<Page>

                                                                     EXHIBIT 4.2

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                      BOSTON PROPERTIES LIMITED PARTNERSHIP

                                       TO


                                     TRUSTEE

                                   ----------

                                    INDENTURE

                      DATED AS OF _______________ __, 200_


                                   ----------

                          SUBORDINATED DEBT SECURITIES

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

<Page>

                                TABLE OF CONTENTS

<Table>
<Caption>
                                                                                          Page
                                                                                          ----
<S>                                                                                         <C>
RECITALS OF THE COMPANY......................................................................1

ARTICLE ONE - DEFINITIONS AND OTHER PROVISIONS OF GENERAL APPLICATION........................1
     SECTION 1.01. Definitions...............................................................1
     SECTION 1.02. Compliance Certificates and Opinions.....................................11
     SECTION 1.03. Form of Documents Delivered to Trustee...................................12
     SECTION 1.04. Acts of Holders..........................................................13
     SECTION 1.05. Notices, etc., to Trustee and Company....................................14
     SECTION 1.06. Notice to Holders: Waiver................................................15
     SECTION 1.07. Counterparts; Effect of Headings and Table of Contents...................16
     SECTION 1.08. Successors and Assigns...................................................16
     SECTION 1.09. Severability Clause......................................................16
     SECTION 1.10. Benefits of Indenture....................................................16
     SECTION 1.11. Governing Law............................................................16
     SECTION 1.12. Non-Business Day.........................................................16
     SECTION 1.13. Limited Liability; Immunity of Partners, Stockholders, Directors,
                      Officers and Agents of the Company and Boston Properties..............17
     SECTION 1.14. Conflict with Trust Indenture Act........................................17

ARTICLE TWO - SECURITIES FORMS..............................................................17
     SECTION 2.01. Forms of Securities......................................................17
     SECTION 2.02. Form of Trustee's Certificate of Authentication..........................18
     SECTION 2.03. Securities Issuable in Global Form.......................................18

ARTICLE THREE - THE SECURITIES..............................................................19
     SECTION 3.01. Amount Unlimited; Issuable in Series.....................................19
     SECTION 3.02. Denominations............................................................22
     SECTION 3.03. Execution, Authentication, Delivery and Dating...........................23
     SECTION 3.04. Temporary Securities.....................................................25
     SECTION 3.05. Registration, Registration of Transfer and Exchange......................27
     SECTION 3.06. Mutilated, Destroyed, Lost and Stolen Securities.........................31
     SECTION 3.07. Payment of Interest; Interest Rights Preserved...........................32
     SECTION 3.08. Persons Deemed Owners....................................................34
     SECTION 3.09. Cancellation.............................................................34
     SECTION 3.10. Computation of Interest..................................................35
     SECTION 3.11. CUSIP Numbers............................................................35

ARTICLE FOUR - SATISFACTION AND DISCHARGE...................................................35
     SECTION 4.01. Satisfaction and Discharge of Indenture..................................35
     SECTION 4.02. Application of Trust Funds...............................................37
</Table>

                                       (i)
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<S>                                                                                         <C>
ARTICLE FIVE - REMEDIES.....................................................................37
     SECTION 5.01. Events of Default........................................................37
     SECTION 5.02. Acceleration of Maturity; Rescission and Annulment.......................39
     SECTION 5.03. Collection of Indebtedness and Suits for Enforcement by Trustee..........40
     SECTION 5.04. Trustee May File Proofs of Claim.........................................40
     SECTION 5.05. Trustee May Enforce Claims Without Possession of Securities or
                      Coupons...............................................................41
     SECTION 5.06. Application of Money Collected...........................................42
     SECTION 5.07. Limitation on Suits......................................................42
     SECTION 5.08. Unconditional Right of Holders to Receive Principal, Premium
                      or Make-Whole Amount, if any, and Interest, if any....................43
     SECTION 5.09. Restoration of Rights and Remedies.......................................43
     SECTION 5.10. Rights and Remedies Cumulative...........................................43
     SECTION 5.11. Delay or Omission Not Waiver.............................................43
     SECTION 5.12. Control by Holders of Securities.........................................43
     SECTION 5.13. Waiver of Past Defaults..................................................44
     SECTION 5.14. Waiver of Usury, Stay or Extension Laws..................................44
     SECTION 5.15. Undertaking for Costs....................................................44

ARTICLE SIX - THE TRUSTEE...................................................................45
     SECTION 6.01. Notice of Defaults.......................................................45
     SECTION 6.02. Certain Rights of Trustee................................................45
     SECTION 6.03. Not Responsible for Recitals or Issuance of Securities...................47
     SECTION 6.04. May Hold Securities......................................................47
     SECTION 6.05. Money Held in Trust......................................................47
     SECTION 6.06. Compensation and Reimbursement...........................................47
     SECTION 6.07. Corporate Trustee Required; Eligibility; Conflicting Interests...........48
     SECTION 6.08. Resignation and Removal; Appointment of Successor........................48
     SECTION 6.09. Acceptance of Appointment by Successor...................................50
     SECTION 6.10. Merger, Conversion, Consolidation or Succession to Business..............51
     SECTION 6.11. Appointment of Authenticating Agent......................................51
     SECTION 6.12. Certain Duties and Responsibilities of the Trustee.......................52

ARTICLE SEVEN - HOLDERS' LISTS AND REPORTS BY TRUSTEE AND COMPANY...........................54
     SECTION 7.01. Disclosure of Names and Addresses of Holders.............................54
     SECTION 7.02. Reports by Trustee.......................................................54
     SECTION 7.03. Reports by Company.......................................................54
     SECTION 7.04. Company to Furnish Trustee Names and Addresses of Holders................55

ARTICLE EIGHT - CONSOLIDATION, MERGER, SALE, LEASE OR CONVEYANCE............................55
     SECTION 8.01. Consolidations and Mergers of Company and Sales, Leases and
                      Conveyances Permitted Subject to Certain Conditions...................55
     SECTION 8.02. Rights and Duties of Successor Corporation...............................55
     SECTION 8.03. Officers' Certificate and Opinion of Counsel.............................56
</Table>

                                      (ii)
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ARTICLE NINE - SUPPLEMENTAL INDENTURES......................................................56
     SECTION 9.01. Supplemental Indentures without Consent of Holders.......................56
     SECTION 9.02. Supplemental Indentures with Consent of Holders..........................58
     SECTION 9.03. Execution of Supplemental Indentures.....................................59
     SECTION 9.04. Effect of Supplemental Indentures........................................59
     SECTION 9.05. Conformity with Trust Indenture Act......................................59
     SECTION 9.06. Reference in Securities to Supplemental Indentures.......................59

ARTICLE TEN - COVENANTS.....................................................................59
     SECTION 10.01. Payment of Principal, Premium or Make-Whole Amount, if
                      any, and Interest, if any.............................................59
     SECTION 10.02. Maintenance of Office or Agency.........................................60
     SECTION 10.03. Money for Securities Payments to Be Held in Trust.......................61
     SECTION 10.04. Existence...............................................................62
     SECTION 10.05. Maintenance of Properties...............................................62
     SECTION 10.06. Insurance...............................................................63
     SECTION 10.07. Payment of Taxes and Other Claims.......................................63
     SECTION 10.08. Statement as to Compliance..............................................63
     SECTION 10.09. Waiver of Certain Covenants.............................................63

ARTICLE ELEVEN - REDEMPTION OF SECURITIES...................................................64
     SECTION 11.01. Applicability of Article................................................64
     SECTION 11.02. Election to Redeem; Notice to Trustee...................................64
     SECTION 11.03. Selection by Trustee of Securities to Be Redeemed.......................64
     SECTION 11.04. Notice of Redemption....................................................64
     SECTION 11.05. Deposit of Redemption Price.............................................66
     SECTION 11.06. Securities Payable on Redemption Date...................................66
     SECTION 11.07. Securities Redeemed in Part.............................................67

ARTICLE TWELVE - SINKING FUNDS..............................................................67
     SECTION 12.01. Applicability of Article................................................67
     SECTION 12.02. Satisfaction of Sinking Fund Payments with Securities...................67
     SECTION 12.03. Redemption of Securities for Sinking Fund...............................68

ARTICLE THIRTEEN - REPAYMENT AT THE OPTION OF HOLDERS.......................................68
     SECTION 13.01. Applicability of Article................................................68
     SECTION 13.02. Repayment of Securities.................................................68
     SECTION 13.03. Exercise of Option......................................................68
     SECTION 13.04. When Securities Presented for Repayment Become Due and
                      Payable...............................................................69
     SECTION 13.05. Securities Repaid in Part...............................................70

ARTICLE FOURTEEN - DEFEASANCE AND COVENANT DEFEASANCE.......................................70
     SECTION 14.01. Applicability of Article: Company's Option to Effect
                      Defeasance or Covenant Defeasance.....................................70
     SECTION 14.02. Defeasance and Discharge................................................70
     SECTION 14.03. Covenant Defeasance.....................................................71
</Table>

                                      (iii)
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     SECTION 14.04. Conditions to Defeasance or Covenant Defeasance.........................71
     SECTION 14.05. Deposited Money and Government Obligations to Be Held in
                      Trust; Other Miscellaneous Provisions.................................73

ARTICLE FIFTEEN - MEETINGS OF HOLDERS OF SECURITIES.........................................74
     SECTION 15.01. Purposes for Which Meetings May Be Called...............................74
     SECTION 15.02. Call, Notice and Place of Meetings......................................74
     SECTION 15.03. Persons Entitled to Vote at Meetings....................................75
     SECTION 15.04. Quorum; Action..........................................................75
     SECTION 15.05. Determination of Voting Rights; Conduct and Adjournment of
                      Meetings..............................................................76
     SECTION 15.06. Counting Votes and Recording Action of Meetings.........................77

ARTICLE SIXTEEN - SUBORDINATION OF SECURITIES...............................................77
     SECTION 16.01. Agreement to Subordinate................................................77
     SECTION 16.02. Payment Over of Proceeds upon Dissolution, Etc..........................77
     SECTION 16.03. No Payment When Senior Indebtedness in Default..........................78
     SECTION 16.04. Reliance by Senior Indebtedness on Subordination Provisions.............80
     SECTION 16.05. Subrogation to Rights of Holders of Senior Indebtedness.................80
     SECTION 16.06. Provisions Solely to Define Relative Rights.............................80
     SECTION 16.07. Trustee to Effectuate Subordination.....................................80
     SECTION 16.08. No Waiver of Subordination Provisions...................................81
     SECTION 16.09. Notice to Trustee.......................................................81
     SECTION 16.10. Reliance on Judicial Order or Certificate of Liquidating Agent..........82
     SECTION 16.11. Trustee Not Fiduciary for Holders of Senior Indebtedness................82
     SECTION 16.12. Rights of Trustee as Holder of Senior Indebtedness;
                      Preservation of Trustee's Rights......................................83
     SECTION 16.13. Article Applicable to Paying Agents.....................................83

SIGNATURES..................................................................................84

EXHIBIT A FORM OF REDEEMABLE OR NON-REDEEMABLE SUBORDINATED SECURITY.......................A-1

EXHIBIT B FORMS OF CERTIFICATION...........................................................B-1
</Table>

                                      (iv)
<Page>

                      BOSTON PROPERTIES LIMITED PARTNERSHIP

     Reconciliation and tie between the Trust Indenture Act of 1939, as amended
(the "TRUST INDENTURE ACT" or "TIA") and the Indenture, dated as of
_____________, 200_.

<Table>
<Caption>
         Trust Indenture
           Act Section                                                   Indenture Section
        -----------------                                               -------------------
        <S>                                                                 <C>
        Section 310(a)(1)  ..........................................       6.07
                   (a)(2)  ..........................................       Not applicable
                   (a)(3)  ..........................................       Not applicable
                   (a)(4)  ..........................................       Not applicable
                   (a)(5)  ..........................................       Not applicable
                      (b)  ..........................................       6.04, 6.08
              Section 311  ..........................................       1.01(2), 6.04
              Section 312  ..........................................       7.01
                      (a)  ..........................................       Not applicable
                      (b)  ..........................................       7.01
                      (c)  ..........................................       Not applicable
              Section 313  ..........................................       1.01("Outstanding"), 7.02
                      (c)  ..........................................       6.01, 7.03
              Section 314  ..........................................       Not applicable
                      (a)  ..........................................       Not applicable
                      (b)  ..........................................       Not applicable
                   (c)(1)  ..........................................       Not applicable
                   (c)(2)  ..........................................       Not applicable
                   (c)(3)  ..........................................       Not applicable
                      (d)  ..........................................       Not applicable
                      (e)  ..........................................       Not applicable
           Section 315(a)  ..........................................       3.03, 6.02
                      (b)  ..........................................       3.03, 6.02
                      (c)  ..........................................       3.03, 6.02
                      (d)  ..........................................       3.03, 6.02
                      (e)  ..........................................       6.08
           Section 316(a)  ..........................................       Not applicable
                (a)(1)(A)  ..........................................       Not applicable
                (a)(1)(B)  ..........................................       Not applicable
                   (a)(2)  ..........................................       Not applicable
                      (b)  ..........................................       Not applicable
                      (c)  ..........................................       1.04
        Section 317(a)(1)  ..........................................       Not applicable
                   (a)(2)  ..........................................       Not applicable
                      (b)  ..........................................       Not applicable
           Section 318(a)  ..........................................       Not applicable
</Table>

                                       (v)
<Page>

----------
NOTE:  This reconciliation and tie shall not, for any purpose, be deemed to be a
       part of the Indenture.

     Attention should also be directed to TIA Section 318(c), which provides
that the provisions of TIA Sections 310 to and including 317 are a part of and
govern every qualified indenture, whether or not physically contained therein.

                                      (vi)
<Page>

     INDENTURE, dated as of _________, 200_, between BOSTON PROPERTIES LIMITED
PARTNERSHIP, a limited partnership organized under the laws of the State of
Delaware (hereinafter called the "COMPANY"), having its principal office at 111
Huntington Avenue, Suite 300, Boston, Massachusetts and ________________, a
________________, as Trustee hereunder (hereinafter called the "TRUSTEE"),
having a Corporate Trust Office at ___________________________________________.

                             RECITALS OF THE COMPANY

     The Company deems it necessary to issue from time to time for its lawful
purposes subordinated debt securities (hereinafter called the "SECURITIES")
evidencing its unsecured and subordinated indebtedness, and has duly authorized
the execution and delivery of this Indenture to provide for the issuance from
time to time of the Securities, to be issued in one or more Series as provided
in this Indenture.

     This Indenture is subject to the provisions of the Trust Indenture Act of
1939, as amended (the "TRUST INDENTURE ACT" or "TIA"), that are deemed to be
incorporated into this Indenture and shall, to the extent applicable, be
governed by such provisions.

     All things necessary to make this Indenture a valid and legally binding
agreement of the Company, in accordance with its terms, have been done.

                   NOW, THEREFORE, THIS INDENTURE WITNESSETH:

     For and in consideration of the premises and the purchase of the Securities
by the Holders thereof, it is mutually covenanted and agreed, for the equal and
proportionate benefit of all Holders of the Securities, as follows:

            ARTICLE ONE - DEFINITIONS AND OTHER PROVISIONS OF GENERAL
                                   APPLICATION

     SECTION 1.01. DEFINITIONS. For all purposes of this Indenture, except as
otherwise expressly provided or unless the context otherwise requires:

          (1)       the terms defined in this Article have the meanings assigned
     to them in this Article, and include the plural as well as the singular;

          (2)       all other terms used herein which are defined in the TIA,
     either directly or by reference therein, have the meanings assigned to them
     therein, and the terms "cash transactions" and "self liquidating paper," as
     used in TIA Section 311, shall have the meanings assigned to them in the
     rules of the Commission adopted under the TIA;

          (3)       all accounting terms not otherwise defined herein have the
     meanings assigned to them in accordance with GAAP; and

          (4)       the words "herein," "hereof "and "hereunder" and other words
     of similar import refer to this Indenture as a whole and not to any
     particular Article, Section or other subdivision.

<Page>

     "ACT," when used with respect to any Holder, has the meaning specified in
Section 1.04.

     "AFFILIATE" of any specified Person means any other Person directly or
indirectly controlling or controlled by or under direct or indirect common
control with such specified Person. For the purposes of this definition,
"CONTROL" when used with respect to any specified Person means the power to
direct the management and policies of such Person, directly or indirectly,
whether through the ownership of voting securities, by contract or otherwise;
and the terms "CONTROLLING" and "CONTROLLED" have meanings correlative to the
foregoing.

     "AUTHENTICATING AGENT" means any Person authorized by the Trustee pursuant
to Section 6.11 hereof to act on behalf of the Trustee to authenticate
Securities.

     "AUTHORIZED NEWSPAPER" means a newspaper, printed in the English language
or in an official language of the country of publication, customarily published
on each Business Day, whether or not published on Saturdays, Sundays or
holidays, and of general circulation in each place in connection with which the
term is used or in the financial community of each such place. Whenever
successive publications are required to be made in Authorized Newspapers, the
successive publications may be made in the same or in different Authorized
Newspapers in the same city meeting the foregoing requirements and in each case
on any Business Day.

     "BANKRUPTCY LAW" has the meaning specified in Section 5.01.

     "BEARER SECURITY" means any Security established pursuant to Section 2.01
which is payable to the bearer.

     "BOARD OF DIRECTORS" when used with reference to the Company, means the
board of directors of Boston Properties or any committee of that board duly
authorized to act hereunder or any director or directors and/or officer or
officers of Boston Properties to whom the board or committee shall have duly
delegated its authority.

     "BOARD RESOLUTION" means a copy of (1) a resolution certified by the
Secretary or an Assistant Secretary of Boston Properties to have been duly
adopted by the Board of Directors or a duly authorized committee of the Board of
Directors and to be in full force and effect on the date of such certification
or (2) a certificate signed by the director or directors or officer or officers
to whom the Board of Directors of Boston Properties shall have duly delegated
its authority together with a resolution certified by the Secretary or an
Assistant Secretary of Boston Properties to have been duly adopted by the Board
of Directors and to be in full force and effect on the date of such
certification authorizing such delegation, and, in each case, delivered to the
Trustee.

     "BOSTON PROPERTIES" means Boston Properties, Inc., a Delaware corporation
and the general partner of the Company, until a successor Person shall have
become the general partner of the Company, and thereafter "Boston Properties"
shall mean such successor general partner.

     "BUSINESS DAY," when used with respect to any Place of Payment or any other
particular location referred to in this Indenture or in the Securities, means,
unless otherwise specified with respect to any Securities issued pursuant to
Section 3.01, any day, other than a Saturday or Sunday, that is neither a legal
holiday nor a day on which banking institutions in that Place of

                                        2
<Page>

Payment or particular location are authorized or required by law, regulation or
executive order to close.

     "CAPITAL STOCK" means, with respect to any Person, any capital stock
(including preferred stock), shares, interests, participations or other
ownership interests (however designated) of such Person and any rights (other
than debt securities convertible into or exchangeable for corporate stock),
warrants or options to purchase any thereof.

     "CLEARSTREAM" means Clearstream Banking Luxemburg, societe anonyme, or its
successor.

     "CODE" means the Internal Revenue Code of 1986, as amended, and the
regulations thereunder.

     "COMMISSION" means the Securities and Exchange Commission, as from time to
time constituted, created under the Exchange Act, or, if at any time after
execution of this instrument such Commission is not existing and performing the
duties now assigned to it under the Trust Indenture Act, then the body
performing such duties on such date.

     "COMMON DEPOSITORY" has the meaning specified on Section 3.04.

     "COMMON STOCK" means, with respect to any Person, all shares of capital
stock issued by such Person other than Preferred Stock.

     "COMPANY" means the Person named as the "Company" in the first paragraph of
this Indenture until a successor corporation shall have become such pursuant to
the applicable provisions of this Indenture, and thereafter "Company" shall mean
such successor corporation.

     "COMPANY RECOURSE INDEBTEDNESS" has the meaning specified in Section
5.01(5).

     "COMPANY REQUEST" and "COMPANY ORDER" mean, respectively, a written request
or order signed in the name of the Company by the Chairman of the Board, the
President or a Vice President, of Boston Properties, and by the Treasurer,
Assistant Treasurer, Secretary or Assistant Secretary of Boston Properties, and
delivered to the Trustee.

     "CONVERSION EVENT" means the cessation of use of (i) a Foreign Currency
both by the government of the country which issued such currency and for the
settlement of transactions by a central bank or other public institutions of or
within the international banking community, (ii) the ECU both within the
European Monetary System and for the settlement of transactions by public
institutions of or within the European Communities or (iii) any currency unit
(or composite currency) other than the ECU for the purposes for which it was
established.

     "CORPORATE TRUST OFFICE" means the office of the Trustee at which, at any
particular time, its corporate trust business shall be principally administered,
which office at the date hereof is located at _________________________________.

     "CORPORATION" includes corporations, limited liability companies,
partnerships, associations, companies and business trusts.

                                        3
<Page>

     "COUPON" means any interest coupon appertaining to a Bearer Security.

     "COVENANT DEFEASANCE" has the meaning specified in Section 14.03.

     "CUSTODIAN" has the meaning specified in Section 5.01.

     "DEBT INSTRUMENT" has the meaning specified in Section 5.01(5).

     "DEFAULTED INTEREST" has the meaning specified in Section 3.07.

     "DEFEASANCE" has the meaning specified in Section 14.02.

     "DOLLAR" and the sign "$" means a dollar or other equivalent unit in such
coin or currency of the United States of America as at the time of payment is
legal tender for the payment of public and private debts.

     "DTC" means the Depository Trust Company and any successor to DTC in its
capacity as depository for any Securities.

     "ECU" means the European Currency Unit as defined and revised from time to
time by the Council of the European Communities.

     "EUROCLEAR" means Morgan Guaranty Trust Company of New York, Brussels
office, or its successor, as operator of the Euroclear System.

     "EUROPEAN COMMUNITIES" means the European Economic Community, the European
Coal and Steel Community and the European Atomic Energy Community.

     "EUROPEAN MONETARY SYSTEM" means the European Monetary System established
by the Resolution of December 5, 1978 of the Council of the European
Communities.

     "EVENT OF DEFAULT" has the meaning specified in Section 5.01.

     "EXCHANGE ACT" means the Securities Exchange Act of 1934, as amended, as in
force at the date as of which this Indenture was executed; PROVIDED, HOWEVER,
that in the event the Exchange Act is amended after such date, "Exchange Act"
means to the extent required by any such amendment, the Exchange Act as so
amended.

     "EXCHANGE DATE" has the meaning specified in Section 3.04.

     "FOREIGN CURRENCY" means any currency, currency unit or composite currency,
including, without limitation, the ECU issued by the government of one or more
countries other than the United States of America or by any recognized
confederation or association of such governments.

     "GAAP" means generally accepted accounting principles in the United States,
consistently applied, as in effect from time to time.

                                        4
<Page>

     "GLOBAL SECURITY" means a Security evidencing all or a part of a series of
Securities issued to and registered in the name of the depository for such
series, or its nominee, in accordance with Section 3.05, and bearing the legend
prescribed in Section 2.03.

     "GOVERNMENT OBLIGATIONS" means (i) securities which are (A) direct
obligations of the United States of America or the government which issued the
Foreign Currency in which the Securities of a particular series are payable, for
the payment of which its full faith and credit is pledged or (B) obligations of
a Person controlled or supervised by and acting as an agency or instrumentality
of the United States of America or such government which issued the Foreign
Currency in which the Securities of such series are payable, the payment of
which is unconditionally guaranteed as a full faith and credit obligation by the
United States of America or such other government, which, in either case, are
not callable or redeemable at the option of the issuer thereof, and (ii) a
depository receipt issued by a bank or trust company as custodian with respect
to any such Government Obligation or a specific payment of interest on or
principal of any such Government Obligation held by such custodian for the
account of the holder of a depository receipt, PROVIDED THAT (except as required
by law) such custodian is not authorized to make any deduction from the amount
payable to the holder of such depository receipt from any amount received by the
custodian in respect of the Government Obligation or the specific payment of
interest on or principal of the Government Obligation evidenced by such
depository receipt.

     "GUARANTY" by any Person means any Obligation, contingent or otherwise, of
such Person guaranteeing any Indebtedness of any other Person (the "primary
obligor") in any manner, whether directly or indirectly, and including, without
limitation, every Obligation of such Person (i) to purchase or pay (or advance
or supply funds for the purchase or payment of) such Indebtedness or to purchase
(or to advance or supply funds for the purchase of) any security for the payment
of such Indebtedness, (ii) to purchase property, securities or services for the
purpose of assuring the holder of such Indebtedness of the payment of such
Indebtedness or (iii) to maintain working capital, equity capital or other
financial statement condition or liquidity of the primary obligor so as to
enable the primary obligor to pay such Indebtedness; PROVIDED, HOWEVER, that a
Guaranty by any Person shall not include endorsements by such Person for
collection or deposit, in either case in the ordinary course of business. The
terms "GUARANTEED," "GUARANTEEING" and "GUARANTOR" shall have meanings
correlative to the foregoing.

     "HOLDER" means, in the case of a Registered Security, the Person in whose
name a Security is registered in the Security Register and, in the case of a
Bearer Security, the bearer thereof and, when used with respect to any coupon,
shall mean the bearer thereof.

     "INDEBTEDNESS" means, with respect to any Person, without duplication, (i)
any Obligation of such Person relating to any indebtedness of such Person (A)
for borrowed money (whether or not the recourse of the lender is to the whole of
the assets, of such Person or only to a portion thereof), (B) evidenced by
notes, debentures or similar instruments (including purchase money obligations)
given in connection with the acquisition of any property or assets (other than
trade accounts payable for inventory or similar property acquired in the
ordinary course of business), including securities, for the payment of which
such Person is liable, directly or indirectly, or the payment of which is
secured by a lien, charge or encumbrance on property or assets of such Person,
(C) for goods, materials or services purchased in the ordinary course of
business (other

                                        5
<Page>

than trade accounts payable arising in the ordinary course of business), (D)
with respect to letters of credit or bankers acceptances issued for the account
of such Person or performance, surety or similar bonds, (E) for the payment of
money relating to any obligations under any capital lease of real or personal
property which has been recorded as a capitalized lease obligation or (F) under
interest rate swaps, caps or similar agreements and foreign exchange contracts,
currency swaps or similar agreements; (ii) any liability of others of the kind
described in the preceding clause (i), which such Person has Guaranteed or which
is otherwise its legal liability; and (iii) any and all deferrals, renewals,
extensions and refunding of, or amendments, modifications or supplements to, any
liability of the kind described in any of the preceding clauses (i) or (ii).

     "INDENTURE" means this instrument as originally executed or as it may be
supplemented or amended from time to time by one or more indentures supplemental
hereto entered into pursuant to the applicable provisions hereof, and shall
include the terms of particular series of Securities established as contemplated
by Section 3.01; PROVIDED, HOWEVER, that, if at any time more than one Person is
acting as Trustee under this instrument, "Indenture" shall mean, with respect to
any one or more series of Securities for which such Person is Trustee, this
instrument as originally executed or as it may be supplemented or amended from
time to time by one or more indentures supplemental hereto entered into pursuant
to the applicable provisions hereof and shall include the terms of the or those
particular series of Securities for which such Person is Trustee established as
contemplated by Section 3.01, exclusive, however, of any provisions or terms
which relate solely to other series of Securities for which such Person is
Trustee, regardless of when such terms or provisions were adopted, and exclusive
of any provisions or terms adopted by means of one or more indentures
supplemental hereto executed and delivered after such Person had become such
Trustee but to which such Person, as such Trustee, was not a party.

     "INDEXED SECURITY" means a Security the terms of which provide that the
principal amount thereof payable at Stated Maturity may be more or less than the
principal face amount thereof at original issuance.

     "INTEREST," when used with respect to an Original Issue Discount Security
which by its terms bears interest only after Maturity, shall mean interest
payable after Maturity.

     "INTEREST PAYMENT DATE," when used with respect to any Security, means the
Stated Maturity of an installment of interest on such Security.

     "MAKE-WHOLE AMOUNT," when used with respect to any Security, means the
amount, if any, in addition to principal (and accrued interest thereon, if any)
which is required by a Security, under the terms and conditions specified
therein or as otherwise specified as contemplated by Section 3.01, to be paid by
the Company to the Holder thereof in connection with any optional redemption or
accelerated payment of such Security.

     "MANDATORY SINKING FUND PAYMENT" has the meaning specified in Section
12.01.

     "MATURITY," when used with respect to any Security, means the date on which
the principal (or, if the context so requires, in the case of an Original Issue
Discount Security, or lesser amount or, in the case of an Indexed Security, an
amount determined in accordance with the specified terms of that Security) of
such Security or an installment of principal becomes due

                                        6
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and payable as therein or herein provided, whether at the Stated Maturity or by
declaration of acceleration, notice of redemption, notice of option to elect
repayment or otherwise.

     "NASD" has the meaning specified in Section 13.03.

     "NOTICE OF DEFAULT" has the meaning specified in Section 5.01.

     "OBLIGATION" of any Person with respect to any specified Indebtedness means
any obligation of such Person to pay principal, premium, interest (including
interest accruing on or after the filing of any petition in bankruptcy or for
reorganization relating to such Person, whether or not a claim for such
post-petition interest is allowed in such Proceeding), penalties, reimbursement
or indemnification amounts, fees, expenses or other amounts relating to such
Indebtedness.

     "OFFICERS' CERTIFICATE" means a certificate signed by the Chairman of the
Board of Directors, the President or any Vice President (whether or not
designated by a number or word or words added before or after the title "Vice
President") and by the Treasurer, an Assistant Treasurer, the Secretary or an
Assistant Secretary of Boston Properties, and delivered to the Trustee.

     "OPINION OF COUNSEL" means a written opinion of counsel, who may be counsel
for the Company or who may be an employee of or other counsel for the Company.

     "OPTION TO ELECT REPAYMENT" has the meaning specified in Section 13.03.

     "OPTIONAL SINKING FUND PAYMENT" has the meaning specified in Section 12.01.

     "ORIGINAL ISSUE DISCOUNT SECURITY" means any Security which provides for an
amount (excluding any amounts attributable to accrued but unpaid interest
thereon) less than the principal amount thereof to be due and payable upon a
declaration of acceleration of the Maturity thereof pursuant to Section 5.02.

     "OUTSTANDING," when used with respect to Securities, means, as of the date
of determination, all Securities theretofore authenticated and delivered under
this Indenture, EXCEPT:

                    (i)       Securities theretofore canceled by the Trustee or
     delivered to the Trustee for cancellation;

                    (ii)      Securities, or portions thereof, for whose payment
     or redemption (including repayment at the option of the Holder) money in
     the necessary amount has been theretofore deposited with the Trustee or any
     Paying Agent (other than the Company) in trust or set aside and segregated
     in trust by the Company (if the Company shall act as its own Paying Agent)
     for the Holders of such Securities and any coupons appertaining thereto;
     PROVIDED, HOWEVER, that, if such Securities are to be redeemed, notice of
     such redemption has been duly given pursuant to this Indenture, or
     provision therefor satisfactory to the Trustee has been made;

                                        7
<Page>

                    (iii)     Securities, except to the extent provided in
     Sections 14.02 and 14.03, with respect to which the Company has effected
     defeasance and/or covenant defeasance as provided in Article Fourteen; and

                    (iv)      Securities which have been paid pursuant to
     Section 3.06 or in exchange for or in lieu of which other Securities have
     been authenticated and delivered pursuant to this Indenture, other than any
     such Securities in respect of which there shall have been presented to the
     Trustee proof satisfactory to it that such Securities are held by a bona
     fide purchaser in whose hands such Securities are valid obligations of the
     Company.

PROVIDED, HOWEVER, that in determining whether the Holders of the requisite
principal amount of the Outstanding Securities have given any request, demand,
authorization, direction, notice, consent or waiver hereunder or are present at
a meeting of Holders for quorum purposes, and for the purpose of making the
calculations required by TIA Section 313, (i) the principal amount of an
Original Issue Discount Security that may be counted in making such
determination or calculation and that shall be deemed to be Outstanding for such
purpose shall be equal to the amount of principal thereof that would be (or
shall have been declared to be) due and payable, at the time of such
determination, upon a declaration of acceleration of the maturity thereof
pursuant to Section 5.02, (ii) the principal amount of any Security denominated
in a Foreign Currency that may be counted in making such determination or
calculation and that shall be deemed Outstanding for such purpose shall be equal
to the Dollar equivalent, determined pursuant to Section 3.01 as of the date
such Security is originally issued by the Company, of the principal amount (or,
in the case of an Original Issue Discount Security, the Dollar equivalent as of
such date of original issuance of the amount determined as provided in clause
(i) above) of such Security, (iii) the principal amount of any Indexed Security
that may be counted in making such determination or calculation and that shall
be deemed outstanding for such purpose shall be equal to the principal face
amount of such Indexed Security at original issuance, unless otherwise provided
with respect to such Security pursuant to Section 3.01, and (iv) Securities
owned by the Company or any other obligor upon the Securities or any Affiliate
of the Company or of such other obligor shall be disregarded and deemed not to
be Outstanding, except that, in determining whether the Trustee shall be
protected in making such calculation or in relying upon any such request,
demand, authorization, direction, notice, consent or waiver, only Securities
which a Responsible Officer of the Trustee actually knows to be so owned shall
be so disregarded. Securities owned as provided in clause (iv) above which have
been pledged in good faith may be regarded as Outstanding if the pledgee
establishes to the satisfaction of the Trustee the pledgee's right so to act
with respect to such Securities and that the pledgee is not the Company or any
other obligor upon the Securities or any Affiliate of the Company or of such
other obligor. In case of a dispute as to such right, the advice of counsel
shall be full protection in respect of any decision made by the Trustee in
accordance with such advice.

     "PAYMENT BLOCKAGE NOTICE" and "PAYMENT BLOCKAGE PERIOD" have the respective
meanings specified in Section 16.03.

