A. In General. Except as otherwise provided in this Section
6.4, for income tax purposes each item of income, gain, loss and deduction
(collectively, "Tax Items") shall be allocated among the Holders in the same
manner as its correlative item of "book" income, gain, loss or deduction is
allocated pursuant to Sections 6.2 and 6.3.

                  B. Allocations Respecting Section 704(c) Revaluations.
Notwithstanding Section 6.4.A, Tax Items with respect to Partnership property
that is contributed to the Partnership by a Partner shall be shared among the
Holders for income tax purposes pursuant to Regulations promulgated under
Section 704(c) of the Code, so as to take into account the variation, if any,
between the basis of the property to the Partnership and its initial Gross Asset
Value. With respect to Partnership property that is initially contributed to the
Partnership upon its formation pursuant to Section 4.1, such variation between
basis and initial Gross Asset Value shall be taken into account under the
"traditional method" as described in Regulations Section 1.704-3(b). With
respect to properties subsequently contributed to the Partnership, the
Partnership shall account for such variation under any method approved under
Section 704(c) of the Code and the applicable regulations as chosen by the
General Partner. In the event the Gross Asset Value of any Partnership asset is
adjusted pursuant to subparagraph (ii) of the definition of Gross Asset Value
(provided in Article 1), subsequent allocations of Tax Items with respect to
such asset shall take account of the variation, if any, between the adjusted
basis of such asset and its Gross Asset Value in the same manner as under
Section 704(c) of the Code and the applicable regulations consistent with the
requirements of Regulations Section 1.704-1(b)(2)(iv)(g) using any method
approved under 704(c) of the Code and the applicable regulations as chosen by
the General Partner.

                                   ARTICLE 7.
                     MANAGEMENT AND OPERATIONS OF BUSINESS

                  Section 7.1. Management

                  A. Except as otherwise expressly provided in this Agreement,
all management powers over the business and affairs of the Partnership are
exclusively vested in the General Partner, and no Limited Partner shall have any
right to participate in or exercise control

                                       36
<PAGE>   42

or management power over the business and affairs of the Partnership; provided,
however, that the General Partner may be removed by the Majority in Interest of
the Limited Partners, with or without cause, such removal effective upon the
delivery of written notice thereof by the Limited Partners to the General
Partner. In addition to the powers now or hereafter granted a general partner of
a limited partnership under the Act and other applicable law or which are
granted to the General Partner under any other provision of this Agreement, the
General Partner, subject to the other provisions hereof including Section 7.3,
shall have full power and authority to do all things deemed necessary or
desirable by it to conduct the business of the Partnership, to exercise all
powers set forth in Section 3.2 and to effectuate the purposes set forth in
Section 3.1, including, without limitation:

                  (i)      the making of any expenditures, the lending or
                           borrowing of money (including, without limitation,
                           making prepayments on loans and borrowing money to
                           permit the Partnership to make distributions to its
                           Partners in such amounts as will permit AMB, in its
                           capacity as the sole general partner of the Operating
                           Partnership and as sole stockholder of the General
                           Partner (for so long as AMB has determined to qualify
                           as a REIT), to avoid the payment of any Federal
                           income tax (including, for this purpose, any excise
                           tax pursuant to Section 4981 of the Code) and to make
                           distributions to its stockholders sufficient to
                           permit AMB to maintain REIT status), the assumption
                           or guarantee of, or other contracting for,
                           indebtedness and other liabilities, the issuance of
                           evidences of indebtedness (including the securing of
                           same by mortgage, deed of trust or other lien or
                           encumbrance on all or any of the Partnership's
                           assets) and the incurring of any obligations it deems
                           necessary for the conduct of the activities of the
                           Partnership;

                  (ii)     the making of tax, regulatory and other filings, or
                           rendering of periodic or other reports to
                           governmental or other agencies having jurisdiction
                           over the business or assets of the Partnership;

                  (iii)    subject to the provisions of Section 7.3.D, the
                           acquisition, disposition, mortgage, pledge,
                           encumbrance, hypothecation or exchange of any assets
                           of the Partnership or the merger or other combination
                           of the Partnership with or into another entity;

                  (iv)     the mortgage, pledge, encumbrance or hypothecation of
                           all or any assets of the Partnership, and the use of
                           the assets of the Partnership (including, without
                           limitation, cash on hand) for any purpose consistent
                           with the terms of this Agreement and on any terms it
                           sees fit, including, without limitation, the
                           financing of the conduct or the operations of the
                           General Partner or the Partnership, the lending of
                           funds to other Persons (including, without
                           limitation, the General Partner (if necessary to
                           permit the financing or capitalization of a
                           subsidiary of the General Partner or the Partnership)
                           and any Subsidiaries of the Partnership) and the
                           repayment of

                                       37
<PAGE>   43

                           obligations of the Partnership, any of its
                           Subsidiaries and any other Person in which it has an
                           equity investment;

                  (v)      the negotiation, execution, and performance of any
                           contracts, leases, conveyances or other instruments
                           that the General Partner considers useful or
                           necessary to the conduct of the Partnership's
                           operations or the implementation of the General
                           Partner's powers under this Agreement;

                  (vi)     the distribution of Partnership cash or other
                           Partnership assets in accordance with this Agreement;

                  (vii)    the selection and dismissal of employees of the
                           Partnership (including, without limitation, employees
                           having titles such as "president," "vice president,"
                           "secretary" and "treasurer"), and agents, outside
                           attorneys, accountants, consultants and contractors
                           of the Partnership, the determination of their
                           compensation and other terms of employment or hiring,
                           including waivers of conflicts of interest and the
                           payment of their expenses and compensation out of the
                           Partnership's assets;

                  (viii)   the maintenance of such insurance for the benefit of
                           the Partnership and the Partners as it deems
                           necessary or appropriate;

                  (ix)     the formation of, or acquisition of an interest in,
                           and the contribution of property to, any further
                           limited or general partnerships, joint ventures or
                           other relationships that it deems desirable
                           (including, without limitation, the acquisition of
                           interests in, and the contributions of property to
                           any Subsidiary and any other Person in which it has
                           an equity investment from time to time); provided
                           that as long as AMB, in its capacity as the sole
                           stockholder of the General Partner and as the sole
                           general partner of the Operating Partnership, has
                           determined to continue to qualify as a REIT, the
                           Partnership may not engage in any such formation,
                           acquisition or contribution that would cause AMB to
                           fail to qualify as a REIT;

                  (x)      the control of any matters affecting the rights and
                           obligations of the Partnership, including the conduct
                           of litigation and the incurring of legal expense and
                           the settlement of claims and litigation, and the
                           indemnification of any Person against liabilities and
                           contingencies to the extent permitted by law;

                  (xi)     the undertaking of any action in connection with the
                           Partnership's direct or indirect investment in any
                           Person (including, without limitation, contributing
                           or loaning Partnership funds to, incurring
                           indebtedness on behalf of, or guarantying the
                           obligations of any such Persons);

                  (xii)    subject to the other provisions in this Agreement,
                           the determination of the fair market value of any
                           Partnership property distributed in kind using

                                       38
<PAGE>   44

                           such reasonable method of valuation as it may adopt;
                           provided that, such methods are otherwise consistent
                           with requirements of this Agreement;

                  (xiii)   the management, operation, leasing, landscaping,
                           repair, alteration, demolition or improvement of any
                           real property or improvements owned by the
                           Partnership or any Subsidiary of the Partnership or
                           any Person in which the Partnership has made a direct
                           or indirect equity investment;

                  (xiv)    holding, managing, investing and reinvesting cash and
                           other assets of the Partnership;

                  (xv)     the collection and receipt of revenues and income of
                           the Partnership;

                  (xvi)    the exercise, directly or indirectly through any
                           attorney-in-fact acting under a general or limited
                           power of attorney, of any right, including the right
                           to vote, appurtenant to any asset or investment held
                           by the Partnership;

                  (xvii)   the exercise of any of the powers of the General
                           Partner enumerated in this Agreement on behalf of or
                           in connection with any Subsidiary of the Partnership
                           or any other Person in which the Partnership has a
                           direct or indirect interest, or jointly with any such
                           Subsidiary or other Person;

                  (xviii)  the exercise of any of the powers of the General
                           Partner enumerated in this Agreement on behalf of any
                           Person in which the Partnership does not have an
                           interest, pursuant to contractual or other
                           arrangements with such Person;

                  (xix)    the making, execution and delivery of any and all
                           deeds, leases, notes, deeds to secure debt,
                           mortgages, deeds of trust, security agreements,
                           conveyances, contracts, guarantees, warranties,
                           indemnities, waivers, releases or legal instruments
                           or other agreements in writing necessary or
                           appropriate in the judgment of the General Partner
                           for the accomplishment of any of the powers of the
                           General Partner enumerated in this Agreement; and

                  (xx)     the making of loans by the Partnership to its
                           Partners, for any purpose, provided that such loans
                           be upon arm's-length terms.

                  B. Each of the Limited Partners agrees that the General
Partner is authorized to execute, deliver and perform the above-mentioned
agreements and transactions on behalf of the Partnership without any further
act, approval or vote of the Partners, notwithstanding any other provisions of
this Agreement (except as provided in Section 7.3), the Act or any applicable
law, rule or regulation. The execution, delivery or performance by the General
Partner or the Partnership of any agreement authorized or permitted under this
Agreement shall not constitute a breach by the General Partner of any duty that
the General Partner may owe the Partnership or

                                       39
<PAGE>   45

the Limited Partners or any other Persons under this Agreement or of any duty
stated or implied by law or equity.

                  C. At all times from and after the date hereof, the General
Partner may cause the Partnership to obtain and maintain (i) casualty, liability
and other insurance (including, without limitation, earthquake insurance) on the
properties of the Partnership and (ii) liability insurance for the Indemnities
hereunder.

                  D. At all times from and after the date hereof, the General
Partner may cause the Partnership to establish and maintain working capital and
other reserves in such amounts as the General Partner, in its sole and absolute
discretion, deems appropriate and reasonable from time to time.

                  E. In exercising its authority under this Agreement, the
General Partner may, but other than as set forth in the following sentence and
as expressly set forth in the agreements listed on Exhibit H hereto, shall be
under no obligation to, take into account the tax consequences to any Partner
(including the General Partner) of any action taken by the General Partner. The
General Partner and the Partnership shall not have liability to a Limited
Partner under any circumstances as a result of an income tax liability incurred
by such Limited Partner as a result of an action (or inaction) by the General
Partner pursuant to its authority under this Agreement.

                  F. Except as otherwise provided herein, to the extent the
duties of the General Partner require expenditures of funds to be paid to third
parties, the General Partner shall not have any obligations hereunder except to
the extent that Partnership funds are reasonably available to it for the
performance of such duties, and nothing herein contained shall be deemed to
authorize or require the General Partner, in its capacity as such, to expend its
individual funds for payment to third parties or to undertake any individual
liability or obligation on behalf of the Partnership.

                  Section 7.2. Certificate of Limited Partnership

                  To the extent that such action is determined by the General
Partner to be reasonable and necessary or appropriate, the General Partner shall
file amendments to and restatements of the Certificate and do all the things to
maintain the Partnership as a limited partnership (or a partnership in which the
limited partners have limited liability) under the laws of the State of Delaware
and to maintain the Partnership's qualification to do business as a foreign
limited partnership in each other state, the District of Columbia or other
jurisdiction, in which the Partnership may elect to do business or own property.
Subject to the terms of Section 8.5.A(iv), the General Partner shall not be
required, before or after filing, to deliver or mail a copy of the Certificate
or any amendment thereto to any Limited Partner. The General Partner shall use
all reasonable efforts to cause to be filed such other certificates or documents
as may be reasonable and necessary or appropriate for the formation,
continuation, qualification and operation of a limited partnership (or a
partnership in which the limited partners have limited liability) in the State
of Delaware, and any other state, or the District of Columbia or other
jurisdiction, in which the Partnership may elect to do business or own property.

                                       40
<PAGE>   46

                  Section 7.3. Restrictions on General Partner's Authority

                  A. The General Partner may not take any action in
contravention of this Agreement,
including, without limitation:

                  (i)      take any action that would make it impossible to
                           carry on the ordinary business of the Partnership,
                           except as otherwise provided in this Agreement;

                  (ii)     possess Partnership property, or assign any rights in
                           specific Partnership property, for other than a
                           Partnership purpose except as otherwise provided in
                           this Agreement;

                  (iii)    admit a Person as a Partner, except as otherwise
                           provided in this Agreement;

                  (iv)     perform any act that would subject a Limited Partner
                           to liability as a general partner in any jurisdiction
                           or any other liability except as provided herein or
                           under the Act; or

                  (v)      perform any act that would subject the Partnership to
                           regulation as an "investment company" as such term is
                           defined under the Investment Company Act of 1940, as
                           amended.

                  B. The General Partner shall not, without the prior Consent of
the Partners (in addition to any Consent of the Limited Partners required by any
other provision hereof), undertake, on behalf of the Partnership, any of the
following actions or enter into any transaction which would have the effect of
such transactions:

                  (i)      except as provided in Section 7.3.D below, amend,
                           modify or terminate this Agreement other than to
                           reflect the admission, substitution, termination or
                           withdrawal of partners pursuant to Article 12;

                  (ii)     make a general assignment for the benefit of
                           creditors or appoint or acquiesce in the appointment
                           of a custodian, receiver or trustee for all or any
                           part of the assets of the Partnership;

                  (iii)    institute any proceeding for bankruptcy on behalf of
                           the Partnership;

                  (iv)     confess a judgment against the Partnership; or

                  (v)      enter into a merger (including a triangular merger),
                           consolidation or other combination of the Partnership
                           with or into another entity.

                  C. Except in the case of a Liquidating Event pursuant to
Section 13.1 (other than Section 13.1.F), the General Partner shall not, without
the prior Consent of the Limited Partners, undertake, on behalf of the
Partnership, any actions or enter into any transaction which would have the
effect of a dissolution of the Partnership, including a sale, exchange, transfer
or

                                       41
<PAGE>   47

other disposition of all or substantially all of the Partnership's assets in a
single transaction or a series of related transactions.

                  D. Notwithstanding Sections 7.3.B and 7.3.C, but subject to
Section 7.3.E, the General Partner shall have the power, without the Consent of
the Partners, to amend this Agreement as may be required to facilitate or
implement any of the following purposes:

                  (i)      to add to the obligations of the General Partner or
                           surrender any right or power granted to the General
                           Partner or any Affiliate of the General Partner for
                           the benefit of the Limited Partners;

                  (ii)     to reflect the issuance of additional Partnership
                           Interests pursuant to Section 4.3.B, or the
                           admission, substitution, termination, reduction in
                           Partnership Units or withdrawal of Partners in
                           accordance with this Agreement (which may be effected
                           through the replacement of Exhibit A with an amended
                           Exhibit A);

                  (iii)    to set forth or amend the designations, rights,
                           powers, duties, and preferences of the holders of any
                           additional Partnership Interests issued pursuant to
                           Article 4;

                  (iv)     to reflect a change that is of an inconsequential
                           nature and does not adversely affect the Limited
                           Partners in any material respect, or to cure any
                           ambiguity in, correct or supplement any provision, or
                           make other changes with respect to matters arising
                           under, this Agreement that will not be inconsistent
                           with law or with the provisions of this Agreement;

                  (v)      to satisfy any requirements, conditions, or
                           guidelines contained in any order, directive,
                           opinion, ruling or regulation of a Federal, state of
                           local agency or contained in Federal, state or local
                           law.

                  (vi)     to reflect such changes as are reasonably necessary
                           for AMB, in its capacity as the sole stockholder of
                           the General Partner and as the sole general partner
                           of the Operating Partnership, to maintain its status
                           as a REIT, including changes which may be
                           necessitated due to a change in applicable law (or an
                           authoritative interpretation thereof) or a ruling of
                           the IRS; and

                  (vii)    to modify, as set forth in the definition of "Capital
                           Account," the manner in which Capital Accounts are
                           computed.

The General Partner will provide notice to the Limited Partners when any action
under this Section 7.3.D is taken.

                  E. Notwithstanding Sections 7.3.B, 7.3.C and 7.3.D, this
Agreement shall not be amended, and no action may be taken by the General
Partner, including in either case through merger or sale of assets of the
Partnership or otherwise, without the Consent of each Common

                                       42
<PAGE>   48

Limited Partner or Preferred Limited Partner adversely affected if such
amendment or action would (i) convert a Limited Partner's interest in the
Partnership into a general partner's interest (except as the result of the
General Partner acquiring such interest), (ii) modify the limited liability of a
Limited Partner, (iii) alter rights of the Partner to receive distributions
pursuant to Article 5 or Section 13.2.A(4) or Articles 16, 17, 18, 19 or 20 or
the allocations specified in Article 6 (except as permitted pursuant to Sections
4.3 and 7.3.D), (iv) alter the Series C Redemption or exchange rights as set
forth in Sections 16.5 and 16.8, respectively, the Series D Redemption or
exchange rights as set forth in Sections 17.5 and 17.8, respectively, the Series
E Redemption or exchange rights as set forth in Sections 18.5 and 18.8,
respectively, the Series F Redemption or exchange rights as set forth in
Sections 19.5 and 19.8, respectively, the Series G Redemption or exchange rights
as set forth in Sections 20.5 and 20.8, respectively, the Series H Redemption or
exchange rights as set forth in Sections 21.5 and 21.8, respectively, or the
Series I Redemption or exchange rights as set forth in Sections 22.5 and 22.8,
respectively, or (v) amend this Section 7.3.E. Further, no amendment may alter
the restrictions on the General Partner's authority set forth elsewhere in this
Section 7.3 without the Consent specified in such section.

                  F. The General Partner shall not undertake to dispose of any
Partnership Property specified in the agreements listed in Exhibit G in a
taxable sale or taxable exchange prior to the dates specified in such agreements
without the prior consent of each Limited Partner which contributed all or any
portion of an interest in such Property to the Partnership, as set forth in such
agreements.

                  Section 7.4. Reimbursement of the General Partner

                  A. Except as provided in this Section 7.4 and elsewhere in
this Agreement (including the provisions of Articles 5 and 6 regarding
distributions, payments and allocations to which it may be entitled), the
General Partner shall not be compensated for its services as general partner of
the Partnership.

                  B. The General Partner shall be reimbursed on a monthly basis,
or such other basis as the General Partner may determine in its sole and
absolute discretion, for all expenses it incurs relating to the ownership of
interests in and operation of, or for the benefit of, the Partnership. Such
reimbursements shall be in addition to any reimbursement to the General Partner
as a result of indemnification pursuant to Section 7.7.

                  C. If and to the extent any reimbursements to the General
Partner pursuant to this Section 7.4 constitute gross income of the General
Partner (as opposed to the repayment of advances made by the General Partner on
behalf of the Partnership), such amounts shall constitute guaranteed payments
within the meaning of Section 707(c) of the Code, shall be treated consistently
therewith by the Partnership and all Partners, and shall not be treated as
distributions for purposes of computing the Partners' Capital Accounts.

                  Section 7.5. Outside Activities of the General Partner

                  Without the Consent of the Limited Partners, the General
Partner shall not, directly or indirectly, enter into or conduct any business,
other than in connection with the ownership, acquisition and disposition of
Partnership Interests as a General Partner and the

                                       43
<PAGE>   49

management of the business of the Partnership and such activities as are
incidental to the same and activities incidental to the ownership of interests
permitted by the next succeeding sentence. Without the Consent of the Limited
Partners, the General Partner shall not, directly or indirectly, participate in
or otherwise acquire any interest in any real or personal property, except its
General Partner Interest, its interest in any Subsidiary Partnership(s) (held
directly or indirectly through a Qualified REIT Subsidiary) that the General
Partner holds in order to maintain such Subsidiary Partnership's status as a
partnership, and such bank accounts, similar instruments or other short-term
investments as it deems necessary to carry out its responsibilities contemplated
under this Agreement and the REIT Charter. The General Partner's General Partner
Interest in the Partnership, and interests in such short-term liquid
investments, bank accounts or similar instruments as the General Partner deems
necessary to carry out its responsibilities contemplated under this Agreement
and the Charter are interests which the General Partner is permitted to acquire
and hold for purposes of this Section 7.5.

                  Section 7.6. Employee Benefit Plans

                  The General Partner, in its sole and absolute discretion and
without the approval of the Limited Partners, may propose and adopt on behalf of
the Partnership employee benefit plans funded by the Partnership for the benefit
of employees of the General Partner, the Partnership, Subsidiaries of the
Partnership or any Affiliate of any of them in respect of services performed,
directly or indirectly, for the benefit of the Partnership, the General Partner,
or any of the Partnership's Subsidiaries.

                  Section 7.7. Indemnification

                  A. The Partnership shall indemnify an Indemnitee from and
against any and all losses, claims, damages, liabilities, joint or several,
expenses (including legal fees and expenses), judgments, fines, settlements, and
other amounts arising from any and all claims, demands, actions, suits or
proceedings, civil, criminal, administrative or investigative, that relate to
the operations of the Partnership as set forth in this Agreement in which any
Indemnitee may be involved, or is threatened to be involved, as a party or
otherwise, unless it is established that: (i) the act or omission of the
Indemnitee was material to the matter giving rise to the proceeding and either
was committed in bad faith or was the result of active and deliberate
dishonesty; (ii) the Indemnitee actually received an improper personal benefit
in money, property or services; or (iii) in the case of any criminal proceeding,
the Indemnitee had reasonable cause to believe that the act or omission was
unlawful. Without limitation, the foregoing indemnity shall extend to any
liability of any Indemnitee, pursuant to a loan guaranty or otherwise, for any
indebtedness of the Partnership or any Subsidiary of the Partnership (including,
without limitation, any indebtedness which the Partnership or any Subsidiary of
the Partnership has assumed or taken subject to), and the General Partner is
hereby authorized and empowered, on behalf of the Partnership, to enter into one
or more indemnity agreements consistent with the provisions of this Section 7.7
in favor of any Indemnitee having or potentially having liability for any such
indebtedness. The termination of any proceeding by judgment, order or settlement
does not create a presumption that the Indemnitee did not meet the requisite
standard of conduct set forth in this Section 7.7.A. The termination of any
proceeding by conviction or upon a plea of nolo contendere or its equivalent, or
any entry of an order of probation prior to judgment, creates a

                                       44
<PAGE>   50

rebuttable presumption that the Indemnitee acted in a manner contrary to that
specified in this Section 7.7.A. Any indemnification pursuant to this Section
7.7 shall be made only out of the assets of the Partnership, and any insurance
proceeds from the liability policy covering the General Partner and any
Indemnitee, and neither the General Partner nor any Limited Partner shall have
any obligation to contribute to the capital of the Partnership or otherwise
provide funds to enable the Partnership to fund its obligations under this
Section 7.7.

                  B. Reasonable expenses incurred by an Indemnitee who is a
party to a proceeding may be paid or reimbursed by the Partnership in advance of
the final disposition of the proceeding upon receipt by the Partnership of (i) a
written affirmation by the Indemnitee of the Indemnitee's good faith belief that
the standard of conduct necessary for indemnification by the Partnership as
authorized in Section 7.7.A has been met and (ii) a written undertaking by or on
behalf of the Indemnitee to repay the amount if it shall ultimately be
determined that the standard of conduct has not been met.

                  C. The indemnification provided by this Section 7.7 shall be
in addition to any other rights to which an Indemnitee or any other Person may
be entitled under any agreement, pursuant to any vote of the Partners, as a
matter of law or otherwise, and shall continue as to an Indemnitee who has
ceased to serve in such capacity.

                  D. The Partnership may purchase and maintain insurance, on
behalf of the Indemnitees and such other Persons as the General Partner shall
determine, against any liability that may be asserted against or expenses that
may be incurred by any such Person in connection with the Partnership's
activities, regardless of whether the Partnership would have the power to
indemnify such Person against such liability under the provisions of this
Agreement.

                  E. For purposes of this Section 7.7, the Partnership shall be
deemed to have requested an Indemnitee to serve as fiduciary of an employee
benefit plan whenever the performance by it of its duties to the Partnership
also imposes duties on, or otherwise involves services by, it to the plan or
participants or beneficiaries of the plan; excise taxes assessed on an
Indemnitee with respect to an employee benefit plan pursuant to applicable law
shall constitute fines within the meaning of Section 7.7; and actions taken or
omitted by the Indemnitee with respect to an employee benefit plan in the
performance of its duties for a purpose reasonably believed by it to be in the
interest of the participants and beneficiaries of the plan shall be deemed to be
for a purpose which is not opposed to the best interests of the Partnership.

                  F. In no event may an Indemnitee subject the Limited Partners
to personal liability by reason of the indemnification provisions set forth in
this Agreement.

                  G. An Indemnitee shall not be denied indemnification in whole
or in part under this Section 7.7 because the Indemnitee had an interest in the
transaction with respect to which the indemnification applies if the transaction
was otherwise permitted by the terms of this Agreement.

                  H. The provisions of this Section 7.7 are for the benefit of
the Indemnitees, their heirs, successors, assigns and administrators and shall
not be deemed to create any rights for the benefit of any other Persons. Any
amendment, modification or repeal of this Section 7.7 or

                                       45
<PAGE>   51

any provision hereof shall be prospective only and shall not in any way affect
the limitations on the Partnership's liability to any Indemnitee under this
Section 7.7 as in effect immediately prior to such amendment, modification or
repeal with respect to claims arising from or relating to matters occurring, in
whole or in part, prior to such amendment, modification or repeal, regardless of
when such claims may arise or be asserted.

                  I. If and to the extent any reimbursements to the General
Partner pursuant to this Section 7.7 constitute gross income of the General
Partner (as opposed to the repayment of advances made by the General Partner on
behalf of the Partnership) such amounts shall constitute guaranteed payments
within the meaning of Section 707(c) of the Code, shall be treated consistently
therewith by the Partnership and all Partners, and shall not be treated as
distributions for purposes of computing the Partners' Capital Accounts.

                  J. Any indemnification hereunder is subject to, and limited
by, the provisions of Section 17-108 of the Act.

                  K. In the event the Partnership is made a party to any
litigation or otherwise incurs any loss or expense as a result of or in
connection with any Partner's personal obligations or liabilities unrelated to
Partnership business, such Partner shall indemnify and reimburse the Partnership
for all such loss and expense incurred, including legal fees, and the
Partnership Interest of such Partner may be charged therefor. The liability of a
Partner under this Section 7.7.K shall not be limited to such Partner's
Partnership Interest, but shall be enforceable against such Partner personally.

                  Section 7.8. Liability of the General Partner

                  A. Notwithstanding anything to the contrary set forth in this
Agreement, none of the General Partner and any of its officers, directors,
agents and employees shall be liable or accountable in damages or otherwise to
the Partnership, any Partners or any Assignees, or their successors or assigns,
for losses sustained, liabilities incurred or benefits not derived as a result
of errors in judgment or mistakes of fact or law or any act or omission if the
General Partner acted in good faith.

                  B. The Limited Partners expressly acknowledge that the General
Partner is acting for the benefit of the Partnership, the Limited Partners and
the General Partner's stockholders collectively, that the General Partner is
under no obligation to give priority to the separate interests of the Limited
Partners or the General Partner's stockholders (including, without limitation,
the tax consequences to Limited Partners or Assignees or to stockholders) in
deciding whether to cause the Partnership to take (or decline to take) any
actions and that the General Partner shall not be liable to the Partnership or
to any Limited Partner for monetary damages for losses sustained, liabilities
incurred, or benefits not derived by Limited Partners in connection with such
decisions; provided, that the General Partner has acted in good faith.

                  C. Subject to its obligations and duties as General Partner
set forth in Section 7.1.A, the General Partner may exercise any of the powers
granted to it by this Agreement and perform any of the duties imposed upon it
hereunder either directly or by or through its agents.

                                       46
<PAGE>   52

The General Partner shall not be responsible for any misconduct or negligence on
the part of any such agent appointed by it in good faith.

                  D. Any amendment, modification or repeal of this Section 7.8
or any provision hereof shall be prospective only and shall not in any way
affect the limitations on the liability of the General Partner and any of its
officers, directors, agents and employees to the Partnership and the Limited
Partners under this Section 7.8 as in effect immediately prior to such
amendment, modification or repeal with respect to claims arising from or
relating to matters occurring, in whole or in part, prior to such amendment,
modification or repeal, regardless of when such claims may arise or be asserted.

                  Section 7.9. Other Matters Concerning the General Partner

                  A. The General Partner may rely and shall be protected in
acting or refraining from acting upon any resolution, certificate, statement,
instrument, opinion, report, notice, request, consent, order, bond, debenture,
or other paper or document believed by it to be genuine and to have been signed
or presented by the proper party or parties.

                  B. The General Partner may consult with legal counsel,
accountants, appraisers, management consultants, investment bankers and other
consultants and advisers selected by it, and any act taken or omitted to be
taken in reliance upon the opinion of such Persons as to matters which such
General Partner reasonably believes to be within such Person's professional or
expert competence shall be conclusively presumed to have been done or omitted in
good faith and in accordance with such opinion.

                  C. The General Partner shall have the right, in respect of any
of its powers or obligations hereunder, to act through any of its duly
authorized officers and a duly appointed attorney or attorneys-in-fact. Each
such attorney shall, to the extent provided by the General Partner in the power
of attorney, have full power and authority to do and perform all and every act
and duty which is permitted or required to be done by the General Partner
hereunder.

                  D. Notwithstanding any other provisions of this Agreement or
any non-mandatory provision of the Act, any action of the General Partner on
behalf of the Partnership or any decision of the General Partner to refrain from
acting on behalf of the Partnership, undertaken in the good faith belief that
such action or omission is necessary or advisable in order to protect the
ability of AMB, in its capacity as the sole stockholder of the General Partner
and as the sole general partner of the Operating Partnership, for so long as AMB
has determined to qualify as a REIT, to (i) continue to qualify as a REIT or
(ii) except with respect to the distribution of Available Cash to the Series C
Limited Partners, the Series D Limited Partners, the Series E Limited Partners,
the Series F Limited Partners, the Series G Limited Partners, the Series H
Limited Partners and the Series I Limited Partners in accordance in accordance
with Sections 16.3, 17.3, 18.3, 19.3, 20.3, 21.3 and 22.3, respectively, avoid
AMB incurring any taxes under Section 857 or Section 4981 of the Code, is
expressly authorized under this Agreement and is deemed approved by all of the
Limited Partners.

                  E. So long as the General Partner holds any interest in the
Partnership (as either a General Partner or Limited Partner), the General
Partner shall have "management rights"

                                       47
<PAGE>   53

(as such term is defined in the Plan Asset Regulation) with respect to the
Partnership and its Properties to the extent necessary to qualify AMB as a
"venture capital operating company" (as such term is defined in the Plan Asset
Regulation).

                  Section 7.10. Title to Partnership Assets

                  Title to Partnership assets, whether real, personal or mixed
and whether tangible or intangible, shall be deemed to be owned by the
Partnership as an entity, and no Partners, individually or collectively, shall
have any ownership interest in such Partnership assets or any portion thereof.
Title to any or all of the Partnership assets may be held in the name of the
Partnership, the General Partner or one or more nominees, as the General Partner
may determine, including Affiliates of the General Partner. The General Partner
hereby declares and warrants that any Partnership assets for which legal title
is held in the name of the General Partner or any nominee or Affiliate of the
General Partner shall be deemed held by the General Partner or such nominee or
Affiliate for the use and benefit of the Partnership in accordance with the
provisions of this Agreement; provided, however, that the General Partner shall
use its best efforts to cause beneficial and record title to such assets to be
vested in the Partnership as soon as reasonably practicable. All Partnership
assets shall be recorded as the property of the Partnership in its books and
records, irrespective of the name in which legal title to such Partnership
assets is held.

                  Section 7.11. Reliance by Third Parties

                  Notwithstanding anything to the contrary in this Agreement,
any Person dealing with the Partnership shall be entitled to assume that the
General Partner has full power and authority to encumber, sell or otherwise use
in any manner any and all assets of the Partnership and to enter into any
contracts on behalf of the Partnership, and such Person shall be entitled to
deal with the General Partner as if it were the Partnership's sole party in
interest, both legally and beneficially. Each Limited Partner hereby waives any
and all defenses or other remedies which may be available against such Person to
contest, negate or disaffirm any action of the General Partner in connection
with any such dealing. In no event shall any Person dealing with the General
Partner or its representatives be obligated to ascertain that the terms of this
Agreement have been complied with or to inquire into the necessity or expedience
of any act or action of the General Partner or its representatives. Each and
every certificate, document or other instrument executed on behalf of the
Partnership by the General Partner or its representatives shall be conclusive
evidence in favor of any and every Person relying thereon or claiming thereunder
that (i) at the time of the execution and delivery of such certificate, document
or instrument, this Agreement was in full force and effect, (ii) the Person
executing and delivering such certificate, document or instrument was duly
authorized and empowered to do so for and on behalf of the Partnership and (iii)
such certificate, document or instrument was duly executed and delivered in
accordance with the terms and provisions of this Agreement and is binding upon
the Partnership.

                                       48
<PAGE>   54

                                   ARTICLE 8.
                   RIGHTS AND OBLIGATIONS OF LIMITED PARTNERS

                  Section 8.1. Limitation of Liability

                  The Limited Partners shall have no liability under this
Agreement except as expressly provided in this Agreement or under the Act.

                  Section 8.2. Management of Business

                  No Limited Partner or Assignee (other than the General
Partner, any of its Affiliates or any officer, director, employee, general
partner, agent or trustee of the General Partner, the Partnership or any of
their Affiliates, in their capacity as such) shall take part in the operations,
management or control (within the meaning of the Act) of the Partnership's
business, transact any business in the Partnership's name or have the power to
sign documents for or otherwise bind the Partnership. Notwithstanding the
foregoing, the General Partner may be removed by the Limited Partners, pursuant
to and in accordance with Section 7.1. Upon the removal of the General Partner,
the Common Limited Partners shall select a successor General Partner, who shall
upon the acceptance of such selection be admitted as a successor General Partner
pursuant to Section 12.1 hereof. The transaction of any such business by the
General Partner, any of its Affiliates or any officer, director, employee,
general partner, agent or trustee of the General Partner, the Partnership or any
of their Affiliates, in their capacity as such, shall not affect, impair or
eliminate the limitations on the liability of the Limited Partners or Assignees
under this Agreement.

                  Section 8.3. Outside Activities of Limited Partners

                  Subject to any agreements entered into by a Limited Partner or
its Affiliates with the General Partner, Partnership or a Subsidiary, any
Limited Partner and any officer, director, employee, agent, trustee, Affiliate
or stockholder of any Limited Partner shall be entitled to and may have business
interests and engage in business activities in addition to those relating to the
Partnership, including business interests and activities in direct competition
with the Partnership or that are enhanced by the activities of the Partnership.
Neither the Partnership nor any Partners shall have any rights by virtue of this
Agreement in any business ventures of any Limited Partner or Assignee. Subject
to such agreements, none of the Limited Partners nor any other Person shall have
any rights by virtue of this Agreement or the partnership relationship
established hereby in any business ventures of any other Person, other than the
Limited Partners benefiting from the business conducted by the General Partner,
and such other Person shall have no obligation pursuant to this Agreement to
offer any interest in any such business ventures to the Partnership, any Limited
Partner or any such other Person, even if such opportunity is of a character
which, if presented to the Partnership, any Limited Partner or such other
Person, could be taken by such other Person.

                  Section 8.4.      Return of Capital

                  Except pursuant to the Series C Redemption and exchange rights
set forth in Sections 16.5 and 16.8, the Series D Redemption and exchange rights
set forth in Sections 17.5

                                       49
<PAGE>   55

and 17.8, the Series E Redemption and exchange rights set forth in Sections 18.5
and 18.8, the Series F Redemption and exchange rights set forth in Sections 19.5
and 19.8, the Series G Redemption and exchange rights set forth in Sections 20.5
and 20.8, the Series H Redemption and exchange rights set forth in Sections 21.5
and 21.8 and the Series I Redemption and exchange rights set forth in Sections
22.5 and 22.8 no Limited Partner shall be entitled to the withdrawal or return
of his or her Capital Contribution, except to the extent of distributions made
pursuant to this Agreement or upon termination of the Partnership as provided
herein. Except as expressly set forth herein with respect to the rights,
priorities and preferences of the Preferred Limited Partners holding any series
of Preferred Units, no Limited Partner or Assignee shall have priority over any
other Limited Partner or Assignee either as to the return of Capital
Contributions, or as otherwise expressly provided in this Agreement, as to
profits, losses, distributions or credits.

                  Section 8.5. Rights of Limited Partners Relating to the
Partnership

                  A. In addition to other rights provided by this Agreement or
by the Act, and except as limited by Section 8.5.B, each Limited Partner shall
have the right, for a purpose reasonably related to such Limited Partner's
interest as a limited partner in the Partnership, upon written demand with a
statement of the purpose of such demand and at the Partnership's expense:

                  (i)      to obtain a copy of the most recent annual and
                           quarterly reports filed with the Securities and
                           Exchange Commission by AMB pursuant to the Exchange
                           Act, and each communication sent to the stockholders
                           of AMB;

                  (ii)     to obtain a copy of the Partnership's Federal, state
                           and local income tax returns for each Partnership
                           Year;

                  (iii)    to obtain a current list of the name and last known
                           business, residence or mailing address of each
                           Partner;

                  (iv)     to obtain a copy of this Agreement and the
                           Certificate and all amendments thereto, together with
                           executed copies of all powers of attorney pursuant to
                           which this Agreement, the Certificate and all
                           amendments thereto have been executed; and

                  (v)      to obtain true and full information regarding the
                           amount of cash and a description and statement of any
                           other property or services contributed by each
                           Partner and which each Partner has agreed to
                           contribute in the future, and the date on which each
                           became a Partner.

                  B. Notwithstanding any other provision of this Section 8.5,
the General Partner may keep confidential from the Limited Partners, for such
period of time as the General Partner determines in its sole and absolute
discretion to be reasonable, any information that (i) the General Partner
believes to be in the nature of trade secrets or other information the
disclosure of which the General Partner in good faith believes is not in the
best interests of the Partnership or (ii) the Partnership or the General Partner
is required by law or by agreements with unaffiliated third parties to keep
confidential.

                                       50
<PAGE>   56

                                   ARTICLE 9.
                     BOOKS, RECORDS, ACCOUNTING AND REPORTS

                  Section 9.1. Records and Accounting

                  The General Partner shall keep or cause to be kept at the
principal office of the Partnership appropriate books and records with respect
to the Partnership's business, including without limitation, all books and
records necessary to provide to the Limited Partners any information, lists and
copies of documents required to be provided pursuant to Section 9.3. Any records
maintained by or on behalf of the Partnership in the regular course of its
business may be kept on, or be in the form of, punch cards, magnetic tape,
photographs, micrographics or any other information storage device; provided,
that the records so maintained are convertible into clearly legible written form
within a reasonable period of time. The books of the Partnership shall be
maintained, for financial and tax reporting purposes, on an accrual basis in
accordance with generally accepted accounting principles.

                  Section 9.2. Fiscal Year

                  The fiscal year of the Partnership shall be the calendar year.

                  Section 9.3. Reports

                  A. (1) As soon as practicable, but in no event later than the
earlier to occur of (a) 105 days after the close of each Partnership Year and
(b) five (5) business days following the date on which Company files its annual
report in respect of a fiscal year on Form 10-K, or such other applicable form
("Form 10-K"), with the Securities and Exchange Commission (the "Commission"), a
complete copy of AMB's audited financial statements for such fiscal year
including a balance sheet, income statement and cash flow statement for such
fiscal year prepared and audited by an independent nationally recognized firm of
certified public accountants in accordance with GAAP and (2) not later than
fifteen (15) days after the date documents are delivered in clause (A)(1) above,
the consolidating balance sheet, cash flow statement and income statement of the
Operating Partnership for such fiscal year, prepared by AMB; and

                  B. (1) As soon as practicable, but in no event later than five
(5) business days following the date on which AMB files its quarterly report in
respect of a fiscal quarter on Form 10-Q, or such other applicable form ("Form
10-Q"), with the Commission, a complete copy of AMB's unaudited quarterly
financial statements for such fiscal quarter including a balance sheet, income
statement and cash flow statement for such fiscal quarter prepared in accordance
with GAAP and (2) not later than fifteen (15) days after the date documents are
delivered in clause (B)(1) above, the consolidating balance sheet, cash flow
statement and income statement of the Operating Partnership for such fiscal
quarter, prepared and certified by AMB.

                  Section 9.4. Nondisclosure of Certain Information

                  Notwithstanding the provisions of Sections 9.1 and 9.3, the
General Partner may keep confidential from the Limited Partners any information
that the General Partner believes to

                                       51
<PAGE>   57

be in the nature of trade secrets or other information the disclosure of which
the General Partner in good faith believes is not in the best interests of the
Partnership or which the Partnership is required by law or by agreements with
unaffiliated third parties to keep confidential.

                                   ARTICLE 10.
                                   TAX MATTERS

                  Section 10.1. Preparation of Tax Returns

                  The General Partner shall arrange for the preparation and
timely filing of all returns of Partnership income, gains, deductions, losses
and other items required of the Partnership for Federal and state income tax
purposes and shall use all reasonable efforts to furnish, within ninety (90)
days of the close of each taxable year, the tax information reasonably required
by Limited Partners for Federal and state income tax reporting purposes. Each
Limited Partner shall promptly provide the General Partner with such information
relating to any Contributed Property contributed by such Limited Partner to the
Partnership.

                  Section 10.2. Tax Elections

                  Except as otherwise provided herein, the General Partner
shall, in its sole and absolute discretion, determine whether to make any
available election pursuant to the Code, including the election under Section
754 of the Code. The General Partner shall have the right to seek to revoke any
such election (including without limitation, any election under Section 754 of
the Code) upon the General Partner's determination in its sole and absolute
discretion that such revocation is the best interests of the Partners.

                  Section 10.3. Tax Matters Partner

                  A. The General Partner shall be the "tax matters partner" of
the Partnership for Federal income tax purposes. Pursuant to Section 6223(c) of
the Code, upon receipt of notice from the IRS of the beginning of an
administrative proceeding with respect to the Partnership, the tax matters
partner shall furnish the IRS with the name, address and profit interest of each
of the Limited Partners and Assignees; provided, however, that such information
is provided to the Partnership by the Limited Partners and Assignees.

                  B.       The tax matters partner is authorized, but not
                           required:

                  (i)      to enter into any settlement with the IRS with
                           respect to any administrative or judicial proceedings
                           for the adjustment of Partnership items required to
                           be taken into account by a Partner for income tax
                           purposes (such administrative proceedings being
                           referred to as a "tax audit" and such judicial
                           proceedings being referred to as "judicial review"),
                           and in the settlement agreement the tax matters
                           partner may expressly state that such agreement shall
                           bind all Partners, except that such settlement
                           agreement shall not bind any Partner (a) who (within
                           the time prescribed pursuant to the Code and
                           Regulations) files a statement with the IRS providing
                           that the tax matters partner shall not have the
                           authority to enter into a

                                       52
<PAGE>   58

                           settlement agreement on behalf of such Partner or (b)
                           who is a "notice partner" (as defined in Section 6231
                           of the Code) or a member of a "notice group" (as
                           defined in Section 6223(b)(2) of the Code);

                  (ii)     in the event that a notice of a final administrative
                           adjustment at the Partnership level of any item
                           required to be taken into account by a Partner for
                           tax purposes (a "final adjustment") is mailed to the
                           tax matters partner, to seek judicial review of such
                           final adjustment, including the filing of a petition
                           for readjustment with the Tax Court or the United
                           States Claims Court, or the filing of a complaint for
                           refund with the District Court of the United States
                           for the district in which the Partnership's principal
                           place of business is located;

                  (iii)    to intervene in any action brought by any other
                           Partner for judicial review of a final adjustment;

                  (iv)     to file a request for an administrative adjustment
                           with the IRS at any time and, if any part of such
                           request is not allowed by the IRS, to file an
                           appropriate pleading (petition or complaint) for
                           judicial review with respect to such request;

                  (v)      to enter into an agreement with the IRS to extend the
                           period for assessing any tax which is attributable to
                           any item required to be taken into account by a
                           Partner for tax purposes, or an item affected by such
                           item; and

                  (vi)     to take any other action on behalf of the Partners of
                           the Partnership in connection with any tax audit or
                           judicial review proceeding to the extent permitted by
                           applicable law or regulations.

                  The taking of any action and the incurring of any expense by
the tax matters partner in connection with any such proceeding, except to the
extent required by law, is a matter in the sole and absolute discretion of the
tax matters partner and the provisions relating to indemnification of the
General Partner set forth in Section 7.7 shall be fully applicable to the tax
matters partner in its capacity as such.

                  C. The tax matters partner shall receive no compensation for
its services. All third party costs and expenses incurred by the tax matters
partner in performing its duties as such (including legal and accounting fees)
shall be borne by the Partnership. Nothing herein shall be construed to restrict
the Partnership from engaging an accounting firm to assist the tax matters
partner in discharging its duties hereunder, so long as the compensation paid by
the Partnership for such services is reasonable.

                  Section 10.4. Organizational Expenses

                  The Partnership shall elect to deduct expenses, if any,
incurred by it in organizing the Partnership ratably over a sixty (60) month
period as provided in Section 709 of the Code.

                                       53
<PAGE>   59

                  Section 10.5. Withholding

                  Each Limited Partner hereby authorizes the Partnership to
withhold from or pay on behalf of or with respect to such Limited Partner any
amount of Federal, state, local, or foreign taxes that the General Partner
determines that the Partnership is required to withhold or pay with respect to
any amount distributable or allocable to such Limited Partner pursuant to this
Agreement, including, without limitation, any taxes required to be withheld or
paid by the Partnership pursuant to Sections 1441, 1442, 1445 or 1446 of the
Code. Any amount paid on behalf of or with respect to a Limited Partner shall
constitute a loan by the Partnership to such Limited Partner, which loan shall
be repaid by such Limited Partner within fifteen (15) days after notice from the
General Partner that such payment must be made unless (i) the Partnership
withholds such payment from a distribution which would otherwise be made to the
Limited Partner or (ii) the General Partner determines, in its sole and absolute
discretion, that such payment may be satisfied out of the available funds of the
Partnership which would, but for such payment, be distributed to the Limited
Partner. Any amounts withheld pursuant to the foregoing clauses (i) or (ii)
shall be treated as having been distributed to such Limited Partner. Each
Limited Partner hereby unconditionally and irrevocably grants to the Partnership
a security interest in such Limited Partner's Partnership Interest to secure
such Limited Partner's obligation to pay to the Partnership any amounts required
to be paid pursuant to this Section 10.5. In the event that a Limited Partner
fails to pay any amounts owed to the Partnership pursuant to this Section 10.5
when due, the General Partner may, in its sole and absolute discretion, elect to
make the payment to the Partnership on behalf of such defaulting Limited
Partner, and in such event shall be deemed to have loaned such amount to such
defaulting Limited Partner and shall succeed to all rights and remedies of the
Partnership as against such defaulting Limited Partner (including, without
limitation, the right to receive distributions and the holding of a security
interest in such Limited Partner's Partnership Interest). Any amounts payable by
a Limited Partner hereunder shall bear interest at the base rate on corporate
loans at large United States money center commercial banks, as published from
time to time in the Wall Street Journal, plus two percentage points (but not
higher than the maximum lawful rate) from the date such amount is due (i.e., 15
days after demand) until such amount is paid in full. Each Limited Partner shall
take such actions as the Partnership or the General Partner shall request in
order to perfect or enforce the security interest created hereunder.

