<PAGE>

                                                                     EXHIBIT 4.1

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

                        AMERICAN CAMPUS COMMUNITIES, INC.

                                       TO

                 J.P. MORGAN TRUST COMPANY, NATIONAL ASSOCIATION

                                   as Trustee

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

                                    Indenture

                          Dated as of October 17, 2005

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

                             Senior Debt Securities

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

<PAGE>

                        AMERICAN CAMPUS COMMUNITIES, INC.

        Reconciliation and tie between Trust Indenture Act of 1939, as amended
(the "Trust Indenture Act" or "TIA") and Indenture, dated as of October 17,
2005.

<TABLE>
<CAPTION>
  Trust Indenture Act Section           Indenture Section
  ---------------------------           -----------------
<S>                                     <C>
Section 310(a)(1)...............           6.07
(a)(2)..........................           6.07
(b).............................           6.07, 6.08
Section 312(b)..................           7.01
Section 312(c)..................           7.01
Section 313(a)..................           7.02
(c).............................           7.02, 7.03
Section 314(a)..................           7.03
(a)(4)..........................          10.09
(c)(1)..........................           1.02
(c)(2)..........................           1.02
(e).............................           1.02
Section 315(b)..................           6.01
Section 316(a) (last sentence)..           1.01("Outstanding")
(a)(1)(A).......................           5.02, 5.12
(a)(1)(B).......................           5.13
(b).............................           5.08
Section 317(a)(1)...............           5.03
(a)(2)..........................           5.04
Section 318(a)..................           1.14
(c).............................           1.14
</TABLE>

---------------
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 of the Trust
Indenture Act are a part of and govern every qualified indenture, whether or not
physically contained therein.

                                       i

<PAGE>

                                TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                                                          Page
                                                                                                          ----
<S>                                                                                                       <C>
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................................               11
   SECTION 1.04       Acts of Holders.......................................................               12
   SECTION 1.05       Notices, etc., to Trustee and Company.................................               13
   SECTION 1.06       Notice to Holders; Waiver.............................................               14
   SECTION 1.07       Counterparts; Effect of Headings and Table of Contents................               15
   SECTION 1.08       Successors and Assigns................................................               15
   SECTION 1.09       Severability Clause...................................................               15
   SECTION 1.10       Benefits of Indenture.................................................               15
   SECTION 1.11       Governing Law.........................................................               15
   SECTION 1.12       Legal Holidays........................................................               16
   SECTION 1.13       Immunity of Stockholders, Directors, Officers and Agents of the
                      Company...............................................................               16
   SECTION 1.14       Conflict with Trust Indenture Act.....................................               16

ARTICLE TWO - SECURITIES FORMS..............................................................               16
   SECTION 2.01       Forms of Securities...................................................               16
   SECTION 2.02       Form of Trustee's Certificate of Authentication.......................               17
   SECTION 2.03       Securities Issuable in Global Form....................................               17

ARTICLE THREE - THE SECURITIES..............................................................               18
   SECTION 3.01       Amount Unlimited; Issuable in Series..................................               18
   SECTION 3.02       Denominations.........................................................               22
   SECTION 3.03       Execution, Authentication, Delivery and Dating........................               22
   SECTION 3.04       Temporary Securities..................................................               24
   SECTION 3.05       Registration, Registration of Transfer and Exchange...................               26
   SECTION 3.06       Mutilated, Destroyed, Lost and Stolen Securities......................               29
   SECTION 3.07       Payment of Interest; Interest Rights Preserved........................               30
   SECTION 3.08       Persons Deemed Owners.................................................               32
   SECTION 3.09       Cancellation..........................................................               33
   SECTION 3.10       Computation of Interest...............................................               34

ARTICLE FOUR - SATISFACTION AND DISCHARGE...................................................               34
   SECTION 4.01       Satisfaction and Discharge of Indenture...............................               34
   SECTION 4.02       Application of Trust Funds............................................               35

ARTICLE FIVE - REMEDIES.....................................................................               35
   SECTION 5.01       Events of Default.....................................................               35
   SECTION 5.02       Acceleration of Maturity; Rescission and Annulment....................               37
   SECTION 5.03       Collection of Indebtedness and Suits for Enforcement by Trustee.......               38
   SECTION 5.04       Trustee May File Proofs of Claim......................................               39
</TABLE>

                                       ii

<PAGE>

<TABLE>
<S>                                                                                                        <C>
   SECTION 5.05       Trustee May Enforce Claims Without Possession of Securities or
                      Coupons...............................................................               39
   SECTION 5.06       Application of Money Collected........................................               40
   SECTION 5.07       Limitation on Suits...................................................               40
   SECTION 5.08       Unconditional Right of Holders to Receive Principal, Premium or
                      Make-Whole Amount, if any, Interest and Additional Amounts............               41
   SECTION 5.09       Restoration of Rights and Remedies....................................               41
   SECTION 5.10       Rights and Remedies Cumulative........................................               41
   SECTION 5.11       Delay or Omission Not Waiver..........................................               41
   SECTION 5.12       Control by Holders of Securities......................................               42
   SECTION 5.13       Waiver of Past Defaults...............................................               42
   SECTION 5.14       Waiver of Usury, Stay or Extension Laws...............................               42
   SECTION 5.15       Undertaking for Costs.................................................               42

ARTICLE SIX - THE TRUSTEE...................................................................               43
   SECTION 6.01       Notice of Defaults....................................................               43
   SECTION 6.02       Certain Rights of Trustee.............................................               43
   SECTION 6.03       Not Responsible for Recitals or Issuance of Securities................               45
   SECTION 6.04       May Hold Securities...................................................               45
   SECTION 6.05       Money Held in Trust...................................................               45
   SECTION 6.06       Compensation and Reimbursement........................................               45
   SECTION 6.07       Corporate Trustee Required; Eligibility; Conflicting Interests........               46
   SECTION 6.08       Resignation and Removal; Appointment of Successor.....................               46
   SECTION 6.09       Acceptance of Appointment by Successor................................               48
   SECTION 6.10       Merger, Conversion, Consolidation or Succession to Business...........               49
   SECTION 6.11       Appointment of Authenticating Agent...................................               49
   SECTION 6.12       Certain Duties and Responsibilities of the Trustee....................               51

ARTICLE SEVEN - HOLDERS' LISTS AND REPORTS BY TRUSTEE AND COMPANY...........................               52
   SECTION 7.01       Disclosure of Names and Addresses of Holders..........................               52
   SECTION 7.02       Reports by Trustee....................................................               52
   SECTION 7.03       Reports by Company....................................................               52
   SECTION 7.04       Company to Furnish Trustee Names and Addresses of Holders.............               53

ARTICLE EIGHT - CONSOLIDATION, MERGER, SALE, LEASE OR CONVEYANCE............................               53
   SECTION 8.01       Consolidations and Mergers of  Company and Sales, Leases and
                      Conveyances Permitted Subject to Certain Conditions...................               53
   SECTION 8.02       Rights and Duties of Successor Corporation............................               53
   SECTION 8.03       Officers' Certificate and Opinion of Counsel..........................               54

ARTICLE NINE - SUPPLEMENTAL INDENTURES......................................................               54
   SECTION 9.01       Supplemental Indentures Without Consent of Holders....................               54
   SECTION 9.02       Supplemental Indentures with Consent of Holders.......................               55
   SECTION 9.03       Execution of Supplemental Indentures..................................               57
   SECTION 9.04       Effect of Supplemental Indentures.....................................               57
   SECTION 9.05       Conformity with Trust Indenture Act...................................               57
   SECTION 9.06       Reference in Securities to Supplemental Indentures....................               57
</TABLE>