     "PAYING AGENT" means any Person authorized by the Company to pay the
principal of (and premium or Make-Whole Amount, if any) or interest on any
Securities or coupons on behalf of the Company.

                                        8
<Page>

     "PERSON" means any individual, corporation, limited liability company,
partnership, joint venture, association, joint-stock company, trust,
unincorporated organization or government or any agency or political subdivision
thereof, or any other entity or organization.

     "PLACE OF PAYMENT," when used with respect to the Securities of or within
any series, means the place or places where the principal of (and premium or
Make-Whole Amount, if any) and interest on such Securities are payable as
specified as contemplated by Sections 3.01 and 10.02.

     "PREDECESSOR SECURITY" of any particular Security means every previous
Security evidencing all or a portion of the same debt as that evidenced by such
particular Security; and, for the purposes of this definition, any Security
authenticated and delivered under Section 3.06 in exchange for or in lieu of a
mutilated, destroyed, lost or stolen Security or a Security to which a
mutilated, destroyed, lost or stolen coupon appertains shall be deemed to
evidence the same debt as the mutilated, destroyed, lost or stolen Security or
the Security to which the mutilated, destroyed, lost or stolen coupon
appertains.

     "PREFERRED STOCK" means, with respect to any Person, all capital stock
issued by such Person that is entitled to a preference or priority over any
other capital stock issued by such Person with respect to any distribution of
such Person's assets, whether by dividend or upon any voluntary or involuntary
liquidation, dissolution or winding up.

     "PROCEEDING" has the meaning specified in Section 16.02.

     "RECOURSE" means, with reference to any indebtedness for money borrowed,
the portion of such indebtedness, if any, that is not Without Recourse to the
obligor thereunder, directly or indirectly. For purposes hereof, a Person shall
not be deemed to be "indirectly" liable for indebtedness of an obligor solely by
reason of the fact that such Person has an ownership interest in such obligor,
PROVIDED that such Person is not otherwise legally liable, directly or
indirectly, for such obligor's indebtedness (e.g., by reason of a guaranty or
contribution obligation, by operation of law or by reason of such Person being a
general partner of such obligor).

     "REDEMPTION DATE," when used with respect to any Security to be redeemed,
in whole or in part, means the date fixed for such redemption by or pursuant to
this Indenture.

     "REDEMPTION PRICE," when used with respect to any Security to be redeemed,
means the price specified in the related Officers' Certificate or supplemental
indenture contemplated by and pursuant to Section 3.01, at which it is to be
redeemed pursuant to this Indenture.

     "REGISTERED SECURITY" shall mean any Security which is registered in the
Security Register.

     "REGULAR RECORD DATE" for the interest payable on any Interest Payment Date
on the Registered Securities of or within any series means the date specified
for that purpose as contemplated by Section 3.01, whether or not a Business Day.

     "REPAYMENT DATE" means, when used with respect to any Security to be repaid
at the option of the Holder, the date fixed for such repayment by or pursuant to
this Indenture.

                                        9
<Page>

     "REPAYMENT PRICE" means, when used with respect to any Security to be
repaid at the option of the Holder, the price at which it is to be repaid by or
pursuant to this Indenture.

     "RESPONSIBLE OFFICER," when used with respect to the Trustee, means any
Vice President (whether or not designated by a number or a word or words added
before or after the title "Vice President"), Assistant Vice President, Trust
Officer or Assistant Trust Officer working in its Corporate Trust Department, or
any other officer of the Trustee customarily performing functions similar to
those performed by any of the above designated officers and working in its
Corporate Trust Department, and also means, with respect to a particular
corporate trust matter, any other officer to whom such matter is referred
because of such officer's knowledge and familiarity with the particular subject
and who shall have direct responsibility for the administration of this
Indenture.

     "SECURITY" and "SECURITIES" has the meaning stated in the first recital of
this Indenture and, more particularly, means any Security or Securities
authenticated and delivered under this Indenture; PROVIDED, HOWEVER, that, if at
any time there is more than one Person acting as Trustee under this Indenture,
"Securities" with respect to the Indenture as to which such Person is Trustee
shall have the meaning stated in the first recital of this Indenture and shall
more particularly mean Securities authenticated and delivered under this
Indenture, exclusive, however, of Securities of any series as to which such
Person is not Trustee.

     "SECURITIES PAYMENT" has the meaning specified in Section 16.02.

     "SECURITY REGISTER" and "SECURITY REGISTRAR" have the respective meanings
specified in Section 3.05.

     "SENIOR INDEBTEDNESS" means Indebtedness of the Company, whether
outstanding on the date of this Indenture or thereafter created, incurred,
assumed or guaranteed by the Company, other than the following: (1) any
Indebtedness as to which, in the instrument evidencing such Indebtedness or
pursuant to which such Indebtedness was issued, it is expressly provided that
such Indebtedness is subordinate in right of payment to all Indebtedness of the
Company not expressly subordinated to such Indebtedness; (2) any Indebtedness
which by its terms refers explicitly to the Securities and states that such
Indebtedness shall not be senior, shall be PARI PASSU or shall be subordinated
in right of payment to the Securities; and (3) with respect to any series of
Securities, any Indebtedness of the Company evidenced by Securities of the same
or of another series. Notwithstanding anything to the contrary in the foregoing,
Senior Indebtedness shall not include: (a) Indebtedness of or amounts owed by
the Company for compensation to employees, or for goods, materials or services
purchased in the ordinary course of business, or (b) Indebtedness of the Company
to a Subsidiary of the Company.

     "SENIOR OFFICER" means, with respect to the Company, the Chairman of the
Board of Directors, the President, the Chief Executive Officer, the Chief
Financial Officer, the Treasurer, or the Controller/Chief Accounting Officer of
the Company.

     A "SERIES" of Securities means all securities denoted as part of the same
series authorized by or pursuant to a particular Board Resolution.

     "SIGNIFICANT SUBSIDIARY" has the meaning specified in Section 5.01.

                                       10
<Page>

     "SPECIAL RECORD DATE" for the payment of any Defaulted Interest on the
Registered Securities of or within any series means a date fixed by the Company
pursuant to Section 3.07.

     "STATED MATURITY," when used with respect to any Security or any
installment of principal thereof or interest thereon, means the date specified
in such Security or a coupon representing such installment of interest as the
fixed date on which the principal of such Security or such installment of
principal or interest is due and payable.

     "SUBSIDIARY" means, with respect to any Person, a corporation, partnership,
association, joint venture, trust, limited liability company or other business
entity, which is required to be consolidated with the Company or Boston
Properties in accordance with GAAP.

     "TRUST INDENTURE ACT" or "TIA" means the Trust Indenture Act of 1939, as
amended and as in force at the date as of which this Indenture was executed,
except as provided in Section 9.05.

     "TRUSTEE" means the Person named as the "Trustee" in the first paragraph of
this Indenture until a successor Trustee shall have become such pursuant to the
applicable provisions of this Indenture, and thereafter "Trustee" shall mean or
include each Person who is then a Trustee hereunder; PROVIDED, HOWEVER, that if
at any time there is more than one such Person, "Trustee" as used with respect
to the Securities of any series shall mean only the Trustee with respect to
Securities of that series.

     "UNITED STATES" means, unless otherwise specified with respect to any
Securities pursuant to Section 3.01, the United States of America (including the
states and the District of Columbia), its territories, its possessions and other
areas subject to its jurisdiction.

     "UNITED STATES PERSON" means, unless otherwise specified with respect to
any Securities pursuant to Section 3.01, an individual who is a citizen or
resident of the United States, a corporation, partnership or other entity
created or organized in or under the laws of the United States or an estate or
trust the income of which is subject to United States Federal income taxation
regardless of its source.

     "WITHOUT RECOURSE" means, with reference to any indebtedness for money
borrowed, any portion of such indebtedness for which the obligor thereunder is
not liable or obligated other than as to such obligor's interest in an asset
specifically identified or designated with respect to such indebtedness, subject
to such limited exceptions to the non-recourse nature of such indebtedness, such
as, but not limited to, fraud, misappropriation, misapplication and
environmental indemnities, as are usual and customary in like transactions
involving institutional lenders at the time of the incurrence of such
indebtedness.

     "YIELD TO MATURITY" means the yield to maturity, computed at the time of
issuance of a Security (or, if applicable, at the most recent redetermination of
interest on such Security) and as set forth in such Security in accordance with
generally accepted United States bond yield computation principles.

     SECTION 1.02. COMPLIANCE CERTIFICATES AND OPINIONS. Upon any application or
request by the Company to the Trustee to take any action under any provision of
this Indenture, the

                                       11
<Page>

Company shall furnish to the Trustee an Officers' Certificate stating that all
conditions precedent, if any, provided for in this Indenture relating to the
proposed action have been complied with and an Opinion of Counsel stating that
in the opinion of such counsel all such conditions precedent, if any, have been
complied with, except that in the case of any such application or request as to
which the furnishing of such documents is specifically required by any provision
of this Indenture relating to such particular application or request, no
additional certificate or opinion need be furnished.

     Every certificate or opinion with respect to compliance with a condition or
covenant provided for in this Indenture (including certificates delivered
pursuant to Section 10.08) shall include:

          (1)       a statement that each individual signing such certificate or
     opinion has read such condition or covenant and the definitions herein
     relating thereto;

          (2)       a brief statement as to the nature and scope of the
     examination or investigation upon which the statements or opinions
     contained in such certificate or opinion are based;

          (3)       a statement that, in the opinion of each such individual, he
     has made such examination or investigation as is necessary to enable him to
     express an informed opinion as to whether or not such condition or covenant
     has been complied with; and

          (4)       a statement as to whether, in the opinion of each such
     individual, such condition or covenant has been complied with.

     SECTION 1.03. FORM OF DOCUMENTS DELIVERED TO TRUSTEE. In any case where
several matters are required to be certified by, or covered by an opinion of,
any specified Person, it is not necessary that all such matters be certified by,
or covered by the opinion of, only one such Person, or that they be so certified
or covered by only one document, but one such Person may certify or give an
opinion with respect to some matters and one or more other such Persons as to
other matters, and any such Person may certify or give an opinion as to such
matters in one or several documents.

     Any certificate or opinion of an officer of the Company may be based,
insofar as it relates to legal matters, upon an Opinion of Counsel, or a
certificate or representations by counsel, unless such officer knows, or in the
exercise of reasonable care should know, that the opinion, certificate or
representations with respect to the matters upon which his certificate or
opinion is based are erroneous.

     Any such Opinion of Counsel or certificate or representations may be based,
insofar as it relates to factual matters, upon a certificate or opinion of, or
representations by, an officer or officers of the Company stating that the
information as to such factual matters is in the possession of the Company,
unless such counsel knows, or in the exercise of reasonable care should know,
that the certificate or opinion or representations with respect to such matters
are erroneous.

                                       12
<Page>

     Where any Person is required to make, give or execute two or more
applications, requests, consents, certificates, statements, opinions or other
instruments under this Indenture, they may, but need not, be consolidated and
form one instrument.

     SECTION 1.04. ACTS OF HOLDERS.

          (a)  Any request, demand, authorization, direction, notice, consent,
waiver or other action provided by this Indenture to be given or taken by
Holders of the Outstanding Securities of all series or one or more series, as
the case may be, may be embodied in and evidenced by one or more instruments of
substantially similar tenor signed by such Holders in person or by agents duly
appointed in writing. If Securities of a series are issuable as Bearer
Securities, any request, demand, authorization, direction, notice, consent,
waiver or other action provided by this Indenture to be given or taken by
Holders of Securities of such series may, alternatively, be embodied in and
evidenced by the record of Holders of Securities of such series voting in favor
thereof, either in person or by proxies duly appointed in writing, at any
meeting of Holders of Securities of such series duly called and held in
accordance with the provisions of Article Fifteen, or a combination of such
instruments and any such record. Except as herein otherwise expressly provided,
such action shall become effective when such instrument or instruments or record
or both are delivered to the Trustee and, where it is hereby expressly required,
to the Company. Such instrument or instruments and any such record (and the
action embodied therein and evidenced thereby) are herein sometimes referred to
as the "ACT" of the Holders signing such instrument or instruments or so voting
at any such meeting. Proof of execution of any such instrument or of a writing
appointing any such agent, or of the holding by any Person of a Security, shall
be sufficient for any purpose of this Indenture and conclusive in favor of the
Trustee and the Company and any agent of the Trustee or the Company, if made in
the manner provided in this Section. The record of any meeting of Holders of
Securities shall be proved in the manner provided in Section 15.06.

          (b)  The fact and date of the execution by any Person of any such
instrument or writing may be proved by the affidavit of a witness of such
execution or by a certificate of a notary public or other officer authorized by
law to take acknowledgments of deeds, certifying that the individual signing
such instrument or writing acknowledged to him the execution thereof. Where such
execution is by a signer acting in a capacity other than his individual
capacity, such certificate or affidavit shall also constitute sufficient proof
of his authority. The fact and date of the execution of any such instrument or
writing, or the authority of the Person executing the same, may also be proved
in any other reasonable manner which the Trustee deems sufficient.

          (c)  The ownership of Registered Securities shall be proved by the
Security Register. As to any matter relating to beneficial ownership interests
in any Global Security, the appropriate depository's records shall be
dispositive for purposes of this Indenture.

          (d)  The ownership of Bearer Securities may be proved by the
production of such Bearer Securities or by a certificate executed, as
depository, by any trust company, bank, banker or other depository, wherever
situated, if such certificate shall be deemed by the Trustee to be satisfactory,
showing that at the date therein mentioned such Person had on deposit with such
depository, or exhibited to it, the Bearer Securities therein described; or such
facts may be proved by the certificate or affidavit of the Person holding such
Bearer Securities, if such

                                       13
<Page>

certificate or affidavit is deemed by the Trustee to be satisfactory. The
Trustee and the Company may assume that such ownership of any Bearer Security
continues until (1) another certificate or affidavit bearing a later date issued
in respect of the same Bearer Security is produced, or (2) such Bearer Security
is produced to the Trustee by some other Person, or (3) such Bearer Security is
surrendered in exchange for a Registered Security, or (4) such Bearer Security
is no longer Outstanding. The ownership of Bearer Securities may also be proved
in any other manner which the Trustee deems sufficient.

          (e)  If the Company shall solicit from the Holders of Registered
Securities any request, demand, authorization, direction, notice, consent,
waiver or other Act, the Company may, at its option, in or pursuant to a Board
Resolution, fix in advance a record date for the determination of Holders
entitled to give such request, demand, authorization, direction, notice,
consent, waiver or other Act, but the Company shall have no obligation to do so.
Notwithstanding TIA Section 316(c), such record date shall be the record date
specified in or pursuant to such Board Resolution, which shall be a date not
earlier than the date 30 days prior to the first solicitation of Holders
generally in connection therewith and not later than the date such solicitation
is completed. If such a record date is fixed, such request, demand,
authorization, direction, notice, consent, waiver or other Act may be given
before or after such record date, but only the Holders of record at the close of
business on such record date shall be deemed to be Holders for the purposes of
determining whether Holders of the requisite proportion of Outstanding
Securities have authorized or agreed or consented to such request, demand,
authorization, direction, notice, consent, waiver or other Act, and for that
purpose the Outstanding Securities shall be computed as of such record date;
PROVIDED THAT no such authorization, agreement or consent by the Holders on such
record date shall be deemed effective unless it shall become effective pursuant
to the provisions of this Indenture not later than eleven months after the
record date.

          (f)  Any request, demand, authorization, direction, notice, consent,
waiver or other Act of the Holder of any Security shall bind every future Holder
of the same Security and the Holder of every Security issued upon the
registration of transfer thereof or in exchange therefor or in lieu thereof in
respect of anything done, omitted or suffered to be done by the Trustee, any
Security Registrar, any Paying Agent, any Authenticating Agent or the Company in
reliance thereon, whether or not notation of such action is made upon such
Security.

     SECTION 1.05. NOTICES, ETC., TO TRUSTEE AND COMPANY. Any request, demand,
authorization, direction, notice, consent, waiver or Act of Holders or other
documents provided or permitted by this Indenture to be made upon, given or
furnished to, or filed with,

          (1)       the Trustee by any Holder or by the Company shall be
     sufficient for every purpose hereunder if made, given, furnished or filed
     in writing to or with the Trustee at __________________________________; or

          (2)       the Company by the Trustee or by any Holder shall be
     sufficient for every purpose hereunder (unless otherwise herein expressly
     provided) if in writing and mailed, first class postage prepaid, to the
     Company addressed to it at the address of its principal office specified in
     the first paragraph of this Indenture or at any other address previously

                                       14
<Page>

     furnished in writing to the Trustee by the Company, Attention: Chief
     Financial Officer and General Counsel; or

          (3)       either the Trustee or the Company, by the other party or any
     Holder, shall be sufficient for every purpose hereunder if given by
     facsimile transmission, receipt confirmed by telephone followed by an
     original copy delivered by guaranteed overnight courier; if to the Trustee
     at facsimile number ________________; and if to the Company at facsimile
     number (617) 236-3311.

     SECTION 1.06. NOTICE TO HOLDERS: WAIVER. Where this Indenture provides for
notice of any event to Holders of Registered Securities by the Company or the
Trustee, such notice shall be sufficiently given (unless otherwise herein
expressly provided) if in writing and mailed, first-class postage prepaid, to
each such Holder affected by such event, at his address as it appears in the
Security Register, not later than the latest date, if any, and not earlier than
the earliest date, if any, prescribed for the giving of such notice. In any case
where notice to Holders of Registered Securities is given by mail, neither the
failure to mail such notice, nor any defect in any notice so mailed, to any
particular Holder shall affect the sufficiency of such notice with respect to
other Holders of Registered Securities or the sufficiency of any notice to
Holders of Bearer Securities given as provided herein. Any notice mailed to a
Holder in the manner herein prescribed shall be conclusively deemed to have been
received by such Holder, whether or not such Holder actually receives such
notice.

     If by reason of the suspension of or irregularities in regular mail service
or by reason of any other cause it shall be impracticable to give such notice by
mail, then such notification to Holders of Registered Securities as shall be
made with the approval of the Trustee shall constitute a sufficient notification
to such Holders for every purpose hereunder.

     Except as otherwise expressly provided herein or otherwise specified with
respect to any Securities pursuant to Section 3.01, where this Indenture
provides for notice to Holders of Bearer Securities of any event, such notice
shall be sufficiently given if published in an Authorized Newspaper in The City
of New York and in such other city or cities as may be specified in such
Securities on a Business Day, such publication to be not later than the latest
date, if any, and not earlier than the earliest date, if any, prescribed for the
giving of such notice. Any such notice shall be deemed to have been given on the
date of such publication or, if published more than once, on the date of the
first such publication.

     If by reason of the suspension of publication of any Authorized Newspaper
or Authorized Newspapers or by reason of any other cause it shall be
impracticable to publish any notice to Holders of Bearer Securities as provided
above, then such notification to Holders of Bearer Securities as shall be given
with the approval of the Trustee shall constitute sufficient notice to such
Holders for every purpose hereunder. Neither the failure to give notice by
publication to any particular Holder of Bearer Securities as provided above, nor
any defect in any notice so published, shall affect the sufficiency of such
notice with respect to other Holders of Bearer Securities or the sufficiency of
any notice to Holders of Registered Securities given as provided herein.

                                       15
<Page>

     Any request, demand, authorization, direction, notice, consent or waiver
required or permitted under this Indenture shall be in the English language,
except that any published notice may be in an official language of the country
of publication.

     Where this Indenture provides for notice in any manner, such notice may be
waived in writing by the Person entitled to receive such notice, either before
or after the event, and such waiver shall be the equivalent of such notice.
Waivers of notice by Holders shall be filed with the Trustee, but such filing
shall not be a condition precedent to the validity of any action taken in
reliance upon such waiver.

     SECTION 1.07. COUNTERPARTS; EFFECT OF HEADINGS AND TABLE OF CONTENTS. This
Indenture may be executed in any number of counterparts, each of which so
executed shall be deemed to be an original, but all such counterparts shall
together constitute but one and the same Indenture. The Article and Section
headings herein and the Table of Contents are for convenience only and shall not
affect the construction hereof.

     SECTION 1.08. SUCCESSORS AND ASSIGNS. All covenants and agreements in this
Indenture by the Company shall bind its successors and assigns, whether so
expressed or not.

     SECTION 1.09. SEVERABILITY CLAUSE. In case any provision in this Indenture
or in any Security or coupon shall be held invalid, illegal or unenforceable,
the validity, legality and enforceability of the remaining provisions shall not
in any way be affected or impaired thereby.

     SECTION 1.10. BENEFITS OF INDENTURE. Nothing in this Indenture or in the
Securities or coupons, if any, express or implied, shall give to any Person,
other than the parties hereto, any Security Registrar, any Paying Agent, any
Authenticating Agent and their successors hereunder and the Holders any benefit
or any legal or equitable right, remedy or claim under this Indenture.

     SECTION 1.11. GOVERNING LAW. This Indenture and the Securities and coupons
shall be governed by and construed in accordance with the laws of the State of
New York. This Indenture is subject to the provisions of the TIA that are
required to be part of this Indenture and shall, to the extent applicable, be
governed by such provisions.

     SECTION 1.12. NON-BUSINESS DAY. In any case where any Interest Payment
Date, Redemption Date, Repayment Date, sinking fund payment date, Stated
Maturity or Maturity of any Security or the last date on which a Holder has the
right to exchange a Security shall not be a Business Day at any Place of
Payment, then (notwithstanding any other provision of this Indenture or any
Security or coupon other than a provision in the Securities of any series which
specifically states that such provision shall apply in lieu hereof), payment of
interest, if any, or principal (and premium or Make-Whole Amount, if any) or
exchange of such Security need not be made at such Place of Payment on such
date, but (except as otherwise provided in the supplemental indenture with
respect to such Security) may be made on the next succeeding Business Day at
such Place of Payment with the same force and effect as if made on the Interest
Payment Date, Redemption Date, Repayment Date or sinking fund payment date, or
at the Stated Maturity or Maturity, or on such last day for exchange, provided
that no interest shall accrue on the amount so payable for the period from and
after such Interest Payment Date, Redemption

                                       16
<Page>

Date, Repayment Date, sinking fund payment date, Stated Maturity or Maturity, as
the case may be.

     SECTION 1.13. LIMITED LIABILITY; IMMUNITY OF PARTNERS, STOCKHOLDERS,
DIRECTORS, OFFICERS AND AGENTS OF THE COMPANY AND BOSTON PROPERTIES.
Notwithstanding any other provision of this Indenture or of the Securities of
any series to the contrary, no recourse under or upon any obligation, covenant
or agreement contained in this Indenture or in any Security, or for the payment
of any sums due on account of any indebtedness evidenced thereby, including
without limitation principal, premium or interest, if any, or for any claim
based on this Indenture or any Security or otherwise in respect of this
Indenture or any Security, shall be had, whether by levy or execution or
otherwise, against any past, present or future partner of the Company, whether
limited or general, including Boston Properties, as general partner, or any
successor of any such partner or any such partner's or successor's assets or
against any stockholder, principal or member of such partner or successor, or
any employee, officer, director or agent of any of the foregoing, as such, or of
any successor, either directly or through the Company or any successor, under
any rule of law, statute, constitutional provision or by the enforcement of any
assessment or penalty, or by any legal or equitable proceeding or otherwise, nor
shall any such parties be personally liable for any such amounts, obligations or
claims, or liable for any deficiency judgment based thereon or with respect
thereto, it being expressly understood that the sole remedies hereunder or under
any other document with respect to the Securities against such parties with
respect to such amounts, obligations or claims shall be against the Company and
that all such liability of and recourse against such parties is expressly waived
and released by the acceptance of the Securities by the Holders and as part of
the consideration for the issue of the Securities.

     SECTION 1.14. CONFLICT WITH TRUST INDENTURE ACT. If any provision hereof
limits, qualifies or conflicts with another provision hereof which is required
or deemed to be included in this Indenture by any of the provisions of the Trust
Indenture Act, such required provision shall control. If any provision of this
Indenture modifies or excludes any provision of the Trust Indenture Act that may
be so modified or excluded, the latter provision shall be deemed to apply to
this Indenture as so modified or to be excluded, as the case may be.

                         ARTICLE TWO - SECURITIES FORMS

     SECTION 2.01. FORMS OF SECURITIES. The Registered Securities, if any, of
each series and the Bearer Securities, if any, of each series and related
coupons shall be substantially in the form of Exhibit A hereto or in such other
form as shall be established in one or more indentures supplemental hereto or
approved from time to time by or pursuant to a Board Resolution in accordance
with Section 3.01, shall have such appropriate insertions, omissions,
substitutions and other variations as are required or permitted by this
Indenture or any indenture supplemental hereto, and may have such letters,
numbers or other marks of identification or designation and such legends or
endorsements placed thereon as the Company may deem appropriate and as are not
inconsistent with the provisions of this Indenture, or as may be required to
comply with any law or with any rule or regulation made pursuant thereto or with
any rule or regulation of any stock exchange automated quotation system, or
clearing agency, or to conform to usage.

                                       17
<Page>

     Unless otherwise specified as contemplated by Section 3.01, Bearer
Securities shall have interest coupons attached.

     The definitive Securities and coupons shall be printed, lithographed or
engraved or produced by any combination of these methods on a steel engraved
border or steel engraved borders or mechanically reproduced on safety paper or
may be produced in any other manner, all as determined by the officers executing
such Securities or coupons, as evidenced by their execution of such Securities
or coupons.

     SECTION 2.02. FORM OF TRUSTEE'S CERTIFICATE OF AUTHENTICATION. Subject to
Section 6.11, the Trustee's certificate of authentication shall be in
substantially the following form:

     This is one of the Securities of the series designated therein referred to
in the within-mentioned Indenture.

                                        [_________________________________],
                                        as Trustee

Dated:                                  By:
      --------------------------------     -------------------------------------
      --------------------------------        Authorized Signatory

     SECTION 2.03. SECURITIES ISSUABLE IN GLOBAL FORM. If Securities of or
within a series are issuable in the form of one or more Global Securities, then,
notwithstanding clause (8) of Section 3.01 and the provisions of Section 3.02,
any such Global Security or Securities may provide that it or they shall
represent the aggregate amount of all Outstanding Securities of such series (or
such lesser amount as is permitted by the terms thereof) from time to time
endorsed thereon and may also provide that the aggregate amount of Outstanding
Securities of such series represented thereby may from time to time be increased
or decreased to reflect exchanges. Any endorsement of any Global Security to
reflect the amount, or any increase or decrease in the amount, or changes in the
rights of Holders thereof, of Outstanding Securities represented thereby shall
be made (or caused to be made) by the Trustee in such manner or by such Person
or Persons as shall be specified therein or in the Company Order to be delivered
to the Trustee pursuant to Section 3.03 or 3.04. Subject to the provisions of
Section 3.03 and, if applicable, Section 3.04, the Trustee shall deliver and
redeliver any Global Security in permanent global form in the manner and upon
instructions given by the Person or Persons specified therein or in the
applicable Company Order. If a Company Order pursuant to Section 3.03 or 3.04
has been, or simultaneously is, delivered, any instructions by the Company with
respect to endorsement or delivery or redelivery of a Global Security shall be
in writing but need not comply with Section 1.02 and need not be accompanied by
an Opinion of Counsel.

     The provisions of the last sentence of Section 3.03 shall apply to any
Security represented by a Global Security if such Security was never issued and
sold by the Company and the Company delivers to the Trustee the Global Security
together with written instructions (which need not comply with Section 1.02 and
need not be accompanied by an Opinion of Counsel) with regard to the reduction
in the principal amount of Securities represented thereby, together with the
written statement contemplated by the last sentence of Section 3.03.

                                       18
<Page>

     Notwithstanding the provisions of Section 3.07, unless otherwise specified
as contemplated by Section 3.01, payment of principal of and any premium or
Make-Whole Amount, if any, and interest, if any, on any Global Security in
permanent global form shall be made to the registered Holder thereof.

     Notwithstanding the provisions of Section 3.08 and except as provided in
the preceding paragraph, the Company, the Trustee and any agent of the Company
and the Trustee shall treat as the Holder of such principal amount of
Outstanding Securities represented by a permanent Global Security (i) in the
case of a permanent Global Security in registered form, the Holder of such
permanent Global Security in registered form, or (ii) in the case of a permanent
Global Security in bearer form, Euroclear or Clearstrem.

     Any Global Security authenticated and delivered hereunder shall bear a
legend in substantially the following form:

          "This Security is a Global Security within the meaning set forth in
          the Indenture hereinafter referred to and is registered in the name of
          a Depository or a nominee of a Depository. This Security is
          exchangeable for Securities registered in the name of a person other
          than the Depository or its nominee only in the limited circumstances
          described in the Indenture, and may not be transferred except as a
          whole by the Depository to a nominee of the Depository or by a nominee
          of the Depository to the Depository or another nominee of the
          Depository or by the Depository or its nominee to a successor
          Depository or its nominee."

                         ARTICLE THREE - THE SECURITIES

     SECTION 3.01. AMOUNT UNLIMITED; ISSUABLE IN SERIES. The aggregate principal
amount of Securities which may be authenticated and delivered under this
Indenture is unlimited.

     The Securities may be issued in one or more series, each of which shall be
authorized pursuant to Board Resolutions of Boston Properties. There shall be
established in one or more Board Resolutions or pursuant to authority granted by
one or more Board Resolutions and, subject to Section 3.03, set forth in an
Officers' Certificate, or established in one or more indentures supplemental
hereto, prior to the issuance of Securities of any series:

          (1)       the title of the Securities of the series, including "CUSIP"
     numbers (which shall distinguish the Securities of such series from all
     other series of Securities);

          (2)       any limit upon the aggregate principal amount of the
     Securities of the series that may be authenticated and delivered under this
     Indenture (except for Securities authenticated and delivered upon
     registration of transfer of, or in exchange for, or in lieu of, other
     Securities of the series pursuant to Section 3.04, 3.05, 3.06, 9.06, 11.07
     or 13.05) and the minimum authorized denominations with respect to the
     Securities of such series;

                                       19
<Page>

          (3)       the price (expressed as a percentage of the principal amount
     thereof) at which such Securities will be issued and, if other than the
     principal amount thereof, the portion of the principal amount thereof
     payable upon declaration of acceleration of the maturity thereof, pursuant
     to Section 5.02;

          (4)       the date or dates, or the method for determining such date
     or dates, on which the principal of such Securities will be payable;

          (5)       the rate or rates (which may be fixed or variable), or the
     method by which such rate or rates shall be determined, at which such
     Securities will bear interest, if any;

          (6)       the date or dates, or the method for determining such date
     or dates, from which any such interest will accrue, the Interest Payment
     Dates on which any such interest will be payable, the Regular Record Dates
     for such Interest Payment Dates, or the method by which such dates shall be
     determined, the Persons to whom such interest, if any, shall be payable,
     and the basis upon which interest shall be calculated if other than that of
     a 360-day year of twelve 30-day months;

          (7)       the Make-Whole Amount, if any, or method for determining the
     Make-Whole Amount, if any, payable with respect to such Securities, and the
     terms upon which such amount, if any, will be payable;

          (8)       the place or places where the principal of (and premium or
     Make-Whole Amount, if any) and interest, if any, on such Securities will be
     payable, where such Securities may be surrendered for registration of
     transfer or exchange and where notices or demands to or upon the Company in
     respect of such Securities and this Indenture may be served;

          (9)       the period or periods, if any, within which, the price or
     prices at which and the other terms and conditions upon which such
     Securities may, pursuant to any optional or mandatory redemption
     provisions, be redeemed, as a whole or in part, at the option of the
     Company;

          (10)      the obligation, if any, of the Company to redeem, repay or
     purchase such Securities pursuant to any sinking fund or analogous
     provision or at the option of a Holder thereof, and the period or periods
     within which, the price or prices at which and the other terms and
     conditions upon which such Securities will be redeemed, repaid or
     purchased, as a whole or in part, pursuant to such obligation;

          (11)      if other than Dollars, the currency or currencies in which
     such Securities are denominated and payable, which may be a foreign
     currency or units of two or more foreign currencies or a composite currency
     or currencies, the manner of determining the equivalent thereof in Dollars
     for purposes of the definition of "OUTSTANDING" in Section 1.01, and the
     terms and conditions relating thereto;

          (12)      whether the amount of payments of principal of (and premium
     or Make-Whole Amount, if any, including any amount due upon redemption, if
     any) or interest, if any, on such Securities may be determined with
     reference to an index, formula or other

                                       20
<Page>

     method (which index, formula or method may, but need not be, based on the
     yield on or trading price of other securities, including United States
     Treasury securities or on a currency, currencies, currency unit or units,
     or composite currency or currencies) and the manner in which such amounts
     shall be determined;

          (13)      whether the principal of (and premium or Make-Whole Amount,
     if any) or interest, if any, on the Securities of the series are to be
     payable, at the election of the Company or a Holder thereof, in a currency
     or currencies, currency unit or units or composite currency or currencies
     other than that in which such Securities are denominated or stated to be
     payable, the period or periods within which, and the terms and conditions
     upon which, such election may be made, and the time and manner of, and
     identity of the exchange rate agent with responsibility for, determining
     the exchange rate between the currency or currencies, currency unit or
     units or composite currency or currencies in which such Securities are
     denominated or stated to be payable and the currency or currencies,
     currency unit or units or composite currency or currencies in which such
     Securities are to be so payable;

          (14)      provisions, if any, granting special rights to the Holders
     of Securities of the series upon the occurrence of such events as may be
     specified;

          (15)      any deletions from, modifications of or additions to the
     Events of Default or covenants of the Company with respect to Securities of
     the series, whether or not such Events of Default or covenants are
     consistent with the Events of Default or covenants set forth herein;

          (16)      whether and under what circumstances the Company will pay
     any additional amounts on such Securities in respect of any tax, assessment
     or governmental charge and, if so, whether the Company will have the option
     to redeem such Securities in lieu of making such payment;

          (17)      whether Securities of the series are to be issuable as
     Registered Securities, Bearer Securities (with or without coupons) or both,
     any restrictions applicable to the offer, sale or delivery of Bearer
     Securities and the terms upon which Bearer Securities of the series may be
     exchanged for Registered Securities of the series and vice versa (if
     permitted by applicable laws and regulations), whether any Securities of
     the series are to be issuable initially in temporary global form and
     whether any Securities of the series are to be issuable in permanent global
     form with or without coupons and, if so, whether beneficial owners of
     interests in any such permanent global Security may, or shall be required
     to, exchange such interests for Securities of such series and of like tenor
     of any authorized form and denomination and the circumstances under which
     any such exchanges may, or shall be required to, occur, if other than in
     the manner provided in the Indenture, and, if Registered Securities of the
     series are to be issuable as a Global Security, the identity of the
     depository for such series;

          (18)      the date as of which any Bearer Securities of the series and
     any temporary Global Security representing outstanding Securities of the
     series shall be dated if other than the date of original issuance of the
     first Security of the series to be issued;

                                       21
<Page>

          (19)      the Person to whom interest, if any, on any Registered
     Security of the series shall be payable, if other than the Person in whose
     name that Security (or one or more Predecessor Securities) is registered at
     the close of business on the Regular Record Date for such interest, if any,
     the manner in which, or the Person to whom, any interest on any Bearer
     Security of the series shall be payable, if otherwise than upon
     presentation and surrender of the coupons appertaining thereto as they
     severally mature, and the extent to which, or the manner in which,
     interest, if any, payable on a temporary Global Security on an Interest
     Payment Date will be paid if other than in the manner provided herein;
     PROVIDED, HOWEVER, in each case, that the manner of determining such Person
     or making such payment shall be acceptable to the Trustee (as not imposing
     on it any undue administrative burden or risk of liability);

          (20)      the applicability, if any, of the defeasance and covenant
     defeasance provisions of Article Fourteen hereof to the Securities of the
     series;

          (21)      if the Securities of such series are to be issuable in
     definitive form (whether upon original issue or upon exchange of a
     temporary Security of such series) only upon receipt of certain
     certificates or other documents or satisfaction of other conditions, then
     the form and/or terms of such certificates, documents or conditions;

          (22)      designation of the Trustee, if different from the Trustee
     under the Indenture, with respect to such series and the terms applicable
     to such Trustee (which shall be accepted by such Trustee by its execution
     and delivery of a supplemental indenture as provided therein); and

          (23)      any other terms of the series (which terms shall not be
     inconsistent with the provisions of this Indenture).