                                   ARTICLE 11.
                            TRANSFERS AND WITHDRAWALS

                  Section 11.1. Transfer

                  A. The term "transfer," when used in this Article 11 with
respect to a Partnership Interest, shall be deemed to refer to a transaction by
which the General Partner purports to assign its General Partner Interest to
another Person or by which a Limited Partner purports to assign its Limited
Partnership Interest to another Person, and includes a sale, assignment, gift
(outright or in trust), pledge, encumbrance, hypothecation, mortgage, exchange
or any other disposition by law or otherwise. Except to the extent otherwise
specified, the term "transfer" when used in this Article 11 does not include any
exchange for Series C Preferred Shares pursuant to Section 16.8, any exchange
for Series D Preferred Shares pursuant to Section

                                       54
<PAGE>   60

17.8, any exchange for Series E Preferred Shares pursuant to Section 18.8, any
exchange for Series F Preferred Shares pursuant to Section 19.8, any exchange
for Series G Preferred Shares pursuant to Section 20.8, any exchange for Series
H Preferred Shares pursuant to Section 21.8, or any exchange for Series I
Preferred Shares pursuant to Section 22.8. No part of the interest of a Limited
Partner shall be subject to the claims of any creditor, any spouse for alimony
or support, or to legal process, and may not be voluntarily or involuntarily
alienated or encumbered, except as may be specifically provided for in this
Agreement.

                  B. No Partnership Interest shall be transferred, in whole or
in part, except in accordance with the terms and conditions set forth in this
Article 11. Any transfer or purported transfer of a Partnership Interest not
made in accordance with this Article 11 shall be null and void ab initio unless
otherwise consented by the General Partner in its sole and absolute discretion.

                  Section 11.2. Transfer of General Partner's and Common Limited
Partner's Partnership Interest

                  A. The General Partner shall not withdraw from the Partnership
and shall not transfer all or any portion of its interest in the Partnership
(whether by sale, statutory merger, consolidation, liquidation or otherwise).
Any attempted transfer of the General Partner Interest shall be void ab initio.
To the extent the prior sentence does not have the effect of preventing any such
proposed transfer, the transfer shall cause the dissolution of the Partnership.

                  B. Except as otherwise provided in this Section 11.2.B, no
Common Limited Partner shall withdraw from or transfer all or any portion of its
interest in the Partnership (whether by sale, statutory merger, consolidation,
liquidation or otherwise). Any attempted transfer of a Common Limited Partner
Interest contrary to this Section 11.2.B shall be void ab initio. To the extent
the prior sentence does not have the effect of preventing any such proposed
transfer, the transfer shall cause the dissolution of the Partnership.

                  C. Notwithstanding Section 11.2.B, any Common Limited Partner
other than the Operating Partnership shall be permitted to transfer, with the
consent of the General Partner (which consent may be given or withheld in the
General Partner's sole and absolute discretion), all or any portion of its
Partnership Interest to the Operating Partnership.

                  Section 11.3. Preferred Limited Partners' Rights to Transfer

                  A. Any Preferred Limited Partner may, at any time without the
consent of the General Partner, (i) transfer all or any portion of its
Partnership Interest to the General Partner, (ii) transfer all or any portion of
its Partnership Interest to an Affiliate controlled thereby or to an Immediate
Family member, subject to the provisions of Section 11.6, (iii) transfer all or
any portion of its Partnership Interest to a trust for the benefit of a
charitable beneficiary or to a charitable foundation, subject to the provisions
of Section 11.6 and (iv) subject to the provisions of Section 11.6, (a) pledge
(a "Pledge") all or any portion of its Partnership Interest to a lending
institution, which is not an Affiliate of such Preferred Limited Partner, as
collateral or security for a bona fide loan or other extension of credit, or (b)
transfer such pledged Partnership Interest to such lending institution in
connection with the exercise of remedies under such loan or

                                       55
<PAGE>   61

extension of credit. In addition, each Preferred Limited Partner or Assignee
(resulting from a transfer made pursuant to clauses (i)-(iv) of the preceding
sentence) shall have the right to transfer all or any portion of its Partnership
Interest, subject to the provisions of Section 11.6, provided that any transfer
of a Partnership Interest shall be made only to Qualified Transferees.

                  It is a condition to any transfer otherwise permitted
hereunder that the transferee assumes by operation of law or express agreement
all of the obligations of the transferor Preferred Limited Partner under this
Agreement with respect to such transferred Partnership Interest and no such
transfer (other than pursuant to a statutory merger or consolidation wherein all
obligations and liabilities of the transferor Partner are assumed by a successor
corporation by operation of law) shall relieve the transferor Partner of its
obligations under this Agreement without the approval of the General Partner, in
its reasonable discretion. Notwithstanding the foregoing, any transferee of any
transferred Partnership Interest shall be subject to any and all ownership
limitations contained in the REIT Charter, which may limit or restrict such
transferee's ability to exercise its Series C Redemption rights or the exchange
rights set forth in Sections 16.5 or 16.8, respectively, its Series D Redemption
rights or the exchange rights set forth in Sections 17.5 or 17.8, respectively,
its Series E Redemption rights or the exchange rights set forth in Sections 18.5
or 18.8, respectively, its Series F Redemption rights or the exchange rights set
forth in Sections 19.5 or 19.8, respectively, its Series G Redemption rights or
the exchange rights set forth in Sections 20.5 or 20.8, respectively, its Series
H Redemption rights or the exchange rights set forth in Sections 21.5 or 21.8,
respectively, or its Series I Redemption rights or the exchange rights set forth
in Sections 22.5 or 22.8, respectively, and to the representations set forth in
Section 3.4.D. Any transferee, whether or not admitted as a Substituted Limited
Partner, shall take subject to the obligations of the transferor hereunder.
Unless admitted as a Substituted Limited Partner, no transferee, whether by a
voluntary transfer, by operation of law or otherwise, shall have any rights
hereunder, other than the rights of an Assignee as provided in Section 11.5.

                  B. If a Preferred Limited Partner is subject to Incapacity,
the executor, administrator, trustee, committee, guardian, conservator, or
receiver of such Limited Partner's estate shall have all the rights of a
Preferred Limited Partner, but not more rights than those enjoyed by other
Preferred Limited Partners, for the purpose of settling or managing the estate,
and such power as the Incapacitated Preferred Limited Partner possessed to
transfer all or any part of his or its interest in the Partnership. The
Incapacity of a Limited Partner, in and of itself, shall not dissolve or
terminate the Partnership.

                  C. The General Partner may prohibit any transfer otherwise
permitted under this Section 11.3 by a Preferred Limited Partner of his or her
Partnership Units if, in the opinion of legal counsel to the Partnership, such
transfer would require the filing of a registration statement under the
Securities Act by the Partnership or would otherwise violate any Federal or
state securities laws or regulations applicable to the Partnership or the
Partnership Unit.

                  D. No transfer by a Preferred Limited Partner of his or her
Partnership Units (including any Series C Redemption or exchange rights set
forth in Sections 16.5 and 16.8, respectively, any Series D Redemption or
exchange rights set forth in Sections 17.5 and 17.8, respectively, any Series E
Redemption or exchange rights set forth in Sections 18.5 and 18.8,

                                       56
<PAGE>   62

respectively, any Series F Redemption or exchange rights set forth in Sections
19.5 and 19.8, respectively, any Series G Redemption or exchange rights set
forth in Sections 20.5 and 20.8, respectively, any Series H Redemption or
exchange rights set forth in Sections 21.5 and 21.8, respectively, any Series I
Redemption or exchange rights set forth in Sections 22.5 and 22.8, respectively,
or any other acquisition of Common Units, Series C Preferred Units, Series D
Preferred Units, Series E Preferred Units, Series F Preferred Units, Series G
Preferred Units, Series H Preferred Units or Series I Preferred Units by the
General Partner, AMB or the Partnership) may be made to any person if (i) in the
opinion of legal counsel for the Partnership, it could result in the Partnership
being treated as an association taxable as a corporation or (ii) absent the
consent of the General Partner, which may be given or withheld in its sole and
absolute discretion, such transfer could be treated as effectuated through an
"established securities market" or a "secondary market (or the substantial
equivalent thereof)" within the meaning of Section 7704 of the Code.

                  E. No transfer of any Preferred Partnership Units may be made
to a lender to the Partnership or any Person who is related (within the meaning
of Section 1.752-4(b) of the Regulations) to any lender to the Partnership whose
loan constitutes a Nonrecourse Liability, without the consent of the General
Partner, in its sole and absolute discretion; provided, that as a condition to
such consent, the lender will be required to enter into an arrangement with the
Partnership and the General Partner to redeem or exchange for the specified
amount of Series C Preferred Shares, Series D Preferred Shares, Series E
Preferred Shares, Series F Preferred Shares, Series G Preferred Shares, Series H
Preferred Shares and/or Series I Preferred Shares (as the case may be) any
Partnership Units in which a security interest is held simultaneously with the
time at which such lender would be deemed to be a partner in the Partnership for
purposes of allocating liabilities to such lender under Section 752 of the Code.

                  F. No Preferred Limited Partner may withdraw from the
Partnership except as a result of transfer, Series C Redemption, Series D
Redemption, Series E Redemption, Series F Redemption, Series G Redemption,
Series H Redemption, Series I Redemption or exchange of all of its Partnership
Units pursuant hereto.

                  Section 11.4. Substituted Limited Partners

                  A. Any Preferred Limited Partner shall have the right to
substitute a transferee permitted by this Agreement as a Limited Partner in his
or her place. The General Partner shall have the right to consent to the
admission of a permitted transferee of the interest of any other Limited
Partner, as a Substituted Limited Partner, pursuant to this Section 11.4, which
consent may be given or withheld by the General Partner in its sole and absolute
discretion. The General Partner's failure or refusal to permit a transferee of
any such interests to become a Substituted Limited Partner shall not give rise
to any cause of action against the Partnership or any Partner.

                  B. A transferee who has been admitted as a Substituted Limited
Partner in accordance with this Article 11 shall have all the rights and powers
and be subject to all the restrictions and liabilities of a Limited Partner
under this Agreement. The admission of any transferee as a Substituted Limited
Partner shall be subject to the transferee executing and

                                       57
<PAGE>   63

delivering to the Partnership an acceptance of all of the terms and conditions
of this Agreement (including, without limitation, the provisions of Section 2.4
and such other documents or instruments as may be required to effect the
admission, each in form and substance satisfactory to the General Partner) and
the acknowledgment by such transferee that each of the representations and
warranties set forth in Section 3.4 are true and correct with respect to such
transferee as of the date of the transfer of the Partnership Interest to such
transferee and will continue to be true to the extent required by such
representations and warranties.

                  C. Upon the admission of a Substituted Limited Partner, the
General Partner shall amend Exhibit A to reflect the name, address, number of
Partnership Units, and Percentage Interest of such Substituted Limited Partner
and to eliminate or adjust, if necessary, the name, address and interest of the
predecessor of such Substituted Limited Partner.

                  Section 11.5. Assignees

                  If the General Partner, with respect to a transferee requiring
the General Partner's consent, does not consent, in its sole and absolute
discretion, to the admission of any permitted transferee under Section 11.3 as a
Substituted Limited Partner, as described in Section 11.4, such transferee shall
be considered an Assignee for purposes of this Agreement. An Assignee shall be
entitled to all the rights of an assignee of a limited partnership interest
under the Act, including the right to receive distributions from the Partnership
and the share of Net Income, Net Losses, gain and loss attributable to the
Partnership Units assigned to such transferee, the rights to transfer the
Partnership Units provided in this Article 11, the right of exchange for Series
C Preferred Shares set forth in Section 16.8, the right of exchange for Series D
Preferred Shares set forth in Section 17.8, the right of exchange for Series E
Preferred Shares set forth in Section 18.8, the right of exchange for Series F
Preferred Shares set forth in Section 19.8, the right of exchange for Series G
Preferred Shares set forth in Section 20.8, the right of exchange for Series H
Preferred Shares set forth in Section 21.8, and the right of exchange for Series
I Preferred Shares set forth in Section 22.8, but shall not be deemed to be a
holder of Partnership Units for any other purpose under this Agreement, and
shall not be entitled to effect a Consent with respect to such Partnership Units
on any matter presented to the Limited Partners for approval (such Consent
remaining with the transferor Limited Partner). In the event any such transferee
desires to make a further assignment of any such Partnership Units, such
transferee shall be subject to all the provisions of this Article 11 to the same
extent and in the same manner as any Limited Partner desiring to make an
assignment of Partnership Units. Notwithstanding anything contained in this
Agreement to the contrary, as a condition to becoming an Assignee, any
prospective Assignee must first execute and deliver to the Partnership an
acknowledgment that each of the representations and warranties set forth in
Section 3.4 hereof are true and correct with respect to such prospective
Assignee as of the date of the prospective assignment of the Partnership
Interest to such prospective Assignee and will continue to be true to the extent
required by such representations or warranties.

                  Section 11.6. General Provisions

                  A. No Limited Partner may withdraw from the Partnership other
than as a result of (i) a transfer of all of such Limited Partner's Partnership
Units as permitted in

                                       58
<PAGE>   64

accordance with this Article 11 and the transferee(s) of such Units being
admitted to the Partnership as a Substituted Limited Partner(s), (ii) pursuant
to the Series C Redemption or exchange of all of such Limited Partner's Series C
Preferred Units pursuant to Section 16.8, (iii) pursuant to the Series D
Redemption or exchange of all of such Limited Partner's Series D Preferred Units
pursuant to Section 17.8, (iv) pursuant to the Series E Redemption or exchange
of all of such Limited Partner's Series E Preferred Units pursuant to Section
18.8, (v) pursuant to the Series F Redemption or exchange of all such Limited
Partner's Series F Preferred Units pursuant to Section 19.8, (vi) pursuant to
the Series G Redemption or exchange of all such Limited Partner's Series G
Preferred Units pursuant to Section 20.8, (vii) pursuant to the Series H
Redemption or exchange of all such Limited Partner's Series H Preferred Units
pursuant to Section 21.8, or (viii) pursuant to the Series I Redemption or
exchange of all such Limited Partner's Series I Preferred Units pursuant to
Section 22.8; provided further that in connection with any such redemption or
exchange, the applicable Limited Partner thereafter owns no Partnership
Interest.

                  B. Any Limited Partner who shall transfer all of such Limited
Partner's Partnership Units in a transfer permitted pursuant to this Article 11
where such transferee was admitted as a Substituted Limited Partner or pursuant
to the exercise of its rights of Series C Redemption or exchange of all of such
Limited Partner's Series C Preferred Units pursuant to Section 16.8, pursuant to
the exercise of its rights of Series D Redemption or exchange of all of such
Limited Partner's Series D Preferred Units pursuant to Section 17.8, pursuant to
the exercise of its rights of Series E Redemption or exchange of all of such
Limited Partner's Series E Preferred Units pursuant to Section 18.8, pursuant to
the exercise of its rights of Series F Redemption or exchange of all of such
Limited Partner's Series F Preferred Units pursuant to Section 19.8, pursuant to
the exercise of its rights of Series G Redemption or exchange of all of such
Limited Partner's Series G Preferred Units pursuant to Section 20.8, pursuant to
the exercise of its rights of Series H Redemption or exchange of all of such
Limited Partner's Series H Preferred Units pursuant to Section 21.8, or pursuant
to the exercise of its rights of Series I Redemption or exchange of all of such
Limited Partner's Series I Preferred Units pursuant to Section 22.8, shall cease
to be a Limited Partner; provided the Limited Partner owns no other Partnership
Interest.

                  C. Transfers pursuant to this Article 11 may only be made
effective on the last day of the month set forth on the written instrument of
transfer, unless the General Partner otherwise agrees.

                  D. If any Partnership Interest is transferred, assigned or
redeemed during any quarterly segment of the Partnership's fiscal year in
compliance with the provisions of this Article 11 or transferred or redeemed
pursuant to Sections 16.5, 17.5, 18.5, 19.5, 20.5, 21.5 or 22.5, on any day
other than the first day of a Partnership Year, then Net Income, Net Losses,
each item thereof and all other items attributable to such Partnership Interest
for such fiscal year shall be divided and allocated between the transferor
Partner and the transferee Partner by taking into account their varying
interests during the fiscal year in accordance with Section 706(d) of the Code,
using the interim closing of the books method. Except as otherwise required by
Section 706(d) of the Code or as otherwise specified in this Agreement or as
otherwise determined by the General Partner (to the extent consistent with
Section 706(d) of the Code),

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<PAGE>   65

solely for purposes of making such allocations, each of such items for the
calendar month in which the transfer, assignment or redemption occurs shall be
allocated among all the Partners and Assignees in a manner determined by the
General Partner in its sole discretion.

                  E. In addition to any other restrictions on transfer herein
contained, including without limitation the provisions of this Article 11 and
Section 2.6, in no event may any transfer or assignment of a Partnership
Interest by any Partner (including by way of a Series C Redemption or exchange
for Series C Preferred Shares, a Series D Redemption or exchange for Series D
Preferred Shares, a Series E Redemption or exchange for Series E Preferred
Shares, a Series F Redemption or exchange for Series F Preferred Shares, a
Series G Redemption or exchange for Series G Preferred Shares, a Series H
Redemption or exchange for Series H Preferred Shares, a Series I Redemption or
exchange for Series I Preferred Shares or any other acquisition of Common Units,
Series C Preferred Units, Series D Preferred Units, Series E Preferred Units,
Series F Preferred Units, Series G Preferred Units, Series H Preferred Units or
Series I Preferred Units by the Partnership, AMB or the General Partner) be made
(i) to any person or entity who lacks the legal right, power or capacity to own
a Partnership Interest; (ii) in violation of applicable law; (iii) except with
the consent of the General Partner, which may be given or withheld in its sole
and absolute discretion, of any component portion of a Partnership Interest,
such as the Capital Account, or rights to distributions, separate and apart from
all other components of a Partnership Interest; (iv) except with the consent of
the General Partner, which may be given or withheld in its sole and absolute
discretion, if in the opinion of legal counsel to the Partnership such transfer
would cause a termination of the Partnership for Federal or state income tax
purposes; (v) if in the opinion of counsel to the Partnership such transfer
would cause the Partnership to cease to be classified as a partnership for
Federal or state income tax purposes; (vi) if such transfer would cause the
Partnership to become, with respect to any employee benefit plan subject to
Title I of ERISA, a "party-in-interest" (as defined in Section 3(14) of ERISA)
or a "disqualified person" (as defined in Section 4975(c) of the Code); (vii) if
such transfer would, in the opinion of counsel to the Partnership, cause any
portion of the assets of the Partnership to constitute assets of any employee
benefit plan pursuant to Department of Labor Regulations Section 2510.2-101;
(viii) if such transfer requires the registration of such Partnership Interest
or requires the registration of the exchange of such Partnership Interests for
any capital stock pursuant to any applicable Federal or state securities laws;
(ix) except with the consent of the General Partner, which may be given or
withheld in its sole and absolute discretion, if such transfer is effectuated
through an "established securities market" or a "secondary market" (or the
substantial equivalent thereof) within the meaning of Section 7704 of the Code
or such transfer causes the Partnership to become a "Publicly Traded
Partnership," as such term is defined in Sections 469(k)(2) or 7704(b) of the
Code; (x) if such transfer subjects the Partnership to be regulated under the
Investment Company Act of 1940, the Investment Advisors Act of 1940 or the
Employee Retirement Income Security Act of 1974, each as amended; (xi) if the
transferee or assignee of such Partnership Interest is unable to make the
representations set forth in Section 3.4.D or such transfer could otherwise
adversely affect the ability of AMB, in its capacity as the sole stockholder of
General Partner and the sole general partner of the Operating Partnership, to
remain qualified as a REIT; or (xii) if, except with the consent of the General
Partner, which may be given or withheld in its sole and absolute discretion,
such transfer would subject AMB to any additional taxes under Section 857 or
Section 4981 of the Code.

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<PAGE>   66

                  F. The General Partner shall monitor the transfers of
interests in the Partnership (including any acquisition of Series C Preferred
Units, Series D Preferred Units, Series E Preferred Units, Series F Preferred
Units, Series G Preferred Units, Series H Preferred Units or Series I Preferred
Units by the Partnership, AMB or the General Partner) to determine (i) if such
interests are being traded on an "established securities market" or a "secondary
market (or the substantial equivalent thereof)" within the meaning of Section
7704 of the Code and (ii) whether such transfers of interests would result in
the Partnership being unable to qualify for at least one of the "safe harbors"
set forth in Regulations Section 1.7704-1 (or such other applicable guidance
subsequently published by the IRS setting forth safe harbors under which
interests will not be treated as "readily tradable on a secondary market (or the
substantial equivalent thereof)" within the meaning of Section 7704 of the Code)
(the "Safe Harbors"). The General Partner shall have authority (but shall not be
required to) to take any steps it determines are necessary or appropriate in its
sole and absolute discretion to prevent any trading of interests which could
cause the Partnership to become a "publicly traded partnership," or any
recognition by the Partnership of such transfers, or to insure that at least one
of the Safe Harbors is met.

                                   ARTICLE 12.
                              ADMISSION OF PARTNERS

                  Section 12.1. Admission of Successor General Partner

                  A successor to all of the General Partner's General Partner
Interest pursuant to Section 11.2 who is proposed to be admitted as a successor
General Partner shall be admitted to the Partnership as the General Partner,
effective upon such transfer. Any such transferee shall carry on the business of
the Partnership without dissolution. In each case, the admission shall be
subject to the successor General Partner executing and delivering to the
Partnership an acceptance of all of the terms and conditions of this Agreement
and such other documents or instruments as may be required to effect the
admission. In the case of such admission on any day other than the first day of
a Partnership Year, all items attributable to the General Partner Interest for
such Partnership Year shall be allocated between the transferring General
Partner and such successor as provided in Article 11.

                  Section 12.2. Admission of Additional Limited Partners

                  A. A Person who makes a Capital Contribution to the
Partnership in accordance with this Agreement shall be admitted to the
Partnership as an Additional Limited Partner only upon furnishing to the General
Partner (i) evidence of acceptance in form satisfactory to the General Partner
of all of the terms and conditions of this Agreement, including, without
limitation, the power of attorney granted in Section 2.4 and (ii) such other
documents or instruments as may be required in the discretion of the General
Partner in order to effect such Person's admission as an Additional Limited
Partner.

                  B. Notwithstanding anything to the contrary in this Section
12.2, no Person shall be admitted as an Additional Limited Partner without the
consent of the General Partner, which consent may be given or withheld in the
General Partner's sole and absolute discretion. The admission of any Person as
an Additional Limited Partner shall become effective on the date upon which the
name of such Person is recorded on the books and records of the Partnership,

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<PAGE>   67

following the receipt of the Capital Contribution in respect of such Limited
Partner, the documents set forth in this Section 12.2.A and the consent of the
General Partner to such admission. If any Additional Limited Partner is admitted
to the Partnership on any day other than the first day of a Partnership Year,
then Net Income, Net Losses, each item thereof and all other items allocable
among Partners and Assignees for such Partnership Year shall be allocated among
such Limited Partner and all other Partners and Assignees by taking into account
their varying interests during the Partnership Year in accordance with Section
706(d) of the Code, using the interim closing of the books method. Solely for
purposes of making such allocations, each of such items for the calendar month
in which an admission of an Additional Limited Partner occurs shall be allocated
among all the Partners and Assignees, including such Additional Limited Partner,
in a manner determined by the General Partner in its sole discretion.

                  Section 12.3. Amendment of Agreement and Certificate of
Limited Partnership

                  For the admission to the Partnership of any Partner, the
General Partner shall take all steps necessary and appropriate under the Act to
amend the records of the Partnership and, if necessary, to prepare as soon as
practical an amendment of this Agreement (including an amendment of Exhibit A)
and, if required by law, shall prepare and file an amendment to the Certificate
and may for this purpose exercise the power of attorney granted pursuant to
Section 2.4.

                                   ARTICLE 13.
                           DISSOLUTION AND LIQUIDATION

                  Section 13.1. Dissolution

                  The Partnership shall not be dissolved by the admission of
Substituted Limited Partners or Additional Limited Partners or by the admission
of a successor General Partner in accordance with the terms of this Agreement.
Upon the withdrawal of the General Partner, any successor General Partner
(selected as described in Section 13.1.B below) shall continue the business of
the Partnership. The Partnership shall dissolve, and its affairs shall be wound
up, upon the first to occur of any of the following ("Liquidating Events"):

                  A. the expiration of its term as provided in Section 2.5;

                  B. an event of withdrawal of the General Partner, as defined
in the Act, unless, within ninety (90) days after the withdrawal, all of the
remaining Common Limited Partners agree in writing, in their sole and absolute
discretion, to continue the business of the Partnership and to the appointment,
effective as of the date of withdrawal, of a substitute General Partner;

                  C. prior to October 15, 2096, an election to dissolve the
Partnership made by the General Partner with the consent of Limited Partners who
hold ninety percent (90%) of the outstanding Units held by Limited Partners;

                  D. subject to the provisions of Section 7.3.C, an election to
dissolve the Partnership made by the General Partner in its sole and absolute
discretion;

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<PAGE>   68

                  E. entry of a decree of judicial dissolution of the
Partnership pursuant to the provisions of the Act;

                  F. the sale or disposition of all or substantially all of the
assets and properties of the Partnership;

                  G. a final and non-appealable judgment is entered by a court
of competent jurisdiction ruling that the General Partner is bankrupt or
insolvent, or a final and non-appealable order for relief is entered by a court
with appropriate jurisdiction against the General Partner, in each case under
any Federal or state bankruptcy or insolvency laws as now or hereafter in
effect, unless prior to or at the time of the entry of such order or judgment a
Majority in Interest of the Limited Partners remaining consent in writing to
continue the business of the Partnership and to the appointment, effective as of
a date prior to the date of such order or judgment, of a substitute General
Partner.

                  Section 13.2. Winding Up

                  A. Upon the occurrence of a Liquidating Event, the Partnership
shall continue solely for the purposes of winding up its affairs in an orderly
manner, liquidating its assets, and satisfying the claims of its creditors and
Partners. No Partner shall take any action that is inconsistent with, or not
necessary to or appropriate for, the winding up of the Partnership's business
and affairs. The General Partner (or, in the event there is no remaining General
Partner, any Person elected by a Majority in Interest of the Limited Partners
(the "Liquidator")) shall be responsible for overseeing the winding up and
dissolution of the Partnership and shall take full account of the Partnership's
liabilities and assets and the Partnership property shall be liquidated as
promptly as is consistent with obtaining the fair value thereof, and the
proceeds therefrom (which may, to the extent determined by the General Partner,
include shares of stock of the General Partner) shall be applied and distributed
in the following order:

                  (i)      First, to the payment and discharge of all of the
                           Partnership's debts and liabilities to creditors
                           other than the Partners;

                  (ii)     Second, to the payment and discharge of all of the
                           Partnership's debts and liabilities to the General
                           Partner;

                  (iii)    Third, to the payment and discharge of all of the
                           Partnership's debts and liabilities to the other
                           Partners; and

                  (iv)     The balance, if any, to the Partners in accordance
                           with their Capital Account balances determined after
                           giving effect to all contributions and distributions
                           for all periods, and after taking into account all
                           Capital Account adjustments for the Partnership
                           taxable year during which the liquidation occurs
                           (other than those made as a result of the liquidating
                           distribution set forth in this Section 13.2.A(iv)).

The General Partner shall not receive any additional compensation for any
services performed pursuant to this Article 13 other than reimbursement of its
expenses as provided in Section 7.4.

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<PAGE>   69

                  B. Notwithstanding the provisions of Section 13.2.A which
require liquidation of the assets of the Partnership, but subject to the order
of priorities set forth therein, if prior to or upon dissolution of the
Partnership the Liquidator determines that an immediate sale of part or all of
the Partnership's assets would be impractical or would cause undue loss to the
Partners, the Liquidator may, in its sole and absolute discretion, defer for a
reasonable time the liquidation of any assets except those necessary to satisfy
liabilities of the Partnership (including to those Partners as creditors) and/or
distribute to the Partners, in lieu of cash, as tenants in common and in
accordance with the provisions of Section 13.2.A, undivided interests in such
Partnership assets as the Liquidator deems not suitable for liquidation. Any
such distributions in kind shall be made only if, in the good faith judgment of
the Liquidator, such distributions in kind are in the best interest of the
Partners, and shall be subject to such conditions relating to the disposition
and management of such properties as the Liquidator deems reasonable and
equitable and to any agreements governing the operation of such properties at
such time. The Liquidator shall determine the fair market value of any property
distributed in kind using such reasonable method of valuation as it may adopt.

                  C. The Partnership shall be terminated when any notes received
in connection with any such sale or disposition referenced in Section 13.1.E
above, or in connection with the liquidation of the Partnership have been paid
and all of the cash or property available for application and distribution under
this Agreement have been applied and distributed in accordance with this
Agreement.

                  Section 13.3. Compliance with Timing Requirements of
Regulations

                  In the event the Partnership is "liquidated" within the
meaning of Regulations Section 1.704-1(b)(2)(ii)(g), distributions shall be made
pursuant to this Article 13 to the General Partner and Limited Partners who have
positive Capital Accounts in compliance with Regulations Section
1.704-1(b)(2)(ii)(b)(2). If any Partner has a deficit balance in his or her
Capital Account (after giving effect to all contributions, distributions and
allocations for the taxable years, including the year during which such
liquidation occurs), such Partner shall have no obligation to make any
contribution to the capital of the Partnership with respect to such deficit, and
such deficit shall not be considered a debt owed to the Partnership or to any
other Person for any purpose whatsoever, except to the extent otherwise agreed
to by such Partner and the General Partner. In the discretion of the Liquidator
or the General Partner, a pro rata portion of the distributions that would
otherwise be made to the General Partner and Limited Partners pursuant to this
Article 13 may be:

                  A. distributed to a trust established for the benefit of the
General Partner and Limited Partners for the purposes of liquidating Partnership
assets, collecting amounts owed to the Partnership, and paying any contingent or
unforeseen liabilities or obligations of the Partnership or of the General
Partner arising out of or in connection with the Partnership. The assets of any
such trust shall be distributed to the General Partner and Limited Partners from
time to time, in the reasonable discretion of the Liquidator or the General
Partner, in the same proportions and the amount distributed to such trust by the
Partnership would otherwise have been distributed to the General Partner and
Limited Partners pursuant to this Agreement; or

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<PAGE>   70

                  B. withheld to establish any reserves deemed necessary or
appropriate for any contingent or unforeseen liabilities or obligations of the
Partnership; and to reflect the unrealized portion of any installment
obligations owed to the Partnership; provided that, such withheld amounts shall
be distributed to the General Partner and Limited Partners as soon as
practicable.

                  Section 13.4. Deemed Distribution and Recontribution

                  Notwithstanding any other provision of this Article 13, in the
event the Partnership is liquidated within the meaning of Regulations Section
1.704-1(b)(2)(ii)(g) but no Liquidating Event has occurred, the Partnership's
property shall not be liquidated, the Partnership's liabilities shall not be
paid or discharged, and the Partnership's affairs shall not be wound up.
Instead, the Partnership shall be deemed to have distributed the Partnership
property in kind to the General Partner and Limited Partners, who shall be
deemed to have assumed and taken such property subject to all Partnership
liabilities, all in accordance with their respective Capital Accounts.
Immediately thereafter, the General Partner and Limited Partners shall be deemed
to have recontributed the Partnership property in kind to the Partnership, which
shall be deemed to have assumed and taken such property subject to all such
liabilities.

                  Section 13.5. Rights of Limited Partners

                  Except as otherwise provided in this Agreement, each Limited
Partner shall look solely to the assets of the Partnership for the return of his
Capital Contribution and shall have no right or power to demand or receive
property from the General Partner. Except as expressly set forth herein with
respect to the rights, priorities and preferences of the Preferred Limited
Partners holding any series of Preferred Units, no Limited Partner shall have
priority over any other Limited Partner as to the return of his Capital
Contributions, distributions or allocations.

                  Section 13.6. Notice of Dissolution

                  In the event a Liquidating Event occurs or an event occurs
that would, but for provisions of Section 13.1, result in a dissolution of the
Partnership, the General Partner shall, within thirty (30) days thereafter,
provide written notice thereof to each of the Partners and to all other parties
with whom the Partnership regularly conducts business (as determined in the
discretion of the General Partner) and shall publish notice thereof in a
newspaper of general circulation in each place in which the Partnership
regularly conducts business (as determined in the discretion of the General
Partner).

                  Section 13.7. Cancellation of Certificate of Limited
Partnership

                  Upon the completion of the liquidation of the Partnership cash
and property as provided in Section 13.2, the Partnership shall be terminated
and the Certificate and all qualifications of the Partnership as a foreign
limited partnership in jurisdictions other than the State of Delaware shall be
canceled and such other actions as may be necessary to terminate the Partnership
shall be taken.

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                  Section 13.8.     Reasonable Time for Winding-Up

                  A reasonable time shall be allowed for the orderly winding-up
of the business and affairs of the Partnership and the liquidation of its assets
pursuant to Section 13.2, in order to minimize any losses otherwise attendant
upon such winding-up, and the provisions of this Agreement shall remain in
effect between the Partners during the period of liquidation.

                  Section 13.9. Waiver of Partition

                  Each Partner hereby waives any right to partition of the
Partnership property.

                                   ARTICLE 14.
                  AMENDMENT OF PARTNERSHIP AGREEMENT; CONSENTS

                  Section 14.1. Amendments

                  A. The actions requiring consent or approval of the Partners
or of the Limited Partners pursuant to this Agreement, including Sections 7.3,
16.6, 17.6, 18.6, 19.6, 20.6, 21.6 and 22.6, or otherwise pursuant to applicable
law, are subject to the procedures in this Article 14.

                  B. Amendments to this Agreement requiring the consent or
approval of Limited Partners may be proposed by the General Partner or by
Limited Partners holding twenty-five percent (25%) or more of the Partnership
Interests held by Limited Partners entitled to consent to or approve such
matter. Following such proposal, the General Partner shall submit any proposed
amendment to the Partners or to the Limited Partners entitled to consent to or
approve such amendment, as applicable. The General Partner shall seek the
written consent or approval of the Partners or the Limited Partners entitled to
consent to or approve the proposed amendment or shall call a meeting to vote
thereon and to transact any other business that it may deem appropriate. For
purposes of obtaining a written consent, the General Partner may require a
response within a reasonable specified time, but not less than fifteen (15)
days, and failure to respond in such time period shall constitute a consent
which is consistent with the General Partner's recommendation (if so
recommended); provided that, an action shall become effective at such time as
requisite consents are received even if prior to such specified time.

                  Section 14.2. Action by the Partners

                  A. Meetings of the Partners may be called by the General
Partner and shall be called upon the receipt by the General Partner of a written
request by Limited Partners holding twenty-five percent (25%) or more of the
Partnership Interests held by the Limited Partners that are entitled to vote on
the matters proposed to be voted on at such meeting. The call shall state the
nature of the business to be transacted. Notice of any such meeting shall be
given to all Partners not less than seven days nor more than thirty (30) days
prior to the date of such meeting. Partners may vote in person or by proxy at
such meeting. Whenever the vote of the Percentage Interests of the Partners, or
the Consent of the Partners or Consent of the Limited Partners is permitted or
required under this Agreement, such vote or Consent may be given at a meeting of
Partners or may be given in accordance with the procedure prescribed in Section
14.1.

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<PAGE>   72

                  B. Any action required or permitted to be taken at a meeting
of the Partners may be taken without a meeting if a written consent setting
forth the action so taken is signed by the Percentage Interests as is expressly
required by this Agreement for the action in question. Such consent may be in
one instrument or in several instruments, and shall have the same force and
effect as a vote of the Percentage Interests of the Partners (expressly required
by this Agreement). Such consent shall be filed with the General Partner. An
action so taken shall be deemed to have been taken at a meeting held on the
effective date so certified.

                  C. Each Limited Partner may authorize any Person or Persons to
act for him by proxy on all matters in which a Limited Partner is entitled to
participate, including waiving notice of any meeting, or voting or participating
at a meeting. Every proxy must be signed by the Limited Partner or his
attorney-in-fact. No proxy shall be valid after the expiration of eleven (11)
months from the date thereof unless otherwise provided in the proxy. Every proxy
shall be revocable at the pleasure of the Limited Partner executing it.

                  D. Each meeting of Partners shall be conducted by the General
Partner or such other Person as the General Partner may appoint pursuant to such
rules for the conduct of the meeting as the General Partner or such other Person
deems appropriate.

                  E. Except as otherwise expressly provided, on matters on which
Limited Partners are entitled to vote, each Limited Partner shall have a vote
equal to the number of Partnership Units held.

                                   ARTICLE 15.
                               GENERAL PROVISIONS

                  Section 15.1. Addresses and Notice

                  Any notice, demand, request or report required or permitted to
be given or made to a Partner or Assignee under this Agreement shall be in
writing and shall be deemed given or made when delivered in person or when sent
by certified first class United States mail, nationally recognized overnight
delivery service or facsimile transmission to the Partner or Assignee at the
address set forth in Exhibit A or such other address as the Partners shall
notify the General Partner in writing.

                  Section 15.2. Titles and Captions

                  All article or section titles or captions in this Agreement
are for convenience only. They shall not be deemed part of this Agreement and in
no way define, limit, extend or describe the scope or intent of any provisions
hereof. Except as specifically provided otherwise, references to "Articles" and
"Sections" are to Articles and Sections of this Agreement.

                  Section 15.3. Pronouns and Plurals

                  Whenever the context may require, any pronoun used in this
Agreement shall include the corresponding masculine, feminine or neuter forms,
and the singular form of nouns, pronouns and verbs shall include the plural and
vice versa.

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<PAGE>   73

                  Section 15.4. Further Action

                  The parties shall execute and deliver all documents, provide
all information and take or refrain from taking action as may be necessary or
appropriate to achieve the purposes of this Agreement.

                  Section 15.5. Binding Effect

                  This Agreement shall be binding upon and inure to the benefit
of the parties hereto and their heirs, executors, administrators, successors,
legal representatives and permitted assigns.

                  Section 15.6. Creditors

                  Other than as expressly set forth herein with respect to
Indemnitees, none of the provisions of this Agreement shall be for the benefit
of, or shall be enforceable by, any creditor of the Partnership.

                  Section 15.7. Waiver

                  No failure or delay by any party to insist upon the strict
performance of any covenant, duty, agreement or condition of this Agreement or
to exercise any right or remedy consequent upon any breach thereof shall
constitute waiver of any such breach or any other covenant, duty, agreement or
condition.

                  Section 15.8. Counterparts

                  This Agreement may be executed in counterparts, all of which
together shall constitute one agreement binding on all the parties hereto,
notwithstanding that all such parties are not signatories to the original or the
same counterpart. Each party shall become bound by this Agreement immediately
upon affixing its signature hereto.

                  Section 15.9. Applicable Law

                  This Agreement shall be construed in accordance with and
governed by the laws of the State of Delaware, without regard to the principles
of conflicts of law.

                  Section 15.10. Invalidity of Provisions

                  If any provision of this Agreement is or becomes invalid,
illegal or unenforceable in any respect, the validity, legality and
enforceability of the remaining provisions contained herein shall not be
affected thereby.

                  Section 15.11. Entire Agreement

                  This Agreement (together with the agreements listed on Exhibit
H hereto as to rights and obligations in respect of the Units held by the
Limited Partners who are parties thereto, or their permitted transferees)
contains the entire understanding and agreement among the

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<PAGE>   74

Partners with respect to the subject matter hereof and supersedes any other
prior written or oral understandings or agreements among them with respect
thereto.

                  Section 15.12. No Rights as Stockholders

                  Nothing contained in this Agreement shall be construed as
conferring upon the holders of Partnership Units any rights whatsoever as
stockholders of the General Partner, including without limitation any right to
receive dividends or other distributions made to stockholders of the General
Partner or to vote or to consent or to receive notice as stockholders in respect
of any meeting of stockholders for the election of directors of the General
Partner or any other matter.

                                  ARTICLE 16.

                            SERIES C PREFERRED UNITS

                  Section 16.1. Designation and Number

                  A series of Partnership Units in the Partnership designated as
the 8 3/4% Series C Cumulative Redeemable Preferred Units (the "Series C
Preferred Units") is hereby established. The number of Series C Preferred Units
shall be 2,200,000.

                  Section 16.2. Ranking

                  The Series C Preferred Units shall, with respect to
distribution rights and rights upon voluntary or involuntary liquidation,
winding up or dissolution of the Partnership, rank (i) senior to the Common
Units and to all Partnership Units the terms of which provide that such
Partnership Units shall rank junior to the Series C Preferred Units; (ii) on a
parity with all other Parity Preferred Units; and (iii) junior to all
Partnership Units which rank senior to the Series C Preferred Units.

                  Section 16.3. Distributions

                  A. Payment of Distributions. Subject to the rights of holders
of Parity Preferred Units as to the payment of distributions (including pursuant
to Section 5.1, 17.3A, 18.3A, 19.3A, 20.3A, 21.3A and 22.3A hereof), holders of
Series C Preferred Units will be entitled to receive, when, as and if declared
by the Partnership acting through the General Partner, out of Available Cash,
cumulative preferential cash distributions in an amount equal to the Series C
Priority Return. Such distributions will be payable (A) quarterly (such
quarterly periods for purposes of payment and accrual will be the quarterly
periods ending on the dates specified in this sentence and not calendar year
quarters) in arrears, on the 15th day of January, April, July and October of
each year and (B) in the event of (i) an exchange of Series C Preferred Units
into Series C Preferred Shares, or (ii) a redemption of Series C Preferred
Units, on the exchange date or redemption date, as applicable (each a "Series C
Preferred Unit Distribution Payment Date"), commencing on the first of such
payment dates to occur following their original date of issuance. If any date on
which distributions are to be made on the Series C Preferred Units is not a
Business Day, then payment of the distribution to be made on such date will be
made on the next succeeding day that is a Business Day (and without any interest
or other

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<PAGE>   75

payment in respect of any such delay) except that, if such Business Day is in
the next succeeding calendar year, such payment shall be made on the immediately
preceding Business Day, in each case with the same force and effect as if made
on such date. Distributions on the Series C Preferred Units will be made to the
holders of record of the Series C Preferred Units on the relevant record dates,
which will be fifteen (15) days prior to the relevant Series C Preferred Unit
Distribution Payment Date (the "Series C Preferred Unit Partnership Record
Date"). For purposes of clarifying the relative distribution priority rights
among the Series I Preferred Units, Series H Preferred Units, the Series G
Preferred Units, the Series F Preferred Units, the Series E Preferred Units, the
Series D Preferred Units and the Series C Preferred Units, the payment of
distributions with respect to a series of such Preferred Units prior to the
payment of distributions with respect to another such series of Preferred Units,
solely as a result of the distribution payment dates with respect to a series of
Preferred Units occurring on a different date from another series of Preferred
Units, shall not be deemed to create a priority in favor of one series of
Preferred Units over any other series of Preferred Units.

                  B. Distributions Cumulative. Notwithstanding the foregoing,
distributions on the Series C Preferred Units will accrue whether or not the
terms and provisions of any agreement of the Partnership at any time prohibit
the current payment of distributions, whether or not the Partnership has
earnings, whether or not there are funds legally available for the payment of
such of such distributions and whether or not such distributions are authorized.
Accrued but unpaid distributions on the Series C Preferred Units will accumulate
as of the Preferred Unit Distribution Payment Date on which they first become
payable.

                  C. Priority as to Distributions. (i) So long as any Series C
Preferred Units are outstanding, no distribution of cash or other property shall
be authorized, declared, paid or set apart for payment on or with respect to any
class or series of Partnership Interest represented by Junior Units, nor shall
any Junior Units or Parity Preferred Units be redeemed, purchased or otherwise
acquired for any consideration (or any monies be paid to or made available for a
sinking fund for the redemption of any such Junior Units or Parity Preferred
Units) by the Partnership (except by conversion into or exchange for other
Junior Units or Parity Preferred Units, as the case may be) unless, in each
case, full cumulative distributions have been or contemporaneously are
authorized and paid or authorized and a sum sufficient for the payment thereof
set apart for such payment on the Series C Preferred Units and all classes and
series of outstanding Parity Preferred Units for all distribution periods. The
foregoing sentence will not prohibit (a) distributions payable solely in Junior
Units, (b) the exchange of Junior Units or Parity Preferred Units into
Partnership Interests of the Partnership ranking junior to the Series C
Preferred Units as to distributions and upon voluntary and involuntary
liquidation, dissolution or winding up of the Partnership, or (c) distributions
necessary to enable the Operating Partnership to redeem partnership interests
corresponding to Series C Preferred Shares and any Parity Preferred Stock with
respect to distributions or Junior Stock to be purchased by AMB pursuant to the
REIT Charter to preserve AMB's status as a REIT, provided that such redemption
shall be upon the same terms as the corresponding stock purchase pursuant to the
REIT Charter.

                  (ii) So long as distributions have not been paid in full (or a
sum sufficient for such full payment is not so set apart) upon the Series C
Preferred Units and any other Parity Preferred Units, all distributions
authorized and declared on the Series C Preferred Units and all

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<PAGE>   76

classes or series of outstanding Parity Preferred Units shall be authorized and
declared pro rata so that the amount of distributions authorized and declared
per Series C Preferred Unit and such other classes or series of Parity Preferred
Units shall in all cases bear to each other the same ratio that accrued
distributions per Series C Preferred Unit and such other classes or series of
Parity Preferred Units (which shall not include any accumulation in respect of
unpaid distributions for prior distribution periods if such class or series of
Parity Preferred Units do not have cumulative distribution rights) bear to each
other. No interest, or sum of money in lieu of interest, shall be payable in
respect of any distributions or payments on Series C Preferred Units which may
be in arrears.