                                      iii

<PAGE>

<TABLE>
<S>                                                                                                        <C>
ARTICLE TEN - COVENANTS.....................................................................               57
   SECTION 10.01      Payment of Principal, Premium or Make-Whole Amount, if any;
                      Interest and Additional Amounts.......................................               57
   SECTION 10.02      Maintenance of Office or Agency.......................................               58
   SECTION 10.03      Money for Securities Payments to Be Held in Trust.....................               59
   SECTION 10.04      Existence.............................................................               60
   SECTION 10.05      Maintenance of Properties.............................................               61
   SECTION 10.06      Insurance.............................................................               61
   SECTION 10.07      Payment of Taxes and Other Claims.....................................               61
   SECTION 10.08      Provision of Financial Information....................................               61
   SECTION 10.09      Statement as to Compliance............................................               61
   SECTION 10.10      Additional Amounts....................................................               62
   SECTION 10.11      Waiver of Certain Covenants...........................................               62
   SECTION 10.12      Limitations on Incurrence of Debt.....................................               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..................................................               65
   SECTION 11.05      Deposit of Redemption Price...........................................               66
   SECTION 11.06      Securities Payable on Redemption Date.................................               67
   SECTION 11.07      Securities Redeemed in Part...........................................               67

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

ARTICLE THIRTEEN - REPAYMENT AT THE OPTION OF HOLDERS.......................................               69
   SECTION 13.01      Applicability of Article..............................................               69
   SECTION 13.02      Repayment of Securities...............................................               69
   SECTION 13.03      Exercise of Option....................................................               69
   SECTION 13.04      When Securities Presented for Repayment Become Due and Payable........               70
   SECTION 13.05      Securities Repaid in Part.............................................               71

ARTICLE FOURTEEN - DEFEASANCE AND COVENANT DEFEASANCE.......................................               71
   SECTION 14.01      Applicability of Article; Company's Option to Effect Defeasance or
                      Covenant Defeasance...................................................               71
   SECTION 14.02      Defeasance and Discharge..............................................               71
   SECTION 14.03      Covenant Defeasance...................................................               72
   SECTION 14.04      Conditions to Defeasance or Covenant Defeasance.......................               72
   SECTION 14.05      Deposited Money and Government Obligations to Be Held in Trust;
                      Other Miscellaneous Provisions........................................               74

ARTICLE FIFTEEN - MEETINGS OF HOLDERS OF SECURITIES.........................................               75
   SECTION 15.01      Purposes for Which Meetings May Be Called.............................               75
</TABLE>

                                       iv

<PAGE>

<TABLE>
<S>                                                                                                       <C>
   SECTION 15.02      Call, Notice and Place of Meetings....................................               75
   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...               77
   SECTION 15.06      Counting Votes and Recording Action of Meetings.......................               77

SIGNATURES AND SEALS........................................................................               79

ACKNOWLEDGMENT..............................................................................               80

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

EXHIBIT B
   FORMS OF CERTIFICATIONS..................................................................              B-1
</TABLE>

                                       v

<PAGE>

      INDENTURE, dated as of October 17, 2005, between AMERICAN CAMPUS
COMMUNITIES INC., a Maryland corporation (the "Company"), having its principal
office at 805 Las Cimas Parkway, Suite 400, Austin, Texas 78746, and J.P. MORGAN
TRUST COMPANY, NATIONAL ASSOCIATION, a national banking association, as trustee
hereunder (hereinafter called the "Trustee"), having a corporate trust office at
600 Travis, 11th Floor, Houston, Texas 77002.

                                    RECITALS

      WHEREAS, the Company deems it necessary and desirable to issue from time
to time for its lawful purposes senior debt securities (hereinafter called the
"Securities") evidencing its unsecured and unsubordinated 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;

      WHEREAS, this Indenture is subject to the provisions of the Trust
Indenture Act of 1939, as amended (the "Trust Indenture Act" or "TIA"), which
are deemed to be incorporated into this Indenture and shall, to the extent
applicable, be governed by such provisions; and

      WHEREAS, all things necessary to make this Indenture a valid 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 transaction" 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.

                                      A-1

<PAGE>

      "Acquired Debt" means Debt of a Person (i) existing at the time such
Person becomes a Subsidiary or (ii) assumed in connection with the acquisition
of assets from such Person, in each case, other than Debt incurred in connection
with, or in contemplation of, such Person becoming a Subsidiary or such
acquisition. Acquired Debt shall be deemed to be incurred on the date of the
related acquisition of assets from any Person or the date the acquired Person
becomes a Subsidiary.

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

      "Additional Amounts" means any additional amounts that are required by a
Security or by or pursuant to a Board Resolution, under circumstances specified
therein, to be paid by the Company in respect of certain taxes imposed on
certain Holders and which are owing to such Holders.

      "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.

      "Annual Service Charge" as of any date means the maximum amount that is
payable in any period for interest on, and original issue discount of, Debt of
the Company and its Subsidiaries plus the amount of dividends that are payable
in respect of any Disqualified Shares.

      "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 bearer.

      "Board of Directors" means the board of directors of the Company or any
committee of that board duly authorized to act hereunder.

      "Board Resolution" means a copy of a resolution certified by the Secretary
or an Assistant Secretary of the Company to have been duly adopted by the Board
of Directors and to be in full force and effect on the date of such
certification, and delivered to the Trustee.

                                      A-2

<PAGE>

      "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 not a day on
which banking institutions in that Place of Payment or particular location are
authorized or required by law, regulation or executive order to close. In
addition, if on that day a payment is to be made in (or a rate is to be
ascertained for) Euros, it means a day on which the Trans-European Automated
Real-Time Gross Settlement Express Transfer System ("TARGET") is open for
settlement of payment in Euros.

      "Clearstream" means Clearstream Banking, societe anonyme (formerly
Cedelbank), or its successor.

      "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 Shares" means, with respect to (i) the Company, its shares of
common stock, par value $0.01 per share, and (ii) any other Person, all shares
of capital stock or other equity securities or interests issued by such Person
other than Preferred Shares.

      "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 Request" and "Company Order" mean, respectively, a written
request or order signed in the name of the Company by its Chairman of the Board,
the President or a Vice President, and by its Treasurer, an Assistant Treasurer,
the Secretary or an Assistant Secretary, of the Company, and delivered to the
Trustee.

      "Consolidated Income Available for Debt Service" for any period means
Earnings from Operations of the Company and its Subsidiaries plus amounts that
have been deducted, and minus amounts that have been added, for the following
(without duplication): (i) interest on Debt of the Company and its Subsidiaries,
(ii) provision for taxes of the Company and its Subsidiaries based on income,
(iii) amortization of debt discount and deferred financing costs, (iv)
provisions for gains and losses on properties and property depreciation and
amortization, (v) the effect of any non-cash charge resulting from a change in
accounting principles in determining Earnings from Operations for such period,
and (vi) amortization of deferred charges.

      "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 or (ii) any currency unit (or
composite currency) 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 600 Travis, 11th Floor, Houston,
Texas 77002.

                                      A-3

<PAGE>

      "corporation" includes corporations, real estate investment trusts,
partnerships, limited liability companies, joint ventures, associations,
companies and business trusts.

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

      "Custodian" has the meaning specified in Section 5.01.

