Document:

<PAGE>   1
                                                                   EXHIBIT 10.10

                                                        Conformed Execution Copy

                       FIRST AMENDMENT TO CREDIT AGREEMENT

         THIS FIRST AMENDMENT TO CREDIT AGREEMENT dated as of February 23, 2001
(the "First Amendment"), is made and entered into by and among SHAMROCK
LOGISTICS OPERATIONS, L.P., a Delaware limited partnership (the "Borrower"), THE
CHASE MANHATTAN BANK, as administrative agent (the "Administrative Agent"),
ROYAL BANK OF CANADA, as syndication agent (the "Syndication Agent"), SUNTRUST
BANK, as documentation agent (the "Documentation Agent"), and the financial
institutions (collectively, the "Lenders") parties to the Credit Agreement (as
hereinafter defined).

                                    RECITALS

         WHEREAS, the Borrower entered into the Credit Agreement, dated as of
December 15, 2000, among the Borrower, the Administrative Agent, the Syndication
Agent, the Documentation Agent, and the Lenders parties thereto (the "Credit
Agreement");

         WHEREAS, the Borrower has requested that the Lenders consent to the
extension of the early termination of the commitments as contemplated in the
last paragraph of Section 4.01 of the Credit Agreement;

         WHEREAS, the parties hereto have agreed, on the terms and conditions
herein set forth, to the amendments and agreements contained herein;

         NOW, THEREFORE, IT IS AGREED:

         Section 1. Definitions. Capitalized terms used but not otherwise
defined herein shall have the meaning assigned such terms in the Credit
Agreement.

         Section 2. Amendments to Credit Agreement.

         (a) Section 1.01 of the Credit Agreement hereby is amended by inserting
the following definitions in the appropriate alphabetical order:

                  "First Amendment" means that certain First Amendment to Credit
         Agreement, dated as of February 23, 2001, among the Borrower, the
         Lenders party thereto, the Administrative Agent, the Syndication Agent,
         and the Documentation Agent.

         (b) The definition of "Agreement" appearing in Section 1.01 of the
Credit Agreement hereby is amended to read in its entirety as follows:

                  "Agreement" means this Credit Agreement dated as of December
         15, 2000, among the Borrower, the Lenders, the Administrative Agent,
         the Syndication Agent, and the Documentation Agent, as amended by the
         First Amendment, as the same may be amended, waived or otherwise
         modified from time to time in accordance herewith.

                                       1
<PAGE>   2
         (c) Section 4.01 of the Credit Agreement hereby is amended by deleting
the words and numbers "February 28," where they appear in the last paragraph of
such section and replacing such words and numbers with "May 31."

         Section 3. Conditions Precedent to Effectiveness. This First Amendment
shall become effective as of the date hereof when the Administrative Agent shall
have received counterparts hereof duly executed by the Borrower, each Lender,
the Administrative Agent, the Syndication Agent and the Documentation Agent (or,
in the case of any party as to which an executed counterpart shall not have been
received, telegraphic or other written confirmation from such party of the
execution of a counterpart hereof by such party).

         Section 4. Reaffirmation of Representations and Warranties. To induce
the Lenders, the Administrative Agent, the Syndication Agent and the
Documentation Agent to enter into this First Amendment, the Borrower hereby
reaffirms, as of the date hereof, its representations and warranties in their
entirety contained in Article III of the Credit Agreement and all other Loan
Documents executed pursuant thereto (except to the extent such representations
and warranties relate solely to an earlier specified date) and additionally
represents and warrants as follows:

         (a) The execution, delivery and performance by the Borrower of this
First Amendment are within the Borrower's limited partnership powers, have been
duly authorized by all necessary partnership action of the Borrower, require, in
respect of the Borrower, no action by or in respect of, or filing with, any
governmental body, agency or official and do not contravene or constitute a
default under, any provision of law or regulation (including Regulation X issued
by the Federal Reserve Board) applicable to the Borrower or Regulation U or the
certificate of formation of the Borrower or the Partnership Agreement (Borrower)
or any judgment, injunction, order, decree or material agreement binding upon
the Borrower or result in or require the creation or imposition of any Lien on
any asset of the Borrower.

         (b) This First Amendment has been duly executed and delivered by the
Borrower. This First Amendment, the Credit Agreement as amended by this First
Amendment are legal, valid and binding obligations of the Borrower, enforceable
against the Borrower in accordance with their respective terms, except as the
enforceability thereof may be limited by any applicable bankruptcy, insolvency,
reorganization, moratorium or similar laws affecting creditors' rights generally
and by general principles of equity.

         (c) No Event of Default has occurred and is continuing as of the date
hereof.

         Section 5. Adoption, Ratification and Confirmation of Loan Documents.
Each of the Borrower, the Administrative Agent and the Lenders does hereby
adopt, ratify and confirm the Loan Documents, as amended, modified or waived
hereby, and acknowledges and agrees that the Loan Documents, as amended,
modified or waived hereby, are and remain in full force and effect.

         Section 6. Governing Law; Entire Agreement. This First Amendment shall
be governed by, and construed in accordance with, the laws of the State of New
York.

         Section 7. Descriptive Headings, etc. The descriptive headings of the
several Sections of this First Amendment are inserted for convenience only and
shall not be deemed to affect the meaning or construction of any of the
provisions hereof.

                                       2
<PAGE>   3
         Section 8. Counterparts. This First Amendment may be executed in any
number of counterparts and by different parties on separate counterparts and all
of such counterparts shall together constitute one and the same instrument.

         Section 9. Successors and Assigns. This First Amendment shall be
binding upon and inure to the benefit of the parties hereto and the Lenders and
their respective successors and assigns.

         IN WITNESS WHEREOF, the parties hereto have caused this First Amendment
to be duly executed and delivered by their respective duly authorized officers
as the date first above written.

                                        BORROWER:

                                        SHAMROCK LOGISTICS OPERATIONS, L.P.

                                        By: Riverwalk Logistics, L.P.,
                                            its General Partner

                                            By: Shamrock Logistics GP, LLC,
                                                its General Partner

                                                By:   /s/ Steven Blank
                                                   -----------------------------
                                                   Name:  Steven Blank
                                                   Title: Chief Accounting
                                                          and Financial Officer

                              [Signature Page - 1]

<PAGE>   4
                                        AGENTS AND LENDERS:

                                        THE CHASE MANHATTAN BANK,
                                        individually and as Administration Agent

                                        By    /s/ Steve Nordaker
                                           -------------------------------------
                                           Name:  Steve A. Nordaker
                                           Title: Managing Director

                              [Signature Page - 2]

<PAGE>   5
                                        ROYAL BANK OF CANADA,
                                        individually and as Syndication Agent

                                        By:   /s/ Jason York
                                           -------------------------------------
                                           Name:  Jason York
                                           Title: Manager

                              [Signature Page - 3]

<PAGE>   6
                                        SUNTRUST BANK,
                                        individually and as Documentation Agent

                                        By:   /s/ Steven J. Newby
                                           -------------------------------------
                                           Name:  Steven J. Newby
                                           Title: Vice President

                              [Signature Page - 4]
<PAGE>   7
                                        THE SUMITOMO BANK, LIMITED

                                        By:  /s/ C. Michael Garrido
                                           -------------------------------------
                                           Name:  C. Michael Garrido
                                           Title: Senior Vice President

                              [Signature Page - 5]
<PAGE>   8
                                        THE INDUSTRIAL BANK OF JAPAN, LIMITED
                                        NEW YORK BRANCH

                                        By:   /s/ Michael Oakes
                                           -------------------------------------
                                           Name:  Michael N. Oakes
                                           Title: Senior Vice President,
                                                  Houston Office

                              [Signature Page - 6]

<PAGE>   9
                                        THE BANK OF TOKYO-MITSUBISHI, LTD.