                  (iii) Notwithstanding anything to the contrary set forth
herein, distributions on Partnership Interests held by either (a) the General
Partner, (b) the Operating Partnership or (c) any other holder of Partnership
Interests in the Partnership, in each case ranking junior to or on parity with
the Series C Preferred Units may be made, without preserving the priority of
distributions described in Sections 16.3.C(i) and (ii), but only to the extent
such distributions are required to preserve the REIT status of AMB, in its
capacity as sole general partner of the Operating Partnership and as sole
stockholder of the General Partner, and in the case of any holder other than the
General Partner only to the extent required by the Partnership Agreement;
provided, that the Partnership shall not be disproportionately burdened by this
provision relative to the cash flow generated by other assets owned directly or
indirectly by AMB.

                  D. No Further Rights. Holders of Series C Preferred Units
shall not be entitled to any distributions, whether payable in cash, other
property or otherwise, in excess of the full cumulative distributions described
herein.

                  Section 16.4. Liquidation Proceeds

                  A. Distributions. Upon voluntary or involuntary liquidation,
dissolution or winding-up of the Partnership, distributions on the Series C
Preferred Units shall be made in accordance with Article 13 of this Agreement.

                  B. Notice. Written notice of any such voluntary or involuntary
liquidation, dissolution or winding-up of the Partnership, stating the payment
date or dates when, and the place or places where, the amounts distributable in
such circumstances shall be payable, shall be given by the General Partner
pursuant to Section 13.6 hereof.

                  C. No Further Rights. After payment of the full amount of the
liquidating distributions to which they are entitled, Holders of Series C
Preferred Units will have no right or claim to any of the remaining assets of
the Partnership.

                  D. Consolidation, Merger or Certain Other Transactions. None
of a consolidation or merger of the Partnership with or into another entity, a
merger of another entity with or into the Partnership, or a sale, lease,
transfer or conveyance of all or substantially all of the Partnership's property
or business shall be considered a liquidation, dissolution or winding up of the
Partnership.

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<PAGE>   77

                  Section 16.5. Series C Redemption

                  A. Series C Redemption. The Series C Preferred Units may not
be redeemed prior to November 24, 2003. On or after such date, the Partnership
shall have the right to redeem the Series C Preferred Units, in whole or in
part, at any time or from time to time, upon not less than 30 nor more than 60
days' written notice, at a redemption price, payable in cash (a "Series C
Redemption"), equal to the Capital Account balance of the holder of Series C
Preferred Units (the "Series C Redemption Price"); provided, however, that no
redemption pursuant to this Section 16.5 will be permitted if the Series C
Redemption Price does not equal or exceed the original Capital Contribution of
such holder plus the cumulative Series C Priority Return to the redemption date
to the extent not previously distributed. If fewer than all of the outstanding
Series C Preferred Units are to be redeemed, the Series C Preferred Units to be
redeemed shall be selected pro rata (as nearly as practicable without creating
fractional units).

                  B. Limitation on Redemption. (i) The Series C Redemption Price
of the Series C Preferred Units (other than the portion thereof consisting of
accumulated but unpaid distributions) is payable solely out of the sale proceeds
of capital stock of AMB which will be contributed by AMB to the Operating
Partnership and the General Partner, and which in turn will be contributed by
the Operating Partnership and the General Partner to the Partnership as an
additional capital contribution, or out of the sale of limited partner interests
in the Partnership or the Operating Partnership and from no other source. For
purposes of the preceding sentence, "capital stock" means any equity securities
(including Common Stock and Preferred Stock (as such terms are defined in the
REIT Charter)), depository shares, interests, participation or other ownership
interests (however designated) and any rights (other than debt securities
convertible into or exchangeable for equity securities) or options to purchase
any of the foregoing.

                  (ii) The Partnership may not redeem fewer than all of the
outstanding Series C Preferred Units unless all accumulated and unpaid
distributions have been paid on all Series C Preferred Units for all quarterly
distribution periods terminating on or prior to the date of redemption.

                  C. Procedures for Redemption. (i) Notice of redemption will be
(i) faxed, and (ii) mailed by the Partnership, by certified mail, postage
prepaid, not less than 30 nor more than 60 days prior to the redemption date,
addressed to the respective holders of record of the Series C Preferred Units at
their respective addresses as they appear on the records of the Partnership. No
failure to give or defect in such notice shall affect the validity of the
proceedings for the redemption of any Series C Preferred Units except as to the
holder to whom such notice was defective or not given. In addition to any
information required by law, each such notice shall state: (a) the redemption
date, (b) the Series C Redemption Price, (c) the aggregate number of Series C
Preferred Units to be redeemed and if fewer than all of the outstanding Series C
Preferred Units are to be redeemed, the number of Series C Preferred Units to be
redeemed held by such holder, which number shall equal such holder's pro rata
share (based on the percentage of the aggregate number of outstanding Series C
Preferred Units that the total number of Series C Preferred Units held by such
holder represents) of the aggregate number of Series C Preferred Units to be
redeemed, (d) the place or places where such Series C Preferred Units are to be
surrendered for payment of the Series C Redemption Price, (e) that distributions
on the Series C

                                       72
<PAGE>   78

Preferred Units to be redeemed will cease to accumulate on such redemption date
and (f) that payment of the Series C Redemption Price will be made upon
presentation and surrender of such Series C Preferred Units.

                  (ii) If the Partnership gives a notice of redemption in
respect of Series C Preferred Units (which notice will be irrevocable) then, by
12:00 noon, New York City time, on the redemption date, the Partnership will
deposit irrevocably in trust for the benefit of the Series C Preferred Units
being redeemed funds sufficient to pay the applicable Series C Redemption Price
and will give irrevocable instructions and authority to pay such Series C
Redemption Price to the holders of the Series C Preferred Units upon surrender
of the Series C Preferred Units by such holders at the place designated in the
notice of redemption. On and after the date of redemption, distributions will
cease to accumulate on the Series C Preferred Units or portions thereof called
for redemption, unless the Partnership defaults in the payment thereof. If any
date fixed for redemption of Series C Preferred Units is not a Business Day,
then payment of the Series C Redemption Price payable on such date will be made
on the next succeeding day that is a Business Day (and without any interest or
other payment in respect of any such delay) except that, if such Business Day
falls in the next calendar year, such payment will be made on the immediately
preceding Business Day, in each case with the same force and effect as if made
on such date fixed for redemption. If payment of the Series C Redemption Price
is improperly withheld or refused and not paid by the Partnership, distributions
on such Series C Preferred Units will continue to accumulate from the original
redemption date to the date of payment, in which case the actual payment date
will be considered the date fixed for redemption for purposes of calculating the
applicable Series C Redemption Price.

                  Section 16.6. Voting Rights

                  A. General. Holders of the Series C Preferred Units will not
have any voting rights or right to consent to any matter requiring the consent
or approval of the Limited Partners, except as set forth below and in Section
7.3.E.

                  B. Certain Voting Rights. So long as any Series C Preferred
Units remains outstanding, the Partnership shall not, without the affirmative
vote of the holders of at least two-thirds of the Series C Preferred Units
outstanding at the time (i) authorize or create, or increase the authorized or
issued amount of, any class or series of Partnership Interests ranking prior to
the Series C Preferred Units with respect to payment of distributions or rights
upon liquidation, dissolution or winding-up or reclassify any Partnership
Interests of the Partnership into any such Partnership Interest, or create,
authorize or issue any obligations or security convertible into or evidencing
the right to purchase any such Partnership Interests, (ii) authorize or create,
or increase the authorized or issued amount of any Parity Preferred Units or
reclassify any Partnership Interest of the Partnership into any such Partnership
Interest or create, authorize or issue any obligations or security convertible
into or evidencing the right to purchase any such Partnership Interests but only
to the extent such Parity Preferred Units are issued to an affiliate of the
Partnership, other than AMB or the Operating Partnership to the extent the
issuance of such interests was to allow AMB or the Operating Partnership to
issue corresponding preferred stock or preferred interests to persons who are
not affiliates of the Partnership (other than AMB to the extent AMB issues
corresponding preferred stock to persons who are not affiliates of the

                                       73
<PAGE>   79

Partnership or the Operating Partnership) or (iii) either consolidate, merge
into or with, or convey, transfer or lease its assets substantially as an
entirety to, any corporation or other entity or amend, alter or repeal the
provisions of the Partnership Agreement (including, without limitation, this
Article 16 and Section 11.2), whether by merger, consolidation or otherwise, in
each case in a manner that would materially and adversely affect the powers,
special rights, preferences, privileges or voting power of the Series C
Preferred Units or the holders thereof; provided, however, that with respect to
the occurrence of any event set forth in (iii) above, so long as (a) the
Partnership is the surviving entity and the Series C Preferred Units remain
outstanding with the terms thereof unchanged, or (b) the resulting, surviving or
transferee entity is a partnership, limited liability company or other
pass-through entity organized under the laws of any state and substitutes the
Series C Preferred Units for other interests in such entity having substantially
the same terms and rights as the Series C Preferred Units, including with
respect to distributions, voting rights and rights upon liquidation, dissolution
or winding-up, then the occurrence of any such event shall not be deemed to
materially and adversely affect such rights, privileges or voting powers of the
holders of the Series C Preferred Units; and provided further, that any increase
in the amount of Partnership Interests or the creation or issuance of any other
class or series of Partnership Interests represented by Junior Units or Parity
Preferred Units that are not issued to an affiliate of the Partnership, other
than the General Partner or the Operating Partnership to the extent the issuance
of such interests was to allow the General Partner or the Operating Partnership
to issue corresponding preferred stock or preferred interests to persons who are
not affiliates of the Partnership (other than AMB to the extent AMB issues
corresponding preferred stock or preferred interests to persons who are not
affiliates of the Partnership or the Operating Partnership), shall not be deemed
to materially and adversely affect such rights, preferences, privileges or
voting powers.

                  C. So long as any Series C Preferred Units remain outstanding,
the Operating Partnership shall not, without the affirmative vote of the holders
of at least two-thirds of the Series C Preferred Units outstanding at the time,
take any action which would result in the termination of the right of the
holders of such units to effect an exchange pursuant to Section 16.8; provided
however, no such vote shall be required so long as the Series C Preferred Units
(or any interests substituted therefore pursuant to Section 16.6.B) remain
outstanding and are exchangeable for Series C Preferred Shares or stock in
another entity having substantially the same terms and rights as the Series C
Preferred Shares.

                  Section 16.7. Transfer Restrictions

                  The Series C Preferred Units shall be subject to the
provisions of Article 11 hereof. No transfer of Series C Preferred Units, or
other action by the holder or holders of such Units, is permitted, without the
consent of the General Partner which consent may be given or withheld in its
sole and absolute discretion, if such transfer or other action would result in
more than four partners holding all outstanding Series C Preferred Units within
the meaning of Treasury Regulation Section 1.7704-1(h)(3)(i); provided, however,
that the General Partner's consent may not be unreasonably withheld if (a) such
transfer or other action would not result in more than ten partners holding all
outstanding Series C Preferred Units within the meaning of Treasury Regulation
Section 1.7704-1(h)(3)(i) and (b) the General Partner is relying on a provision
other than Treasury Regulation Section 1.7704-1(h) to avoid classification of

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<PAGE>   80

Operating Partnership as a "publicly traded partnership" within the meaning of
Code Section 7704 (a "PTP"). In addition, no transfer may be made to any person
if such transfer would cause the exchange of the Series C Preferred Units for
Series C Preferred Shares, as provided herein, to be required to be registered
under the Securities Act of 1933, as amended, or any state securities laws.

                  Section 16.8. Exchange Rights

                  A. Right to Exchange.

                  (i) Series C Preferred Units will be exchangeable in whole but
not in part unless expressly otherwise provided herein at anytime on or after
November 24, 2008, at the option of 51% of the holders of all outstanding Series
C Preferred Units, for authorized but previously unissued Series C Preferred
Shares at an exchange rate of one Series C Preferred Share from AMB for one
Series C Preferred Unit, subject to adjustment as described below (the "Series C
Exchange Price"), provided that the Series C Preferred Units will become
exchangeable at any time, in whole but not in part unless expressly otherwise
provided herein, at the option of 51% of the holders of all outstanding Series C
Preferred Units for Series C Preferred Shares if (y) at any time full
distributions shall not have been timely made on any Series C Preferred Unit
with respect to six (6) prior quarterly distribution periods, whether or not
consecutive, provided, however, that a distribution in respect of Series C
Preferred Units shall be considered timely made if made within two (2) Business
Days after the applicable Preferred Unit Distribution Payment Date if at the
time of such late payment there shall not be any prior quarterly distribution
periods in respect of which full distributions were not timely made or (z) upon
receipt by a holder or holders of Series C Preferred Units of (A) notice from
the General Partner that the General Partner or a Subsidiary of the General
Partner has taken the position that the Partnership is, or upon the consummation
of an identified event in the immediate future will be, a PTP and (B) an opinion
rendered by independent counsel familiar with such matters addressed to a holder
or holders of Series C Preferred Units, that the Partnership is or likely is, or
upon the occurrence of a defined event in the immediate future will be or likely
will be, a PTP. In addition, the Series C Preferred Units may be exchanged for
Series C Preferred Shares, in whole but not in part unless expressly otherwise
provided herein, at the option of 51% of the holders of all outstanding Series C
Preferred Units after November 24, 2001 and prior to November 24, 2008 if such
holders of a Series C Preferred Units shall deliver to the General Partner
either (i) a private letter ruling addressed to such holder of Series C
Preferred Units or (ii) an opinion of independent counsel reasonably acceptable
to the General Partner based on the enactment of temporary or final Treasury
Regulations or the publication of a Revenue Ruling, in either case to the effect
that an exchange of the Series C Preferred Units at such earlier time would not
cause the Series C Preferred Units to be considered "stock and securities"
within the meaning of Section 351(e) of the Code for purposes of determining
whether the holder of such Series C Preferred Units is an "investment company"
under Section 721(b) of the Code if an exchange is permitted at such earlier
date. Furthermore, the Series C Preferred Units, if Series C Contributors
holding 51% of all outstanding Series C Preferred Units determine, may be
exchanged in whole but not in part (regardless of whether held by Series C
Contributors) for Series C Preferred Shares (but only if the exchange in whole
may be accomplished consistently with the ownership limitations set forth under
the Series C Articles Supplementary (as defined herein), taking into

                                       75
<PAGE>   81

account exceptions thereto) if at any time, excluding the effect of the Loan (as
defined below) for purposes of the 5% test of Section 856(c)(4)(B) of the Code,
(i) the Partnership reasonably determines that the assets and income of the
Partnership for a taxable year after 1998 would not satisfy the income and
assets tests of Section 856 of the Code for such taxable year if the Partnership
were a real estate investment trust within the meaning of the Code or (ii) any
holder of Series C Preferred Units shall deliver to the Partnership and the
Company an opinion of independent counsel reasonably acceptable to the Company
to the effect that, based on the assets and income of the Partnership for a
taxable year after 1998, the Partnership would not satisfy the income and assets
tests of Section 856 of the Code for such taxable year if the Partnership were a
real estate investment trust within the meaning of the Code and that such
failure would create a meaningful risk that a holder of the Series C Preferred
Units would fail to maintain qualification as a real estate investment trust.
For purposes of this Section 16.8.A(i), the term "Loan" means the loan made on
November 24, 1998 by the Partnership to the Operating Partnership in the
aggregate principal amount of $107,102,375.00.

                  (ii) Notwithstanding anything to the contrary set forth in
Section 16.8.A(i), if a Series C Exchange Notice (as defined herein) has been
delivered to AMB and the General Partner, then the General Partner may, at its
option, within ten (10) Business Days after receipt of the Series C Exchange
Notice, elect to cause the Partnership to redeem all or a portion of the
outstanding Series C Preferred Units for cash in an amount equal to the original
Capital Contribution per Series C Preferred Unit and all accrued and unpaid
distributions thereon to the date of redemption. If the General Partner elects
to redeem fewer than all of the outstanding Series C Preferred Units, the number
of Series C Preferred Units held by each holder to be redeemed shall equal such
holder's pro rata share (based on the percentage of the aggregate number of
outstanding Series C Preferred Units that the total number of Series C Preferred
Units held by such holder represents) of the aggregate number of Series C
Preferred Units being redeemed.

                  (iii) In the event an exchange of all Series C Preferred Units
pursuant to Section 16.8.A would violate the provisions on ownership limitation
of AMB set forth in Section 7 of Article Third of the Articles Supplementary to
the REIT Charter with respect to Series C Preferred Shares (the "Series C
Articles Supplementary"), each holder of Series C Preferred Units shall be
entitled to exchange, pursuant to the provisions of Section 16.8.B, a number of
Series C Preferred Units which would comply with the provisions on the ownership
limitation of AMB set forth in such Section 7 of Article Third of the Series C
Articles Supplementary, with respect to such holder, and any Series C Preferred
Units not so exchanged (the "Series C Excess Units") shall be redeemed by the
Partnership for cash in an amount equal to the original Capital Contribution per
Excess Unit, plus any accrued and unpaid distributions thereon to the date of
redemption subject to any restriction thereon contained in any debt instrument
or agreement of the Partnership. In the event an exchange would result in Excess
Units, as a condition to such exchange, each holder of such units agrees to
provide representations and covenants reasonably requested by AMB relating to
(i) the widely held nature of the interests in such holder, sufficient to assure
AMB that the Holder's ownership of stock of AMB (without regard to the limits
described above) will not cause any individual to own in excess of 9.0% of the
stock of AMB; and (ii) to the extent such Holder can so represent and covenant
without obtaining information from its owners (other than one or more direct or
indirect parent corporations, limited liability

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<PAGE>   82

companies or partnerships and not the holders of any interests in any such
parent), the Holder's ownership of tenants of the Partnership and its
affiliates. For purposes of determining the number of Excess Units under this
Section 16.8.A(iii), the "Ownership Limit" set forth in the Series C Articles
Supplementary shall be deemed to be 9.0%. To the extent the Partnership would
not be able to pay the cash set forth above in exchange for the Excess Units,
and to the extent consistent with the REIT Charter, AMB agrees that it will
grant to the holders of the Series C Preferred Units exceptions to the Ownership
Limit set forth in the Series C Articles Supplementary sufficient to allow such
Holders to exchange all of their Series C Preferred Units for Series C Preferred
Shares, provided such holders furnish to AMB representations acceptable to AMB
in its sole and absolute discretion which assure AMB that such exceptions will
not jeopardize AMB's tax status as a REIT for purposes of federal and applicable
state law. Notwithstanding any provision of this Agreement to the contrary, no
Series C Limited Partner shall be entitled to effect an exchange of Series C
Preferred Units for Series C Preferred Shares to the extent that ownership or
right to acquire such shares would cause the Partner or any other Person or, in
the opinion of counsel selected by AMB, may cause the Partner or any other
Person, to violate the restrictions on ownership and transfer of Series C
Preferred Shares set forth in the REIT Charter. To the extent any such attempted
exchange for Series C Preferred Shares would be in violation of the previous
sentence, it shall be void ab initio and such Series C Limited Partner shall not
acquire any rights or economic interest in the Series C Preferred Shares
otherwise issuable upon such exchange.

                  (iv) The redemption of Series C Preferred Units described in
Section 16.8.A(ii) and (iii) shall be subject to the provisions of Section
16.5.B(i) and Section 16.5.C(ii); provided, however, that the term "Redemption
Price" in such Sections 16.5.B(i) and 16.5.C(ii) shall be read to mean the
original Capital Contribution per Series C Preferred Unit being redeemed as set
forth on Exhibit A plus all accrued and unpaid distributions to the redemption
date.

                  B. Procedure for Exchange and/or Redemption of Series C
Preferred Units.

                  (i) Any exchange shall be exercised pursuant to a notice of
exchange (the "Series C Exchange Notice") delivered to AMB and the General
Partner by the Partners representing at least 51% of the outstanding Series C
Preferred Units (or by Contributors in the case of an exchange pursuant to the
last sentence of Section 16.8.A.(i) hereof) by (a) fax and (b) by certified mail
postage prepaid. AMB may effect any exchange of Series C Preferred Units, or the
General Partner may exercise its option to cause the Partnership to redeem any
portion of the Series C Preferred Units for cash pursuant to Section 16.8.A(ii)
or redeem Excess Units pursuant to Section 16.8.A(iii), by delivering to each
holder of record of Series C Preferred Units, within ten (10) Business Days
following receipt of the Series C Exchange Notice, (a) if the General Partner
elects to cause the Partnership to acquire any of the Series C Preferred Units
then outstanding, (1) certificates representing the Series C Preferred Shares
being issued in exchange for the Series C Preferred Units of such holder being
exchanged and (2) a written notice (a "Series C Redemption Notice") stating (A)
the redemption date, which may be the date of such Series C Redemption Notice or
any other date which is not later than sixty (60) days following the receipt of
the Series C Exchange Notice, (B) the redemption price, (C) the place or places
where the Series C Preferred Units are to be surrendered and (D) that
distributions on the Series C Preferred Units will cease to accrue on such
redemption date, or (b) if the General Partner elects to cause

                                       77
<PAGE>   83

the Partnership to redeem all of the Series C Preferred Units then outstanding
in exchange for cash, a Series C Redemption Notice. Series C Preferred Units
which are redeemed shall be deemed canceled (and any corresponding Partnership
Interest represented thereby deemed terminated) on the redemption date. Holders
of Series C Preferred Units shall deliver any canceled certificates representing
Series C Preferred Units which have been exchanged or redeemed to the office of
General Partner (which currently is located at Pier 1, Bay 1, San Francisco,
California 94111) within ten (10) Business Days of the exchange or redemption
with respect thereto. Notwithstanding anything to the contrary contained herein,
any and all Series C Preferred Units to be exchanged for Series C Preferred
Stock pursuant to this Section 16.8 shall be so exchanged in a single
transaction at one time. As a condition to exchange, AMB may require the holders
of Series C Preferred Units to make such representations as may be reasonably
necessary for the General Partner to establish that the issuance of Series C
Preferred Shares pursuant to the exchange shall not be required to be registered
under the Securities Act or any state securities laws. Any Series C Preferred
Shares issued pursuant to this Section 16.8 shall be delivered as shares which
are duly authorized, validly issued, fully paid and nonassessable, free of any
pledge, lien, encumbrance or restriction other than those provided in the REIT
Charter, the Bylaws of AMB, the Securities Act and relevant state securities or
blue sky laws.

                  The certificates representing the Series C Preferred Shares
issued upon exchange of the Series C Preferred Units shall contain the following
legend:

                  THE SHARES REPRESENTED BY THIS CERTIFICATE MAY NOT BE
                  TRANSFERRED, SOLD, ASSIGNED, PLEDGED, HYPOTHECATED OR
                  OTHERWISE DISPOSED OF EXCEPT (A) PURSUANT TO AN EFFECTIVE
                  REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933, AS
                  AMENDED (THE "ACT"), AND STATE SECURITIES LAWS OR (B) IF THE
                  CORPORATION HAS BEEN FURNISHED WITH A SATISFACTORY OPINION OF
                  COUNSEL FOR THE HOLDER OF THE SHARES REPRESENTED HEREBY, OR
                  OTHER EVIDENCE SATISFACTORY TO THE CORPORATION, THAT SUCH
                  TRANSFER, SALE, ASSIGNMENT, PLEDGE, HYPOTHECATION OR OTHER
                  DISPOSITION IS EXEMPT FROM THE PROVISIONS OF SECTION 5 OF THE
                  ACT AND STATE SECURITIES LAWS AND THE RULES AND REGULATIONS
                  THEREUNDER.

                  (ii) In the event of an exchange of Series C Preferred Units
for Series C Preferred Shares, an amount equal to the accrued and unpaid
distributions to the date of exchange on any Series C Preferred Units tendered
for exchange shall (i) accrue on the Series C Preferred Shares into which such
Series C Preferred Units are exchanged, and (ii) continue to accrue on such
Series C Preferred Units, which shall remain outstanding following such
exchange, with the General Partner as the holder of such REIT Series C Preferred
Units. Notwithstanding anything to the contrary set forth herein, in no event
shall a Holder of a Series C Preferred Unit that was validly exchanged for
Series C Preferred Shares pursuant to this Section (other than the General

                                       78
<PAGE>   84

Partner holding such Series C Preferred Unit following any such exchange),
receive a distribution out of Available Cash of the Partnership, if such Holder,
after exchange, is entitled to receive a distribution with respect to the Series
C Preferred Shares for which such Series C Preferred Unit was exchanged or
redeemed. Further for purposes of the foregoing, in the event of an exchange of
Series C Preferred Units for Series C Preferred Shares, if the accrued and
unpaid distributions per Series C Preferred Unit is not the same for each Series
C Preferred Unit, the accrued and unpaid distributions per Series C Preferred
Unit for each such Series C Preferred Unit shall be equal to the greatest amount
of such accrued and unpaid distributions per Series C Preferred Unit on any such
unit.

                  (iii) Fractional Series C Preferred Shares are not to be
issued upon exchange but, in lieu thereof, the General Partner will pay a cash
adjustment based upon the fair market value of the Series C Preferred Shares on
the day prior to the exchange date as determined in good faith by the board of
directors of the General Partner.

                  C. Adjustment of Exchange Price. In case AMB shall be a party
to any transaction (including, without limitation, a merger, consolidation,
statutory share exchange, tender offer for all or substantially all of AMB's
capital stock or sale of all or substantially all of AMB's assets), in each case
as a result of which the Series C Preferred Shares will be converted into the
right to receive shares of capital stock, other securities or other property
(including cash or any combination thereof), each Series C Preferred Unit will
thereafter be exchangeable into the kind and amount of shares of capital stock
and other securities and property receivable (including cash or any combination
thereof) upon the consummation of such transaction by a holder of that number of
Series C Preferred Shares or fraction thereof into which one Series C Preferred
Unit was exchangeable immediately prior to such transaction. AMB may not become
a party to any such transaction unless the terms thereof are consistent with the
foregoing. AMB and the Operating Partnership further agree that, notwithstanding
any transaction to which either may be a party (including, without limitation,
any merger, consolidation, statutory share exchange, tender offer for all or
substantially all of such entity's capital stock or partnership interests or
sale of all or substantially all of such entity's assets), immediately following
any such transaction, the issuer or issuers of any shares of capital stock and
other securities into which the Series C Preferred Units shall be exchangeable
pursuant to this Section 16.8 shall be the same issuer or issuers of shares of
capital stock and other securities into which the 8N% Series B Cumulative
Redeemable Partnership Units of the Operating Partnership (the "Series B
Preferred Units") are then exchangeable (or, if the Series B Preferred Units
have previously been redeemed in full, would have been then exchangeable if then
still outstanding).

                  Section 16.9. No Conversion Rights

                  The Series C Preferred Units shall not be convertible into any
other class or series of interest in the Partnership.

                  Section 16.10. No Sinking Fund

                  No sinking fund shall be established for the retirement or
redemption of Series C Preferred Units.

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                                   ARTICLE 17.
                            SERIES D PREFERRED UNITS

                  Section 17.1. Designation and Number

                  A series of Partnership Units in the Partnership designated as
the 7.75% Series D Cumulative Redeemable Preferred Units (the "Series D
Preferred Units") is hereby established. The number of Series D Preferred Units
shall be 1,595,337.

                  Section 17.2. Ranking

                  The Series D Preferred Units shall, with respect to
distribution rights and rights upon voluntary or involuntary liquidation,
winding up or dissolution of the Partnership, rank (i) senior to the Common
Units and to all Partnership Units the terms of which provide that such
Partnership Units shall rank junior to the Series D Preferred Units; (ii) on a
parity with the Series C Preferred Units and all other Parity Preferred Units;
and (iii) junior to all Partnership Units which rank senior to the Series D
Preferred Units.

                  Section 17.3. Distributions

                  A. Payment of Distributions. Subject to the rights of holders
of Parity Preferred Units as to the payment of distributions (including pursuant
to Sections 5.1, 16.3.A, 18.3A, 19.3A, 20.3A, 21.3A and 22.3A hereof), holders
of Series D Preferred Units will be entitled to receive, when, as and if
declared by the Partnership acting through the General Partner, out of Available
Cash, cumulative preferential cash distributions in an amount equal to the
Series D Priority Return. Such distributions will be payable (A) quarterly (such
quarterly periods for purposes of payment and accrual will be the quarterly
periods ending on the dates specified in this sentence and not calendar year
quarters) in arrears, on the 25th day of March, June, September and December of
each year and (B) in the event of (i) an exchange of Series D Preferred Units
into Series D Preferred Shares, or (ii) a redemption of Series D Preferred
Units, on the exchange date or redemption date, as applicable (each a "Series D
Preferred Unit Distribution Payment Date"), commencing on the first of such
payment dates to occur following their original date of issuance. If any date on
which distributions are to be made on the Series D Preferred Units is not a
Business Day, then payment of the distribution to be made on such date will be
made on the next succeeding day that is a Business Day (and without any interest
or other payment in respect of any such delay) except that, if such Business Day
is in the next succeeding calendar year, such payment shall be made on the
immediately preceding Business Day, in each case with the same force and effect
as if made on such date. Distributions on the Series D Preferred Units will be
made to the holders of record of the Series D Preferred Units on the relevant
record dates, which will be fifteen (15) days prior to the relevant Series D
Preferred Unit Distribution Payment Date (the "Series D Preferred Unit
Partnership Record Date"). For purposes of clarifying the relative distribution
priority rights among the Series I Preferred Units, Series H Preferred Units,
the Series G Preferred Units, the Series F Preferred Units, the Series E
Preferred Units, the Series D Preferred Units and the Series C Preferred Units,
the payment of distributions with respect to a series of such Preferred Units
prior to the payment of distributions with respect to another such series of
Preferred Units, solely as a result of the distribution

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<PAGE>   86

payment dates with respect to a series of Preferred Units occurring on a
different date from another series of Preferred Units, shall not be deemed to
create a priority in favor of one series of Preferred Units over any other
series of Preferred Units.

                  B. Distributions Cumulative. Notwithstanding the foregoing,
distributions on the Series D Preferred Units will accrue whether or not the
terms and provisions of any agreement of the Partnership at any time prohibit
the current payment of distributions, whether or not the Partnership has
earnings, whether or not there are funds legally available for the payment of
such of such distributions and whether or not such distributions are authorized.
Accrued but unpaid distributions on the Series D Preferred Units will accumulate
as of the Preferred Unit Distribution Payment Date on which they first become
payable.

                  C. Priority as to Distributions. (i) So long as any Series D
Preferred Units are outstanding, no distribution of cash or other property shall
be authorized, declared, paid or set apart for payment on or with respect to any
class or series of Partnership Interest represented by Junior Units, nor shall
any Junior Units or Parity Preferred Units be redeemed, purchased or otherwise
acquired for any consideration (or any monies be paid to or made available for a
sinking fund for the redemption of any such Junior Units or Parity Preferred
Units) by the Partnership (except by conversion into or exchange for other
Junior Units or Parity Preferred Units, as the case may be) unless, in each
case, full cumulative distributions have been or contemporaneously are
authorized and paid or authorized and a sum sufficient for the payment thereof
set apart for such payment on the Series D Preferred Units and all classes and
series of outstanding Parity Preferred Units for all distribution periods. The
foregoing sentence will not prohibit (a) distributions payable solely in Junior
Units, (b) the exchange of Junior Units or Parity Preferred Units into
Partnership Interests of the Partnership ranking junior to the Series D
Preferred Units as to distributions and upon voluntary and involuntary
liquidation, dissolution or winding up of the Partnership, or (c) distributions
necessary to enable the Operating Partnership to redeem partnership interests
corresponding to Series D Preferred Shares and any Parity Preferred Stock with
respect to distributions or Junior Stock to be purchased by AMB pursuant to the
REIT Charter to preserve AMB's status as a REIT; provided that such redemption
shall be upon the same terms as the corresponding stock purchase pursuant to the
REIT Charter.

                  (ii) So long as distributions have not been paid in full (or a
sum sufficient for such full payment is not so set apart) upon the Series D
Preferred Units and any other Parity Preferred Units, all distributions
authorized and declared on the Series D Preferred Units and all classes or
series of outstanding Parity Preferred Units shall be authorized and declared
pro rata so that the amount of distributions authorized and declared per Series
D Preferred Unit and such other classes or series of Parity Preferred Units
shall in all cases bear to each other the same ratio that accrued distributions
per Series D Preferred Unit and such other classes or series of Parity Preferred
Units (which shall not include any accumulation in respect of unpaid
distributions for prior distribution periods if such class or series of Parity
Preferred Units do not have cumulative distribution rights) bear to each other.
No interest, or sum of money in lieu of interest, shall be payable in respect of
any distributions or payments on Series D Preferred Units which may be in
arrears.

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<PAGE>   87

                  (iii) Notwithstanding anything to the contrary set forth
herein, distributions on Partnership Interests held by either (a) the General
Partner, (b) the Operating Partnership or any other holder of Partnership
Interests in the Partnership, in each case ranking junior to or on parity with
the Series D Preferred Units may be made, without preserving the priority of
distributions described in Sections 17.3.C(i) and (ii), but only to the extent
such distributions are required to preserve the REIT status of AMB, in its
capacity as sole general partner of the Operating Partnership and as sole
stockholder of the General Partner, and in the case of any holder other than the
General Partner only to the extent required by the Partnership Agreement;
provided, that the Partnership shall not be disproportionately burdened by this
provision relative to the cash flow generated by other assets owned directly or
indirectly by AMB.

                  D. No Further Rights. Holders of Series D Preferred Units
shall not be entitled to any distributions, whether payable in cash, other
property or otherwise, in excess of the full cumulative distributions described
herein.

                  Section 17.4. Liquidation Proceeds

                  A. Distributions. Upon voluntary or involuntary liquidation,
dissolution or winding-up of the Partnership, distributions on the Series D
Preferred Units shall be made in accordance with Article 13 of this Agreement.

                  B. Notice. Written notice of any such voluntary or involuntary
liquidation, dissolution or winding-up of the Partnership, stating the payment
date or dates when, and the place or places where, the amounts distributable in
such circumstances shall be payable, shall be given by the General Partner
pursuant to Section 13.6 hereof.

                  C. No Further Rights. After payment of the full amount of the
liquidating distributions to which they are entitled, Holders of Series D
Preferred Units will have no right or claim to any of the remaining assets of
the Partnership.

                  D. Consolidation, Merger or Certain Other Transactions. None
of a consolidation or merger of the Partnership with or into another entity, a
merger of another entity with or into the Partnership, or a sale, lease,
transfer or conveyance of all or substantially all of the Partnership's property
or business shall be considered a liquidation, dissolution or winding up of the
Partnership.

                  Section 17.5. Series D Redemption

                  A. Series D Redemption. The Series D Preferred Units may not
be redeemed prior to May 5, 2004. On or after such date, the Partnership shall
have the right to redeem the Series D Preferred Units, in whole or in part, at
any time or from time to time, upon not less than 30 nor more than 60 days'
written notice, at a redemption price, payable in cash (a "Series D
Redemption"), equal to the Capital Account balance of the holder of Series D
Preferred Units (the "Series D Redemption Price"); provided, however, that no
redemption pursuant to this Section 17.5 will be permitted if the Series D
Redemption Price does not equal or exceed the original Capital Contribution of
such holder plus the cumulative Series D Priority Return to the redemption date
to the extent not previously distributed. If fewer than all of the outstanding

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Series D Preferred Units are to be redeemed, the Series D Preferred Units to be
redeemed shall be selected pro rata (as nearly as practicable without creating
fractional units).

                  B. Limitation on Series D Redemption. (i) The Series D
Redemption Price of the Series D Preferred Units (other than the portion thereof
consisting of accumulated but unpaid distributions) is payable solely out of the
sale proceeds of capital stock of AMB, which will be contributed by AMB to the
General Partner or the Operating Partnership and which in turn will be
contributed by the General Partner or the Operating Partnership to the
Partnership as an additional capital contribution, or out of the sale of limited
partner interests in the Partnership or the Operating Partnership and from no
other source. For purposes of the preceding sentence, "capital stock" means any
equity securities (including Common Stock and Preferred Stock (as such terms are
defined in the REIT Charter)), depository shares, interests, participation or
other ownership interests (however designated) and any rights (other than debt
securities convertible into or exchangeable for equity securities) or options to
purchase any of the foregoing.

                  (ii) The Partnership may not redeem fewer than all of the
outstanding Series D Preferred Units unless all accumulated and unpaid
distributions have been paid on all Series D Preferred Units for all quarterly
distribution periods terminating on or prior to the date of redemption.

                  C. Procedures for Series D Redemption. (i) Notice of
redemption will be (i) faxed, and (ii) mailed by the Partnership, by certified
mail, postage prepaid, not less than 30 nor more than 60 days prior to the
redemption date, addressed to the respective holders of record of the Series D
Preferred Units at their respective addresses as they appear on the records of
the Partnership. No failure to give or defect in such notice shall affect the
validity of the proceedings for the redemption of any Series D Preferred Units
except as to the holder to whom such notice was defective or not given. In
addition to any information required by law, each such notice shall state: (a)
the redemption date, (b) the Series D Redemption Price, (c) the aggregate number
of Series D Preferred Units to be redeemed and if fewer than all of the
outstanding Series D Preferred Units are to be redeemed, the number of Series D
Preferred Units to be redeemed held by such holder, which number shall equal
such holder's pro rata share (based on the percentage of the aggregate number of
outstanding Series D Preferred Units that the total number of Series D Preferred
Units held by such holder represents) of the aggregate number of Series D
Preferred Units to be redeemed, (d) the place or places where such Series D
Preferred Units are to be surrendered for payment of the Series D Redemption
Price, (e) that distributions on the Series D Preferred Units to be redeemed
will cease to accumulate on such redemption date and (f) that payment of the
Series D Redemption Price will be made upon presentation and surrender of such
Series D Preferred Units.

                  (ii) If the Partnership gives a notice of redemption in
respect of Series D Preferred Units (which notice will be irrevocable) then, by
12:00 noon, New York City time, on the redemption date, the Partnership will
deposit irrevocably in trust for the benefit of the Series D Preferred Units
being redeemed funds sufficient to pay the applicable Series D Redemption Price
and will give irrevocable instructions and authority to pay such Series D
Redemption Price to the holders of the Series D Preferred Units upon surrender
of the Series D Preferred Units by such holders at the place designated in the
notice of redemption. On and after the date of

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<PAGE>   89

redemption, distributions will cease to accumulate on the Series D Preferred
Units or portions thereof called for redemption, unless the Partnership defaults
in the payment thereof. If any date fixed for redemption of Series D Preferred
Units is not a Business Day, then payment of the Series D Redemption Price
payable on such date will be made on the next succeeding day that is a Business
Day (and without any interest or other payment in respect of any such delay)
except that, if such Business Day falls in the next calendar year, such payment
will be made on the immediately preceding Business Day, in each case with the
same force and effect as if made on such date fixed for redemption. If payment
of the Series D Redemption Price is improperly withheld or refused and not paid
by the Partnership, distributions on such Series D Preferred Units will continue
to accumulate from the original redemption date to the date of payment, in which
case the actual payment date will be considered the date fixed for redemption
for purposes of calculating the applicable Series D Redemption Price.

                  Section 17.6. Voting and Certain Management Rights

                  A. General. Holders of the Series D Preferred Units will not
have any voting rights or right to consent to any matter requiring the consent
or approval of the Limited Partners, except as set forth below and in Section
7.3.E.

                  B. Certain Voting Rights. So long as any Series D Preferred
Units remains outstanding, the Partnership shall not, without the affirmative
vote of the holders of at least two-thirds of the Series D Preferred Units
outstanding at the time (i) authorize or create, or increase the authorized or
issued amount of, any class or series of Partnership Interests ranking prior to
the Series D Preferred Units with respect to payment of distributions or rights
upon liquidation, dissolution or winding-up or reclassify any Partnership
Interests of the Partnership into any such Partnership Interest, or create,
authorize or issue any obligations or security convertible into or evidencing
the right to purchase any such Partnership Interests, (ii) authorize or create,
or increase the authorized or issued amount of any Parity Preferred Units or
reclassify any Partnership Interest of the Partnership into any such Partnership
Interest or create, authorize or issue any obligations or security convertible
into or evidencing the right to purchase any such Partnership Interests but only
to the extent such Parity Preferred Units are issued to an affiliate of the
Partnership, other than AMB or the Operating Partnership to the extent the
issuance of such interests was to allow AMB or the Operating Partnership to
issue corresponding preferred stock or preferred interests to persons who are
not affiliates of the Partnership (other than AMB to the extent AMB issues
corresponding preferred stock to persons who are not affiliates of the
Partnership or the Operating Partnership) or (iii) either consolidate, merge
into or with, or convey, transfer or lease its assets substantially as an
entirety to, any corporation or other entity or amend, alter or repeal the
provisions of the Partnership Agreement (including, without limitation, this
Article 17 and Section 11.2), whether by merger, consolidation or otherwise, in
each case in a manner that would materially and adversely affect the powers,
special rights, preferences, privileges or voting power of the Series D
Preferred Units or the holders thereof; provided, however, that with respect to
the occurrence of any event set forth in (iii) above, so long as (a) the
Partnership is the surviving entity and the Series D Preferred Units remain
outstanding with the terms thereof unchanged, or (b) the resulting, surviving or
transferee entity is a partnership, limited liability company or other
pass-through entity organized under the laws of any state and substitutes the
Series D Preferred Units for other interests in such entity having

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<PAGE>   90

substantially the same terms and rights as the Series D Preferred Units,
including with respect to distributions, voting rights and rights upon
liquidation, dissolution or winding-up, then the occurrence of any such event
shall not be deemed to materially and adversely affect such rights, privileges
or voting powers of the holders of the Series D Preferred Units; and provided
further, that any increase in the amount of Partnership Interests or the
creation or issuance of any other class or series of Partnership Interests
represented by Junior Units or Parity Preferred Units that are not issued to an
affiliate of the Partnership, other than the General Partner or the Operating
Partnership to the extent the issuance of such interests was to allow the
General Partner or the Operating Partnership to issue corresponding preferred
stock or preferred interests to persons who are not affiliates of the
Partnership (other than AMB to the extent AMB issues corresponding preferred
stock or preferred interests to persons who are not affiliates of the
Partnership or the Operating Partnership), shall not be deemed to materially and
adversely affect such rights, preferences, privileges or voting powers.

                  C. So long as any Series D Preferred Units remain outstanding,
the General Partner shall not, without the affirmative vote of the holders of at
least two-thirds of the Series D Preferred Units outstanding at the time, take
any action which would result in the termination of the right of the holders of
such units to effect an exchange pursuant to Section 17.8; provided however, no
such vote shall be required so long as the Series D Preferred Units (or any
interests substituted therefore pursuant to Section 17.6.B) remain outstanding
and are exchangeable for Series D Preferred Shares or stock in another entity
having substantially the same terms and rights as the Series D Preferred Shares.

                  D. Notwithstanding anything to the contrary contained in this
Agreement, including, without limitation, the provisions of Article 7 regarding
the management rights and responsibilities of the General Partner, whenever
distributions on any Series D Preferred Units shall remain unpaid for six or
more quarterly periods (i.e., the quarterly periods ending on the 25th day of
each March, June, September and December, or, if not a business day, the next
succeeding business day, beginning with the quarterly period ending June 25,
1999) (whether or not consecutive), the holders of 51% of either (i) such Series
D Preferred Units, in the event that the holders of the Series E Preferred Units
are not entitled to exercise management rights pursuant to Section 18.6.D, the
holders of the Series F Preferred Units are not entitled to exercise management
rights pursuant to Section 19.6D, the holders of the Series G Preferred Units
are not entitled to exercise management rights pursuant to Section 20.6D, the
holders of the Series H Preferred Units are not entitled to exercise management
rights pursuant to Section 21.6D, the holders of the Series I Preferred Units
are not entitled to exercise management rights pursuant to Section 22.6D and
that no Future Parity Preferred Unitholders (as defined below) are entitled to
exercise management rights similar to those to which the holders of Series D
Preferred Units, Series E Preferred Units, Series F Preferred Units, Series G
Preferred Units, Series H Preferred Units and Series I Preferred Units are
entitled to exercise pursuant to this Section 17.6.D, Section 18.6.D, Section
19.6D, Section 20.6D, Section 21.6D and Section 22.6D, respectively, or (ii) the
Parity Preferred Capital, in the event that holders of the Series E Preferred
Units, Series F Preferred Units, Series G Preferred Units, Series H Preferred
Units or Series I Preferred Units are entitled to exercise management rights
pursuant to Section 18.6.D, Section 19.6D, Section 20.6D, Section 21.6D or
Section 22.6D, respectively, or Future Parity Preferred Unitholders are entitled
to exercise management rights similar to those to which the holders of Series D
Preferred Units, Series E Preferred Units, Series F Preferred Units, Series G
Preferred Units, Series H Preferred Units and Series I Preferred Units are
entitled to exercise pursuant to this Section 17.6.D, Section 18.6.D, Section
19.6D, Section 20.6D, Section 21.6D and Section 22.6D, respectively, shall be
entitled to assume rights to manage the Partnership and perform actions related
thereto for the sole purpose of enforcing the Partnership's rights and remedies
as against obligees of the Partnership or other Persons from whom the
Partnership may be entitled to receive cash or other assets, until all
distributions accumulated on the Series D Preferred

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Units for all past quarterly periods and the distribution for the then-current
quarterly period shall have been fully-paid or declared and a sum sufficient for
the payment thereof irrevocably set aside in trust for payment in full;
provided, however, that no such holder or holders of Series D Preferred Units
may at any time take any action (or fail to take any action) if the consequence
of such action (or inaction) would be (i) to cause AMB to fail to qualify as a
REIT for federal or applicable state income tax purposes or (ii) to cause the
Partnership or the Operating Partnership to fail to qualify as a partnership for
federal or applicable state income tax purposes, or (iii) to cause the
Partnership, the Operating Partnership, the General Partner, or AMB to be
considered an "investment company" as defined in, or otherwise be subject to
regulation under, the Investment Company Act of 1940, as amended; and provided,
further, that solely for purposes of exercising the management rights set forth
in this Section 17.6.D, each holder of Series D Preferred Units shall be deemed
an Indemnitee, and shall be entitled to the benefits of the indemnification
provisions of Section 7.7 with respect to any and all action(s) taken (or
failure(s) to act) by a holder of Series D Preferred Units in the exercise of
(or failure(s) to exercise) the management rights described in this Section
17.6.D, including, without limitation, alleged breaches of the General Partner's
fiduciary duty to the Partners; and provided further, that the holders of the
Series D Preferred Units acknowledge and agree that the General Partner and the
Partnership shall be entitled to provide similar management rights to holders of
Parity Preferred Units that are issued by the Partnership following the date
hereof ("Future Parity Preferred Unitholders").