      "Debt" of the Company or any Subsidiary means, without duplication, any
indebtedness of the Company and or any Subsidiary, whether or not contingent, in
respect of (i) borrowed money or evidenced by bonds, notes, debentures or
similar instruments, (ii) borrowed money secured by any Encumbrance existing on
property owned by the Company or any Subsidiary, (iii) the reimbursement
obligations, contingent or otherwise, in connection with any letters of credit
actually issued (other than letters of credit issued to provide credit
enhancement or support with respect to other indebtedness of the Company or any
Subsidiary otherwise reflected as Debt hereunder) or amounts representing the
balance deferred and unpaid of the purchase price of any property or services,
except any such balance that constitutes an accrued expense or trade payable, or
all conditional sale obligations or obligations under any title retention
agreement, (iv) the principal amount of all obligations of the Company or any
Subsidiary with respect to redemption, repayment or other repurchase of any
Disqualified Shares, or (v) any lease of property by the Company or any
Subsidiary as lessee which is reflected on the Company's consolidated balance
sheet as a capitalized lease in accordance with GAAP, to the extent, in the case
of items of indebtedness under (i) through (iii) above, that any such items
(other than letters of credit) would appear as a liability on the Company's
consolidated balance sheet in accordance with GAAP, and also includes, to the
extent not otherwise included, any obligation by the Company or any Subsidiary
to be liable for, or to pay, as obligor, guarantor or otherwise (other than for
purposes of collection in the ordinary course of business), Debt of another
Person (other than the Company or any Subsidiary) (it being understood that Debt
shall be deemed to be incurred by the Company or any Subsidiary whenever the
Company or such subsidiary shall create, assume, guarantee or otherwise become
liable in respect thereof).

      "Defaulted Interest" has the meaning specified in Section 3.07.

      "Disqualified Shares" means, with respect to any Person, any Shares of
such Person which by the terms of such Shares (or by the terms of any security
into which they are convertible or for which they are exchangeable or
exercisable), upon the happening of any event or otherwise (i) mature or are
mandatorily redeemable, pursuant to a sinking fund obligation or otherwise
(other than Shares which are redeemable solely in exchange for Common Shares),
(ii) are convertible into or exchangeable or exercisable for Debt or
Disqualified Shares, or (iii) are redeemable at the option of the holder
thereof, in whole or in part (other than Shares which are redeemable solely in
exchange for Common Shares), in each case on or prior to the Stated Maturity of
the Securities.

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

                                      A-4

<PAGE>

      "Earnings from Operations" for any period means net earnings excluding
gains and losses on sales of investments, as reflected in the financial
statements of the Company and its Subsidiaries for such period determined on a
consolidated basis in accordance with GAAP.

      "Encumbrance" means any mortgage, lien, charge, pledge or security
interest of any kind.

      "Euro" or "(euro)" means the single currency of participating member
states of the European Union.

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

      "Event of Default" has the meaning specified in Section 5.01.

      "Exchange Act" means the Securities Exchange Act of 1934, as amended.

      "Foreign Currency" means any currency, currency unit or composite
currency, including, without limitation, the Euro, 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, as in effect from
time to time, as used in the United States applied on a consistent basis.

      "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 securities which are (i) 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 (ii) 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 shall also
include 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.

      "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.

                                      A-5

<PAGE>

      "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 not
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
that by its terms bears interest only after Maturity, shall mean interest
payable after Maturity, and, when used with respect to a Security that provides
for the payment of Additional Amounts pursuant to Section 10.10, includes such
Additional Amounts.

      "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 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.

      "Maturity," when used with respect to any Security, means the date on
which the principal of such Security or an installment of principal becomes due
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.

      "Officers' Certificate" means a certificate signed by the Chairman of the
Board of Directors, the President or a Vice President and by the Treasurer, an
Assistant Treasurer, the Secretary or an Assistant Secretary of the Company, 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 counsel for the Company
or other counsel and who shall be satisfactory to the Trustee.

                                      A-6

<PAGE>

      "Original Issue Discount Security" means any Security that provides for an
amount 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 of all series or one
or more series, as the context requires, 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;

            (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;

            (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; and

            (v) Securities converted into Common Shares or Preferred Shares
pursuant to or in accordance with this Indenture if the terms of such Securities
provide for convertibility pursuant to Section 3.01;

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

                                      A-7

<PAGE>

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 the Trustee 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.

      "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 or
Additional Amounts with respect to any Securities or coupons on behalf of the
Company.

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

      "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 or Additional Amounts with respect to
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 Shares" means, with respect to (i) the Company, all series of
its shares of preferred stock, par value $0.01 per share, and any other equity
securities or interests issued by the Company that are entitled to a preference
or priority over any other equity securities or interests of the Company with
respect to any distribution of the Company's income or assets, whether by
dividend or upon any voluntary or involuntary liquidation, dissolution or
winding up and (ii) any other Person, all capital stock or other equity
securities or interests issued by such Person that are entitled to a preference
or priority over any other capital stock or equity securities or interests
issued by such Person with respect to any distribution of such Person's income
or assets, whether by dividend or upon any voluntary or involuntary liquidation,
dissolution or winding up.

                                      A-8

<PAGE>

      "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 at which it is to be redeemed pursuant to this Indenture.

      "Registered Security" shall mean any Security that 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.

      "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
officer within the corporate trust department of the Trustee having direct
responsibility for the administration of this Indenture.

      "Security" 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.

      "Security Register" and "Security Registrar" have the respective meanings
specified in Section 3.05.

      "Shares" means any Common Shares or Preferred Shares.

      "Significant Subsidiary" means any Subsidiary that is a "significant
subsidiary" (as defined in Article I, Rule 1-02 of Regulation S-X, promulgated
under the Securities Act of 1933, as amended) of the Company.

      "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.

                                      A-9

<PAGE>

      "Subsidiary" means any corporation or other entity a majority of (i) the
voting power of the outstanding voting equity securities or interests or (ii)
the outstanding equity securities or interests of which are owned, directly or
indirectly, by the Company or by one or more other Subsidiaries of the Company.
For the purposes of this definition, "voting equity securities or interests"
means equity securities or interests having voting power for the election of
directors (or similar fiduciaries), whether at all times or only so long as no
senior class of equity securities has such voting power by reason of any
contingency.

      "Total Assets" as of any date means the sum of (i) the Undepreciated Real
Estate Assets and (ii) all other assets of the Company and its Subsidiaries
determined in accordance with GAAP (but excluding accounts receivable and
intangibles).

      "Total Unencumbered Assets" means the sum of (i) those Undepreciated Real
Estate Assets not subject to an Encumbrance and (ii) all other assets of the
Company and its Subsidiaries not subject to an Encumbrance determined in
accordance with GAAP (but excluding accounts receivable and intangibles).

      "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; provided, however, that in the event the
Trust Indenture Act of 1939 is amended after such date, "Trust Indenture Act"
means, to the extent required by any such amendment, the Trust Indenture Act of
1939 as so amended.

      "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.

      "Undepreciated Real Estate Assets" as of any date means the cost (original
cost plus capital improvements) of real estate assets of the Company and its
Subsidiaries on such date, before depreciation and amortization determined on a
consolidated basis in accordance with GAAP.

      "United States" means, unless otherwise specified with respect to any
Securities pursuant to Section 3.01, the United States of America (including the
50 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 any state
thereof or an estate or trust the income of which is subject to United States
Federal income taxation regardless of its source.

      "Unsecured Debt" means Debt that is not secured by an Encumbrance upon any
of the assets of the Company or any Subsidiary.