                                        By:   /s/ K. Glasscock
                                           -------------------------------------
                                           Name:  K. Glasscock
                                           Title: VP & Manager

                              [Signature Page - 7]

<PAGE>   10
                                        THE FUJI BANK, LIMITED

                                        By:   /s/ Toru Maeda
                                           -------------------------------------
                                           Name:  Toru Maeda
                                           Title: General Manager

                              [Signature Page - 8]<PAGE>   1
                                                                     EXHIBIT 4.1

                          Newfield Exploration Company,
                                    as Issuer

                                       TO

                           First Union National Bank,
                                   as Trustee

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

                                SENIOR INDENTURE

                          Dated as of February 28, 2001

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

<PAGE>   2

                          NEWFIELD EXPLORATION COMPANY

    CERTAIN SECTIONS OF THIS INDENTURE RELATING TO SECTIONS 310 THROUGH 318,
                 INCLUSIVE, OF THE TRUST INDENTURE ACT OF 1939:

<TABLE>
<CAPTION>
TRUST INDENTURE
  ACT SECTION                                                                      INDENTURE SECTION
<S>                                                                                <C>
   Section 310(a)(1).............................................................  609
              (a)(2)     ........................................................  609
              (a)(3)     ........................................................  Not Applicable
              (a)(4)     ........................................................  Not Applicable
              (b)        ........................................................  608
                                                                                   610
   Section 311(a)        ........................................................  613
              (b)        ........................................................  613
   Section 312(a)        ........................................................  701
                                                                                   702
              (b)        ........................................................  702
              (c)        ........................................................  702
   Section 313(a)        ........................................................  703
              (b)        ........................................................  703
              (c)        ........................................................  703
              (d)        ........................................................  703
   Section 314(a)        ........................................................  704
              (a)(4)     ........................................................  101
                                                                                   1004
              (b)        ........................................................  Not Applicable
              (c)(1)     ........................................................  102
              (c)(2)     ........................................................  102
              (c)(3)     ........................................................  Not Applicable
              (d)        ........................................................  Not Applicable
              (e)        ........................................................  102
   Section 315(a)        ........................................................  601
              (b)        ........................................................  602
              (c)        ........................................................  601
              (d)        ........................................................  601
              (e)        ........................................................  514
   Section 316(a)        ........................................................  101
              (a)(1)(A)  ........................................................  502
                                                                                   512
              (a)(1)(B)  ........................................................  513
              (a)(2)     ........................................................  Not Applicable
              (b)        ........................................................  508
              (c)        ........................................................  104
   Section 317(a)(1)     ........................................................  503
              (a)(2)     ........................................................  504
              (b)        ........................................................  1003
   Section 318(a)        ........................................................  107
</TABLE>

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

<PAGE>   3

                                TABLE OF CONTENTS

                             RECITALS OF THE COMPANY

<TABLE>
<S>                                                                                                             <C>
                                                      ARTICLE ONE
                                DEFINITIONS AND OTHER PROVISIONS OF GENERAL APPLICATION

     SECTION 101.  Definitions....................................................................................1
     SECTION 102.  Compliance Certificates and Opinions...........................................................6
     SECTION 103.  Form of Documents Delivered to Trustee.........................................................7
     SECTION 104.  Acts of Holders; Record Dates..................................................................7
     SECTION 105.  Notices, Etc., to Trustee and Company..........................................................9
     SECTION 106.  Notice to Holders; Waiver......................................................................9
     SECTION 107.  Conflict with Trust Indenture Ac...............................................................9
     SECTION 108.  Effect of Headings and Table of Contents......................................................10
     SECTION 109.  Successors and Assigns........................................................................10
     SECTION 110.  Separability Clause...........................................................................10
     SECTION 111.  Benefits of Indenture.........................................................................10
     SECTION 112.  Governing Law.................................................................................10
     SECTION 113.  Legal Holidays................................................................................10

                                                      ARTICLE TWO
                                                    SECURITY FORMS

     SECTION 201.  Forms Generally...............................................................................11
     SECTION 202.  Form of Trustee's Certificate of Authentication...............................................11

                                                      ARTICLE THREE
                                                     THE SECURITIES

     SECTION 301.  Amount Unlimited; Issuable in Series..........................................................11
     SECTION 302.  Denominations.................................................................................14
     SECTION 303.  Execution, Authentication, Delivery and Dating................................................14
     SECTION 304.  Temporary Securities..........................................................................15
     SECTION 305.  Registration, Registration of Transfer and Exchange...........................................16
     SECTION 306.  Mutilated, Destroyed, Lost and Stolen Securities..............................................17
     SECTION 307.  Payment of Interest; Interest Rights Preserved................................................18
     SECTION 308.  Persons Deemed Owners.........................................................................19
     SECTION 309.  Cancellation..................................................................................19
     SECTION 310.  Computation of Interest.......................................................................19

                                                      ARTICLE FOUR
                                              SATISFACTION AND DISCHARGE

     SECTION 401.  Satisfaction and Discharge of Indenture.......................................................19
     SECTION 402.  Application of Trust Money....................................................................20

                                                      ARTICLE FIVE
                                                        REMEDIES
     SECTION 501.  Events of Default.............................................................................21
     SECTION 502.  Acceleration of Maturity; Rescission and Annulment............................................22
     SECTION 503.  Collection of Indebtedness and Suits for Enforcement by Trustee...............................23
     SECTION 504.  Trustee May File Proofs of Claim..............................................................24
     SECTION 505.  Trustee May Enforce Claims Without Possession of Securities...................................24
</TABLE>

                                       i
<PAGE>   4
<TABLE>
<S>                                                                                                             <C>
     SECTION 506.  Application of Money Collected................................................................24
     SECTION 507.  Limitation on Suits...........................................................................25
     SECTION 508.  Unconditional Right of Holders to Receive Principal, Premium and Interest.....................25
     SECTION 509.  Restoration of Rights and Remedies............................................................25
     SECTION 510.  Rights and Remedies Cumulative................................................................26
     SECTION 511.  Delay or Omission Not Waiver..................................................................26
     SECTION 512.  Control by Holders............................................................................26
     SECTION 513.  Waiver of Past Defaults.......................................................................26
     SECTION 514.  Undertaking for Costs.........................................................................27
     SECTION 515.  Waiver of Usury, Stay or Extension Laws.......................................................27

                                                      ARTICLE SIX
                                                      THE TRUSTEE

     SECTION 601.  Certain Duties and Responsibilities...........................................................27
     SECTION 602.  Notice of Defaults............................................................................27
     SECTION 603.  Certain Rights of Trustee.....................................................................28
     SECTION 604.  Not Responsible for Recitals or Issuance of Securities........................................28
     SECTION 605.  May Hold Securities...........................................................................29
     SECTION 606.  Money Held in Trust...........................................................................29
     SECTION 607.  Compensation and Reimbursement................................................................29
     SECTION 608.  Conflicting Interests.........................................................................29
     SECTION 609.  Corporate Trustee Required; Eligibility.......................................................30
     SECTION 610.  Resignation and Removal; Appointment of Successor.............................................30
     SECTION 611.  Acceptance of Appointment by Successor........................................................31
     SECTION 612.  Merger, Conversion, Consolidation or Succession to Business...................................32
     SECTION 613.  Preferential Collection of Claims Against Company.............................................32
     SECTION 614.  Appointment of Authenticating Agent...........................................................33

                                                      ARTICLE SEVEN
                                    HOLDERS' LISTS AND REPORTS BY TRUSTEE AND COMPANY

     SECTION 701.  Company to Furnish Trustee Names and Addresses of Holders.....................................34
     SECTION 702.  Preservation of Information; Communications to Holders........................................34
     SECTION 703.  Reports by Trustee............................................................................35
     SECTION 704.  Reports by Company............................................................................35

                                                      ARTICLE EIGHT
                                    CONSOLIDATION, MERGER, CONVEYANCE, TRANSFER OR LEASE

     SECTION 801.  Company May Consolidate, Etc., Only on Certain Terms..........................................35
     SECTION 802.  Successor Substituted.........................................................................36

                                                      ARTICLE NINE
                                                SUPPLEMENTAL INDENTURES

     SECTION 901.  Supplemental Indentures Without Consent of Holders............................................36
     SECTION 902.  Supplemental Indentures With Consent of Holders...............................................37
     SECTION 903.  Execution of Supplemental Indentures..........................................................38
     SECTION 904.  Effect of Supplemental Indentures.............................................................39
     SECTION 905.  Conformity with Trust Indenture Act...........................................................39
     SECTION 906.  Reference in Securities to Supplemental Indentures............................................39
</TABLE>

                                       ii
<PAGE>   5

<TABLE>
<S>                                                                                                             <C>
                                                      ARTICLE TEN
                                                       COVENANTS