                  Section 17.7. Transfer Restrictions

                  The Series D Preferred Units shall be subject to the
provisions of Article 11 hereof. Notwithstanding any provision to the contrary
herein, no transfer of Series D Preferred Units, or other action by the holder
or holders of such Units, is permitted, without the consent of the General
Partner which consent may be given or withheld in its sole and absolute
discretion, if such transfer or other action would result in more than four
partners holding all outstanding Series D Preferred Units, Series H Preferred
Units and Series I Preferred Units within the meaning of Treasury Regulation
Section 1.7704-1(h)(1)(ii) (without regard to Treasury Regulation Section
1.7704-1(h)(3)(ii)); provided, however, that the General Partner's consent may
not be unreasonably withheld if (a) such transfer or other action would not
result in more than ten partners holding all outstanding Series D Preferred
Units, Series H Preferred Units and Series I Preferred Units within the meaning
of Treasury Regulation Section 1.7704-1(h)(1)(ii) (without regard to Treasury
Regulation Section 1.7704-1(h)(3)(ii)) and (b) the General Partner cannot rely
on Treasury Regulation Section 1.7704-1(h). In addition, no transfer may be made
to any person if such transfer would cause the exchange of the Series D
Preferred Units for Series D Preferred Shares, as provided herein, to be
required to be registered under the Securities Act of 1933, as amended, or any
state securities laws.

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                  Section 17.8. Exchange Rights

                  A. Right to Exchange. (i) Series D Preferred Units will be
exchangeable in whole but not in part unless expressly otherwise provided herein
at anytime on or after May 5, 2009, at the option of 51% of the holders of all
outstanding Series D Preferred Units, for authorized but previously unissued
Series D Preferred Shares at an exchange rate of one Series D Preferred Share
from AMB for one Series D Preferred Unit, subject to adjustment as described
below (the "Series D Exchange Price"); provided that the Series D Preferred
Units will become exchangeable at any time, in whole but not in part unless
expressly otherwise provided herein, at the option of 51% of the holders of all
outstanding Series D Preferred Units for Series D Preferred Shares if (y) at any
time full distributions shall not have been timely made on any Series D
Preferred Unit with respect to six (6) prior quarterly distribution periods,
whether or not consecutive; provided, however, that a distribution in respect of
Series D Preferred Units shall be considered timely made if made within two (2)
Business Days after the applicable Series D Preferred Unit Distribution Payment
Date if at the time of such late payment there shall not be any prior quarterly
distribution periods in respect of which full distributions were not timely made
or (z) upon receipt by a holder or holders of Series D Preferred Units of (A)
notice from the General Partner that the General Partner or a Subsidiary of the
General Partner has taken the position that the Partnership is, or upon the
consummation of an identified event in the immediate future will be, a PTP and
(B) an opinion rendered by independent counsel familiar with such matters
addressed to a holder or holders of Series D Preferred Units, that the
Partnership is or likely is, or upon the occurrence of a defined event in the
immediate future will be or likely will be, a PTP. In addition, the Series D
Preferred Units may be exchanged for Series D Preferred Shares, in whole but not
in part unless expressly otherwise provided herein, at the option of 51% of the
holders of all outstanding Series D Preferred Units after May 5, 2002 and prior
to May 5, 2009 if such holders of a Series D Preferred Units shall deliver to
the General Partner either (i) a private letter ruling addressed to such holder
of Series D Preferred Units or (ii) an opinion of independent counsel reasonably
acceptable to the General Partner based on a change in statute, the enactment of
temporary or final Treasury Regulations or the publication of a Revenue Ruling
or any other IRS release, in either case to the effect that an exchange of the
Series D Preferred Units at such earlier time would not cause the Series D
Preferred Units to be considered "stock and securities" within the meaning of
Section 351(e) of the Code for purposes of determining whether the holder of
such Series D Preferred Units is an "investment company" under Section 721(b) of
the Code if an exchange is permitted at such earlier date.

                  (ii) Notwithstanding anything to the contrary set forth in
Section 17.8.A(i), if a Series D Exchange Notice (as defined herein) has been
delivered to AMB and the General Partner, then the General Partner may, at its
option, within ten (10) Business Days after receipt of the Series D Exchange
Notice, elect to cause the Partnership to redeem all or a portion of the
outstanding Series D Preferred Units for cash in an amount equal to the original
Capital Contribution per Series D Preferred Unit and all accrued and unpaid
distributions thereon to the date of redemption. If the General Partner elects
to redeem fewer than all of the outstanding Series D Preferred Units, the number
of Series D Preferred Units held by each holder to be redeemed shall equal such
holder's pro rata share (based on the percentage of the aggregate number of
outstanding Series D Preferred Units that the total number of Series D Preferred
Units

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<PAGE>   93

held by such holder represents) of the aggregate number of Series D Preferred
Units being redeemed.

                  (iii) In the event an exchange of all Series D Preferred Units
pursuant to Section 17.8.A would violate the provisions on ownership limitation
of AMB set forth in Section 7 of Article Third of the Series D Articles
Supplementary, each holder of Series D Preferred Units shall be entitled to
exchange, pursuant to the provisions of Section 17.8.B, a number of Series D
Preferred Units which would comply with the provisions on the ownership
limitation of AMB set forth in such Section 7 of Article Third of the Series D
Articles Supplementary, with respect to such holder, and any Series D Preferred
Units not so exchanged (the "Series D Excess Units") shall be redeemed by the
Partnership for cash in an amount equal to the original Capital Contribution per
Series D Excess Unit, plus any accrued and unpaid distributions thereon to the
date of redemption subject to any restriction thereon contained in any debt
instrument or agreement of the Partnership. In the event an exchange would
result in Series D Excess Units, as a condition to such exchange, each holder of
such units agrees to provide representations and covenants reasonably requested
by AMB relating to (i) the widely held nature of the interests in such holder,
sufficient to assure AMB that the holder's ownership of stock of AMB (without
regard to the limits described above) will not cause any individual to own in
excess of 9.0% of the stock of AMB; and (ii) to the extent such Holder can so
represent and covenant without obtaining information from its owners (other than
one or more direct or indirect parent corporations, limited liability companies
or partnerships and not the holders of any interests in any such parent), the
Holder's ownership of tenants of the Partnership and its affiliates. For
purposes of determining the number of Series D Excess Units under this Section
17.8.A(iii), the "Ownership Limit" set forth in the Series D Articles
Supplementary shall be deemed to be 9.0%. To the extent the Partnership would
not be able to pay the cash set forth above in exchange for the Series D Excess
Units, and to the extent consistent with the REIT Charter, AMB agrees that it
will grant to the holders of the Series D Preferred Units exceptions to the
Ownership Limit set forth in the Series D Articles Supplementary sufficient to
allow such Holders to exchange all of their Series D Preferred Units for Series
D Preferred Shares; provided such holders furnish to AMB representations
acceptable to AMB in its sole and absolute discretion which assure AMB that such
exceptions will not jeopardize AMB's tax status as a REIT for purposes of
federal and applicable state law. Notwithstanding any provision of this
Agreement to the contrary, no Series D Limited Partner shall be entitled to
effect an exchange of Series D Preferred Units for Series D Preferred Shares to
the extent that ownership or right to acquire such shares would cause the
Partner or any other Person or, in the opinion of counsel selected by AMB, may
cause the Partner or any other Person, to violate the restrictions on ownership
and transfer of Series D Preferred Shares set forth in the REIT Charter. To the
extent any such attempted exchange for Series D Preferred Shares would be in
violation of the previous sentence, it shall be void ab initio and such Series D
Limited Partner shall not acquire any rights or economic interest in the Series
D Preferred Shares otherwise issuable upon such exchange.

                  (iv) The redemption of Series D Preferred Units described in
Section 17.8.A(ii) and (iii) shall be subject to the provisions of Section
17.5.B(i) and Section 17.5.C(ii); provided, however, that the term "Series D
Redemption Price" in such Sections 17.5.B(i) and 17.5.C(ii) shall be read to
mean the original Capital Contribution per Series D Preferred Unit being

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redeemed as set forth on Exhibit A plus all accrued and unpaid distributions to
the redemption date.

                  B. Procedure for Exchange of Series D Preferred Units and/or
Series D Redemption.

                  (i) Any exchange shall be exercised pursuant to a notice of
exchange (the "Series D Exchange Notice") delivered to AMB and the General
Partner by the Partners representing at least 51% of the outstanding Series D
Preferred Units (or by the Series D Contributor in the case of an exchange
pursuant to the last sentence of Section 17.8.A.(i) hereof) by (a) fax and (b)
by certified mail postage prepaid. AMB may effect any exchange of Series D
Preferred Units, or the General Partner may exercise its option to cause the
Partnership to redeem any portion of the Series D Preferred Units for cash
pursuant to Section 17.8.A(ii) or redeem Series D Excess Units pursuant to
Section 17.8.A(iii), by delivering to each holder of record of Series D
Preferred Units, within ten (10) Business Days following receipt of the Series D
Exchange Notice, (a) if the General Partner elects to cause the Partnership to
acquire any of the Series D Preferred Units then outstanding, (1) certificates
representing the Series D Preferred Shares being issued in exchange for the
Series D Preferred Units of such holder being exchanged and (2) a written notice
(a "Series D Redemption Notice") stating (A) the redemption date, which may be
the date of such Series D Redemption Notice or any other date which is not later
than sixty (60) days following the receipt of the Series D Exchange Notice, (B)
the redemption price, (C) the place or places where the Series D Preferred Units
are to be surrendered and (D) that distributions on the Series D Preferred Units
will cease to accrue on such redemption date, or (b) if the General Partner
elects to cause the Partnership to redeem all of the Series D Preferred Units
then outstanding in exchange for cash, a Series D Redemption Notice. Series D
Preferred Units which are redeemed shall be deemed canceled (and any
corresponding Partnership Interest represented thereby deemed terminated) on the
redemption date. Holders of Series D Preferred Units shall deliver any canceled
certificates representing Series D Preferred Units which have been exchanged or
redeemed to the office of General Partner (which currently is located at Pier 1,
Bay 1, San Francisco, California 94111) within ten (10) Business Days of the
exchange or redemption with respect thereto. Notwithstanding anything to the
contrary contained herein, any and all Series D Preferred Units to be exchanged
for Series D Preferred Shares pursuant to this Section 17.8 shall be so
exchanged in a single transaction at one time. As a condition to exchange, AMB
may require the holders of Series D Preferred Units to make such representations
as may be reasonably necessary for the General Partner to establish that the
issuance of Series D Preferred Shares pursuant to the exchange shall not be
required to be registered under the Securities Act or any state securities laws.
Any Series D Preferred Shares issued pursuant to this Section 17.8 shall be
delivered as shares which are duly authorized, validly issued, fully paid and
nonassessable, free of any pledge, lien, encumbrance or restriction other than
those provided in the REIT Charter, the Bylaws of AMB, the Securities Act and
relevant state securities or blue sky laws.

                  The certificates representing the Series D Preferred Shares
issued upon exchange of the Series D Preferred Units shall contain the following
legend:

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<PAGE>   95

                  THE SHARES REPRESENTED BY THIS CERTIFICATE MAY NOT BE
                  TRANSFERRED, SOLD, ASSIGNED, PLEDGED, HYPOTHECATED OR
                  OTHERWISE DISPOSED OF EXCEPT (A) PURSUANT TO AN EFFECTIVE
                  REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933, AS
                  AMENDED (THE "ACT"), AND STATE SECURITIES LAWS OR (B) IF THE
                  CORPORATION HAS BEEN FURNISHED WITH A SATISFACTORY OPINION OF
                  COUNSEL FOR THE HOLDER OF THE SHARES REPRESENTED HEREBY, OR
                  OTHER EVIDENCE SATISFACTORY TO THE CORPORATION, THAT SUCH
                  TRANSFER, SALE, ASSIGNMENT, PLEDGE, HYPOTHECATION OR OTHER
                  DISPOSITION IS EXEMPT FROM THE PROVISIONS OF SECTION 5 OF THE
                  ACT AND STATE SECURITIES LAWS AND THE RULES AND REGULATIONS
                  THEREUNDER.

                  (ii) In the event of an exchange of Series D Preferred Units
for Series D Preferred Shares, an amount equal to the accrued and unpaid
distributions to the date of exchange on any Series D Preferred Units tendered
for exchange shall (i) accrue on the Series D Preferred Shares into which such
Series D Preferred Units are exchanged, and (ii) continue to accrue on such
Series D Preferred Units, which shall remain outstanding following such
exchange, with the General Partner as the holder of such Series D Preferred
Units. Notwithstanding anything to the contrary set forth herein, in no event
shall a Holder of a Series D Preferred Unit that was validly exchanged for
Series D Preferred Shares pursuant to this Section (other than the General
Partner holding such Series D Preferred Unit following any such exchange),
receive a distribution out of Available Cash of the Partnership, if such Holder,
after exchange, is entitled to receive a distribution with respect to the Series
D Preferred Shares for which such Series D Preferred Unit was exchanged or
redeemed. Further for purposes of the foregoing, in the event of an exchange of
Series D Preferred Units for Series D Preferred Shares, if the accrued and
unpaid distributions per Series D Preferred Unit is not the same for each Series
D Preferred Unit, the accrued and unpaid distributions per Series D Preferred
Unit for each such Series D Preferred Unit shall be equal to the greatest amount
of such accrued and unpaid distributions per Series D Preferred Unit on any such
unit.

                  (iii) Fractional Series D Preferred Shares are not to be
issued upon exchange but, in lieu thereof, the General Partner will pay a cash
adjustment based upon the fair market value of the Series D Preferred Shares on
the day prior to the exchange date as determined in good faith by the board of
directors of the General Partner.

                  C. Adjustment of Series D Exchange Price. In case AMB shall be
a party to any transaction (including, without limitation, a merger,
consolidation, statutory share exchange, tender offer for all or substantially
all of AMB's capital stock or sale of all or substantially all of AMB's assets),
in each case as a result of which the Series D Preferred Shares will be
converted into the right to receive shares of capital stock, other securities or
other property (including cash or any combination thereof), each Series D
Preferred Unit will thereafter be exchangeable into the kind and amount of
shares of capital stock and other securities and property receivable

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<PAGE>   96

(including cash or any combination thereof) upon the consummation of such
transaction by a holder of that number of Series D Preferred Shares or fraction
thereof into which one Series D Preferred Unit was exchangeable immediately
prior to such transaction. AMB may not become a party to any such transaction
unless the terms thereof are consistent with the foregoing. AMB and the
Operating Partnership further agree that, notwithstanding any transaction to
which either may be a party (including, without limitation, any merger,
consolidation, statutory share exchange, tender offer for all or substantially
all of such entity's capital stock or partnership interests or sale of all or
substantially all of such entity's assets), immediately following any such
transaction, the issuer or issuers of any shares of capital stock and other
securities into which the Series D Preferred Units shall be exchangeable
pursuant to this Section 17.8 shall be the same issuer or issuers of shares of
capital stock and other securities into which both (i) the Series B Preferred
Units are then exchangeable (or, if the Series B Preferred Units have previously
been redeemed in full, would have been then exchangeable if then still
outstanding) and (ii) the Series C Preferred Units are then exchangeable (or, if
the Series C Preferred Units have previously been redeemed in full, would have
been then exchangeable if then still outstanding).

                  Section 17.9.     No Conversion Rights

                  The Series D Preferred Units shall not be convertible into any
other class or series of interest in the Partnership.

                  Section 17.10. No Sinking Fund

                  No sinking fund shall be established for the retirement or
redemption of Series D Preferred Units.

                                   ARTICLE 18.
                            SERIES E PREFERRED UNITS

                  Section 18.1. Designation and Number

                  A series of Partnership Units in the Partnership designated as
the 7.75% Series E Cumulative Redeemable Preferred Units (the "Series E
Preferred Units") is hereby established. The number of Series E Preferred Units
shall be 220,440.

                  Section 18.2. Ranking

                  The Series E Preferred Units shall, with respect to
distribution rights and rights upon voluntary or involuntary liquidation,
winding up or dissolution of the Partnership, rank (i) senior to the Common
Units and to all Partnership Units the terms of which provide that such
Partnership Units shall rank junior to the Series E Preferred Units; (ii) on a
parity with the Series C Preferred Units, the Series D Preferred Units and all
other Parity Preferred Units; and (iii) junior to all Partnership Units which
rank senior to the Series E Preferred Units.

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<PAGE>   97

                  Section 18.3. Distributions

                  A. Payment of Distributions. Subject to the rights of holders
of Parity Preferred Units as to the payment of distributions (including pursuant
to Sections 5.1, 16.3.A, 17.3A, 19.3A, 20.3A, 21.3A and 22.3A hereof), holders
of Series E Preferred Units will be entitled to receive, when, as and if
declared by the Partnership acting through the General Partner, out of Available
Cash, cumulative preferential cash distributions in an amount equal to the
Series E Priority Return. Such distributions will be payable (A) quarterly (such
quarterly periods for purposes of payment and accrual will be the quarterly
periods ending on the dates specified in this sentence and not calendar year
quarters) in arrears, on the 15th day of January, April, July and October of
each year and (B) in the event of (i) an exchange of Series E Preferred Units
into Series E Preferred Shares, or (ii) a redemption of Series E Preferred
Units, on the exchange date or redemption date, as applicable (each a "Series E
Preferred Unit Distribution Payment Date"), commencing on the first of such
payment dates to occur following their original date of issuance. If any date on
which distributions are to be made on the Series E Preferred Units is not a
Business Day, then payment of the distribution to be made on such date will be
made on the next succeeding day that is a Business Day (and without any interest
or other payment in respect of any such delay) except that, if such Business Day
is in the next succeeding calendar year, such payment shall be made on the
immediately preceding Business Day, in each case with the same force and effect
as if made on such date. Distributions on the Series E Preferred Units will be
made to the holders of record of the Series E Preferred Units on the relevant
record dates, which will be fifteen (15) days prior to the relevant Series E
Preferred Unit Distribution Payment Date (the "Series E Preferred Unit
Partnership Record Date"). For purposes of clarifying the relative distribution
priority rights among the Series I Preferred Units, Series H Preferred Units,
the Series G Preferred Units, the Series F Preferred Units, the Series E
Preferred Units, the Series D Preferred Units and the Series C Preferred Units,
the payment of distributions with respect to a series of such Preferred Units
prior to the payment of distributions with respect to another such series of
Preferred Units, solely as a result of the distribution payment dates with
respect to a series of Preferred Units occurring on a different date from
another series of Preferred Units, shall not be deemed to create a priority in
favor of one series of Preferred Units over any other series of Preferred Units.

                  B. Distributions Cumulative. Notwithstanding the foregoing,
distributions on the Series E Preferred Units will accrue whether or not the
terms and provisions of any agreement of the Partnership at any time prohibit
the current payment of distributions, whether or not the Partnership has
earnings, whether or not there are funds legally available for the payment of
such of such distributions and whether or not such distributions are authorized.
Accrued but unpaid distributions on the Series E Preferred Units will accumulate
as of the Preferred Unit Distribution Payment Date on which they first become
payable.

                  C. Priority as to Distributions. (i) So long as any Series E
Preferred Units are outstanding, no distribution of cash or other property shall
be authorized, declared, paid or set apart for payment on or with respect to any
class or series of Partnership Interest represented by Junior Units, nor shall
any Junior Units or Parity Preferred Units be redeemed, purchased or otherwise
acquired for any consideration (or any monies be paid to or made available for a
sinking fund for the redemption of any such Junior Units or Parity Preferred
Units) by the

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<PAGE>   98

Partnership (except by conversion into or exchange for other Junior Units or
Parity Preferred Units, as the case may be) unless, in each case, full
cumulative distributions have been or contemporaneously are authorized and paid
or authorized and a sum sufficient for the payment thereof set apart for such
payment on the Series E Preferred Units and all classes and series of
outstanding Parity Preferred Units for all distribution periods. The foregoing
sentence will not prohibit (a) distributions payable solely in Junior Units, (b)
the exchange of Junior Units or Parity Preferred Units into Partnership
Interests of the Partnership ranking junior to the Series E Preferred Units as
to distributions and upon voluntary and involuntary liquidation, dissolution or
winding up of the Partnership, or (c) distributions necessary to enable the
Operating Partnership to redeem partnership interests corresponding to Series E
Preferred Shares and any Parity Preferred Stock with respect to distributions or
Junior Stock to be purchased by AMB pursuant to the REIT Charter to preserve
AMB's status as a REIT; provided that such redemption shall be upon the same
terms as the corresponding stock purchase pursuant to the REIT Charter.

                  (ii) So long as distributions have not been paid in full (or a
sum sufficient for such full payment is not so set apart) upon the Series E
Preferred Units and any other Parity Preferred Units, all distributions
authorized and declared on the Series E Preferred Units and all classes or
series of outstanding Parity Preferred Units shall be authorized and declared
pro rata so that the amount of distributions authorized and declared per Series
E Preferred Unit and such other classes or series of Parity Preferred Units
shall in all cases bear to each other the same ratio that accrued distributions
per Series E Preferred Unit and such other classes or series of Parity Preferred
Units (which shall not include any accumulation in respect of unpaid
distributions for prior distribution periods if such class or series of Parity
Preferred Units do not have cumulative distribution rights) bear to each other.
No interest, or sum of money in lieu of interest, shall be payable in respect of
any distributions or payments on Series E Preferred Units which may be in
arrears.

                  (iii) Notwithstanding anything to the contrary set forth
herein, distributions on Partnership Interests held by either (a) the General
Partner, (b) the Operating Partnership or (c) any other holder of Partnership
Interests in the Partnership, in each case ranking junior to or on parity with
the Series E Preferred Units may be made, without preserving the priority of
distributions described in Sections 18.3.C(i) and (ii), but only to the extent
such distributions are required to preserve the REIT status of AMB, in its
capacity as sole general partner of the Operating Partnership and as sole
stockholder of the General Partner, and in the case of any holder other than the
General Partner only to the extent required by the Partnership Agreement;
provided, that the Partnership shall not be disproportionately burdened by this
provision relative to the cash flow generated by other assets owned directly or
indirectly by AMB.

                  D. No Further Rights. Holders of Series E Preferred Units
shall not be entitled to any distributions, whether payable in cash, other
property or otherwise, in excess of the full cumulative distributions described
herein.

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                  Section 18.4. Liquidation Proceeds

                  A. Distributions. Upon voluntary or involuntary liquidation,
dissolution or winding-up of the Partnership, distributions on the Series E
Preferred Units shall be made in accordance with Article 13 of this Agreement.

                  B. Notice. Written notice of any such voluntary or involuntary
liquidation, dissolution or winding-up of the Partnership, stating the payment
date or dates when, and the place or places where, the amounts distributable in
such circumstances shall be payable, shall be given by the General Partner
pursuant to Section 13.6 hereof.

                  C. No Further Rights. After payment of the full amount of the
liquidating distributions to which they are entitled, Holders of Series E
Preferred Units will have no right or claim to any of the remaining assets of
the Partnership.

                  D. Consolidation, Merger or Certain Other Transactions. None
of a consolidation or merger of the Partnership with or into another entity, a
merger of another entity with or into the Partnership, or a sale, lease,
transfer or conveyance of all or substantially all of the Partnership's property
or business shall be considered a liquidation, dissolution or winding up of the
Partnership.

                  Section 18.5. Series E Redemption

                  A. Series E Redemption. The Series E Preferred Units may not
be redeemed prior to August 31, 2004. On or after such date, the Partnership
shall have the right to redeem the Series E Preferred Units, in whole or in
part, at any time or from time to time, upon not less than 30 nor more than 60
days' written notice, at a redemption price, payable in cash (a "Series E
Redemption"), equal to the Capital Account balance of the holder of Series E
Preferred Units (the "Series E Redemption Price"); provided, however, that no
redemption pursuant to this Section 18.5 will be permitted if the Series E
Redemption Price does not equal or exceed the original Capital Contribution of
such holder plus the cumulative Series E Priority Return to the redemption date
to the extent not previously distributed. If fewer than all of the outstanding
Series E Preferred Units are to be redeemed, the Series E Preferred Units to be
redeemed shall be selected pro rata (as nearly as practicable without creating
fractional units).

                  B. Limitation on Series E Redemption. (i) The Series E
Redemption Price of the Series E Preferred Units (other than the portion thereof
consisting of accumulated but unpaid distributions) is payable solely out of the
sale proceeds of capital stock of AMB, which will be contributed by AMB to the
General Partner or the Operating Partnership and which in turn will be
contributed by the General Partner or the Operating Partnership to the
Partnership as an additional capital contribution, or out of the sale of limited
partner interests in the Partnership or the Operating Partnership and from no
other source. For purposes of the preceding sentence, "capital stock" means any
equity securities (including Common Stock and Preferred Stock (as such terms are
defined in the REIT Charter), depository shares, interests, participation or
other ownership interests (however designated) and any rights (other than debt
securities convertible into or exchangeable for equity securities) or options to
purchase any of the foregoing.

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<PAGE>   100

                  (ii) The Partnership may not redeem fewer than all of the
outstanding Series E Preferred Units unless all accumulated and unpaid
distributions have been paid on all Series E Preferred Units for all quarterly
distribution periods terminating on or prior to the date of redemption.

                  C. Procedures for Series E Redemption. (i) Notice of
redemption will be (i) faxed, and (ii) mailed by the Partnership, by certified
mail, postage prepaid, not less than 30 nor more than 60 days prior to the
redemption date, addressed to the respective holders of record of the Series E
Preferred Units at their respective addresses as they appear on the records of
the Partnership. No failure to give or defect in such notice shall affect the
validity of the proceedings for the redemption of any Series E Preferred Units
except as to the holder to whom such notice was defective or not given. In
addition to any information required by law, each such notice shall state: (a)
the redemption date, (b) the Series E Redemption Price, (c) the aggregate number
of Series E Preferred Units to be redeemed and if fewer than all of the
outstanding Series E Preferred Units are to be redeemed, the number of Series E
Preferred Units to be redeemed held by such holder, which number shall equal
such holder's pro rata share (based on the percentage of the aggregate number of
outstanding Series E Preferred Units that the total number of Series E Preferred
Units held by such holder represents) of the aggregate number of Series E
Preferred Units to be redeemed, (d) the place or places where such Series E
Preferred Units are to be surrendered for payment of the Series E Redemption
Price, (e) that distributions on the Series E Preferred Units to be redeemed
will cease to accumulate on such redemption date and (f) that payment of the
Series E Redemption Price will be made upon presentation and surrender of such
Series E Preferred Units.

                  (ii) If the Partnership gives a notice of redemption in
respect of Series E Preferred Units (which notice will be irrevocable) then, by
12:00 noon, New York City time, on the redemption date, the Partnership will
deposit irrevocably in trust for the benefit of the Series E Preferred Units
being redeemed funds sufficient to pay the applicable Series E Redemption Price
and will give irrevocable instructions and authority to pay such Series E
Redemption Price to the holders of the Series E Preferred Units upon surrender
of the Series E Preferred Units by such holders at the place designated in the
notice of redemption. On and after the date of redemption, distributions will
cease to accumulate on the Series E Preferred Units or portions thereof called
for redemption, unless the Partnership defaults in the payment thereof. If any
date fixed for redemption of Series E Preferred Units is not a Business Day,
then payment of the Series E Redemption Price payable on such date will be made
on the next succeeding day that is a Business Day (and without any interest or
other payment in respect of any such delay) except that, if such Business Day
falls in the next calendar year, such payment will be made on the immediately
preceding Business Day, in each case with the same force and effect as if made
on such date fixed for redemption. If payment of the Series E Redemption Price
is improperly withheld or refused and not paid by the Partnership, distributions
on such Series E Preferred Units will continue to accumulate from the original
redemption date to the date of payment, in which case the actual payment date
will be considered the date fixed for redemption for purposes of calculating the
applicable Series E Redemption Price.

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<PAGE>   101

                  Section 18.6. Voting and Certain Management Rights

                  A. General. Holders of the Series E Preferred Units will not
have any voting rights or right to consent to any matter requiring the consent
or approval of the Limited Partners, except as set forth below and in Section
7.3.E.

                  B. Certain Voting Rights. So long as any Series E Preferred
Units remains outstanding, the Partnership shall not, without the affirmative
vote of the holders of at least two-thirds of the Series E Preferred Units
outstanding at the time (i) authorize or create, or increase the authorized or
issued amount of, any class or series of Partnership Interests ranking prior to
the Series E Preferred Units with respect to payment of distributions or rights
upon liquidation, dissolution or winding-up or reclassify any Partnership
Interests of the Partnership into any such Partnership Interest, or create,
authorize or issue any obligations or security convertible into or evidencing
the right to purchase any such Partnership Interests, (ii) authorize or create,
or increase the authorized or issued amount of any Parity Preferred Units or
reclassify any Partnership Interest of the Partnership into any such Partnership
Interest or create, authorize or issue any obligations or security convertible
into or evidencing the right to purchase any such Partnership Interests but only
to the extent such Parity Preferred Units are issued to an affiliate of the
Partnership, other than AMB or the Operating Partnership to the extent the
issuance of such interests was to allow AMB or the Operating Partnership to
issue corresponding preferred stock or preferred interests to persons who are
not affiliates of the Partnership (other than AMB to the extent AMB issues
corresponding preferred stock to persons who are not affiliates of the
Partnership or the Operating Partnership) or (iii) either consolidate, merge
into or with, or convey, transfer or lease its assets substantially as an
entirety to, any corporation or other entity or amend, alter or repeal the
provisions of the Partnership Agreement (including, without limitation, this
Article 18 and Section 11.2), whether by merger, consolidation or otherwise, in
each case in a manner that would materially and adversely affect the powers,
special rights, preferences, privileges or voting power of the Series E
Preferred Units or the holders thereof; provided, however, that with respect to
the occurrence of any event set forth in (iii) above, so long as (a) the
Partnership is the surviving entity and the Series E Preferred Units remain
outstanding with the terms thereof unchanged, or (b) the resulting, surviving or
transferee entity is a partnership, limited liability company or other
pass-through entity organized under the laws of any state and substitutes the
Series E Preferred Units for other interests in such entity having substantially
the same terms and rights as the Series E Preferred Units, including with
respect to distributions, voting rights and rights upon liquidation, dissolution
or winding-up, then the occurrence of any such event shall not be deemed to
materially and adversely affect such rights, privileges or voting powers of the
holders of the Series E Preferred Units; and provided further, that any increase
in the amount of Partnership Interests or the creation or issuance of any other
class or series of Partnership Interests represented by Junior Units or Parity
Preferred Units that are not issued to an affiliate of the Partnership, other
than the General Partner or the Operating Partnership to the extent the issuance
of such interests was to allow the General Partner or the Operating Partnership
to issue corresponding preferred stock or preferred interests to persons who are
not affiliates of the Partnership (other than AMB to the extent AMB issues
corresponding preferred stock or preferred interests to persons who are not
affiliates of the Partnership or the Operating Partnership), shall not be deemed
to materially and adversely affect such rights, preferences, privileges or
voting powers.

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<PAGE>   102

                  C. So long as any Series E Preferred Units remain outstanding,
the General Partner shall not, without the affirmative vote of the holders of at
least two-thirds of the Series E Preferred Units outstanding at the time, take
any action which would result in the termination of the right of the holders of
such units to effect an exchange pursuant to Section 18.8; provided however, no
such vote shall be required so long as the Series E Preferred Units (or any
interests substituted therefore pursuant to Section 18.6.B) remain outstanding
and are exchangeable for Series E Preferred Shares or stock in another entity
having substantially the same terms and rights as the Series E Preferred Shares.

                  D. Notwithstanding anything to the contrary contained in this
Agreement, including, without limitation, the provisions of Article 7 regarding
the management rights and responsibilities of the General Partner, whenever
distributions on any Series E Preferred Units shall remain unpaid for six or
more quarterly periods (i.e., the quarterly periods ending on the 15th day of
each January, April, July and October, or, if not a business day, the next
succeeding business day, beginning with the quarterly period ending October 15,
1999) (whether or not consecutive), the holders of 51% of either (i) such Series
E Preferred Units, in the event that the holders of the Series D Preferred
Units, Series F Preferred Units, Series G Preferred Units, Series H Preferred
Units and Series I Preferred Units are not entitled to exercise management
rights pursuant to Section 17.6.D, Section 19.6.D, Section 20.6.D, Section
21.6.D and Section 22.6.D, respectively, and that no Future Parity Preferred
Unitholders are entitled to exercise management rights similar to those to which
the holders of Series D Preferred Units, Series E Preferred Units, Series F
Preferred Units, Series G Preferred Units, Series H Preferred Units and Series I
Preferred Units are entitled to exercise pursuant to Section 17.6.D, this
Section 18.6.D, Section 19.6.D, Section 20.6.D, Section 21.6.D and Section
22.6.D, respectively, or (ii) the Parity Preferred Capital, in the event that
holders of Series D Preferred Units, Series F Preferred Units, Series G
Preferred Units, Series H Preferred Units or Series I Preferred Units are
entitled to exercise management rights pursuant to Section 17.6.D, Section
19.6.D, Section 20.6.D, Section 21.6.D or Section 22.6.D, respectively, or
Future Parity Preferred Unitholders are entitled to exercise management rights
similar to those to which the holders of Series D Preferred Units, Series E
Preferred Units, Series F Preferred Units, Series G Preferred Units, Series H
Preferred Units, and Series I Preferred Units are entitled to exercise pursuant
to Section 17.6.D, Section 18.6.D, Section 19.6.D, Section 20.6.D, Section
21.6.D and Section 22.6.D, respectively, shall be entitled to assume rights to
manage the Partnership and perform actions related thereto for the sole purpose
of enforcing the Partnership's rights and remedies as against obligees of the
Partnership or other Persons from whom the Partnership may be entitled to
receive cash or other assets, until all distributions accumulated on the Series
E Preferred Units for all past quarterly periods and the distribution for the
then-current quarterly period shall have been fully-paid or declared and a sum
sufficient for the payment thereof irrevocably set aside in trust for payment in
full; provided, however, that no such holder or holders of Series E Preferred
Units may at any time take any action (or fail to take any action) if the
consequence of such action (or inaction) would be (i) to cause AMB to fail to
qualify as a REIT for federal or applicable state income tax purposes or (ii) to
cause the Partnership or the Operating Partnership to fail to qualify as a
partnership for federal or applicable state income tax purposes, or (iii) to
cause the Partnership, the Operating Partnership, the General Partner, or AMB to
be considered an "investment company" as defined in, or otherwise be subject to
regulation under, the Investment Company Act of 1940, as amended; and provided,
further, that solely for purposes of exercising the

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management rights set forth in this Section 18.6.D, each holder of Series E
Preferred Units shall be deemed an Indemnitee, and shall be entitled to the
benefits of the indemnification provisions of Section 7.7 with respect to any
and all action(s) taken (or failure(s) to act) by a holder of Series E Preferred
Units in the exercise of (or failure(s) to exercise) the management rights
described in this Section 18.6.D, including, without limitation, alleged
breaches of the General Partner's fiduciary duty to the Partners; and provided
further, that the holders of the Series E Preferred Units acknowledge and agree
that the General Partner and the Partnership has provided similar management
rights to the holders of the Series D Preferred Units and shall be entitled to
provide similar management rights to Future Parity Preferred Unitholders.

                  Section 18.7. Transfer Restrictions

                  The Series E Preferred Units shall be subject to the
provisions of Article 11 hereof. Notwithstanding any provision to the contrary
herein, no transfer of Series E Preferred Units, or other action by the holder
or holders of such Units, is permitted without the consent of the General
Partner which consent may be given or withheld in its sole and absolute
discretion, if such transfer or other action would result in more than four
partners holding all outstanding Series E Preferred Units within the meaning of
Treasury Regulation Section 1.7704-1(h)(1)(ii) (without regard to Treasury
Regulation Section 1.7704-1(h)(3)(ii)); provided, however, that the General
Partner's consent may not be unreasonably withheld if (a) such transfer or other
action would not result in more than ten partners holding all outstanding Series
E Preferred Units within the meaning of Treasury Regulation Section
1.7704-1(h)(1)(ii) (without regard to Treasury Regulation Section
1.7704-1(h)(3)(ii)) and (b) the General Partner cannot rely on Treasury
Regulation Section 1.7704-1(h). In addition, no transfer may be made to any
person if such transfer would cause the exchange of the Series E Preferred Units
for Series E Preferred Shares, as provided herein, to be required to be
registered under the Securities Act of 1933, as amended, or any state securities
laws.

                  Section 18.8. Exchange Rights

                  A. Right to Exchange. (i) Series E Preferred Units will be
exchangeable in whole but not in part unless expressly otherwise provided herein
at anytime on or after August 31, 2009, at the option of 51% of the holders of
all outstanding Series E Preferred Units, for authorized but previously unissued
Series E Preferred Shares at an exchange rate of one Series E Preferred Share
from AMB for one Series E Preferred Unit, subject to adjustment as described
below (the "Series E Exchange Price"); provided that the Series E Preferred
Units will become exchangeable at any time, in whole but not in part unless
expressly otherwise provided herein, at the option of 51% of the holders of all
outstanding Series E Preferred Units for Series E Preferred Shares if (y) at any
time full distributions shall not have been timely made on any Series E
Preferred Unit with respect to six (6) prior quarterly distribution periods,
whether or not consecutive; provided, however, that a distribution in respect of
Series E Preferred Units shall be considered timely made if made within two (2)
Business Days after the applicable Series E Preferred Unit Distribution Payment
Date if at the time of such late payment there shall not be any prior quarterly
distribution periods in respect of which full distributions were not timely made
or (z) upon receipt by a holder or holders of Series E Preferred Units of (A)
notice from the General Partner that the General Partner or a Subsidiary of the
General Partner has taken the

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position that the Partnership is, or upon the consummation of an identified
event in the immediate future will be, a PTP and (B) an opinion rendered by
independent counsel familiar with such matters addressed to a holder or holders
of Series E Preferred Units, that the Partnership is or likely is, or upon the
occurrence of a defined event in the immediate future will be or likely will be,
a PTP. In addition, the Series E Preferred Units may be exchanged for Series E
Preferred Shares, in whole but not in part unless expressly otherwise provided
herein, at the option of 51% of the holders of all outstanding Series E
Preferred Units after August 31, 2002 and prior to August 31, 2009 if such
holders of a Series E Preferred Units shall deliver to the General Partner
either (i) a private letter ruling addressed to such holder of Series E
Preferred Units or (ii) an opinion of independent counsel reasonably acceptable
to the General Partner based on a change in statute, the enactment of temporary
or final Treasury Regulations or the publication of a Revenue Ruling or any
other IRS release, in either case to the effect that an exchange of the Series E
Preferred Units at such earlier time would not cause the Series E Preferred
Units to be considered "stock and securities" within the meaning of Section
351(e) of the Code for purposes of determining whether the holder of such Series
E Preferred Units is an "investment company" under Section 721(b) of the Code if
an exchange is permitted at such earlier date.

                  (ii) Notwithstanding anything to the contrary set forth in
Section 18.8.A(i), if a Series E Exchange Notice (as defined herein) has been
delivered to AMB and the General Partner, then the General Partner may, at its
option, within ten (10) Business Days after receipt of the Series E Exchange
Notice, elect to cause the Partnership to redeem all or a portion of the
outstanding Series E Preferred Units for cash in an amount equal to the original
Capital Contribution per Series E Preferred Unit and all accrued and unpaid
distributions thereon to the date of redemption. If the General Partner elects
to redeem fewer than all of the outstanding Series E Preferred Units, the number
of Series E Preferred Units held by each holder to be redeemed shall equal such
holder's pro rata share (based on the percentage of the aggregate number of
outstanding Series E Preferred Units that the total number of Series E Preferred
Units held by such holder represents) of the aggregate number of Series E
Preferred Units being redeemed.

                  (iii) In the event an exchange of all Series E Preferred Units
pursuant to Section 18.8.A would violate the provisions on ownership limitation
of AMB set forth in Section 7 of Article Third of the Series E Articles
Supplementary, each holder of Series E Preferred Units shall be entitled to
exchange, pursuant to the provisions of Section 18.8.B, a number of Series E
Preferred Units which would comply with the provisions on the ownership
limitation of AMB set forth in such Section 7 of Article Third of the Series E
Articles Supplementary, with respect to such holder, and any Series E Preferred
Units not so exchanged (the "Series E Excess Units") shall be redeemed by the
Partnership for cash in an amount equal to the original Capital Contribution per
Series E Excess Unit, plus any accrued and unpaid distributions thereon to the
date of redemption subject to any restriction thereon contained in any debt
instrument or agreement of the Partnership. In the event an exchange would
result in Series E Excess Units, as a condition to such exchange, each holder of
such units agrees to provide representations and covenants reasonably requested
by AMB relating to (i) the widely held nature of the interests in such holder,
sufficient to assure AMB that the holder's ownership of stock of AMB (without
regard to the limits described above) will not cause any individual to own in
excess of 9.0%

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of the stock of AMB; and (ii) to the extent such Holder can so
represent and covenant without obtaining information from its owners (other than
one or more direct or indirect parent corporations, limited liability companies
or partnerships and not the holders of any interests in any such parent), the
Holder's ownership of tenants of the Partnership and its affiliates. For
purposes of determining the number of Series E Excess Units under this Section
18.8.A(iii), the "Ownership Limit" set forth in the Series E Articles
Supplementary shall be deemed to be 9.0%. To the extent the Partnership would
not be able to pay the cash set forth above in exchange for the Series E Excess
Units, and to the extent consistent with the REIT Charter, AMB agrees that it
will grant to the holders of the Series E Preferred Units exceptions to the
Ownership Limit set forth in the Series E Articles Supplementary sufficient to
allow such Holders to exchange all of their Series E Preferred Units for Series
E Preferred Shares; provided such holders furnish to AMB representations
acceptable to AMB in its sole and absolute discretion which assure AMB that such
exceptions will not jeopardize AMB's tax status as a REIT for purposes of
federal and applicable state law. Notwithstanding any provision of this
Agreement to the contrary, no Series E Limited Partner shall be entitled to
effect an exchange of Series E Preferred Units for Series E Preferred Shares to
the extent that ownership or right to acquire such shares would cause the
Partner or any other Person or, in the opinion of counsel selected by AMB, may
cause the Partner or any other Person, to violate the restrictions on ownership
and transfer of Series E Preferred Shares set forth in the REIT Charter. To the
extent any such attempted exchange for Series E Preferred Shares would be in
violation of the previous sentence, it shall be void ab initio and such Series E
Limited Partner shall not acquire any rights or economic interest in the Series
E Preferred Shares otherwise issuable upon such exchange.

                  (iv) The redemption of Series E Preferred Units described in
Section 18.8.A(ii) and (iii) shall be subject to the provisions of Section
18.5.B(i) and Section 18.5.C(ii); provided, however, that the term "Series E
Redemption Price" in such Sections 18.5.B(i) and 18.5.C(ii) shall be read to
mean the original Capital Contribution per Series E Preferred Unit being
redeemed as set forth on Exhibit A plus all accrued and unpaid distributions to
the redemption date.

                  B. Procedure for Exchange of Series E Preferred Units and/or
Series E Redemption.

                  (i) Any exchange shall be exercised pursuant to a notice of
exchange (the "Series E Exchange Notice") delivered to AMB and the General
Partner by the Partners representing at least 51% of the outstanding Series E
Preferred Units (or by the Series E Contributor in the case of an exchange
pursuant to the last sentence of Section 18.8.A.(i) hereof) by (a) fax and (b)
by certified mail postage prepaid. AMB may effect any exchange of Series E
Preferred Units, or the General Partner may exercise its option to cause the
Partnership to redeem any portion of the Series E Preferred Units for cash
pursuant to Section 18.8.A(ii) or redeem Series E Excess Units pursuant to
Section 18.8.A(iii), by delivering to each holder of record of Series E
Preferred Units, within ten (10) Business Days following receipt of the Series E
Exchange Notice, (a) if the General Partner elects to cause the Partnership to
acquire any of the Series E Preferred Units then outstanding, (1) certificates
representing the Series E Preferred Shares being issued in exchange for the
Series E Preferred Units of such holder being exchanged and (2) a written notice
(a "Series E Redemption Notice") stating (A) the redemption date, which may be
the date of such

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<PAGE>   106

Series E Redemption Notice or any other date which is not later than sixty (60)
days following the receipt of the Series E Exchange Notice, (B) the redemption
price, (C) the place or places where the Series E Preferred Units are to be
surrendered and (D) that distributions on the Series E Preferred Units will
cease to accrue on such redemption date, or (b) if the General Partner elects to
cause the Partnership to redeem all of the Series E Preferred Units then
outstanding in exchange for cash, a Series E Redemption Notice. Series E
Preferred Units which are redeemed shall be deemed canceled (and any
corresponding Partnership Interest represented thereby deemed terminated) on the
redemption date. Holders of Series E Preferred Units shall deliver any canceled
certificates representing Series E Preferred Units which have been exchanged or
redeemed to the office of the General Partner (which currently is located at
Pier 1, Bay 1, San Francisco, California 94111) within ten (10) Business Days of
the exchange or redemption with respect thereto. Notwithstanding anything to the
contrary contained herein, any and all Series E Preferred Units to be exchanged
for Series E Preferred Shares pursuant to this Section 18.8 shall be so
exchanged in a single transaction at one time. As a condition to exchange, AMB
may require the holders of Series E Preferred Units to make such representations
as may be reasonably necessary for the General Partner to establish that the
issuance of Series E Preferred Shares pursuant to the exchange shall not be
required to be registered under the Securities Act or any state securities laws.
Any Series E Preferred Shares issued pursuant to this Section 18.8 shall be
delivered as shares which are duly authorized, validly issued, fully paid and
nonassessable, free of any pledge, lien, encumbrance or restriction other than
those provided in the REIT Charter, the Bylaws of AMB, the Securities Act and
relevant state securities or blue sky laws.