                                      A-10

<PAGE>

      "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 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 10.09) 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

                                      A-11

<PAGE>

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.

      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 that 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.

                                      A-12

<PAGE>

                  (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 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 that 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
document provided or permitted by this Indenture to be made upon, given or
furnished to, or filed with,

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

                                      A-13

<PAGE>

            (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 furnished in writing to the Trustee
by the Company, Attention: Chief Financial Officer (with a copy to the Company's
general counsel), or

            (3) either the Trustee or the Company, by the other party, 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 (713)
216-2431, phone number (713) 216-5651; and if to the Company at facsimile number
(512) 732-2450, phone number (512) 732-1000.

      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

                                      A-14

<PAGE>

Securities or the sufficiency of any notice to Holders of Registered Securities
given as provided herein.

      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 parties hereto shall bind their respective 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 invalid, illegal or unenforceable under
any current or future law, and if the rights or obligations of any of the
parties as a whole would not be materially affected thereby, such provision
shall be fully separable, and this Indenture shall be construed and enforced as
if such illegal, invalid or unenforceable provision had never comprised a part
thereof and the remaining provisions of this Indenture shall remain in full
force and effect and shall not be affected by the illegal, invalid or
unenforceable provision or by its severance therefrom. In lieu of such illegal,
invalid or unenforceable provision, there shall be added automatically as a part
of this Indenture a legal, valid and enforceable provision as similar in terms
and effect to such illegal, invalid or unenforceable provision as may be
possible, and the parties hereto request the court to whom disputes relating to
this Indenture or the Securities are submitted to reform the otherwise illegal,
invalid or unenforceable provision in accordance with this Section 1.09.

      SECTION 1.10 Benefits of Indenture. Nothing in this Indenture or in the
Securities or coupons, 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 law 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.

                                      A-15

<PAGE>

      SECTION 1.12 Legal Holidays. 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
convert or 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 or any Additional Amounts or principal (and premium or Make-Whole
Amount, if any) or conversion 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 conversion or exchange, provided that no interest shall accrue on
the amount so payable for the period from and after such Interest Payment Date,
Redemption Date, Repayment Date, sinking fund payment date, Stated Maturity or
Maturity or last day for conversion or exchange, as the case may be, if such
amount is so paid on the next succeeding Business Day.

      SECTION 1.13 Immunity of Stockholders, Directors, Officers and Agents of
the Company. No recourse under or upon any obligation, covenant or agreement
contained in this Indenture, or in any Security, or because of any indebtedness
evidenced thereby, shall be had against any past, present or future stockholder,
employee, officer or director, as such, of the Company or of any successor,
either directly or through the Company 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, all such liability being
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

                                      A-16

<PAGE>

rule or regulation of any securities exchange on which the Securities may be
listed, or to conform to usage.

      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.

                                            J.P. MORGAN TRUST COMPANY, NATIONAL
                                            ASSOCIATION, as Trustee

                                            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 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

                                      A-17

<PAGE>

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.

      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 on any Global Security in permanent
global form shall be made to the Person or Persons specified therein.

      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 a Person as the Holder of such principal amount of
Outstanding Securities represented by a permanent Global Security as shall be
specified in a written statement of the Holder of such permanent Global
Security.

      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 that may be authenticated and delivered under this
Indenture is unlimited.

      The Securities may be issued in one or more series. 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 or
determined in the manner provided, 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 (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);

                                      A-18

<PAGE>

            (3) the date or dates, or the method by which such date or dates
will be determined, on which the principal of the Securities of the series shall
be payable;

            (4) the rate or rates at which the Securities of the series shall
bear interest, if any, or the method by which such rate or rates shall be
determined, the date or dates from which such interest shall accrue or the
method by which such date or dates shall be determined, the Interest Payment
Dates on which such interest will be payable and the Regular Record Date, if
any, for the interest payable on any Registered Security on any Interest Payment
Date, or the method by which such date shall be determined, and the basis upon
which interest shall be calculated if other than that of a 360-day year of
twelve 30-day months;

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

            (6) the period or periods within which, the price or prices
(including the premium or Make-Whole Amount, if any) at which, the currency or
currencies, currency unit or units or composite currency or currencies in which,
and other terms and conditions upon which Securities of the series may be
redeemed, in whole or in part, at the option of the Company, if the Company is
to have the option;

            (7) the obligation, if any, of the Company to redeem, repay or
purchase Securities of the series pursuant to any sinking fund or analogous
provision or at the option of a Holder thereof, and the period or periods within
which or the date or dates on which, the price or prices at which, the currency
or currencies, currency unit or units or composite currency or currencies in
which, and other terms and conditions upon which Securities of the series shall
be redeemed, repaid or purchased, in whole or in part, pursuant to such
obligation;

            (8) if other than denominations of $1,000 and any integral multiple
thereof, the denominations in which any Registered Securities of the series
shall be issuable and, if other than denominations of $5,000, the denomination
or denominations in which any Bearer Securities of the series shall be issuable;

            (9) if other than the Trustee, the identity of each Security
Registrar and/or Paying Agent;

            (10) if other than the principal amount thereof, the portion of the
principal amount of Securities of the series that shall be payable upon
declaration of acceleration of the Maturity thereof pursuant to Section 5.02 or,
if applicable, the portion of the principal amount of Securities of the series
that is convertible in accordance with the provisions of this Indenture, or the
method by which such portion shall be determined;

            (11) if other than Dollars, the Foreign Currency or Currencies in
which payment of the principal of (and premium or Make-Whole Amount, if any) and
interest or Additional Amounts, if any, on the Securities of the series shall be
payable or in which the

                                      A-19

<PAGE>

Securities of the series shall be denominated and the manner of determining the
equivalent thereof in Dollars for purposes of the definition of "Outstanding" in
Section 1.01;

            (12) whether the amount of payments of principal of (and premium or
Make-Whole Amount, if any) or interest, if any, on the Securities of the series
may be determined with reference to an index, formula or other method (which
index, formula or method may be based, without limitation, on one or more
currencies, currency units, composite currencies, commodities, equity indices or
other indices), 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 or Additional Amounts, 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, or the applicability thereof, 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 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
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 occur, if other than in the manner provided in Section 3.05, and,
if Registered Securities of the series are to be issuable as a Global Security,
the identity of the depository for such series;

            (17) 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;

            (18) the Person to whom any interest on any Registered Security of
the series shall be payable, if other than the Person in whose name that
Security (or one or more

                                      A-20

<PAGE>

Predecessor Securities) is registered at the close of business on the Regular
Record Date for such interest, 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, any interest
payable on a temporary Global Security on an Interest Payment Date will be paid
if other than in the manner provided in Section 3.04;

            (19) the applicability, if any, of Sections 14.02 and/or 14.03 to
the Securities of the series and any provisions in modification of, in addition
to or in lieu of any of the provisions of Article Fourteen;

            (20) 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;

            (21) if the Securities of the series are to be issued upon the
exercise of warrants, the time, manner and place for such Securities to be
authenticated and delivered;

            (22) whether and under what circumstances the Company will pay
Additional Amounts as contemplated by Section 10.10 on the Securities of the
series to any Holder who is not a United States person (including any
modification to the definition of such term) in respect of any tax, assessment
or governmental charge and, if so, whether the Company will have the option to
redeem such Securities rather than pay such Additional Amounts (and the terms of
any such option);

            (23) the obligation, if any, of the Company to permit the conversion
of the Securities of such series into the Company's Common Shares or Preferred
Shares, as the case may be, and the terms and conditions upon which such
conversion shall be effected (including, without limitation, the initial
conversion price or rate, the conversion period, any adjustment of the
applicable conversion price and any requirements relative to the reservation of
such shares for purposes of conversion); and

            (24) 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 the Company and delivered to the Trustee

                                      A-21

<PAGE>

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
Registered Securities of such series, other than Registered Securities issued in
global form (which may be of any denomination), shall be issuable in
denominations of $1,000 and any integral multiple thereof and the Bearer
Securities of such series, other than Bearer Securities issued in global form
(which may be of any denomination), shall be issuable in a denomination of
$5,000.