     SECTION 1001.  Payment of Principal, Premium and Interest...................................................39
     SECTION 1002.  Maintenance of Office or Agency..............................................................39
     SECTION 1003.  Money for Securities Payments to Be Held in Trust............................................40
     SECTION 1004.  Statement by Officers as to Default..........................................................41
     SECTION 1005.  Existence....................................................................................41
     SECTION 1006.  Maintenance of Properties....................................................................41
     SECTION 1007.  Payment of Taxes and Other Claims............................................................42
     SECTION 1009.  Waiver of Certain Covenants..................................................................42

                                                      ARTICLE ELEVEN
                                                REDEMPTION OF SECURITIES

     SECTION 1101.  Applicability of Article.....................................................................42
     SECTION 1102.  Election to Redeem; Notice to Trustee........................................................42
     SECTION 1103.  Selection by Trustee of Securities to Be Redeemed............................................43
     SECTION 1104.  Notice of Redemption.........................................................................43
     SECTION 1105.  Deposit of Redemption Price..................................................................44
     SECTION 1106.  Securities Payable on Redemption Date........................................................44
     SECTION 1107.  Securities Redeemed in Part..................................................................44

                                                      ARTICLE TWELVE
                                                      SINKING FUNDS

     SECTION 1201.  Applicability of Article.....................................................................45
     SECTION 1202.  Satisfaction of Sinking Fund Payments with Securities........................................45
     SECTION 1203.  Redemption of Securities for Sinking Fund....................................................45

                                                      ARTICLE THIRTEEN
                                             DEFEASANCE AND COVENANT DEFEASANCE

     SECTION 1301.  Company's Option to Effect Defeasance or Covenant Defeasance.................................46
     SECTION 1302.  Defeasance and Discharge.....................................................................46
     SECTION 1303.  Covenant Defeasance..........................................................................46
     SECTION 1304.  Conditions to Defeasance or Covenant Defeasance..............................................47
     SECTION 1305.  Deposited Money and U.S. Government Obligations to be  Held in Trust;
                      Miscellaneous Provisions...................................................................48
     SECTION 1306.  Reinstatement................................................................................49
</TABLE>

                                      iii

<PAGE>   6

                  INDENTURE, dated as of February 28, 2001, between Newfield
Exploration Company, a corporation duly organized and existing under the laws of
the State of Delaware (herein called the "Company"), having its principal office
at 363 N. Sam Houston Parkway E., Suite 2020, Houston, Texas, 77060 and First
Union National Bank, a national banking association duly organized and existing
under the laws of the United States of America, as Trustee (herein called the
"Trustee").

                             RECITALS OF THE COMPANY

                  The Company has duly authorized the execution and delivery of
this Indenture to provide for the issuance from time to time of its unsecured
debentures, notes or other evidences of indebtedness (herein called
"Securities"), to be issued in one or more series as in this Indenture provided.

                  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
Securities by the Holders thereof, it is mutually agreed, for the equal and
proportionate benefit of all Holders of Securities or of series thereof, as
follows:

                                   ARTICLE ONE

                        DEFINITIONS AND OTHER PROVISIONS
                             OF GENERAL APPLICATION

SECTION 101.  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 Trust
         Indenture Act, either directly or by reference therein, have the
         meanings assigned to them therein;

                  (3) all accounting terms not otherwise defined herein have the
         meanings assigned to them in accordance with generally accepted
         accounting principles, and, except as otherwise herein expressly
         provided, the term "generally accepted accounting principles" with
         respect to any computation required or permitted hereunder shall mean
         such accounting principles as are generally accepted in the United
         States of America as of the date of such computation ("GAAP");

                  (4) unless the context otherwise requires, any reference to an
         "Article" or a "Section" refers to an Article or a Section, as the case
         may be, of this Indenture; and

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

<PAGE>   7

                  "Act," when used with respect to any Holder, has the meaning
specified in Section 104.

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

                  "Authenticating Agent" means any Person authorized by the
Trustee pursuant to Section 614 to act on behalf of the Trustee to authenticate
Securities of one or more series.

                  "Bankruptcy Law" means Title 11, U.S. Code or any similar
federal or state law for the relief of debtors.

                  "Board of Directors" means either the board of directors of
the Company or any committee of that board duly authorized to act for it in
respect hereof.

                  "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.

                  "Business Day," when used with respect to any Place of
Payment, means each Monday, Tuesday, Wednesday, Thursday and Friday which is not
a day on which banking institutions in that Place of Payment are authorized or
obligated by law or executive order to close.

                  "Commission" means the Securities and Exchange Commission, as
from time to time constituted, created under the Exchange Act, or, if at any
time after the 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 at such time.

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

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

                  "Corporate Trust Office" means the principal office of the
Trustee at which at any particular time its corporate trust business shall be
administered, which office shall be located at 5847 San Felipe, Suite 1050,
Houston, Texas 77057 or such other address as the Trustee may give notice
thereof to the Company.

                  "Covenant Defeasance" has the meaning specified in Section
1303.

                  "Custodian" means any receiver, trustee, assignee, liquidator
or similar official under any Bankruptcy Law.

                  "Defaulted Interest" has the meaning specified in Section 307.

                                       2
<PAGE>   8

                  "Defeasance" has the meaning specified in Section 1302.

                  "Depositary" means, with respect to Securities of any series
issuable in whole or in part in the form of one or more Global Securities, a
clearing agency registered under the Exchange Act that is designated to act as
Depositary for such Securities as contemplated by Section 301.

                  "Event of Default" has the meaning specified in Section 501.

                  "Exchange Act" means the Securities Exchange Act of 1934 and
any statute successor thereto, in each case as amended from time to time.

                  "Expiration Date" has the meaning specified in Section 104.

                  "GAAP" has the meaning specified in Section 101(3).

                  "Global Security" means a Security that evidences all or part
of the Securities of any series and bears such legend as may be specified as
contemplated by Section 301 for such Securities.

                  "Holder" means a Person in whose name a Security is registered
in the Security Register.

                  "Indenture" means this instrument as originally executed and
as it may from time to time be supplemented or amended by one or more indentures
supplemental hereto entered into pursuant to the applicable provisions hereof,
including, for all purposes of this instrument and any such supplemental
indenture, the provisions of the Trust Indenture Act that are deemed to be a
part of and govern this instrument and any such supplemental indenture,
respectively. The term "Indenture" shall also include the terms of particular
series of Securities established as contemplated by Section 301.

                  "interest," when used with respect to an Original Issue
Discount Security that by its terms bears interest only after Maturity, means
interest payable after Maturity.

                  "Interest Payment Date", when used with respect to any
Security, means the Stated Maturity of an installment of interest on such
Security.

                  "Investment Company Act" means the Investment Company Act of
1940 and any statute successor thereto, in each case as amended from time to
time.

                  "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, call for redemption or otherwise.

                  "Notice of Default" means a written notice of the kind
specified in Section 501(4).

                  "Officers' Certificate" means a certificate signed by the
Chief Executive Officer, 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. One of the officers signing an
Officers' Certificate given pursuant to Section 1004 shall be the principal
executive, financial or accounting officer of the Company.

                                       3
<PAGE>   9

                  "Opinion of Counsel" means a written opinion of counsel, who
may be counsel for the Company and who shall be acceptable to the Trustee.

                  "Original Issue Discount Security" means any Security which
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 502.

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

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

                           (2) Securities for whose payment or redemption 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; provided 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;

                           (3) Securities as to which Defeasance has been
         effected pursuant to Section 1302; and

                           (4) Securities that have been paid pursuant to
         Section 306 or in exchange for or in lieu of which other Securities
         have been authenticated and delivered pursuant to this Indenture, other
         than any such Securities in respect of which there shall have been
         presented to the Trustee proof satisfactory to it that such Securities
         are held by a bona fide purchaser in whose hands such Securities are
         valid obligations of the Company;

provided, however, that in determining whether the Holders of the requisite
principal amount of the Outstanding Securities have given, made or taken any
request, demand, authorization, direction, notice, consent, waiver or other
action hereunder as of any date, (A) the principal amount of an Original Issue
Discount Security which shall be deemed to be Outstanding shall be the amount of
the principal thereof that would be due and payable as of such date upon
acceleration of the Maturity thereof to such date pursuant to Section 502, (B)
if, as of such date, the principal amount payable at the Stated Maturity of a
Security is not determinable, the principal amount of such Security that shall
be deemed to be Outstanding shall be the amount as specified or determined as
contemplated by Section 301, (C) the principal amount of a Security denominated
in one or more foreign currencies or currency units that shall be deemed to be
Outstanding shall be the U.S. dollar equivalent, determined as of such date in
the manner provided as contemplated by Section 301, of the principal amount of
such Security (or, in the case of a Security described in Clause (A) or (B)
above, of the amount determined as provided in such Clause), and (D) 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 relying upon any such request, demand, authorization, direction,
notice, consent, waiver or other action, only Securities that the Trustee knows
to be so owned shall be so disregarded. Securities so owned that 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.