                  The certificates representing the Series E Preferred Shares
issued upon exchange of the Series E Preferred Units shall contain the following
legend:

                  THE SHARES REPRESENTED BY THIS CERTIFICATE MAY NOT BE
                  TRANSFERRED, SOLD, ASSIGNED, PLEDGED, HYPOTHECATED OR
                  OTHERWISE DISPOSED OF EXCEPT (A) PURSUANT TO AN EFFECTIVE
                  REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933, AS
                  AMENDED (THE "ACT"), AND STATE SECURITIES LAWS OR (B) IF THE
                  CORPORATION HAS BEEN FURNISHED WITH A SATISFACTORY OPINION OF
                  COUNSEL FOR THE HOLDER OF THE SHARES REPRESENTED HEREBY, OR
                  OTHER EVIDENCE SATISFACTORY TO THE CORPORATION, THAT SUCH
                  TRANSFER, SALE, ASSIGNMENT, PLEDGE, HYPOTHECATION OR OTHER
                  DISPOSITION IS EXEMPT FROM THE PROVISIONS OF SECTION 5 OF THE
                  ACT AND STATE SECURITIES LAWS AND THE RULES AND REGULATIONS
                  THEREUNDER.

                  (ii) In the event of an exchange of Series E Preferred Units
for Series E Preferred Shares, an amount equal to the accrued and unpaid
distributions to the date of exchange on any Series E Preferred Units tendered
for exchange shall (i) accrue on the Series E Preferred Shares into which such
Series E Preferred Units are exchanged, and (ii) continue to accrue on

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such Series E Preferred Units, which shall remain outstanding following such
exchange, with the General Partner as the holder of such Series E Preferred
Units. Notwithstanding anything to the contrary set forth herein, in no event
shall a Holder of a Series E Preferred Unit that was validly exchanged for
Series E Preferred Shares pursuant to this Section (other than the General
Partner holding such Series E Preferred Unit following any such exchange),
receive a distribution out of Available Cash of the Partnership, if such Holder,
after exchange, is entitled to receive a distribution with respect to the Series
E Preferred Shares for which such Series E Preferred Unit was exchanged or
redeemed. Further, for purposes of the foregoing, in the event of an exchange of
Series E Preferred Units for Series E Preferred Shares, if the accrued and
unpaid distributions per Series E Preferred Unit is not the same for each Series
E Preferred Unit, the accrued and unpaid distributions per Series E Preferred
Unit for each such Series E Preferred Unit shall be equal to the greatest amount
of such accrued and unpaid distributions per Series E Preferred Unit on any such
unit.

                  (iii) Fractional Series E Preferred Shares are not to be
issued upon exchange but, in lieu thereof, the General Partner will pay a cash
adjustment based upon the fair market value of the Series E Preferred Shares on
the day prior to the exchange date as determined in good faith by the board of
directors of the General Partner.

                  C. Adjustment of Series E Exchange Price. In case AMB shall be
a party to any transaction (including, without limitation, a merger,
consolidation, statutory share exchange, tender offer for all or substantially
all of AMB's capital stock or sale of all or substantially all of AMB's assets),
in each case as a result of which the Series E Preferred Shares will be
converted into the right to receive shares of capital stock, other securities or
other property (including cash or any combination thereof), each Series E
Preferred Unit will thereafter be exchangeable into the kind and amount of
shares of capital stock and other securities and property receivable (including
cash or any combination thereof) upon the consummation of such transaction by a
holder of that number of Series E Preferred Shares or fraction thereof into
which one Series E Preferred Unit was exchangeable immediately prior to such
transaction. AMB may not become a party to any such transaction unless the terms
thereof are consistent with the foregoing. AMB and the Operating Partnership
further agree that, notwithstanding any transaction to which either may be a
party (including, without limitation, any merger, consolidation, statutory share
exchange, tender offer for all or substantially all of such entity's capital
stock or partnership interests or sale of all or substantially all of such
entity's assets), immediately following any such transaction, the issuer or
issuers of any shares of capital stock and other securities into which the
Series E Preferred Units shall be exchangeable pursuant to this Section 18.8
shall be the same issuer or issuers of shares of capital stock and other
securities into which (i) the Series B Preferred Units are then exchangeable
(or, if the Series B Preferred Units have previously been redeemed in full,
would have been then exchangeable if then still outstanding), (ii) the Series C
Preferred Units are then exchangeable (or, if the Series C Preferred Units have
previously been redeemed in full, would have been then exchangeable if then
still outstanding) and (iii) the Series D Preferred Units are then exchangeable
(or, if the Series D Preferred Units have previously been redeemed in full,
would have been then exchangeable if then still outstanding).

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                  Section 18.9. No Conversion Rights

                  The Series E Preferred Units shall not be convertible into any
other class or series of interest in the Partnership.

                  Section 18.10.    No Sinking Fund

                  No sinking fund shall be established for the retirement or
redemption of Series E Preferred Units.

                                  ARTICLE 19.
                            SERIES F PREFERRED UNITS

                  Section 19.1. Designation and Number

                  A series of Partnership Units in the Partnership designated as
the 7.95% Series F Cumulative Redeemable Preferred Units (the "Series F
Preferred Units") is hereby established. The number of Series F Preferred Units
shall be 397,439.

                  Section 19.2. Ranking

                  The Series F Preferred Units shall, with respect to
distribution rights and rights upon voluntary or involuntary liquidation,
winding up or dissolution of the Partnership, rank (i) senior to the Common
Units and to all Partnership Units the terms of which provide that such
Partnership Units shall rank junior to the Series F Preferred Units; (ii) on a
parity with the Series C Preferred Units, the Series D Preferred Units, the
Series E Preferred Units and all other Parity Preferred Units; and (iii) junior
to all Partnership Units which rank senior to the Series F Preferred Units.

                  Section 19.3. Distributions

                  A. Payment of Distributions. Subject to the rights of holders
of Parity Preferred Units as to the payment of distributions (including pursuant
to Sections 5.1, 16.3.A, 17.3A, 18.3A, 20.3A, 21.3A and 22.3A hereof), holders
of Series F Preferred Units will be entitled to receive, when, as and if
declared by the Partnership acting through the General Partner, out of Available
Cash, cumulative preferential cash distributions in an amount equal to the
Series F Priority Return. Such distributions will be payable (A) quarterly (such
quarterly periods for purposes of payment and accrual will be the quarterly
periods ending on the dates specified in this sentence and not calendar year
quarters) in arrears, on the 15th day of January, April, July and October of
each year and (B) in the event of (i) an exchange of Series F Preferred Units
into Series F Preferred Shares, or (ii) a redemption of Series F Preferred
Units, on the exchange date or redemption date, as applicable (each a "Series F
Preferred Unit Distribution Payment Date"), commencing on the first of such
payment dates to occur following their original date of issuance. If any date on
which distributions are to be made on the Series F Preferred Units is not a
Business Day, then payment of the distribution to be made on such date will be
made on the next succeeding day that is a Business Day (and without any interest
or other

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payment in respect of any such delay) except that, if such Business Day
is in the next succeeding calendar year, such payment shall be made on the
immediately preceding Business Day, in each case with the same force and effect
as if made on such date. Distributions on the Series F Preferred Units will be
made to the holders of record of the Series F Preferred Units on the relevant
record dates, which will be fifteen (15) days prior to the relevant Series F
Preferred Unit Distribution Payment Date (the "Series F Preferred Unit
Partnership Record Date"). For purposes of clarifying the relative distribution
priority rights among the Series I Preferred Units, Series H Preferred Units,
the Series G Preferred Units, the Series F Preferred Units, the Series E
Preferred Units, the Series D Preferred Units and the Series C Preferred Units,
the payment of distributions with respect to a series of such Preferred Units
prior to the payment of distributions with respect to another such series of
Preferred Units, solely as a result of the distribution payment dates with
respect to a series of Preferred Units occurring on a different date from
another series of Preferred Units, shall not be deemed to create a priority in
favor of one series of Preferred Units over any other series of Preferred Units.

                  B. Distributions Cumulative. Notwithstanding the foregoing,
distributions on the Series F Preferred Units will accrue whether or not the
terms and provisions of any agreement of the Partnership at any time prohibit
the current payment of distributions, whether or not the Partnership has
earnings, whether or not there are funds legally available for the payment of
such of such distributions and whether or not such distributions are authorized.
Accrued but unpaid distributions on the Series F Preferred Units will accumulate
as of the Preferred Unit Distribution Payment Date on which they first become
payable.

                  C. Priority as to Distributions. (i) So long as any Series F
Preferred Units are outstanding, no distribution of cash or other property shall
be authorized, declared, paid or set apart for payment on or with respect to any
class or series of Partnership Interest represented by Junior Units, nor shall
any Junior Units or Parity Preferred Units be redeemed, purchased or otherwise
acquired for any consideration (or any monies be paid to or made available for a
sinking fund for the redemption of any such Junior Units or Parity Preferred
Units) by the Partnership (except by conversion into or exchange for other
Junior Units or Parity Preferred Units, as the case may be) unless, in each
case, full cumulative distributions have been or contemporaneously are
authorized and paid or authorized and a sum sufficient for the payment thereof
set apart for such payment on the Series F Preferred Units and all classes and
series of outstanding Parity Preferred Units for all distribution periods. The
foregoing sentence will not prohibit (a) distributions payable solely in Junior
Units, (b) the exchange of Junior Units or Parity Preferred Units into
Partnership Interests of the Partnership ranking junior to the Series F
Preferred Units as to distributions and upon voluntary and involuntary
liquidation, dissolution or winding up of the Partnership, or (c) distributions
necessary to enable the Operating Partnership to redeem partnership interests
corresponding to Series F Preferred Shares and any Parity Preferred Stock with
respect to distributions or Junior Stock to be purchased by AMB pursuant to the
REIT Charter to preserve AMB's status as a REIT; provided that such redemption
shall be upon the same terms as the corresponding stock purchase pursuant to the
REIT Charter.

                  (ii) So long as distributions have not been paid in full (or a
sum sufficient for such full payment is not so set apart) upon the Series F
Preferred Units and any other Parity Preferred Units, all distributions
authorized and declared on the Series F Preferred Units and all

                                      104
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classes or series of outstanding Parity Preferred Units shall be authorized and
declared pro rata so that the amount of distributions authorized and declared
per Series F Preferred Unit and such other classes or series of Parity Preferred
Units shall in all cases bear to each other the same ratio that accrued
distributions per Series F Preferred Unit and such other classes or series of
Parity Preferred Units (which shall not include any accumulation in respect of
unpaid distributions for prior distribution periods if such class or series of
Parity Preferred Units do not have cumulative distribution rights) bear to each
other. No interest, or sum of money in lieu of interest, shall be payable in
respect of any distributions or payments on Series F Preferred Units which may
be in arrears.

                  (iii) Notwithstanding anything to the contrary set forth
herein, distributions on Partnership Interests held by either (a) the General
Partner, (b) the Operating Partnership or (c) any other holder of Partnership
Interests in the Partnership, in each case ranking junior to or on parity with
the Series F Preferred Units may be made, without preserving the priority of
distributions described in Sections 19.3.C(i) and (ii), but only to the extent
such distributions are required to preserve the REIT status of AMB, in its
capacity as sole general partner of the Operating Partnership and as sole
stockholder of the General Partner, and in the case of any holder other than the
General Partner only to the extent required by the Partnership Agreement;
provided, that the Partnership shall not be disproportionately burdened by this
provision relative to the cash flow generated by other assets owned directly or
indirectly by AMB.

                  D. No Further Rights. Holders of Series F Preferred Units
shall not be entitled to any distributions, whether payable in cash, other
property or otherwise, in excess of the full cumulative distributions described
herein.

                  Section 19.4.     Liquidation Proceeds

                  A. Distributions. Upon voluntary or involuntary liquidation,
dissolution or winding-up of the Partnership, distributions on the Series F
Preferred Units shall be made in accordance with Article 13 of this Agreement.

                  B. Notice. Written notice of any such voluntary or involuntary
liquidation, dissolution or winding-up of the Partnership, stating the payment
date or dates when, and the place or places where, the amounts distributable in
such circumstances shall be payable, shall be given by the General Partner
pursuant to Section 13.6 hereof.

                  C. No Further Rights. After payment of the full amount of the
liquidating distributions to which they are entitled, Holders of Series F
Preferred Units will have no right or claim to any of the remaining assets of
the Partnership.

                  D. Consolidation, Merger or Certain Other Transactions. None
of a consolidation or merger of the Partnership with or into another entity, a
merger of another entity with or into the Partnership, or a sale, lease,
transfer or conveyance of all or substantially all of the Partnership's property
or business shall be considered a liquidation, dissolution or winding up of the
Partnership.

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                  Section 19.5. Series F Redemption

                  A. Series F Redemption. The Series F Preferred Units may not
be redeemed prior to March 22, 2005. On or after such date, the Partnership
shall have the right to redeem the Series F Preferred Units, in whole or in
part, at any time or from time to time, upon not less than 30 nor more than 60
days' written notice, at a redemption price, payable in cash (a "Series F
Redemption"), equal to the Capital Account balance of the holder of Series F
Preferred Units (the "Series F Redemption Price"); provided, however, that no
redemption pursuant to this Section 19.5 will be permitted if the Series F
Redemption Price does not equal or exceed the original Capital Contribution of
such holder plus the cumulative Series F Priority Return to the redemption date
to the extent not previously distributed. If fewer than all of the outstanding
Series F Preferred Units are to be redeemed, the Series F Preferred Units to be
redeemed shall be selected pro rata (as nearly as practicable without creating
fractional units).

                  B. Limitation on Series F Redemption. (i) The Series F
Redemption Price of the Series F Preferred Units (other than the portion thereof
consisting of accumulated but unpaid distributions) is payable solely out of the
sale proceeds of capital stock of AMB, which will be contributed by AMB to the
General Partner or the Operating Partnership and which in turn will be
contributed by the General Partner or the Operating Partnership to the
Partnership as an additional capital contribution, or out of the sale of limited
partner interests in the Partnership or the Operating Partnership and from no
other source. For purposes of the preceding sentence, "capital stock" means any
equity securities (including Common Stock and Preferred Stock (as such terms are
defined in the REIT Charter), depository shares, interests, participation or
other ownership interests (however designated) and any rights (other than debt
securities convertible into or exchangeable for equity securities) or options to
purchase any of the foregoing.

                  (ii) The Partnership may not redeem fewer than all of the
outstanding Series F Preferred Units unless all accumulated and unpaid
distributions have been paid on all Series F Preferred Units for all quarterly
distribution periods terminating on or prior to the date of redemption.

                  C. Procedures for Series F Redemption. (i) Notice of
redemption will be (i) faxed, and (ii) mailed by the Partnership, by certified
mail, postage prepaid, not less than 30 nor more than 60 days prior to the
redemption date, addressed to the respective holders of record of the Series F
Preferred Units at their respective addresses as they appear on the records of
the Partnership. No failure to give or defect in such notice shall affect the
validity of the proceedings for the redemption of any Series F Preferred Units
except as to the holder to whom such notice was defective or not given. In
addition to any information required by law, each such notice shall state: (a)
the redemption date, (b) the Series F Redemption Price, (c) the aggregate number
of Series F Preferred Units to be redeemed and if fewer than all of the
outstanding Series F Preferred Units are to be redeemed, the number of Series F
Preferred Units to be redeemed held by such holder, which number shall equal
such holder's pro rata share (based on the percentage of the aggregate number of
outstanding Series F Preferred Units that the total number of Series F Preferred
Units held by such holder represents) of the aggregate number of Series F
Preferred Units to be redeemed, (d) the place or places where such Series F
Preferred Units are to be surrendered for payment of the Series F Redemption
Price, (e) that distributions on the Series F

                                      106
<PAGE>   112

Preferred Units to be redeemed will cease to accumulate on such redemption date
and (f) that payment of the Series F Redemption Price will be made upon
presentation and surrender of such Series F Preferred Units.

                  (ii) If the Partnership gives a notice of redemption in
respect of Series F Preferred Units (which notice will be irrevocable) then, by
12:00 noon, New York City time, on the redemption date, the Partnership will
deposit irrevocably in trust for the benefit of the Series F Preferred Units
being redeemed funds sufficient to pay the applicable Series F Redemption Price
and will give irrevocable instructions and authority to pay such Series F
Redemption Price to the holders of the Series F Preferred Units upon surrender
of the Series F Preferred Units by such holders at the place designated in the
notice of redemption. On and after the date of redemption, distributions will
cease to accumulate on the Series F Preferred Units or portions thereof called
for redemption, unless the Partnership defaults in the payment thereof. If any
date fixed for redemption of Series F Preferred Units is not a Business Day,
then payment of the Series F Redemption Price payable on such date will be made
on the next succeeding day that is a Business Day (and without any interest or
other payment in respect of any such delay) except that, if such Business Day
falls in the next calendar year, such payment will be made on the immediately
preceding Business Day, in each case with the same force and effect as if made
on such date fixed for redemption. If payment of the Series F Redemption Price
is improperly withheld or refused and not paid by the Partnership, distributions
on such Series F Preferred Units will continue to accumulate from the original
redemption date to the date of payment, in which case the actual payment date
will be considered the date fixed for redemption for purposes of calculating the
applicable Series F Redemption Price.

                  Section 19.6. Voting and Certain Management Rights

                  A. General. Holders of the Series F Preferred Units will not
have any voting rights or right to consent to any matter requiring the consent
or approval of the Limited Partners, except as set forth below and in Section
7.3.E.

                  B. Certain Voting Rights. So long as any Series F Preferred
Units remains outstanding, the Partnership shall not, without the affirmative
vote of the holders of at least two-thirds of the Series F Preferred Units
outstanding at the time (i) authorize or create, or increase the authorized or
issued amount of, any class or series of Partnership Interests ranking prior to
the Series F Preferred Units with respect to payment of distributions or rights
upon liquidation, dissolution or winding-up or reclassify any Partnership
Interests of the Partnership into any such Partnership Interest, or create,
authorize or issue any obligations or security convertible into or evidencing
the right to purchase any such Partnership Interests, (ii) authorize or create,
or increase the authorized or issued amount of any Parity Preferred Units or
reclassify any Partnership Interest of the Partnership into any such Partnership
Interest or create, authorize or issue any obligations or security convertible
into or evidencing the right to purchase any such Partnership Interests but only
to the extent such Parity Preferred Units are issued to an affiliate of the
Partnership, other than AMB or the Operating Partnership to the extent the
issuance of such interests was to allow AMB or the Operating Partnership to
issue corresponding preferred stock or preferred interests to persons who are
not affiliates of the Partnership (other than AMB to the extent AMB issues
corresponding preferred stock to persons who are not affiliates of the

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Partnership or the Operating Partnership) or (iii) either consolidate, merge
into or with, or convey, transfer or lease its assets substantially as an
entirety to, any corporation or other entity or amend, alter or repeal the
provisions of the Partnership Agreement (including, without limitation, this
Article 19 and Section 11.2), whether by merger, consolidation or otherwise, in
each case in a manner that would materially and adversely affect the powers,
special rights, preferences, privileges or voting power of the Series F
Preferred Units or the holders thereof; provided, however, that with respect to
the occurrence of any event set forth in (iii) above, so long as (a) the
Partnership is the surviving entity and the Series F Preferred Units remain
outstanding with the terms thereof unchanged, or (b) the resulting, surviving or
transferee entity is a partnership, limited liability company or other
pass-through entity organized under the laws of any state and substitutes the
Series F Preferred Units for other interests in such entity having substantially
the same terms and rights as the Series F Preferred Units, including with
respect to distributions, voting rights and rights upon liquidation, dissolution
or winding-up, then the occurrence of any such event shall not be deemed to
materially and adversely affect such rights, privileges or voting powers of the
holders of the Series F Preferred Units; and provided further, that any increase
in the amount of Partnership Interests or the creation or issuance of any other
class or series of Partnership Interests represented by Junior Units or Parity
Preferred Units that are not issued to an affiliate of the Partnership, other
than the General Partner or the Operating Partnership to the extent the issuance
of such interests was to allow the General Partner or the Operating Partnership
to issue corresponding preferred stock or preferred interests to persons who are
not affiliates of the Partnership (other than AMB to the extent AMB issues
corresponding preferred stock or preferred interests to persons who are not
affiliates of the Partnership or the Operating Partnership), shall not be deemed
to materially and adversely affect such rights, preferences, privileges or
voting powers.

                  C. So long as any Series F Preferred Units remain outstanding,
the General Partner shall not, without the affirmative vote of the holders of at
least two-thirds of the Series F Preferred Units outstanding at the time, take
any action which would result in the termination of the right of the holders of
such units to effect an exchange pursuant to Section 19.8; provided however, no
such vote shall be required so long as the Series F Preferred Units (or any
interests substituted therefore pursuant to Section 19.6.B) remain outstanding
and are exchangeable for Series F Preferred Shares or stock in another entity
having substantially the same terms and rights as the Series F Preferred Shares.

                  D. Notwithstanding anything to the contrary contained in this
Agreement, including, without limitation, the provisions of Article 7 regarding
the management rights and responsibilities of the General Partner, whenever
distributions on any Series F Preferred Units shall remain unpaid for six or
more quarterly periods (i.e., the quarterly periods ending on the 15th day of
each January, April, July and October, or, if not a business day, the next
succeeding business day, beginning with the quarterly period ending April 15,
2000) (whether or not consecutive), the holders of 51% of either (i) such Series
F Preferred Units, in the event that the holders of the Series D Preferred
Units, Series E Preferred Units, Series G Preferred Units, Series H Preferred
Units and Series I Preferred Units are not entitled to exercise management
rights pursuant to Section 17.6D, Section 18.6.D, Section 20.6.D, Section 21.6.D
and Section 22.6.D, respectively, and that no Future Parity Preferred
Unitholders are entitled to exercise management rights similar to those to which
the holders of Series D Preferred Units, Series E Preferred Units,

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Series F Preferred Units, Series G Preferred Units, Series H Preferred Units and
Series I Preferred Units are entitled to exercise pursuant to Section 17.6D,
Section 18.6.D, this Section 19.6.D, Section 20.6.D, Section 21.6.D and Section
22.6.D, respectively, or (ii) the Parity Preferred Capital, in the event that
holders of Series D Preferred Units, Series E Preferred Units, Series G
Preferred Units, Series H Preferred Units and Series I Preferred Units are
entitled to exercise management rights pursuant to Section 17.6D, Section
18.6.D, Section 20.6.D, Section 21.6.D or Section 22.6.D, respectively, or
Future Parity Preferred Unitholders are entitled to exercise management rights
similar to those to which the holders of Series D Preferred Units, Series E
Preferred Units, Series F Preferred Units, Series G Preferred Units, Series H
Preferred Units and Series I Preferred Units are entitled to exercise pursuant
to Section 17.6D, Section 18.6.D, this Section 19.6.D, Section 20.6.D, Section
21.6.D, and Section 22.6.D, respectively, shall be entitled to assume rights to
manage the Partnership and perform actions related thereto for the sole purpose
of enforcing the Partnership's rights and remedies as against obligees of the
Partnership or other Persons from whom the Partnership may be entitled to
receive cash or other assets, until all distributions accumulated on the Series
F Preferred Units for all past quarterly periods and the distribution for the
then-current quarterly period shall have been fully-paid or declared and a sum
sufficient for the payment thereof irrevocably set aside in trust for payment in
full; provided, however, that no such holder or holders of Series F Preferred
Units may at any time take any action (or fail to take any action) if the
consequence of such action (or inaction) would be (i) to cause AMB to fail to
qualify as a REIT for federal or applicable state income tax purposes or (ii) to
cause the Partnership or the Operating Partnership to fail to qualify as a
partnership for federal or applicable state income tax purposes, or (iii) to
cause the Partnership, the Operating Partnership, the General Partner, or AMB to
be considered an "investment company" as defined in, or otherwise be subject to
regulation under, the Investment Company Act of 1940, as amended; and provided,
further, that solely for purposes of exercising the management rights set forth
in this Section 19.6.D, each holder of Series F Preferred Units shall be deemed
an Indemnitee, and shall be entitled to the benefits of the indemnification
provisions of Section 7.7 with respect to any and all action(s) taken (or
failure(s) to act) by a holder of Series F Preferred Units in the exercise of
(or failure(s) to exercise) the management rights described in this Section
19.6.D, including, without limitation, alleged breaches of the General Partner's
fiduciary duty to the Partners; and provided further, that the holders of the
Series F Preferred Units acknowledge and agree that the General Partner and the
Partnership have provided similar management rights to the holders of the Series
D Preferred Units and the Series E Preferred Units and shall be entitled to
provide similar management rights to Future Parity Preferred Unitholders.

                  Section 19.7. Transfer Restrictions

                  The Series F Preferred Units shall be subject to the
provisions of Article 11 hereof. Notwithstanding any provision to the contrary
herein, no transfer of Series F Preferred Units, or other action by the holder
or holders of such Units, is permitted without the consent of the General
Partner which consent may be given or withheld in its sole and absolute
discretion, if such transfer or other action would result in more than four
partners holding all outstanding Series F Preferred Units within the meaning of
Treasury Regulation Section 1.7704-1(h)(1)(ii) (without regard to Treasury
Regulation Section 1.7704-1(h)(3)(ii)); provided, however, that the General
Partner's consent may not be unreasonably withheld if (a) such transfer or other
action

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<PAGE>   115

would not result in more than ten partners holding all outstanding Series F
Preferred Units within the meaning of Treasury Regulation Section
1.7704-1(h)(1)(ii) (without regard to Treasury Regulation Section
1.7704-1(h)(3)(ii)) and (b) the General Partner cannot rely on Treasury
Regulation Section 1.7704-1(h). In addition, no transfer may be made to any
person if such transfer would cause the exchange of the Series F Preferred Units
for Series F Preferred Shares, as provided herein, to be required to be
registered under the Securities Act of 1933, as amended, or any state securities
laws.

                  Section 19.8. Exchange Rights

                  A. Right to Exchange. (i) Series F Preferred Units will be
exchangeable in whole but not in part unless expressly otherwise provided herein
at anytime on or after March 22, 2010, at the option of 51% of the holders of
all outstanding Series F Preferred Units, for authorized but previously unissued
Series F Preferred Shares at an exchange rate of one Series F Preferred Share
from AMB for one Series F Preferred Unit, subject to adjustment as described
below (the "Series F Exchange Price"); provided that the Series F Preferred
Units will become exchangeable at any time, in whole but not in part unless
expressly otherwise provided herein, at the option of 51% of the holders of all
outstanding Series F Preferred Units for Series F Preferred Shares if (y) at any
time full distributions shall not have been timely made on any Series F
Preferred Unit with respect to six (6) prior quarterly distribution periods,
whether or not consecutive; provided, however, that a distribution in respect of
Series F Preferred Units shall be considered timely made if made within two (2)
Business Days after the applicable Series F Preferred Unit Distribution Payment
Date if at the time of such late payment there shall not be any prior quarterly
distribution periods in respect of which full distributions were not timely made
or (z) upon receipt by a holder or holders of Series F Preferred Units of (A)
notice from the General Partner that the General Partner or a Subsidiary of the
General Partner has taken the position that the Partnership is, or upon the
consummation of an identified event in the immediate future will be, a PTP and
(B) an opinion rendered by independent counsel familiar with such matters
addressed to a holder or holders of Series F Preferred Units, that the
Partnership is or likely is, or upon the occurrence of a defined event in the
immediate future will be or likely will be, a PTP.

                   In addition, the Series F Preferred Units may be exchanged
for Series F Preferred Shares, in whole but not in part unless expressly
otherwise provided herein, at the option of 51% of the holders of all
outstanding Series F Preferred Units after March 22, 2003 and prior to March 22,
2010 if such holders of a Series F Preferred Units shall deliver to the General
Partner either (i) a private letter ruling addressed to such holder of Series F
Preferred Units or (ii) an opinion of independent counsel reasonably acceptable
to the General Partner based on a change in statute, the enactment of temporary
or final Treasury Regulations or the publication of a Revenue Ruling or any
other IRS release, in either case to the effect that an exchange of the Series F
Preferred Units at such earlier time would not cause the Series F Preferred
Units to be considered "stock and securities" within the meaning of Section
351(e) of the Code for purposes of determining whether the holder of such Series
F Preferred Units is an "investment company" under Section 721(b) of the Code if
an exchange is permitted at such earlier date.

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<PAGE>   116

                  In addition, Series F Preferred Units will become exchangeable
in whole but not in part unless expressly otherwise provided herein, at the
option of 51% of the holders of all outstanding Series F Preferred Units for
Series F Preferred Shares at an exchange rate of one Series F Preferred Share
from AMB for one Series F Preferred Unit if, (i) at any time such holders
conclude based on results or projected results that there exists (in the
reasonable judgment of such holders) an imminent and substantial risk that such
holders' interest in the Partnership represents or will represent more than
19.0% of the total profits of or capital interests in the Partnership for a
taxable year, (ii) such holders deliver to the General Partner an opinion of
independent counsel, reasonably acceptable to the General Partner to the effect
that there is a substantial risk that their interest in the Partnership does not
or will not satisfy the 19.0% limit and (iii) the General Partner agrees with
the conclusions referred to in clauses (i) and (ii) of this sentence, such
agreement not to be unreasonably withheld.

                  Furthermore, Series F Preferred Units will become exchangeable
in whole but not in part unless expressly otherwise provided herein, at the
option of 51% of the holders of all outstanding Series F Preferred Units for
Series F Preferred Shares at an exchange rate of one Series F Preferred Share
from AMB for one Series F Preferred Unit if (i) the Series F Preferred Units are
held by a REIT and (ii) excluding the effect of any loans and advances, from
time to time, from the Partnership to the Operating Partnership or any other
affiliate or related entity not exceeding 15% of the Partnership's total assets,
for purposes of the 5% test of Section 856(c)(4)(B) of the Code, either (A) the
Partnership is advised by independent counsel that, based on the assets and
income of the Partnership for a taxable year after 1998, the Partnership would
not satisfy the income and assets tests of Section 856 of the Code for such
taxable year if the Partnership were a real estate investment trust within the
meaning of the Code; or (B) the holder of the Series F Preferred Units shall
deliver to the General Partner an opinion of independent counsel reasonably
acceptable to the General Partner to the effect that, based on the assets and
income of the Partnership for a taxable year after 1999, the Partnership would
not satisfy the income and assets tests of Section 856 of the Code for such
taxable year if the Partnership were a real estate investment trust within the
meaning of the Code and that such failure would create a meaningful risk that
the holder of the Series F Preferred Units would fail to maintain its
qualification as a real estate investment trust.

                  (ii) Notwithstanding anything to the contrary set forth in
Section 19.8.A(i), if a Series F Exchange Notice (as defined herein) has been
delivered to AMB and the General Partner, then the General Partner may, at its
option, within ten (10) Business Days after receipt of the Series F Exchange
Notice, elect to cause the Partnership to redeem all or a portion of the
outstanding Series F Preferred Units for cash in an amount equal to the original
Capital Contribution per Series F Preferred Unit and all accrued and unpaid
distributions thereon to the date of redemption. If the General Partner elects
to redeem fewer than all of the outstanding Series F Preferred Units, the number
of Series F Preferred Units held by each holder to be redeemed shall equal such
holder's pro rata share (based on the percentage of the aggregate number of
outstanding Series F Preferred Units that the total number of Series F Preferred
Units held by such holder represents) of the aggregate number of Series F
Preferred Units being redeemed.

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                  (iii) In the event an exchange of all Series F Preferred Units
pursuant to Section 19.8.A would violate the provisions on ownership limitation
of AMB set forth in Section 7 of Article Third of the Series F Articles
Supplementary, each holder of Series F Preferred Units shall be entitled to
exchange, pursuant to the provisions of Section 19.8.B, a number of Series F
Preferred Units which would comply with the provisions on the ownership
limitation of AMB set forth in such Section 7 of Article Third of the Series F
Articles Supplementary, with respect to such holder, and any Series F Preferred
Units not so exchanged (the "Series F Excess Units") shall be redeemed by the
Partnership for cash in an amount equal to the original Capital Contribution per
Series F Excess Unit, plus any accrued and unpaid distributions thereon to the
date of redemption subject to any restriction thereon contained in any debt
instrument or agreement of the Partnership. In the event an exchange would
result in Series F Excess Units, as a condition to such exchange, each holder of
such units agrees to provide representations and covenants reasonably requested
by AMB relating to (i) the widely held nature of the interests in such holder,
sufficient to assure AMB that the holder's ownership of stock of AMB (without
regard to the limits described above) will not cause any individual to own in
excess of 9.0% of the stock of AMB; and (ii) to the extent such Holder can so
represent and covenant without obtaining information from its owners (other than
one or more direct or indirect parent corporations, limited liability companies
or partnerships and not the holders of any interests in any such parent), the
Holder's ownership of tenants of the Partnership and its affiliates. For
purposes of determining the number of Series F Excess Units under this Section
19.8.A(iii), the "Ownership Limit" set forth in the Series F Articles
Supplementary shall be deemed to be 9.0%. To the extent the Partnership would
not be able to pay the cash set forth above in exchange for the Series F Excess
Units, and to the extent consistent with the REIT Charter, AMB agrees that it
will grant to the holders of the Series F Preferred Units exceptions to the
Ownership Limit set forth in the Series F Articles Supplementary sufficient to
allow such Holders to exchange all of their Series F Preferred Units for Series
F Preferred Shares; provided such holders furnish to AMB representations
acceptable to AMB in its sole and absolute discretion which assure AMB that such
exceptions will not jeopardize AMB's tax status as a REIT for purposes of
federal and applicable state law. Notwithstanding any provision of this
Agreement to the contrary, no Series F Limited Partner shall be entitled to
effect an exchange of Series F Preferred Units for Series F Preferred Shares to
the extent that ownership or right to acquire such shares would cause the
Partner or any other Person or, in the opinion of counsel selected by AMB, may
cause the Partner or any other Person, to violate the restrictions on ownership
and transfer of Series F Preferred Shares set forth in the REIT Charter. To the
extent any such attempted exchange for Series F Preferred Shares would be in
violation of the previous sentence, it shall be void ab initio and such Series F
Limited Partner shall not acquire any rights or economic interest in the Series
F Preferred Shares otherwise issuable upon such exchange.

                  (iv) The redemption of Series F Preferred Units described in
Section 19.8.A(ii) and (iii) shall be subject to the provisions of Section
19.5.B(i) and Section 19.5.C(ii); provided, however, that the term "Series F
Redemption Price" in such Sections 19.5.B(i) and 19.5.C(ii) shall be read to
mean the original Capital Contribution per Series F Preferred Unit being
redeemed as set forth on Exhibit A plus all accrued and unpaid distributions to
the redemption date.

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                  B. Procedure for Exchange of Series F Preferred Units and/or
Series F Redemption.

                  (i) Any exchange shall be exercised pursuant to a notice of
exchange (the "Series F Exchange Notice") delivered to AMB and the General
Partner by the Partners representing at least 51% of the outstanding Series F
Preferred Units (or by the Series F Contributor in the case of an exchange
pursuant to the last sentence of Section 19.8.A.(i) hereof) by (a) fax and (b)
by certified mail postage prepaid. AMB may effect any exchange of Series F
Preferred Units, or the General Partner may exercise its option to cause the
Partnership to redeem any portion of the Series F Preferred Units for cash
pursuant to Section 19.8.A(ii) or redeem Series F Excess Units pursuant to
Section 19.8.A(iii), by delivering to each holder of record of Series F
Preferred Units, within ten (10) Business Days following receipt of the Series F
Exchange Notice, (a) if the General Partner elects to cause the Partnership to
acquire any of the Series F Preferred Units then outstanding, (1) certificates
representing the Series F Preferred Shares being issued in exchange for the
Series F Preferred Units of such holder being exchanged and (2) a written notice
(a "Series F Redemption Notice") stating (A) the redemption date, which may be
the date of such Series F Redemption Notice or any other date which is not later
than sixty (60) days following the receipt of the Series F Exchange Notice, (B)
the redemption price, (C) the place or places where the Series F Preferred Units
are to be surrendered and (D) that distributions on the Series F Preferred Units
will cease to accrue on such redemption date, or (b) if the General Partner
elects to cause the Partnership to redeem all of the Series F Preferred Units
then outstanding in exchange for cash, a Series F Redemption Notice. Series F
Preferred Units which are redeemed shall be deemed canceled (and any
corresponding Partnership Interest represented thereby deemed terminated) on the
redemption date. Holders of Series F Preferred Units shall deliver any canceled
certificates representing Series F Preferred Units which have been exchanged or
redeemed to the office of the General Partner (which currently is located at
Pier 1, Bay 1, San Francisco, California 94111) within ten (10) Business Days of
the exchange or redemption with respect thereto. Notwithstanding anything to the
contrary contained herein, any and all Series F Preferred Units to be exchanged
for Series F Preferred Shares pursuant to this Section 19.8 shall be so
exchanged in a single transaction at one time. As a condition to exchange, AMB
may require the holders of Series F Preferred Units to make such representations
as may be reasonably necessary for the General Partner to establish that the
issuance of Series F Preferred Shares pursuant to the exchange shall not be
required to be registered under the Securities Act or any state securities laws.
Any Series F Preferred Shares issued pursuant to this Section 19.8 shall be
delivered as shares which are duly authorized, validly issued, fully paid and
nonassessable, free of any pledge, lien, encumbrance or restriction other than
those provided in the REIT Charter, the Bylaws of AMB, the Securities Act and
relevant state securities or blue sky laws.

                  The certificates representing the Series F Preferred Shares
issued upon exchange of the Series F Preferred Units shall contain the following
legend:

                  THE SHARES REPRESENTED BY THIS CERTIFICATE MAY NOT BE
                  TRANSFERRED, SOLD, ASSIGNED, PLEDGED, HYPOTHECATED OR
                  OTHERWISE DISPOSED OF EXCEPT (A) PURSUANT TO AN EFFECTIVE
                  REGISTRATION

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                  STATEMENT UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE
                  "ACT"), AND STATE SECURITIES LAWS OR (B) IF THE CORPORATION
                  HAS BEEN FURNISHED WITH A SATISFACTORY OPINION OF COUNSEL FOR
                  THE HOLDER OF THE SHARES REPRESENTED HEREBY, OR OTHER EVIDENCE
                  SATISFACTORY TO THE CORPORATION, THAT SUCH TRANSFER, SALE,
                  ASSIGNMENT, PLEDGE, HYPOTHECATION OR OTHER DISPOSITION IS
                  EXEMPT FROM THE PROVISIONS OF SECTION 5 OF THE ACT AND STATE
                  SECURITIES LAWS AND THE RULES AND REGULATIONS THEREUNDER.

                  (ii) In the event of an exchange of Series F Preferred Units
for Series F Preferred Shares, an amount equal to the accrued and unpaid
distributions to the date of exchange on any Series F Preferred Units tendered
for exchange shall (i) accrue on the Series F Preferred Shares into which such
Series F Preferred Units are exchanged, and (ii) continue to accrue on such
Series F Preferred Units, which shall remain outstanding following such
exchange, with the General Partner as the holder of such Series F Preferred
Units. Notwithstanding anything to the contrary set forth herein, in no event
shall a Holder of a Series F Preferred Unit that was validly exchanged for
Series F Preferred Shares pursuant to this Section (other than the General
Partner holding such Series F Preferred Unit following any such exchange),
receive a distribution out of Available Cash of the Partnership, if such Holder,
after exchange, is entitled to receive a distribution with respect to the Series
F Preferred Shares for which such Series F Preferred Unit was exchanged or
redeemed. Further, for purposes of the foregoing, in the event of an exchange of
Series F Preferred Units for Series F Preferred Shares, if the accrued and
unpaid distributions per Series F Preferred Unit is not the same for each Series
F Preferred Unit, the accrued and unpaid distributions per Series F Preferred
Unit for each such Series F Preferred Unit shall be equal to the greatest amount
of such accrued and unpaid distributions per Series F Preferred Unit on any such
unit.

                  (iii) Fractional Series F Preferred Shares are not to be
issued upon exchange but, in lieu thereof, the General Partner will pay a cash
adjustment based upon the fair market value of the Series F Preferred Shares on
the day prior to the exchange date as determined in good faith by the board of
directors of the General Partner.

                  C. Adjustment of Series F Exchange Price. In case AMB shall be
a party to any transaction (including, without limitation, a merger,
consolidation, statutory share exchange, tender offer for all or substantially
all of AMB's capital stock or sale of all or substantially all of AMB's assets),
in each case as a result of which the Series F Preferred Shares will be
converted into the right to receive shares of capital stock, other securities or
other property (including cash or any combination thereof), each Series F
Preferred Unit will thereafter be exchangeable into the kind and amount of
shares of capital stock and other securities and property receivable (including
cash or any combination thereof) upon the consummation of such transaction by a
holder of that number of Series F Preferred Shares or fraction thereof into
which one Series F Preferred Unit was exchangeable immediately prior to such
transaction. AMB may not become a party to any such transaction unless the terms
thereof are consistent with the foregoing. AMB and the

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<PAGE>   120

Operating Partnership further agree that, notwithstanding any transaction to
which either may be a party (including, without limitation, any merger,
consolidation, statutory share exchange, tender offer for all or substantially
all of such entity's capital stock or partnership interests or sale of all or
substantially all of such entity's assets), immediately following any such
transaction, the issuer or issuers of any shares of capital stock and other
securities into which the Series F Preferred Units shall be exchangeable
pursuant to this Section 19.8 shall be the same issuer or issuers of shares of
capital stock and other securities into which (i) the Series B Preferred Units
are then exchangeable (or, if the Series B Preferred Units have previously been
redeemed in full, would have been then exchangeable if then still outstanding),
(ii) the Series C Preferred Units are then exchangeable (or, if the Series C
Preferred Units have previously been redeemed in full, would have been then
exchangeable if then still outstanding), (iii) the Series D Preferred Units are
then exchangeable (or, if the Series D Preferred Units have previously been
redeemed in full, would have been then exchangeable if then still outstanding)
and (iv) the Series E Preferred Units are then exchangeable (or, if the Series E
Preferred Units have previously been redeemed in full, would have been then
exchangeable if then still outstanding).

                  Section 19.9. No Conversion Rights

                  The Series F Preferred Units shall not be convertible into any
other class or series of interest in the Partnership.

                  Section 19.10. No Sinking Fund

                  No sinking fund shall be established for the retirement or
redemption of Series F Preferred Units.

                                   ARTICLE 20.
                            SERIES G PREFERRED UNITS

                  Section 20.1. Designation and Number

                  A series of Partnership Units in the Partnership designated as
the 7.95% Series G Cumulative Redeemable Preferred Units (the "Series G
Preferred Units") is hereby established. The number of Series G Preferred Units
shall be 20,000.

                  Section 20.2. Ranking

                  The Series G Preferred Units shall, with respect to
distribution rights and rights upon voluntary or involuntary liquidation,
winding up or dissolution of the Partnership, rank (i) senior to the Common
Units and to all Partnership Units the terms of which provide that such
Partnership Units shall rank junior to the Series G Preferred Units; (ii) on a
parity with the Series C Preferred Units, the Series D Preferred Units, the
Series E Preferred Units, the Series F Preferred Units and all other Parity
Preferred Units; and (iii) junior to all Partnership Units which rank senior to
the Series G Preferred Units.

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                  Section 20.3.     Distributions

                  A. Payment of Distributions. Subject to the rights of holders
of Parity Preferred Units as to the payment of distributions (including pursuant
to Sections 5.1, 16.3.A, 17.3A, 18.3A, 19.3A, 21.3A and 22.3A hereof), holders
of Series G Preferred Units will be entitled to receive, when, as and if
declared by the Partnership acting through the General Partner, out of Available
Cash, cumulative preferential cash distributions in an amount equal to the
Series G Priority Return. Such distributions will be payable (A) quarterly (such
quarterly periods for purposes of payment and accrual will be the quarterly
periods ending on the dates specified in this sentence and not calendar year
quarters) in arrears, on the 15th day of January, April, July and October of
each year and (B) in the event of (i) an exchange of Series G Preferred Units
into Series G Preferred Shares, or (ii) a redemption of Series G Preferred
Units, on the exchange date or redemption date, as applicable (each a "Series G
Preferred Unit Distribution Payment Date"), commencing on the first of such
payment dates to occur following their original date of issuance. If any date on
which distributions are to be made on the Series G Preferred Units is not a
Business Day, then payment of the distribution to be made on such date will be
made on the next succeeding day that is a Business Day (and without any interest
or other payment in respect of any such delay) except that, if such Business Day
is in the next succeeding calendar year, such payment shall be made on the
immediately preceding Business Day, in each case with the same force and effect
as if made on such date. Distributions on the Series G Preferred Units will be
made to the holders of record of the Series G Preferred Units on the relevant
record dates, which will be fifteen (15) days prior to the relevant Series G
Preferred Unit Distribution Payment Date (the "Series G Preferred Unit
Partnership Record Date"). For purposes of clarifying the relative distribution
priority rights among the Series I Preferred Units, Series H Preferred Units,
the Series G Preferred Units, the Series F Preferred Units, the Series E
Preferred Units, the Series D Preferred Units and the Series C Preferred Units,
the payment of distributions with respect to a series of such Preferred Units
prior to the payment of distributions with respect to another such series of
Preferred Units, solely as a result of the distribution payment dates with
respect to a series of Preferred Units occurring on a different date from
another series of Preferred Units, shall not be deemed to create a priority in
favor of one series of Preferred Units over any other series of Preferred Units.

                  B. Distributions Cumulative. Notwithstanding the foregoing,
distributions on the Series G Preferred Units will accrue whether or not the
terms and provisions of any agreement of the Partnership at any time prohibit
the current payment of distributions, whether or not the Partnership has
earnings, whether or not there are funds legally available for the payment of
such of such distributions and whether or not such distributions are authorized.
Accrued but unpaid distributions on the Series G Preferred Units will accumulate
as of the Preferred Unit Distribution Payment Date on which they first become
payable.