      SECTION 3.03 Execution, Authentication, Delivery and Dating. The
Securities and any coupons appertaining thereto shall be executed on behalf of
the Company by its Chairman of the Board, its President, one of its Vice
Presidents, or its Treasurer or one of its Assistant Treasurers, 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 or coupons bearing the manual or facsimile signatures of
individuals who were at any time the proper officers of the Company 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, 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 the Trustee or 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 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 Bearer
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.

                                      A-22

<PAGE>

      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 Securities, the Trustee shall be entitled to receive, 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.

      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.

      The Trustee shall not be required to authenticate such Securities 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.

      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.

                                      A-23

<PAGE>

      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 duly executed by
the Trustee 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.

                  (b) 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), 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 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.

                  (c) Unless otherwise provided in or pursuant to a Board
Resolution, the following provisions of this Section 3.04(c) shall govern the
exchange of temporary Securities other than through the facilities of The
Depository Trust Company. If any such

                                      A-24

<PAGE>

temporary Security is issued in global form, then such temporary Global Security
shall, unless otherwise provided therein, be delivered to the London office of a
depository or common depository (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; provided,
however, that, unless otherwise specified in such temporary Global Security,
upon such presentation by the Common Depository, such temporary Global Security
is 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 outside
the United States.

                                      A-25

<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 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 in 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(c) 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 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.

      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 to be Security Registrar, it shall have the right to examine
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

                                      A-26

<PAGE>

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 that 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 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
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 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 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 that 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

                                      A-27

<PAGE>

paragraph. If the depository for any permanent Global Security is The Depository
Trust Company ("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 (x) 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, (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 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 before the opening of business at such office or agency on the related
proposed date for payment of Defaulted Interest, interest 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 in respect of
such portion of

                                      A-28

<PAGE>

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 to the Holder 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.

      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 therefor 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

                                      A-29

<PAGE>

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; provided, however, that payment of principal of (and premium or
Make-Whole Amount, if any), any interest on and any Additional Amounts with
respect to, 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 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 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 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

                                      A-30

<PAGE>

any Registered Security may at the Company's option be paid by (i) mailing a
check for such interest, 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) wire 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 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 (i) must be received by the Trustee, in immediately available
funds, by 11:00 a.m. New York time, on the Interest Payment Date, and (ii) 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, any interest 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:

            (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

                                      A-31

<PAGE>

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 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 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.

                                      A-32

<PAGE>

      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 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 conversion or for credit against any sinking fund
payment shall, if surrendered to any Person other than the Trustee, be delivered
to the Trustee (at the address below), and any such Securities and coupons and
Securities and coupons surrendered directly to the Trustee for any such purpose
shall be promptly canceled by it. The Company may at any time deliver to the
Trustee (at the address below) 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 canceled 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 (at the address below). No Securities shall be authenticated in
lieu of or in exchange for any Securities canceled as provided in this Section,
except as expressly permitted by this Indenture. Canceled Securities and coupons
held by the Trustee shall be retained by the Trustee in accordance with the
Trustee's document retention policy. Deliveries of all Securities to be canceled
should be made, by United States mail (preferably insured and certified) to J.P.
Morgan Trust Company, National Association, 600 Travis, 11th Floor, Houston,
Texas 77002.

                                      A-33

<PAGE>

      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.

                    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 any right to receive Additional Amounts, as provided
in Section 10.10), 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 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, and any Additional Amounts with respect

                                      A-34

<PAGE>

thereto, 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.

      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 any interest
and Additional Amounts 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 any interest on or any Additional
Amounts payable in respect of any Security of that series or of any coupon
appertaining thereto, when such interest, Additional Amounts or coupon 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, when and as
due by the terms of any Security of that series; or

                                      A-35

<PAGE>

            (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), 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) default under any bond, debenture, note, mortgage, indenture or
instrument under which there may be issued or by which there may be secured or
evidenced any indebtedness for money borrowed by the Company (or by any
Subsidiary, the repayment of which the Company has guaranteed or for which the
Company is directly responsible or liable as obligor or guarantor), having an
aggregate principal amount outstanding of at least $10,000,000, whether such
indebtedness now exists or shall hereafter be created, which default shall have
resulted in such indebtedness becoming or being declared due and payable prior
to the date on which it would otherwise have become due and payable, without
such indebtedness having been discharged, or such acceleration having been
rescinded or annulled, within a period of 30 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 25% in principal amount of
the Outstanding Securities of that series a written notice specifying such
default and requiring the Company to cause such indebtedness to be discharged or
cause such acceleration to be rescinded or annulled and stating that such notice
is a "Notice of Default" hereunder; provided, however, that such a default on
indebtedness which constitutes tax-exempt financing having an aggregate
principal amount outstanding not exceeding $25,000,000 that results solely from
a failure of an entity providing credit support for such indebtedness to honor a
demand for payment on a letter of credit shall not constitute an Event of
Default; or

            (6) the entry by a court of competent jurisdiction of one or more
judgments, orders or decrees against the Company or any of its Subsidiaries in
an aggregate amount (excluding amounts covered by insurance) in excess of
$10,000,000 and such judgments, orders or decrees remain undischarged, unstayed
and unsatisfied in an aggregate amount (excluding amounts covered by insurance)
in excess of $10,000,000 for a period of 30 consecutive days; or

            (7) the Company or any Significant Subsidiary pursuant to or within
the meaning of any Bankruptcy Law:

                  (A) commences a voluntary case,

                  (B) consents to the entry of an order for relief against it in
an involuntary case,

                  (C) consents to the appointment of a Custodian of it or for
all or substantially all of its property, or

                  (D) makes a general assignment for the benefit of its
creditors; or

                                      A-36

<PAGE>

            (8) a court of competent jurisdiction enters an order or decree
under any Bankruptcy Law that:

                  (A) is for relief against the Company or any Significant
Subsidiary in an involuntary case,

                  (B) appoints a Custodian of the Company or any Significant
Subsidiary or for all or substantially all of either of its property, or

                  (C) orders the liquidation of the Company or any Significant
Subsidiary, and the order or decree remains unstayed and in effect for 90 days;
or

            (9) 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.

      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 and any Additional
Amounts payable in respect of 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 thereon at the
rate or rates borne by or provided for in such Securities,

                                      A-37

<PAGE>

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

                  (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 on Securities of that series that 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 or
Additional Amounts, if any, on any Security of any series and any related coupon
when such interest or Additional Amount 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 and Additional Amounts, with
interest upon any overdue principal (and premium or Make-Whole Amount, if any)
and, to the extent that payment of such interest shall be legally enforceable,
upon any overdue installments of interest or Additional Amounts, if any, 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,

                                      A-38

<PAGE>

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, 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) 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 and Additional Amounts,
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

                                      A-39

<PAGE>

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.