                                       4
<PAGE>   10

                  "Paying Agent" means any Person authorized by the Company to
pay the principal of or any premium or interest on any Securities on behalf of
the Company.

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

                  "Place of Payment," when used with respect to the Securities
of any series, means the place or places where the principal of and any premium
and interest on the Securities of that series are payable as specified as
contemplated by Section 301.

                  "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 306 in exchange for or in
lieu of a mutilated, destroyed, lost or stolen Security shall be deemed to
evidence the same debt as the mutilated, destroyed, lost or stolen Security.

                  "Redemption Date," when used with respect to any Security to
be redeemed, 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.

                  "Regular Record Date" for the interest payable on any Interest
Payment Date on the Securities of any series means the date specified for that
purpose as contemplated by Section 301.

                  "Restricted Subsidiary" means any Subsidiary the principal
business of which is carried on in, or the majority of the operating assets of
which are located in, the United States of America (including areas subject to
its jurisdiction).

                  "Securities" has the meaning stated in the first recital of
this Indenture and more particularly means any Securities authenticated and
delivered under this Indenture.

                  "Securities Act" means the Securities Act of 1933 and any
statute successor thereto, in each case as amended from time to time.

                  "Security Register" and "Security Registrar" have the
respective meanings specified in Section 305.

                  "Special Record Date" for the payment of any Defaulted
Interest means a date fixed by the Trustee pursuant to Section 307.

                  "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 as the fixed date on which the principal of such
Security or such installment of principal or interest is due and payable.

                  "Subsidiary" means any corporation, partnership, limited
liability company, business trust, association or other business entity of which
more than 50% of the total voting power of the equity interests entitled
(without regard to the occurrence of any contingency) to vote in the election of
directors, managers, trustees or other governing body thereof or any partnership
of which more than 50% of the partners' equity interests (considering all
partners' equity interests as a single class) is, in each case, owned or
controlled, directly or indirectly, by the Company or one or more of the other
Subsidiaries of the Company or any combination thereof.

                                       5
<PAGE>   11

                  "Trust Indenture Act" means the Trust Indenture Act of 1939 as
in force at the date as of which this instrument was executed; 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 instrument 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, and
if at any time there is more than one such Person, "Trustee" as used with
respect to the Securities of any series shall mean the Trustee with respect to
the Securities of that series.

                  "U.S. Government Obligation" has the meaning specified in
Section 1304.

                  "Vice President," when used with respect to the Company or the
Trustee, means any vice president, whether or not designated by a number or a
word or words added before or after the title "vice president."

SECTION 102.  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 such certificates and opinions as may be required under
the Trust Indenture Act. Each such certificate or opinion shall be given in the
form of an Officers' Certificate, if to be given by an officer of the Company,
or an Opinion of Counsel, if to be given by counsel, and shall comply with the
requirements of the Trust Indenture Act and any other requirements set forth in
this Indenture.

                  Every certificate or opinion with respect to compliance with a
condition or covenant provided for in this Indenture shall include:

                           (1) a statement that each individual signing such
         certificate or opinion has read such covenant or condition 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 covenant or condition 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.

                                       6
<PAGE>   12

SECTION 103.  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 a certificate or opinion of,
or representations by, counsel, unless such officer knows, or in the exercise of
reasonable care should know, that the certificate or opinion or representations
with respect to the matters upon which his certificate or opinion is based are
erroneous. Any such certificate or opinion of counsel 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 with respect to such factual matters is in the possession of the
Company, unless such counsel knows, or in the exercise of reasonable care should
know, that the certificate or opinion or representations with respect to such
matters are erroneous.

                  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 104.  Acts of Holders; Record Dates.

                  Any request, demand, authorization, direction, notice,
consent, waiver or other action provided or permitted by this Indenture to be
given, made or taken by Holders may be embodied in and evidenced by one or more
instruments of substantially similar tenor signed by such Holders in person or
by agent duly appointed in writing; and, except as herein otherwise expressly
provided, such action shall become effective when such instrument or instruments
are delivered to the Trustee and, where it is hereby expressly required, to the
Company. Such instrument or instruments (and the action embodied therein and
evidenced thereby) are herein sometimes referred to as the "Act" of the Holders
signing such instrument or instruments. Proof of execution of any such
instrument or of a writing appointing any such agent shall be sufficient for any
purpose of this Indenture and (subject to Section 601) conclusive in favor of
the Trustee and the Company, if made in the manner provided in this Section.

                  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 manner which the Trustee deems sufficient.

                  The ownership of Securities shall be proved by the Security
Register.

                  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

                                       7
<PAGE>   13

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 or the Company in reliance thereon, whether or not
notation of such action is made upon such Security.

                  The Company may set any day as a record date for the purpose
of determining the Holders of Outstanding Securities of any series entitled to
give, make or take any request, demand, authorization, direction, notice,
consent, waiver or other action provided or permitted by this Indenture to be
given, made or taken by Holders of Securities of such series, provided that the
Company may not set a record date for, and the provisions of this paragraph
shall not apply with respect to, the giving or making of any notice,
declaration, request or direction referred to in the next paragraph. If any
record date is set pursuant to this paragraph, the Holders of Outstanding
Securities of the relevant series on such record date, and no other Holders,
shall be entitled to take the relevant action, whether or not such Holders
remain Holders after such record date; provided that no such action shall be
effective hereunder unless taken on or prior to the applicable Expiration Date
by Holders of the requisite principal amount of Outstanding Securities of such
series on such record date. Nothing in this paragraph shall be construed to
prevent the Company from setting a new record date for any action for which a
record date has previously been set pursuant to this paragraph (whereupon the
record date previously set shall automatically and with no action by any Person
be canceled and of no effect), and nothing in this paragraph shall be construed
to render ineffective any action taken by Holders of the requisite principal
amount of Outstanding Securities of the relevant series on the date such action
is taken. Promptly after any record date is set pursuant to this paragraph, the
Company, at its own expense, shall cause notice of such record date, the
proposed action by Holders and the applicable Expiration Date to be given to the
Trustee in writing and to each Holder of Securities of the relevant series in
the manner set forth in Section 106.

                  The Trustee may set any day as a record date for the purpose
of determining the Holders of Outstanding Securities of any series entitled to
join in the giving or making of (i) any Notice of Default, (ii) any declaration
of acceleration referred to in Section 502, (iii) any request to institute
proceedings referred to in Section 507(2) or (iv) any direction referred to in
Section 512, in each case with respect to Securities of such series. If any
record date is set pursuant to this paragraph, the Holders of Outstanding
Securities of such series on such record date, and no other Holders, shall be
entitled to join in such notice, declaration, request or direction, whether or
not such Holders remain Holders after such record date; provided that no such
action shall be effective hereunder unless taken on or prior to the applicable
Expiration Date by Holders of the requisite principal amount of Outstanding
Securities of such series on such record date. Nothing in this paragraph shall
be construed to prevent the Trustee from setting a new record date for any
action for which a record date has previously been set pursuant to this
paragraph (whereupon the record date previously set shall automatically and with
no action by any Person be cancelled and of no effect), and nothing in this
paragraph shall be construed to render ineffective any action taken by Holders
of the requisite principal amount of Outstanding Securities of the relevant
series on the date such action is taken. Promptly after any record date is set
pursuant to this paragraph, the Trustee, at the Company's expense, shall cause
notice of such record date, the proposed action by Holders and the applicable
Expiration Date to be given to the Company in writing and to each Holder of
Securities of the relevant series in the manner set forth in Section 106.