                  C. Priority as to Distributions. (i) So long as any Series G
Preferred Units are outstanding, no distribution of cash or other property shall
be authorized, declared, paid or set apart for payment on or with respect to any
class or series of Partnership Interest represented by Junior Units, nor shall
any Junior Units or Parity Preferred Units be redeemed, purchased or otherwise
acquired for any consideration (or any monies be paid to or made available for a
sinking fund for the redemption of any such Junior Units or Parity Preferred
Units) by the

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Partnership (except by conversion into or exchange for other Junior Units or
Parity Preferred Units, as the case may be) unless, in each case, full
cumulative distributions have been or contemporaneously are authorized and paid
or authorized and a sum sufficient for the payment thereof set apart for such
payment on the Series G Preferred Units and all classes and series of
outstanding Parity Preferred Units for all distribution periods. The foregoing
sentence will not prohibit (a) distributions payable solely in Junior Units, (b)
the exchange of Junior Units or Parity Preferred Units into Partnership
Interests of the Partnership ranking junior to the Series G Preferred Units as
to distributions and upon voluntary and involuntary liquidation, dissolution or
winding up of the Partnership, or (c) distributions necessary to enable the
Operating Partnership to redeem partnership interests corresponding to Series G
Preferred Shares and any Parity Preferred Stock with respect to distributions or
Junior Stock to be purchased by AMB pursuant to the REIT Charter to preserve
AMB's status as a REIT; provided that such redemption shall be upon the same
terms as the corresponding stock purchase pursuant to the REIT Charter.

                  (ii) So long as distributions have not been paid in full (or a
sum sufficient for such full payment is not so set apart) upon the Series G
Preferred Units and any other Parity Preferred Units, all distributions
authorized and declared on the Series G Preferred Units and all classes or
series of outstanding Parity Preferred Units shall be authorized and declared
pro rata so that the amount of distributions authorized and declared per Series
G Preferred Unit and such other classes or series of Parity Preferred Units
shall in all cases bear to each other the same ratio that accrued distributions
per Series G Preferred Unit and such other classes or series of Parity Preferred
Units (which shall not include any accumulation in respect of unpaid
distributions for prior distribution periods if such class or series of Parity
Preferred Units do not have cumulative distribution rights) bear to each other.
No interest, or sum of money in lieu of interest, shall be payable in respect of
any distributions or payments on Series G Preferred Units which may be in
arrears.

                  (iii) Notwithstanding anything to the contrary set forth
herein, distributions on Partnership Interests held by either (a) the General
Partner, (b) the Operating Partnership or (c) any other holder of Partnership
Interests in the Partnership, in each case ranking junior to or on parity with
the Series G Preferred Units may be made, without preserving the priority of
distributions described in Sections 20.3.C(i) and (ii), but only to the extent
such distributions are required to preserve the REIT status of AMB, in its
capacity as sole general partner of the Operating Partnership and as sole
stockholder of the General Partner, and in the case of any holder other than the
General Partner only to the extent required by the Partnership Agreement;
provided, that the Partnership shall not be disproportionately burdened by this
provision relative to the cash flow generated by other assets owned directly or
indirectly by AMB.

                  D. No Further Rights. Holders of Series G Preferred Units
shall not be entitled to any distributions, whether payable in cash, other
property or otherwise, in excess of the full cumulative distributions described
herein.

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                  Section 20.4. Liquidation Proceeds

                  A. Distributions. Upon voluntary or involuntary liquidation,
dissolution or winding-up of the Partnership, distributions on the Series G
Preferred Units shall be made in accordance with Article 13 of this Agreement.

                  B. Notice. Written notice of any such voluntary or involuntary
liquidation, dissolution or winding-up of the Partnership, stating the payment
date or dates when, and the place or places where, the amounts distributable in
such circumstances shall be payable, shall be given by the General Partner
pursuant to Section 13.6 hereof.

                  C. No Further Rights. After payment of the full amount of the
liquidating distributions to which they are entitled, Holders of Series G
Preferred Units will have no right or claim to any of the remaining assets of
the Partnership.

                  D. Consolidation, Merger or Certain Other Transactions. None
of a consolidation or merger of the Partnership with or into another entity, a
merger of another entity with or into the Partnership, or a sale, lease,
transfer or conveyance of all or substantially all of the Partnership's property
or business shall be considered a liquidation, dissolution or winding up of the
Partnership.

                  Section 20.5. Series G Redemption

                  A. Series G Redemption. The Series G Preferred Units may not
be redeemed prior to September 1, 2005. On or after such date, the Partnership
shall have the right to redeem the Series G Preferred Units, in whole or in
part, at any time or from time to time, upon not less than 30 nor more than 60
days' written notice, at a redemption price, payable in cash (a "Series G
Redemption"), equal to the Capital Account balance of the holder of Series G
Preferred Units (the "Series G Redemption Price"); provided, however, that no
redemption pursuant to this Section 20.5 will be permitted if the Series G
Redemption Price does not equal or exceed the original Capital Contribution of
such holder plus the cumulative Series G Priority Return to the redemption date
to the extent not previously distributed. If fewer than all of the outstanding
Series G Preferred Units are to be redeemed, the Series G Preferred Units to be
redeemed shall be selected pro rata (as nearly as practicable without creating
fractional units).

                  B. Limitation on Series G Redemption. (i) The Series G
Redemption Price of the Series G Preferred Units (other than the portion thereof
consisting of accumulated but unpaid distributions) is payable solely out of the
sale proceeds of capital stock of AMB, which will be contributed by AMB to the
General Partner or the Operating Partnership and which in turn will be
contributed by the General Partner or the Operating Partnership to the
Partnership as an additional capital contribution, or out of the sale of limited
partner interests in the Partnership or the Operating Partnership and from no
other source. For purposes of the preceding sentence, "capital stock" means any
equity securities (including Common Stock and Preferred Stock (as such terms are
defined in the REIT Charter), depository shares, interests, participation or
other ownership interests (however designated) and any rights (other than debt
securities convertible into or exchangeable for equity securities) or options to
purchase any of the foregoing.

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                  (ii) The Partnership may not redeem fewer than all of the
outstanding Series G Preferred Units unless all accumulated and unpaid
distributions have been paid on all Series G Preferred Units for all quarterly
distribution periods terminating on or prior to the date of redemption.

                  C. Procedures for Series G Redemption. (i) Notice of
redemption will be (i) faxed, and (ii) mailed by the Partnership, by certified
mail, postage prepaid, not less than 30 nor more than 60 days prior to the
redemption date, addressed to the respective holders of record of the Series G
Preferred Units at their respective addresses as they appear on the records of
the Partnership. No failure to give or defect in such notice shall affect the
validity of the proceedings for the redemption of any Series G Preferred Units
except as to the holder to whom such notice was defective or not given. In
addition to any information required by law, each such notice shall state: (a)
the redemption date, (b) the Series G Redemption Price, (c) the aggregate number
of Series G Preferred Units to be redeemed and if fewer than all of the
outstanding Series G Preferred Units are to be redeemed, the number of Series G
Preferred Units to be redeemed held by such holder, which number shall equal
such holder's pro rata share (based on the percentage of the aggregate number of
outstanding Series G Preferred Units that the total number of Series G Preferred
Units held by such holder represents) of the aggregate number of Series G
Preferred Units to be redeemed, (d) the place or places where such Series G
Preferred Units are to be surrendered for payment of the Series G Redemption
Price, (e) that distributions on the Series G Preferred Units to be redeemed
will cease to accumulate on such redemption date and (f) that payment of the
Series G Redemption Price will be made upon presentation and surrender of such
Series G Preferred Units.

                  (ii) If the Partnership gives a notice of redemption in
respect of Series G Preferred Units (which notice will be irrevocable) then, by
12:00 noon, New York City time, on the redemption date, the Partnership will
deposit irrevocably in trust for the benefit of the Series G Preferred Units
being redeemed funds sufficient to pay the applicable Series G Redemption Price
and will give irrevocable instructions and authority to pay such Series G
Redemption Price to the holders of the Series G Preferred Units upon surrender
of the Series G Preferred Units by such holders at the place designated in the
notice of redemption. On and after the date of redemption, distributions will
cease to accumulate on the Series G Preferred Units or portions thereof called
for redemption, unless the Partnership defaults in the payment thereof. If any
date fixed for redemption of Series G Preferred Units is not a Business Day,
then payment of the Series G Redemption Price payable on such date will be made
on the next succeeding day that is a Business Day (and without any interest or
other payment in respect of any such delay) except that, if such Business Day
falls in the next calendar year, such payment will be made on the immediately
preceding Business Day, in each case with the same force and effect as if made
on such date fixed for redemption. If payment of the Series G Redemption Price
is improperly withheld or refused and not paid by the Partnership, distributions
on such Series G Preferred Units will continue to accumulate from the original
redemption date to the date of payment, in which case the actual payment date
will be considered the date fixed for redemption for purposes of calculating the
applicable Series G Redemption Price.

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                  Section 20.6. Voting and Certain Management Rights

                  A. General. Holders of the Series G Preferred Units will not
have any voting rights or right to consent to any matter requiring the consent
or approval of the Limited Partners, except as set forth below and in Section
7.3.E.

                  B. Certain Voting Rights. So long as any Series G Preferred
Units remains outstanding, the Partnership shall not, without the affirmative
vote of the holders of at least two-thirds of the Series G Preferred Units
outstanding at the time (i) authorize or create, or increase the authorized or
issued amount of, any class or series of Partnership Interests ranking prior to
the Series G Preferred Units with respect to payment of distributions or rights
upon liquidation, dissolution or winding-up or reclassify any Partnership
Interests of the Partnership into any such Partnership Interest, or create,
authorize or issue any obligations or security convertible into or evidencing
the right to purchase any such Partnership Interests, (ii) authorize or create,
or increase the authorized or issued amount of any Parity Preferred Units or
reclassify any Partnership Interest of the Partnership into any such Partnership
Interest or create, authorize or issue any obligations or security convertible
into or evidencing the right to purchase any such Partnership Interests but only
to the extent such Parity Preferred Units are issued to an affiliate of the
Partnership, other than AMB or the Operating Partnership to the extent the
issuance of such interests was to allow AMB or the Operating Partnership to
issue corresponding preferred stock or preferred interests to persons who are
not affiliates of the Partnership (other than AMB to the extent AMB issues
corresponding preferred stock to persons who are not affiliates of the
Partnership or the Operating Partnership) or (iii) either consolidate, merge
into or with, or convey, transfer or lease its assets substantially as an
entirety to, any corporation or other entity or amend, alter or repeal the
provisions of the Partnership Agreement (including, without limitation, this
Article 20 and Section 11.2), whether by merger, consolidation or otherwise, in
each case in a manner that would materially and adversely affect the powers,
special rights, preferences, privileges or voting power of the Series G
Preferred Units or the holders thereof; provided, however, that with respect to
the occurrence of any event set forth in (iii) above, so long as (a) the
Partnership is the surviving entity and the Series G Preferred Units remain
outstanding with the terms thereof unchanged, or (b) the resulting, surviving or
transferee entity is a partnership, limited liability company or other
pass-through entity organized under the laws of any state and substitutes the
Series G Preferred Units for other interests in such entity having substantially
the same terms and rights as the Series G Preferred Units, including with
respect to distributions, voting rights and rights upon liquidation, dissolution
or winding-up, then the occurrence of any such event shall not be deemed to
materially and adversely affect such rights, privileges or voting powers of the
holders of the Series G Preferred Units; and provided further, that any increase
in the amount of Partnership Interests or the creation or issuance of any other
class or series of Partnership Interests represented by Junior Units or Parity
Preferred Units that are not issued to an affiliate of the Partnership, other
than the General Partner or the Operating Partnership to the extent the issuance
of such interests was to allow the General Partner or the Operating Partnership
to issue corresponding preferred stock or preferred interests to persons who are
not affiliates of the Partnership (other than AMB to the extent AMB issues
corresponding preferred stock or preferred interests to persons who are not
affiliates of the Partnership or the Operating Partnership), shall not be deemed
to materially and adversely affect such rights, preferences, privileges or
voting powers.

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                  C. So long as any Series G Preferred Units remain outstanding,
the General Partner shall not, without the affirmative vote of the holders of at
least two-thirds of the Series G Preferred Units outstanding at the time, take
any action which would result in the termination of the right of the holders of
such units to effect an exchange pursuant to Section 20.8; provided however, no
such vote shall be required so long as the Series G Preferred Units (or any
interests substituted therefore pursuant to Section 20.6.B) remain outstanding
and are exchangeable for Series G Preferred Shares or stock in another entity
having substantially the same terms and rights as the Series G Preferred Shares.

                  D. Notwithstanding anything to the contrary contained in this
Agreement, including, without limitation, the provisions of Article 7 regarding
the management rights and responsibilities of the General Partner, whenever
distributions on any Series G Preferred Units shall remain unpaid for six or
more quarterly periods (i.e., the quarterly periods ending on the 15th day of
each January, April, July and October, or, if not a business day, the next
succeeding business day, beginning with the quarterly period ending October 15,
2000) (whether or not consecutive), the holders of 51% of either (i) such Series
G Preferred Units, in the event that the holders of the Series D Preferred
Units, Series E Preferred Units, Series F Preferred Units, Series H Preferred
Units and Series I Preferred Units are not entitled to exercise management
rights pursuant to Section 17.6D, Section 18.6.D, Section 19.6.D, Section 21.6.D
and Section 22.6.D, respectively, and that no Future Parity Preferred
Unitholders are entitled to exercise management rights similar to those to which
the holders of Series D Preferred Units, Series E Preferred Units, Series F
Preferred Units, Series G Preferred Units, Series H Preferred Units and Series I
Preferred Units, are entitled to exercise pursuant to Section 17.6D, Section
18.6.D, Section 19.6.D, Section 20.6.D, Section 21.6.D and Section 22.6.D,
respectively, or (ii) the Parity Preferred Capital, in the event that holders of
Series D Preferred Units, Series E Preferred Units, Series F Preferred Units,
Series H Preferred Units and Series I Preferred Units are entitled to exercise
management rights pursuant to Section 17.6D, Section 18.6.D, Section 19.6.D,
Series 21.6.D and Section 22.6.D, respectively, or Future Parity Preferred
Unitholders are entitled to exercise management rights similar to those to which
the holders of Series D Preferred Units, Series E Preferred Units, Series F
Preferred Units, Series G Preferred Units, Series H Preferred Units and Series I
Preferred Units are entitled to exercise pursuant to Section 17.6D, Section
18.6.D, Section 19.6.D, this Section 20.6.D, Section 21.6.D, and Section 22.6.D,
respectively, shall be entitled to assume rights to manage the Partnership and
perform actions related thereto for the sole purpose of enforcing the
Partnership's rights and remedies as against obligees of the Partnership or
other Persons from whom the Partnership may be entitled to receive cash or other
assets, until all distributions accumulated on the Series G Preferred Units for
all past quarterly periods and the distribution for the then-current quarterly
period shall have been fully-paid or declared and a sum sufficient for the
payment thereof irrevocably set aside in trust for payment in full; provided,
however, that no such holder or holders of Series G Preferred Units may at any
time take any action (or fail to take any action) if the consequence of such
action (or inaction) would be (i) to cause AMB to fail to qualify as a REIT for
federal or applicable state income tax purposes or (ii) to cause the Partnership
or the Operating Partnership to fail to qualify as a partnership for federal or
applicable state income tax purposes, or (iii) to cause the Partnership, the
Operating Partnership, the General Partner, or AMB to be considered an
"investment company" as defined in, or otherwise be subject to regulation under,
the Investment Company Act of 1940, as amended; and provided, further, that
solely for purposes of exercising the

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management rights set forth in this Section 20.6.D, each holder of Series G
Preferred Units shall be deemed an Indemnitee, and shall be entitled to the
benefits of the indemnification provisions of Section 7.7 with respect to any
and all action(s) taken (or failure(s) to act) by a holder of Series G Preferred
Units in the exercise of (or failure(s) to exercise) the management rights
described in this Section 20.6.D, including, without limitation, alleged
breaches of the General Partner's fiduciary duty to the Partners; and provided
further, that the holders of the Series G Preferred Units acknowledge and agree
that the General Partner and the Partnership have provided similar management
rights to the holders of the Series D Preferred Units, the Series E Preferred
Units and the Series F Preferred Units and shall be entitled to provide similar
management rights to Future Parity Preferred Unitholders.

                  Section 20.7. Transfer Restrictions

                  The Series G Preferred Units shall be subject to the
provisions of Article 11 hereof. Notwithstanding any provision to the contrary
herein, no transfer of Series G Preferred Units, or other action by the holder
or holders of such Units, is permitted without the consent of the General
Partner which consent may be given or withheld in its sole and absolute
discretion, if such transfer or other action would result in more than four
partners holding all outstanding Series F Preferred Units and Series G Preferred
Units within the meaning of Treasury Regulation Section 1.7704-1(h)(1)(ii)
(without regard to Treasury Regulation Section 1.7704-1(h)(3)(ii)); provided,
however, that the General Partner's consent may not be unreasonably withheld if
(a) such transfer or other action would not result in more than ten partners
holding all outstanding Series F Preferred Units and Series G Preferred Units
within the meaning of Treasury Regulation Section 1.7704-1(h)(1)(ii) (without
regard to Treasury Regulation Section 1.7704-1(h)(3)(ii)) and (b) the General
Partner cannot rely on Treasury Regulation Section 1.7704-1(h). In addition, no
transfer may be made to any person if such transfer would cause the exchange of
the Series G Preferred Units for Series G Preferred Shares, as provided herein,
to be required to be registered under the Securities Act of 1933, as amended, or
any state securities laws.

                  Section 20.8. Exchange Rights

                  A. Right to Exchange. (i) Series G Preferred Units will be
exchangeable in whole but not in part unless expressly otherwise provided herein
at anytime on or after August 29, 2010, at the option of 51% of the holders of
all outstanding Series G Preferred Units, for authorized but previously unissued
Series G Preferred Shares at an exchange rate of one Series G Preferred Share
from AMB for one Series G Preferred Unit, subject to adjustment as described
below (the "Series G Exchange Price"); provided that the Series G Preferred
Units will become exchangeable at any time, in whole but not in part unless
expressly otherwise provided herein, at the option of 51% of the holders of all
outstanding Series G Preferred Units for Series G Preferred Shares if (y) at any
time full distributions shall not have been timely made on any Series G
Preferred Unit with respect to six (6) prior quarterly distribution periods,
whether or not consecutive; provided, however, that a distribution in respect of
Series G Preferred Units shall be considered timely made if made within two (2)
Business Days after the applicable Series G Preferred Unit Distribution Payment
Date if at the time of such late payment there shall not be any prior quarterly
distribution periods in respect of which full distributions were not timely made
or (z) upon receipt by a holder or holders of Series G Preferred Units of (A)
notice from the

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General Partner that the General Partner or a Subsidiary of the General Partner
has taken the position that the Partnership is, or upon the consummation of an
identified event in the immediate future will be, a PTP and (B) an opinion
rendered by independent counsel familiar with such matters addressed to a holder
or holders of Series G Preferred Units, that the Partnership is or likely is, or
upon the occurrence of a defined event in the immediate future will be or likely
will be, a PTP.

                  In addition, the Series G Preferred Units may be exchanged for
Series G Preferred Shares, in whole but not in part unless expressly otherwise
provided herein, at the option of 51% of the holders of all outstanding Series G
Preferred Units after August 29, 2003 and prior to August 29, 2010 if such
holders of a Series G Preferred Units shall deliver to the General Partner
either (i) a private letter ruling addressed to such holder of Series G
Preferred Units or (ii) an opinion of independent counsel reasonably acceptable
to the General Partner based on a change in statute, the enactment of temporary
or final Treasury Regulations or the publication of a Revenue Ruling or any
other IRS release, in either case to the effect that an exchange of the Series G
Preferred Units at such earlier time would not cause the Series G Preferred
Units to be considered "stock and securities" within the meaning of Section
351(e) of the Code for purposes of determining whether the holder of such Series
G Preferred Units is an "investment company" under Section 721(b) of the Code if
an exchange is permitted at such earlier date.

                  In addition, Series G Preferred Units will become exchangeable
in whole but not in part unless expressly otherwise provided herein, at the
option of 51% of the holders of all outstanding Series G Preferred Units for
Series G Preferred Shares at an exchange rate of one Series G Preferred Share
from AMB for one Series G Preferred Unit if, (i) at any time such holders
conclude based on results or projected results that there exists (in the
reasonable judgment of such holders) an imminent and substantial risk that such
holders' interest in the Partnership represents or will represent more than
19.0% of the total profits of or capital interests in the Partnership for a
taxable year, (ii) such holders deliver to the General Partner an opinion of
independent counsel, reasonably acceptable to the General Partner to the effect
that there is a substantial risk that their interest in the Partnership does not
or will not satisfy the 19.0% limit and (iii) the General Partner agrees with
the conclusions referred to in clauses (i) and (ii) of this sentence, such
agreement not to be unreasonably withheld.

                  Furthermore, Series G Preferred Units will become exchangeable
in whole but not in part unless expressly otherwise provided herein, at the
option of 51% of the holders of all outstanding Series G Preferred Units for
Series G Preferred Shares at an exchange rate of one Series G Preferred Share
from AMB for one Series G Preferred Unit if (i) the Series G Preferred Units are
held by a REIT and (ii) excluding the effect of any loans and advances, from
time to time, from the Partnership to the Operating Partnership or any other
affiliate or related entity not exceeding 15% of the Partnership's total assets,
for purposes of the 5% test of Section 856(c)(4)(B) of the Code, either (A) the
Partnership is advised by independent counsel that, based on the assets and
income of the Partnership for a taxable year after 1999, the Partnership would
not satisfy the income and assets tests of Section 856 of the Code for such
taxable year if the Partnership were a real estate investment trust within the
meaning of the Code; or (B) the holder of the Series G Preferred Units shall
deliver to the General Partner an opinion of independent counsel reasonably
acceptable to the General Partner to the effect that, based on the

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assets and income of the Partnership for a taxable year after 1999, the
Partnership would not satisfy the income and assets tests of Section 856 of the
Code for such taxable year if the Partnership were a real estate investment
trust within the meaning of the Code and that such failure would create a
meaningful risk that the holder of the Series G Preferred Units would fail to
maintain its qualification as a real estate investment trust.

                  (ii) Notwithstanding anything to the contrary set forth in
Section 20.8.A(i), if a Series G Exchange Notice (as defined herein) has been
delivered to AMB and the General Partner, then the General Partner may, at its
option, within ten (10) Business Days after receipt of the Series G Exchange
Notice, elect to cause the Partnership to redeem all or a portion of the
outstanding Series G Preferred Units for cash in an amount equal to the original
Capital Contribution per Series G Preferred Unit and all accrued and unpaid
distributions thereon to the date of redemption. If the General Partner elects
to redeem fewer than all of the outstanding Series G Preferred Units, the number
of Series G Preferred Units held by each holder to be redeemed shall equal such
holder's pro rata share (based on the percentage of the aggregate number of
outstanding Series G Preferred Units that the total number of Series G Preferred
Units held by such holder represents) of the aggregate number of Series G
Preferred Units being redeemed.

                  (iii) In the event an exchange of all Series G Preferred Units
pursuant to Section 20.8.A would violate the provisions on ownership limitation
of AMB set forth in Section 7 of Article Third of the Series G Articles
Supplementary, each holder of Series G Preferred Units shall be entitled to
exchange, pursuant to the provisions of Section 20.8.B, a number of Series G
Preferred Units which would comply with the provisions on the ownership
limitation of AMB set forth in such Section 7 of Article Third of the Series G
Articles Supplementary, with respect to such holder, and any Series G Preferred
Units not so exchanged (the "Series G Excess Units") shall be redeemed by the
Partnership for cash in an amount equal to the original Capital Contribution per
Series G Excess Unit, plus any accrued and unpaid distributions thereon to the
date of redemption subject to any restriction thereon contained in any debt
instrument or agreement of the Partnership. In the event an exchange would
result in Series G Excess Units, as a condition to such exchange, each holder of
such units agrees to provide representations and covenants reasonably requested
by AMB relating to (i) the widely held nature of the interests in such holder,
sufficient to assure AMB that the holder's ownership of stock of AMB (without
regard to the limits described above) will not cause any individual to own in
excess of 9.0% of the stock of AMB; and (ii) to the extent such Holder can so
represent and covenant without obtaining information from its owners (other than
one or more direct or indirect parent corporations, limited liability companies
or partnerships and not the holders of any interests in any such parent), the
Holder's ownership of tenants of the Partnership and its affiliates. For
purposes of determining the number of Series G Excess Units under this Section
20.8.A(iii), the "Ownership Limit" set forth in the Series G Articles
Supplementary shall be deemed to be 9.0%. To the extent the Partnership would
not be able to pay the cash set forth above in exchange for the Series G Excess
Units, and to the extent consistent with the REIT Charter, AMB agrees that it
will grant to the holders of the Series G Preferred Units exceptions to the
Ownership Limit set forth in the Series G Articles Supplementary sufficient to
allow such Holders to exchange all of their Series G Preferred Units for Series
G Preferred Shares; provided such holders furnish to AMB representations
acceptable to AMB in its sole and absolute discretion which assure AMB

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that such exceptions will not jeopardize AMB's tax status as a REIT for purposes
of federal and applicable state law. Notwithstanding any provision of this
Agreement to the contrary, no Series G Limited Partner shall be entitled to
effect an exchange of Series G Preferred Units for Series G Preferred Shares to
the extent that ownership or right to acquire such shares would cause the
Partner or any other Person or, in the opinion of counsel selected by AMB, may
cause the Partner or any other Person, to violate the restrictions on ownership
and transfer of Series G Preferred Shares set forth in the REIT Charter. To the
extent any such attempted exchange for Series G Preferred Shares would be in
violation of the previous sentence, it shall be void ab initio and such Series G
Limited Partner shall not acquire any rights or economic interest in the Series
G Preferred Shares otherwise issuable upon such exchange.

                  (iv) The redemption of Series G Preferred Units described in
Section 20.8.A(ii) and (iii) shall be subject to the provisions of Section
20.5.B(i) and Section 20.5.C(ii); provided, however, that the term "Series G
Redemption Price" in such Sections 20.5.B(i) and 20.5.C(ii) shall be read to
mean the original Capital Contribution per Series G Preferred Unit being
redeemed as set forth on Exhibit A plus all accrued and unpaid distributions to
the redemption date.

                  B. Procedure for Exchange of Series G Preferred Units and/or
Series G Redemption.

                  (i) Any exchange shall be exercised pursuant to a notice of
exchange (the "Series G Exchange Notice") delivered to AMB and the General
Partner by the Partners representing at least 51% of the outstanding Series G
Preferred Units (or by the Series G Contributor in the case of an exchange
pursuant to the last sentence of Section 20.8.A.(i) hereof) by (a) fax and (b)
by certified mail postage prepaid. AMB may effect any exchange of Series G
Preferred Units, or the General Partner may exercise its option to cause the
Partnership to redeem any portion of the Series G Preferred Units for cash
pursuant to Section 20.8.A(ii) or redeem Series G Excess Units pursuant to
Section 20.8.A(iii), by delivering to each holder of record of Series G
Preferred Units, within ten (10) Business Days following receipt of the Series G
Exchange Notice, (a) if the General Partner elects to cause the Partnership to
acquire any of the Series G Preferred Units then outstanding, (1) certificates
representing the Series G Preferred Shares being issued in exchange for the
Series G Preferred Units of such holder being exchanged and (2) a written notice
(a "Series G Redemption Notice") stating (A) the redemption date, which may be
the date of such Series G Redemption Notice or any other date which is not later
than sixty (60) days following the receipt of the Series G Exchange Notice, (B)
the redemption price, (C) the place or places where the Series G Preferred Units
are to be surrendered and (D) that distributions on the Series G Preferred Units
will cease to accrue on such redemption date, or (b) if the General Partner
elects to cause the Partnership to redeem all of the Series G Preferred Units
then outstanding in exchange for cash, a Series G Redemption Notice. Series G
Preferred Units which are redeemed shall be deemed canceled (and any
corresponding Partnership Interest represented thereby deemed terminated) on the
redemption date. Holders of Series G Preferred Units shall deliver any canceled
certificates representing Series G Preferred Units which have been exchanged or
redeemed to the office of the General Partner (which currently is located at
Pier 1, Bay 1, San Francisco, California 94111) within ten (10) Business Days of
the exchange or redemption with respect thereto. Notwithstanding anything to the
contrary contained herein, any

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and all Series G Preferred Units to be exchanged for Series G Preferred Shares
pursuant to this Section 20.8 shall be so exchanged in a single transaction at
one time. As a condition to exchange, AMB may require the holders of Series G
Preferred Units to make such representations as may be reasonably necessary for
the General Partner to establish that the issuance of Series G Preferred Shares
pursuant to the exchange shall not be required to be registered under the
Securities Act or any state securities laws. Any Series G Preferred Shares
issued pursuant to this Section 20.8 shall be delivered as shares which are duly
authorized, validly issued, fully paid and nonassessable, free of any pledge,
lien, encumbrance or restriction other than those provided in the REIT Charter,
the Bylaws of AMB, the Securities Act and relevant state securities or blue sky
laws.

                  The certificates representing the Series G Preferred Shares
issued upon exchange of the Series G Preferred Units shall contain the following
legend:

                  THE SHARES REPRESENTED BY THIS CERTIFICATE MAY NOT BE
                  TRANSFERRED, SOLD, ASSIGNED, PLEDGED, HYPOTHECATED OR
                  OTHERWISE DISPOSED OF EXCEPT (A) PURSUANT TO AN EFFECTIVE
                  REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933, AS
                  AMENDED (THE "ACT"), AND STATE SECURITIES LAWS OR (B) IF THE
                  CORPORATION HAS BEEN FURNISHED WITH A SATISFACTORY OPINION OF
                  COUNSEL FOR THE HOLDER OF THE SHARES REPRESENTED HEREBY, OR
                  OTHER EVIDENCE SATISFACTORY TO THE CORPORATION, THAT SUCH
                  TRANSFER, SALE, ASSIGNMENT, PLEDGE, HYPOTHECATION OR OTHER
                  DISPOSITION IS EXEMPT FROM THE PROVISIONS OF SECTION 5 OF THE
                  ACT AND STATE SECURITIES LAWS AND THE RULES AND REGULATIONS
                  THEREUNDER.

                  (ii) In the event of an exchange of Series G Preferred Units
for Series G Preferred Shares, an amount equal to the accrued and unpaid
distributions to the date of exchange on any Series G Preferred Units tendered
for exchange shall (i) accrue on the Series G Preferred Shares into which such
Series G Preferred Units are exchanged, and (ii) continue to accrue on such
Series G Preferred Units, which shall remain outstanding following such
exchange, with the General Partner as the holder of such Series G Preferred
Units. Notwithstanding anything to the contrary set forth herein, in no event
shall a Holder of a Series G Preferred Unit that was validly exchanged for
Series G Preferred Shares pursuant to this Section (other than the General
Partner holding such Series G Preferred Unit following any such exchange),
receive a distribution out of Available Cash of the Partnership, if such Holder,
after exchange, is entitled to receive a distribution with respect to the Series
G Preferred Shares for which such Series G Preferred Unit was exchanged or
redeemed. Further, for purposes of the foregoing, in the event of an exchange of
Series G Preferred Units for Series G Preferred Shares, if the accrued and
unpaid distributions per Series G Preferred Unit is not the same for each Series
G Preferred Unit, the accrued and unpaid distributions per Series G Preferred
Unit for each such Series G Preferred Unit shall be

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equal to the greatest amount of such accrued and unpaid distributions per Series
G Preferred Unit on any such unit.

                  (iii) Fractional Series G Preferred Shares are not to be
issued upon exchange but, in lieu thereof, the General Partner will pay a cash
adjustment based upon the fair market value of the Series G Preferred Shares on
the day prior to the exchange date as determined in good faith by the board of
directors of the General Partner.

                  C. Adjustment of Series G Exchange Price. In case AMB shall be
a party to any transaction (including, without limitation, a merger,
consolidation, statutory share exchange, tender offer for all or substantially
all of AMB's capital stock or sale of all or substantially all of AMB's assets),
in each case as a result of which the Series G Preferred Shares will be
converted into the right to receive shares of capital stock, other securities or
other property (including cash or any combination thereof), each Series G
Preferred Unit will thereafter be exchangeable into the kind and amount of
shares of capital stock and other securities and property receivable (including
cash or any combination thereof) upon the consummation of such transaction by a
holder of that number of Series G Preferred Shares or fraction thereof into
which one Series G Preferred Unit was exchangeable immediately prior to such
transaction. AMB may not become a party to any such transaction unless the terms
thereof are consistent with the foregoing. AMB and the Operating Partnership
further agree that, notwithstanding any transaction to which either may be a
party (including, without limitation, any merger, consolidation, statutory share
exchange, tender offer for all or substantially all of such entity's capital
stock or partnership interests or sale of all or substantially all of such
entity's assets), immediately following any such transaction, the issuer or
issuers of any shares of capital stock and other securities into which the
Series G Preferred Units shall be exchangeable pursuant to this Section 20.8
shall be the same issuer or issuers of shares of capital stock and other
securities into which (i) the Series B Preferred Units are then exchangeable
(or, if the Series B Preferred Units have previously been redeemed in full,
would have been then exchangeable if then still outstanding), (ii) the Series C
Preferred Units are then exchangeable (or, if the Series C Preferred Units have
previously been redeemed in full, would have been then exchangeable if then
still outstanding), (iii) the Series D Preferred Units are then exchangeable
(or, if the Series D Preferred Units have previously been redeemed in full,
would have been then exchangeable if then still outstanding), (iv) the Series E
Preferred Units are then exchangeable (or, if the Series E Preferred Units have
previously been redeemed in full, would have been then exchangeable if then
still outstanding) and (v) the Series F Preferred Units are then exchangeable
(or, if the Series F Preferred Units have previously been redeemed in full,
would have been then exchangeable if then still outstanding).

                  Section 20.9. No Conversion Rights

                  The Series G Preferred Units shall not be convertible into any
other class or series of interest in the Partnership.

                  Section 20.10. No Sinking Fund

                  No sinking fund shall be established for the retirement or
redemption of Series G Preferred Units.

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                                   ARTICLE 21.
                            SERIES H PREFERRED UNITS

                  Section 21.1. Designation and Number

                  A series of Partnership Units in the Partnership designated as
the 8.125% Series H Cumulative Redeemable Preferred Units (the "Series H
Preferred Units") is hereby established. The number of Series H Preferred Units
shall be 840,000.

                  Section 21.2. Ranking

                  The Series H Preferred Units shall, with respect to
distribution rights and rights upon voluntary or involuntary liquidation,
winding up or dissolution of the Partnership, rank (i) senior to the Common
Units and to all Partnership Units the terms of which provide that such
Partnership Units shall rank junior to the Series H Preferred Units; (ii) on a
parity with the Series C Preferred Units, the Series D Preferred Units, the
Series E Preferred Units, the Series F Preferred Units, the Series G Preferred
Units, and all other Parity Preferred Units; and (iii) junior to all Partnership
Units which rank senior to the Series H Preferred Units.

                  Section 21.3. Distributions

                  A. Payment of Distributions. Subject to the rights of holders
of Parity Preferred Units as to the payment of distributions (including pursuant
to Sections 5.1, 16.3.A, 17.3A, 18.3A, 19.3A, 20.3A and 22.3A hereof), holders
of Series H Preferred Units will be entitled to receive, when, as and if
declared by the Partnership acting through the General Partner, out of Available
Cash, cumulative preferential cash distributions in an amount equal to the
Series H Priority Return. Such distributions will be payable (A) quarterly (such
quarterly periods for purposes of payment and accrual will be the quarterly
periods ending on the dates specified in this sentence and not calendar year
quarters) in arrears, on the 25th day of March, June, September and December of
each year and (B) in the event of (i) an exchange of Series H Preferred Units
into Series H Preferred Shares, or (ii) a redemption of Series H Preferred
Units, on the exchange date or redemption date, as applicable (each a "Series H
Preferred Unit Distribution Payment Date"), commencing on the first of such
payment dates to occur following their original date of issuance. If any date on
which distributions are to be made on the Series H Preferred Units is not a
Business Day, then payment of the distribution to be made on such date will be
made on the next succeeding day that is a Business Day (and without any interest
or other payment in respect of any such delay) except that, if such Business Day
is in the next succeeding calendar year, such payment shall be made on the
immediately preceding Business Day, in each case with the same force and effect
as if made on such date. Distributions on the Series H Preferred Units will be
made to the holders of record of the Series H Preferred Units on the relevant
record dates, which will be fifteen (15) days prior to the relevant Series H
Preferred Unit Distribution Payment Date (the "Series H Preferred Unit
Partnership Record Date"). For purposes of clarifying the relative distribution
priority rights among the Series I Preferred Units, Series H Preferred Units,
the Series G Preferred Units, the Series F Preferred Units, the Series E
Preferred Units, the Series D Preferred Units and the Series C Preferred Units,
the payment of distributions with respect to a series of such Preferred Units
prior to the payment of distributions with respect to another such series of
Preferred Units, solely as a result of the distribution

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payment dates with respect to a series of Preferred Units occurring on a
different date from another series of Preferred Units, shall not be deemed to
create a priority in favor of one series of Preferred Units over any other
series of Preferred Units.

                  B. Distributions Cumulative. Notwithstanding the foregoing,
distributions on the Series H Preferred Units will accrue whether or not the
terms and provisions of any agreement of the Partnership at any time prohibit
the current payment of distributions, whether or not the Partnership has
earnings, whether or not there are funds legally available for the payment of
such of such distributions and whether or not such distributions are authorized.
Accrued but unpaid distributions on the Series H Preferred Units will accumulate
as of the Preferred Unit Distribution Payment Date on which they first become
payable.

                  C. Priority as to Distributions. (i) So long as any Series H
Preferred Units are outstanding, no distribution of cash or other property shall
be authorized, declared, paid or set apart for payment on or with respect to any
class or series of Partnership Interest represented by Junior Units, nor shall
any Junior Units or Parity Preferred Units be redeemed, purchased or otherwise
acquired for any consideration (or any monies be paid to or made available for a
sinking fund for the redemption of any such Junior Units or Parity Preferred
Units) by the Partnership (except by conversion into or exchange for other
Junior Units or Parity Preferred Units, as the case may be) unless, in each
case, full cumulative distributions have been or contemporaneously are
authorized and paid or authorized and a sum sufficient for the payment thereof
set apart for such payment on the Series H Preferred Units and all classes and
series of outstanding Parity Preferred Units for all distribution periods. The
foregoing sentence will not prohibit (a) distributions payable solely in Junior
Units, (b) the exchange of Junior Units or Parity Preferred Units into
Partnership Interests of the Partnership ranking junior to the Series H
Preferred Units as to distributions and upon voluntary and involuntary
liquidation, dissolution or winding up of the Partnership, or (c) distributions
necessary to enable the Operating Partnership to redeem partnership interests
corresponding to Series H Preferred Shares and any Parity Preferred Stock with
respect to distributions or Junior Stock to be purchased by AMB pursuant to the
REIT Charter to preserve AMB's status as a REIT; provided that such redemption
shall be upon the same terms as the corresponding stock purchase pursuant to the
REIT Charter.

                  (ii) So long as distributions have not been paid in full (or a
sum sufficient for such full payment is not so set apart) upon the Series H
Preferred Units and any other Parity Preferred Units, all distributions
authorized and declared on the Series H Preferred Units and all classes or
series of outstanding Parity Preferred Units shall be authorized and declared
pro rata so that the amount of distributions authorized and declared per Series
H Preferred Unit and such other classes or series of Parity Preferred Units
shall in all cases bear to each other the same ratio that accrued distributions
per Series H Preferred Unit and such other classes or series of Parity Preferred
Units (which shall not include any accumulation in respect of unpaid
distributions for prior distribution periods if such class or series of Parity
Preferred Units do not have cumulative distribution rights) bear to each other.
No interest, or sum of money in lieu of interest, shall be payable in respect of
any distributions or payments on Series H Preferred Units which may be in
arrears.

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                  (iii) Notwithstanding anything to the contrary set forth
herein, distributions on Partnership Interests held by either (a) the General
Partner, (b) the Operating Partnership or (c) any other holder of Partnership
Interests in the Partnership, in each case ranking junior to or on parity with
the Series H Preferred Units may be made, without preserving the priority of
distributions described in Sections 21.3.C(i) and (ii), but only to the extent
such distributions are required to preserve the REIT status of AMB, in its
capacity as sole general partner of the Operating Partnership and as sole
stockholder of the General Partner, and in the case of any holder other than the
General Partner only to the extent required by the Partnership Agreement;
provided, that the Partnership shall not be disproportionately burdened by this
provision relative to the cash flow generated by other assets owned directly or
indirectly by AMB.

                  D. No Further Rights. Holders of Series H Preferred Units
shall not be entitled to any distributions, whether payable in cash, other
property or otherwise, in excess of the full cumulative distributions described
herein.

                  Section 21.4. Liquidation Proceeds

                  A. Distributions. Upon voluntary or involuntary liquidation,
dissolution or winding-up of the Partnership, distributions on the Series H
Preferred Units shall be made in accordance with Article 13 of this Agreement.

                  B. Notice. Written notice of any such voluntary or involuntary
liquidation, dissolution or winding-up of the Partnership, stating the payment
date or dates when, and the place or places where, the amounts distributable in
such circumstances shall be payable, shall be given by the General Partner
pursuant to Section 13.6 hereof.

                  C. No Further Rights. After payment of the full amount of the
liquidating distributions to which they are entitled, Holders of Series H
Preferred Units will have no right or claim to any of the remaining assets of
the Partnership.

                  D. Consolidation, Merger or Certain Other Transactions. None
of a consolidation or merger of the Partnership with or into another entity, a
merger of another entity with or into the Partnership, or a sale, lease,
transfer or conveyance of all or substantially all of the Partnership's property
or business shall be considered a liquidation, dissolution or winding up of the
Partnership.

                  Section 21.5. Series H Redemption

                  A. Series H Redemption. The Series H Preferred Units may not
be redeemed prior to September 1, 2005. On or after such date, the Partnership
shall have the right to redeem the Series H Preferred Units, in whole or in
part, at any time or from time to time, upon not less than 30 nor more than 60
days' written notice, at a redemption price, payable in cash (a "Series H
Redemption"), equal to the Capital Account balance of the holder of Series H
Preferred Units (the "Series H Redemption Price"); provided, however, that no
redemption pursuant to this Section 21.5 will be permitted if the Series H
Redemption Price does not equal or exceed the original Capital Contribution of
such holder plus the cumulative Series H Priority Return to the redemption date
to the extent not previously distributed. If fewer than all of the outstanding

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Series H Preferred Units are to be redeemed, the Series H Preferred Units to be
redeemed shall be selected pro rata (as nearly as practicable without creating
fractional units).

                  B. Limitation on Series H Redemption. (i) The Series H
Redemption Price of the Series H Preferred Units (other than the portion thereof
consisting of accumulated but unpaid distributions) is payable solely out of the
sale proceeds of capital stock of AMB, which will be contributed by AMB to the
General Partner or the Operating Partnership and which in turn will be
contributed by the General Partner or the Operating Partnership to the
Partnership as an additional capital contribution, or out of the sale of limited
partner interests in the Partnership or the Operating Partnership and from no
other source. For purposes of the preceding sentence, "capital stock" means any
equity securities (including Common Stock and Preferred Stock (as such terms are
defined in the REIT Charter), depository shares, interests, participation or
other ownership interests (however designated) and any rights (other than debt
securities convertible into or exchangeable for equity securities) or options to
purchase any of the foregoing.

                  (ii) The Partnership may not redeem fewer than all of the
outstanding Series H Preferred Units unless all accumulated and unpaid
distributions have been paid on all Series H Preferred Units for all quarterly
distribution periods terminating on or prior to the date of redemption.

                  C. Procedures for Series H Redemption. (i) Notice of
redemption will be (i) faxed, and (ii) mailed by the Partnership, by certified
mail, postage prepaid, not less than 30 nor more than 60 days prior to the
redemption date, addressed to the respective holders of record of the Series H
Preferred Units at their respective addresses as they appear on the records of
the Partnership. No failure to give or defect in such notice shall affect the
validity of the proceedings for the redemption of any Series H Preferred Units
except as to the holder to whom such notice was defective or not given. In
addition to any information required by law, each such notice shall state: (a)
the redemption date, (b) the Series H Redemption Price, (c) the aggregate number
of Series H Preferred Units to be redeemed and if fewer than all of the
outstanding Series H Preferred Units are to be redeemed, the number of Series H
Preferred Units to be redeemed held by such holder, which number shall equal
such holder's pro rata share (based on the percentage of the aggregate number of
outstanding Series H Preferred Units that the total number of Series H Preferred
Units held by such holder represents) of the aggregate number of Series H
Preferred Units to be redeemed, (d) the place or places where such Series H
Preferred Units are to be surrendered for payment of the Series H Redemption
Price, (e) that distributions on the Series H Preferred Units to be redeemed
will cease to accumulate on such redemption date and (f) that payment of the
Series H Redemption Price will be made upon presentation and surrender of such
Series H Preferred Units.

                  (ii) If the Partnership gives a notice of redemption in
respect of Series H Preferred Units (which notice will be irrevocable) then, by
12:00 noon, New York City time, on the redemption date, the Partnership will
deposit irrevocably in trust for the benefit of the Series H Preferred Units
being redeemed funds sufficient to pay the applicable Series H Redemption Price
and will give irrevocable instructions and authority to pay such Series H
Redemption Price to the holders of the Series H Preferred Units upon surrender
of the Series H Preferred Units by such holders at the place designated in the
notice of redemption. On and after the date of

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redemption, distributions will cease to accumulate on the Series H Preferred
Units or portions thereof called for redemption, unless the Partnership defaults
in the payment thereof. If any date fixed for redemption of Series H Preferred
Units is not a Business Day, then payment of the Series H Redemption Price
payable on such date will be made on the next succeeding day that is a Business
Day (and without any interest or other payment in respect of any such delay)
except that, if such Business Day falls in the next calendar year, such payment
will be made on the immediately preceding Business Day, in each case with the
same force and effect as if made on such date fixed for redemption. If payment
of the Series H Redemption Price is improperly withheld or refused and not paid
by the Partnership, distributions on such Series H Preferred Units will continue
to accumulate from the original redemption date to the date of payment, in which
case the actual payment date will be considered the date fixed for redemption
for purposes of calculating the applicable Series H Redemption Price.

                  Section 21.6. Voting and Certain Management Rights

                  A. General. Holders of the Series H Preferred Units will not
have any voting rights or right to consent to any matter requiring the consent
or approval of the Limited Partners, except as set forth below and in Section
7.3.E.