      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 and any Additional Amounts, 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 and any Additional Amounts payable, 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),
interest and Additional Amounts, respectively; and

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

      The Trustee may fix a record date and payment date for any payment to
Holders pursuant to this Section 5.06. At least 15 days before such record date,
the Trustee shall mail to each Holder and the Company a notice that states the
record date, the payment date and the amount to be paid under this Section 5.06.

      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 security or
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

                                      A-40

<PAGE>

            (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.

      SECTION 5.08 Unconditional Right of Holders to Receive Principal, Premium
or Make-Whole Amount, if any, Interest and Additional Amounts. 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 on, and any Additional Amounts in respect of,
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.

                                      A-41

<PAGE>

      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

            (3) the Trustee need not take any action that 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 on or Additional Amounts payable in respect of 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.

      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

                                      A-42

<PAGE>

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,
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 payment of
the principal of (or premium or Make-Whole Amount, if any) or interest 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 on or any Additional Amounts with respect to any Security of
such series, or in the payment of any sinking fund installment with respect to
the Securities of such series, the Trustee shall be protected in withholding
such notice if and so long as 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 that 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 rely and shall be 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 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

                                      A-43

<PAGE>

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 and the written 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;

            (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 or, if paid by the Trustee, shall be repaid by the Holders upon
demand. 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;

            (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; and

            (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.

      The Trustee shall not be required 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, if it shall have
reasonable grounds for believing that repayment of such funds or adequate
indemnity against such risk or liability is not reasonably assured to it.

                                      A-44

<PAGE>

      Except during the continuance of an Event of Default, the Trustee
undertakes to perform 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.

      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, of the
Securities or coupons or of any offering document used in connection with
Securities, 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 and, within 30 days of
receiving a written request therefor, 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,
within 30 days of receiving a written request therefor, each of the Trustee and
any predecessor Trustee upon its request for all reasonable expenses,
disbursements and advances incurred or made 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, disbursement or advance as may be attributable to its negligence
or bad faith; and

            (3) to indemnify, within 30 days of receiving a written request
therefor, each of the Trustee and any predecessor Trustee for, and to hold it
harmless against, any loss, liability or expense incurred without negligence 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

                                      A-45

<PAGE>

expenses of defending itself against any claim or liability in connection with
the exercise or performance of any of its powers or duties hereunder.

      When the Trustee incurs expenses or renders services in connection with an
Event of Default specified in Section 5.01(7) or Section 5.01(8), 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 Federal or state bankruptcy, insolvency or
other similar 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 on particular Securities or any coupons.

      The provisions of this Section shall survive the termination of this
Indenture.

      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 a combined
capital and surplus of at least $15,000,000. If such corporation 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 such corporation 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 30 days after the giving of such notice of
resignation, the resigning Trustee may petition 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.

                                      A-46

<PAGE>

                  (d) If at any time:

                        (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
six 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 six 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 six 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 six 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.

                                      A-47

<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, subject
nevertheless to its claim, if any, provided for in Section 6.06.

                  (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.

                                      A-48

<PAGE>

                  (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.

      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 at least $15,000,000 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

                                      A-49

<PAGE>

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 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.

      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.

                                            J.P. MORGAN TRUST COMPANY, NATIONAL
                                            ASSOCIATION, as Trustee

                                            By:_________________________________
                                                       as Authenticating Agent

                                            By:_________________________________
                                                       Authorized Signatory

                                      A-50

<PAGE>

      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:

                        (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, if it shall have reasonable grounds for
believing that repayment of such funds or adequate indemnity against such risk
or liability is not reasonably assured to it.

                  (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.

                                      A-51

<PAGE>

       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.

            (1) Within 60 days after May 15 of each year commencing with the
first May 15 following the first issuance of Securities pursuant to Section
3.01, if contemplated by Section 313(a) of the TIA, the Trustee shall transmit,
in accordance with Section 313(c) of the TIA, a brief report dated as of such
May 15 with respect to any of the events specified in said Section 313(a) which
may have occurred since the later of the immediately preceding May 15 and the
date of this Indenture.

            (2) The Trustee shall transmit the reports referred to in Section
313(b) of the TIA at the time specified therein.

            (3) Reports pursuant to this Section shall be transmitted in the
manner and to the Persons contemplated by Sections 313(c) and 313(d) of the TIA.

      SECTION 7.03 Reports by Company. The Company will:

            (1) to the extent not otherwise submitted on the Commission's
Electronic Data Gathering, Analysis and Retrieval system (EDGAR), 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; and

                                      A-52

<PAGE>

            (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 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.

      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 or a state thereof 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 any interest (including all Additional Amounts,
if any, payable pursuant to Section 10.10) 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 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

                                      A-53

<PAGE>

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 herein and
in the Securities contained; 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 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

                                      A-54

<PAGE>

(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 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 by Sections 2.01 and 3.01, including the
provisions and procedures relating to Securities convertible into Common Shares
or Preferred Shares, as the case may be; 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.

      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,

                                      A-55

<PAGE>

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
on, any Security; or reduce the principal amount thereof or the rate or amount
of interest thereon or any Additional Amounts payable in respect thereof, or any
premium or Make-Whole Amount payable upon the redemption thereof, or change any
obligation of the Company to pay Additional Amounts pursuant to Section 10.10
(except as contemplated by Section 8.01(l) and permitted by Section 9.01(1)), 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 9.02, Section 5.13
or Section 10.11, 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 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.

                                      A-56

<PAGE>

      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 entitled to receive, and 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 Trust Indenture Act 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;
Interest and Additional Amounts. 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 on and any Additional Amounts payable in respect of 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, any
interest due on and any Additional Amounts payable in respect of Bearer
Securities on or before Maturity, other than Additional Amounts, if any, payable
as provided in Section 10.10 in respect of principal of (or premium or
Make-Whole Amount, if any, on) such a Security, 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, all payments of principal and interest may be paid by check to,
or by transfer to an account maintained by, the registered Holder of the
Registered Security or other person entitled thereto, which payments in the case
of principal shall be made against surrender of such Security.

                                      A-57

<PAGE>

      SECTION 10.02 Maintenance of Office or Agency. 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. 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); and with respect to Bearer Securities of any
series and subject to any laws or regulations applicable thereto, in a Place of
Payment for that series which is located outside the United States; (B) 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 securities exchange located outside the United
States and such securities 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) an office or agency where any Bearer
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 or Additional Amounts in respect of 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 (including any Additional
Amounts payable on Securities of such series pursuant to Section 10.10) 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, interest or Additional Amounts, 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.

                                      A-58

<PAGE>

      The Company may from time to time designate one or more other offices or
agencies 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 the office or agency of the Company in the Borough of Manhattan, The
City of New York, and initially appoints the Trustee at its office or agency in
such city as Paying Agent and as its agent to receive all such presentations,
surrenders, notices and demands.

      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.

      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 on
or Additional Amounts in respect of, 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 or Additional Amounts 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 on or
Additional Amounts in respect of, 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 or Additional Amounts, 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 or Additional Amounts 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

                                      A-59

<PAGE>

            (1) hold all sums held by it for the payment of principal of (and
premium or Make-Whole Amount, if any) or interest 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 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, 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 on, or any Additional Amounts in respect of, any Security of
any series and remaining unclaimed for two years after such principal (and
premium or Make-Whole Amount, if any), interest or Additional Amounts 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 Company shall
have sole responsibility for compliance with all applicable escheat laws; 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 on, or any Additional Amounts in respect
of, 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 corporate existence, all material rights (by articles of
incorporation, by-laws 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 and that the loss
is not disadvantageous in any material respect to the Holders.