     All Securities of any one series and the coupons appertaining to any Bearer
Securities of such series shall be substantially identical except, in the case
of Registered Securities, as to denomination and except as may otherwise be
provided in or pursuant to such Board Resolution (subject to Section 3.03) and
set forth in such Officers' Certificate or in any such indenture supplemental
hereto. All Securities of any one series need not be issued at the same time
and, unless otherwise provided, a series may be reopened, without the consent of
the Holders, for issuances of additional Securities of such series.

     If any of the terms of the Securities of any series are established by
action taken pursuant to one or more Board Resolutions, a copy of an appropriate
record of such action(s) shall be certified by the Secretary or an Assistant
Secretary of Boston Properties and delivered to the Trustee at or prior to the
delivery of the Officers' Certificate setting forth the terms of the Securities
of such series.

     SECTION 3.02. DENOMINATIONS. The Securities of each series shall be
issuable in such denominations as shall be specified as contemplated by Section
3.01. With respect to Securities of any series denominated in Dollars, in the
absence of any such provisions with respect to the Securities of any series, the
Securities of such series, other than Global Securities (which may be of any
denomination), shall be issuable in denominations of $1,000 and any integral
multiple

                                       22
<Page>

thereof or the equivalent amounts thereof in the case of Securities denominated
in the Foreign Currency or currency unit.

     SECTION 3.03. EXECUTION, AUTHENTICATION, DELIVERY AND DATING. The
Securities and any coupons appertaining thereto shall be executed on behalf of
the Company by the Chairman of the Board, the President or one of the Vice
Presidents of Boston Properties, under its corporate seal reproduced thereon,
and attested by its Secretary or one of its Assistant Secretaries. The signature
of any of these officers on the Securities and coupons may be manual or
facsimile signatures of the present or any future such authorized officer and
may be imprinted or otherwise reproduced on the Securities.

     Securities and coupons bearing the manual or facsimile signatures of
individuals who were at any time the proper officers of Boston Properties shall
bind the Company, notwithstanding that such individuals or any of them have
ceased to hold such offices prior to the authentication and delivery of such
Securities or did not hold such offices at the date of such Securities or
coupons.

     At any time and from time to time after the execution and delivery of this
Indenture, the Company may deliver Securities of any series, together with any
coupon appertaining thereto, executed by the Company to the Trustee for
authentication, together with a Company Order for the authentication and
delivery of such Securities (accompanied by a copy of the Board Resolution and
the Officers' Certificate or supplemental indenture contemplated by Section
3.01), and the Trustee in accordance with the Company Order shall authenticate
and deliver such Securities; PROVIDED, HOWEVER, that, in connection with its
original issuance, no Bearer Security shall be mailed or otherwise delivered to
any location in the United States; and PROVIDED FURTHER that, unless otherwise
specified with respect to any series of Securities pursuant to Section 3.01, a
Bearer Security may be delivered in connection with its original issuance only
if the Person entitled to receive such Bearer Security shall have furnished a
certificate to Euroclear or Clearstream, as the case may be, in the form set
forth in EXHIBIT B-1 to this Indenture or such other certificate as may be
specified by the Company with respect to any series of Securities pursuant to
Section 3.01, dated no earlier than 15 days prior to the earlier of the date on
which such Bearer Security is delivered and the date on which any temporary
Security first becomes exchangeable for such Bearer Security in accordance with
the terms of such temporary Security and this Indenture. If any Security shall
be represented by a permanent Global Security, then, for purposes of this
Section and Section 3.04, the notation of a beneficial owner's interest therein
upon original issuance of such Security or upon exchange of a portion of a
temporary Global Security shall be deemed to be delivery in connection with its
original issuance of such beneficial owner's interest in such permanent Global
Security. Except as permitted by Section 3.06, the Trustee shall not
authenticate and deliver any Bearer Security unless all appurtenant coupons for
interest then matured have been detached and canceled.

     If all the Securities of any series are not to be issued at one time and if
the Board Resolution or supplemental indenture establishing such series shall so
permit, such Company Order may set forth procedures acceptable to the Trustee
for the issuance of such Securities and determining the terms of particular
Securities of such series, such as interest rate or formula, maturity date, date
of issuance and date from which interest shall accrue. In authenticating such
Securities, and accepting the additional responsibilities under this Indenture
in relation to such

                                       23
<Page>

Securities, the Trustee shall be provided with, and (subject to TIA Section
315(a) through 315(d)) shall be fully protected in relying upon,

                    (i)       an Opinion of Counsel stating that

                              (a)  the form or forms of such Securities and any
          coupons have been established in conformity with the provisions of
          this Indenture;

                              (b)  the terms of such Securities and any coupons
          have been established in conformity with the provisions of this
          Indenture; and

                              (c)  such Securities, together with any coupons
          appertaining thereto, when completed by appropriate insertions and
          executed and delivered by the Company to the Trustee for
          authentication in accordance with this Indenture, authenticated and
          delivered by the Trustee in accordance with this Indenture and issued
          by the Company in the manner and subject to any conditions specified
          in such Opinion of Counsel, will constitute legal, valid and legally
          binding obligations of the Company, enforceable in accordance with
          their terms, subject to applicable bankruptcy, insolvency, fraudulent
          transfer, reorganization and other similar laws of general
          applicability relating to or affecting the enforcement of creditors'
          rights generally and to general equitable principles; and

                    (ii)      an Officers' Certificate stating that all
     conditions precedent provided for in this Indenture relating to the
     issuance of the Securities have been complied with and that, to the best of
     the knowledge of the signers of such certificate, that no Event of Default
     with respect to any of the Securities shall have occurred and be
     continuing.

     If such form or terms have been so established, the Trustee shall not be
required to authenticate such Securities (or to enter into the related
supplemental indenture, if applicable) if the issue of such Securities pursuant
to this Indenture will affect the Trustee's own rights, duties, obligations or
immunities under the Securities and this Indenture or otherwise in a manner
which is not reasonably acceptable to the Trustee.

     Notwithstanding the provisions of Section 3.01 and of the preceding
paragraph, if all the Securities of any series are not to be issued at one time,
it shall not be necessary to deliver an Officers' Certificate otherwise required
pursuant to Section 3.01 or a Company Order, or an Opinion of Counsel or an
Officers' Certificate otherwise required pursuant to the preceding paragraph at
the time of issuance of each Security of such series, but such order, opinion
and certificates, with appropriate modifications to cover such future issuances,
shall be delivered at or before the time of issuance of the first Security of
such series.

     Each Registered Security shall be dated the date of its authentication and
each Bearer Security shall be dated as of the date specified as contemplated by
Section 3.01.

     No Security or coupon shall be entitled to any benefit under this Indenture
or be valid or obligatory for any purpose unless there appears on such Security
or Security to which such coupon appertains a certificate of authentication
substantially in the form provided for herein

                                       24
<Page>

duly executed by the Trustee (subject to Section 6.11) by manual signature of an
authorized signatory, and such certificate upon any Security shall be conclusive
evidence, and the only evidence, that such Security has been duly authenticated
and delivered hereunder and is entitled to the benefits of this Indenture.
Notwithstanding the foregoing, if any Security (including a Global Security)
shall have been authenticated and delivered hereunder but never issued and sold
by the Company, and the Company shall deliver such Security to the Trustee for
cancellation as provided in Section 3.09 together with a written statement
(which need not comply with Section 1.02 and need not be accompanied by an
Opinion of Counsel) stating that such Security has never been issued and sold by
the Company, for all purposes of this Indenture such Security shall be deemed
never to have been authenticated and delivered hereunder and shall never be
entitled to the benefits of this Indenture.

     SECTION 3.04. TEMPORARY SECURITIES.

          (a)  Pending the preparation of definitive Securities of any series,
the Company may execute, and upon Company Order the Trustee shall authenticate
and deliver, temporary Securities which are printed, lithographed, typewritten,
mimeographed or otherwise produced, in any authorized denomination,
substantially of the tenor of the definitive Securities in lieu of which they
are issued, in registered form, or, if authorized, in bearer form with one or
more coupons or without coupons, and with such appropriate insertions,
omissions, substitutions and other variations as the officers executing such
Securities may determine, as conclusively evidenced by their execution of such
Securities. In the case of Securities of any series, such temporary Securities
may be in global form.

     Except in the case of temporary Global Securities (which shall be exchanged
as otherwise provided herein or as otherwise provided in or pursuant to a Board
Resolution or supplemental indenture pursuant to Section 3.01), if temporary
Securities of any series are issued, the Company will cause definitive
Securities of that series to be prepared without unreasonable delay. After the
preparation of definitive Securities of such series, the temporary Securities of
such series shall be exchangeable for definitive Securities of such series upon
surrender of the temporary Securities of such series at the office or agency of
the Company in a Place of Payment for that series, without charge to the Holder.
Upon surrender for cancellation of any one or more temporary Securities of any
series (accompanied by any non-matured coupons appertaining thereto), the
Company shall execute (in accordance with a Company Order delivered at or prior
to the authentication of the first definitive security to such series) and the
Trustee shall authenticate and deliver in exchange therefor a like principal
amount of definitive Securities of the same series of authorized denominations;
PROVIDED, HOWEVER, that no definitive Bearer Security shall be delivered in
exchange for a temporary Registered Security; and PROVIDED FURTHER that a
definitive Bearer Security shall be delivered in exchange for a temporary Bearer
Security only in compliance with the conditions set forth in Section 3.03. Until
so exchanged, the temporary Securities of any series shall in all respects be
entitled to the same benefits under this Indenture as definitive Securities of
such series.

          (b)  Unless otherwise provided in or pursuant to a Board Resolution or
supplemental indenture pursuant to Section 3.01, the following provisions of
this Section 3.04(b) shall govern the exchange of temporary Securities other
than through the facilities of DTC. If any such temporary Security is issued in
global form, then such temporary Global Security shall,

                                       25
<Page>

unless otherwise provided therein, be delivered to the London office of a
depository or common depository upon and pursuant to written direction of the
Company (the "COMMON DEPOSITORY"), for the benefit of Euroclear and Clearstream,
for credit to the respective accounts of the beneficial owners of such
Securities (or to such other accounts as they may direct).

     Without unnecessary delay but in any event not later than the date
specified in, or determined pursuant to the terms of, any such temporary Global
Security (the "EXCHANGE DATE"), the Company shall deliver to the Trustee
definitive Securities, in aggregate principal amount equal to the principal
amount of such temporary Global Security, executed by the Company. On or after
the Exchange Date, such temporary Global Security shall be surrendered by the
Common Depository to the Trustee, as the Company's agent for such purpose, to be
exchanged, in whole or from time to time in part, for definitive Securities
without charge, and the Trustee shall authenticate and deliver, in exchange for
each portion of such temporary Global Security, an equal aggregate principal
amount of definitive Securities of the same series of authorized denominations
and of like tenor as the portion of such temporary Global Security to be
exchanged. The definitive Securities to be delivered in exchange for any such
temporary Global Security shall be in bearer form, registered form, permanent
global bearer form or permanent global registered form, or any combination
thereof, as specified as contemplated by Section 3.01, and, if any combination
thereof is so specified, as requested by the beneficial owner thereof (as
directed by or pursuant to information provided by the Common Depository);
PROVIDED, HOWEVER, that, unless otherwise specified in such temporary Global
Security, upon such presentation by the Common Depository, such temporary Global
Security shall be accompanied by a certificate dated the Exchange Date or a
subsequent date and signed by Euroclear as to the portion of such temporary
Global Security held for its account then to be exchanged and a certificate
dated the Exchange Date or a subsequent date and signed by Clearstream as to the
portion of such temporary Global Security held for its account then to be
exchanged, each in the form set forth in EXHIBIT B-2 to this Indenture or in
such other form as may be established pursuant to Section 3.01; and PROVIDED
FURTHER that definitive Bearer Securities shall be delivered in exchange for a
portion of a temporary Global Security only in compliance with the requirements
of Section 3.03.

     Unless otherwise specified in such temporary Global Security, the interest
of a beneficial owner of Securities of a series in a temporary Global Security
shall be exchanged for definitive Securities of the same series and of like
tenor following the Exchange Date when the account holder instructs Euroclear or
Clearstream, as the case may be, to request such exchange on his behalf and
delivers to Euroclear or Clearstream, as the case may be, a certificate in the
form set forth in EXHIBIT B-1 to this Indenture (or in such other form as may be
established pursuant to Section 3.01), dated no earlier than 15 days prior to
the Exchange Date, copies of which certificate shall be available from the
offices of Euroclear and Clearstream, the Trustee, any Authenticating Agent
appointed for such series of Securities and each Paying Agent. Unless otherwise
specified in such temporary Global Security, any such exchange shall be made
free of charge to the beneficial owners of such temporary Global Security,
except that a Person receiving definitive Securities must bear the cost of
insurance, postage, transportation and the like unless such Person takes
delivery of such definitive Securities in person at the offices of Euroclear or
Clearstream. Definitive Securities in bearer form to be delivered in exchange
for any portion of a temporary Global Security shall be delivered only to an
address located outside the United States.

                                       26
<Page>

     Until exchanged in full as hereinabove provided, the temporary Securities
of any series shall in all respects be entitled to the same benefits under this
Indenture as definitive Securities of the same series and of like tenor
authenticated and delivered hereunder, except that, unless otherwise specified
as contemplated by Section 3.01, interest, if any, payable on a temporary Global
Security on an Interest Payment Date for Securities of such series occurring
prior to the applicable Exchange Date shall be payable to Euroclear and
Clearstream on such Interest Payment Date upon delivery by Euroclear and
Clearstream to the Trustee of a certificate or certificates in the form set
forth in EXHIBIT B-2 to this Indenture (or in such other forms as may be
established pursuant to Section 3.01), for credit without further interest on or
after such Interest Payment Date to the respective accounts of Persons who are
the beneficial owners of such temporary Global Security on such Interest Payment
Date and who have each delivered to Euroclear or Clearstream, as the case may
be, a certificate dated no earlier than 15 days prior to the Interest Payment
Date occurring prior to such Exchange Date in the form set forth as EXHIBIT B-1
to this Indenture (or in such other forms as may be established pursuant to
Section 3.01). Notwithstanding anything to the contrary herein contained, the
certifications made pursuant to this paragraph shall satisfy the certification
requirements of the preceding two paragraphs of this Section 3.04(b) and of the
third paragraph of Section 3.03 of this Indenture and the interests of the
Persons who are the beneficial owners of the temporary Global Security with
respect to which such certification was made will be exchanged for definitive
Securities of the same series and of like tenor on the Exchange Date or the date
of certification if such date occurs after the Exchange Date, without further
act or deed by such beneficial owners. Except as otherwise provided in this
paragraph, no payments of principal or interest, if any, owing with respect to a
beneficial interest in a temporary Global Security will be made unless and until
such interest in such temporary Global Security shall have been exchanged for an
interest in a definitive Security. Any interest so received by Euroclear and
Clearstream and not paid as herein provided shall be returned to the Trustee
prior to the expiration of two years after such Interest Payment Date in order
to be repaid to the Company.

     With respect to Exhibit B-1 or B-2 to this Indenture, the Company may, in
its discretion and if required or desirable under applicable law, substitute one
or more other forms of such exhibits for such exhibits, eliminate the
requirement that any or all certificate be provided, or change the time that any
certificate may be required, PROVIDED THAT such substitute form or forms or
notice of elimination or change of such certification requirement have
theretofore been delivered to the Trustee with a Company Request and such form
or forms, elimination or change is reasonably acceptable to the Trustee.

     SECTION 3.05. REGISTRATION, REGISTRATION OF TRANSFER AND EXCHANGE. The
Company shall cause to be kept at the Corporate Trust Office of the Trustee or
in any office or agency of the Company in a Place of Payment a register for each
series of Securities (the registers maintained in such office or in any such
office or agency of the Company in a Place of Payment being herein sometimes
referred to collectively as the "SECURITY REGISTER") in which, subject to such
reasonable regulations as it may prescribe, the Company shall provide for the
registration of Registered Securities and of transfers of Registered Securities.
The Security Register shall be in written form or any other form capable of
being converted into written form within a reasonable time. The Trustee, at its
Corporate Trust Office, is hereby initially appointed "SECURITY REGISTRAR" for
the purpose of registering Registered Securities and transfers of Registered
Securities on such Security Register as herein provided. In the event that the
Trustee shall cease

                                       27
<Page>

to be Security Registrar, it shall have the right to examine, and be provided a
copy of, the Security Register at all reasonable times.

     Subject to the provisions of this Section 3.05, upon surrender for
registration of transfer of any Registered Security of any series at any office
or agency of the Company in a Place of Payment for that series, the Company
shall execute, and the Trustee shall authenticate and deliver, in the name of
the designated transferee or transferees, one or more new Registered Securities
of the same series, of any authorized denominations and of a like aggregate
principal amount, bearing a number not contemporaneously outstanding, and
containing identical terms and provisions.

     Subject to the provisions of this Section 3.05, at the option of the
Holder, Registered Securities of any series may be exchanged for other
Registered Securities of the same series, of any authorized denomination or
denominations and of a like aggregate principal amount, containing identical
terms and provisions, upon surrender of the Registered Securities to be
exchanged at any such office or agency. Whenever any such Registered Securities
are so surrendered for exchange, the Company shall execute, and the Trustee
shall authenticate and deliver, the Registered Securities which the Holder
making the exchange is entitled to receive. Unless otherwise specified with
respect to any series of Securities as contemplated by Section 3.01, Bearer
Securities may not be issued in exchange for Registered Securities.

     If (but only if) permitted by the applicable Board Resolution and (subject
to Section 3.03) set forth in the applicable Officers' Certificate, or in any
indenture supplemental hereto, delivered as contemplated by Section 3.01, at the
option of the Holder, Bearer Securities of any series may be exchanged for
Registered Securities of the same series of any authorized denominations and of
a like aggregate principal amount and tenor, upon surrender of the Bearer
Securities to be exchanged at any such office or agency, with all unmatured
coupons and all matured coupons in default thereto appertaining. If the Holder
of a Bearer Security is unable to produce any such unmatured coupon or coupons
or matured coupon or coupons in default, any such permitted exchange may be
effected if the Bearer Securities are accompanied by payment in funds acceptable
to the Company (or to the Trustee for the Security in case of matured coupons in
default) in an amount equal to the face amount of such missing coupon or
coupons, or the surrender of such missing coupon or coupons may be waived by the
Company and the Trustee if there is furnished to them such security or indemnity
as they may require to save each of them and any Paying Agent harmless. If
thereafter the Holder of such Security shall surrender to any Paying Agent any
such missing coupon in respect of which such a payment shall have been made,
such Holder shall be entitled to receive the amount of such payment; PROVIDED,
HOWEVER, that, except as otherwise provided in Section 10.02, interest, if any,
represented by coupons shall be payable only upon presentation and surrender of
those coupons at an office or agency located outside the United States.
Notwithstanding the foregoing, in case a Bearer Security of any series is
surrendered at any such office or agency in a permitted exchange for a
Registered Security of the same series and like tenor after the close of
business at such office or agency on (i) any Regular Record Date and before the
opening of business at such office or agency on the relevant Interest Payment
Date, or (ii) any Special Record Date and before the opening of business at such
office or agency on the related proposed date for payment of Defaulted Interest,
such Bearer Security shall be surrendered without the coupon relating to such
Interest Payment Date or proposed date for payment, as the case may be, and
interest, if any, or Defaulted Interest, as the

                                       28
<Page>

case may be, will not be payable on such Interest Payment Date or proposed date
for payment, as the case may be, in respect of the Registered Security issued in
exchange for such Bearer Security, but will be payable only to the Holder of
such coupon when due in accordance with the provisions of this Indenture.
Whenever any Securities are so surrendered for exchange, the Company shall
execute, and the Trustee shall authenticate and deliver, the Securities which
the Holder making the exchange is entitled to receive.

     Notwithstanding the foregoing, except as otherwise specified as
contemplated by Section 3.01, any permanent Global Security shall be
exchangeable only as provided in this paragraph. If the depository for any
permanent Global Security is DTC, then, unless the terms of such Global Security
expressly permit such Global Security to be exchanged in whole or in part for
definitive Securities, a Global Security may be transferred, in whole but not in
part, only to a nominee of DTC, or by a nominee of DTC to DTC, or to a successor
to DTC for such Global Security selected or approved by the Company or to a
nominee of such successor to DTC. If at any time DTC notifies the Company that
it is unwilling or unable to continue as depository for the applicable Global
Security or Securities or if at any time DTC ceases to be a clearing agency
registered under the Exchange Act, if so required by applicable law or
regulation, the Company shall appoint a successor depository with respect to
such Global Security or Securities. If (w) a successor depository for such
Global Security or Securities is not appointed by the Company within 90 days
after the Company receives such notice or becomes aware of such unwillingness,
inability or ineligibility, (x) the Company delivers to the Trustee for
Securities of such series in registered form a Company Order stating that the
Securities of such series shall be exchangeable, (y) an Event of Default has
occurred and is continuing and the beneficial owners representing a majority in
principal amount of the applicable series of Securities represented by such
Global Security or Securities advise DTC to cease acting as depository for such
Global Security or Securities or (z) the Company, in its sole discretion,
determines at any time that all Outstanding Securities (but not less than all)
of any series issued or issuable in the form of one or more Global Securities
shall no longer be represented by such Global Security or Securities, then the
Company shall execute, and the Trustee shall authenticate and deliver definitive
Securities of like series, rank, tenor and terms in definitive form in an
aggregate principal amount equal to the principal amount of such Global Security
or Securities. If any beneficial owner of an interest in a permanent global
Security is otherwise entitled to exchange such interest for Securities of such
series and of like tenor and principal amount of another authorized form and
denomination, as specified as contemplated by Section 3.01 and PROVIDED THAT any
applicable notice provided in the permanent Global Security shall have been
given, then without unnecessary delay but in any event not later than the
earliest date on which such interest may be so exchanged, the Company shall
execute, and the Trustee shall authenticate and deliver definitive Securities in
aggregate principal amount equal to the principal amount of such beneficial
owner's interest in such permanent Global Security. On or after the earliest
date on which such interests may be so exchanged, such permanent Global Security
shall be surrendered for exchange by DTC or such other depository as shall be
specified in the Company Order with respect thereto to the Trustee, as the
Company's agent for such purpose; PROVIDED, HOWEVER, that no such exchanges may
occur during a period beginning at the opening of business 15 days before any
selection of Securities to be redeemed and ending on the relevant Redemption
Date if the Security for which exchange is requested may be among those selected
for redemption; and PROVIDED FURTHER that no Bearer Security delivered in
exchange for a portion of a permanent Global Security shall be mailed or
otherwise delivered to any location in the United States. If a Registered
Security is issued in

                                       29
<Page>

exchange for any portion of a permanent Global Security after the close of
business at the office or agency where such exchange occurs on (i) any Regular
Record Date and before the opening of business at such office or agency on the
relevant Interest Payment Date, or (ii) any Special Record Date and the opening
of business at such office or agency on the related proposed date for payment of
Defaulted Interest, interest, if any, or Defaulted Interest, as the case may be,
will not be payable on such Interest Payment Date or proposed date for payment,
as the case may be, in respect of such Registered Security, but will be payable
on such Interest Payment Date or proposed date for payment, as the case may be,
only to the Person to whom interest, if any, in respect of such portion of such
permanent Global Security is payable in accordance with the provisions of this
Indenture.

     All Securities issued upon any registration of transfer or exchange of
Securities shall be the valid obligations of the Company, evidencing the same
debt, and entitled to the same benefits under this Indenture, as the Securities
surrendered upon such registration of transfer or exchange.

     Every Registered Security presented or surrendered for registration of
transfer or for exchange or redemption shall (if so required by the Company or
the Security Registrar) be duly endorsed, or be accompanied by a written
instrument of transfer in form satisfactory to the Company and the Security
Registrar, duly executed by the Holder thereof or his attorney duly authorized
in writing.

     No service charge shall be made for any registration of transfer or
exchange of Securities, but the Company may require payment of a sum sufficient
to cover any tax or other governmental charge that may be imposed in connection
with any registration of transfer or exchange of Securities, other than
exchanges pursuant to Section 3.04, 9.06, 11.07 or 13.05 not involving any
transfer.

     The Company or the Trustee, as applicable, shall not be required (i) to
issue, register the transfer of or exchange any Security if such Security may be
among those selected for redemption during a period beginning at the opening of
business 15 days before selection of the Securities to be redeemed under Section
11.03 and ending at the close of business on (A) if such Securities are issuable
only as Registered Securities, the day of the mailing of the relevant notice of
redemption and (B) if such Securities are issuable as Bearer Securities, the day
of the first publication of the relevant notice of redemption or, if such
Securities are also issuable as Registered Securities and there is no
publication, the mailing of the relevant notice of redemption, or (ii) to
register the transfer of or exchange any Registered Security so selected for
redemption in whole or in part, except, in the case of any Registered Security
to be redeemed in part, the portion thereof not to be redeemed, or (iii) to
exchange any Bearer Security so selected for redemption except that such a
Bearer Security may be exchanged for a Registered Security of that series and
like tenor, PROVIDED THAT such Registered Security shall be simultaneously
surrendered for redemption, or (iv) to issue, register the transfer of or
exchange any Security which has been surrendered for repayment at the option of
the Holder, except the portion, if any, of such Security not to be so repaid.

     Furthermore, notwithstanding any other provision of this Section 3.05, the
Company will not be required to exchange any Securities if, as a result of the
exchange, the Company would suffer adverse consequences under any United States
law or regulation.

                                       30
<Page>

     SECTION 3.06. MUTILATED, DESTROYED, LOST AND STOLEN SECURITIES. If any
mutilated Security or a Security with a mutilated coupon appertaining to it is
surrendered to the Trustee or the Company, together with, in proper cases, such
security or indemnity as may be required by the Company or the Trustee to save
each of them or any agent of either of them harmless, the Company shall execute
and the Trustee shall authenticate and deliver in exchange therefore a new
Security of the same series and principal amount, containing identical terms and
provisions and bearing a number not contemporaneously outstanding, with coupons
corresponding to the coupons, if any, appertaining to the surrendered Security.

     If there shall be delivered to the Company and to the Trustee (i) evidence
to their satisfaction of the destruction, loss or theft of any Security or
coupon, and (ii) such security or indemnity as may be required by them to save
each of them and any agent of either of them harmless, then, in the absence of
notice to the Company or the Trustee that such Security or coupon has been
acquired by a bona fide purchaser, the Company shall execute and upon its
request the Trustee shall authenticate and deliver, in lieu of any such
destroyed, lost or stolen Security or in exchange for the Security to which a
destroyed, lost or stolen coupon appertains (with all appurtenant coupons not
destroyed, lost or stolen), a new Security of the same series and principal
amount, containing identical terms and provisions and bearing a number not
contemporaneously outstanding, with coupons corresponding to the coupons, if
any, appertaining to such destroyed, lost or stolen Security or to the Security
to which such destroyed, lost or stolen coupon appertains.

     Notwithstanding the provisions of the previous two paragraphs, in case any
such mutilated, destroyed, lost or stolen Security or coupon has become or is
about to become due and payable, the Company in its discretion may, instead of
issuing a new Security, with coupons corresponding to the coupons, if any,
appertaining to such destroyed, lost or stolen Security or to the Security to
which such destroyed, lost or stolen coupon appertains, pay such Security or
coupon if the applicant for such payment shall furnish to the Company and the
Trustee for such Security such security or indemnity as may be required by them
to save each of them harmless, and in the case of destruction, loss or theft,
evidence satisfactory to the Company and Trustee and any agent of any of them of
the destruction, loss or theft of such Security and the ownership thereof;
PROVIDED, HOWEVER, that payment of principal of (and premium or Make-Whole
Amount, if any), and interest, if any, on, Bearer Securities shall, except as
otherwise provided in Section 10.02, be payable only at an office or agency
located outside the United States and, unless otherwise specified as
contemplated by Section 3.01, any interest on Bearer Securities shall be payable
only upon presentation and surrender of the coupons appertaining thereto.

     Upon the issuance of any new Security under this Section, the Company may
require the payment of a sum sufficient to cover any tax or other governmental
charge that may be imposed in relation thereto and any other expenses (including
the fees and expenses of the Trustee) connected therewith.

     Every new Security of any series with its coupons, if any, issued pursuant
to this Section in lieu of any destroyed, lost or stolen Security, or in
exchange for a Security to which a destroyed, lost or stolen coupon appertains,
shall constitute an original additional contractual obligation of the Company,
whether or not the destroyed, lost or stolen Security and its coupons, if any,
or the destroyed, lost or stolen coupon shall be at any time enforceable by
anyone, and

                                       31
<Page>

shall be entitled to all the benefits of this Indenture equally and
proportionately with any and all other Securities of that series and their
coupons, if any, duly issued hereunder.

     The provisions of this Section are exclusive and shall preclude (to the
extent lawful) all other rights and remedies with respect to the replacement or
payment of mutilated, destroyed, lost or stolen Securities or coupons.

     SECTION 3.07. PAYMENT OF INTEREST; INTEREST RIGHTS PRESERVED. Except as
otherwise specified with respect to a series of Securities in accordance with
the provisions of Section 3.01, interest, if any, on any Registered Security
that is payable, and is punctually paid or duly provided for, on any Interest
Payment Date shall be paid to the Person in whose name that Security (or one or
more Predecessor Securities) is registered at the close of business on the
Regular Record Date for such interest payment, if any, at the office or agency
of the Company maintained for such purpose pursuant to Section 10.02; PROVIDED,
HOWEVER, that each installment of interest on any Registered Security may at the
Company's option be paid by (i) mailing a check for such interest, if any,
payable to or upon the written order of the Person entitled thereto pursuant to
Section 3.08, to the address of such Person as it appears on the Security
Register or (ii) transfer to an account maintained by the payee located inside
the United States.

     Unless otherwise provided as contemplated by Section 3.01 with respect to
the Securities of any series, payment of interest, if any, may be made, in the
case of a Bearer Security, by transfer to an account maintained by the payee
with a bank located outside the United States.

     Unless otherwise provided as contemplated by Section 3.01, every permanent
Global Security will provide that interest, if any, payable on any Interest
Payment Date will be paid to DTC, Euroclear and/or Clearstream, as the case may
be, with respect to that portion of such permanent Global Security held for its
account by Cede & Co. or the Common Depository, as the case may be, for the
purpose of permitting such party to credit the interest received by it in
respect of such permanent Global Security to the accounts of the beneficial
owners thereof.

     In case a Bearer Security of any series is surrendered in exchange for a
Registered Security of such series after the close of business (at an office or
agency in a Place of Payment for such series) on any Regular Record Date and
before the opening of business (at such office or agency) on the next succeeding
Interest Payment Date, such Bearer Security shall be surrendered without the
coupon relating to such Interest Payment Date and interest will not be payable
on such Interest Payment Date in respect of the Registered Security issued in
exchange for such Bearer Security, but will be payable only to the Holder of
such coupon when due in accordance with the provisions of this Indenture.