                  B. Certain Voting Rights. So long as any Series H Preferred
Units remains outstanding, the Partnership shall not, without the affirmative
vote of the holders of at least two-thirds of the Series H Preferred Units
outstanding at the time (i) authorize or create, or increase the authorized or
issued amount of, any class or series of Partnership Interests ranking prior to
the Series H Preferred Units with respect to payment of distributions or rights
upon liquidation, dissolution or winding-up or reclassify any Partnership
Interests of the Partnership into any such Partnership Interest, or create,
authorize or issue any obligations or security convertible into or evidencing
the right to purchase any such Partnership Interests, (ii) authorize or create,
or increase the authorized or issued amount of any Parity Preferred Units or
reclassify any Partnership Interest of the Partnership into any such Partnership
Interest or create, authorize or issue any obligations or security convertible
into or evidencing the right to purchase any such Partnership Interests but only
to the extent such Parity Preferred Units are issued to an affiliate of the
Partnership, other than AMB or the Operating Partnership to the extent the
issuance of such interests was to allow AMB or the Operating Partnership to
issue corresponding preferred stock or preferred interests to persons who are
not affiliates of the Partnership (other than AMB to the extent AMB issues
corresponding preferred stock to persons who are not affiliates of the
Partnership or the Operating Partnership) or (iii) either consolidate, merge
into or with, or convey, transfer or lease its assets substantially as an
entirety to, any corporation or other entity or amend, alter or repeal the
provisions of the Partnership Agreement (including, without limitation, this
Article 21 and Section 11.2), whether by merger, consolidation or otherwise, in
each case in a manner that would materially and adversely affect the powers,
special rights, preferences, privileges or voting power of the Series H
Preferred Units or the holders thereof; provided, however, that with respect to
the occurrence of any event set forth in (iii) above, so long as (a) the
Partnership is the surviving entity and the Series H Preferred Units remain
outstanding with the terms thereof unchanged, or (b) the resulting, surviving or
transferee entity is a partnership, limited liability company or other
pass-through entity organized under the laws of any state and substitutes the
Series H Preferred Units for other interests in such entity having

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substantially the same terms and rights as the Series H Preferred Units,
including with respect to distributions, voting rights and rights upon
liquidation, dissolution or winding-up, then the occurrence of any such event
shall not be deemed to materially and adversely affect such rights, privileges
or voting powers of the holders of the Series H Preferred Units; and provided
further, that any increase in the amount of Partnership Interests or the
creation or issuance of any other class or series of Partnership Interests
represented by Junior Units or Parity Preferred Units that are not issued to an
affiliate of the Partnership, other than the General Partner or the Operating
Partnership to the extent the issuance of such interests was to allow the
General Partner or the Operating Partnership to issue corresponding preferred
stock or preferred interests to persons who are not affiliates of the
Partnership (other than AMB to the extent AMB issues corresponding preferred
stock or preferred interests to persons who are not affiliates of the
Partnership or the Operating Partnership), shall not be deemed to materially and
adversely affect such rights, preferences, privileges or voting powers.

              C. So long as any Series H Preferred Units remain outstanding, the
General Partner shall not, without the affirmative vote of the holders of at
least two-thirds of the Series H Preferred Units outstanding at the time, take
any action which would result in the termination of the right of the holders of
such units to effect an exchange pursuant to Section 21.8; provided however, no
such vote shall be required so long as the Series H Preferred Units (or any
interests substituted therefore pursuant to Section 21.6.B) remain outstanding
and are exchangeable for Series H Preferred Shares or stock in another entity
having substantially the same terms and rights as the Series H Preferred Shares.

              D. Notwithstanding anything to the contrary contained in this
Agreement, including, without limitation, the provisions of Article 7 regarding
the management rights and responsibilities of the General Partner, whenever
distributions on any Series H Preferred Units shall remain unpaid for six or
more quarterly periods (i.e., the quarterly periods ending on the 25th day of
each March, June, September and December, or, if not a business day, the next
succeeding business day, beginning with the quarterly period ending September
25, 2000) (whether or not consecutive), the holders of 51% of either (i) such
Series H Preferred Units, in the event that the holders of the Series D
Preferred Units, Series E Preferred Units, Series F Preferred Units, Series G
Preferred Units and Series I Preferred Units are not entitled to exercise
management rights pursuant to Section 17.6D, Section 18.6.D,
Section 19.6.D, Section 20.6.D and Section 22.6D, respectively, and that no
Future Parity Preferred Unitholders are entitled to exercise management rights
similar to those to which the holders of Series D Preferred Units, Series E
Preferred Units, Series F Preferred Units, Series G Preferred Units, Series H
Preferred Units and Series I Preferred Units are entitled to exercise pursuant
to Section 17.6D, Section 18.6.D, Section 19.6.D, Section 20.6.D, this Section
21.6.D, and Section 22.6.D, respectively, or (ii) the Parity Preferred Capital,
in the event that holders of Series D Preferred Units, Series E Preferred Units,
Series F Preferred Units or Series G Preferred Units are entitled to exercise
management rights pursuant to Section 17.6D, Section 18.6.D, Section 19.6.D or
Section 20.6.D, respectively, or Future Parity Preferred Unitholders are
entitled to exercise management rights similar to those to which the holders of
Series D Preferred Units, Series E Preferred Units, Series F Preferred Units,
Series G Preferred Units and Series H Preferred Units are entitled to exercise
pursuant to Section 17.6D, Section 18.6.D, Section 19.6.D, this Section 20.6.D,
this Section 21.6.D, or Section 22.6.D, respectively, shall be entitled to
assume rights to manage the

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Partnership and perform actions related thereto for the sole purpose of
enforcing the Partnership's rights and remedies as against obligees of the
Partnership or other Persons from whom the Partnership may be entitled to
receive cash or other assets, until all distributions accumulated on the Series
H Preferred Units for all past quarterly periods and the distribution for the
then-current quarterly period shall have been fully-paid or declared and a sum
sufficient for the payment thereof irrevocably set aside in trust for payment in
full; provided, however, that no such holder or holders of Series H Preferred
Units may at any time take any action (or fail to take any action) if the
consequence of such action (or inaction) would be (i) to cause AMB to fail to
qualify as a REIT for federal or applicable state income tax purposes or (ii) to
cause the Partnership or the Operating Partnership to fail to qualify as a
partnership for federal or applicable state income tax purposes, or (iii) to
cause the Partnership, the Operating Partnership, the General Partner, or AMB to
be considered an "investment company" as defined in, or otherwise be subject to
regulation under, the Investment Company Act of 1940, as amended; and provided,
further, that solely for purposes of exercising the management rights set forth
in this Section 21.6.D, each holder of Series H Preferred Units shall be deemed
an Indemnitee, and shall be entitled to the benefits of the indemnification
provisions of Section 7.7 with respect to any and all action(s) taken (or
failure(s) to act) by a holder of Series H Preferred Units in the exercise of
(or failure(s) to exercise) the management rights described in this Section
21.6.D, including, without limitation, alleged breaches of the General Partner's
fiduciary duty to the Partners; and provided further, that the holders of the
Series H Preferred Units acknowledge and agree that the General Partner and the
Partnership have provided similar management rights to the holders of the Series
D Preferred Units, the Series E Preferred Units, the Series F Preferred Units
and the Series G Preferred Units and shall be entitled to provide similar
management rights to Future Parity Preferred Unitholders.

              Section 21.7. Transfer Restrictions

              The Series H Preferred Units shall be subject to the provisions of
Article 11 hereof. Notwithstanding any provision to the contrary herein, no
transfer of Series H Preferred Units, or other action by the holder or holders
of such Units, is permitted without the consent of the General Partner which
consent may be given or withheld in its sole and absolute discretion, if such
transfer or other action would result in more than four partners holding all
outstanding Series D Preferred Units, Series H Preferred Units and Series I
Preferred Units within the meaning of Treasury Regulation Section
1.7704-1(h)(1)(ii) (without regard to Treasury Regulation Section
1.7704-1(h)(3)(ii)); provided, however, that the General Partner's consent may
not be unreasonably withheld if (a) such transfer or other action would not
result in more than ten partners holding all outstanding Series D Preferred
Units, Series H Preferred Units and Series I Preferred Units within the meaning
of Treasury Regulation Section 1.7704-1(h)(1)(ii) (without regard to Treasury
Regulation Section 1.7704-1(h)(3)(ii)) and (b) the General Partner cannot rely
on Treasury Regulation Section 1.7704-1(h). In addition, no transfer may be made
to any person if such transfer would cause the exchange of the Series H
Preferred Units for Series H Preferred Shares, as provided herein, to be
required to be registered under the Securities Act of 1933, as amended, or any
state securities laws.

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              Section 21.8. Exchange Rights

              A. Right to Exchange. (i) Series H Preferred Units will be
exchangeable in whole but not in part unless expressly otherwise provided herein
at anytime on or after September 1, 2010, at the option of 51% of the holders of
all outstanding Series H Preferred Units, for authorized but previously unissued
Series H Preferred Shares at an exchange rate of one Series H Preferred Share
from AMB for one Series H Preferred Unit, subject to adjustment as described
below (the "Series H Exchange Price"); provided that the Series H Preferred
Units will become exchangeable at any time, in whole but not in part unless
expressly otherwise provided herein, at the option of 51% of the holders of all
outstanding Series H Preferred Units for Series H Preferred Shares if (y) at any
time full distributions shall not have been timely made on any Series H
Preferred Unit with respect to six (6) prior quarterly distribution periods,
whether or not consecutive; provided, however, that a distribution in respect of
Series H Preferred Units shall be considered timely made if made within two (2)
Business Days after the applicable Series H Preferred Unit Distribution Payment
Date if at the time of such late payment there shall not be any prior quarterly
distribution periods in respect of which full distributions were not timely made
or (z) upon receipt by a holder or holders of Series H Preferred Units of (A)
notice from the General Partner that the General Partner or a Subsidiary of the
General Partner has taken the position that the Partnership is, or upon the
consummation of an identified event in the immediate future will be, a PTP and
(B) an opinion rendered by independent counsel familiar with such matters
addressed to a holder or holders of Series H Preferred Units, that the
Partnership is or likely is, or upon the occurrence of a defined event in the
immediate future will be or likely will be, a PTP.

              In addition, the Series H Preferred Units may be exchanged for
Series H Preferred Shares, in whole but not in part unless expressly otherwise
provided herein, at the option of 51% of the holders of all outstanding Series H
Preferred Units after September 1, 2003 and prior to September 1, 2010 if such
holders of a Series H Preferred Units shall deliver to the General Partner
either (i) a private letter ruling addressed to such holder of Series H
Preferred Units or (ii) an opinion of independent counsel reasonably acceptable
to the General Partner based on a change in statute, the enactment of temporary
or final Treasury Regulations or the publication of a Revenue Ruling or any
other IRS release, in either case to the effect that an exchange of the Series H
Preferred Units at such earlier time would not cause the Series H Preferred
Units to be considered "stock and securities" within the meaning of Section
351(e) of the Code for purposes of determining whether the holder of such Series
H Preferred Units is an "investment company" under Section 721(b) of the Code if
an exchange is permitted at such earlier date.

              (ii) Notwithstanding anything to the contrary set forth in Section
21.8.A(i), if a Series H Exchange Notice (as defined herein) has been delivered
to AMB and the General Partner, then the General Partner may, at its option,
within ten (10) Business Days after receipt of the Series H Exchange Notice,
elect to cause the Partnership to redeem all or a portion of the outstanding
Series H Preferred Units for cash in an amount equal to the original Capital
Contribution per Series H Preferred Unit and all accrued and unpaid
distributions thereon to the date of redemption. If the General Partner elects
to redeem fewer than all of the outstanding Series H Preferred Units, the number
of Series H Preferred Units held by each holder to be redeemed shall equal such
holder's pro rata share (based on the percentage of the aggregate

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number of outstanding Series H Preferred Units that the total number of Series H
Preferred Units held by such holder represents) of the aggregate number of
Series H Preferred Units being redeemed.

              (iii) In the event an exchange of all Series H Preferred Units
pursuant to Section 21.8.A would violate the provisions on ownership limitation
of AMB set forth in Section 7 of Article Third of the Series H Articles
Supplementary, each holder of Series H Preferred Units shall be entitled to
exchange, pursuant to the provisions of Section 21.8.B, a number of Series H
Preferred Units which would comply with the provisions on the ownership
limitation of AMB set forth in such Section 7 of Article Third of the Series H
Articles Supplementary, with respect to such holder, and any Series H Preferred
Units not so exchanged (the "Series H Excess Units") shall be redeemed by the
Partnership for cash in an amount equal to the original Capital Contribution per
Series H Excess Unit, plus any accrued and unpaid distributions thereon to the
date of redemption subject to any restriction thereon contained in any debt
instrument or agreement of the Partnership. In the event an exchange would
result in Series H Excess Units, as a condition to such exchange, each holder of
such units agrees to provide representations and covenants reasonably requested
by AMB relating to (i) the widely held nature of the interests in such holder,
sufficient to assure AMB that the holder's ownership of stock of AMB (without
regard to the limits described above) will not cause any individual to own in
excess of 9.0% of the stock of AMB; and (ii) to the extent such Holder can so
represent and covenant without obtaining information from its owners (other than
one or more direct or indirect parent corporations, limited liability companies
or partnerships and not the holders of any interests in any such parent), the
Holder's ownership of tenants of the Partnership and its affiliates. For
purposes of determining the number of Series H Excess Units under this Section
21.8.A(iii), the "Ownership Limit" set forth in the Series H Articles
Supplementary shall be deemed to be 9.0%. To the extent the Partnership would
not be able to pay the cash set forth above in exchange for the Series H Excess
Units, and to the extent consistent with the REIT Charter, AMB agrees that it
will grant to the holders of the Series H Preferred Units exceptions to the
Ownership Limit set forth in the Series H Articles Supplementary sufficient to
allow such Holders to exchange all of their Series H Preferred Units for Series
H Preferred Shares; provided such holders furnish to AMB representations
acceptable to AMB in its sole and absolute discretion which assure AMB that such
exceptions will not jeopardize AMB's tax status as a REIT for purposes of
federal and applicable state law. Notwithstanding any provision of this
Agreement to the contrary, no Series H Limited Partner shall be entitled to
effect an exchange of Series H Preferred Units for Series H Preferred Shares to
the extent that ownership or right to acquire such shares would cause the
Partner or any other Person or, in the opinion of counsel selected by AMB, may
cause the Partner or any other Person, to violate the restrictions on ownership
and transfer of Series H Preferred Shares set forth in the REIT Charter. To the
extent any such attempted exchange for Series H Preferred Shares would be in
violation of the previous sentence, it shall be void ab initio and such Series H
Limited Partner shall not acquire any rights or economic interest in the Series
H Preferred Shares otherwise issuable upon such exchange.

              (iv) The redemption of Series H Preferred Units described in
Section 20.8.A(ii) and (iii) shall be subject to the provisions of Section
21.5.B(i) and Section 21.5.C(ii); provided, however, that the term "Series H
Redemption Price" in such Sections 21.5.B(i) and 21.5.C(ii) shall be read to
mean the original Capital Contribution per Series H Preferred Unit being

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redeemed as set forth on Exhibit A plus all accrued and unpaid distributions to
the redemption date.

              B. Procedure for Exchange of Series H Preferred Units and/or
Series H Redemption.

              (i) Any exchange shall be exercised pursuant to a notice of
exchange (the "Series H Exchange Notice") delivered to AMB and the General
Partner by the Partners representing at least 51% of the outstanding Series H
Preferred Units (or by the Series H Contributor in the case of an exchange
pursuant to the last sentence of Section 21.8.A.(i) hereof) by (a) fax and (b)
by certified mail postage prepaid. AMB may effect any exchange of Series H
Preferred Units, or the General Partner may exercise its option to cause the
Partnership to redeem any portion of the Series H Preferred Units for cash
pursuant to Section 21.8.A(ii) or redeem Series H Excess Units pursuant to
Section 21.8.A(iii), by delivering to each holder of record of Series H
Preferred Units, within ten (10) Business Days following receipt of the Series H
Exchange Notice, (a) if the General Partner elects to cause the Partnership to
acquire any of the Series H Preferred Units then outstanding, (1) certificates
representing the Series H Preferred Shares being issued in exchange for the
Series H Preferred Units of such holder being exchanged and (2) a written notice
(a "Series H Redemption Notice") stating (A) the redemption date, which may be
the date of such Series H Redemption Notice or any other date which is not later
than sixty (60) days following the receipt of the Series H Exchange Notice, (B)
the redemption price, (C) the place or places where the Series H Preferred Units
are to be surrendered and (D) that distributions on the Series H Preferred Units
will cease to accrue on such redemption date, or (b) if the General Partner
elects to cause the Partnership to redeem all of the Series H Preferred Units
then outstanding in exchange for cash, a Series H Redemption Notice. Series H
Preferred Units which are redeemed shall be deemed canceled (and any
corresponding Partnership Interest represented thereby deemed terminated) on the
redemption date. Holders of Series H Preferred Units shall deliver any canceled
certificates representing Series H Preferred Units which have been exchanged or
redeemed to the office of the General Partner (which currently is located at
Pier 1, Bay 1, San Francisco, California 94111) within ten (10) Business Days of
the exchange or redemption with respect thereto. Notwithstanding anything to the
contrary contained herein, any and all Series H Preferred Units to be exchanged
for Series H Preferred Shares pursuant to this Section 21.8 shall be so
exchanged in a single transaction at one time. As a condition to exchange, AMB
may require the holders of Series H Preferred Units to make such representations
as may be reasonably necessary for the General Partner to establish that the
issuance of Series H Preferred Shares pursuant to the exchange shall not be
required to be registered under the Securities Act or any state securities laws.
Any Series H Preferred Shares issued pursuant to this Section 21.8 shall be
delivered as shares which are duly authorized, validly issued, fully paid and
nonassessable, free of any pledge, lien, encumbrance or restriction other than
those provided in the REIT Charter, the Bylaws of AMB, the Securities Act and
relevant state securities or blue sky laws.

              The certificates representing the Series H Preferred Shares issued
upon exchange of the Series H Preferred Units shall contain the following
legend:

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              THE SHARES REPRESENTED BY THIS CERTIFICATE MAY NOT BE TRANSFERRED,
              SOLD, ASSIGNED, PLEDGED, HYPOTHECATED OR OTHERWISE DISPOSED OF
              EXCEPT (A) PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER
              THE SECURITIES ACT OF 1933, AS AMENDED (THE "ACT"), AND STATE
              SECURITIES LAWS OR (B) IF THE CORPORATION HAS BEEN FURNISHED WITH
              A SATISFACTORY OPINION OF COUNSEL FOR THE HOLDER OF THE SHARES
              REPRESENTED HEREBY, OR OTHER EVIDENCE SATISFACTORY TO THE
              CORPORATION, THAT SUCH TRANSFER, SALE, ASSIGNMENT, PLEDGE,
              HYPOTHECATION OR OTHER DISPOSITION IS EXEMPT FROM THE PROVISIONS
              OF SECTION 5 OF THE ACT AND STATE SECURITIES LAWS AND THE RULES
              AND REGULATIONS THEREUNDER.

              (ii) In the event of an exchange of Series H Preferred Units for
Series H Preferred Shares, an amount equal to the accrued and unpaid
distributions to the date of exchange on any Series H Preferred Units tendered
for exchange shall (i) accrue on the Series H Preferred Shares into which such
Series H Preferred Units are exchanged, and (ii) continue to accrue on such
Series H Preferred Units, which shall remain outstanding following such
exchange, with the General Partner as the holder of such Series H Preferred
Units. Notwithstanding anything to the contrary set forth herein, in no event
shall a Holder of a Series H Preferred Unit that was validly exchanged for
Series H Preferred Shares pursuant to this Section (other than the General
Partner holding such Series H Preferred Unit following any such exchange),
receive a distribution out of Available Cash of the Partnership, if such Holder,
after exchange, is entitled to receive a distribution with respect to the Series
H Preferred Shares for which such Series H Preferred Unit was exchanged or
redeemed. Further, for purposes of the foregoing, in the event of an exchange of
Series H Preferred Units for Series H Preferred Shares, if the accrued and
unpaid distributions per Series H Preferred Unit is not the same for each Series
H Preferred Unit, the accrued and unpaid distributions per Series H Preferred
Unit for each such Series H Preferred Unit shall be equal to the greatest amount
of such accrued and unpaid distributions per Series H Preferred Unit on any such
unit.

              (iii) Fractional Series H Preferred Shares are not to be issued
upon exchange but, in lieu thereof, the General Partner will pay a cash
adjustment based upon the fair market value of the Series H Preferred Shares on
the day prior to the exchange date as determined in good faith by the board of
directors of the General Partner.

              C. Adjustment of Series H Exchange Price. In case AMB shall be a
party to any transaction (including, without limitation, a merger,
consolidation, statutory share exchange, tender offer for all or substantially
all of AMB's capital stock or sale of all or substantially all of AMB's assets),
in each case as a result of which the Series H Preferred Shares will be
converted into the right to receive shares of capital stock, other securities or
other property (including cash or any combination thereof), each Series H
Preferred Unit will thereafter be exchangeable into the kind and amount of
shares of capital stock and other securities and property receivable

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(including cash or any combination thereof) upon the consummation of such
transaction by a holder of that number of Series H Preferred Shares or fraction
thereof into which one Series H Preferred Unit was exchangeable immediately
prior to such transaction. AMB may not become a party to any such transaction
unless the terms thereof are consistent with the foregoing. AMB and the
Operating Partnership further agree that, notwithstanding any transaction to
which either may be a party (including, without limitation, any merger,
consolidation, statutory share exchange, tender offer for all or substantially
all of such entity's capital stock or partnership interests or sale of all or
substantially all of such entity's assets), immediately following any such
transaction, the issuer or issuers of any shares of capital stock and other
securities into which the Series H Preferred Units shall be exchangeable
pursuant to this Section 21.8 shall be the same issuer or issuers of shares of
capital stock and other securities into which (i) the Series B Preferred Units
are then exchangeable (or, if the Series B Preferred Units have previously been
redeemed in full, would have been then exchangeable if then still outstanding),
(ii) the Series C Preferred Units are then exchangeable (or, if the Series C
Preferred Units have previously been redeemed in full, would have been then
exchangeable if then still outstanding), (iii) the Series D Preferred Units are
then exchangeable (or, if the Series D Preferred Units have previously been
redeemed in full, would have been then exchangeable if then still outstanding),
(iv) the Series E Preferred Units are then exchangeable (or, if the Series E
Preferred Units have previously been redeemed in full, would have been then
exchangeable if then still outstanding), (v) the Series F Preferred Units are
then exchangeable (or, if the Series F Preferred Units have previously been
redeemed in full, would have been then exchangeable if then still outstanding),
(vi) the Series G Preferred Units are then exchangeable (or, if the Series G
Preferred Units have previously been redeemed in full, would have been then
exchangeable if then still outstanding) and (vii) the Series I Preferred Units
are then exchangeable (or, if the Series I Preferred Units have previously been
redeemed in full, would have been then exchangeable if then still outstanding).

              Section 21.9.  No Conversion Rights

              The Series H Preferred Units shall not be convertible into any
other class or series of interest in the Partnership.

              Section 21.10. No Sinking Fund

              No sinking fund shall be established for the retirement or
redemption of Series H Preferred Units.

                                   ARTICLE 22.
                            SERIES I PREFERRED UNITS

              Section 22.1.  Designation and Number

              A series of Partnership Units in the Partnership designated as the
8.00% Series I Cumulative Redeemable Preferred Units (the "Series I Preferred
Units") is hereby established. The number of Series I Preferred Units shall be
510,000.

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              Section 22.2. Ranking

              The Series I Preferred Units shall, with respect to distribution
rights and rights upon voluntary or involuntary liquidation, winding up or
dissolution of the Partnership, rank (i) senior to the Common Units and to all
Partnership Units the terms of which provide that such Partnership Units shall
rank junior to the Series I Preferred Units; (ii) on a parity with the Series C
Preferred Units, the Series D Preferred Units, the Series E Preferred Units, the
Series F Preferred Units, the Series G Preferred Units, the Series H Preferred
Units and all other Parity Preferred Units; and (iii) junior to all Partnership
Units which rank senior to the Series I Preferred Units.

              Section 22.3. Distributions

              A. Payment of Distributions. Subject to the rights of holders of
Parity Preferred Units as to the payment of distributions (including pursuant to
Sections 5.1, 16.3.A, 17.3A, 18.3A, 19.3A, 20.3A and 21.3A hereof), holders of
Series I Preferred Units will be entitled to receive, when, as and if declared
by the Partnership acting through the General Partner, out of Available Cash,
cumulative preferential cash distributions in an amount equal to the Series I
Priority Return. Such distributions will be payable (A) quarterly (such
quarterly periods for purposes of payment and accrual will be the quarterly
periods ending on the dates specified in this sentence and not calendar year
quarters) in arrears, on the 25th day of March, June, September and December of
each year and (B) in the event of (i) an exchange of Series I Preferred Units
into Series I Preferred Shares, or (ii) a redemption of Series I Preferred
Units, on the exchange date or redemption date, as applicable (each a "Series I
Preferred Unit Distribution Payment Date"), commencing on the first of such
payment dates to occur following their original date of issuance. If any date on
which distributions are to be made on the Series I Preferred Units is not a
Business Day, then payment of the distribution to be made on such date will be
made on the next succeeding day that is a Business Day (and without any interest
or other payment in respect of any such delay) except that, if such Business Day
is in the next succeeding calendar year, such payment shall be made on the
immediately preceding Business Day, in each case with the same force and effect
as if made on such date. Distributions on the Series I Preferred Units will be
made to the holders of record of the Series I Preferred Units on the relevant
record dates, which will be fifteen (15) days prior to the relevant Series I
Preferred Unit Distribution Payment Date (the "Series I Preferred Unit
Partnership Record Date"). For purposes of clarifying the relative distribution
priority rights among the Series I Preferred Units, the Series H Preferred
Units, the Series G Preferred Units, the Series F Preferred Units, the Series E
Preferred Units, the Series D Preferred Units and the Series C Preferred Units,
the payment of distributions with respect to a series of such Preferred Units
prior to the payment of distributions with respect to another such series of
Preferred Units, solely as a result of the distribution payment dates with
respect to a series of Preferred Units occurring on a different date from
another series of Preferred Units, shall not be deemed to create a priority in
favor of one series of Preferred Units over any other series of Preferred Units.

              B. Distributions Cumulative. Notwithstanding the foregoing,
distributions on the Series I Preferred Units will accrue whether or not the
terms and provisions of any agreement of the Partnership at any time prohibit
the current payment of distributions, whether or not the

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Partnership has earnings, whether or not there are funds legally available for
the payment of such of such distributions and whether or not such distributions
are authorized. Accrued but unpaid distributions on the Series I Preferred Units
will accumulate as of the Preferred Unit Distribution Payment Date on which they
first become payable.

              C. Priority as to Distributions. (i) So long as any Series I
Preferred Units are outstanding, no distribution of cash or other property shall
be authorized, declared, paid or set apart for payment on or with respect to any
class or series of Partnership Interest represented by Junior Units, nor shall
any Junior Units or Parity Preferred Units be redeemed, purchased or otherwise
acquired for any consideration (or any monies be paid to or made available for a
sinking fund for the redemption of any such Junior Units or Parity Preferred
Units) by the Partnership (except by conversion into or exchange for other
Junior Units or Parity Preferred Units, as the case may be) unless, in each
case, full cumulative distributions have been or contemporaneously are
authorized and paid or authorized and a sum sufficient for the payment thereof
set apart for such payment on the Series I Preferred Units and all classes and
series of outstanding Parity Preferred Units for all distribution periods. The
foregoing sentence will not prohibit (a) distributions payable solely in Junior
Units, (b) the exchange of Junior Units or Parity Preferred Units into
Partnership Interests of the Partnership ranking junior to the Series I
Preferred Units as to distributions and upon voluntary and involuntary
liquidation, dissolution or winding up of the Partnership, or (c) distributions
necessary to enable the Operating Partnership to redeem partnership interests
corresponding to Series I Preferred Shares and any Parity Preferred Stock with
respect to distributions or Junior Stock to be purchased by AMB pursuant to the
REIT Charter to preserve AMB's status as a REIT; provided that such redemption
shall be upon the same terms as the corresponding stock purchase pursuant to the
REIT Charter.

              (ii) So long as distributions have not been paid in full (or a sum
sufficient for such full payment is not so set apart) upon the Series I
Preferred Units and any other Parity Preferred Units, all distributions
authorized and declared on the Series I Preferred Units and all classes or
series of outstanding Parity Preferred Units shall be authorized and declared
pro rata so that the amount of distributions authorized and declared per Series
I Preferred Unit and such other classes or series of Parity Preferred Units
shall in all cases bear to each other the same ratio that accrued distributions
per Series I Preferred Unit and such other classes or series of Parity Preferred
Units (which shall not include any accumulation in respect of unpaid
distributions for prior distribution periods if such class or series of Parity
Preferred Units do not have cumulative distribution rights) bear to each other.
No interest, or sum of money in lieu of interest, shall be payable in respect of
any distributions or payments on Series I Preferred Units which may be in
arrears.

              (iii) Notwithstanding anything to the contrary set forth herein,
distributions on Partnership Interests held by either (a) the General Partner,
(b) the Operating Partnership or (c) any other holder of Partnership Interests
in the Partnership, in each case ranking junior to or on parity with the Series
I Preferred Units may be made, without preserving the priority of distributions
described in Sections 22.3.C(i) and (ii), but only to the extent such
distributions are required to preserve the REIT status of AMB, in its capacity
as sole general partner of the Operating Partnership and as sole stockholder of
the General Partner, and in the case of any holder other than the General
Partner only to the extent required by the Partnership Agreement;

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provided, that the Partnership shall not be disproportionately burdened by this
provision relative to the cash flow generated by other assets owned directly or
indirectly by AMB.

              D. No Further Rights. Holders of Series I Preferred Units shall
not be entitled to any distributions, whether payable in cash, other property or
otherwise, in excess of the full cumulative distributions described herein.

              Section 22.4. Liquidation Proceeds

              A. Distributions. Upon voluntary or involuntary liquidation,
dissolution or winding-up of the Partnership, distributions on the Series I
Preferred Units shall be made in accordance with Article 13 of this Agreement.

              B. Notice. Written notice of any such voluntary or involuntary
liquidation, dissolution or winding-up of the Partnership, stating the payment
date or dates when, and the place or places where, the amounts distributable in
such circumstances shall be payable, shall be given by the General Partner
pursuant to Section 13.6 hereof.

              C. No Further Rights. After payment of the full amount of the
liquidating distributions to which they are entitled, Holders of Series I
Preferred Units will have no right or claim to any of the remaining assets of
the Partnership.

              D. Consolidation, Merger or Certain Other Transactions. None of a
consolidation or merger of the Partnership with or into another entity, a merger
of another entity with or into the Partnership, or a sale, lease, transfer or
conveyance of all or substantially all of the Partnership's property or business
shall be considered a liquidation, dissolution or winding up of the Partnership.

              Section 22.5. Series I Redemption

              A. Series I Redemption. The Series I Preferred Units may not be
redeemed prior to March 21, 2006. On or after such date, the Partnership shall
have the right to redeem the Series I Preferred Units, in whole or in part, at
any time or from time to time, upon not less than 30 nor more than 60 days'
written notice, at a redemption price, payable in cash (a "Series I
Redemption"), equal to the Capital Account balance of the holder of Series I
Preferred Units (the "Series I Redemption Price"); provided, however, that no
redemption pursuant to this Section 21.5 will be permitted if the Series I
Redemption Price does not equal or exceed the original Capital Contribution of
such holder plus the cumulative Series I Priority Return to the redemption date
to the extent not previously distributed. If fewer than all of the outstanding
Series I Preferred Units are to be redeemed, the Series I Preferred Units to be
redeemed shall be selected pro rata (as nearly as practicable without creating
fractional units).

              B. Limitation on Series I Redemption. (i) The Series I Redemption
Price of the Series I Preferred Units (other than the portion thereof consisting
of accumulated but unpaid distributions) is payable solely out of the sale
proceeds of capital stock of AMB, which will be contributed by AMB to the
General Partner or the Operating Partnership and which in turn will be
contributed by the General Partner or the Operating Partnership to the
Partnership as an

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additional capital contribution, or out of the sale of limited partner interests
in the Partnership or the Operating Partnership and from no other source. For
purposes of the preceding sentence, "capital stock" means any equity securities
(including Common Stock and Preferred Stock (as such terms are defined in the
REIT Charter), depository shares, interests, participation or other ownership
interests (however designated) and any rights (other than debt securities
convertible into or exchangeable for equity securities) or options to purchase
any of the foregoing.

              (ii) The Partnership may not redeem fewer than all of the
outstanding Series I Preferred Units unless all accumulated and unpaid
distributions have been paid on all Series I Preferred Units for all quarterly
distribution periods terminating on or prior to the date of redemption.

              C. Procedures for Series I Redemption. (i) Notice of redemption
will be (i) faxed, and (ii) mailed by the Partnership, by certified mail,
postage prepaid, not less than 30 nor more than 60 days prior to the redemption
date, addressed to the respective holders of record of the Series I Preferred
Units at their respective addresses as they appear on the records of the
Partnership. No failure to give or defect in such notice shall affect the
validity of the proceedings for the redemption of any Series I Preferred Units
except as to the holder to whom such notice was defective or not given. In
addition to any information required by law, each such notice shall state: (a)
the redemption date, (b) the Series I Redemption Price, (c) the aggregate number
of Series I Preferred Units to be redeemed and if fewer than all of the
outstanding Series I Preferred Units are to be redeemed, the number of Series I
Preferred Units to be redeemed held by such holder, which number shall equal
such holder's pro rata share (based on the percentage of the aggregate number of
outstanding Series I Preferred Units that the total number of Series I Preferred
Units held by such holder represents) of the aggregate number of Series I
Preferred Units to be redeemed, (d) the place or places where such Series I
Preferred Units are to be surrendered for payment of the Series I Redemption
Price, (e) that distributions on the Series I Preferred Units to be redeemed
will cease to accumulate on such redemption date and (f) that payment of the
Series I Redemption Price will be made upon presentation and surrender of such
Series I Preferred Units.

              (ii) If the Partnership gives a notice of redemption in respect of
Series I Preferred Units (which notice will be irrevocable) then, by 12:00 noon,
New York City time, on the redemption date, the Partnership will deposit
irrevocably in trust for the benefit of the Series I Preferred Units being
redeemed funds sufficient to pay the applicable Series I Redemption Price and
will give irrevocable instructions and authority to pay such Series I Redemption
Price to the holders of the Series I Preferred Units upon surrender of the
Series I Preferred Units by such holders at the place designated in the notice
of redemption. On and after the date of redemption, distributions will cease to
accumulate on the Series I Preferred Units or portions thereof called for
redemption, unless the Partnership defaults in the payment thereof. If any date
fixed for redemption of Series I Preferred Units is not a Business Day, then
payment of the Series I Redemption Price payable on such date will be made on
the next succeeding day that is a Business Day (and without any interest or
other payment in respect of any such delay) except that, if such Business Day
falls in the next calendar year, such payment will be made on the immediately
preceding Business Day, in each case with the same force and effect as if made
on such date fixed for redemption. If payment of the Series I Redemption Price
is improperly

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withheld or refused and not paid by the Partnership, distributions on such
Series I Preferred Units will continue to accumulate from the original
redemption date to the date of payment, in which case the actual payment date
will be considered the date fixed for redemption for purposes of calculating the
applicable Series I Redemption Price.

              Section 22.6. Voting and Certain Management Rights

              A. General. Holders of the Series I Preferred Units will not have
any voting rights or right to consent to any matter requiring the consent or
approval of the Limited Partners, except as set forth below and in Section
7.3.E.

              B. Certain Voting Rights. So long as any Series I Preferred Units
remains outstanding, the Partnership shall not, without the affirmative vote of
the holders of at least two-thirds of the Series I Preferred Units outstanding
at the time (i) authorize or create, or increase the authorized or issued amount
of, any class or series of Partnership Interests ranking prior to the Series I
Preferred Units with respect to payment of distributions or rights upon
liquidation, dissolution or winding-up or reclassify any Partnership Interests
of the Partnership into any such Partnership Interest, or create, authorize or
issue any obligations or security convertible into or evidencing the right to
purchase any such Partnership Interests, (ii) authorize or create, or increase
the authorized or issued amount of any Parity Preferred Units or reclassify any
Partnership Interest of the Partnership into any such Partnership Interest or
create, authorize or issue any obligations or security convertible into or
evidencing the right to purchase any such Partnership Interests but only to the
extent such Parity Preferred Units are issued to an affiliate of the
Partnership, other than AMB or the Operating Partnership to the extent the
issuance of such interests was to allow AMB or the Operating Partnership to
issue corresponding preferred stock or preferred interests to persons who are
not affiliates of the Partnership (other than AMB to the extent AMB issues
corresponding preferred stock to persons who are not affiliates of the
Partnership or the Operating Partnership) or (iii) either consolidate, merge
into or with, or convey, transfer or lease its assets substantially as an
entirety to, any corporation or other entity or amend, alter or repeal the
provisions of the Partnership Agreement (including, without limitation, this
Article 22 and Section 11.2), whether by merger, consolidation or otherwise, in
each case in a manner that would materially and adversely affect the powers,
special rights, preferences, privileges or voting power of the Series I
Preferred Units or the holders thereof; provided, however, that with respect to
the occurrence of any event set forth in (iii) above, so long as (a) the
Partnership is the surviving entity and the Series I Preferred Units remain
outstanding with the terms thereof unchanged, or (b) the resulting, surviving or
transferee entity is a partnership, limited liability company or other
pass-through entity organized under the laws of any state and substitutes the
Series I Preferred Units for other interests in such entity having substantially
the same terms and rights as the Series I Preferred Units, including with
respect to distributions, voting rights and rights upon liquidation, dissolution
or winding-up, then the occurrence of any such event shall not be deemed to
materially and adversely affect such rights, privileges or voting powers of the
holders of the Series I Preferred Units; and provided further, that any increase
in the amount of Partnership Interests or the creation or issuance of any other
class or series of Partnership Interests represented by Junior Units or Parity
Preferred Units that are not issued to an affiliate of the Partnership, other
than the General Partner or the Operating Partnership to the extent the issuance
of such interests was to allow the General Partner or the

                                      144
<PAGE>   150

Operating Partnership to issue corresponding preferred stock or preferred
interests to persons who are not affiliates of the Partnership (other than AMB
to the extent AMB issues corresponding preferred stock or preferred interests to
persons who are not affiliates of the Partnership or the Operating Partnership),
shall not be deemed to materially and adversely affect such rights, preferences,
privileges or voting powers.

              C. So long as any Series I Preferred Units remain outstanding, the
General Partner shall not, without the affirmative vote of the holders of at
least two-thirds of the Series I Preferred Units outstanding at the time, take
any action which would result in the termination of the right of the holders of
such units to effect an exchange pursuant to Section 22.8; provided however, no
such vote shall be required so long as the Series I Preferred Units (or any
interests substituted therefore pursuant to Section 22.6.B) remain outstanding
and are exchangeable for Series I Preferred Shares or stock in another entity
having substantially the same terms and rights as the Series I Preferred Shares.

              D. Notwithstanding anything to the contrary contained in this
Agreement, including, without limitation, the provisions of Article 7 regarding
the management rights and responsibilities of the General Partner, whenever
distributions on any Series I Preferred Units shall remain unpaid for six or
more quarterly periods (i.e., the quarterly periods ending on the 25th day of
March, June, September and December, or, if not a business day, the next
succeeding business day, beginning with the quarterly period ending March 25,
2001) (whether or not consecutive), the holders of 51% of either (i) such Series
I Preferred Units, in the event that the holders of the Series D Preferred
Units, Series E Preferred Units, Series F Preferred Units, Series G Preferred
Units and Series H Preferred Units are not entitled to exercise management
rights pursuant to Section 17.6D, Section 18.6.D, Section 19.6.D, Section 20.6.D
and Section 21.6.D, respectively, and that no Future Parity Preferred
Unitholders are entitled to exercise management rights similar to those to which
the holders of Series D Preferred Units, Series E Preferred Units, Series F
Preferred Units, Series G Preferred Units, Series H Preferred Units and Series I
Preferred Units are entitled to exercise pursuant to Section 17.6D, Section
18.6.D, Section 19.6.D, Section 20.6.D, Section 21.6.D and this Section 22.6.D,
respectively, or (ii) the Parity Preferred Capital, in the event that holders of
Series D Preferred Units, Series E Preferred Units, Series F Preferred Units,
Series G Preferred Units or Series H Preferred Units are entitled to exercise
management rights pursuant to Section 17.6D, Section 18.6.D, Section 19.6.D,
Section 20.6.D or Section 21.6.D, respectively, or Future Parity Preferred
Unitholders are entitled to exercise management rights similar to those to which
the holders of Series D Preferred Units, Series E Preferred Units, Series F
Preferred Units, Series G Preferred Units, Series H Preferred Units and Series I
Preferred Units are entitled to exercise pursuant to Section 17.6D, Section
18.6.D, Section 19.6.D, Section 20.6.D, Section 21.6.D and this Section 22.6.D,
respectively, shall be entitled to assume rights to manage the Partnership and
perform actions related thereto for the sole purpose of enforcing the
Partnership's rights and remedies as against obligees of the Partnership or
other Persons from whom the Partnership may be entitled to receive cash or other
assets, until all distributions accumulated on the Series I Preferred Units for
all past quarterly periods and the distribution for the then-current quarterly
period shall have been fully-paid or declared and a sum sufficient for the
payment thereof irrevocably set aside in trust for payment in full; provided,
however, that no such holder or holders of Series I Preferred Units may at any
time take any action (or fail to take any action) if the consequence of such
action (or inaction)

                                      145
<PAGE>   151

would be (i) to cause AMB to fail to qualify as a REIT for federal or applicable
state income tax purposes or (ii) to cause the Partnership or the Operating
Partnership to fail to qualify as a partnership for federal or applicable state
income tax purposes, or (iii) to cause the Partnership, the Operating
Partnership, the General Partner, or AMB to be considered an "investment
company" as defined in, or otherwise be subject to regulation under, the
Investment Company Act of 1940, as amended; and provided, further, that solely
for purposes of exercising the management rights set forth in this Section
22.6.D, each holder of Series I Preferred Units shall be deemed an Indemnitee,
and shall be entitled to the benefits of the indemnification provisions of
Section 7.7 with respect to any and all action(s) taken (or failure(s) to act)
by a holder of Series I Preferred Units in the exercise of (or failure(s) to
exercise) the management rights described in this Section 22.6.D, including,
without limitation, alleged breaches of the General Partner's fiduciary duty to
the Partners; and provided further, that the holders of the Series I Preferred
Units acknowledge and agree that the General Partner and the Partnership have
provided similar management rights to the holders of the Series D Preferred
Units, the Series E Preferred Units, the Series F Preferred Units, Series G
Preferred Units and Series H Preferred Units and shall be entitled to provide
similar management rights to Future Parity Preferred Unitholders.

              Section 22.7. Transfer Restrictions

              The Series I Preferred Units shall be subject to the provisions of
Article 11 hereof. Notwithstanding any provision to the contrary herein, no
transfer of Series I Preferred Units, or other action by the holder or holders
of such Units, is permitted without the consent of the General Partner which
consent may be given or withheld in its sole and absolute discretion, if such
transfer or other action would result in more than four partners holding all
outstanding Series D Preferred Units, Series H Preferred Units and Series I
Preferred Units within the meaning of Treasury Regulation Section
1.7704-1(h)(1)(ii) (without regard to Treasury Regulation Section
1.7704-1(h)(3)(ii)); provided, however, that the General Partner's consent may
not be unreasonably withheld if (a) such transfer or other action would not
result in more than ten partners holding all outstanding Series D Preferred
Units, Series H Preferred Units and Series I Preferred Units within the meaning
of Treasury Regulation Section 1.7704-1(h)(1)(ii) (without regard to Treasury
Regulation Section 1.7704-1(h)(3)(ii)) and (b) the General Partner cannot rely
on Treasury Regulation Section 1.7704-1(h). In addition, no transfer may be made
to any person if such transfer would cause the exchange of the Series I
Preferred Units for Series I Preferred Shares, as provided herein, to be
required to be registered under the Securities Act of 1933, as amended, or any
state securities laws.

              Section 22.8. Exchange Rights

              A. Right to Exchange. (i) Series I Preferred Units will be
exchangeable in whole but not in part unless expressly otherwise provided herein
at anytime on or after March 21, 2011, at the option of 51% of the holders of
all outstanding Series I Preferred Units, for authorized but previously unissued
Series I Preferred Shares at an exchange rate of one Series I Preferred Share
from AMB for one Series I Preferred Unit, subject to adjustment as described
below (the "Series I Exchange Price"); provided that the Series I Preferred
Units will become exchangeable at any time, in whole but not in part unless
expressly otherwise provided herein, at

                                      146
<PAGE>   152

the option of 51% of the holders of all outstanding Series I Preferred Units for
Series I Preferred Shares if (y) at any time full distributions shall not have
been timely made on any Series I Preferred Unit with respect to six (6) prior
quarterly distribution periods, whether or not consecutive; provided, however,
that a distribution in respect of Series I Preferred Units shall be considered
timely made if made within two (2) Business Days after the applicable Series I
Preferred Unit Distribution Payment Date if at the time of such late payment
there shall not be any prior quarterly distribution periods in respect of which
full distributions were not timely made or (z) upon receipt by a holder or
holders of Series I Preferred Units of (A) notice from the General Partner that
the General Partner or a Subsidiary of the General Partner has taken the
position that the Partnership is, or upon the consummation of an identified
event in the immediate future will be, a PTP and (B) an opinion rendered by
independent counsel familiar with such matters addressed to a holder or holders
of Series I Preferred Units, that the Partnership is or likely is, or upon the
occurrence of a defined event in the immediate future will be or likely will be,
a PTP.

              In addition, the Series I Preferred Units may be exchanged for
Series I Preferred Shares, in whole but not in part unless expressly otherwise
provided herein, at the option of 51% of the holders of all outstanding Series I
Preferred Units after March 21, 2004 and prior to March 21, 2011 if such holders
of a Series I Preferred Units shall deliver to the General Partner either (i) a
private letter ruling addressed to such holder of Series I Preferred Units or
(ii) an opinion of independent counsel reasonably acceptable to the General
Partner based on a change in statute, the enactment of temporary or final
Treasury Regulations or the publication of a Revenue Ruling or any other IRS
release, in either case to the effect that an exchange of the Series I Preferred
Units at such earlier time would not cause the Series I Preferred Units to be
considered "stock and securities" within the meaning of Section 351(e) of the
Code for purposes of determining whether the holder of such Series I Preferred
Units is an "investment company" under Section 721(b) of the Code if an exchange
is permitted at such earlier date.