                                      A-60

<PAGE>

      SECTION 10.05 Maintenance of Properties. The Company will, and will cause
all of its Subsidiaries to, cause all of its and their respective material
properties used or useful in the conduct of its and their respective businesses
to be maintained and kept in good condition, repair and working order and
supplied with all necessary equipment and will cause to be made all necessary
repairs, renewals, replacements, betterments and improvements thereof, 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 selling or otherwise disposing of their properties for value in the
ordinary course of business.

      SECTION 10.06 Insurance. The Company will maintain and cause each of its
Subsidiaries to maintain with insurers of recognized responsibility insurance
concerning its properties against such casualties and contingencies and of such
types and in such amounts as is customary for the same or similar businesses.

      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 Provision of Financial Information. Whether or not the
Company is subject to Section 13 or 15(d) of the Exchange Act, the Company will
prepare the annual reports, quarterly reports and other documents within 15 days
of each of the respective dates by which the Company would have been required to
file such annual reports, quarterly reports and other documents with the
Commission pursuant to such Section 13 or 15(d) and will (i) transmit by mail to
all Holders, as their names and addresses appear in the Security Register, upon
written request and without cost to such Holders copies of the annual reports,
quarterly reports and other documents which the Company would have been required
to file with the Commission pursuant to Section 13 or 15(d) of the Exchange Act
if the Company were subject to such Sections, and (ii) file with the Trustee
copies of the annual reports, quarterly reports and other documents which the
Company would have been required to file with the Commission pursuant to Section
13 or 15(d) of the Exchange Act if the Company were subject to such Sections and
(iii) promptly upon written request and payment of the reasonable cost of
duplication and delivery, supply copies of such documents to any prospective
Holder.

      SECTION 10.09 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 10.09, such compliance shall be determined without
regard to any period of grace or requirement of notice under this Indenture.

                                      A-61

<PAGE>

      SECTION 10.10 Additional Amounts. If any Securities of a series provide
for the payment of Additional Amounts, the Company will pay to the Holder of any
Security of such series or any coupon appertaining thereto Additional Amounts as
may be specified as contemplated by Section 3.01. Whenever in this Indenture
there is mentioned, in any context except in the case of Section 5.02(1), the
payment of the principal of or any premium or Make-Whole Amount or interest on,
or in respect of, any Security of any series or payment of any related coupon or
the net proceeds received on the sale or exchange of any Security of any series,
such mention shall be deemed to include mention of the payment of Additional
Amounts provided by the terms of such series established pursuant to Section
3.01 to the extent that, in such context, Additional Amounts are, were or would
be payable in respect thereof pursuant to such terms and express mention of the
payment of Additional Amounts (if applicable) in any provisions hereof shall not
be construed as excluding Additional Amounts in those provisions hereof where
such express mention is not made.

      Except as otherwise specified as contemplated by Section 3.01, if the
Securities of a series provide for the payment of Additional Amounts, at least
10 days prior to the first Interest Payment Date with respect to that series of
Securities (or if the Securities of that series will not bear interest prior to
Maturity, the first day on which a payment of principal and any premium or
Make-Whole Amount is made), and at least 10 days prior to each date of payment
of principal and any premium or Make-Whole Amount or interest if there has been
any change with respect to the matters set forth in the below-mentioned
Officers' Certificate, the Company will furnish the Trustee and the Company's
principal Paying Agent or Paying Agents, if other than the Trustee, with an
Officers' Certificate instructing the Trustee and such Paying Agent or Paying
Agents whether such payment of principal of and any premium or Make-Whole Amount
or interest on the Securities of that series shall be made to Holders of
Securities of that series or any related coupons who are not United States
persons without withholding for or on account of any tax, assessment or other
governmental charge described in the Securities of the series. If any such
withholding shall be required, then such Officers' Certificate shall specify by
country the amount, if any, required to be withheld on such payments to such
Holders of Securities of that series or related coupons and the Company will pay
to the Trustee or such Paying Agent the Additional Amounts required by the terms
of such Securities. In the event that the Trustee or any Paying Agent, as the
case may be, shall not so receive the above-mentioned certificate, then the
Trustee or such Paying Agent shall be entitled (i) to assume that no such
withholding or deduction is required with respect to any payment of principal or
interest with respect to any Securities of a series or related coupons until it
shall have received a certificate advising otherwise and (ii) to make all
payments of principal and interest with respect to the Securities of a series or
related coupons without withholding or deductions until otherwise advised. The
Company covenants to indemnify the Trustee and any Paying Agent for, and to hold
them harmless against, any loss, liability or expense reasonably incurred
without negligence or bad faith on their part arising out of or in connection
with actions taken or omitted by any of them or in reliance on any Officers'
Certificate furnished pursuant to this Section or in reliance on the Company's
not furnishing such an Officers' Certificate.

      SECTION 10.11 Waiver of Certain Covenants. The Company may omit in any
particular instance to comply with (1) any term, provision or condition set
forth in Sections 10.04 to 10.08, inclusive, or (2) any other covenant
applicable to the Securities of any series pursuant to Section 3.01 which other
covenant (i) does not expressly provide to the contrary and (ii) is not

                                      A-62

<PAGE>

of the kind which could not be amended without the consent of the Holder of each
Outstanding Security of such series pursuant to Section 9.02, 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 term, provision, condition or covenant, but no such waiver shall extend to
or affect such term, provision, condition or covenant except to the 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, condition or covenant shall remain in full force and effect.

      SECTION 10.12 Limitations on Incurrence of Debt.

                  (a) If so provided with respect to any series of Securities,
the Company will not, and will not permit any Subsidiary to, incur any Debt if,
immediately after giving effect to the incurrence of such additional Debt and
the application of the proceeds thereof, the aggregate principal amount of all
outstanding Debt of the Company and its Subsidiaries on a consolidated basis
determined in accordance with GAAP is greater than 65% of the sum of (without
duplication) (i) the Total Assets of the Company and its Subsidiaries as of the
end of the calendar quarter covered in the Company's Annual Report on Form 10-K
or Quarterly Report on Form 10-Q, as the case may be, most recently filed with
the Commission (or, if such filing is not permitted under the Exchange Act, with
the Trustee) prior to the incurrence of such additional Debt and (ii) the
purchase price of any real estate assets or mortgages receivable acquired, and
the amount of any securities offering proceeds received (to the extent that such
proceeds were not used to acquire real estate assets or mortgages receivable or
used to reduce Debt), by the Company or any Subsidiary since the end of such
calendar quarter, including those proceeds obtained in connection with the
incurrence of such additional Debt.

                  (b) If so provided with respect to any series of Securities,
in addition to the limitations set forth in Subsection (a) of this Section
10.12, the Company will not, and will not permit any Subsidiary to, incur any
Debt secured by any Encumbrance upon any of the assets of the Company or any
Subsidiary if, immediately after giving effect to the incurrence of such
additional Debt and the application of the proceeds thereof, the aggregate
principal amount of all outstanding Debt of the Company and its Subsidiaries on
a consolidated basis which is secured by any Encumbrance is greater than 55% of
the sum of (without duplication) (i) the Total Assets of the Company and its
Subsidiaries as of the end of the calendar quarter covered in the Company's
Annual Report on Form 10-K or Quarterly Report on Form 10-Q, as the case may be,
most recently filed with the Commission (or, if such filing is not permitted
under the Exchange Act, with the Trustee) prior to the incurrence of such
additional Debt and (ii) the purchase price of any real estate assets or
mortgages receivable acquired, and the amount of any securities offering
proceeds received (to the extent that such proceeds were not used to acquire
real estate assets or mortgages receivable or used to reduce Debt), by the
Company or any Subsidiary since the end of such calendar quarter, including
those proceeds obtained in connection with the incurrence of such additional
Debt.