                  With respect to any record date set pursuant to this Section,
the party hereto which sets such record date may designate any day as the
"Expiration Date" and from time to time may change the Expiration Date to any
earlier or later day; provided that no such change shall be effective unless
notice of the proposed new Expiration Date is given to the other party hereto in
writing, and to each Holder of Securities of the relevant series in the manner
set forth in Section 106, on or prior to the existing Expiration Date. If an
Expiration Date is not designated with respect to any record date set pursuant
to this Section, the party hereto which set such record date shall be deemed to
have initially designated the 180th day after such record date as the Expiration
Date with respect thereto, subject to its right to change

                                       8
<PAGE>   14

the Expiration Date as provided in this paragraph. Notwithstanding the
foregoing, no Expiration Date shall be later than the 180th day after the
applicable record date.

                  Without limiting the foregoing, a Holder entitled hereunder to
take any action hereunder with regard to any particular Security may do so with
regard to all or any part of the principal amount of such Security or by one or
more duly appointed agents each of which may do so pursuant to such appointment
with regard to all or any part of such principal amount.

SECTION 105.  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 any Holder or by the Company shall
         be sufficient for every purpose hereunder if made, given, furnished or
         filed in writing to or with the Trustee at its Corporate Trust Office;
         or

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

SECTION 106.  Notice to Holders; Waiver.

                  Where this Indenture provides for notice to Holders of any
event, such notice shall be sufficiently given (unless otherwise herein
expressly provided) if in writing and mailed, first-class postage prepaid, to
each 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 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. 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. .........In case by reason of the suspension of regular mail service or
by reason of any other cause it shall be impracticable to give such notice by
mail, then such notification as shall be made with the approval of the Trustee
shall constitute a sufficient notification for every purpose hereunder.

SECTION 107.  Conflict with Trust Indenture Act.

                  If any provision hereof limits, qualifies or conflicts with a
provision of the Trust Indenture Act which is required under such Act to be a
part of and govern this Indenture, the latter provision shall control. If any
provision of this Indenture modifies or excludes any provision of the Trust
Indenture Act which 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.

                                       9
<PAGE>   15

SECTION 108.  Effect of Headings and Table of Contents.

                  The Article and Section headings herein and the Table of
Contents are for convenience only and shall not affect the construction hereof.

SECTION 109.  Successors and Assigns.

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

SECTION 110.  Separability Clause.

                  In case any provision in this Indenture or the Securities
shall be invalid, illegal or unenforceable, the validity, legality and
enforceability of the remaining provisions shall not in any way be affected or
impaired thereby.

SECTION 111.  Benefits of Indenture.

                  Nothing in this Indenture or the Securities, express or
implied, shall give to any Person, other than the parties hereto and their
successors hereunder and the Holders, any benefit or any legal or equitable
right, remedy or claim under this Indenture.

SECTION 112.  Governing Law.

                  This Indenture and the Securities shall be governed by and
construed in accordance with the law of the State of New York.

SECTION 113.  Legal Holidays.

                  In any case where any Interest Payment Date, Redemption Date,
purchase date or Stated Maturity of any Security shall not be a Business Day at
any Place of Payment, then (notwithstanding any other provision of this
Indenture or of the Securities (other than a provision of any Security which
specifically states that such provision shall apply in lieu of this Section))
payment of interest or principal (and premium, if any) need not be made at such
Place of Payment on such date, but 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 or purchase date, or at the Stated
Maturity.

                                       10
<PAGE>   16

                                  ARTICLE TWO

                                 SECURITY FORMS

SECTION 201.  Forms Generally.

                  The Securities of each series shall be in substantially the
form established by or pursuant to a Board Resolution or in one or more
indentures supplemental hereto, in each case with such appropriate insertions,
omissions, substitutions and other variations as are required or permitted by
this Indenture, and may have such letters, numbers or other marks of
identification and such legends or endorsements placed thereon as may be
required or appropriate to comply with any law, with the rules of any securities
exchange or Depositary therefor or as may, consistently herewith, be determined
by the officers executing such Securities, as evidenced by their execution
thereof. A copy of an appropriate record of such establishment shall be
certified by the Secretary or an Assistant Secretary of the Company and
delivered to the Trustee at or prior to the delivery of the Company Order
contemplated by Section 303 for the authentication and delivery of such
Securities.

                  The definitive Securities shall be printed, lithographed or
engraved on steel engraved borders or may be produced in any other manner, all
as determined by the officers executing such Securities, as evidenced by their
execution of such Securities.

SECTION 202.  Form of Trustee's Certificate of Authentication.

                  The Trustee's certificates 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.

                                       First Union National Bank,
                                             As Trustee

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

                                  ARTICLE THREE

                                 THE SECURITIES

SECTION 301.  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 or pursuant to a Board Resolution and, subject to
Section 303, 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,

                                       11
<PAGE>   17

                           (1) the title of the Securities of the series (which
         shall distinguish the Securities of the series from Securities of any
         other series);

                           (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 304, 305, 306, 906
         or 1107 and except for any Securities which, pursuant to Section 303,
         are deemed never to have been authenticated and delivered hereunder);

                           (3) the Person to whom any interest on a Security of
         the series shall be payable, if other than the Person in whose name
         that Security (or one or more Predecessor Securities) is registered at
         the close of business on the Regular Record Date for such interest;

                           (4) the date or dates on which the principal of any
         Securities of the series is payable;

                           (5) the rate or rates at which any 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 any such
         interest shall accrue, the Interest Payment Dates on which any such
         interest shall be payable and the Regular Record Date for any such
         interest payable on any Interest Payment Date;

                           (6) the place or places where the principal of and
         any premium and interest on any Securities of the series shall be
         payable;

                           (7) the period or periods within which, the price or
         prices at which and the terms and conditions upon which any Securities
         of the series may be redeemed, in whole or in part, at the option of
         the Company and, if other than by a Board Resolution, the manner in
         which any election by the Company to redeem the Securities shall be
         evidenced;

                           (8) the obligation, if any, of the Company to redeem,
         purchase or repay any Securities of the series pursuant to any
         mandatory redemption, sinking fund or analogous provisions or at the
         option of the Holder thereof and the period or periods within which,
         the price or prices at which and the terms and conditions upon which
         any Securities of the series shall be redeemed, purchased or repaid, in
         whole or in part, pursuant to such obligation;

                           (9) if other than denominations of $1,000 and any
         integral multiple thereof, the denominations in which any Securities of
         the series shall be issuable;

                           (10) if the amount of principal of or any premium or
         interest on any Securities of the series may be determined with
         reference to an index or pursuant to a formula, the manner in which
         such amounts shall be determined;

                           (11) if other than the currency of the United States
         of America, the currency, currencies or currency units in which the
         principal of or any premium or interest on any Securities of the series
         shall be payable and the manner of determining the equivalent thereof
         in the currency of the United States of America for any purpose,
         including for purposes of the definition of "Outstanding" in Section
         101;

                           (12) if the principal of or any premium or interest
         on any Securities of the series is to be payable, at the election of
         the Company or the Holder thereof, in one or more

                                       12
<PAGE>   18

         currencies or currency units other than that or those in which such
         Securities are stated to be payable, the currency, currencies or
         currency units in which the principal of or any premium or interest on
         such Securities as to which such election is made shall be payable, the
         periods within which and the terms and conditions upon which such
         election is to be made and the amount so payable (or the manner in
         which such amount shall be determined);

                           (13) if other than the entire principal amount
         thereof, the portion of the principal amount of any Securities of the
         series which shall be payable upon declaration of acceleration of the
         Maturity thereof pursuant to Section 502;

                           (14) if the principal amount payable at the Stated
         Maturity of any Securities of the series will not be determinable as of
         any one or more dates prior to the Stated Maturity, the amount which
         shall be deemed to be the principal amount of such Securities as of any
         such date for any purpose thereunder or hereunder, including the
         principal amount thereof which shall be due and payable upon any
         Maturity other than the Stated Maturity or which shall be deemed to be
         Outstanding as of any date prior to the Stated Maturity (or, in any
         such case, the manner in which such amount deemed to be the principal
         amount shall be determined);

                           (15) if applicable, that the Securities of the
         series, in whole or any specified part, shall be defeasible pursuant to
         Section 1302 or Section 1303 or both such Sections; if other than by a
         Board Resolution, the manner in which any election by the Company to
         defease such Securities shall be evidenced, any additional means of
         defeasance and any additional conditions or limitations to defeasance
         with respect to Securities of the series pursuant to Article Thirteen
         or any modifications of or deletions from such conditions or
         limitations;

                           (16) if applicable, that any Securities of the series
         shall be issuable in whole or in part in the form of one or more Global
         Securities and, in such case, the respective Depositories for such
         Global Securities, the form of any legend or legends that shall be
         borne by any such Global Security and any circumstances in addition to
         or in lieu of those set forth in Clause (2) of the last paragraph of
         Section 305 in which any such Global Security may be exchanged in whole
         or in part for Securities registered, and any transfer of such Global
         Security in whole or in part may be registered, in the name or names of
         Persons other than the Depositary for such Global Security or a nominee
         thereof;

                           (17) any addition to or change in the Events of
         Default that apply to any Securities of the series and any change in
         the right of the Trustee or the requisite Holders of such Securities to
         declare the principal amount thereof due and payable pursuant to
         Section 502;

                           (18) any addition to or change in the covenants set
         forth in Article Ten that applies to Securities of the series; and

                           (19) any other terms of the series (which terms shall
         not be inconsistent with the provisions of this Indenture, except as
         permitted by Section 901(5)).