     Except as otherwise specified with respect to a series of Securities in
accordance with the provisions of Section 3.01, interest, if any, on any
Registered Security of any series that is payable, but is not punctually paid or
duly provided for, on any Interest Payment Date (herein called "DEFAULTED
INTEREST") shall forthwith cease to be payable to the registered Holder thereof
on the relevant Regular Record Date by virtue of having been such Holder, and
such Defaulted Interest may be paid by the Company, at its election in each
case, as provided in clause (1) or (2) below:

                                       32
<Page>

          (1)       The Company may elect to make payment of any Defaulted
     Interest to the Persons in whose names the Registered Securities of such
     series (or their respective Predecessor Securities) are registered at the
     close of business on a Special Record Date for the payment of such
     Defaulted Interest, which shall be fixed in the following manner. The
     Company shall notify the Trustee in writing of the amount of Defaulted
     Interest proposed to be paid on each Registered Security of such series and
     the date of the proposed payment (which shall not be less than 20 days
     after such notice is received by the Trustee), and at the same time the
     Company shall deposit with the Trustee an amount of money in the currency
     or currencies, currency unit or units or composite currency or currencies
     in which the Securities of such series are payable (except as otherwise
     specified pursuant to Section 3.01 for the Securities of such series) equal
     to the aggregate amount proposed to be paid in respect of such Defaulted
     Interest or shall make arrangements satisfactory to the Trustee for such
     deposit on or prior to the date of the proposed payment, such money when
     deposited to be held in trust for the benefit of the Persons entitled to
     such Defaulted Interest as in this clause provided. Thereupon the Trustee
     shall fix a Special Record Date for the payment of such Defaulted Interest
     which shall be not more than 15 days and not less than 10 days prior to the
     date of the proposed payment and not less than 10 days after the receipt by
     the Trustee of the notice of the proposed payment. The Trustee shall
     promptly notify the Company of such Special Record Date and, in the name
     and at the expense of the Company, shall cause notice of the proposed
     payment of such Defaulted Interest and the Special Record Date therefor to
     be mailed, first-class postage prepaid, to each Holder of Registered
     Securities of such series at his address as it appears in the Security
     Register not less than 10 days prior to such Special Record Date. The
     Trustee may, in its discretion, in the name and at the expense of the
     Company, cause a similar notice to be published at least once in an
     Authorized Newspaper in each Place of Payment, but such publications shall
     not be a condition precedent to the establishment of such Special Record
     Date. Notice of the proposed payment of such Defaulted Interest and the
     Special Record Date therefor having been mailed as aforesaid, such
     Defaulted Interest shall be paid to the Persons in whose names the
     Registered Securities of such series (or their respective Predecessor
     Securities) are registered at the close of business on such Special Record
     Date and shall no longer be payable pursuant to the following clause (2).
     In case a Bearer Security of any series is surrendered at the office or
     agency in a Place of Payment for such series in exchange for a Registered
     Security of such series after the close of business at such office or
     agency on any Special Record Date and before the opening of business at
     such office or agency on the related proposed date for payment of Defaulted
     Interest, such Bearer Security shall be surrendered without the coupon
     relating to such proposed date of payment and Defaulted Interest will not
     be payable on such proposed date of payment in respect of the Registered
     Security issued in exchange for such Bearer Security, but will be payable
     only to the Holder of such coupon when due in accordance with the
     provisions of this Indenture.

          (2)       The Company may make payment of any Defaulted Interest on
     the Registered Securities of any series in any other lawful manner not
     inconsistent with the requirements of any securities exchange on which such
     Securities may be listed, and upon such notice as may be required by such
     exchange, if, after notice given by the

                                       33
<Page>

     Company to the Trustee of the proposed payment pursuant to this clause,
     such manner of payment shall be deemed practicable by the Trustee.

     Subject to the foregoing provisions of this Section and Section 3.05, each
Security delivered under this Indenture upon registration of transfer of or in
exchange for or in lieu of any other Security shall carry the rights to interest
accrued and unpaid, and to accrue, which were carried by such other Security.

     SECTION 3.08. PERSONS DEEMED OWNERS. Prior to due presentment of a
Registered Security for registration of transfer, the Company, the Trustee and
any agent of the Company or the Trustee may treat the Person in whose name such
Registered Security is registered as the owner of such Security for the purpose
of receiving payment of principal of (and premium or Make-Whole Amount, if any),
and (subject to Sections 3.05 and 3.07) interest, if any, on, such Registered
Security and for all other purposes whatsoever, whether or not such Registered
Security be overdue, and neither the Company, the Trustee nor any agent of the
Company or the Trustee shall be affected by notice to the contrary. All such
payments so made to any such Person, or upon such Person's order, shall be
valid, and, to the extent of the sum or sums so paid, effectual to satisfy and
discharge the liability for money payable upon any such Security.

     Title to any Bearer Security and any coupons appertaining thereto shall
pass by delivery. The Company, the Trustee and any agent of the Company or the
Trustee may treat the Holder of any Bearer Security and the Holder of any coupon
as the absolute owner of such Security or coupon for the purpose of receiving
payment thereof or on account thereof and for all other purposes whatsoever,
whether or not such Security or coupon be overdue, and neither the Company, the
Trustee nor any agent of the Company or the Trustee shall be affected by notice
to the contrary.

     No holder of any beneficial interest in any Global Security held on its
behalf by a depository shall have any rights under this Indenture with respect
to such Global Security and such depository (which is the Holder of such
security) shall be treated by the Company, the Trustee, and any agent of the
Company or the Trustee as the owner of such Global Security for all purposes
whatsoever. None of the Company, the Trustee, any Paying Agent or the Security
Registrar will have any responsibility or liability for any aspect of the
records relating to or payments made on account of beneficial ownership
interests of a Global Security or for maintaining, supervising or reviewing any
records relating to such beneficial ownership interests.

     Notwithstanding the foregoing, with respect to any Global Security, nothing
herein shall prevent the Company, the Trustee, or any agent of the Company or
the Trustee, from giving effect to any written certification, proxy or other
authorization furnished by any depository, as a Holder, with respect to such
Global Security or impair, as between such depository and owners of beneficial
interests in such Global Security, the operation of customary practices
governing the exercise of the rights of such depository (or its nominee) as
Holder of such Global Security.

     SECTION 3.09. CANCELLATION. All Securities and coupons surrendered for
payment, redemption, repayment at the option of the Holder, registration of
transfer or exchange or for credit against any sinking fund payment shall, if
surrendered to any Person other than the Trustee, be delivered to the Trustee,
and any such Securities and coupons and Securities and

                                       34
<Page>

coupons surrendered directly to the Trustee for any such purpose upon direction
by the Company shall be promptly cancelled by it. The Company may at any time
deliver to the Trustee for cancellation any Securities previously authenticated
and delivered hereunder which the Company may have acquired in any manner
whatsoever, and may deliver to the Trustee (or to any other Person for delivery
to the Trustee) for cancellation any Securities previously authenticated
hereunder which the Company has not issued and sold, and all Securities so
delivered shall be promptly cancelled by the Trustee. If the Company shall so
acquire any of the Securities, however, such acquisition shall not operate as a
redemption or satisfaction of the indebtedness represented by such Securities
unless and until the same are surrendered to the Trustee for cancellation. No
Securities shall be authenticated in lieu of or in exchange for any Securities
cancelled as provided in this Section, except as expressly permitted by this
Indenture. Cancelled Securities and coupons held by the Trustee shall be
disposed of by the Trustee in accordance with its customary practices (subject
to the record retention requirements of the Exchange Act).

     SECTION 3.10. COMPUTATION OF INTEREST. Except as otherwise specified as
contemplated by Section 3.01 with respect to Securities of any series, interest
on the Securities of each series shall be computed on the basis of a 360-day
year consisting of twelve 30-day months.

     SECTION 3.11. CUSIP NUMBERS. The Company in issuing the Securities may use
"CUSIP" numbers (if then generally in use), and, if so, the Trustee shall use
"CUSIP" numbers in notices of redemption as a convenience to Holders; PROVIDED,
HOWEVER, that any such notice may state that no representation is made as to the
correctness of such numbers either as printed on the Securities or as contained
in any notice of a redemption and that reliance may be placed only on the other
identification numbers printed on the Securities, and any such redemption shall
not be affected by any defect in or omission of such numbers. The Company will
promptly notify the Trustee of any change in the "CUSIP" numbers.

                    ARTICLE FOUR - SATISFACTION AND DISCHARGE

     SECTION 4.01. SATISFACTION AND DISCHARGE OF INDENTURE. This Indenture shall
upon Company Request cease to be of further effect with respect to any series of
Securities specified in such Company Request (except as to any surviving rights
of registration of transfer or exchange of Securities of such series herein
expressly provided for), and the Trustee, upon receipt of a Company Order, and
at the expense of the Company, shall execute instruments in form and substance
satisfactory to the Trustee and the Company acknowledging satisfaction and
discharge of this Indenture as to such series when

          (1)       either

                              (A)       all Securities of such series
                    theretofore authenticated and delivered and all coupons, if
                    any, appertaining thereto (other than (i) coupons
                    appertaining to Bearer Securities surrendered for exchange
                    for Registered Securities and maturing after such exchange,
                    whose surrender is not required or has been waived as
                    provided in Section 3.05, (ii) Securities and coupons of
                    such series which have been destroyed, lost or stolen and
                    which have been replaced or paid as provided in Section
                    3.06, (iii) coupons appertaining to Securities called for
                    redemption and

                                       35
<Page>

                    maturing after the relevant Redemption Date, whose surrender
                    has been waived as provided in Section 11.06, and (iv)
                    Securities and coupons of such series for whose payment
                    money has theretofore been deposited in trust or segregated
                    and held in trust by the Company and thereafter repaid to
                    the Company or discharged from such trust, as provided in
                    Section 10.03) have been delivered to the Trustee for
                    cancellation; or

                              (B)       all Securities of such series and, in
                    the case of (i) or (ii) below, any coupons appertaining
                    thereto not theretofore delivered to the Trustee for
                    cancellation

                                        (i)       have become due and payable,
                         or

                                        (ii)      will become due and payable at
                         their Stated Maturity within one year, or

                                        (iii)     if redeemable at the option of
                         the Company, are to be called for redemption within one
                         year under arrangements satisfactory to the Trustee for
                         the giving of notice of redemption by the Trustee in
                         the name, and at the expense, of the Company,

                    and the Company, in the case of (i), (ii) or (iii) above,
                    has irrevocably deposited or caused to be deposited with the
                    Trustee as trust funds in trust for the purpose an amount in
                    the currency or currencies, currency unit or units or
                    composite currency or currencies in which the Securities of
                    such series are payable, sufficient to pay and discharge the
                    entire indebtedness on such Securities and such coupons not
                    theretofore delivered to the Trustee for cancellation, for
                    principal (and premium or Make-Whole Amount, if any) and
                    interest, if any, to the date of such deposit (in the case
                    of Securities which have become due and payable) or to the
                    Stated Maturity or Redemption Date, as the case may be;

          (2)       the Company has paid or caused to be paid all other sums
     payable hereunder by the Company; and

          (3)       the Company has delivered to the Trustee an Officers'
     Certificate and an Opinion of Counsel, each stating that all conditions
     precedent herein provided for relating to the satisfaction and discharge of
     this Indenture as to such series have been complied with.

Notwithstanding the satisfaction and discharge of this Indenture, the
obligations of the Company to the Trustee and any predecessor Trustee under
Section 6.06, the obligations of the Company to any Authenticating Agent under
Section 6.11 and, if money shall have been deposited with and held by the
Trustee pursuant to subclause (B) of clause (1) of this Section, the obligations
of the Trustee under Section 4.02 and the last paragraph of Section 10.03 shall
survive such satisfaction and discharge.

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<Page>

     SECTION 4.02. APPLICATION OF TRUST FUNDS. Subject to the provisions of the
last paragraph of Section 10.03, all money deposited with the Trustee pursuant
to Section 4.01 shall be held in trust and applied by it, in accordance with the
provisions of the Securities, the coupons and this Indenture, to the payment,
either directly or through any Paying Agent (including the Company acting as its
own Paying Agent) as the Trustee may determine, to the Persons entitled thereto,
of the principal (and premium or Make-Whole Amount, if any), and interest, if
any, for whose payment such money has been deposited with or received by the
Trustee, but such money need not be segregated from other funds except to the
extent required by law.

                             ARTICLE FIVE - REMEDIES

     SECTION 5.01. EVENTS OF DEFAULT. "EVENT OF DEFAULT," wherever used herein
with respect to any particular series of Securities, means any one of the
following events (whatever the reason for such Event of Default and whether or
not it shall be voluntary or involuntary or be effected by operation of law or
pursuant to any judgment, decree or order of any court or any order, rule or
regulation of any administrative or governmental body):

          (1)       default in the payment of interest, if any, on any Security
     of that series when it becomes due and payable, and continuance of such
     default for a period of 30 days; or

          (2)       default in the payment of the principal of (or premium or
     Make-Whole Amount, if any, on) any Security of that series when it becomes
     due and payable at its Maturity; or

          (3)       default in the deposit of any sinking fund payment, to the
     extent applicable to such series of Securities, when and as due by the
     terms of any Security of that series; or

          (4)       default in the performance, or breach, of any covenant or
     warranty of the Company in this Indenture with respect to any Security of
     that series (other than a covenant or warranty a default in whose
     performance or whose breach is elsewhere in this Section specifically dealt
     with or which has expressly been included in this Indenture solely for the
     benefit of series of Securities other than that series), and continuance of
     such default or breach for a period of 60 days after there has been given,
     by registered or certified mail, to the Company by the Trustee or to the
     Company and the Trustee by the Holders of at least 25% in principal amount
     of the Outstanding Securities of that series a written notice specifying
     such default or breach and requiring it to be remedied and stating that
     such notice is a "NOTICE OF DEFAULT" hereunder; or

          (5)       a default under any bond, debenture, note, mortgage,
     indenture (including this Indenture) or other instrument (each, a "DEBT
     INSTRUMENT"), in each case under which there may be issued or by which
     there may be secured or evidenced any Recourse indebtedness for money
     borrowed of the Company, having an aggregate principal amount outstanding
     of at least $50,000,000 (each, a "COMPANY RECOURSE OBLIGATION"), whether
     such Recourse indebtedness now exists or shall hereafter be created, which
     default (A) shall constitute a failure to pay any portion of the principal
     of such Recourse

                                       37
<Page>

     indebtedness when due and payable at its stated maturity after the
     expiration of any applicable grace period with respect thereto or (B) shall
     have resulted in such Recourse indebtedness becoming or being declared due
     and payable prior to its stated maturity, without, in the case of Clause
     (A), such Recourse indebtedness having been discharged or without, in the
     case of Clause (B), such Recourse indebtedness having been discharged or
     such acceleration having been rescinded or annulled, in each such case
     within a period of 10 days after there shall have been given, by registered
     or certified mail, to the Company by the Trustee or to the Company and the
     Trustee by the Holders of at least 10% in principal amount of the
     Outstanding Securities of that series a written notice specifying such
     default and requiring the Company to cause such Recourse indebtedness to be
     discharged or cause such acceleration to be rescinded or annulled, as the
     case may be, and stating that such notice is a "Notice of Default"
     hereunder; provided, however, that, subject to the provisions of Sections
     6.01 and 6.02, the Trustee shall not be deemed to have knowledge of such
     default unless either (A) a Responsible Officer of the Trustee shall have
     knowledge of such default or (B) the Trustee shall have received written
     notice thereof from the Company, from any Holder, from the holder of any
     such Recourse indebtedness or from the trustee under any such mortgage,
     indenture or other instrument; or

          (6)       the entry by a court having jurisdiction in the premises of
     (A) a decree or order for relief in respect of the Company or any
     Significant Subsidiary in an involuntary case or proceeding under any
     applicable Federal or State bankruptcy, insolvency, reorganization or other
     similar law or (B) a decree or order adjudging the Company or any
     Significant Subsidiary a bankrupt or insolvent, or approving as properly
     filed a petition seeking reorganization, arrangement, adjustment or
     composition of or in respect of the Company or any Significant Subsidiary
     under any applicable Federal or State law, or appointing a custodian,
     receiver, liquidator, assignee, trustee, sequestrator or other similar
     official of the Company or any Significant Subsidiary or of any substantial
     part of its property, or ordering the winding up or liquidation of its
     affairs, and the continuance of any such decree or order for relief or any
     such other decree or order unstayed and in effect for a period of 90
     consecutive days; or

          (7)       the commencement by the Company or any Significant
     Subsidiary of a voluntary case or proceeding under any applicable Federal
     or State bankruptcy, insolvency, reorganization or other similar law or of
     any other case or proceeding to be adjudicated a bankrupt or insolvent, or
     the consent by the Company or any Significant Subsidiary to the entry of a
     decree or order for relief in respect of the Company or any Significant
     Subsidiary in an involuntary case or proceeding under any applicable
     Federal or State bankruptcy, insolvency, reorganization or other similar
     law or to the commencement of any bankruptcy or insolvency case or
     proceeding against the Company or any Significant Subsidiary, or the filing
     by the Company or any Significant Subsidiary of a petition or answer or
     consent seeking reorganization or relief under any applicable Federal or
     State law, or the consent by the Company or any Significant Subsidiary to
     the filing of such petition or to the appointment of or taking possession
     by a custodian, receiver, liquidator, assignee, trustee, sequestrator or
     other similar official of the Company or any Significant Subsidiary or of
     any substantial part of its property, or the making by the Company or any
     Significant Subsidiary of an assignment for the benefit of

                                       38
<Page>

     creditors, or the admission by the Company or any Significant Subsidiary in
     writing of its inability to pay its debts generally as they become due, or
     the taking of action by the Company or any Significant Subsidiary in
     furtherance of any such action; or

          (8)       any other Event of Default provided with respect to
     Securities of that series.

     As used in this Section 5.01, the term "BANKRUPTCY LAW" means title 11,
U.S. Code or any similar Federal or state law for the relief of debtors and the
term "CUSTODIAN" means any receiver, trustee, assignee, liquidator or other
similar official under any Bankruptcy Law and the term "SIGNIFICANT SUBSIDIARY"
means any subsidiary of the Company (whether or not a Subsidiary of the Company)
which is an obligor or guarantor of any Debt Instrument which is also a Company
Recourse Obligation having an aggregate principal amount outstanding of at least
$50,000,000.

     SECTION 5.02. ACCELERATION OF MATURITY; RESCISSION AND ANNULMENT. If an
Event of Default with respect to Securities of any series at the time
Outstanding occurs and is continuing, then and in every such case the Trustee or
the Holders of not less than 25% in principal amount of the Outstanding
Securities of that series may declare the principal amount (or, if Securities of
that Series are Original Issue Discount Securities or Indexed Securities, such
portion of the principal as may be specified in the terms thereof) of all the
Securities of that series to be due and payable immediately, by a notice in
writing to the Company (and to the Trustee if given by the Holders), and upon
any such declaration such principal or specified portion thereof shall become
immediately due and payable.

     At any time after such a declaration of acceleration with respect to
Securities of any series has been made and before a judgment or decree for
payment of the money due has been obtained by the Trustee as hereinafter in this
Article provided, the Holders of a majority in principal amount of the
Outstanding Securities of that series, by written notice to the Company and the
Trustee, may rescind and annul such declaration of acceleration and its
consequences if:

          (1)       the Company has paid or deposited with the Trustee a sum
     sufficient to pay in the currency, currency unit or composite currency in
     which the Securities of such series are payable (except as otherwise
     specified pursuant to Section 3.01 for the Securities of such series):

                              (A)  all overdue installments of interest on all
                    Outstanding Securities of that series and any related
                    coupons,

                              (B)  the principal of (and premium or Make-Whole
                    Amount, if any, on) any Outstanding Securities of that
                    series which have become due otherwise than by such
                    declaration of acceleration and interest, if any, thereon at
                    the rate or rates borne by or provided for in such
                    Securities,

                              (C)  to the extent that payment of such interest
                    is lawful, interest upon overdue installments of interest at
                    the rate or rates borne by or provided for in such
                    Securities, and

                                       39
<Page>

                              (D)  all sums paid or advanced by the Trustee
                    hereunder and the reasonable compensation, expenses,
                    disbursements and advances of the Trustee, its agents and
                    counsel; and

          (2)       all Events of Default with respect to Securities of that
     series, other than the nonpayment of the principal of (or premium or
     Make-Whole Amount, if any) or interest, if any, on Securities of that
     series which have become due solely by such declaration of acceleration,
     have been cured or waived as provided in Section 5.13.

No such rescission shall affect any subsequent default or impair any right
consequent thereon.

     SECTION 5.03. COLLECTION OF INDEBTEDNESS AND SUITS FOR ENFORCEMENT BY
TRUSTEE. The Company covenants that if:

          (1)       default is made in the payment of any installment of
     interest on any Security of any series and any related coupon when such
     interest becomes due and payable and such default continues for a period of
     30 days, or

          (2)       default is made in the payment of the principal of (or
     premium or Make-Whole Amount, if any, on) any Security of any series at its
     Maturity,

then the Company will, upon demand of the Trustee, pay to the Trustee, for the
benefit of the Holders of such Securities of such series and coupons, the whole
amount then due and payable on such Securities and coupons for principal (and
premium or Make-Whole Amount, if any) and interest, if any, with interest upon
any overdue principal (and premium or Make-Whole Amount, if any) and, to the
extent that payment of such interest, if any, shall be legally enforceable, upon
any overdue installments of interest at the rate or rates borne by or provided
for in such Securities, and, in addition thereto, such further amount as shall
be sufficient to cover the costs and expenses of collection, including the
reasonable compensation, expenses, disbursements and advances of the Trustee,
its agents and counsel.

     If the Company fails to pay such amounts forthwith upon such demand, the
Trustee, in its own name and as trustee of an express trust, may institute a
judicial proceeding for the collection of the sums so due and unpaid, and may
prosecute such proceeding to judgment or final decree, and may enforce the same
against the Company or any other obligor upon such Securities of such series and
collect the moneys adjudged or decreed to be payable in the manner provided by
law out of the property of the Company or any other obligor upon such Securities
of such series, wherever situated.

     If an Event of Default with respect to Securities of any series occurs and
is continuing, the Trustee may in its discretion proceed to protect and enforce
its rights and the rights of the Holders of Securities of such series and any
related coupons by such appropriate judicial proceedings as the Trustee shall
deem most effectual to protect and enforce any such rights, whether for the
specific enforcement of any covenant or agreement in this Indenture or in aid of
the exercise of any power granted herein, or to enforce any other proper remedy.

     SECTION 5.04. TRUSTEE MAY FILE PROOFS OF CLAIM. In case of the pendency of
any receivership, insolvency, liquidation, bankruptcy, reorganization,
arrangement, adjustment,

                                       40
<Page>

composition or other judicial proceeding relative to the Company or any other
obligor upon the Securities or the property of the Company or of such other
obligor or their creditors, the Trustee (irrespective of whether the principal
of the Securities of any series shall then be due and payable as therein
expressed or by declaration or otherwise and irrespective of whether the Trustee
shall have made any demand on the Company for the payment of overdue principal,
premium or Make-Whole Amount, if any, or interest, if any) shall be entitled and
empowered, by intervention in such proceeding or otherwise:

                    (i)       to file and prove a claim for the whole amount, or
     such lesser amount as may be provided for in the Securities of such series,
     of principal (and premium or Make-Whole Amount, if any) and interest, if
     any, owing and unpaid in respect of the Securities and to file such other
     papers or documents as may be necessary or advisable in order to have the
     claims of the Trustee (including any claim for the reasonable compensation,
     expenses, disbursements and advances of the Trustee, its agents and
     counsel) and of the Holders allowed in such judicial proceeding, and

                    (ii)      to collect and receive any moneys or other
     property payable or deliverable on any such claims and to distribute the
     same;

and any custodian, receiver, assignee, trustee, liquidator, sequestrator (or
other similar official) in any such judicial proceeding is hereby authorized by
each Holder of Securities of such series and coupons to make such payments to
the Trustee, and in the event that the Trustee shall consent to the making of
such payments directly to the Holders, to pay to the Trustee any amount due to
it for the reasonable compensation, expenses, disbursements and advances of the
Trustee and any predecessor Trustee, their agents and counsel, and any other
amounts due the Trustee or any predecessor Trustee under Section 6.06.

     Nothing herein contained shall be deemed to authorize the Trustee to
authorize or consent to or accept or adopt on behalf of any Holder of a Security
or coupon any plan of reorganization, arrangement, adjustment or composition
affecting the Securities or coupons or the rights of any Holder thereof, or to
authorize the Trustee to vote in respect of the claim of any Holder of a
Security or coupon in any such proceeding.

     In any proceedings brought by the Trustee (and also any proceedings
involving the interpretation of any provision of this Indenture to which the
Trustee shall be a party) the Trustee shall be held to represent all the Holders
of the Securities, and it shall not be necessary to make any Holders of the
Securities parties to any such proceedings.

     SECTION 5.05. TRUSTEE MAY ENFORCE CLAIMS WITHOUT POSSESSION OF SECURITIES
OR COUPONS. All rights of action and claims under this Indenture or any of the
Securities or coupons may be prosecuted and enforced by the Trustee without the
possession of any of the Securities or coupons or the production thereof in any
proceeding relating thereto, and any such proceeding instituted by the Trustee
shall be brought in its own name as trustee of an express trust, and any
recovery of judgment shall, after provision for the payment of the reasonable
compensation, expenses, disbursements and advances of the Trustee, its agents
and counsel, be for the ratable benefit of the Holders of the Securities and
coupons in respect of which such judgment has been recovered.

                                       41
<Page>

     SECTION 5.06. APPLICATION OF MONEY COLLECTED. Any money collected by the
Trustee pursuant to this Article shall be applied in the following order, at the
date or dates fixed by the Trustee and, in case of the distribution of such
money on account of principal (or premium or Make-Whole Amount, if any) or
interest, if any, upon presentation of the Securities or coupons, or both, as
the case may be, and the notation thereon of the payment if only partially paid
and upon surrender thereof if fully paid:

          FIRST: To the payment of all amounts due the Trustee and any
     predecessor Trustee under Section 6.06;

          SECOND: To the payment of the amounts then due and unpaid upon the
     Securities and coupons for principal (and premium or Make-Whole Amount, if
     any) and interest, if any, in respect of which or for the benefit of which
     such money has been collected, ratably, without preference or priority of
     any kind, according to the aggregate amounts due and payable on such
     Securities and coupons for principal (and premium or Make-Whole Amount, if
     any) and interest, if any, respectively; and

          THIRD: To the payment of the remainder, if any, to the Company.

     SECTION 5.07. LIMITATION ON SUITS. No Holder of any Security of any series
or any related coupon shall have any right to institute any proceeding, judicial
or otherwise, with respect to this Indenture, or for the appointment of a
receiver or trustee, or for any other remedy hereunder, unless:

          (1)       such Holder has previously given written notice to the
     Trustee of a continuing Event of Default with respect to the Securities of
     that series;

          (2)       the Holders of not less than 25% in principal amount of the
     Outstanding Securities of that series shall have made written request to
     the Trustee to institute proceedings in respect of such Event of Default in
     its own name as Trustee hereunder;

          (3)       such Holder or Holders have offered to the Trustee indemnity
     reasonably satisfactory to the Trustee against the costs, expenses and
     liabilities to be incurred in compliance with such request;

          (4)       the Trustee for 60 days after its receipt of such notice,
     request and offer of indemnity has failed to institute any such proceeding;
     and

          (5)       no direction inconsistent with such written request has been
     given to the Trustee during such 60-day period by the Holders of a majority
     in principal amount of the Outstanding Securities of that series;

it being understood and intended that no one or more of such Holders shall have
any right in any manner whatever by virtue of, or by availing of, any provision
of this Indenture to affect, disturb or prejudice the rights of any other of
such Holders, or to obtain or to seek to obtain priority or preference over any
other of such Holders or to enforce any right under this Indenture, except in
the manner herein provided and for the equal and ratable benefit of all such
Holders.

                                       42
<Page>

     SECTION 5.08. UNCONDITIONAL RIGHT OF HOLDERS TO RECEIVE PRINCIPAL, PREMIUM
OR MAKE-WHOLE AMOUNT, IF ANY, AND INTEREST, IF ANY. Notwithstanding any other
provision in this Indenture, the Holder of any Security or coupon shall have the
right which is absolute and unconditional to receive payment of the principal of
(and premium or Make-Whole Amount, if any) and (subject to Sections 3.05 and
3.07) interest, if any, on such Security or payment of such coupon on the
respective due dates expressed in such Security or coupon (or, in the case of
redemption, on the Redemption Date) and to institute suit for the enforcement of
any such payment, and such rights shall not be impaired without the consent of
such Holder.

     SECTION 5.09. RESTORATION OF RIGHTS AND REMEDIES. If the Trustee or any
Holder of a Security or coupon has instituted any proceeding to enforce any
right or remedy under this Indenture and such proceeding has been discontinued
or abandoned for any reason, or has been determined adversely to the Trustee or
to such Holder, then and in every such case, the Company, the Trustee and the
Holders of Securities and coupons shall, subject to any determination in such
proceeding, be restored severally and respectively to their former positions
hereunder and thereafter all rights and remedies of the Trustee and the Holders
shall continue as though no such proceeding had been instituted.

     SECTION 5.10. RIGHTS AND REMEDIES CUMULATIVE. Except as otherwise provided
with respect to the replacement or payment of mutilated, destroyed, lost or
stolen Securities or coupons in the last paragraph of Section 3.06, no right or
remedy herein conferred upon or reserved to the Trustee or to the Holders of
Securities or coupons is intended to be exclusive of any other right or remedy,
and every right and remedy shall, to the extent permitted by law, be cumulative
and in addition to every other right and remedy given hereunder or now or
hereafter existing at law or in equity or otherwise. The assertion or employment
of any right or remedy hereunder, or otherwise, shall not prevent the concurrent
assertion or employment of any other appropriate right or remedy.

     SECTION 5.11. DELAY OR OMISSION NOT WAIVER. No delay or omission of the
Trustee or of any Holder of any Security or coupon to exercise any right or
remedy accruing upon any Event of Default shall impair any such right or remedy
or constitute a waiver of any such Event of Default or an acquiescence therein.
Every right and remedy given by this Article or by law to the Trustee or to the
Holders may be exercised from time to time, and as often as may be deemed
expedient, by the Trustee or by the Holders of Securities or coupons, as the
case may be.

     SECTION 5.12. CONTROL BY HOLDERS OF SECURITIES. The Holders of not less
than a majority in principal amount of the Outstanding Securities of any series
shall have the right to direct the time, method and place of conducting any
proceeding for any remedy available to the Trustee or exercising any trust or
power conferred on the Trustee with respect to the Securities of such series,
PROVIDED THAT:

          (1)       such direction shall not be in conflict with any rule of law
     or with this Indenture,

          (2)       the Trustee may take any other action deemed proper by the
     Trustee which is not inconsistent with such direction, and

                                       43
<Page>

          (3)       the Trustee need not take any action which might involve it
     in personal liability or be unduly prejudicial to the Holders of Securities
     of such series not joining therein.

     Nothing in this Indenture shall impair the right of the Trustee in its
discretion to take any action deemed proper by the Trustee and which is not
inconsistent with such direction by Holders.

     SECTION 5.13. WAIVER OF PAST DEFAULTS. The Holders of not less than a
majority in principal amount of the Outstanding Securities of any series may on
behalf of the Holders of all the Securities of such series and any related
coupons waive any past default hereunder with respect to such series and its
consequences, except a default

          (1)       in the payment of the principal of (or premium or Make-Whole
     Amount, if any) or interest, if any, on any Security of such series or any
     related coupons, or

          (2)       in respect of a covenant or provision hereof which under
     Article Nine cannot be modified or amended without the consent of the
     Holder of each Outstanding Security of such series affected; or

          (3)       in respect of a covenant or provision hereof for the benefit
     or protection of the Trustee, without its express written consent.

     Upon any such waiver, such default shall cease to exist, and any Event of
Default arising therefrom shall be deemed to have been cured, for every purpose
of this Indenture; but no such waiver shall extend to any subsequent or other
default or Event of Default or impair any right consequent thereon.

     SECTION 5.14. WAIVER OF USURY, STAY OR EXTENSION LAWS. The Company
covenants (to the extent that it may lawfully do so) that it will not at any
time insist upon, or plead, or in any manner whatsoever claim or take the
benefit or advantage of, any usury, stay or extension law wherever enacted, now
or at any time hereafter in force, which may affect the covenants or the
performance of this Indenture; and the Company (to the extent that it may
lawfully do so) hereby expressly waives all benefit or advantage of any such
law, and covenants that it will not hinder, delay or impede the execution of any
power herein granted to the Trustee, but will suffer and permit the execution of
every such power as though no such law had been enacted.

     SECTION 5.15. UNDERTAKING FOR COSTS. All parties to this Indenture agree,
and each Holder of any Security by his acceptance thereof shall be deemed to
have agreed, that any court may in its discretion require, in any suit for the
enforcement of any right or remedy under this Indenture, or in any suit against
the Trustee for any action taken or omitted by it as Trustee, the filing by any
party litigant in such suit of an undertaking to pay the costs of such suit, and
that such court may in its discretion assess reasonable costs, including
reasonable attorneys' fees and expenses, against any party litigant in such suit
having due regard to the merits and good faith of the claims or defenses made by
such party litigant; but the provisions of this Section shall not apply to any
suit instituted by the Trustee, to any suit instituted by any Holder, or group
of Holders, holding in the aggregate more than 10% in principal amount of the
Outstanding Securities of any series, or to any suit instituted by any Holder
for the enforcement of the

                                       44
<Page>

payment of the principal of (or premium or Make-Whole Amount, if any) or
interest, if any, on any Security on or after the respective Stated Maturities
expressed in such Security (or, in the case of redemption, on or after the
Redemption Date).