                  (c) If so provided with respect to any series of Securities,
in addition to the limitations set forth in Subsection (a) and (b) of this
Section 10.12, the Company and its

                                      A-63
<PAGE>
Subsidiaries may not at any time own Total Unencumbered Assets equal to less
than 150% of the aggregate outstanding principal amount of the Unsecured Debt of
the Company and its Subsidiaries on a consolidated basis.

            (d) If so provided with respect to any series of Securities, in
addition to the limitations set forth in Subsection (a), (b) and (c) of this
Section 10.12, the Company will not, and will not permit any Subsidiary to,
incur any Debt if the ratio of Consolidated Income Available for Debt Service to
the Annual Service Charge for the four consecutive fiscal quarters most recently
ended prior to the date on which such additional Debt is to be incurred shall
have been less than 1.5:1 on a pro forma basis after giving effect thereto and
to the application of the proceeds therefrom and calculated on the assumption
that (i) such Debt and any other Debt incurred by the Company and its
Subsidiaries since the first day of such four-quarter period and the application
of the proceeds therefrom, including to refinance other Debt, had occurred at
the beginning of such period; (ii) the repayment or retirement of any other Debt
by the Company and its Subsidiaries since the first day of each such
four-quarter period had been repaid or retired at the beginning of such period
(except that, in making such computation, the amount of Debt under any revolving
credit facility shall be computed based upon the average daily balance of such
Debt during such period); (iii) in the case of Acquired Debt or Debt incurred in
connection with any acquisition since the first day of such four-quarter period,
the related acquisition had occurred as of the first day of such period with the
appropriate adjustments with respect to such acquisition being included in such
pro forma calculation; and (iv) in the case of any acquisition or disposition by
the Company or its Subsidiaries of any asset or group of assets since the first
day of such four-quarter period, whether by merger, stock purchase or sale, or
asset purchase or sale, such acquisition or disposition or any related repayment
of Debt had occurred as of the first day of such period with the appropriate
adjustments with respect to such acquisition or disposition being included in
such pro forma calculation.

                    ARTICLE ELEVEN - REDEMPTION OF SECURITIES

      SECTION 11.01 Applicability of Article. Securities of any series that 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

                                      A-64
<PAGE>

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.

      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, and Additional Amounts, 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

                                      A-65
<PAGE>

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, or for conversion,

            (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,

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

            (11)  that Securities of the series called for redemption and all
unmatured coupons, if any, relating thereto, must be surrendered to the Paying
Agent as a condition of payment of the Redemption Price.

      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 written request
provided to the Trustee not less than 45 days nor more than 60 days prior to the
Redemption Date, 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.

      If any Securities called for redemption are converted, any money deposited
with the Trustee or with any Paying Agent or so segregated and held in trust for
the redemption of such Security shall be paid to the Company upon Company
Request or, if then held by the Company, shall be discharged from such trust.

                                      A-66
<PAGE>

      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) 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 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, except as otherwise provided with
respect to Securities convertible into Common Shares or Preferred Shares,
installments of interest 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 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, having the same

                                      A-67
<PAGE>

form, terms and Stated Maturity, in 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 having the same form, terms and Stated Maturity 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 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

                                      A-68
<PAGE>

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 prior to 11:00 a.m. New York time on 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 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

                                      A-69
<PAGE>

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 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 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

                                      A-70
<PAGE>

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, having the same form, terms and Stated Maturity,
in 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 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)

                                      A-71
<PAGE>

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 3.04, 3.05, 3.06, 10.02 and 10.03 and with respect to
the payment of Additional Amounts, if any, on such Securities as contemplated by
Section 10.10, (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 10.08, 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 10.08, 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) or 501(9) 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:

            (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 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

                                      A-72
<PAGE>

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, 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 shall occur as a result of such deposit or, insofar as
Sections 5.01(7) and 5.01(8) 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.

            (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

                                      A-73
<PAGE>

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.

      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 and Additional Amounts, 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
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, the Trustee
shall deliver or pay to the Company from time to time upon Company Request any
money or Government

                                      A-74
<PAGE>

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 10% 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 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

                                      A-75
<PAGE>

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
five 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.

      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.

                                      A-76
<PAGE>

      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.

            (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 two 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

                                      A-77
<PAGE>

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.

                                      A-78
<PAGE>

                                   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.

                                              AMERICAN CAMPUS COMMUNITIES, INC.

                                              By: /s/ William C. Bayless
                                                  ------------------------------
                                                  William C. Bayless
                                                  President

                                              J.P. MORGAN TRUST COMPANY,NATIONAL
                                              ASSOCIATION, as Trustee

                                              By: /s/ Mary Jane Henson
                                                  ------------------------------
                                                  Mary Jane Henson
                                                  Vice President

                                      A-79
<PAGE>

                                    EXHIBIT A
              FORM OF REDEEMABLE OR NON-REDEEMABLE SENIOR 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 ("DTC"), 55 Water Street, New York, New York to the
issuer or its agent for registration of transfer, exchange or payment, and such
Security issued is registered in the name of CEDE & CO., or such other name as
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, since 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.]

                        AMERICAN CAMPUS COMMUNITIES, INC.

                             [Designation of Series]

                                                         [CUSIP/ISIN___________]

No. _______                                                             $_______

AMERICAN CAMPUS COMMUNITIES, INC., a Maryland corporation (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-80
<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-81
<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, on which banks in
__________________ are not required or authorized by law 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:_____________________                AMERICAN CAMPUS COMMUNITIES, INC.

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

Attest:

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

                     TRUSTEE'S CERTIFICATE OF AUTHENTICATION

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

                                          J.P. MORGAN TRUST COMPANY, NATIONAL
                                          ASSOCIATION, as Trustee

                                          By: __________________________________
                                               Authorized Signatory

                                      A-82
<PAGE>

                              [Reverse of Security]

                        AMERICAN CAMPUS COMMUNITIES, INC.

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 October 17, 2005 (herein called the "Indenture")
between the Company and J.P. Morgan Trust Company, National Association, a
national banking association, 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 that 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.

      Year           Redemption Price          Year          Redemption Price

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 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

                                      A-83
<PAGE>

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,

              Redemption Price for Redemption    Redemption Price for Redemption
                  Through Operation of                Otherwise Than Through
  Year              the Sinking Fund              Operation of the Sinking Fund

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.

[If applicable, insert conversion provisions set forth in any Board Resolution
or indenture supplemental to the Indenture.]

      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

                                      A-84
<PAGE>

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.

      [If applicable, insert -- 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 to the holder hereof 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,

      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 recourse shall be had for 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, or based on or in respect of the
Indenture or any indenture supplemental thereto,

                                      A-85
<PAGE>

against any past, present or future stockholder, employee, officer or director,
as such, of the Company or of any successor, either directly or through the
Company or any successor, whether by virtue of any constitution, statute or rule
of law or by the enforcement of any assessment or penalty or otherwise, all such
liability being, by the acceptance hereof and as part of the consideration for
the issue hereof, expressly waived and released.

         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-86
<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
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 United States
financial institution hereby agrees, on its own behalf or through its agent,
that you may advise American Campus Communities, Inc. 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 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.

                                      B-1
<PAGE>

      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 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 American Campus Communities, Inc. 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]

                             By:________________________________________________

                                      B-4