                  All Securities of any one series shall be substantially
identical except as to denomination and except as may otherwise be provided in
or pursuant to the Board Resolution referred to above and (subject to Section
303) set forth, or determined in the manner provided, in the Officers'
Certificate referred to above or in any such indenture supplemental hereto.

                  If any of the terms of the series are established by action
taken pursuant to a Board Resolution, a copy of an appropriate record of such
action shall be certified by the Secretary or an

                                       13
<PAGE>   19

Assistant Secretary of the Company and delivered to the Trustee at or prior to
the delivery of the Officers' Certificate setting forth the terms of the series.

SECTION 302.  Denominations.

                  The Securities of each series shall be issuable only in
registered form without coupons and only in such denominations as shall be
specified as contemplated by Section 301. In the absence of any such specified
denomination with respect to the Securities of any series, the Securities of
such series shall be issuable in denominations of $1,000 and any integral
multiple thereof.

SECTION 303.  Execution, Authentication, Delivery and Dating.

                  The Securities shall be executed on behalf of the Company by
its Chief Executive Officer, its President, its Treasurer or one of its Vice
Presidents or Assistant Treasurers, attested by its Secretary or one of its
Assistant Secretaries. The signature of any of these officers on the Securities
may be manual or facsimile.

                  Securities 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.

                  At any time and from time to time after the execution and
delivery Of this Indenture, the Company may deliver Securities of any series
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. If the form or terms of the Securities of the series have been
established by or pursuant to one or more Board Resolutions as permitted by
Sections 201 and 301, 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 Section 601) shall be
fully protected in relying upon, an Opinion of Counsel stating,

                           (1) if the form of such Securities has been
         established by or pursuant to Board Resolution as permitted by Section
         201, that such form has been established in conformity with the
         provisions of this Indenture;

                           (2) if the terms of such Securities have been
         established by or pursuant to Board Resolution as permitted by Section
         301, that such terms have been established in conformity with the
         provisions of this Indenture; and

                           (3) that such Securities, when authenticated and
         delivered by the Trustee and issued by the Company in the manner and
         subject to any conditions specified in such Opinion of Counsel, will
         constitute valid and legally binding obligations of the Company,
         enforceable in accordance with their terms, subject to bankruptcy,
         insolvency, fraudulent transfer, reorganization, moratorium and similar
         laws of general applicability relating to or affecting creditors'
         rights and to general equity principles.

If such form or terms have been so established, 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,

                                       14
<PAGE>   20

duties or immunities under the Securities and this Indenture or otherwise in a
manner that is not reasonably acceptable to the Trustee.

                  Notwithstanding the provisions of Section 301 and of the
preceding paragraph, if all Securities of a series are not to be originally
issued at one time, it shall not be necessary to deliver the Officers'
Certificate otherwise required pursuant to Section 301 or the Company Order and
Opinion of Counsel otherwise required pursuant to such preceding paragraph at or
prior to the authentication of each Security of such series if such documents
are delivered at or prior to the authentication upon original issuance of the
first Security of such series to be issued.

                  Each Security shall be dated the date of its authentication.

                  No Security shall be entitled to any benefit under this
Indenture or be valid or obligatory for any purpose unless there appears on such
Security a certificate of authentication substantially in the form provided for
herein executed by the Trustee by manual signature, and such certificate upon
any Security shall be conclusive evidence, and the only evidence, that such
Security has been duly authenticated and delivered hereunder. Notwithstanding
the foregoing, if any 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
309, 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 304.  Temporary Securities.

                  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 that 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 and with such appropriate insertions, omissions, substitutions and
other variations as the officers executing such Securities may determine, as
evidenced by their execution of such Securities.

                  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, the Company shall execute
and the Trustee shall authenticate and deliver in exchange therefor one or more
definitive Securities of the same series, of any authorized denominations and of
like tenor and aggregate principal amount. 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 and tenor.

                                       15
<PAGE>   21

SECTION 305.  Registration, Registration of Transfer and Exchange.

                  The Company shall cause to be kept at the Corporate Trust
Office of the Trustee a register (the register maintained in such office and in
any other office or agency of the Company in a Place of Payment being herein
sometimes collectively referred to as the "Security Register") in which, subject
to such reasonable regulations as it may prescribe, the Company shall provide
for the registration of Securities and of transfers of Securities. The Trustee
is hereby appointed "Security Registrar" for the purpose of registering
Securities and transfers of Securities as herein provided.

                  Upon surrender for registration of transfer of any Security of
a series at the 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 Securities of the same series, of any authorized denominations and of like
tenor and aggregate principal amount.

                  At the option of the Holder, Securities of any series may be
exchanged for other Securities of the same series, of any authorized
denominations and of like tenor and aggregate principal amount, upon surrender
of the Securities to be exchanged at such office or agency. 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.

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

                  No service charge shall be made for any registration of
transfer or exchange of Securities, but the Company may require payment of a sum
sufficient to cover any tax or other governmental charge that may be imposed in
connection with any registration of transfer or exchange of Securities, other
than exchanges pursuant to Section 304, 906 or 1107 not involving any transfer.

                  If the Securities of any series (or of any series and
specified tenor) are to be redeemed in part, the Company shall not be required
(A) to issue, register the transfer of or exchange any Securities of that series
(or of that series and specified tenor, as the case may be) during a period
beginning at the opening of business 15 days before the day of the mailing of a
notice of redemption of any such Securities selected for redemption under
Section 1103 and ending at the close of business on the day of such mailing, or
(B) to register the transfer of or exchange any Security so selected for
redemption in whole or in part, except the unredeemed portion of any Security
being redeemed in part.

                  The provisions of Clauses (1), (2), (3) and (4) below shall
apply only to Global Securities:

                           (1) Each Global Security authenticated under this
         Indenture shall be registered in the name of the Depositary designated
         for such Global Security or a nominee thereof and delivered to such
         Depositary or a nominee thereof or custodian therefor, and each such
         Global Security shall constitute a single Security for all purposes of
         this Indenture.

                                       16
<PAGE>   22

                           (2) Notwithstanding any other provision in this
         Indenture, no Global Security may be exchanged in whole or in part for
         Securities registered, and no transfer of a Global Security in whole or
         in part may be registered, in the name of any Person other than the
         Depositary for such Global Security or a nominee thereof unless (A)
         such Depositary (i) has notified the Company that it is unwilling or
         unable to continue as Depositary for such Global Security or (ii) has
         ceased to be a clearing agency registered under the Exchange Act, (B)
         there shall have occurred and be continuing an Event of Default with
         respect to such Global Security or (C) there shall exist such
         circumstances, if any, in addition to or in lieu of the foregoing as
         have been specified for this purpose as contemplated by Section 301.

                           (3) Subject to Clause (2) above, any exchange of a
         Global Security for other Securities may be made in whole or in part,
         and all Securities issued in exchange for a Global Security or any
         portion thereof shall be registered in such names as the Depositary for
         such Global Security shall direct.

                           (4) Every Security authenticated and delivered upon
         registration of transfer of, or in exchange for or in lieu of, a Global
         Security or any portion thereof, whether pursuant to this Section,
         Section 304, 306, 906 or 1107 or otherwise, shall be authenticated and
         delivered in the form of, and shall be, a Global Security, unless such
         Security is registered in the name of a Person other than the
         Depositary for such Global Security or a nominee thereof.