                            ARTICLE SIX - THE TRUSTEE

     SECTION 6.01. NOTICE OF DEFAULTS. Within 90 days after the occurrence of
any default hereunder with respect to the Securities of any series, the Trustee
shall transmit in the manner and to the extent provided in TIA Section 313(c),
notice of such default hereunder known to the Trustee, unless such default shall
have been cured or waived; PROVIDED, HOWEVER, that, except in the case of a
default in the payment of the principal of (or premium or Make-Whole Amount, if
any) or interest, if any, on any Security of such series, or in the payment of
any sinking or purchase fund installment with respect to the Securities of such
series, the Trustee shall be protected in withholding such notice if and so long
as a trust committee of directors and/or Responsible Officers of the Trustee in
good faith determine that the withholding of such notice is in the interests of
the Holders of the Securities and coupons of such series; and PROVIDED FURTHER
that in the case of any default or breach of the character specified in Section
5.01(4) with respect to the Securities and coupons of such series, no such
notice to Holders shall be given until at least 60 days after the occurrence
thereof. For the purpose of this Section, the term "DEFAULT" means any event
which is, or after notice or lapse of time or both would become, an Event of
Default with respect to the Securities of such series.

     SECTION 6.02. CERTAIN RIGHTS OF TRUSTEE. Subject to the provisions of TIA
Section 315(a) through 315(d):

          (1)       the Trustee may conclusively rely and shall be fully
     protected in acting or refraining from acting upon any resolution,
     certificate, statement, instrument, opinion, report, notice, request,
     direction, consent, order, bond, debenture, note, coupon or other paper or
     document (whether in its original or facsimile form) reasonably believed by
     it to be genuine and to have been signed or presented by the proper party
     or parties;

          (2)       any request or direction of the Company mentioned herein
     shall be sufficiently evidenced by a Company Request or Company Order
     (other than delivery of any Security, together with any coupons
     appertaining thereto, to the Trustee for authentication and delivery
     pursuant to Section 3.03 which shall be sufficiently evidenced as provided
     therein) and any resolution of the Board of Directors may be sufficiently
     evidenced by a Board Resolution;

          (3)       whenever in the administration of this Indenture the Trustee
     shall deem it desirable that a matter be proved or established prior to
     taking, suffering or omitting any action hereunder, the Trustee (unless
     other evidence be herein specifically prescribed) may, in the absence of
     bad faith on its part, rely upon an Officers' Certificate;

          (4)       the Trustee may consult with counsel of its own selection
     and the advice of such counsel or any Opinion of Counsel shall be full and
     complete authorization and protection in respect of any action taken,
     suffered or omitted by it hereunder in good faith and in reliance thereon;

                                       45
<Page>

          (5)       the Trustee shall be under no obligation to exercise any of
     the rights or powers vested in it by this Indenture at the request or
     direction of any of the Holders of Securities of any series or any related
     coupons pursuant to this Indenture, unless such Holders shall have offered
     to the Trustee security or indemnity reasonably satisfactory to the Trustee
     against the costs, expenses and liabilities which might be incurred by it
     in compliance with such request or direction;

          (6)       the Trustee shall not be bound to make any investigation
     into the facts or matters stated in any resolution, certificate, statement,
     instrument, opinion, report, notice, request, direction, consent, order,
     bond, debenture, note, coupon or other paper or document, unless requested
     in writing so to do by the Holders of not less than a majority in aggregate
     principal amount of the Outstanding Securities of any series; PROVIDED
     THAT, if the payment within a reasonable time to the Trustee of the costs,
     expenses or liabilities likely to be incurred by it in the making of such
     investigation is, in the opinion of the Trustee, not reasonably assured to
     the Trustee by the security afforded to it by the terms of this Indenture,
     the Trustee may require reasonable indemnity against such expenses or
     liabilities as a condition to proceeding; the reasonable expenses of every
     such examination shall be paid by the Holders. The Trustee, in its
     discretion, may make such further inquiry or investigation into such facts
     or matters as it may see fit, and, if the Trustee shall determine to make
     such further inquiry or investigation, it shall be entitled to examine the
     books, records and premises of the Company relevant to the facts or matters
     that are the subject of its inquiry, personally or by agent or attorney at
     the expense of the Company and shall incur no liability of any kind by
     reason of such inquiry or investigation;

          (7)       the Trustee may execute any of the trusts or powers
     hereunder or perform any duties hereunder either directly or by or through
     agents or attorneys and the Trustee shall not be responsible for any
     misconduct or negligence on the part of any agent or attorney appointed
     with due care by it hereunder;

          (8)       the Trustee shall not be liable for any action taken,
     suffered or omitted by it in good faith and reasonably believed by it to be
     authorized or within the discretion or rights or powers conferred upon it
     by this Indenture;

          (9)       any permissive right or power available to the Trustee under
     this Indenture or any supplement hereto shall not be construed to be a
     mandatory duty or obligation;

          (10)      the Trustee shall not be charged with knowledge of any
     matter (including any default, other than as described in Section 5.01(1),
     (2) or (3)) unless and except to the extent actually known to a Responsible
     Officer of the Trustee or to the extent written notice thereof is received
     by the Trustee at the Corporate Trust Office;

          (11)      the Trustee shall have no liability for any inaccuracy in
     the books and records of, or for any actions or omissions of, DTC,
     Euroclear or Clearstream or any depository acting on behalf of any of them;
     and

                                       46
<Page>

          (12)      the rights, privileges, protections, immunities and benefits
     given to the Trustee, including, without limitation, its right to be
     indemnified, are extended to, and shall be enforceable by, the Trustee in
     each of its capacities hereunder, and each agent, custodian and other
     Person employed by the Trustee to act hereunder.

     SECTION 6.03. NOT RESPONSIBLE FOR RECITALS OR ISSUANCE OF SECURITIES. The
recitals contained herein and in the Securities, except the Trustee's
certificate of authentication, and in any coupons shall be taken as the
statements of the Company, and neither the Trustee nor any Authenticating Agent
assumes any responsibility for their correctness. The Trustee makes no
representations as to the validity or sufficiency of this Indenture or of the
Securities or coupons, except that the Trustee represents that it is duly
authorized to execute and deliver this Indenture, authenticate the Securities
and perform its obligations hereunder. Neither the Trustee nor any
Authenticating Agent shall be accountable for the use or application by the
Company of Securities or the proceeds thereof.

     SECTION 6.04. MAY HOLD SECURITIES. The Trustee, any Paying Agent, Security
Registrar, Authenticating Agent or any other agent of the Company, in its
individual or any other capacity, may become the owner or pledgee of Securities
and coupons and, subject to TIA Sections 310(b) and 311, may otherwise deal with
the Company with the same rights it would have if it were not Trustee, Paying
Agent, Security Registrar, Authenticating Agent or such other agent.

     SECTION 6.05. MONEY HELD IN TRUST. Money held by the Trustee in trust
hereunder need not be segregated from other funds except to the extent required
by law. The Trustee shall be under no liability for interest on any money
received by it hereunder except as otherwise agreed with the Company.

     SECTION 6.06. COMPENSATION AND REIMBURSEMENT. The Company agrees:

          (1)       to pay to the Trustee from time to time reasonable
     compensation for all services rendered by it hereunder (which compensation
     shall not be limited by any provision of law in regard to the compensation
     of a trustee of an express trust);

          (2)       except as otherwise expressly provided herein, to reimburse
     each of the Trustee and any predecessor Trustee upon its request for all
     reasonable expenses and disbursements incurred by the Trustee in accordance
     with any provision of this Indenture (including the reasonable compensation
     and the reasonable expenses and disbursements of its agents and counsel),
     except any such expense or disbursement as shall be determined to have been
     caused by its own negligence, willful misconduct or bad faith; and

          (3)       to indemnify each of the Trustee and any predecessor Trustee
     for, and to hold it harmless against, any loss, liability, claim, damage or
     expense incurred without negligence, willful misconduct or bad faith on its
     part, arising out of or in connection with the acceptance or administration
     of the trust or trusts hereunder, including the costs and expenses of
     defending itself against any claim or liability in connection with the
     exercise or performance of any of its powers or duties hereunder.

                                       47
<Page>

     When the Trustee incurs expenses or renders services in connection with an
Event of Default specified in Section 5.01(6) or Section 5.01(7), the expenses
(including the reasonable charges and expenses of its counsel) and the
compensation for the services are intended to constitute expenses of
administration under any applicable Bankruptcy Law.

     As security for the performance of the obligations of the Company under
this Section, the Trustee shall have a lien prior to the Securities upon all
property and funds held or collected by the Trustee as such, except funds held
in trust for the payment of principal of (or premium or Make-Whole Amount, if
any) or interest, if any, on particular Securities or any coupons.

     The provisions of this Section shall survive the termination of this
Indenture and resignation or removal of the Trustee.

     SECTION 6.07. CORPORATE TRUSTEE REQUIRED; ELIGIBILITY; CONFLICTING
INTERESTS. There shall at all times be a Trustee hereunder which shall be
eligible to act as Trustee under TIA Section 310(a)(1) and shall have at all
times a combined capital and surplus of at least $50,000,000. If the Trustee
publishes reports of condition at least annually, pursuant to law or the
requirements of Federal, state, territorial or District of Columbia supervising
or examining authority, then for the purposes of this Section, the combined
capital and surplus of the Trustee shall be deemed to be its combined capital
and surplus as set forth in its most recent report of condition so published. If
at any time the Trustee shall cease to be eligible in accordance with the
provisions of this Section, it shall resign immediately in the manner and with
the effect hereinafter specified in this Article. Neither the Company nor any
Person directly or indirectly controlling, controlled by, or under common
control with the Company shall serve as Trustee.

     SECTION 6.08. RESIGNATION AND REMOVAL; APPOINTMENT OF SUCCESSOR.

          (a)  No resignation or removal of the Trustee and no appointment of a
successor Trustee pursuant to this Article shall become effective until the
acceptance of appointment by the successor Trustee in accordance with the
applicable requirements of Section 6.09.

          (b)  The Trustee may resign at any time with respect to the Securities
of one or more series by giving written notice thereof to the Company. If an
instrument of acceptance by a successor Trustee shall not have been delivered to
the Trustee within 60 days after the giving of such notice of resignation, the
resigning Trustee may petition, at the expense of the Company, any court of
competent jurisdiction for the appointment of a successor Trustee.

          (c)  The Trustee may be removed at any time with respect to the
Securities of any series by Act of the Holders of a majority in principal amount
of the Outstanding Securities of such series delivered to the Trustee and to the
Company. If an instrument of acceptance by a successor Trustee shall not have
been delivered to the Trustee within 60 days after the giving of such notice of
resignation, the resigning Trustee may petition, at the expense of the Company,
any court of competent jurisdiction for the appointment of a successor Trustee.

          (d)  If at any time:

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<Page>

               (1)       the Trustee shall fail to comply with the provisions of
     TIA Section 310(b) after written request therefor by the Company or by any
     Holder of a Security who has been a bona fide Holder of a Security for at
     least 6 months, or

               (2)       the Trustee shall cease to be eligible under Section
     6.07 and shall fail to resign after written request therefor by the Company
     or by any Holder of a Security who has been a bona fide Holder of a
     Security for at least 6 months, or

               (3)       the Trustee shall become incapable of acting or shall
     be adjudged a bankrupt or insolvent or a receiver of the Trustee or of its
     property shall be appointed or any public officer shall take charge or
     control of the Trustee or of its property or affairs for the purpose of
     rehabilitation, conservation or liquidation,

then, in any such case, (i) the Company by or pursuant to a Board Resolution may
remove the Trustee and appoint a successor Trustee with respect to all
Securities, or (ii) subject to TIA Section 315(e), any Holder of a Security who
has been a bona fide Holder of a Security for at least 6 months may, on behalf
of himself and all others similarly situated, petition any court of competent
jurisdiction for the removal of the Trustee with respect to all Securities and
the appointment of a successor Trustee or Trustees.

          (e)  If the Trustee shall resign, be removed or become incapable of
acting, or if a vacancy shall occur in the office of Trustee for any cause with
respect to the Securities of one or more series, the Company, by or pursuant to
a Board Resolution, shall promptly appoint a successor Trustee or Trustees with
respect to the Securities of that or those series (it being understood that any
such successor Trustee may be appointed with respect to the Securities of one or
more or all of such series and that at any time there shall be only one Trustee
with respect to the Securities of any particular series). If, within one year
after such resignation, removal or incapability, or the occurrence of such
vacancy, a successor Trustee with respect to the Securities of any series shall
be appointed by Act of the Holders of a majority in principal amount of the
Outstanding Securities of such series delivered to the Company and the retiring
Trustee, the successor Trustee so appointed shall, forthwith upon its acceptance
of such appointment, become the successor Trustee with respect to the Securities
of such series and to that extent supersede the successor Trustee appointed by
the Company. If no successor Trustee with respect to the Securities of any
series shall have been so appointed by the Company or the Holders of Securities
and accepted appointment in the manner hereinafter provided, any Holder of a
Security who has been a bona fide Holder of a Security of such series for at
least 6 months may, on behalf of himself and all others similarly situated,
petition any court of competent jurisdiction for the appointment of a successor
Trustee with respect to Securities of such series.

          (f)  The Company shall give notice of each resignation and each
removal of the Trustee with respect to the Securities of any series and each
appointment of a successor Trustee with respect to the Securities of any series
in the manner provided for notices to the Holders of Securities in Section 1.06.
Each notice shall include the name of the successor Trustee with respect to the
Securities of such series and the address of its Corporate Trust Office.

                                       49
<Page>

     SECTION 6.09. ACCEPTANCE OF APPOINTMENT BY SUCCESSOR.

          (a)  In case of the appointment hereunder of a successor Trustee with
respect to all Securities, every such successor Trustee so appointed shall
execute, acknowledge and deliver to the Company and to the retiring Trustee an
instrument accepting such appointment, and thereupon the resignation or removal
of the retiring Trustee shall become effective and such successor Trustee,
without any further act, deed or conveyance, shall become vested with all the
rights, powers, trusts and duties of the retiring Trustee; but, on request of
the Company or the successor Trustee, such retiring Trustee shall, upon payment
of its charges, execute and deliver an instrument transferring to such successor
Trustee all the rights, powers and trusts of the retiring Trustee, and shall
duly assign, transfer and deliver to such successor Trustee all property and
money held by such retiring Trustee hereunder, subject nevertheless to its
claim, if any, provided for in Section 6.06.

          (b)  In case of the appointment hereunder of a successor Trustee with
respect to the Securities of one or more (but not all) series, the Company, the
retiring Trustee and each successor Trustee with respect to the Securities of
one or more series shall execute and deliver an indenture supplemental hereto,
pursuant to Article Nine hereof, wherein each successor Trustee shall accept
such appointment and which (1) shall contain such provisions as shall be
necessary or desirable to transfer and confirm to, and to vest in, each
successor Trustee all the rights, powers, trusts and duties of the retiring
Trustee with respect to the Securities of that or those series to which the
appointment of such successor Trustee relates, (2) if the retiring Trustee is
not retiring with respect to all Securities, shall contain such provisions as
shall be deemed necessary or desirable to confirm that all the rights, powers,
trusts and duties of the retiring Trustee with respect to the Securities of that
or those series as to which the retiring Trustee is not retiring shall continue
to be vested in the retiring Trustee, and (3) shall add to or change any of the
provisions of this Indenture as shall be necessary to provide for or facilitate
the administration of the trusts hereunder by more than one Trustee, it being
understood that nothing herein or in such supplemental indenture shall
constitute such Trustees co-trustees of the same trust and that each such
Trustee shall be trustee of a trust or trusts hereunder separate and apart from
any trust or trusts hereunder administered by any other such Trustee; and upon
the execution and delivery of such supplemental indenture the resignation or
removal of the retiring Trustee shall become effective to the extent provided
therein and each such successor Trustee, without any further act, deed or
conveyance, shall become vested with all the rights, powers, trusts and duties
of the retiring Trustee with respect to the Securities of that or those series
to which the appointment of such successor Trustee relates; but, on request of
the Company or any successor Trustee, such retiring Trustee shall duly assign,
transfer and deliver to such successor Trustee all property and money held by
such retiring Trustee hereunder with respect to the Securities of that or those
series to which the appointment of such successor Trustee relates.

          (c)  Upon request of any such successor Trustee, the Company shall
execute any and all instruments for more fully and certainly vesting in and
confirming to such successor Trustee all such rights, powers and trusts referred
to in paragraph (a) or (b) of this Section 6.09, as the case may be.

          (d)  No successor Trustee shall accept its appointment unless at the
time of such acceptance such successor Trustee shall be qualified and eligible
under this Article.

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<Page>

     SECTION 6.10. MERGER, CONVERSION, CONSOLIDATION OR SUCCESSION TO BUSINESS.
Any corporation into which the Trustee may be merged or converted or with which
it may be consolidated, or any corporation resulting from any merger, conversion
or consolidation to which the Trustee shall be a party, or any corporation
succeeding to all or substantially all of the corporate trust business of the
Trustee, shall be the successor of the Trustee hereunder, provided such
corporation shall be otherwise qualified and eligible under this Article,
without the execution or filing of any paper or any further act on the part of
any of the parties hereto. In case any Securities or coupons shall have been
authenticated, but not delivered, by the Trustee then in office, any successor
by merger, conversion or consolidation to such authenticating Trustee may adopt
such authentication and deliver the Securities or coupons so authenticated with
the same effect as if such successor Trustee had itself authenticated such
Securities or coupons. In case any Securities or coupons shall not have been
authenticated by such predecessor Trustee, any such successor Trustee may
authenticate and deliver such Securities or coupons, in either its own name or
that of its predecessor Trustee, with the full force and effect which this
Indenture provides for the certificate of authentication of the Trustee.

     SECTION 6.11. APPOINTMENT OF AUTHENTICATING AGENT. At any time when any of
the Securities remain Outstanding, the Trustee may appoint an Authenticating
Agent or Agents with respect to one or more series of Securities which shall be
authorized to act on behalf of the Trustee to authenticate Securities of such
series issued upon exchange, registration of transfer or partial redemption or
repayment thereof, and Securities so authenticated shall be entitled to the
benefits of this Indenture and shall be valid and obligatory for all purposes as
if authenticated by the Trustee hereunder. Any such appointment shall be
evidenced by an instrument in writing signed by a Responsible Officer of the
Trustee, a copy of which instrument shall be promptly furnished to the Company.
Wherever reference is made in this Indenture to the authentication and delivery
of Securities by the Trustee or the Trustee's certificate of authentication,
such reference shall be deemed to include authentication and delivery on behalf
of the Trustee by an Authenticating Agent and a certificate of authentication
executed on behalf of the Trustee by an Authenticating Agent. Each
Authenticating Agent shall be acceptable to the Company and shall at all times
be a bank or trust company or corporation organized and doing business and in
good standing under the laws of the United States of America or of any state or
the District of Columbia, authorized under such laws to act as Authenticating
Agent, having a combined capital and surplus of not less than $50,000,000 and
subject to supervision or examination by Federal or state authorities. If such
Authenticating Agent publishes reports of condition at least annually, pursuant
to law or the requirements of the aforesaid supervising or examining authority,
then for the purposes of this Section, the combined capital and surplus of such
Authenticating Agent shall be deemed to be its combined capital and surplus as
set forth in its most recent report of condition so published. In case at any
time an Authenticating Agent shall cease to be eligible in accordance with the
provisions of this Section, such Authenticating Agent shall resign immediately
in the manner and with the effect specified in this Section.

     Any corporation into which an Authenticating Agent may be merged or
converted or with which it may be consolidated, or any corporation resulting
from any merger, conversion or consolidation to which such Authenticating Agent
shall be a party, or any corporation succeeding to the corporate agency or
corporate trust business of an Authenticating Agent, shall continue to be an
Authenticating Agent, provided such corporation shall be otherwise eligible
under this

                                       51
<Page>

Section, without the execution or filing of any paper or further act on the part
of the Trustee or the Authenticating Agent.

     An Authenticating Agent for any series of Securities may at any time resign
by giving written notice of resignation to the Trustee for such series and to
the Company. The Trustee for any series of Securities may at any time terminate
the agency of an Authenticating Agent by giving written notice of termination to
such Authenticating Agent and to the Company. Upon receiving such a notice of
resignation or upon such a termination, or in case at any time such
Authenticating Agent shall cease to be eligible in accordance with the
provisions of this Section, the Trustee for such series may appoint a successor
Authenticating Agent which shall be acceptable to the Company and shall give
notice of such appointment to all Holders of Securities of the series with
respect to which such Authenticating Agent will serve in the manner set forth in
Section 1.06. Any successor Authenticating Agent upon acceptance of its
appointment hereunder shall become vested with all the rights, powers and duties
of its predecessor hereunder, with like effect as if originally named as an
Authenticating Agent herein. No successor Authenticating Agent shall be
appointed unless eligible under the provisions of this Section.

     The Company agrees to pay to each Authenticating Agent from time to time
reasonable compensation including reimbursement of its reasonable expenses for
its services under this Section, subject to Section 6.06.

     If an appointment with respect to one or more series is made pursuant to
this Section, the Securities of such series may have endorsed thereon, in
addition to or in lieu of the Trustee's certificate of authentication, an
alternate certificate of authentication substantially in the following form:

     "This is one of the Securities of the series designated therein referred to
in the within- mentioned Indenture.

                                        [_________________________________]
                                        as Trustee


Dated:                                  By:
      --------------------------------      ------------------------------------
      --------------------------------        as Authenticating Agent


Dated:                                  By:
      --------------------------------      ------------------------------------
      --------------------------------        Authorized Officer"

     SECTION 6.12. CERTAIN DUTIES AND RESPONSIBILITIES OF THE TRUSTEE.

          (a)  With respect to the Securities of any series, except during the
continuance of an Event of Default with respect to the Securities of such
series:

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<Page>

               (1)       the Trustee undertakes to perform such duties and only
     such duties as are specifically set forth in this Indenture, and no implied
     covenants or obligations shall be read into this Indenture against the
     Trustee; and

               (2)       in the absence of bad faith on its part, the Trustee
     may conclusively rely, as to the truth of the statements and the
     correctness of the opinions expressed therein, upon certificates or
     opinions furnished to the Trustee and conforming to the requirements of
     this Indenture; but in the case of any such certificates or opinions which
     by any provision hereof are specifically required to be furnished to the
     Trustee, the Trustee shall be under a duty to examine the same to determine
     whether or not they conform to the requirements of this Indenture, but
     shall not be under any duty to verify the contents or accuracy thereof.

          (b)  In case an Event of Default with respect to the Securities of any
series has occurred and is continuing, the Trustee shall, with respect to
Securities of such series, exercise such of the rights and powers vested in it
by this Indenture, and use the same degree of care and skill in their exercise,
as a prudent man would exercise or use under the circumstances in the conduct of
his own affairs.

          (c)  No provision of this Indenture shall be construed to relieve the
Trustee from liability for its own negligent action, its own negligent failure
to act, or its own willful misconduct, except that:

               (1)       this Subsection shall not be construed to limit the
     effect of Subsection (a) of this Section;

               (2)       the Trustee shall not be liable for any error of
     judgment made in good faith by a Responsible Officer, unless it shall be
     proved that the Trustee was negligent in ascertaining the pertinent facts;

               (3)       the Trustee shall not be liable with respect to any
     action taken or omitted to be taken by it in good faith in accordance with
     the direction of the Holders of a majority in principal amount of the
     Outstanding Securities of any series relating to the time, method and place
     of conducting any proceeding for any remedy available to the Trustee, or
     exercising any trust or power conferred upon the Trustee, under this
     Indenture with respect to the Securities of such series; and

               (4)       no provision of this Indenture shall require the
     Trustee to expend or risk its own funds or otherwise incur any financial
     liability in the performance of any of its duties hereunder, or in the
     exercise of any of its rights or powers. The Trustee shall be under no
     obligation to exercise any of its rights and powers under this Indenture at
     the request of any Holder, unless such Holder shall have offered to the
     Trustee security and indemnity satisfactory to it against any loss,
     liability or expense.

          (d)  Whether or not therein expressly so provided, every provision of
this Indenture relating to the conduct or affecting the liability of or
affording protection to the Trustee shall be subject to the provisions of this
Section 6.12.

                                       53
<Page>

          (e)  The Trustee shall not be liable for interest on any money or
assets held by it except to the extent the Trustee may agree in writing with the
Company. Assets held in trust by the Trustee need not be segregated from other
assets except to the extent required by law.

        ARTICLE SEVEN - HOLDERS' LISTS AND REPORTS BY TRUSTEE AND COMPANY

     SECTION 7.01. DISCLOSURE OF NAMES AND ADDRESSES OF HOLDERS. Every Holder of
Securities or coupons, by receiving and holding the same, agrees with the
Company and the Trustee that neither the Company nor the Trustee nor any
Authenticating Agent nor any Paying Agent nor any Security Registrar shall be
held accountable by reason of the disclosure of any information as to the names
and addresses of the Holders of Securities in accordance with TIA Section 312,
regardless of the source from which such information was derived, and that the
Trustee shall not be held accountable by reason of mailing any material pursuant
to a request made under TIA Section 312(b).

     SECTION 7.02. REPORTS BY TRUSTEE. The Trustee shall transmit to Holders
such reports concerning the Trustee and its actions under this Indenture as may
be required by TIA Section 313 at the times and in the manner provided by the
TIA, which shall initially be not less than every twelve months commencing on
________________. A copy of each such report shall, at the time of such
transmission to Holders, be filed by the Trustee with each stock exchange, if
any, upon which any Securities are listed, with the Commission and with the
Company. The Company will notify the Trustee when any Securities are listed on
any stock exchange.

     SECTION 7.03. REPORTS BY COMPANY. The Company will:

          (1)       file with the Trustee, within 15 days after the Company is
     required to file the same with the Commission, copies of the annual reports
     and of the information, documents and other reports (or copies of such
     portions of any of the foregoing as the Commission may from time to time by
     rules and regulations prescribe) which the Company may be required to file
     with the Commission pursuant to Section 13 or Section 15(d) of the Exchange
     Act or, if the Company is not required to file information, documents or
     reports pursuant to either of such Sections, then it will file with the
     Trustee and the Commission, in accordance with rules and regulations
     prescribed from time to time by the Commission, such of the supplementary
     and periodic information, documents and reports which may be required
     pursuant to Section 13 of the Exchange Act in respect of a security listed
     and registered on a national securities exchange as may be prescribed from
     time to time in such rules and regulations;

          (2)       file with the Trustee and the Commission, in accordance with
     rules and regulations prescribed from time to time by the Commission, such
     additional information, documents and reports with respect to compliance by
     the Company with the conditions and covenants of this Indenture as may be
     required from time to time by such rules and regulations;

          (3)       transmit by mail to the Holders of Securities, within 30
     days after the filing thereof with the Trustee, in the manner and to the
     extent provided in TIA Section 313(c), such summaries of any information,
     documents and reports required to be filed by

                                       54
<Page>

     the Company pursuant to paragraphs (1) and (2) of this Section as may be
     required by rules and regulations prescribed from time to time by the
     Commission; and

          (4)       delivery of such reports, information and documents to the
     Trustee is for informational purposes only and the Trustee's receipt of
     such shall not constitute constructive notice of any information contained
     therein or determinable from information contained therein, including the
     Company's compliance with any of its covenants hereunder (as to which the
     Trustee is entitled to rely exclusively on Officers' Certificates).

     SECTION 7.04. COMPANY TO FURNISH TRUSTEE NAMES AND ADDRESSES OF HOLDERS.
The Company will furnish or cause to be furnished to the Trustee:

          (a)       semiannually, not later than 15 days after the Regular
Record Date for interest for each series of Securities, a list, in such form as
the Trustee may reasonably require, of the names and addresses of the Holders of
Registered Securities of such series as of such Regular Record Date, or if there
is no Regular Record Date for interest for such series of Securities,
semiannually, upon such dates as are set forth in the Board Resolution or
indenture supplemental hereto authorizing such series, and

          (b)       at such other times as the Trustee may request in writing,
within 30 days after the receipt by the Company of any such request, a list of
similar form and content as of a date not more than 15 days prior to the time
such list is furnished,

PROVIDED, HOWEVER, that, so long as the Trustee is the Security Registrar, no
such list shall be required to be furnished.

        ARTICLE EIGHT - CONSOLIDATION, MERGER, SALE, LEASE OR CONVEYANCE

     SECTION 8.01. CONSOLIDATIONS AND MERGERS OF COMPANY AND SALES, LEASES AND
CONVEYANCES PERMITTED SUBJECT TO CERTAIN CONDITIONS. The Company may consolidate
with, or sell, lease or convey all or substantially all of its assets to, or
merge with or into any other corporation, PROVIDED THAT in any such case, (1)
either the Company shall be the continuing corporation, or the successor
corporation shall be a corporation organized and existing under the laws of the
United States, any State thereof or the District of Columbia and such successor
corporation shall expressly assume the due and punctual payment of the principal
of (and premium or Make-Whole Amount, if any) and interest, if any, on all of
the Securities, according to their tenor, and the due and punctual performance
and observance of all of the covenants and conditions of this Indenture to be
performed by the Company by supplemental indenture, complying with Article Nine
hereof, satisfactory to the Trustee, executed and delivered to the Trustee by
such corporation and (2) immediately after giving effect to such transaction and
treating any indebtedness which becomes an obligation of the Company or any
Subsidiary as a result thereof as having been incurred by the Company or such
Subsidiary at the time of such transaction, no Event of Default, and no event
which, after notice or the lapse of time, or both, would become an Event of
Default, shall have occurred and be continuing.

     SECTION 8.02. RIGHTS AND DUTIES OF SUCCESSOR CORPORATION. In case of any
such consolidation, merger, sale, lease or conveyance and upon any such
assumption by the successor

                                       55
<Page>

corporation, such successor corporation shall succeed to and be substituted for
the Company, with the same effect as if it had been named herein as the party of
the first part, and the predecessor corporation, except in the event of a lease,
shall be relieved of any further obligation under this Indenture and the
Securities. Such successor corporation thereupon may cause to be signed, and may
issue either in its own name or in the name of the Company, any or all of the
Securities issuable hereunder which theretofore shall not have been signed by
the Company and delivered to the Trustee; and, upon the order of such successor
corporation, instead of the Company, and subject to all the terms, conditions
and limitations in this Indenture prescribed, the Trustee shall authenticate and
shall deliver any Securities which previously shall have been signed and
delivered by the officers of the Company to the Trustee for authentication, and
any Securities which such successor corporation thereafter shall cause to be
signed and delivered to the Trustee for that purpose. All the Securities so
issued shall in all respects have the same legal rank and benefit under this
Indenture as the Securities theretofore or thereafter issued in accordance with
the terms of this Indenture as though all of such Securities had been issued at
the date of the execution hereof.

     In case of any such consolidation, merger, sale, lease or conveyance, such
changes in phraseology and form (but not in substance) may be made in the
Securities thereafter to be issued as may be appropriate.

     SECTION 8.03. OFFICERS' CERTIFICATE AND OPINION OF COUNSEL. Any
consolidation, merger, sale, lease or conveyance permitted under Section 8.01 is
also subject to the condition that the Trustee receive an Officers' Certificate
and an Opinion of Counsel to the effect that any such consolidation, merger,
sale, lease or conveyance, and the assumption by any successor corporation,
complies with the provisions of this Article and that all conditions precedent
herein provided for relating to such transaction have been complied with.

                     ARTICLE NINE - SUPPLEMENTAL INDENTURES

     SECTION 9.01. SUPPLEMENTAL INDENTURES WITHOUT CONSENT OF HOLDERS. Without
the consent of any Holders of Securities or coupons, the Company, when
authorized by or pursuant to a Board Resolution, and the Trustee, at any time
and from time to time, may enter into one or more indentures supplemental
hereto, in form satisfactory to the Trustee, for any of the following purposes:

          (1)       to evidence the succession of another Person to the Company
     and the assumption by any such successor of the covenants of the Company
     contained herein and in the Securities; or

          (2)       to add to the covenants of the Company for the benefit of
     the Holders of all or any series of Securities (and if such covenants are
     to be for the benefit of less than all series of Securities, stating that
     such covenants are expressly being included solely for the benefit of such
     series) or to surrender any right or power herein conferred upon the
     Company; or

          (3)       to add any additional Events of Default for the benefit of
     the Holders of all or any series of Securities (and if such Events of
     Default are to be for the benefit of less

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     than all series of Securities, stating that such Events of Default are
     expressly being included solely for the benefit of such series); PROVIDED,
     HOWEVER, that in respect of any such additional Events of Default such
     supplemental indenture may provide for a particular period of grace after
     default (which period may be shorter or longer than that allowed in the
     case of other defaults) or may provide for an immediate enforcement upon
     such default or may limit the remedies available to the Trustee upon such
     default or may limit the right of the Holders of a majority in aggregate
     principal amount of that or those series of Securities to which such
     additional Events of Default apply to waive such default; or

          (4)       to add to or change any of the provisions of this Indenture
     to provide that Bearer Securities may be registrable as to principal, to
     change or eliminate any restrictions on the payment of principal of or
     premium or Make-Whole Amount, if any, or interest, if any, on Bearer
     Securities, to permit Bearer Securities to be issued in exchange for
     Registered Securities, to permit Bearer Securities to be issued in exchange
     for Bearer Securities of other authorized denominations or to permit or
     facilitate the issuance of Securities in uncertificated form, PROVIDED THAT
     any such action shall not adversely affect the interests of the Holders of
     Securities of any series or any related coupons in any material respect; or

          (5)       to change or eliminate any of the provisions of this
     Indenture, PROVIDED THAT any such change or elimination shall become
     effective only when there is no Security Outstanding of any series created
     prior to the execution of such supplemental indenture which is entitled to
     the benefit of such provision; or

          (6)       to secure the Securities; or

          (7)       to establish the form or terms of Securities of any series
     and any related coupons as permitted or contemplated by Sections 2.01 and
     3.01; or

          (8)       to evidence and provide for the acceptance of appointment
     hereunder by a successor Trustee with respect to the Securities of one or
     more series and to add to or change any of the provisions of this Indenture
     as shall be necessary to provide for or facilitate the administration of
     the trusts hereunder by more than one Trustee; or

          (9)       to cure any ambiguity, to correct or supplement any
     provision herein which may be defective or inconsistent with any other
     provision herein, or to make any other provisions with respect to matters
     or questions arising under this Indenture which shall not be inconsistent
     with the provisions of this Indenture, PROVIDED such provisions shall not
     adversely affect the interests of the Holders of Securities of any series
     or any related coupons in any material respect; or

          (10)      to supplement any of the provisions of this Indenture to
     such extent as shall be necessary to permit or facilitate the defeasance
     and discharge of any series of Securities pursuant to Sections 4.01, 14.02
     and 14.03; PROVIDED THAT any such action shall not adversely affect the
     interests of the Holders of Securities of such series and any related
     coupons or any other series of Securities in any material respect.