              (ii) Notwithstanding anything to the contrary set forth in Section
22.8.A(i), if a Series I Exchange Notice (as defined herein) has been delivered
to AMB and the General Partner, then the General Partner may, at its option,
within ten (10) Business Days after receipt of the Series I Exchange Notice,
elect to cause the Partnership to redeem all or a portion of the outstanding
Series I Preferred Units for cash in an amount equal to the original Capital
Contribution per Series I Preferred Unit and all accrued and unpaid
distributions thereon to the date of redemption. If the General Partner elects
to redeem fewer than all of the outstanding Series I Preferred Units, the number
of Series I Preferred Units held by each holder to be redeemed shall equal such
holder's pro rata share (based on the percentage of the aggregate number of
outstanding Series I Preferred Units that the total number of Series I Preferred
Units held by such holder represents) of the aggregate number of Series I
Preferred Units being redeemed.

              (iii) In the event an exchange of all Series I Preferred Units
pursuant to Section 22.8.A would violate the provisions on ownership limitation
of AMB set forth in Section 7 of Article Third of the Series I Articles
Supplementary, each holder of Series I Preferred Units shall be entitled to
exchange, pursuant to the provisions of Section 22.8.B, a number of Series I
Preferred Units which would comply with the provisions on the ownership
limitation of AMB set

                                      147
<PAGE>   153

forth in such Section 7 of Article Third of the Series I Articles Supplementary,
with respect to such holder, and any Series I Preferred Units not so exchanged
(the "Series I Excess Units") shall be redeemed by the Partnership for cash in
an amount equal to the original Capital Contribution per Series I Excess Unit,
plus any accrued and unpaid distributions thereon to the date of redemption
subject to any restriction thereon contained in any debt instrument or agreement
of the Partnership. In the event an exchange would result in Series I Excess
Units, as a condition to such exchange, each holder of such units agrees to
provide representations and covenants reasonably requested by AMB relating to
(i) the widely held nature of the interests in such holder, sufficient to assure
AMB that the holder's ownership of stock of AMB (without regard to the limits
described above) will not cause any individual to own in excess of 9.0% of the
stock of AMB; and (ii) to the extent such Holder can so represent and covenant
without obtaining information from its owners (other than one or more direct or
indirect parent corporations, limited liability companies or partnerships and
not the holders of any interests in any such parent), the Holder's ownership of
tenants of the Partnership and its affiliates. For purposes of determining the
number of Series I Excess Units under this Section 22.8.A(iii), the "Ownership
Limit" set forth in the Series I Articles Supplementary shall be deemed to be
9.0%. To the extent the Partnership would not be able to pay the cash set forth
above in exchange for the Series I Excess Units, and to the extent consistent
with the REIT Charter, AMB agrees that it will grant to the holders of the
Series I Preferred Units exceptions to the Ownership Limit set forth in the
Series I Articles Supplementary sufficient to allow such Holders to exchange all
of their Series I Preferred Units for Series I Preferred Shares; provided such
holders furnish to AMB representations acceptable to AMB in its sole and
absolute discretion which assure AMB that such exceptions will not jeopardize
AMB's tax status as a REIT for purposes of federal and applicable state law.
Notwithstanding any provision of this Agreement to the contrary, no Series I
Limited Partner shall be entitled to effect an exchange of Series I Preferred
Units for Series I Preferred Shares to the extent that ownership or right to
acquire such shares would cause the Partner or any other Person or, in the
opinion of counsel selected by AMB, may cause the Partner or any other Person,
to violate the restrictions on ownership and transfer of Series I Preferred
Shares set forth in the REIT Charter. To the extent any such attempted exchange
for Series I Preferred Shares would be in violation of the previous sentence, it
shall be void ab initio and such Series I Limited Partner shall not acquire any
rights or economic interest in the Series I Preferred Shares otherwise issuable
upon such exchange.

              (iv) The redemption of Series I Preferred Units described in
Section 22.8.A(ii) and (iii) shall be subject to the provisions of Section
22.5.B(i) and Section 22.5.C(ii); provided, however, that the term "Series I
Redemption Price" in such Sections 22.5.B(i) and 22.5.C(ii) shall be read to
mean the original Capital Contribution per Series I Preferred Unit being
redeemed as set forth on Exhibit A plus all accrued and unpaid distributions to
the redemption date.

              B. Procedure for Exchange of Series I Preferred Units and/or
Series I Redemption.

              (i) Any exchange shall be exercised pursuant to a notice of
exchange (the "Series I Exchange Notice") delivered to AMB and the General
Partner by the Partners representing at least 51% of the outstanding Series I
Preferred Units (or by the Series I Contributor in the case of

                                      148
<PAGE>   154

an exchange pursuant to the last sentence of Section 22.8.A.(i) hereof) by (a)
fax and (b) by certified mail postage prepaid. AMB may effect any exchange of
Series I Preferred Units, or the General Partner may exercise its option to
cause the Partnership to redeem any portion of the Series I Preferred Units for
cash pursuant to Section 22.8.A(ii) or redeem Series I Excess Units pursuant to
Section 22.8.A(iii), by delivering to each holder of record of Series I
Preferred Units, within ten (10) Business Days following receipt of the Series I
Exchange Notice, (a) if the General Partner elects to cause the Partnership to
acquire any of the Series I Preferred Units then outstanding, (1) certificates
representing the Series I Preferred Shares being issued in exchange for the
Series I Preferred Units of such holder being exchanged and (2) a written notice
(a "Series I Redemption Notice") stating (A) the redemption date, which may be
the date of such Series I Redemption Notice or any other date which is not later
than sixty (60) days following the receipt of the Series I Exchange Notice, (B)
the redemption price, (C) the place or places where the Series I Preferred Units
are to be surrendered and (D) that distributions on the Series I Preferred Units
will cease to accrue on such redemption date, or (b) if the General Partner
elects to cause the Partnership to redeem all of the Series I Preferred Units
then outstanding in exchange for cash, a Series I Redemption Notice. Series I
Preferred Units which are redeemed shall be deemed canceled (and any
corresponding Partnership Interest represented thereby deemed terminated) on the
redemption date. Holders of Series I Preferred Units shall deliver any canceled
certificates representing Series I Preferred Units which have been exchanged or
redeemed to the office of the General Partner (which currently is located at
Pier 1, Bay 1, San Francisco, California 94111) within ten (10) Business Days of
the exchange or redemption with respect thereto. Notwithstanding anything to the
contrary contained herein, any and all Series I Preferred Units to be exchanged
for Series I Preferred Shares pursuant to this Section 22.8 shall be so
exchanged in a single transaction at one time. As a condition to exchange, AMB
may require the holders of Series I Preferred Units to make such representations
as may be reasonably necessary for the General Partner to establish that the
issuance of Series I Preferred Shares pursuant to the exchange shall not be
required to be registered under the Securities Act or any state securities laws.
Any Series I Preferred Shares issued pursuant to this Section 22.8 shall be
delivered as shares which are duly authorized, validly issued, fully paid and
nonassessable, free of any pledge, lien, encumbrance or restriction other than
those provided in the REIT Charter, the Bylaws of AMB, the Securities Act and
relevant state securities or blue sky laws.

              The certificates representing the Series I Preferred Shares issued
upon exchange of the Series I Preferred Units shall contain the following
legend:

              THE SHARES REPRESENTED BY THIS CERTIFICATE MAY NOT BE TRANSFERRED,
              SOLD, ASSIGNED, PLEDGED, HYPOTHECATED OR OTHERWISE DISPOSED OF
              EXCEPT (A) PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER
              THE SECURITIES ACT OF 1933, AS AMENDED (THE "ACT"), AND STATE
              SECURITIES LAWS OR (B) IF THE CORPORATION HAS BEEN FURNISHED WITH
              A SATISFACTORY OPINION OF COUNSEL FOR THE HOLDER OF THE SHARES
              REPRESENTED HEREBY, OR OTHER EVIDENCE SATISFACTORY TO THE
              CORPORATION, THAT SUCH TRANSFER, SALE,

                                      149
<PAGE>   155

              ASSIGNMENT, PLEDGE, HYPOTHECATION OR OTHER DISPOSITION IS EXEMPT
              FROM THE PROVISIONS OF SECTION 5 OF THE ACT AND STATE SECURITIES
              LAWS AND THE RULES AND REGULATIONS THEREUNDER.

              (ii) In the event of an exchange of Series I Preferred Units for
Series I Preferred Shares, an amount equal to the accrued and unpaid
distributions to the date of exchange on any Series I Preferred Units tendered
for exchange shall (i) accrue on the Series I Preferred Shares into which such
Series I Preferred Units are exchanged, and (ii) continue to accrue on such
Series I Preferred Units, which shall remain outstanding following such
exchange, with the General Partner as the holder of such Series I Preferred
Units. Notwithstanding anything to the contrary set forth herein, in no event
shall a Holder of a Series I Preferred Unit that was validly exchanged for
Series I Preferred Shares pursuant to this Section (other than the General
Partner holding such Series I Preferred Unit following any such exchange),
receive a distribution out of Available Cash of the Partnership, if such Holder,
after exchange, is entitled to receive a distribution with respect to the Series
I Preferred Shares for which such Series I Preferred Unit was exchanged or
redeemed. Further, for purposes of the foregoing, in the event of an exchange of
Series I Preferred Units for Series I Preferred Shares, if the accrued and
unpaid distributions per Series I Preferred Unit is not the same for each Series
I Preferred Unit, the accrued and unpaid distributions per Series I Preferred
Unit for each such Series I Preferred Unit shall be equal to the greatest amount
of such accrued and unpaid distributions per Series I Preferred Unit on any such
unit.

              (iii) Fractional Series I Preferred Shares are not to be issued
upon exchange but, in lieu thereof, the General Partner will pay a cash
adjustment based upon the fair market value of the Series I Preferred Shares on
the day prior to the exchange date as determined in good faith by the board of
directors of the General Partner.

              C. Adjustment of Series I Exchange Price. In case AMB shall be a
party to any transaction (including, without limitation, a merger,
consolidation, statutory share exchange, tender offer for all or substantially
all of AMB's capital stock or sale of all or substantially all of AMB's assets),
in each case as a result of which the Series I Preferred Shares will be
converted into the right to receive shares of capital stock, other securities or
other property (including cash or any combination thereof), each Series I
Preferred Unit will thereafter be exchangeable into the kind and amount of
shares of capital stock and other securities and property receivable (including
cash or any combination thereof) upon the consummation of such transaction by a
holder of that number of Series I Preferred Shares or fraction thereof into
which one Series I Preferred Unit was exchangeable immediately prior to such
transaction. AMB may not become a party to any such transaction unless the terms
thereof are consistent with the foregoing. AMB and the Operating Partnership
further agree that, notwithstanding any transaction to which either may be a
party (including, without limitation, any merger, consolidation, statutory share
exchange, tender offer for all or substantially all of such entity's capital
stock or partnership interests or sale of all or substantially all of such
entity's assets), immediately following any such transaction, the issuer or
issuers of any shares of capital stock and other securities into which the
Series I Preferred Units shall be exchangeable pursuant to this Section 22.8
shall be the same issuer or issuers of shares of capital stock and other
securities into which (i) the Series B Preferred Units are then

                                      150
<PAGE>   156

exchangeable (or, if the Series B Preferred Units have previously been redeemed
in full, would have been then exchangeable if then still outstanding), (ii) the
Series C Preferred Units are then exchangeable (or, if the Series C Preferred
Units have previously been redeemed in full, would have been then exchangeable
if then still outstanding), (iii) the Series D Preferred Units are then
exchangeable (or, if the Series D Preferred Units have previously been redeemed
in full, would have been then exchangeable if then still outstanding), (iv) the
Series E Preferred Units are then exchangeable (or, if the Series E Preferred
Units have previously been redeemed in full, would have been then exchangeable
if then still outstanding), (v) the Series F Preferred Units are then
exchangeable (or, if the Series F Preferred Units have previously been redeemed
in full, would have been then exchangeable if then still outstanding), (vi) the
Series G Preferred Units are then exchangeable (or, if the Series G Preferred
Units have previously been redeemed in full, would have been then exchangeable
if then still outstanding) and (vii) the Series H Preferred Units are then
exchangeable (or, if the Series H Preferred Units have previously been redeemed
in full, would have been then exchangeable if then still outstanding).

              Section 22.9. No Conversion Rights

              The Series I Preferred Units shall not be convertible into any
other class or series of interest in the Partnership.

              Section 22.10.No Sinking Fund

              No sinking fund shall be established for the retirement or
redemption of Series I Preferred Units.

                            (Signature Pages Follow)

                                      151
<PAGE>   157

              IN WITNESS WHEREOF, the parties hereto have executed this
Agreement as of the date first above written.

                         GENERAL PARTNER:

                         AMB PROPERTY HOLDING CORPORATION,
                         a Maryland corporation

                         By:/s/ Michael A. Coke
                            ----------------------------------------------------
                            Michael A. Coke
                            Executive Vice President and Chief Financial Officer

                         COMMON LIMITED PARTNER:

                         AMB PROPERTY, L.P., a Delaware limited partnership

                         By: AMB Property Corporation,
                             its general partner

                         By:/s/ Michael A. Coke
                            ----------------------------------------------------
                            Michael A. Coke
                            Executive Vice President and Chief Financial Officer

                         GENERAL PARTNER OF COMMON LIMITED PARTNER:

                         AMB PROPERTY CORPORATION,
                         a Maryland corporation

                         By:  /s/ Michael A. Coke
                            ----------------------------------------------------
                            Michael A. Coke
                            Executive Vice President and Chief Financial Officer

                                      S-1
<PAGE>   158

                            SERIES I LIMITED PARTNER:

                            J.P. MORGAN CHASE MOSAIC FUND V, LLC

                            By:  J.P. Morgan Private Investments Inc., as
                                 manager of J.P. Morgan Chase Mosaic Fund V, LLC

                            By:  /s/ Patrick L. DeGraca
                                 -----------------------------------------------
                                 Name:  Patrick L. DeGraca
                                 Title:  Vice President

                                      S-2
<PAGE>   159

                                    EXHIBIT A

               PARTNERS, CONTRIBUTIONS, AND PARTNERSHIP INTERESTS

I.  COMMON UNITS

<TABLE>
<CAPTION>
                                                                  Agreed Value of
                                   Contribution        Cash         Contributed            Total        Partnership    Percentage
Name of Partner                        Date        Contribution       Property         Contributions       Units        Interest
---------------                    ------------    ------------   ---------------      -------------    -----------    ----------
<S>                                <C>             <C>            <C>                  <C>              <C>            <C>
GENERAL PARTNER:
AMB Property Holding Corporation      11/26/97          --          $  3,626,023        $  3,626,023        172,668      .99725%

LIMITED PARTNERS:
AMB Property, L.P.                    11/26/97          --          $358,976,301        $358,976,301     17,094,110    98.72782%
                                      06/30/98          --          $  1,161,489        $  1,161,489         47,602      .27493%

                                                    ----------      ------------        ------------     ----------    ---------
     TOTAL COMMON UNITS                                 --          $363,763,813        $363,763,813     17,314,380    100.0000%
                                                    ----------      ------------        ------------     ----------    ---------
</TABLE>

                                      A-1
<PAGE>   160

                                    EXHIBIT A

               PARTNERS, CONTRIBUTIONS, AND PARTNERSHIP INTERESTS

 II.  SERIES C PREFERRED UNITS

<TABLE>
<CAPTION>
                                                                 Agreed Value of                        Series C
                               Contribution       Cash             Contributed         Total           Partnership       Percentage
Name of Partner                    Date       Contributions         Property       Contributions          Units           Interest
--------------------------     ------------   -------------      --------------    -------------       -----------       ----------
<S>                            <C>            <C>                <C>               <C>                 <C>               <C>
LIMITED PARTNER:
Belcrest Realty
  Corporation                    11/24/98      $ 24,000,000                --      $ 24,000,000           480,000         21.81818%
Belair Real Estate
  Corporation                    11/24/98      $ 86,000,000                --      $ 86,000,000         1,720,000         78.18182%
Belcrest Realty
  Corporation                     2/23/99                --                --                --           381,000         17.31818%
Belair Real Estate
  Corporation                     2/23/99                --                --                --          (381,000)       (17.31818%)
Belcrest Realty
  Corporation                     4/29/99                --                --                --           239,000         10.86364%
Belair Real Estate
  Corporation                     4/29/99                --                --                --          (239,000)       (10.86364%)
Argosy Realty Corporation          7/9/99                --                --                --            32,506          1.47755%
Belmar Realty Corporation          7/9/99                --                --                --            32,506          1.47755%
Belport Realty Corporation         7/9/99                --                --                --            32,506          1.47755%
Belrieve Realty
  Corporation                      7/9/99                --                --                --            32,506          1.47755%
Belair Real Estate
  Corporation                      7/9/99                --                --                --          (130,024)        (5.91018%)
Belcrest Realty
  Corporation                     7/28/99                --                --                --           300,000         13.63636%
Belair Real Estate
  Corporation                     7/28/99                --                --                --          (300,000)       (13.63636%)
Belmar Realty Corporation         3/17/00                --                --                --           (32,506)        (1.47755%)
Belcrest Realty
  Corporation                     3/17/00                --                --                --          (250,000)       (11.36364%)
Belair Real Estate
  Corporation                     3/17/00                --                --                --           282,506         12.84118%
Belair Real Estate
  Corporation                    12/19/00                --                --                --            32,506          1.47755%
                                 --------      ------------        ----------      ------------         ---------        ----------
Altavera Realty Corporation,     12/19/00                --                --                --           (32,506)        (1.47755%)
formerly known as Belrieve Realty
Corporation
                                               ============        ==========      ============         =========        ==========
Belport Realty Corporation        3/14/01                --                --                --           (32,506)        (1.47755%)
                                               ============        ==========      ============         =========        ==========
Belaire Real Estate
Corporation                       3/14/01                --                --                --            32,506          1.47755%
                                               ============        ==========      ============         =========        ==========
     TOTAL SERIES C   PREFERRED UNITS          $110,000,000                --      $110,000,000         2,200,000         100.0000%
                                               ============        ==========      ============         =========        ==========
</TABLE>

 III.  SERIES D PREFERRED UNITS

<TABLE>
<CAPTION>
                                                             Agreed Value of                      Series D
                              Contribution         Cash        Contributed        Total          Partnership      Percentage
Name of Partner                   Date        Contributions     Property      Contributions         Units          Interest
---------------------------   ------------    -------------  ---------------  -------------      -----------      ----------
<S>                           <C>             <C>            <C>              <C>                <C>              <C>
LIMITED PARTNER:
J.P. Morgan Mosaic Fund, LLC     5/5/99        $79,766,850         --           $79,766,850        1,595,337       100.0000%
                                              ------------   --------------     -----------        ---------       ---------

  TOTAL SERIES D PREFERRED UNITS               $79,766,850         --           $79,766,850        1,595,337       100.0000%
                                              ============   ==============     ===========        =========       =========
</TABLE>

 IV.  SERIES E PREFERRED UNITS

<TABLE>
<CAPTION>
                                                             Agreed Value of                      Series E
                              Contribution         Cash        Contributed        Total          Partnership      Percentage
Name of Partner                   Date        Contributions      Property     Contributions         Units          Interest
---------------------------   ------------    -------------  ---------------  -------------      -----------      ----------
<S>                           <C>             <C>            <C>              <C>                <C>              <C>
LIMITED PARTNER:
Fifth Third Equity
Exchange Fund 1999, LLC          8/31/99       $11,022,000         --           $11,022,000          220,440       100.0000%

                                              ------------   --------------     -----------        ---------       ---------
  TOTAL SERIES E PREFERRED UNITS               $11,022,000         --           $11,022,000          220,440       100.0000%
                                              ============   ==============     ===========        =========       =========
</TABLE>

 V.  SERIES F PREFERRED UNITS

<TABLE>
<CAPTION>
                                                             Agreed Value of                     Series F
                              Contribution         Cash        Contributed        Total          Partnership      Percentage
Name of Partner                   Date        Contributions     Property      Contributions         Units          Interest
---------------------------   ------------    -------------  ---------------  -------------      -----------      ----------
<S>                           <C>             <C>            <C>              <C>                <C>              <C>
LIMITED PARTNER:
</TABLE>

                                      A-2
<PAGE>   161

<TABLE>
<S>                              <C>          <C>            <C>                <C>                <C>             <C>
Bailard, Biehl & Kaiser
Technology Exchange Fund, LLC    3/22/00       $19,871,950         --           $19,871,950          397,439       100.0000%

                                              ------------   --------------     -----------        ---------       ---------
  TOTAL SERIES F PREFERRED UNITS               $19,871,950         --           $19,871,950          397,439       100.0000%
                                              ============   ==============     ===========        =========       =========
</TABLE>

                                      A-2
<PAGE>   162

 VI.  SERIES G PREFERRED UNITS

<TABLE>
<CAPTION>
                                                             Agreed Value of                      Series G
                              Contribution        Cash         Contributed        Total          Partnership      Percentage
Name of Partner                   Date        Contributions     Property      Contributions         Units          Interest
---------------------------   ------------    -------------  ---------------  -------------      -----------      ----------
<S>                           <C>             <C>            <C>              <C>                <C>              <C>
LIMITED PARTNER:
Bailard, Biehl & Kaiser
Technology Exchange Fund, LLC    8/29/00        $1,000,000         --            $1,000,000           20,000       100.0000%

                                              ------------   --------------     -----------        ---------       ---------
  TOTAL SERIES G PREFERRED UNITS                $1,000,000         --            $1,000,000           20,000       100.0000%
                                              ============   ==============     ===========        =========       =========
</TABLE>

 VII.  SERIES H PREFERRED UNITS

<TABLE>
<CAPTION>
                                                             Agreed Value of                      Series H
                              Contribution         Cash        Contributed        Total          Partnership      Percentage
Name of Partner                   Date        Contributions      Property     Contributions         Units          Interest
---------------------------   ------------    -------------  ---------------  -------------      -----------      ----------
<S>                           <C>             <C>            <C>              <C>                <C>              <C>
LIMITED PARTNER:
J.P. Morgan Mosaic Fund
IV, LLC                          9/1/00        $42,000,000          --          $42,000,000          840,000       100.0000%
                                              ------------   --------------     -----------        ---------       ---------

  TOTAL SERIES G PREFERRED UNITS               $42,000,000          --          $42,000,000          840,000       100.0000%
                                              ============   ==============     ===========        =========       =========
</TABLE>

 VIII.  SERIES I PREFERRED UNITS

<TABLE>
<CAPTION>
                                                             Agreed Value of                      Series I
                              Contribution         Cash        Contributed        Total          Partnership      Percentage
Name of Partner                   Date        Contributions      Property     Contributions         Units          Interest
---------------------------   ------------    -------------  ---------------  -------------      -----------      ----------
<S>                           <C>             <C>            <C>              <C>                <C>              <C>
LIMITED PARTNER:
J.P. Morgan Chase Mosaic
Fund V, LLC                      3/21/01       $25,500,000         --           $25,500,000          510,000       100.0000%

                                              ------------   --------------    ------------        ---------       ---------
  TOTAL SERIES I PREFERRED UNITS              $25,500,000          --           $25,500,000          510,000       100.0000%
                                              ============   ==============    ============        =========       =========

                                              ------------   --------------    ------------        ---------       ---------
  TOTAL ALL SERIES OF PREFERRED UNITS         $269,288,850         --          $269,288,850        5,385,777       100.0000%
                                              ============   ==============    ============        =========       =========
</TABLE>

                                      A-2
<PAGE>   163

                                    EXHIBIT B

                              NOTICE OF REDEMPTION

              The undersigned hereby irrevocably (i) exchanges ____________
Limited Partnership Units in AMB Property II, L.P. in accordance with the terms
of the Limited Partnership Agreement of AMB Property II, L.P. dated as of
_________________, as amended, and the rights of Series G Redemption referred to
therein, (ii) surrenders such Limited Partnership Units and all right, title and
interest therein and (iii) directs that the cash (or, if applicable, Preferred
Stock) deliverable upon Series H Redemption or exchange be delivered to the
address specified below, and if applicable, that such Preferred Stock be
registered or placed in the name(s) and at the address(es) specified below.

Dated:
      --------------------------------
      Name of Limited Partner:

                                               ---------------------------------
                                               (Signature of Limited Partner)

                                               ---------------------------------
                                               (Street Address)

                                               ---------------------------------
                                               (City) (State) (Zip Code)

                                               Signature Guaranteed by:

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

Issue Shares in the name of:

Please insert social security or identifying number:

Address (if different than above):

                                      B-1
<PAGE>   164

                                    EXHIBIT C

                        CONSTRUCTIVE OWNERSHIP DEFINITION

              The term "Constructively Owns" means ownership determined through
the application of the constructive ownership rules of Section 318 of the Code,
as modified by Section 856(d)(5) of the Code. Generally, these rules provide the
following:

       a. an individual is considered as owning the Ownership Interest that is
owned, actually or constructively, by or for his spouse, his children, his
grandchildren, and his parents;

       b. an Ownership Interest that is owned, actually or constructively, by or
for a partnership, limited liability company or estate is considered as owned
proportionately by its partners, members or beneficiaries;

       c. an Ownership Interest that is owned, actually or constructively, by or
for a trust is considered as owned by its beneficiaries in proportion to the
actuarial interest of such beneficiaries (provided, however, that in the case of
a "grantor trust" the Ownership Interest will be considered as owned by the
grantors);

       d. if ten percent (10%) or more in value of the stock in a corporation is
owned, actually or constructively, by or for any person, such person shall be
considered as owning the Ownership Interest that is owned, actually or
constructively, by or for such corporation in that proportion which the value of
the stock which such person so owns bears to the value of all the stock in such
corporation;

       e. an Ownership Interest that is owned, actually or constructively, by or
for a partner or member which actually or constructively owns a 25% or greater
capital interest or profits interest in a partnership or limited liability
company, or by or for a beneficiary of an estate or trust, shall be considered
as owned by the partnership, limited liability company, estate, or trust (or, in
the case of a grantor trust, the grantors);

       f. if ten percent (10%) or more in value of the stock in a corporation is
owned, actually or constructively, by or for any person, such corporation shall
be considered as owning the Ownership Interest that is owned, actually or
constructively, by or for such person;

       g. if any person has an option to acquire an Ownership Interest
(including an option to acquire an option or any one of a series of such
options), such Ownership Interest shall be considered as owned by such person;

       h. an Ownership Interest that is constructively owned by a person by
reason of the application of the rules described in paragraphs (a) through (g)
above shall, for purposes of applying paragraphs (a) through (g), be considered
as actually owned by such person provided, however, that (i) an Ownership
Interest constructively owned by an individual by reason of paragraph (a) shall
not be considered as owned by him for purposes of again applying paragraph (a)
in order to make another the constructive owner of such Ownership Interest, (ii)
an Ownership Interest constructively owned by a partnership, estate, trust, or
corporation by reason of the application of paragraphs (e) or (f) shall not be
considered as owned by it for purposes of applying paragraphs (b), (c), or (d)
in order to make another the constructive owner of such Ownership Interest,
(iii) if an Ownership Interest may be considered as owned by an individual under
paragraphs (a) or (g), it shall be considered as owned by him under paragraph
(g) and (iv) for purposes of the above described rules, an S corporation shall
be treated as a partnership and any stockholder of the S corporation shall be
treated as a partner of such partnership except that this rule shall not apply
for purposes of determining whether stock in the S corporation is constructively
owned by any person.

       i. For purposes of the above summary of the constructive ownership rules,
the term "Ownership Interest" means the ownership of stock with respect to a
corporation and, with respect to any other type of entity, the ownership of an
interest in either its assets or net profits.

                                      C-1
<PAGE>   165

                                   EXHIBIT D-1

                      FORM OF PARTNERSHIP UNIT CERTIFICATE

                      CERTIFICATE FOR PARTNERSHIP UNITS OF

                              AMB PROPERTY II, L.P.

No. _______________                                           ____________ UNITS

              AMB Property Holding Corporation as the General Partner of AMB
Property II, L.P., a Delaware limited partnership (the "Operating Partnership"),
hereby certifies that ____________________________is a Limited Partner of the
Operating Partnership whose Partnership Interests therein, as set forth in the
Agreement of Limited Partnership of AMB Property II, L.P., dated as of
______________, 2000 (as it may be amended, modified or supplemented from time
to time in accordance with its terms, (the "Partnership Agreement"), under which
the Operating Partnership is existing and as filed in the office of the Delaware
[State Department of Assessments and Taxation] (copies of which are on file at
the Operating Partnership's principal office at
__________________________________________________, represent _____________
units of limited partnership interest in the Operating Partnership (the
"Partnership Units").

              THE PARTNERSHIP UNITS REPRESENTED BY THIS CERTIFICATE OR
INSTRUMENT MAY NOT BE TRANSFERRED, SOLD, ASSIGNED, PLEDGED, HYPOTHECATED OR
OTHERWISE DISPOSED OF UNLESS SUCH TRANSFER, SALE, ASSIGNMENT, PLEDGE,
HYPOTHECATION OR OTHER DISPOSITION COMPLIES WITH THE PROVISIONS OF THE
PARTNERSHIP AGREEMENT (A COPY OF WHICH IS ON FILE WITH THE OPERATING
PARTNERSHIP). EXCEPT AS OTHERWISE PROVIDED IN THE PARTNERSHIP AGREEMENT, NO
TRANSFER, SALE, ASSIGNMENT, PLEDGE, HYPOTHECATION OR OTHER DISPOSITION OF THE
PARTNERSHIP UNITS REPRESENTED BY THIS CERTIFICATE MAY BE MADE EXCEPT (A)
PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF
1933, AS AMENDED (THE "ACT"), OR (B) IF THE OPERATING PARTNERSHIP HAS BEEN
FURNISHED WITH A SATISFACTORY OPINION OF COUNSEL FOR THE HOLDER OF THE
PARTNERSHIP UNITS REPRESENTED BY THIS CERTIFICATE THAT SUCH TRANSFER, SALE
ASSIGNMENT, PLEDGE, HYPOTHECATION OR OTHER DISPOSITION IS EXEMPT FROM THE
PROVISIONS OF SECTION 5 OF THE ACT AND THE RULES AND REGULATIONS IN EFFECT
THEREUNDER.

DATED: __________________, 2001.

                                        AMB PROPERTY HOLDING CORPORATION

                                        General Partner of
                                        AMB Property II, L.P.

ATTEST:
By:                                     By:
   ---------------------------------       -------------------------------------

                                      D-2
<PAGE>   166

                                    EXHIBIT E

                         SCHEDULE OF PARTNERS' OWNERSHIP

                             WITH RESPECT TO TENANTS

                                      None

                                      E-1
<PAGE>   167

                                    EXHIBIT F

                             SCHEDULE OF REIT SHARES

            ACTUALLY OR CONSTRUCTIVELY OWNED BY 25% LIMITED PARTNERS

                OTHER THAN THOSE ACQUIRED PURSUANT TO AN EXCHANGE

                                      None

                                      F-1
<PAGE>   168

                                    EXHIBIT G

                   SCHEDULE OF CERTAIN AGREEMENTS RELATING TO

                   PROPERTIES WITH RESTRICTIONS ON DISPOSITION

                            PURSUANT TO SECTION 7.3.F

1.     APLP II Contribution Agreement dated as of May 21, 1998, by and between
       Hayes Realty Company, an Illinois general partnership and AMB Property
       II, L.P., a Delaware limited partnership.

                                      G-1
<PAGE>   169

                                    EXHIBIT H

                    SCHEDULE OF CERTAIN AGREEMENTS CONTAINING

                LIMITATIONS ON GENERAL PARTNERS GENERAL AUTHORITY

1.     APLP II Contribution Agreement dated as of May 21, 1998, by and between
       Hayes Realty Company, an Illinois general partnership and AMB Property
       II, L.P., a Delaware limited partnership.

                                      H-1
<PAGE>   170

                                    EXHIBIT I

         RESTRICTIONS ON OWNERSHIP AND TRANSFER TO PRESERVE TAX BENEFIT

       (a) Definitions. for the purposes of this Exhibit I, the following terms
shall have the following meanings:

                     "Charitable Beneficiary" shall mean one or more
              beneficiaries of a Trust, as determined pursuant to subsection
              (c)(vi), each of which shall be an organization described in
              Sections 170(b)(1)(A), 170(c)(2) and 501(c)(3) of the Code.

                     "Code" shall mean the Internal Revenue Code of 1986, as
              amended.

                     "Constructive Ownership" shall mean ownership of
              Partnership Units by a Person who is or would be treated as an
              owner of such Partnership Units either actually or constructively
              through the application of Section 318 of the Code, as modified by
              Section 856(d)(5) of the Code. The terms "Constructive Owner,"
              "Constructively Owns" and "Constructively Owned" shall have the
              correlative meanings.

                     "Exempted Person" shall mean any Person exempted from time
              to time by the General Partner in its sole and absolute
              discretion. The Operating Partnership shall be considered an
              Exempted Person.

                     "Market Price" shall mean the market price of the
              Partnership Units on the relevant date as determined in good faith
              by the General Partner; provided, however, if AMB has outstanding
              shares of capital stock which correspond to such Partnership Units
              (i.e., the Series C Preferred Shares), the Market Price of each
              such Partnership Unit shall be equal to the Value of a share of
              such capital stock, subject to adjustment if the right to exchange
              such Partnership Units for such stock is other than one to one.

                     "Ownership Limit" shall mean 24.9% of the capital or
              profits interests of the Partnership.

                     "Person" shall mean an individual, corporation,
              partnership, limited liability company, estate, trust (including a
              trust qualified under Section 401(a) or 501(c)(17) of the Code), a
              portion of a trust permanently set aside for or to be used
              exclusively for the purposes described in Section 642(c) of the
              Code, association, private foundation within the meaning of
              Section 509(a) of the Code, joint stock company or other entity.

                                      I-1
<PAGE>   171

                     "Purported Beneficial Transferee" shall mean, with respect
              to any purported Transfer (or other event) which results in a
              transfer to a Trust, as provided in subsection (b)(ii), the
              Purported Record Transferee, unless the Purported Record
              Transferee would have acquired or owned Partnership Units for
              another Person who is the beneficial transferee or owner of such
              Partnership Units, in which case the Purported Beneficial
              Transferee shall be such Person.

                     "Purported Record Transferee" shall mean, with respect to
              any purported Transfer (or other event) which results in a
              transfer to a Trust, as provided in subsection (b)(ii), the holder
              of the Partnership Units as set forth or to be set forth in
              Exhibit A to the Partnership Agreement, and any Assignee of such
              Partnership Units, if such Transfer or ownership had been valid
              under subsection (b)(i).

                     "Restriction Termination Date" shall mean the first day
              after the date hereof on which the General Partner determines, in
              its sole and absolute discretion, that compliance with subsection
              (b)(i) is no longer necessary or advisable.

                     "Transfer" shall mean any sale, transfer, gift, assignment,
              devise or other disposition of Partnership Units, (including (i)
              the granting of any option or entering into any agreement for the
              sale, transfer or other disposition of Partnership Units or (ii)
              the sale, transfer, assignment or other disposition of any
              securities (or rights convertible into or exchangeable for
              Partnership Units)), whether voluntary or involuntary, whether
              such transfer has occurred of record or beneficially or
              Constructively (including but not limited to transfers of
              interests in other entities which results in changes in
              Constructive Ownership of Partnership Units), and whether such
              transfer has occurred by operation of law or otherwise.

                     "Trust" shall mean each of the trusts provided for in
              subsection (c).

                     "Trustee" shall mean any Person unaffiliated with the
              Partnership, or a Purported Beneficial Transferee, or a Purported
              Record Transferee, that is appointed by the Partnership to serve
              as trustee of a Trust.

Capitalized terms used and not defined herein shall have the meanings ascribed
to them in the Third Amended and Restated Agreement of Limited Partnership of
AMB Property II, L.P. (the "Partnership Agreement"), as such agreement may be
amended from time to time. All references to "Section" refer to the Partnership
Agreement.

       (b) Restriction on Ownership and Transfers.

              (i) Prior to the Restriction Termination Date, no Person, other
than an Exempted Person, shall at any time Constructively Own Partnership Units
in excess of the

                                      I-2
<PAGE>   172

Ownership Limit if the representations contained in Section 3.4.D are not at
such time true and correct.

              (ii) If, prior to the Restriction Termination Date, any Transfer
or other event occurs that, if effective, would result in any Person
Constructively Owning Partnership Units in violation of subsection (b)(i), (1)
then that number of Partnership Units that otherwise would cause such Person to
violate subsection (b)(i) (rounded up to the nearest whole Partnership Unit)
shall be automatically transferred (provided such Transfer is not in violation
of the restrictions on transfer set forth in the Partnership Agreement, except
to the extent the General Partner waives such restrictions) to a Trust for the
benefit of a Charitable Beneficiary, as described in subsection (c), effective
as of the close of business on the business day prior to the date of such
Transfer or other event, and such Purported Beneficial Transferee shall
thereafter have no rights in such Partnership Units or (2) if, for any reason,
the transfer to the Trust described in clause (1) of this sentence is not
automatically effective as provided therein to prevent any Person from
Constructively Owning Partnership Units in violation of subsection (b)(i), then
the Transfer of that number of Partnership Units that otherwise would cause any
Person to violate subsection (b)(i) shall be void ab initio, and the Purported
Beneficial Transferee shall have no rights in such Partnership Units.

       (c) Transfers of Partnership Units in Trust.

              (i) Upon any purported Transfer or other event described in
subsection (b)(ii), such Partnership Units shall be deemed to have been
transferred to the Trustee in his capacity as trustee of a Trust for the
exclusive benefit of one or more Charitable Beneficiaries. Such transfer to the
Trustee shall be deemed to be effective as of the close of business on the
business day prior to the purported Transfer or other event that results in a
transfer to the Trust pursuant to subsection (b)(ii). The Trustee shall be
appointed by the Partnership and shall be a Person unaffiliated with the
Partnership, any Purported Beneficial Transferee, or any Purported Record
Transferee. Each Charitable Beneficiary shall be designated by the Partnership
as provided in subsection (c)(vi).

              (ii) Partnership Units held by the Trustee shall be issued and
outstanding Partnership Units of the Partnership. The Purported Beneficial
Transferee or Purported Record Transferee shall have no rights in the
Partnership Units held by the Trustee. The Purported Beneficial Transferee or
Purported Record Transferee shall not benefit economically from ownership of any
Partnership Units held in trust by the Trustee, shall have no rights to
distributions or allocations with respect to Partnership Units held in the Trust
and shall not possess any rights to vote or other rights attributable to the
Partnership Units held in the Trust.

              (iii) The Trustee shall have all voting rights and rights to
distributions and allocations with respect to Partnership Units held in the
Trust, which rights shall be exercised for the exclusive benefit of the
Charitable Beneficiary. Any distribution paid prior to the discovery by the
Partnership that Partnership Units have been transferred to the Trustee shall be
paid to the Trustee upon demand, and any distribution with respect to such
Partnership Units shall be paid

                                      I-3
<PAGE>   173

when due to the Trustee. Any distributions so paid over to the Trustee shall be
held in trust for the Charitable Beneficiary.

              The Purported Record Transferee and Purported Beneficial
Transferee shall have no voting rights with respect to the Partnership Units
held in the Trust and, subject to Delaware law, effective as of the date the
Partnership Units has been transferred to the Trustee, the Trustee shall have
the authority (at the Trustee's sole discretion) (i) to rescind as void any vote
cast by a Purported Record Transferee with respect to such Partnership Units
prior to the discovery by the Partnership that the Partnership Units has been
transferred to the Trustee and (ii) to recast such vote in accordance with the
desires of the Trustee acting for the benefit of the Charitable Beneficiary;
provided, however, that if the Partnership has already taken irreversible
action, then the Trustee shall not have the authority to rescind and recast such
vote. Notwithstanding any other provision of this Exhibit I to the contrary,
until the Partnership has received notification that the Partnership Units have
been transferred into a Trust, the Partnership shall be entitled to rely on its
Partnership Unit transfer and other unitholder records for purposes of preparing
Exhibit A to the Partnership Agreement, lists of unitholders entitled to vote at
meetings, and otherwise conducting votes of Partners.

              (iv) Within 20 days of receiving notice from the Partnership that
Partnership Units have been transferred to the Trust, the Trustee of the Trust
shall, in accordance with the terms of (and subject to the limitations contained
in) the Partnership Agreement, sell the Partnership Units held in the Trust to a
Person, designated by the Trustee, whose ownership of the Partnership Units will
not violate the ownership limitations set forth in subsection (b)(i). Upon such
sale, the interest of the Charitable Beneficiary in the Partnership Units sold
shall terminate and the Trustee shall distribute the net proceeds of the sale to
the Purported Record Transferee and to the Charitable Beneficiary as provided in
this subsection (c)(iv). The Purported Record Transferee shall receive the
lesser of (1) the price paid by the Purported Record Transferee for the
Partnership Units in the transaction that resulted in such transfer to the Trust
(or, if the event which resulted in the transfer to the Trust did not involve a
purchase of such Partnership Units at Market Price, the Market Price of such
Partnership Units on the day of the event which resulted in the transfer of such
Partnership Units to the Trust) and (2) the price per Partnership Unit received
by the Trustee (net of any commissions and other expenses of sale) from the sale
or other disposition of the Partnership Units held in the Trust. Any net sales
proceeds in excess of the amount payable to the Purported Record Transferee
shall be immediately paid to the Charitable Beneficiary together with any
distributions thereon. If, prior to the discovery by the Partnership that
Partnership Units have been transferred to the Trustee, such Partnership Units
are sold by a Purported Record Transferee then (i) such Partnership Units shall
be deemed to have been sold on behalf of the Trust and (ii) to the extent that
the Purported Record Transferee received an amount for such Partnership Units
that exceeds the amount that such Purported Record Transferee was entitled to
receive pursuant to this subsection (c)(iv), such excess shall be paid to the
Trustee upon demand. The expenses described in item (2) above shall include any
expenses of administering the Trust, any transfer of Partnership Units

                                      I-4
<PAGE>   174

thereto or disposition of Partnership Units thereby, which shall be allocated
equitably among the Partnership Units which are transferred to the Trust.

              (v) Partnership Units transferred to the Trustee shall be deemed
to have been offered for sale to the Partnership, or its designee, at a price
per Partnership Unit equal to the lesser of (i) the price paid by the Purported
Record Transferee for the Partnership Units in the transaction that resulted in
such transfer to the Trust (or, if the event which resulted in the transfer to
the Trust did not involve a purchase of such Partnership Units at Market Price,
the Market Price of such Partnership Units on the day of the event which
resulted in the transfer of such Partnership Units to the Trust) and (ii) the
Market Price on the date the Partnership, or its designee, accepts such offer.
The Partnership shall have the right to accept such offer until the Trustee has
sold the Partnership Units held in the Trust pursuant to subsection (c)(iv).
Upon such a sale to the Partnership, the interest of the Charitable Beneficiary
in the Partnership Units sold shall terminate and the Trustee shall distribute
the net proceeds of the sale to the Purported Record Transferee and any
distributions held by the Trustee with respect to such Partnership Units shall
thereupon be paid to the Charitable Beneficiary.

              (vi) By written notice to the Trustee, the Partnership shall
designate one or more nonprofit organizations to be the Charitable Beneficiary
of the interest in the Trust such that the Partnership Units held in the Trust
would not violate the restrictions set forth in subsection (b)(i) in the hands
of such Charitable Beneficiary.

       (d) Remedies For Breach. If the General Partner shall at any time
determine in good faith that a Transfer or other event has taken place in
violation of subsection (b) or that a Person intends to acquire, has attempted
to acquire or may acquire beneficial ownership (determined without reference to
any rules of attribution) or Constructive Ownership of any Partnership Units of
the Partnership in violation of subsection (b), the General Partner shall take
such action as it deems advisable to refuse to give effect or to prevent such
Transfer, including, but not limited to, causing the Partnership to redeem
Partnership Units, refusing to give effect to such Transfer on the books of the
Partnership or instituting proceedings to enjoin such Transfer; provided,
however, that any Transfers (or, in the case of events other than a Transfer,
ownership or Constructive Ownership) in violation of subsection (b)(i), shall
automatically result in the transfer to a Trust as described in subsection
(b)(ii).

       (e) Notice of Restricted Transfer. Any Person who acquires or attempts to
acquire or own Partnership Units in violation of subsection (b), or any Person
who is a Purported Beneficial Transferee such that an automatic transfer to a
Trust results under subsection (b)(ii), shall immediately give written notice to
the Partnership of such event and shall provide to the Partnership such other
information as the Partnership may request in order to determine the effect, if
any, of such Transfer or attempted Transfer on such Person's compliance with
subsection (b)(i).

                                      I-5
<PAGE>   175

       (f) Owners Required To Provide Information. Prior to the Restriction
Termination Date each Person who is a beneficial owner or Constructive Owner of
Partnership Units and each Person who is holding Partnership Units for a
beneficial owner or Constructive Owner shall provide to the Partnership such
information that the Partnership may request, in good faith, in order to
determine the Partnership's status as a partnership (as opposed to a
corporation) or AMB's status as a REIT for federal income tax purposes.

       (g) Remedies Not Limited. Nothing contained in this Exhibit I shall limit
the authority of the General Partner to take such other action as it deems
necessary or advisable to protect the Partnership and the interests of its
Partners by preservation of the Partnership's status as a partnership (as
opposed to a corporation) or AMB's status as a REIT for federal income tax
purposes.

       (h) Ambiguity. In the case of an ambiguity in the application of any of
the provisions of this Exhibit I, including any definition contained in
subsection (a), the General Partner shall have the power to determine the
application of the provisions of this Exhibit I with respect to any situation
based on the facts known to it. In the event that a provision of this Exhibit I
requires an action by the General Partner and Exhibit I fails to provide
specific guidance with respect to such action, the General Partner shall have
the power to determine the action to be taken so long as such action is not
contrary to the provisions of Exhibit I. Absent a decision to the contrary by
the General Partner (which the General Partner may make in its sole and absolute
discretion), if a Person would have (but for the remedies set forth in
subsection (b)) acquired Constructive Ownership of Partnership Units in
violation of subsection (b)(i), such remedies (as applicable) shall apply first
to the Partnership Units which, but for such remedies, would have been actually
owned by such Person, and second to Partnership Units which, but for such
remedies, would have been Constructively Owned (but not actually owned) by such
Person, pro rata among the Persons who actually own such Partnership Units based
upon the relative number of the Partnership Units held by each such Person.

                                      I-6

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