SECTION 306.  Mutilated, Destroyed, Lost and Stolen Securities.

                  If any mutilated Security is surrendered to the Trustee, the
Company shall execute, and the Trustee shall authenticate and deliver in
exchange therefor, a new Security of the same series and of like tenor and
principal amount and bearing a number not contemporaneously outstanding.

                  If there shall be delivered to the Company and the Trustee (i)
evidence to their satisfaction of the destruction, loss or theft of any Security
and (ii) such security or indemnity as may be required by them to save each of
them and any agent of either of them harmless, then, in the absence of notice to
the Company or the Trustee that such Security has been acquired by a bona fide
purchaser, the Company shall execute, and the Trustee shall authenticate and
deliver, in lieu of any such destroyed, lost or stolen Security, a new Security
of the same series and of like tenor and principal amount and bearing a number
not contemporaneously outstanding.

                  In case any such mutilated, destroyed, lost or stolen Security
has become or is about to become due and payable, the Company in its discretion
may, instead of issuing a new Security, pay such Security.

                  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 issued pursuant to this
Section in lieu of any destroyed, lost or stolen Security shall constitute an
original additional contractual obligation of the Company, whether or not the
destroyed, lost or stolen Security 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 duly issued
hereunder.

                                       17
<PAGE>   23

                  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.

SECTION 307.  Payment of Interest; Interest Rights Preserved.

                  Except as otherwise provided as contemplated by Section 301
with respect to any series of Securities, interest on any Security which 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.

                  Any interest on any Security of any series which 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
Holder 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
                  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 Security of
                  such series and the date of the proposed payment, and at the
                  same time the Company shall deposit with the Trustee an amount
                  of money 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 prior to the date
                  of the proposed payment, such money when deposited to be held
                  in trust for the benefit of the Persons entitled to such
                  Defaulted Interest as in this Clause provided. Thereupon the
                  Trustee shall fix a Special Record Date for the payment of
                  such Defaulted Interest which shall be not more than 15 days
                  and not less than 10 days prior to the date of the proposed
                  payment and not less than 10 days after the receipt by the
                  Trustee of the notice of the proposed payment. The Trustee
                  shall promptly notify the Company of such Special Record Date
                  and, in the name and at the expense of the Company, shall
                  cause notice of the proposed payment of such Defaulted
                  Interest and the Special Record Date therefor to be given to
                  each Holder of Securities of such series in the manner set
                  forth in Section 106, not less than 10 days prior to such
                  Special Record Date. Notice of the proposed payment of such
                  Defaulted Interest and the Special Record Date therefor having
                  been so mailed, such Defaulted Interest shall be paid to the
                  Persons in whose names the 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).

                           (2) The Company may make payment of any Defaulted
                  Interest on the 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.

                                       18
<PAGE>   24

                  Subject to the foregoing provisions of this Section, 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 308.  Persons Deemed Owners.

                  Prior to due presentment of a 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 Security is registered as the owner of
such Security for the purpose of receiving payment of principal of and any
premium and (subject to Section 307) any interest on such Security and for all
other purposes whatsoever, whether or not such 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.

SECTION 309.  Cancellation.

                  All Securities surrendered for payment, redemption, purchase,
registration of transfer or exchange or for credit against any sinking fund
payment shall, if surrendered to any Person other than the Trustee, be delivered
to the Trustee and shall be promptly canceled by it. The Company may at any time
deliver to the Trustee for cancellation any Securities previously authenticated
and delivered hereunder that 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 that the Company has not issued and sold, and all Securities so
delivered shall be promptly canceled by the Trustee. 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. All canceled
Securities held by the Trustee shall be disposed of in accordance with the
Trustee's document retention policies.

SECTION 310.  Computation of Interest.

                  Except as otherwise specified as contemplated by Section 301
for Securities of any series, interest on the Securities of each series shall be
computed on the basis of a 360-day year of twelve 30-day months.

                                  ARTICLE FOUR

                           SATISFACTION AND DISCHARGE

SECTION 401.  Satisfaction and Discharge of Indenture.

                  This Indenture shall upon Company Request cease to be of
further effect (except as to any surviving rights of registration of transfer or
exchange of Securities herein expressly provided for), and the Trustee, at the
expense of the Company, shall execute proper instruments acknowledging
satisfaction and discharge of this Indenture, when

                  (1)      either

                                       19

<PAGE>   25

                           (A) all Securities theretofore authenticated and
                  delivered (other than (i) Securities which have been
                  destroyed, lost or stolen and which have been replaced or paid
                  as provided in Section 306 and (ii) Securities 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 1003) have been delivered to the Trustee
                  for cancellation; or

                           (B) all such Securities 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) 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
                  deposited or caused to be deposited with the Trustee as trust
                  funds in trust money in an amount sufficient to pay and
                  discharge the entire indebtedness on such Securities not
                  theretofore delivered to the Trustee for cancellation, for
                  principal and any premium and interest 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 it; 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 have been satisfied.

                  Notwithstanding the satisfaction and discharge of this
Indenture, the obligations of the Company to the Trustee under Section 607, the
obligations of the Trustee to any Authenticating Agent under Section 614 and, if
money shall have been deposited with the Trustee pursuant to subclause (B) of
Clause (1) of this Section, the obligations of the Trustee under Section 402 and
the last paragraph of Section 1003 shall survive.

SECTION 402.  Application of Trust Money.

                  Subject to the provisions of the last paragraph of Section
1003, all money deposited with the Trustee pursuant to Section 401 shall be held
in trust and applied by it, in accordance with the provisions of the Securities
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 any premium and
interest for whose payment such money has been deposited with the Trustee.

                                       20
<PAGE>   26

                                  ARTICLE FIVE

                                    REMEDIES

SECTION 501.  Events of Default.

                  "Event of Default," wherever used herein with respect to
Securities of any series, means any one of the following events (whatever the
reason for such Event of Default and whether 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 upon any Security
         of that series when it becomes due and payable, and continuance of such
         default for a period of 30 days; or

                  (2) default in the payment of the principal of or any premium
         on any Security of that series at its Maturity; or

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

                  (4) default in the performance, or breach, of any covenant or
         warranty of the Company in this Indenture (other than a covenant or
         warranty a default in whose performance or whose breach is elsewhere in
         this Section specifically dealt with or which has expressly been
         included in this Indenture solely for the benefit of series of
         Securities other than that series), and continuance of such default or
         breach for a period of 90 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) the Company or any Restricted 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

                  (6) a court of competent jurisdiction enters an order or
         decree under any Bankruptcy Law that remains unstayed and in effect for
         60 days and that:

                           (A) is for relief against the Company or any
                  Restricted Subsidiary as debtor in an involuntary case;

                                       21
<PAGE>   27

                           (B) appoints a Custodian of the Company or any
                  Restricted Subsidiary or a Custodian for all or substantially
                  all of the property of the Company or any Restricted
                  Subsidiary; or

                           (C) orders the liquidation of the Company or any
                  Restricted Subsidiary; or

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

SECTION 502.  Acceleration of Maturity; Rescission and Annulment.

         If an Event of Default (other than an Event of Default
specified in Section 501(5) or 501(6)) with respect to Securities of any series
at the time Outstanding occurs and is continuing, then 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 of all
the Securities of that series (or, if any Securities of that series are Original
Issue Discount Securities, such portion of the principal amount of such
Securities as may be specified by the terms thereof) to be due and payable
immediately, by a notice in writing to the Company (and to the Trustee if given
by Holders), and upon any such declaration such principal amount (or specified
amount) shall become immediately due and payable. If an Event of Default
specified in Section 501(5) or 501(6) with respect to Securities of any series
at the time Outstanding occurs, the principal amount of all the Securities of
that series (or, if any Securities of that series are Original Issue Discount
Securities, such portion of the principal amount of such Securities as may be
specified by the terms thereof) shall automatically, and without any declaration
or other action on the part of the Trustee or any Holder, 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 and its
consequences if:

                  (1) the Company has paid or deposited with the Trustee a sum
         sufficient to pay

                           (A) all overdue interest on all Securities of that
                  series;

                           (B) the principal of (and premium, if any, on) any
                  Securities of that series that have become due otherwise than
                  by such declaration of acceleration and any interest thereon
                  at the rate or rates prescribed therefor in such Securities;

                           (C) to the extent that payment of such interest is
                  lawful, interest upon overdue interest at the rate or rates
                  prescribed therefor 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

                                       22
<PAGE>   28

                  (2) all Events of Default with respect to Securities of that
         series, other than the non-payment of the principal of Securities of
         that series that have become due solely by such declaration of
         acceleration, have been cured or waived as provided in Section 513.