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     SECTION 9.02. SUPPLEMENTAL INDENTURES WITH CONSENT OF HOLDERS. With the
consent of the Holders of not less than a majority in principal amount of all
Outstanding Securities affected by such supplemental indenture, by Act of said
Holders delivered to the Company and the Trustee, the Company, when authorized
by or pursuant to a Board Resolution, and the Trustee may enter into an
indenture or indentures supplemental hereto for the purpose of adding any
provisions to or changing in any manner or eliminating any of the provisions of
this Indenture or of modifying in any manner the rights of the Holders of
Securities and any related coupons under this Indenture; PROVIDED, HOWEVER, that
no such supplemental indenture shall, without the consent of the Holder of each
Outstanding Security affected thereby:

          (1)       change the Stated Maturity of the principal of (or premium
     or Make-Whole Amount, if any, on) or any installment of principal of or
     interest, if any, on, any Security; or reduce the principal amount thereof
     or the rate or amount of interest, if any, thereon, or any premium or
     Make-Whole Amount payable upon the redemption thereof, or reduce the amount
     of the principal of an Original Issue Discount Security that would be due
     and payable upon a declaration of acceleration of the Maturity thereof
     pursuant to Section 5.02 or the amount thereof provable in bankruptcy
     pursuant to Section 5.04, or adversely affect any right of repayment at the
     option of the Holder of any Security, or change any Place of Payment where,
     or the currency or currencies, currency unit or units or composite currency
     or currencies in which, any Security or any premium or Make-Whole Amount or
     the interest thereon is payable, or impair the right to institute suit for
     the enforcement of any such payment on or after the Stated Maturity thereof
     (or, in the case of redemption or repayment at the option of the Holder, on
     or after the Redemption Date or the Repayment Date, as the case may be), or

          (2)       reduce the percentage in principal amount of the Outstanding
     Securities of any series, the consent of whose Holders is required for any
     such supplemental indenture, or the consent of whose Holders is required
     for any waiver with respect to such series (or compliance with certain
     provisions of this Indenture or certain defaults hereunder and their
     consequences) provided for in this Indenture, or reduce the requirements of
     Section 15.04 for quorum or voting, or

          (3)       modify any of the provisions of this Section, Section 5.13
     or Section 10.09, except to increase the required percentage to effect such
     action or to provide that certain other provisions of this Indenture cannot
     be modified or waived without the consent of the Holder of each Outstanding
     Security affected thereby, PROVIDED, HOWEVER, that this clause shall not be
     deemed to require the consent of any Holder with respect to changes in the
     references to "the Trustee" and concomitant changes in this Section 9.02
     and Section 10.09, or the deletion of this proviso, in accordance with the
     requirements of Sections 6.09(b) and 9.01(8).

     It shall not be necessary for any Act of Holders under this Section 9.02 to
approve the particular form of any proposed supplemental indenture, but it shall
be sufficient if such Act shall approve the substance thereof.

     A supplemental indenture which changes or eliminates any covenant or other
provision of this Indenture which has expressly been included solely for the
benefit of one or more particular

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series of Securities, or which modifies the rights of the Holders of Securities
of such series with respect to such covenant or other provision, shall be deemed
not to affect the rights under this Indenture of the Holders of Securities of
any other series.

     SECTION 9.03. EXECUTION OF SUPPLEMENTAL INDENTURES. In executing, or
accepting the additional trusts created by, any supplemental indenture permitted
by this Article or the modification thereby of the trusts created by this
Indenture, the Trustee shall be provided with, and (subject to Section 6.12)
shall be fully protected in relying upon, an Opinion of Counsel stating that the
execution of such supplemental indenture is authorized or permitted by this
Indenture. The Trustee may, but shall not be obligated to, enter into any such
supplemental indenture which affects the Trustee's own rights, duties or
immunities under this Indenture or otherwise.

     SECTION 9.04. EFFECT OF SUPPLEMENTAL INDENTURES. Upon the execution of any
supplemental indenture under this Article, this Indenture shall be modified in
accordance therewith, and such supplemental indenture shall form a part of this
Indenture for all purposes; and every Holder of Securities theretofore or
thereafter authenticated and delivered hereunder and of any coupon appertaining
thereto shall be bound thereby.

     SECTION 9.05. CONFORMITY WITH TRUST INDENTURE ACT. Every supplemental
indenture executed pursuant to this Article shall conform to the requirements of
the TIA as then in effect.

     SECTION 9.06. REFERENCE IN SECURITIES TO SUPPLEMENTAL INDENTURES.
Securities of any series authenticated and delivered after the execution of any
supplemental indenture pursuant to this Article may, and shall, if required by
the Trustee, bear a notation in form approved by the Trustee as to any matter
provided for in such supplemental indenture. If the Company shall so determine,
new Securities of any series so modified as to conform, in the opinion of the
Trustee and the Company, to any such supplemental indenture may be prepared and
executed by the Company and authenticated and delivered by the Trustee in
exchange for Outstanding Securities of such series.

                             ARTICLE TEN - COVENANTS

     SECTION 10.01. PAYMENT OF PRINCIPAL, PREMIUM OR MAKE-WHOLE AMOUNT, IF ANY,
AND INTEREST, IF ANY. The Company covenants and agrees for the benefit of the
Holders of each series of Securities that it will duly and punctually pay the
principal of (and premium or Make-Whole Amount, if any) and interest, if any, on
the Securities of that series in accordance with the terms of such series of
Securities, any coupons appertaining thereto and this Indenture. Unless
otherwise specified as contemplated by Section 3.01 with respect to any series
of Securities, interest, if any, due on Bearer Securities on or before Maturity
shall be payable only upon presentation and surrender of the several coupons for
such interest installments as are evidenced thereby as they severally mature.
Unless otherwise specified with respect to Securities of any series pursuant to
Section 3.01, at the option of the Company (upon written notice to the Trustee),
all payments of principal may be paid by check to the registered Holder of the
Registered Security or other Person entitled thereto against surrender of such
Security.

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     SECTION 10.02. MAINTENANCE OF OFFICE OR AGENCY. If Securities of a series
are issuable only as Registered Securities, the Company shall maintain in each
Place of Payment for any series of Securities an office or agency where
Securities of that series may be presented or surrendered for payment, where
Securities of that series may be surrendered for registration of transfer or
exchange and where notices and demands to or upon the Company in respect of the
Securities of that series and this Indenture may be served. If Securities of a
series are issuable as Bearer Securities, the Company will maintain: (A) in the
Borough of Manhattan, The City of New York, an office or agency where any
Registered Securities of that series may be presented or surrendered for
payment, where any Registered Securities of that series may be surrendered for
registration of transfer, where Securities of that series may be surrendered for
exchange, where notices and demands to or upon the Company in respect of the
Securities of that series and this Indenture may be served and where Bearer
Securities of that series and related coupons may be presented or surrendered
for payment in the circumstances described in the following paragraph (and not
otherwise); (B) subject to any laws or regulations applicable thereto, in a
Place of Payment for that series which is located outside the United States, an
office or agency where Securities of that series and related coupons may be
presented and surrendered for payment; PROVIDED, HOWEVER, that if the Securities
of that series are listed on any stock exchange located outside the United
States and such stock exchange shall so require, the Company will maintain a
Paying Agent for the Securities of that series in any required city located
outside the United States, as the case may be, so long as the Securities of that
series are listed on such exchange; and (C) subject to any laws or regulations
applicable thereto, in a Place of Payment for that series located outside the
United States an office or agency where any Registered Securities of that series
may be surrendered for registration of transfer, where Securities of that series
may be surrendered for exchange and where notices and demands to or upon the
Company in respect of the Securities of that series and this Indenture may be
served. The Company will give prompt written notice to the Trustee of the
location, and any change in the location, of each such office or agency. If at
any time the Company shall fail to maintain any such required office or agency
or shall fail to furnish the Trustee with the address thereof, such
presentations, surrenders, notices and demands may be made or served at the
Corporate Trust Office of the Trustee, except that Bearer Securities of that
series and the related coupons may be presented and surrendered for payment at
the offices specified in the Security, in London, England, and the Company
hereby appoints the same as its agent to receive such respective presentations,
surrenders, notices and demands, and the Company hereby appoints the Trustee its
agent to receive all such presentations, surrenders, notices and demands.

     Unless otherwise specified with respect to any Securities pursuant to
Section 3.01, no payment of principal, premium or Make-Whole Amount or interest
on Bearer Securities shall be made at any office or agency of the Company in the
United States or by check mailed to any address in the United States or by
transfer to an account maintained with a bank located in the United States;
PROVIDED, HOWEVER, that, if the Securities of a series are payable in Dollars,
payment of principal of and any premium or Make-Whole Amount and interest on any
Bearer Security shall be made at the office of the Company's Paying Agent in the
Borough of Manhattan, The City of New York, if (but only if) payment in Dollars
of the full amount of such principal, premium or Make-Whole Amount, or interest,
as the case may be, at all offices or agencies outside the United States
maintained for the purpose by the Company in accordance with this Indenture, is
illegal or effectively precluded by exchange controls or other similar
restrictions.

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     The Company may from time to time designate one or more other offices or
agencies (in or outside the Place of Payment) where the Securities of one or
more series may be presented or surrendered for any or all of such purposes, and
may from time to time rescind such designations; PROVIDED, HOWEVER, that no such
designation or rescission shall in any manner relieve the Company of its
obligation to maintain an office or agency in accordance with the requirements
set forth above for Securities of any series for such purposes. The Company will
give prompt written notice to the Trustee of any such designation or rescission
and of any change in the location of any such other office or agency. Unless
otherwise specified with respect to any Securities pursuant to Section 3.01,
with respect to a series of Securities, the Company hereby designates as a Place
of Payment for each series of Securities, each of (i) the office or agency of
the Company in the Borough of Manhattan, The City of New York, and (ii) the
Corporate Trust Office of the Trustee (as Paying Agent); and the Company hereby
initially appoints the Trustee at its Corporate Trust Office as Paying Agent in
such city; and the Company hereby initially appoints as its agent to receive all
such presentations, surrenders, notices and demands each of the Trustee, at its
Corporate Trust Office.

     Unless otherwise specified with respect to any Securities pursuant to
Section 3.01, if and so long as the Securities of any series (i) are denominated
in a Foreign Currency or (ii) may be payable in a Foreign Currency, or so long
as it is required under any other provision of the Indenture, then the Company
will maintain with respect to each such series of Securities, or as so required,
at least one exchange rate agent (of which it shall give written notice to the
Trustee).

     SECTION 10.03. MONEY FOR SECURITIES PAYMENTS TO BE HELD IN TRUST. If the
Company shall at any time act as its own Paying Agent with respect to any series
of any Securities and any related coupons, it will, on or before each due date
of the principal of (and premium or Make-Whole Amount, if any), or interest, if
any, on any of the Securities of that series, segregate and hold in trust for
the benefit of the Persons entitled thereto a sum in the currency or currencies,
currency unit or units or composite currency or currencies in which the
Securities of such series are payable (except as otherwise specified pursuant to
Section 3.01 for the Securities of such series) sufficient to pay the principal
(and premium or Make-Whole Amount, if any) or interest, if any, so becoming due
until such sums shall be paid to such Persons or otherwise disposed of as herein
provided, and will promptly notify the Trustee of its action or failure so to
act.

     Whenever the Company shall have one or more Paying Agents for any series of
Securities and any related coupons, it will, on or before each due date of the
principal of (and premium or Make-Whole Amount, if any), or interest, if any, on
any Securities of that series, deposit with a Paying Agent a sum (in the
currency or currencies, currency unit or units or composite currency or
currencies described in the preceding paragraph) sufficient to pay the principal
(and premium or Make-Whole Amount, if any) or interest, if any, so becoming due,
such sum to be held in trust for the benefit of the Persons entitled to such
principal, premium or Make-Whole Amount, if any, or interest, if any, and
(unless such Paying Agent is the Trustee) the Company will promptly notify the
Trustee of its action or failure so to act.

     The Company will cause each Paying Agent for any series of Securities other
than the Trustee to execute and deliver to the Trustee an instrument in which
such Paying Agent shall agree with the Trustee, subject to the provisions of
this Section, that such Paying Agent will:

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          (1)       hold all sums held by it for the payment of principal of
     (and premium or Make-Whole Amount, if any) or interest, if any, on
     Securities in trust for the benefit of the Persons entitled thereto until
     such sums shall be paid to such Persons or otherwise disposed of as herein
     provided;

          (2)       give the Trustee notice of any default by the Company (or
     any other obligor upon the Securities) in the making of any such payment of
     principal (and premium or Make-Whole Amount, if any) or interest, if any,
     on the Securities of that series; and

          (3)       at any time during the continuance of any such default upon
     the written request of the Trustee, forthwith pay to the Trustee all sums
     so held in trust by such Paying Agent.

     The Company may at any time, for the purpose of obtaining the satisfaction
and discharge of this Indenture or for any other purpose, pay, or by Company
Order direct any Paying Agent to pay, to the Trustee all sums held in trust by
the Company or such Paying Agent, such sums to be held by the Trustee upon the
same trusts as those upon which such sums were held by the Company or such
Paying Agent; and, upon such payment by any Paying Agent to the Trustee, such
Paying Agent shall be released from all further liability with respect to such
sums.

     Except as otherwise provided in the Securities of any series, and subject
to applicable laws, any money deposited with the Trustee or any Paying Agent, or
then held by the Company, in trust for the payment of the principal of (and
premium or Make-Whole Amount, if any) or interest, if any, on any Security of
any series and remaining unclaimed for 2 years after such principal (and premium
or Make-Whole Amount, if any) or interest, if any, has become due and payable
shall be paid to the Company upon Company Request or (if then held by the
Company) shall be discharged from such trust; and the Holder of such Security
shall thereafter, as an unsecured general creditor, look only to the Company for
payment of such principal of (and premium or Make-Whole Amount, if any) or
interest, if any, on any Security, without interest thereon, and all liability
of the Trustee or such Paying Agent with respect to such trust money, and all
liability of the Company as trustee thereof, shall thereupon cease; PROVIDED,
HOWEVER, that the Trustee or such Paying Agent, before being required to make
any such repayment, may at the expense of the Company cause to be published
once, in an Authorized Newspaper, notice that such money remains unclaimed and
that, after a date specified therein, which shall not be less than 30 days from
the date of such publication, any unclaimed balance of such money then remaining
will be repaid to the Company.

     SECTION 10.04. EXISTENCE. Subject to Article Eight, the Company will do or
cause to be done all things necessary to preserve and keep in full force and
effect its limited partnership existence, all material rights (by agreement of
limited partnership and statute) and material franchises; PROVIDED, HOWEVER,
that the Company shall not be required to preserve any such right or franchise
if the Board of Directors shall determine that the preservation thereof is no
longer desirable in the conduct of the business of the Company.

     SECTION 10.05. MAINTENANCE OF PROPERTIES. The Company will cause all of its
material properties used or useful in the conduct of its business or the
business of any Subsidiary to be

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maintained and kept in good condition, repair and working order, normal wear and
tear, casualty and condemnation excepted, and supplied with all necessary
equipment and will cause to be made all necessary repairs, renewals,
replacements, betterments and improvements thereof (and the Company may take out
of service for a period of time, any of its properties that have been condemned
or suffered any loss due to casualty in order to make such repairs, betterments
and improvements), all as in the judgment of the Company may be necessary so
that the business carried on in connection therewith may be properly and
advantageously conducted at all times; PROVIDED, HOWEVER, that the Company and
its Subsidiaries shall not be prevented from (i) removing permanently any
property that has been condemned or suffered a loss due to casualty based on the
Company's reasonable judgment that such removal is in the best interest of the
Company, or (ii) selling or otherwise disposing of their properties for value in
the ordinary course of business.

     SECTION 10.06. INSURANCE. The Company will cause each of its and its
Subsidiaries' insurable properties to be insured against loss or damage in an
amount deemed reasonable by the Board of Directors with insurers of recognized
responsibility.

     SECTION 10.07. PAYMENT OF TAXES AND OTHER CLAIMS. The Company will pay or
discharge or cause to be paid or discharged, before the same shall become
delinquent, (1) all taxes, assessments and governmental charges levied or
imposed upon it or any Subsidiary or upon the income, profits or property of the
Company or any Subsidiary, and (2) all lawful claims for labor, materials and
supplies which, if unpaid, might by law become a lien upon the property of the
Company or any Subsidiary; PROVIDED, HOWEVER, that the Company shall not be
required to pay or discharge or cause to be paid or discharged any such tax,
assessment, charge or claim whose amount, applicability or validity is being
contested in good faith by appropriate proceedings.

     SECTION 10.08. STATEMENT AS TO COMPLIANCE. The Company will deliver to the
Trustee, within 120 days after the end of each fiscal year, a brief certificate
from the principal executive officer, principal financial officer or principal
accounting officer as to his or her knowledge of the Company's compliance with
all conditions and covenants under this Indenture and, in the event of any
noncompliance, specifying such noncompliance and the nature and status thereof.
For purposes of this Section 10.08, such compliance shall be determined without
regard to any period of grace or requirement of notice under this Indenture.

     The Company shall deliver to the Trustee, as soon as possible and in any
event within five Business Days after a Senior Officer becomes aware of the
occurrence of any Event of Default or an event which, with notice or the lapse
of time or both, would constitute an Event of Default, an Officers' Certificate
setting forth the details of such Event of Default or default and the action
which the Company proposes to take with respect thereto.

     SECTION 10.09. WAIVER OF CERTAIN COVENANTS. The Company may omit in any
particular instance to comply with any term, provision or condition set forth in
Sections 10.04 to 10.08, inclusive, if before or after the time for such
compliance the Holders of at least a majority in principal amount of all
outstanding Securities of such series, by Act of such Holders, either waive such
compliance in such instance or generally waive compliance with such covenant or
condition, but no such waiver shall extend to or affect such covenant or
condition except to the

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extent so expressly waived, and, until such waiver shall become effective, the
obligations of the Company and the duties of the Trustee in respect of any such
term, provision or condition shall remain in full force and effect.

                    ARTICLE ELEVEN - REDEMPTION OF SECURITIES

     SECTION 11.01. APPLICABILITY OF ARTICLE. Securities of any series which are
redeemable before their Stated Maturity shall be redeemable in accordance with
their terms and (except as otherwise specified as contemplated by Section 3.01
for Securities of any series) in accordance with this Article.

     SECTION 11.02. ELECTION TO REDEEM; NOTICE TO TRUSTEE. The election of the
Company to redeem any Securities shall be evidenced by or pursuant to a Board
Resolution. In case of any redemption at the election of the Company of less
than all of the Securities of any series, the Company shall, at least 45 days
prior to the giving of the notice of redemption in Section 11.04 (unless a
shorter notice shall be satisfactory to the Trustee), notify the Trustee of such
Redemption Date and of the principal amount of Securities of such series to be
redeemed. In the case of any redemption of Securities prior to the expiration of
any restriction on such redemption provided in the terms of such Securities or
elsewhere in this Indenture, the Company shall furnish the Trustee with an
Officers' Certificate evidencing compliance with such restriction.

     SECTION 11.03. SELECTION BY TRUSTEE OF SECURITIES TO BE REDEEMED. If less
than all the Securities of any series issued on the same day with the same terms
are to be redeemed, the particular Securities to be redeemed shall be selected
not more than 60 days prior to the Redemption Date by the Trustee, from the
Outstanding Securities of such series issued on such date with the same terms
not previously called for redemption, by such method as the Trustee shall deem
fair and appropriate and which may provide for the selection for redemption of
portions (equal to the minimum authorized denomination for Securities of that
series or any integral multiple thereof) of the principal amount of Securities
of such series of a denomination larger than the minimum authorized denomination
for Securities of that series.

     The Trustee shall promptly notify the Company and the Security Registrar
(if other than itself) in writing of the Securities selected for redemption and,
in the case of any Securities selected for partial redemption, the principal
amount thereof to be redeemed.

     For all purposes of this Indenture, unless the context otherwise requires,
all provisions relating to the redemption of Securities shall relate, in the
case of any Security redeemed or to be redeemed only in part, to the portion of
the principal amount of such Security which has been or is to be redeemed.

     SECTION 11.04. NOTICE OF REDEMPTION. Notice of redemption shall be given in
the manner provided in Section 1.06, not less than 30 days nor more than 60 days
prior to the Redemption Date, unless a shorter period is specified by the terms
of such series established pursuant to Section 3.01, to each Holder of
Securities to be redeemed, but failure to give such notice in the manner herein
provided to the Holder of any Security designated for redemption as a whole or
in part, or any defect in the notice to any such Holder, shall not affect the
validity of the proceedings for the redemption of any other such Security or
portion thereof.

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     Any notice that is mailed to the Holders of Registered Securities in the
manner herein provided shall be conclusively presumed to have been duly given,
whether or not the Holder receives the notice.

     All notices of redemption shall state:

          (1)       the Redemption Date,

          (2)       the Redemption Price, accrued interest to the Redemption
     Date payable as provided in Section 11.06, if any,

          (3)       if less than all Outstanding Securities of any series are to
     be redeemed, the identification (and, in the case of partial redemption,
     the principal amount) of the particular Security or Securities to be
     redeemed,

          (4)       in case any Security is to be redeemed in part only, the
     notice which relates to such Security shall state that on and after the
     Redemption Date, upon surrender of such Security, the holder will receive,
     without a charge, a new Security or Securities of authorized denominations
     for the principal amount thereof remaining unredeemed,

          (5)       that on the Redemption Date the Redemption Price and accrued
     interest to the Redemption Date payable as provided in Section 11.06, if
     any, will become due and payable upon each such Security, or the portion
     thereof, to be redeemed and, if applicable, that interest thereon shall
     cease to accrue on and after said date,

          (6)       the Place or Places of Payment where such Securities,
     together in the case of Bearer Securities with all coupons appertaining
     thereto, if any, maturing after the Redemption Date, are to be surrendered
     for payment of the Redemption Price and accrued interest, if any,

          (7)       that the redemption is for a sinking fund, if such is the
     case,

          (8)       that, unless otherwise specified in such notice, Bearer
     Securities of any series, if any, surrendered for redemption must be
     accompanied by all coupons maturing subsequent to the date fixed for
     redemption or the amount of any such missing coupon or coupons will be
     deducted from the Redemption Price, unless security or indemnity
     satisfactory to the Company, the Trustee for such series and any Paying
     Agent is furnished,

          (9)       if Bearer Securities of any series are to be redeemed and
     any Registered Securities of such series are not to be redeemed, and if
     such Bearer Securities may be exchanged for Registered Securities not
     subject to redemption on this Redemption Date pursuant to Section 3.05 or
     otherwise, the last date, as determined by the Company, on which such
     exchanges may be made, and

          (10)      the CUSIP number of such Security, if any.

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     Notice of redemption of Securities to be redeemed at the election of the
Company shall be given by the Company or, at the Company's request, by the
Trustee in the name and at the expense of the Company.

     SECTION 11.05. DEPOSIT OF REDEMPTION PRICE. On or prior to any Redemption
Date, the Company shall deposit with the Trustee or with a Paying Agent (or, if
the Company is acting as its own Paying Agent, which it may not do in the case
of a sinking fund payment under Article Twelve, segregate and hold in trust as
provided in Section 10.03) an amount of money in the currency or currencies,
currency unit or units or composite currency or currencies in which the
Securities of such series are payable (except as otherwise specified pursuant to
Section 3.01 for the Securities of such series) sufficient to pay on the
Redemption Date the Redemption Price of, and (except if the Redemption Date
shall be an Interest Payment Date) accrued interest on, all the Securities or
portions thereof which are to be redeemed on that date.

     SECTION 11.06. SECURITIES PAYABLE ON REDEMPTION DATE. Notice of redemption
having been given as aforesaid, the Securities so to be redeemed shall, on the
Redemption Date, become due and payable at the Redemption Price therein
specified in the currency or currencies, currency unit or units or composite
currency or currencies in which the Securities of such series are payable
(except as otherwise specified pursuant to Section 3.01 for the Securities of
such series) (together with accrued interest, if any, to the Redemption Date),
and from and after such date (unless the Company shall default in the payment of
the Redemption Price and accrued interest, if any) such Securities shall, if the
same were interest-bearing, cease to bear interest and the coupons for such
interest appertaining to any Bearer Securities so to be redeemed, except to the
extent provided below, shall be void. Upon surrender of any such Security for
redemption in accordance with said notice, together with all coupons, if any,
appertaining thereto maturing after the Redemption Date, such Security shall be
paid by the Company at the Redemption Price, together with accrued interest, if
any, to the Redemption Date; PROVIDED, HOWEVER, that installments of interest,
if any, on Bearer Securities whose Stated Maturity is on or prior to the
Redemption Date shall be payable only at an office or agency located outside the
United States (except as otherwise provided in Section 10.02) and, unless
otherwise specified as contemplated by Section 3.01, only upon presentation and
surrender of coupons for such interest; and PROVIDED FURTHER that installments
of interest, if any, on Registered Securities whose Stated Maturity is on or
prior to the Redemption Date shall be payable to the Holders of such Securities,
or one or more Predecessor Securities, registered as such at the close of
business on the relevant Record Dates according to their terms and the
provisions of Section 3.07.

     If any Bearer Security surrendered for redemption shall not be accompanied
by all appurtenant coupons maturing after the Redemption Date, such Security may
be paid after deducting from the Redemption Price an amount equal to the face
amount of all such missing coupons, or the surrender of such missing coupon or
coupons may be waived by the Company and the Trustee if there be furnished to
them such security or indemnity as they may require to save each of them and any
Paying Agent harmless. If thereafter the Holder of such Security shall surrender
to the Trustee or any Paying Agent any such missing coupon in respect of which a
deduction shall have been made from the Redemption Price, such Holder shall be
entitled to receive the amount so deducted; PROVIDED, HOWEVER, that interest
represented by coupons shall be payable only at an office or agency located
outside the United States (except as otherwise

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provided in Section 10.02) and, unless otherwise specified as contemplated by
Section 3.01, only upon presentation and surrender of those coupons.

     If any Security called for redemption shall not be so paid upon surrender
thereof for redemption, the principal (and premium or Make-Whole Amount, if any)
shall, until paid, bear interest from the Redemption Date at the rate borne by
the Security.

     SECTION 11.07. SECURITIES REDEEMED IN PART. Any Registered Security which
is to be redeemed only in part (pursuant to the provisions of this Article or of
Article Twelve) shall be surrendered at a Place of Payment therefor (with, if
the Company or the Trustee so requires, due endorsement by, or a written
instrument of transfer in form satisfactory to the Company and the Trustee duly
executed by, the Holder thereof or his attorney duly authorized in writing) and
the Company shall execute and the Trustee shall authenticate and deliver to the
Holder of such Security without service charge a new Security or Securities of
the same series, of any authorized denomination as requested by such Holder in
aggregate principal amount equal to and in exchange for the unredeemed portion
of the principal of the Security so surrendered. If a Global Security is so
surrendered, the Company shall execute and the Trustee shall authenticate and
deliver to the depository, without service charge, a new Global Security in a
denomination equal to and in exchange for the unredeemed portion of the
principal of the Global Security so surrendered.

                         ARTICLE TWELVE - SINKING FUNDS

     SECTION 12.01. APPLICABILITY OF ARTICLE. The provisions of this Article
shall be applicable to any sinking fund for the retirement of Securities of a
series except as otherwise specified as contemplated by Section 3.01 for
Securities of such series.

     The minimum amount of any sinking fund payment provided for by the terms of
Securities of any series is herein referred to as a "MANDATORY SINKING FUND
PAYMENT," and any payment in excess of such minimum amount provided for by the
terms of such Securities of any series is herein referred to as an "OPTIONAL
SINKING FUND PAYMENT." If provided for by the terms of any Securities of any
series, the cash amount of any mandatory sinking fund payment may be subject to
reduction as provided in Section 12.02. Each sinking fund payment shall be
applied to the redemption of Securities of any series as provided for by the
terms of Securities of such series.

     SECTION 12.02. SATISFACTION OF SINKING FUND PAYMENTS WITH SECURITIES. The
Company may, in satisfaction of all or any part of any mandatory sinking fund
payment with respect to the Securities of a series, (1) deliver Outstanding
Securities of such series (other than any previously called for redemption)
together in the case of any Bearer Securities of such series with all unmatured
coupons appertaining thereto and (2) apply as a credit Securities of such series
which have been redeemed either at the election of the Company pursuant to the
terms of such Securities or through the application of permitted optional
sinking fund payments pursuant to the terms of such Securities, as provided for
by the terms of such Securities, or which have otherwise been acquired by the
Company; PROVIDED THAT such Securities so delivered or applied as a credit have
not been previously so credited. Such Securities shall be received and credited
for such purpose by the Trustee at the applicable Redemption Price specified in
such Securities for

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redemption through operation of the sinking fund and the amount of such
mandatory sinking fund payment shall be reduced accordingly.

     SECTION 12.03. REDEMPTION OF SECURITIES FOR SINKING FUND. Not less than 60
days prior to each sinking fund payment date for Securities of any series, the
Company will deliver to the Trustee an Officers' Certificate specifying the
amount of the next ensuing mandatory sinking fund payment for that series
pursuant to the terms of that series, the portion thereof, if any, which is to
be satisfied by payment of cash in the currency or currencies, currency unit or
units or composite currency or currencies in which the Securities of such series
are payable (except as otherwise specified pursuant to Section 3.01 for the
Securities of such series) and the portion thereof, if any, which is to be
satisfied by delivering and crediting Securities of that series pursuant to
Section 12.02, and the optional amount, if any, to be added in cash to the next
ensuing mandatory sinking fund payment, and will also deliver to the Trustee any
Securities to be so delivered and credited. If such Officers' Certificate shall
specify an optional amount to be added in cash to the next ensuing mandatory
sinking fund payment, the Company shall thereupon be obligated to pay the amount
therein specified. Not less than 30 days before each such sinking fund payment
date the Trustee shall select the Securities to be redeemed upon such sinking
fund payment date in the manner specified in Section 11.03 and cause notice of
the redemption thereof to be given in the name of and at the expense of the
Company in the manner provided in Section 11.04. Such notice having been duly
given, the redemption of such Securities shall be made upon the terms and in the
manner stated in Sections 11.06 and 11.07.

              ARTICLE THIRTEEN - REPAYMENT AT THE OPTION OF HOLDERS

     SECTION 13.01. APPLICABILITY OF ARTICLE. Repayment of Securities of any
series before their Stated Maturity at the option of Holders thereof shall be
made in accordance with the terms of such Securities, if any, and (except as
otherwise specified by the terms of such series established pursuant to Section
3.01) in accordance with this Article.

     SECTION 13.02. REPAYMENT OF SECURITIES. Securities of any series subject to
repayment in whole or in part at the option of the Holders thereof will, unless
otherwise provided in the terms of such Securities, be repaid at a price equal
to the principal amount thereof, together with interest, if any, thereon accrued
to the Repayment Date specified in or pursuant to the terms of such Securities.
The Company covenants that on or prior to the Repayment Date it will deposit
with the Trustee or with a Paying Agent (or, if the Company is acting as its own
Paying Agent, segregate and hold in trust as provided in Section 10.03) an
amount of money in the currency or currencies, currency unit or units or
composite currency or currencies in which the Securities of such series are
payable (except as otherwise specified pursuant to Section 3.01 for the
Securities of such series) sufficient to pay the principal (or, if so provided
by the terms of the Securities of any series, a percentage of the principal) of,
and (except if the Repayment Date shall be an Interest Payment Date) accrued
interest on, all the Securities or portions thereof, as the case may be, to be
repaid on such date.

     SECTION 13.03. EXERCISE OF OPTION. Securities of any series subject to
repayment at the option of the Holders thereof will contain an "OPTION TO ELECT
REPAYMENT" form on the reverse of such Securities. In order for any Security to
be repaid at the option of the Holder, the Trustee must receive at the Place of
Payment therefor specified in the terms of such Security (or

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at such other place or places of which the Company shall from time to time
notify the Holders of such Securities) not earlier than 60 days nor later than
30 days prior to the Repayment Date (1) the Security so providing for such
repayment together with the "Option to Elect Repayment" form on the reverse
thereof duly completed by the Holder (or by the Holder's attorney duly
authorized in writing) or (2) a telegram, telex, facsimile transmission or a
letter from a member of a national securities exchange, or the National
Association of Securities Dealers, Inc. ("NASD"), or a commercial bank or trust
company in the United States setting forth the name of the Holder of the
Security, the principal amount of the Security, the principal amount of the
Security to be repaid, the CUSIP number, if any, or a description of the tenor
and terms of the Security, a statement that the option to elect repayment is
being exercised thereby and a guarantee that the Security to be repaid, together
with the duly completed form entitled "Option to Elect Repayment" on the reverse
of the Security, will be received by the Trustee not later than the fifth
Business Day after the date of such telegram, telex, facsimile transmission or
letter; PROVIDED, HOWEVER, that such telegram, telex, facsimile transmission or
letter shall only be effective if such Security and form duly completed are
received by the Trustee by such fifth Business Day. If less than the entire
principal amount of such Security is to be repaid in accordance with the terms
of such Security, the principal amount of such Security to be repaid, in
increments of the minimum denomination for Securities of such series, and the
denomination or denominations of the Security or Securities to be issued to the
Holder for the portion of the principal amount of such Security surrendered that
is not to be repaid, must be specified. The principal amount of any Security
providing for repayment at the option of the Holder thereof may not be repaid in
part if, following such repayment, the unpaid principal amount of such Security
would be less than the minimum authorized denomination of Securities of the
series of which such Security to be repaid is a part. Except as otherwise may be
provided by the terms of any Security providing for repayment at the option of
the Holder thereof, exercise of the repayment option by the Holder shall be
irrevocable unless waived by the Company.

     SECTION 13.04. WHEN SECURITIES PRESENTED FOR REPAYMENT BECOME DUE AND
PAYABLE. If Securities of any series providing for repayment at the option of
the Holders thereof shall have been surrendered as provided in this Article and
as provided by or pursuant to the terms of such Securities, such Securities or
the portions thereof, as the case may be, to be repaid shall become due and
payable and shall be paid by the Company on the Repayment Date therein
specified, and on and after such Repayment Date (unless the Company shall
default in the payment of such Securities on such Repayment Date) such
Securities shall, if the same were interest-bearing, cease to bear interest and
the coupons for such interest appertaining to any Bearer Securities so to be
repaid, except to the extent provided below, shall be void. Upon surrender of
any such Security for repayment in accordance with such provisions, together
with all coupons, if any, appertaining thereto maturing after the Repayment
Date, the principal amount of such Security so to be repaid shall be paid by the
Company, together with accrued interest, if any, to the Repayment Date;
PROVIDED, HOWEVER, that coupons whose Stated Maturity is on or prior to the
Repayment Date shall be payable only at an office or agency located outside the
United States (except as otherwise provided in Section 10.02) and, unless
otherwise specified pursuant to Section 3.01, only upon presentation and
surrender of such coupons; and PROVIDED FURTHER that, in the case of Registered
Securities, installments of interest, if any, whose Stated Maturity is on or
prior to the Repayment Date shall be payable (but without interest thereon,
unless the Company shall default in the payment thereof) to the Holders of such
Securities, or one or more

                                       69
<Page>

Predecessor Securities, registered as such at the close of business on the
relevant Record Dates according to their terms and the provisions of Section
3.07.

     If any Bearer Security surrendered for repayment shall not be accompanied
by all appurtenant coupons maturing after the Repayment Date, such Security may
be paid after deducting from the amount payable therefor as provided in Section
13.02 an amount equal to the face amount of all such missing coupons, or the
surrender of such missing coupon or coupons may be waived by the Company and the
Trustee if there be furnished to them such security or indemnity as they may
require to save each of them and any Paying Agent harmless. If thereafter the
Holder of such Security shall surrender to the Trustee or any Paying Agent any
such missing coupon in respect of which a deduction shall have been made as
provided in the preceding sentence, such Holder shall be entitled to receive the
amount so deducted; PROVIDED, HOWEVER, that interest, if any, represented by
coupons shall be payable only at an office or agency located outside the United
States (except as otherwise provided in Section 10.02) and, unless otherwise
specified as contemplated by Section 3.01, only upon presentation and surrender
of those coupons.

     If the principal amount of any Security surrendered for repayment shall not
be so repaid upon surrender thereof, such principal amount (together with
interest, if any, thereon accrued to such Repayment Date) shall, until paid,
bear interest from the Repayment Date at the rate of interest or Yield to
Maturity (in the case of Original Issue Discount Securities) set forth in such
Security.

     SECTION 13.05. SECURITIES REPAID IN PART. Upon surrender of any Registered
Security which is to be repaid in part only, the Company shall execute and the
Trustee shall authenticate and deliver to the Holder of such Security, without
service charge and at the expense of the Company, a new Registered Security or
Securities of the same series, of any authorized denomination specified by the
Holder, in an aggregate principal amount equal to and in exchange for the
portion of the principal of such Security so surrendered which is not to be
repaid.

              ARTICLE FOURTEEN - DEFEASANCE AND COVENANT DEFEASANCE

     SECTION 14.01. APPLICABILITY OF ARTICLE: COMPANY'S OPTION TO EFFECT
DEFEASANCE OR COVENANT DEFEASANCE. If, pursuant to Section 3.01, provision is
made for either or both of (a) defeasance of the Securities of or within a
series under Section 14.02 or (b) covenant defeasance of the Securities of or
within a series under Section 14.03, then the provisions of such Section or
Sections, as the case may be, together with the other provisions of this Article
(with such modifications thereto as may be specified pursuant to Section 3.01
with respect to any Securities), shall be applicable to such Securities and any
coupons appertaining thereto, and the Company may at its option by Board
Resolution, at any time, with respect to such Securities and any coupons
appertaining thereto, elect to have Section 14.02 (if applicable) or Section
14.03 (if applicable) be applied to such Outstanding Securities and any coupons
appertaining thereto upon compliance with the conditions set forth below in this
Article.

     SECTION 14.02. DEFEASANCE AND DISCHARGE. Upon the Company's exercise of the
above option applicable to this Section with respect to any Securities of or
within a series, the Company shall be deemed to have been discharged from its
obligations with respect to such

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Outstanding Securities and any coupons appertaining thereto on the date the
conditions set forth in Section 14.04 are satisfied (hereinafter, "DEFEASANCE").
For this purpose, such defeasance means that the Company shall be deemed to have
paid and discharged the entire indebtedness represented by such Outstanding
Securities and any coupons appertaining thereto, which shall thereafter be
deemed to be Outstanding only for the purposes of Section 14.05 and the other
Sections of this Indenture referred to in clauses (A) and (B) below, and to have
satisfied all of its other obligations under such Securities and any coupons
appertaining thereto and this Indenture insofar as such Securities and any
coupons appertaining thereto are concerned (and the Trustee, at the expense of
the Company, shall execute proper instruments acknowledging the same), except
for the following which shall survive until otherwise terminated or discharged
hereunder: (A) the rights of Holders of such Outstanding Securities and any
coupons appertaining thereto to receive, solely from the trust fund described in
Section 14.04 and as more fully set forth in such Section, payments in respect
of the principal of (and premium or Make-Whole Amount, if any) and interest, if
any, on such Securities and any coupons appertaining thereto when such payments
are due, (B) the Company's obligations with respect to such Securities under
Sections 3.05, 3.06, 10.02 and 10.03, and the Company's obligations under
Section 6.06 hereof (C) the rights, powers, trusts, duties and immunities of the
Trustee hereunder and (D) this Article. Subject to compliance with this Article
Fourteen, the Company may exercise its option under this Section notwithstanding
the prior exercise of its option under Section 14.03 with respect to such
Securities and any coupons appertaining thereto.

     SECTION 14.03. COVENANT DEFEASANCE. Upon the Company's exercise of the
above option applicable to this Section with respect to any Securities of or
within a series, the Company shall be released from its obligations under
Sections 10.04 to 10.09, inclusive, and, if specified pursuant to Section 3.01,
its obligations under any other covenant contained herein or in any indenture
supplemental hereto, with respect to such Outstanding Securities and any coupons
appertaining thereto on and after the date the conditions set forth in Section
14.04 are satisfied (hereinafter, "COVENANT DEFEASANCE"), and such Securities
and any coupons appertaining thereto shall thereafter be deemed to be not
Outstanding for the purposes of any direction, waiver, consent or declaration or
Act of Holders (and the consequences of any thereof) in connection with Sections
10.04 to 10.09, inclusive, or such other covenant, but shall continue to be
deemed Outstanding for all other purposes hereunder. For this purpose, such
covenant defeasance means that, with respect to such Outstanding Securities and
any coupons appertaining thereto, the Company may omit to comply with and shall
have no liability in respect of any term, condition or limitation set forth in
any such Section or such other covenant, whether directly or indirectly, by
reason of any reference elsewhere herein to any such Section or such other
covenant or by reason of reference in any such Section or such other covenant to
any other provision herein or in any other document and such omission to comply
shall not constitute a default or an Event of Default under Section 5.01(4) to
5.01(8), inclusive, or otherwise, as the case may be, but, except as specified
above, the remainder of this Indenture and such Securities and any coupons
appertaining thereto shall be unaffected thereby.

     SECTION 14.04. CONDITIONS TO DEFEASANCE OR COVENANT DEFEASANCE. The
following shall be the conditions to application of Section 14.02 or Section
14.03 to any Outstanding Securities of or within a series and any coupons
appertaining thereto:

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          (a)  The Company shall irrevocably have deposited or caused to be
deposited with the Trustee (or another trustee satisfying the requirements of
Section 6.07 who shall agree to comply with the provisions of this Article
Fourteen applicable to it) as trust funds in trust for the purpose of making the
following payments, specifically pledged as security for, and dedicated solely
to, the benefit of the Holders of such Securities and any coupons appertaining
thereto, (1) an amount in such currency, currencies or currency unit in which
such Securities and any coupons appertaining thereto are then specified as
payable at Stated Maturity, or (2) Government Obligations applicable to such
Securities and coupons appertaining thereto (determined on the basis of the
currency, currencies or currency unit in which such Securities and coupons
appertaining thereto are then specified as payable at Stated Maturity) which
through the scheduled payment of principal and interest, if any, in respect
thereof in accordance with their terms will provide, not later than the due date
of any payment of principal of (and premium or Make-Whole Amount, if any) and
interest, if any, on such Securities and any coupons appertaining thereto, money
in an amount, or (3) a combination thereof, in any case, in an amount,
sufficient, without consideration of any reinvestment of such principal and
interest, if any, in the opinion of a nationally recognized firm of independent
public accountants expressed in a written certification thereof delivered to the
Trustee, to pay and discharge, and which shall be applied by the Trustee (or
other qualifying trustee) to pay and discharge, (i) the principal of (and
premium or Make-Whole Amount, if any) and interest, if any, on such Outstanding
Securities and any coupons appertaining thereto on the Stated Maturity of such
principal or installment of principal or interest and (ii) any mandatory sinking
fund payments or analogous payments applicable to such Outstanding Securities
and any coupons appertaining thereto on the day on which such payments are due
and payable in accordance with the terms of this Indenture and of such
Securities and any coupons appertaining thereto.

          (b)  Such defeasance or covenant defeasance shall not result in a
breach or violation of, or constitute a default under, this Indenture or any
other material agreement or instrument to which the Company is a party or by
which it is bound.

          (c)  No Event of Default or event which with notice or lapse of time
or both would become an Event of Default with respect to such Securities and any
coupons appertaining thereto shall have occurred and be continuing on the date
of such deposit or, insofar as Sections 5.01(6) and 5.01(7) are concerned, at
any time during the period ending on the 91st day after the date of such deposit
(it being understood that this condition shall not be deemed satisfied until the
expiration of such period).

          (d)  In the case of an election under Section 14.02, the Company shall
have delivered to the Trustee an Opinion of Counsel stating that (i) the Company
has received from, or there has been published by, the Internal Revenue Service
a ruling, or (ii) since the date of execution of this Indenture, there has been
a change in the applicable Federal income tax law, in either case to the effect
that, and based thereon such opinion shall confirm that, the Holders of such
Outstanding Securities and any coupons appertaining thereto will not recognize
income, gain or loss for Federal income tax purposes as a result of such
defeasance and will be subject to Federal income tax on the same amounts, in the
same manner and at the same times as would have been the case if such defeasance
had not occurred.

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          (e)  In the case of an election under Section 14.03, the Company shall
have delivered to the Trustee an Opinion of Counsel to the effect that the
Holders of such Outstanding Securities and any coupons appertaining thereto will
not recognize income, gain or loss for Federal income tax purposes as a result
of such covenant defeasance and will be subject to Federal income tax on the
same amounts, in the same manner and at the same times as would have been the
case if such covenant defeasance had not occurred.

          (f)  The Company shall have delivered to the Trustee an Officers'
Certificate and an Opinion of Counsel, each stating that all conditions
precedent to the defeasance under Section 14.02 or the covenant defeasance under
Section 14.03 (as the case may be) have been complied with and an Opinion of
Counsel to the effect that either (i) as a result of a deposit pursuant to
subsection (a) above and the related exercise of the Company's option under
Section 14.02 or Section 14.03 (as the case may be), registration is not
required under the Investment Company Act of 1940, as amended, by the Company,
with respect to the trust funds representing such deposit or by the Trustee for
such trust funds or (ii) all necessary registrations under said Act have been
effected.

          (g)  Notwithstanding any other provisions of this Section, such
defeasance or covenant defeasance shall be effected in compliance with any
additional or substitute terms, conditions or limitations which may be imposed
on the Company in connection therewith pursuant to Section 3.01.

          (h)  The payment of amounts payable to the Trustee pursuant to this
Indenture shall be paid or provided for to the reasonable satisfaction of the
Trustee.

     SECTION 14.05. DEPOSITED MONEY AND GOVERNMENT OBLIGATIONS TO BE HELD IN
TRUST; OTHER MISCELLANEOUS PROVISIONS. Subject to the provisions of the last
paragraph of Section 10.03, all money and Government Obligations (or other
property as may be provided pursuant to Section 3.01) (including the proceeds
thereof) deposited with the Trustee (or other qualifying trustee, collectively
for purposes of this Section 14.05, the "Trustee") pursuant to Section 14.04 in
respect of any Outstanding Securities of any series and any coupons appertaining
thereto shall be held in trust and applied by the Trustee, in accordance with
the provisions of such Securities and any coupons appertaining thereto and this
Indenture, to the payment, either directly or through any Paying Agent
(including the Company acting as its own Paying Agent) as the Trustee may
determine, to the Holders of such Securities and any coupons appertaining
thereto of all sums due and to become due thereon in respect of principal (and
premium or Make-Whole Amount, if any) and interest, if any, but such money need
not be segregated from other funds except to the extent required by law.

     Unless otherwise specified with respect to any Security pursuant to Section
3.01, if, after a deposit referred to in Section 14.04(a) has been made, (a) the
Holder of a Security in respect of which such deposit was made is entitled to,
and does, elect pursuant to Section 3.01 or the terms of such Security to
receive payment in a currency or currency unit other than that in which the
deposit pursuant to Section 14.04(a) has been made in respect of such Security,
or (b) a Conversion Event occurs in respect of the currency or currency unit in
which the deposit pursuant to Section 14.04(a) has been made, the indebtedness
represented by such Security and any coupons appertaining thereto shall be
deemed to have been, and will be, fully discharged and

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satisfied through the payment of the principal of (and premium or Make-Whole
Amount, if any), and interest, if any, on such Security as the same becomes due
out of the proceeds yielded by converting (from time to time as specified below
in the case of any such election) the amount or other property deposited in
respect of such Security into the currency or currency unit in which such
Security becomes payable as a result of such election or Conversion Event based
on the applicable market exchange rate for such currency or currency unit in
effect on the second Business Day prior to each payment date, except, with
respect to a Conversion Event, for such currency or currency unit in effect (as
nearly as feasible) at the time of the Conversion Event.

     The Company shall pay and indemnify the Trustee against any tax, fee or
other charge imposed on or assessed against the Government Obligations deposited
pursuant to Section 14.04 or the principal and interest received in respect
thereof other than any such tax, fee or other charge which by law is for the
account of the Holders of such Outstanding Securities and any coupons
appertaining thereto.

     Anything in this Article to the contrary notwithstanding, subject to
Section 6.06, the Trustee shall deliver or pay to the Company from time to time
upon Company Request any money or Government Obligations (or other property and
any proceeds therefrom) held by it as provided in Section 14.04 which, in the
opinion of a nationally recognized firm of independent public accountants
expressed in a written certification thereof delivered to the Trustee, are in
excess of the amount thereof which would then be required to be deposited to
effect a defeasance or covenant defeasance, as applicable, in accordance with
this Article.

               ARTICLE FIFTEEN - MEETINGS OF HOLDERS OF SECURITIES

     SECTION 15.01. PURPOSES FOR WHICH MEETINGS MAY BE CALLED. A meeting of
Holders of Securities of any series may be called at any time and from time to
time pursuant to this Article to make, give or take any request, demand,
authorization, direction, notice, consent, waiver or other action provided by
this Indenture to be made, given or taken by Holders of Securities of such
series.

     SECTION 15.02. CALL, NOTICE AND PLACE OF MEETINGS.

          (a)  The Trustee may at any time call a meeting of Holders of
Securities of any series for any purpose specified in Section 15.01, to be held
at such time and at such place as the Trustee shall determine. Notice of every
meeting of Holders of Securities of any series, setting forth the time and the
place of such meeting and in general terms the action proposed to be taken at
such meeting, shall be given, in the manner provided in Section 1.06, not less
than 20 nor more than 180 days prior to the date fixed for the meeting.

          (b)  In case at any time the Company, pursuant to a Board Resolution,
or the Holders of at least 25% in principal amount of the Outstanding Securities
of any series shall have requested the Trustee to call a meeting of the Holders
of Securities of such series for any purpose specified in Section 15.01, by
written request setting forth in reasonable detail the action proposed to be
taken at the meeting, and the Trustee shall not have made the first publication
of the notice of such meeting within 20 days after receipt of such request or
shall not thereafter proceed to cause the meeting to be held as provided herein,
then the Company or the Holders of Securities of such series in the amount above
specified, as the case may be, may determine the

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time and the place for such meeting and may call such meeting for such purposes
by giving notice thereof as provided in subsection (a) of this Section.

     SECTION 15.03. PERSONS ENTITLED TO VOTE AT MEETINGS. To be entitled to vote
at any meeting of Holders of Securities of any series, a Person shall be (1) a
Holder of one or more Outstanding Securities of such series, or (2) a Person
appointed by an instrument in writing as proxy for a Holder or Holders of one or
more Outstanding Securities of such series by such Holder or Holders. The only
Persons who shall be entitled to be present or to speak at any meeting of
Holders of Securities of any series shall be the Persons entitled to vote at
such meeting and their counsel, any representatives of the Trustee and its
counsel and any representatives of the Company and its counsel.

     SECTION 15.04. QUORUM; ACTION. The Persons entitled to vote a majority in
principal amount of the Outstanding Securities of a series shall constitute a
quorum for a meeting of Holders of Securities of such series; PROVIDED, HOWEVER,
that if any action is to be taken at such meeting with respect to a consent or
waiver which this Indenture expressly provides may be given by the Holders of
not less than a specified percentage in principal amount of the Outstanding
Securities of a series, the Persons entitled to vote such specified percentage
in principal amount of the Outstanding Securities of such series shall
constitute a quorum. In the absence of a quorum within 30 minutes after the time
appointed for any such meeting, the meeting shall, if convened at the request of
Holders of Securities of such series, be dissolved. In any other case the
meeting may be adjourned for a period of not less than 10 days as determined by
the chairman of the meeting prior to the adjournment of such meeting. In the
absence of a quorum at the reconvening of any such adjourned meeting, such
adjourned meeting may be further adjourned for a period of not less than 10
days; at the reconvening of any meeting adjourned or further adjourned for lack
of a quorum, the Persons entitled to vote 25% in aggregate principal amount of
the then Outstanding Securities shall constitute a quorum for the taking of any
action set forth in the notice of the original meeting. Notice of the
reconvening of any adjourned meeting shall be given as provided in Section
15.02(a), except that such notice need be given only once not less than 5 days
prior to the date on which the meeting is scheduled to be reconvened.

     Except as limited by the proviso to Section 9.02, any resolution presented
to a meeting or adjourned meeting duly reconvened at which a quorum is present
as aforesaid may be adopted by the affirmative vote of the Persons entitled to
vote a majority in aggregate principal amount of the Outstanding Securities
represented at such meeting; PROVIDED, HOWEVER, that, except as limited by the
proviso to Section 9.02, any resolution with respect to any request, demand,
authorization, direction, notice, consent, waiver or other action which this
Indenture expressly provides may be made, given or taken by the Holders of a
specified percentage, which is less than a majority, in principal amount of the
Outstanding Securities of a series may be adopted at a meeting or an adjourned
meeting duly reconvened and at which a quorum is present as aforesaid by the
affirmative vote of the Holders of such specified percentage in principal amount
of the Outstanding Securities of that series.

     Any resolution passed or decision taken at any meeting of Holders of
Securities of any series duly held in accordance with this Section shall be
binding on all the Holders of Securities of such series and the related coupons,
whether or not present or represented at the meeting.

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     Notwithstanding the foregoing provisions of this Section 15.04, if any
action is to be taken at a meeting of Holders of Securities of any series with
respect to any request, demand, authorization, direction, notice, consent,
waiver or other action that this Indenture expressly provides may be made, given
or taken by the Holders of a specified percentage in principal amount of all
Outstanding Securities affected thereby, or of the Holders of such series and
one or more additional series:

               (i)       there shall be no minimum quorum requirement for such
     meeting; and

               (ii)      the principal amount of the Outstanding Securities of
     such series that vote in favor of such request, demand, authorization,
     direction, notice, consent, waiver or other action shall be taken into
     account in determining whether such request, demand, authorization,
     direction, notice, consent, waiver or other action has been made, given or
     taken under this Indenture.

     SECTION 15.05. DETERMINATION OF VOTING RIGHTS; CONDUCT AND ADJOURNMENT OF
MEETINGS.

          (a)  Notwithstanding any provisions of this Indenture, the Trustee may
make such reasonable regulations as it may deem advisable for any meeting of
Holders of Securities of a series in regard to proof of the holding of
Securities of such series and of the appointment of proxies and in regard to the
appointment and duties of inspectors of votes, the submission and examination of
proxies, certificates and other evidence of the right to vote, and such other
matters concerning the conduct of the meeting as it shall deem appropriate.
Except as otherwise permitted or required by any such regulations, the holding
of Securities shall be proved in the manner specified in Section 1.04 and the
appointment of any proxy shall be proved in the manner specified in Section 1.04
or by having the signature of the Person executing the proxy witnessed or
guaranteed by any trust company, bank or banker authorized by Section 1.04 to
certify to the holding of Bearer Securities. Such regulations may provide that
written instruments appointing proxies, regular on their face, may be presumed
valid and genuine without the proof specified in Section 1.04 or other proof.

          (b)  The Trustee shall, by an instrument in writing appoint a
temporary chairman of the meeting, unless the meeting shall have been called by
the Company or by Holders of Securities as provided in Section 15.02(b), in
which case the Company or the Holders of Securities of the series calling the
meeting, as the case may be, shall in like manner appoint a temporary chairman.
A permanent chairman and a permanent secretary of the meeting shall be elected
by vote of the Persons entitled to vote a majority in principal amount of the
Outstanding Securities of such series represented at the meeting.

          (c)  At any meeting each Holder of a Security of such series or proxy
shall be entitled to one vote for each $1,000 principal amount of the
Outstanding Securities of such series held or represented by him; PROVIDED,
HOWEVER, that no vote shall be cast or counted at any meeting in respect of any
Security challenged as not Outstanding and ruled by the chairman of the meeting
to be not Outstanding. The chairman of the meeting shall have no right to vote,
except as a Holder of a Security of such series or proxy.

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          (d)  Any meeting of Holders of Securities of any series duly called
pursuant to Section 15.02 at which a quorum is present may be adjourned from
time to time by Persons entitled to vote a majority in principal amount of the
Outstanding Securities of such series represented at the meeting, and the
meeting may be held as so adjourned without further notice.

     SECTION 15.06. COUNTING VOTES AND RECORDING ACTION OF MEETINGS. The vote
upon any resolution submitted to any meeting of Holders of Securities of any
series shall be by written ballots on which shall be subscribed the signatures
of the Holders of Securities of such series or of their representatives by proxy
and the principal amounts and serial numbers of the Outstanding Securities of
such series held or represented by them. The permanent chairman of the meeting
shall appoint 2 inspectors of votes who shall count all votes cast at the
meeting for or against any resolution and who shall make and file with the
secretary of the meeting their verified written reports in duplicate of all
votes cast at the meeting. A record, at least in duplicate, of the proceedings
of each meeting of Holders of Securities of any Series shall be prepared by the
secretary of the meeting and there shall be attached to said record the original
reports of the inspectors of votes on any vote by ballot taken thereat and
affidavits by one or more persons having knowledge of the fact, setting forth a
copy of the notice of the meeting and showing that said notice was given as
provided in Section 15.02 and, if applicable, Section 15.04. Each copy shall be
signed and verified by the affidavits of the permanent chairman and secretary of
the meeting and one such copy shall be delivered to the Company and another to
the Trustee to be preserved by the Trustee, the latter to have attached thereto
the ballots voted at the meeting. Any record so signed and verified shall be
conclusive evidence of the matters therein stated.

                  ARTICLE SIXTEEN - SUBORDINATION OF SECURITIES

     SECTION 16.01. AGREEMENT TO SUBORDINATE. Notwithstanding anything in this
Indenture to the contrary (other than Article Four of this Indenture), the
Company covenants and agrees, and each Holder of a Security, by his acceptance
thereof, likewise covenants and agrees, that, to the extent and in the manner
hereinafter set forth in this Article, the Indebtedness represented by the
Securities and the payment of any Obligations with respect to each and all of
the Securities are hereby expressly made subordinate and subject in right of
payment to the prior payment in full of all Senior Indebtedness.

     SECTION 16.02. PAYMENT OVER OF PROCEEDS UPON DISSOLUTION, ETC. In the event
of (a) any insolvency or bankruptcy case or Proceeding, or any receivership,
liquidation, reorganization or other similar case or Proceeding in connection
therewith, relative to the Company or to its creditors, as such, or to its
assets, or (b) any liquidation, dissolution or other winding up of the Company,
whether voluntary or involuntary and whether or not involving insolvency or
bankruptcy, or (c) any assignment for the benefit of creditors or any other
marshaling of assets and liabilities of the Company, then and in any such event
specified in (a), (b) or (c) above (each such event, if any, herein sometimes
referred to as a "Proceeding")

          (1)       the holders of Senior Indebtedness shall first be entitled
     to receive payment in full of all Obligations due or to become due on or in
     respect of all Senior Indebtedness, or provision shall be made for such
     payment in cash or cash equivalents or otherwise in a manner satisfactory
     to the holders of Senior Indebtedness, before the

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     Holders of the Securities are entitled to receive any payment or
     distribution on account of principal of or premium, if any, or interest on
     or other Obligations in respect of the Securities or on account of any
     purchase, redemption or other acquisition of Securities by the Company or
     any Subsidiary (individually and collectively, a "SECURITIES PAYMENT"), and

          (2)       any payment or distribution of assets of the Company of any
     kind or character, whether in cash, property or securities (other than
     Capital Stock or securities of the Company as reorganized or readjusted, or
     securities of the Company or any other corporation provided for by a plan
     of reorganization or readjustment, the payment of which is subordinate, at
     least to the extent provided in this Article Sixteen with respect to the
     Securities, to the payment in full, without diminution or modification by
     such plan, of all Senior Indebtedness), to which the Holders would be
     entitled except for the provisions of this Article Sixteen, shall be paid
     by the liquidating trustee or agent or other person making such a payment
     or distribution, directly to the holders of Senior Indebtedness (or their
     representative(s) or trustee(s) acting on their behalf), ratably according
     to the aggregate amounts remaining unpaid on account of the principal of or
     interest on and other amounts due on the Senior Indebtedness held or
     represented by each, to the extent necessary to make payment in full of all
     Senior Indebtedness remaining unpaid, after giving effect to any concurrent
     payment or distribution to the holders of such Senior Indebtedness.

     In the event that, notwithstanding the foregoing provisions of this Section
16.01, the Trustee or the Holder of any Security shall have received any payment
or distribution of assets of the Company of any kind or character, whether in
cash, property or securities (other than Capital Stock or securities of the
Company as reorganized or readjusted, or securities of the Company or any other
corporation provided for by a plan of reorganization or readjustment, the
payment of which is subordinate, at least to the extent provided in this Article
Sixteen with respect to the Securities, to the payment in full, without
diminution or modification by such plan, of Senior Indebtedness), before all
Senior Indebtedness is paid in full or payment thereof provided for in cash or
cash equivalents or otherwise in a manner satisfactory to the holders of Senior
Indebtedness, such payment or distribution shall be held in trust for the
benefit of, and be paid over to, the holders of the Senior Indebtedness
remaining unpaid (or their representative(s) or trustee(s) acting on their
behalf), ratably as aforesaid, for application to the payment of such Senior
Indebtedness until such Senior Indebtedness shall have been paid in full, after
giving effect to any concurrent payment or distribution to the holders of such
Senior Indebtedness.

     The consolidation of the Company with, or the merger of the Company into,
another Person or the liquidation or dissolution of the Company following the
conveyance or transfer of all or substantially all of its properties and assets
as an entirety to another Person upon the terms and conditions set forth in
Article Eight shall not be deemed a Proceeding for the purposes of this Section
16.02 if the Person formed by such consolidation or into which the Company is
merged or the Person which acquires by conveyance or transfer such properties
and assets as an entirety, as the case may be, shall, as a part of such
consolidation, merger, conveyance or transfer, comply with the conditions set
forth in Article Eight.

     SECTION 16.03. NO PAYMENT WHEN SENIOR INDEBTEDNESS IN DEFAULT.

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     Anything in this Indenture to the contrary notwithstanding, no payment on
account of principal of or redemption of, interest on or other amounts due on
the Securities, and no redemption, purchase, or other acquisition of the
Securities, shall be made by or on behalf of the Company (i) unless full payment
of amounts then due for principal and interest and of all other obligations then
due on all Senior Indebtedness has been made or duly provided for pursuant to
the terms of the instrument governing such Senior Indebtedness, (ii) if, at the
time of such payment, redemption, purchase or other acquisition, or immediately
after giving effect thereto, there shall exist under any Senior Indebtedness, or
any agreement pursuant to which any Senior Indebtedness is issued, any default,
which default shall not have been cured or waived and which default shall have
resulted in the full amount of such Senior Indebtedness being declared due and
payable or (iii) if, at the time of such payment, redemption, purchase or other
acquisition, the Trustee shall have received written notice from the holder or
holders of any Senior Indebtedness or their representative or representatives (a
"Payment Blockage Notice") that there exists under such Senior Indebtedness, or
any agreement pursuant to which such Senior Indebtedness is issued, any default,
which default shall not have been cured or waived, permitting the holders
thereof to declare the full amount of such Senior Indebtedness due and payable,
but only for the period (the "Payment Blockage Period") commencing on the date
of receipt of the Payment Blockage Notice and ending (unless earlier terminated
by notice given to the Trustee by the Holders of such Senior Indebtedness) on
the earlier of (A) the date on which such event of default shall have been cured
or waived or (B) 180 days from the receipt of the Payment Blockage Notice. Upon
termination of a Payment Blockage Period, payments on account of principal of or
interest on the Securities and redemptions, purchases or other acquisitions may
be made by or on behalf of the Company. Notwithstanding anything herein to the
contrary, (A) only one Payment Blockage Notice may be given during any period of
360 consecutive days with respect to the same event of default and any other
events of default on the same issue of Senior Indebtedness existing and known to
the person giving such notice at the time of such notice and (B) no new Payment
Blockage Period may be commenced by the holder or holders of the same issue of
Senior Indebtedness or their representative or representatives during any period
of 360 consecutive days unless all events of default which were the object of
the immediately preceding Payment Blockage Notice, and any other event of
default on the same issue of Senior Indebtedness existing and known to the
person giving such notice at the time of such notice, have been cured or waived.

     In the event that, notwithstanding the provisions of this Section 16.03,
payments are made by or on behalf of the Company in contravention of the
provisions of this Section 16.03, such payments shall be held by the Trustee,
any Paying Agent or the Holders, as applicable, in trust for the benefit of, and
shall be paid over to and delivered to, the holders of Senior Indebtedness or
their representative(s) or the trustee(s) under the indenture or other agreement
(if any), pursuant to which any instruments evidencing any Senior Indebtedness
may have been issued, as their respective interests may appear, for application
to the payment of all Senior Indebtedness remaining unpaid to the extent
necessary to pay all Senior Indebtedness in full in accordance with the terms of
such Senior Indebtedness, after giving effect to any concurrent payment or
distribution to or for the holders of Senior Indebtedness.

     The provisions of this Section shall not apply to any payment with respect
to which Section 16.02 would be applicable.

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     SECTION 16.04. RELIANCE BY SENIOR INDEBTEDNESS ON SUBORDINATION PROVISIONS.
Each Holder of any Security by his acceptance thereof acknowledges and agrees
that the foregoing subordination provisions are, and are intended to be, an
inducement and a consideration for each holder of any Senior Indebtedness,
whether such Senior Indebtedness was created or acquired before or after the
issuance of the Securities, to acquire and continue to hold, or to continue to
hold, such Senior Indebtedness, and such holder of Senior Indebtedness shall be
deemed conclusively to have relied on such subordination provisions in acquiring
and continuing to hold or in continuing to hold such Senior Indebtedness.

     SECTION 16.05. SUBROGATION TO RIGHTS OF HOLDERS OF SENIOR INDEBTEDNESS.
Subject to the payment in full of all Obligations due or to become due on or in
respect of Senior Indebtedness, or the provision for such payment in cash or
cash equivalents or otherwise in a manner satisfactory to the holders of Senior
Indebtedness, the Holders of the Securities shall be subrogated to the extent of
the payments or distributions made to the holders of such Senior Indebtedness
pursuant to the provisions of this Article Sixteen to the rights of the holders
of such Senior Indebtedness to receive payments and distributions of cash,
property and securities applicable to the Senior Indebtedness until the
principal of and premium, if any, and interest, if any, on the Securities shall
be paid in full. For purposes of such subrogation, no payments or distributions
to the holders of the Senior Indebtedness of any cash, property or securities to
which the Holders of the Securities or the Trustee would be entitled except for
the provisions of this Article Sixteen, and no payments over pursuant to the
provisions of this Article Sixteen to the holders of Senior Indebtedness by
Holders of the Securities or the Trustee, shall, as among the Company, its
creditors other than holders of Senior Indebtedness and the Holders of the
Securities, be deemed to be a payment or distribution by the Company to or on
account of the Senior Indebtedness.

     SECTION 16.06. PROVISIONS SOLELY TO DEFINE RELATIVE RIGHTS. The provisions
of this Article Sixteen are and are intended solely for the purpose of defining
the relative rights of the Holders of the Securities on the one hand and the
holders of Senior Indebtedness on the other hand. Nothing contained in this
Article Sixteen or elsewhere in this Indenture or in the Securities is intended
to or shall (a) impair, as among the Company, its creditors other than holders
of Senior Indebtedness and the Holders of the Securities, the obligation of the
Company, which is absolute and unconditional (and which, subject to the rights
under this Article Sixteen of the holders of Senior Indebtedness, is intended to
rank equally with all other general obligations of the Company), to pay to the
Holders of the Securities the principal of and premium, if any, and interest, if
any, on the Securities as and when the same shall become due and payable in
accordance with their terms; or (b) affect the relative rights against the
Company of the Holders of the Securities and creditors of the Company other than
the holders of Senior Indebtedness; or (c) prevent the Trustee or the Holder of
any Security from exercising all remedies otherwise permitted by applicable law
upon default under this Indenture, subject to the rights, if any, under this
Article Sixteen of the holders of Senior Indebtedness to receive cash, property
and securities otherwise payable or deliverable to the Trustee or such Holder.

     SECTION 16.07. TRUSTEE TO EFFECTUATE SUBORDINATION. Each Holder of a
Security by his acceptance thereof authorizes and directs the Trustee on his
behalf to take such action as may be necessary or appropriate to effectuate, as
between the Holders of the Securities and the holders of Senior Indebtedness,
the subordination provided in this Article Sixteen and appoints the Trustee

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his attorney-in-fact for any and all such purposes, including, in the event of
any dissolution, winding up or liquidation or reorganization under any
applicable bankruptcy law of the Company (whether in bankruptcy, insolvency or
receivership Proceedings or otherwise), the timely filing of a claim for the
unpaid balance of such Holder's Securities in the form required in such
Proceedings and the causing of such claim to be approved. If the Trustee does
not file a claim or proof of debt in the form required in such Proceedings prior
to 30 days before the expiration of the time to file such claims or proofs, then
the holders of Senior Indebtedness, jointly, or their representatives shall have
the right to file an appropriate claim for and on behalf of the Holders and to
demand, sue for, collect, receive and receipt for the payments and distributions
in respect of the Securities which are required to be paid or delivered to the
holders of Senior Indebtedness as provided in this Article Sixteen and to take
all such other action in the name of the Holders or otherwise, as such holder of
Senior Indebtedness or representative thereof may determine to be necessary or
appropriate for the enforcement of the provisions of this Article Sixteen.

     SECTION 16.08. NO WAIVER OF SUBORDINATION PROVISIONS. No right of any
present or future holder of any Senior Indebtedness to enforce subordination as
herein provided shall at any time in any way be prejudiced or impaired by any
act or failure to act on the part of the Company or by any act or failure to
act, in good faith, by any such holder or any representative or trustee
therefore, or by any noncompliance by the Company with the terms, provisions and
covenants of this Indenture, regardless of any knowledge thereof any such holder
may have or be otherwise charged with.

     Without in any way limiting the generality of the foregoing paragraph, the
holders of Senior Indebtedness may, at any time from time to time, without the
consent of or notice to the Trustee or the Holders of the Securities, without
incurring responsibility to the Holders of the Securities and without impairing
or releasing the subordination provided in this Article Sixteen or the
obligations hereunder of the Holders of the Securities to the holders of Senior
Indebtedness, do any one or more of the following: (i) change the manner, place
or terms of payment or extend the time of payment of, or renew or alter, Senior
Indebtedness, or otherwise amend or supplement in any manner Senior Indebtedness
or any instrument evidencing the same or any agreement under which Senior
Indebtedness is outstanding; (ii) sell, exchange, release or otherwise deal with
any property pledged, mortgaged or otherwise securing Senior Indebtedness; (iii)
release any Person liable in any manner for the collection of Senior
Indebtedness and settle or compromise Senior Indebtedness (which, to the extent
so settled and compromised, shall be deemed to have been paid in full for all
purposes hereof); (iv) apply any amounts received to any liability of the
Company owing to holders of Senior Indebtedness; and (v) exercise or refrain
from exercising any rights against the Company and any other Person.

     SECTION 16.09. NOTICE TO TRUSTEE. The Company shall give prompt written
notice to the Trustee of any default or event of default with respect to any
Senior Indebtedness or of any fact known to the Company which would prohibit the
making of any payment to or by the Trustee in respect of the Securities pursuant
to the provisions of this Article Sixteen. Notwithstanding the provisions of
this Article Sixteen or any other provision of this Indenture, the Trustee shall
not be charged with knowledge of the existence of any facts which would prohibit
the making of any payment to or by the Trustee in respect of the Securities,
unless and until the Trustee shall have received written notice thereof from the
Company or a holder of

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Senior Indebtedness or from any representative or trustee acting on their
behalf; and, prior to the receipt of any such written notice, the Trustee,
subject to the provisions of Section 6.12, shall be entitled in all respects to
assume that no such facts exist; provided, however, that if the Trustee shall
not have received the notice provided for in this Section at least 3 Business
Days prior to the date upon which by the terms hereof any money may become
payable for any purpose (including, without limitation, the payment of the
principal of and premium, if any, or interest on any Security), then, anything
herein contained to the contrary notwithstanding, the Trustee shall have full
power and authority to receive such money and to apply the same to the purpose
for which such money was received and shall not be affected by any notice to the
contrary which may be received by it within 3 Business Days prior to such date.
Nothing contained in this Article Sixteen or any other Article of this Indenture
or in any of the Securities shall prevent (a) the Company, at any time except
during the pendency of any Proceeding, or under the conditions described in
Section 16.03, from making payments at any time in respect of the Securities, or
(b) the application by the Trustee of any money deposited with it hereunder to
the payment of or on account of the Securities, or the retention thereof by any
Holder, if the Trustee did not have notice, as provided in this Section 16.09,
that such payment would have been prohibited by the provisions of this Article
Sixteen.

     Subject to the provisions of Section 6.12, the Trustee shall be entitled to
rely on the delivery to it of a written notice by a Person representing himself
to be a holder of Senior Indebtedness (or a representative or trustee therefore)
to establish that such notice has been given by a holder of Senior Indebtedness
(or a trustee therefore). In the event that the Trustee determines in good faith
that further evidence is required with respect to the right of any Person as a
holder of Senior Indebtedness to participate in any payment or distribution
pursuant to this Article Sixteen, the Trustee may request such Person to furnish
evidence to the reasonable satisfaction of the Trustee as to the amount of
Senior Indebtedness held by such Person, the extent to which such Person is
entitled to participate in such payment or distribution and any other facts
pertinent to the rights of such Person under this Article Sixteen, and if such
evidence is not furnished, the Trustee may defer any payment to such Person
pending judicial determination as to the right of such Person to receive such
payment.

     SECTION 16.10. RELIANCE ON JUDICIAL ORDER OR CERTIFICATE OF LIQUIDATING
AGENT. Upon any payment or distribution of assets of the Company referred to in
this Article Sixteen, the Trustee, subject to the provisions of Section 6.12,
and the Holders of the Securities shall be entitled to rely upon any order or
decree entered by any court of competent jurisdiction in which any Proceeding is
pending, or a certificate of the trustee in bankruptcy, receiver, liquidating
trustee, custodian, assignee for the benefit of creditors, agent or other Person
making such payment or distribution, delivered to the Trustee or to the Holders
of Securities, for the purpose of ascertaining the Persons entitled to
participate in such payment or distribution, the holders of the Senior
Indebtedness and other indebtedness of the Company, the amount thereof or
payable thereon, the amount or amounts paid or distributed thereon and all other
facts pertinent thereto or to this Article Sixteen.

     SECTION 16.11. TRUSTEE NOT FIDUCIARY FOR HOLDERS OF SENIOR INDEBTEDNESS.
The Trustee shall not be deemed to owe any fiduciary duty to the holders of
Senior Indebtedness. Nothing contained in this Article Sixteen or elsewhere in
this Indenture, or in any of the Securities, shall prevent the application by
the Trustee of any moneys which were deposited with

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it hereunder, prior to its receipt of written notice of facts which would
prohibit such application, for the purpose of the payment of or on account of
the principal of or interest on, the Securities unless, prior to the date on
which such application is made by the Trustee, the Trustee shall be charged with
notice under Section 16.09 hereof of the facts which would prohibit the making
of such application.

     SECTION 16.12. RIGHTS OF TRUSTEE AS HOLDER OF SENIOR INDEBTEDNESS;
PRESERVATION OF TRUSTEE'S RIGHTS. The Trustee in its individual capacity shall
be entitled to all the rights set forth in this Article Sixteen with respect to
any Senior Indebtedness which may at any time be held by it, to the same extent
as any other holder of Senior Indebtedness, and nothing in this Indenture shall
deprive the Trustee of any of its rights as such holder. Nothing in this Article
Sixteen shall apply to claims of, or payments to, the Trustee under or pursuant
to Section 6.06.

     SECTION 16.13. ARTICLE APPLICABLE TO PAYING AGENTS. In case at any time any
Paying Agent other than the Trustee shall have been appointed by the Company and
be then acting hereunder, the term "Trustee" as used in this Article Sixteen
shall in such case (unless the context otherwise requires) be construed as
extending to and including such Paying Agent within its meaning as fully for all
intents and purposes as if such Paying Agent were named in this Article Sixteen
in addition to or in place of the Trustee; provided, however, that Section 16.12
shall not apply to the Company or any Affiliate of the Company if it or such
Affiliate acts as Paying Agent.

                        [SIGNATURES FOLLOW ON NEXT PAGE]

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                                   SIGNATURES

     IN WITNESS WHEREOF, the parties hereto have caused this Indenture to be
duly executed all as of the day and year first above written.

                                      BOSTON PROPERTIES LIMITED
                                      PARTNERSHIP

                                      By: Boston Properties, Inc., its general
                                      partner

                                          By:
                                             -----------------------------------
                                             Name:
                                             Title:


                                      ________________, as Trustee


                                      By:
                                         ---------------------------------------
                                         Name:
                                         Title:

                                       84
<Page>

                                    EXHIBIT A

           FORM OF REDEEMABLE OR NON-REDEEMABLE SUBORDINATED SECURITY

                               [Face of Security]

[If the Holder of this Security (as indicated below) is The Depository Trust
Company ("DTC") or a nominee of DTC, this Security is a Global Security and the
following two legends apply:

UNLESS THIS SECURITY IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE
DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION ("DTC") TO THE COMPANY OR ITS
AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND SUCH SECURITY
ISSUED IS REGISTERED IN THE NAME OF CEDE & CO., OR IN SUCH OTHER NAME AS
REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC (AND ANY PAYMENT IS MADE TO
CEDE & CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED
REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR
OTHERWISE BY OR TO ANY PERSON IS WRONGFUL, INASMUCH AS THE REGISTERED OWNER
HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.

UNLESS AND UNTIL THIS SECURITY IS EXCHANGED IN WHOLE OR IN PART FOR SECURITIES
IN CERTIFICATED FORM, THIS SECURITY MAY NOT BE TRANSFERRED EXCEPT AS A WHOLE BY
DTC TO A NOMINEE THEREOF OR BY A NOMINEE THEREOF TO DTC OR ANOTHER NOMINEE OF
DTC OR BY DTC OR ANY SUCH NOMINEE TO A SUCCESSOR OF DTC OR A NOMINEE OF SUCH
SUCCESSOR.]

[IF THIS SECURITY IS AN ORIGINAL ISSUE DISCOUNT SECURITY, INSERT -- FOR PURPOSES
OF SECTION 1273 and 1275 OF THE UNITED STATES INTERNAL REVENUE CODE, THE AMOUNT
OF ORIGINAL ISSUE DISCOUNT ON THIS SECURITY IS % OF ITS PRINCIPAL AMOUNT, THE
ISSUE DATE IS ______, 20_ [AND] THE YIELD TO MATURITY IS __%. [THE METHOD USED
TO DETERMINE THE AMOUNT OF ORIGINAL ISSUE DISCOUNT APPLICABLE TO THE SHORT
ACCRUAL PERIOD OF _____, 20_ TO ____, 20_ , IS_% OF THE PRINCIPAL AMOUNT OF THIS
SECURITY.]

                     BOSTON PROPERTIES LIMITED PARTNERSHIP.
                             [Designation of Series]

No. _______                                                      $______________

CUSIP No.________

BOSTON PROPERTIES LIMITED PARTNERSHIP, a Delaware limited partnership (herein
referred to as the "Company," which term includes any successor corporation
under the Indenture referred to on the reverse hereof), for value received,
hereby promises to pay to ________________________ or registered assigns the
principal sum of _______ Dollars on _____________________ (the "Stated Maturity
Date") [or INSERT DATE FIXED FOR EARLIER REDEMPTION (the "Redemption Date," and
together with the Stated Maturity Date with respect to principal repayable on
such date, the "Maturity Date.")]

[IF THE SECURITY IS TO BEAR INTEREST PRIOR TO MATURITY, INSERT -- and to pay
interest thereon from ______________ or from the most recent Interest Payment
Date to which interest has been paid

                                       A-1
<Page>

or duly provided for, semi-annually on __________ and _________ in each year
(each, an "Interest Payment Date"), commencing __________, at the rate of __%
per annum, until the principal hereof is paid or duly provided for. The interest
so payable, and punctually paid or duly provided for, on any Interest Payment
Date will, as provided in such Indenture, be paid to the Holder in whose name
this Security (or one or more Predecessor Securities) is registered at the close
of business on the Regular Record Date for such interest, which shall be the
________ or ______ (whether or not a Business Day), as the case may be, next
preceding such Interest Payment Date [at the office or agency of the Company
maintained for such purpose; PROVIDED, HOWEVER, that such interest may be paid,
at the Company's option, by mailing a check to such Holder at its registered
address or by transfer of funds to an account maintained by such Holder within
the United States]. Any such interest not so punctually paid or duly provided
for shall forthwith cease to be payable to the Holder on such Regular Record
Date, and may be paid to the Holder in whose name this Security (or one or more
Predecessor Securities) is registered at the close of business on a Special
Record Date for the payment of such Defaulted Interest to be fixed by the
Trustee, notice whereof shall be given to Holders of Securities of this series
not less than 10 days prior to such Special Record Date, or may be paid at any
time in any other lawful manner not inconsistent with the requirements of any
securities exchange on which the Securities of this series may be listed, and
upon such notice as may be required by such exchange, all as more fully provided
in the Indenture. Interest will be computed on the basis of a 360-day year of
twelve 30-day months.]

[IF THE SECURITY IS NOT TO BEAR INTEREST PRIOR TO MATURITY, INSERT -- The
principal of this Security shall not bear interest except in the case of a
default in payment of principal upon acceleration, upon redemption or at the
[Stated] Maturity Date and in such case the overdue principal of this Security
shall bear interest at the rate of % per annum (to the extent that the payment
of such interest shall be legally enforceable), which shall accrue from the date
of such default in payment to the date payment of such principal has been made
or duly provided for. Interest on any overdue principal shall be payable on
demand. Any such interest on any overdue principal that is not so paid on demand
shall bear interest at the rate of % per annum (to the extent that the payment
of such interest shall be legally enforceable), which shall accrue from the date
of such demand for payment to the date payment of such interest has been made or
duly provided for, and such interest shall also be payable on demand.]

The principal of this Security payable on the Stated Maturity Date [or the
principal of, premium or Make-Whole Amount, if any, and, if the Redemption Date
is not an Interest Payment Date, interest on this Security payable on the
Redemption Date] will be paid against presentation of this Security at the
office or agency of the Company maintained for that purpose in
___________________, in such coin or currency of the United States of America as
at the time of payment is legal tender for the payment of public and private
debts.

Interest payable on this Security on any Interest Payment Date and on the
[Stated] Maturity Date [or Redemption Date, as the case may be,] will include
interest accrued from and including the next preceding Interest Payment Date in
respect of which interest has been paid or duly provided for (or from and
including ____________, if no interest has been paid on this Security) to but
excluding such Interest Payment Date or the [Stated] Maturity Date [or
Redemption Date, as the case may be.] If any Interest Payment Date or the
[Stated] Maturity Date or [Redemption Date] falls on a day that is not a
Business Day, as defined below, principal, premium or Make-Whole

                                       A-2
<Page>

Amount, if any, and/or interest payable with respect to such Interest Payment
Date or [Stated] Maturity Date [or Redemption Date, as the case may be,] will be
paid on the next succeeding Business Day with the same force and effect as if it
were paid on the date such payment was due, and no interest shall accrue on the
amount so payable for the period from and after such Interest Payment Date or
[Stated] Maturity Date [or Redemption Date, as the case may be.] "Business Day"
means any day, other than a Saturday or Sunday, that is neither a legal holiday
nor a day on which banking institutions in The City of New York are required or
authorized by law, regulation or executive order to close.

[IF THIS SECURITY IS A GLOBAL SECURITY, INSERT -- All payments of principal,
premium or Make-Whole Amount, if any, and interest in respect of this Security
will be made by the Company in immediately available funds.]

Reference is hereby made to the further provisions of this Security set forth on
the reverse hereof, which further provisions shall for all purposes have the
same effect as if set forth at this place.

Unless the Certificate of Authentication hereon has been executed by the Trustee
by manual signature of one of its authorized signatories, this Security shall
not be entitled to any benefit under the Indenture, or be valid or obligatory
for any purpose.

IN WITNESS WHEREOF, the Company has caused this instrument to be duly executed
under its facsimile corporate seal.

Dated:_____________________

                                      BOSTON PROPERTIES LIMITED
                                      PARTNERSHIP

                                      By: Boston Properties, Inc., its general
                                      partner

                                          By:
                                             -----------------------------------
                                             Name:
                                             Title:


Attest:

---------------------------
Secretary

                                       A-3
<Page>

                              [Reverse of Security]

                      BOSTON PROPERTIES LIMITED PARTNERSHIP

This Security is one of a duly authorized issue of securities of the Company
(herein called the "Securities"), issued and to be issued in one or more series
under an

Indenture, dated as of _____________, 200_ (herein called the "Indenture")
between the Company and _________________, as Trustee (herein called the
"Trustee," which term includes any successor trustee under the Indenture with
respect to the series of which this Security is a part), to which Indenture and
all indentures supplemental thereto reference is hereby made for a statement of
the respective rights, limitations of rights, duties and immunities thereunder
of the Company, the Trustee and the Holders of the Securities, and of the terms
upon which the Securities are, and are to be, authenticated and delivered. This
Security is one of the duly authorized series of Securities designated on the
face hereof (collectively, the "Securities"), [IF APPLICABLE, INSERT -- and the
aggregate principal amount of the Securities to be issued under such series is
limited to $______ (except for Securities authenticated and delivered upon
transfer of, or in exchange for, or in lieu of other Securities).] All terms
used in this Security which are defined in the Indenture shall have the meanings
assigned to them in the Indenture.

If an Event of Default, as defined in the Indenture, shall occur and be
continuing, the principal of the Securities of this series may be declared due
and payable in the manner and with the effect provided in the Indenture.

[IF APPLICABLE, INSERT -- The Securities may not be redeemed prior to the Stated
Maturity Date.]

[IF APPLICABLE, INSERT -- The Securities are subject to redemption [ (l) (IF
APPLICABLE, INSERT -- on _________ in any year commencing with the year ____ and
ending with the year ____ through operation of the sinking fund for this series
at a Redemption Price equal to 100% of the principal amount, and (2) ] [IF
APPLICABLE, INSERT -- at any time [on or after ___________], as a whole or in
part, at the election of the Company, at the following Redemption Prices
(expressed as percentages of the principal amount):

 If redeemed on or before _______, __% and if redeemed during the 12-month
period beginning _______ of the years indicated at the Redemption Prices
indicated below.

<Table>
<Caption>
   Year        Redemption Price    Year    Redemption Price
   ----        ----------------    ----    ----------------
<S>            <C>                 <C>     <C>

</Table>

and thereafter at a Redemption Price equal to __% of the principal amount,
together in the case of any such redemption [IF APPLICABLE, INSERT -- (whether
through operation of the sinking fund or otherwise)] with accrued interest to
the Redemption Date; PROVIDED, HOWEVER, that installments of interest on this
Security whose Stated Maturity is on or prior to such Redemption Date will be
payable to the Holder of this Security, or one or more Predecessor Securities,
of record at the

                                       A-4
<Page>

close of business on the relevant Record Dates referred to on the face hereof,
all as provided in the Indenture.]

     [IF APPLICABLE, INSERT -- The Securities are subject to redemption (1) on
_______ in any year commencing with the year ____ and ending with the year ____
through operation of the sinking fund for this series at the Redemption Prices
for redemption through operation of the sinking fund (expressed as percentages
of the principal amount) set forth in the table below, and (2) at any time [on
or after _______], as a whole or in part, at the election of the Company, at the
Redemption Prices for redemption otherwise than through operation of the sinking
fund (expressed as percentages of the principal amount) set forth in the table
below: If redeemed during the 12-month period beginning ________ of the years
indicated,

<Table>
<Caption>
                                                 Redemption Price for
                 Redemption Price for         Redemption Otherwise Than
                  Redemption Through             Through Operation of
     Year    Operation of the Sinking Fund        the Sinking Fund
     ----    -----------------------------    --------------------------
<S>         <C>                               <C>


</Table>

and thereafter at a Redemption Price equal to ____% of the principal amount,
together in the case of any such redemption (whether through operation of the
sinking fund or otherwise) with accrued interest to the Redemption Date;
PROVIDED, HOWEVER, that installments of interest on this Security whose Stated
Maturity is on or prior to such Redemption Date will be payable to the Holder of
this Security, or one or more Predecessor Securities, of record at the close of
business on the relevant Record Dates referred to on the face hereof, all as
provided in the Indenture.]

     [IF APPLICABLE, INSERT -- Notwithstanding the foregoing, the Company may
not, prior to _______, redeem any Securities as contemplated by [Clause (2) of]
the preceding paragraph as a part of, or in anticipation of, any refunding
operation by the application, directly or indirectly, of moneys borrowed having
an interest cost to the Company (calculated in accordance with generally
accepted financial practice) of less than __% per annum.]

     [IF APPLICABLE, INSERT -- The sinking fund for the Securities provides for
the redemption on _______ in each year, beginning with the year ____ and ending
with the year ____, of [not less than] $_______] [("mandatory sinking fund") and
not more than $_______] aggregate principal amount of the Securities. [The
Securities acquired or redeemed by the Company otherwise than through
[mandatory] sinking fund payments may be credited against subsequent [mandatory]
sinking fund payments otherwise required to be made in the [DESCRIBE ORDER]
order in which they become due.]]

     Notice of redemption will be given by mail to Holders of Securities, not
less than 30 nor more than 60 days prior to the Redemption Date, all as provided
in the Indenture.

     In the event of redemption of this Security in part only, a new Security or
Securities for the unredeemed portion hereof shall be issued in the name of the
Holder hereof upon the cancellation hereof.

                                       A-5
<Page>

     The Indenture permits, with certain exceptions as therein provided, the
amendment thereof and the modification of the rights and obligations of the
Company and the rights of the Holders of the Securities under the Indenture at
any time by the Company and the Trustee with the consent of the Holders of not
less than a majority of the aggregate principal amount of all Securities issued
under the Indenture at the time Outstanding and affected thereby. The Indenture
also contains provisions permitting the Holders of not less than a majority of
the aggregate principal amount of the Outstanding Securities, on behalf of the
Holders of all such Securities, to waive compliance by the Company with certain
provisions of the Indenture. Furthermore, provisions in the Indenture permit the
Holders of not less than a majority of the aggregate principal amount, in
certain instances, of the Outstanding Securities of any series to waive, on
behalf of all of the Holders of Securities of such series, certain past defaults
under the Indenture and their consequences. Any such consent or waiver by the
Holder of this Security shall be conclusive and binding upon such Holder and
upon all future Holders of this Security and other Securities issued upon the
registration of transfer hereof or in exchange herefor or in lieu hereof,
whether or not notation of such consent or waiver is made upon this Security.

     No reference herein to the Indenture and no provision of this Security or
of the Indenture shall alter or impair the obligation of the Company, which is
absolute and unconditional, to pay the principal of (and premium or Make-Whole
Amount, if any) and interest on this Security at the times, places and rate, and
in the coin or currency, herein prescribed.

     As provided in the Indenture and subject to certain limitations therein
[and herein] set forth, the transfer of this Security is registrable in the
Security Register of the Company upon surrender of this Security for
registration of transfer at the office or agency of the Company in any place
where the principal of (and premium or Make-Whole Amount, if any) and interest
on this Security are payable, duly endorsed by, or accompanied by a written
instrument of transfer in form satisfactory to the Company and the Security
Registrar duly executed by, the Holder hereof or by his attorney duly authorized
in writing, and thereupon one or more new Securities, of authorized
denominations and for the same aggregate principal amount, will be issued to the
designated transferee or transferees.

     As provided in the Indenture and subject to certain limitations therein
[and herein] set forth, this Security is exchangeable for a like aggregate
principal amount of Securities of different authorized denominations but
otherwise having the same terms and conditions, as requested by the Holder
hereof surrendering the same.

     This Security is subordinated to the prior payment in full in cash of
Senior Indebtedness to the extent set forth in Article Sixteen of the Indenture.

     The Securities of this series are issuable only in registered form [without
coupons] in denominations of $_______ and any integral multiple thereof.

     No service charge shall be made for any such registration of transfer or
exchange, but the Company may require payment of a sum sufficient to cover any
tax or other governmental charge payable in connection therewith.

                                       A-6
<Page>

     Prior to due presentment of this Security for registration of transfer, the
Company, the Trustee and any agent of the Company or the Trustee may treat the
Person in whose name this Security is registered as the owner hereof for all
purposes, whether or not this Security be overdue, and neither the Company, the
Trustee nor any such agent shall be affected by notice to the contrary.

     No Holder shall have any recourse under or upon any obligation, covenant or
agreement contained in the Indenture, or any indenture supplemental thereto, or
this Security, or because of any indebtedness evidenced thereby, including the
payment of the principal of or premium or Make-Whole Amount, if any, or the
interest on this Security, or for any claim based hereon, or otherwise in
respect hereof, against (i) Boston Properties or any other past, present or
future partner in the Company, (ii) any other person or entity which owns an
interest, directly or indirectly, in any partner of the Company, or (iii) any
past, present or future stockholder, employee, officer or director, as such, of
the Company or Boston Properties or any successor under any rule of law, statute
or constitutional provision or by the enforcement of any assessment or by any
legal or equitable proceeding or otherwise. Each Holder hereof, by the
acceptance hereof and as part of the consideration for the issue hereof,
expressly waives and releases all such liability by accepting this Security. The
waiver and release are part of the consideration for the issue of the Security.

     The Indenture and the Securities shall be governed by and construed in
accordance with the laws of the State of New York applicable to agreements made
and to be performed entirely in such State.

                                       A-7
<Page>

                                    EXHIBIT B

                             FORMS OF CERTIFICATION

                                   EXHIBIT B-1

               FORM OF CERTIFICATE TO BE GIVEN BY PERSON ENTITLED
                TO RECEIVE BEARER SECURITY OR TO OBTAIN INTEREST
                       PAYABLE PRIOR TO THE EXCHANGE DATE

                                   CERTIFICATE

     [Insert title or sufficient description of Securities to be delivered]

     This is to certify that, as of the date hereof, and except as set forth
below, the above-captioned Securities held by you for our account (i) are owned
by person(s) that are not citizens or residents of the United States, domestic
partnerships, domestic corporations or any estate or trust the income of which
is subject to United States Federal income taxation regardless of its source
("United States person(s)"), (ii) are owned by United States person(s) that are
(a) foreign branches of United States financial institutions (financial
institutions, as defined in United States Treasury Regulations Section
2.165-12(c)(1)(v) are herein referred to as "financial institutions") purchasing
for their own account or for resale, or (b) United States person(s) who acquired
the Securities through foreign branches of United States financial institutions
and who hold the Securities through such United States financial institutions on
the date hereof (and in either case (a) or (b), each such United States
financial institution hereby agrees, on its own behalf or through its agent,
that you may advise Boston Properties Limited Partnership or its agent that such
financial institution will comply with the requirements of Section 165(j)(3)(A),
(B) or (C) of the United States Internal Revenue Code of 1986, as amended, and
the regulations thereunder), or (iii) are owned by United States or foreign
financial institution(s) for purposes of resale during the restricted period (as
defined in United States Treasury Regulations Section 1.163-5(c)(2)(i)(D)(7)),
and, in addition, if the owner is a United States or foreign financial
institution described in clause (iii) above (whether or not also described in
clause (i) or (ii)), this is to further certify that such financial institution
has not acquired the Securities for purposes of resale directly or indirectly to
a United States person or to a person within the United States or its
possessions.

     As used herein, "United States" means the United States of America
(including the States and the District of Columbia); and its "possessions"
include Puerto Rico, the U.S. Virgin Islands, Guam, American Samoa, Wake Island
and the Northern Mariana Islands.

     We undertake to advise you promptly by tested telex or by telecopy on or
prior to the date on which you intend to submit your certification relating to
the above-captioned Securities held by you for our account in accordance with
your operating procedures if any applicable statement herein is not correct on
such date, and in the absence of any such notification it may be assumed that
this certification applies as of such date.

     This certificate excepts and does not relate to [U.S.$] of such interest in
the above-captioned Securities in respect of which we are not able to certify
and as to which we

                                       B-1
<Page>

understand an exchange for an interest in a permanent Global Security or an
exchange for and delivery of definitive Securities (or, if relevant, collection
of any interest) cannot be made until we do so certify.

     We understand that this certificate may be required in connection with
certain tax legislation in the United States. If administrative or legal
proceedings are commenced or threatened in connection with which this
certificate is or would be relevant, we irrevocably authorize you to produce
this certificate or a copy thereof to any interested party in such proceedings.

Dated: ________, ____
[To be dated no earlier than the 15th day prior to (i) the Exchange Date or (ii)
the relevant Interest Payment Date occurring prior to the Exchange Date, as
applicable]

                                        [Name of Person Making Certification]


                                        ----------------------------------------
                                        (Authorized Signature)
                                        Name:
                                        Title:

                                       B-2
<Page>

                                   EXHIBIT B-2

                  FORM OF CERTIFICATE TO BE GIVEN BY EUROCLEAR
               AND CLEARSTREAM IN CONNECTION WITH THE EXCHANGE OF
                 A PORTION OF A TEMPORARY GLOBAL SECURITY OR TO
               OBTAIN INTEREST PAYABLE PRIOR TO THE EXCHANGE DATE

                                   CERTIFICATE

     [Insert title or sufficient description of Securities to be delivered]

     This is to certify that, based solely on written certifications that we
have received in writing, by tested telex or by electronic transmission from
each of the persons appearing in our records as persons entitled to a portion of
the principal amount set forth below (our "Member Organizations") substantially
in the form attached hereto, as of the date hereof, [U.S.$] principal amount of
the above-captioned Securities (i) is owned by person(s) that are not citizens
or residents of the United States, domestic partnerships, domestic corporations
or any estate or trust the income of which is subject to United States Federal
income taxation regardless of its source ("United States person(s)"), (ii) is
owned by United States person(s) that are (a) foreign branches of United States
financial institutions (financial institutions, as defined in U.S. Treasury
Regulations Section 1.165-12(c)(1)(v) are herein referred to as "financial
institutions") purchasing for their own account or for resale, or (b) United
States person(s) who acquired the Securities through foreign branches of United
States financial institutions and who hold the Securities through such United
States financial institutions on the date hereof (and in either case (a) or (b),
each such financial institution has agreed, on its own behalf or through its
agent, that we may advise Boston Properties Limited Partnership or its agent
that such financial institution will comply with the requirements of Section
165(j)(3)(A), (B) or (C) of the Internal Revenue Code of 1986, as amended, and
the regulations thereunder), or (iii) is owned by United States or foreign
financial institution(s) for purposes of resale during the restricted period (as
defined in United States Treasury Regulations Section 1.163-5(c)(2)(i)(D)(7)),
and, to the further effect, that financial institutions described in clause
(iii) above (whether or not also described in clause (i) or (ii)) have certified
that they have not acquired the Securities for purposes of resale directly or
indirectly to a United States person or to a person within the United States or
its possessions.

     As used herein, "United States" means the United States of America
(including the States and the District of Columbia); and its "Possessions"
include Puerto Rico, the U.S. Virgin Islands, Guam, American Samoa, Wake Island
and the Northern Mariana Islands.

     We further certify that (i) we are not making available herewith for
exchange (or, if relevant, collection of any interest) any portion of the
temporary Global Security representing the above-captioned Securities excepted
in the above-referenced certificates of Member Organizations and (ii) as of the
date hereof we have not received any notification from any of our Member
Organizations to the effect that the statements made by such Member
Organizations with respect to any portion of the part submitted herewith for
exchange (or, if relevant, collection of any interest) are no longer true and
cannot be relied upon as of the date hereof.

                                       B-3
<Page>

     We understand that this certification is required in connection with
certain tax legislation in the United States. If administrative or legal
proceedings are commenced or threatened in connection with which this
certificate is or would be relevant, we irrevocably authorize you to produce
this certificate or a copy thereof to any interested party in such proceedings.

Dated: _______ ____

     [To be dated no earlier than the Exchange Date or the relevant Interest
Payment Date occurring prior to the Exchange Date, as applicable]

                                      [Morgan Guaranty Trust Company of New
                                      York, Brussels Office,] as Operator of the
                                      Euroclear System [Clearstream Banking
                                      Luxemburg]


                                      By:
                                         ---------------------------------------

                                       B-4