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

SECTION 503.  Collection of Indebtedness and Suits for Enforcement by Trustee.

                  The Company covenants that if:

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

                  (2) default is made in the payment of the principal of (or
         premium, if any, on) any Security at the Maturity thereof,

the Company will, upon demand by the Trustee, pay to it, for the benefit of the
Holders of such Securities, the whole amount then due and payable on such
Securities for principal and any premium and interest and, to the extent that
payment of such interest shall be legally enforceable, interest on any overdue
principal and premium and on any overdue interest, at the rate or rates
prescribed therefor 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, may prosecute such proceeding to judgment or final decree and may
enforce the same against the Company or any other obligor upon such Securities
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, 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 by such appropriate judicial proceedings as the Trustee shall deem
most effectual to protect and enforce any such rights, whether for the specific
enforcement of any covenant or agreement in this Indenture or in aid of the
exercise of any power granted herein, or to enforce any other proper remedy.

                                       23
<PAGE>   29

SECTION 504.  Trustee May File Proofs of Claim.

                  In case of any judicial proceeding relative to the Company or
any other obligor upon the Securities, or the property or creditors of the
Company or any other obligor upon the Securities, the Trustee shall be entitled
and empowered, by intervention in such proceeding or otherwise, to take any and
all actions authorized under the Trust Indenture Act in order to have claims of
the Holders and the Trustee allowed in any such proceeding. In particular, the
Trustee shall be authorized 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 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 it for the reasonable compensation, expenses,
disbursements and advances of the Trustee, its agents and counsel, and any other
amounts due the Trustee under Section 607.

                  No provision of this Indenture shall be deemed to authorize
the Trustee to authorize or consent to or accept or adopt on behalf of any
Holder any plan of reorganization, arrangement, adjustment or composition
affecting the Securities or the rights of any Holder thereof or to authorize the
Trustee to vote in respect of the claim of any Holder in any such proceeding;
provided, however, that the Trustee may, on behalf of the Holders, vote for the
election of a trustee in bankruptcy or similar official and be a member of a
creditors' or other similar committee.

SECTION 505.  Trustee May Enforce Claims Without Possession of Securities.

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

SECTION 506.  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 any premium or interest, upon presentation of the Securities 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 under
         Section 607; and

                  SECOND: To the payment of the amounts then due and unpaid for
         principal of and any premium and interest on the Securities 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
         amounts due and payable on such Securities for principal and any
         premium and interest, respectively.

                                       24
<PAGE>   30

SECTION 507.  Limitation on Suits.

                  No Holder of any Security of any series 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
         reasonable indemnity against the costs, expenses and liabilities to be
         incurred in compliance with such request;

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

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

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

SECTION 508.  Unconditional Right of Holders to Receive Principal, Premium and
              Interest.

                  Notwithstanding any other provision in this Indenture, the
Holder of any Security shall have the right, which is absolute and
unconditional, to receive payment of the principal of and any premium and
(subject to Section 307) interest on such Security on the respective Stated
Maturities expressed in such Security (or, in the case of redemption or offer by
the Company to purchase the Securities pursuant to the terms of this Indenture,
on the Redemption Date or purchase date, as applicable) 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 509.  Restoration of Rights and Remedies.

                  If the Trustee or any Holder 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, subject to any
determination in such proceeding, the Company, the Trustee and the Holders shall
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.

                                       25
<PAGE>   31

SECTION 510.  Rights and Remedies Cumulative.

                  Except as otherwise provided with respect to the replacement
or payment of mutilated, destroyed, lost or stolen Securities in the last
paragraph of Section 306, no right or remedy herein conferred upon or reserved
to the Trustee or to the Holders 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 511.  Delay or Omission Not Waiver.

                  No delay or omission of the Trustee or of any Holder of any
Securities 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,
as the case may be.

SECTION 512.  Control by Holders.

                  The Holders of 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, and

                  (2) the Trustee may take any other action deemed proper by the
         Trustee that is not inconsistent with such direction.

SECTION 513.  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 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 any premium or
         interest on any Security of such series (including any Security that is
         required to have been purchased by the Company pursuant to an offer to
         purchase by the Company made pursuant to the terms of this Indenture),
         or

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

                                       26
<PAGE>   32

                  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 impair any right consequent thereon.

SECTION 514.  Undertaking for Costs.

                  In any suit for the enforcement of any right or remedy under
this Indenture, or in any suit against the Trustee for any action taken,
suffered or omitted by it as Trustee, a court may require any party litigant in
such suit to file an undertaking to pay the costs of such suit, and may assess
costs against any such party litigant, in the manner and to the extent provided
in the Trust Indenture Act; provided that neither this Section nor the Trust
Indenture Act shall be deemed to authorize any court to require such an
undertaking or to make such an assessment in any suit instituted by the Company.

SECTION 515.  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, that 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.

                                  ARTICLE SIX

                                  THE TRUSTEE

SECTION 601.  Certain Duties and Responsibilities.

                  The duties and responsibilities of the Trustee shall be as
provided by the Trust Indenture Act. 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. 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.

SECTION 602.  Notice of Defaults.

                  If a default occurs hereunder with respect to Securities of
any series, the Trustee shall give the Holders of Securities of such series
notice of such default as and to the extent provided by the Trust Indenture Act;
provided, however, that in the case of any default of the character specified in
Section 501(4) and, if so specified as contemplated by Section 301, any other
Event of Default provided as contemplated by Section 301 and Section 501(7) with
respect to Securities of such series, no such notice to Holders shall be given
until at least 30 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 Securities of
such series.

                                       27
<PAGE>   33

SECTION 603.  Certain Rights of Trustee.

                  Subject to the provisions of Section 601:

                  (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, other evidence of indebtedness 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,
         and any resolution of the Board of Directors shall be sufficiently
         evidenced by a Board Resolution;

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

                  (4) the Trustee may consult with counsel 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 pursuant to this Indenture, unless
         such Holders shall have offered to the Trustee reasonable security or
         indemnity against the costs, expenses and liabilities that 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, other evidence of indebtedness
         or other paper or document, but 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, personally or by agent or
         attorney; and

                  (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.

SECTION 604.  Not Responsible for Recitals or Issuance of Securities.

                  The recitals contained herein and in the Securities, except
the Trustee's certificates of authentication, shall be taken as the statements
of the Company, and neither the Trustee nor any Authenticating Agent assumes any
responsibility for their correctness. The Trustee makes no representations as to
the validity or sufficiency of this Indenture or of the Securities. Neither the
Trustee nor any Authenticating Agent shall be accountable for the use or
application by the Company of Securities or the proceeds thereof.

                                       28
<PAGE>   34

SECTION 605.  May Hold Securities.

                  The Trustee, any Authenticating Agent, any Paying Agent, any
Security Registrar or any other agent of the Company, in its individual or any
other capacity, may become the owner or pledgee of Securities and, subject to
Sections 608 and 613, may otherwise deal with the Company with the same rights
it would have if it were not Trustee, Authenticating Agent, Paying Agent,
Security Registrar or such other agent.

SECTION 606.  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 607.  Compensation and Reimbursement.

                  The Company agrees:

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

                  (2) except as otherwise expressly provided herein, to
         reimburse the 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 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 the 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 expenses of defending itself against any claim
         or liability in connection with the exercise or performance of any of
         its powers or duties hereunder.

SECTION 608.  Conflicting Interests.

                  If the Trustee has or shall acquire a conflicting interest
within the meaning of the Trust Indenture Act, the Trustee shall either
eliminate such interest or resign, to the extent and in the manner provided by,
and subject to the provisions of, the Trust Indenture Act and this Indenture. To
the extent permitted by such Act, the Trustee shall not be deemed to have a
conflicting interest by virtue of being a trustee under this Indenture with
respect to Securities of more than one series.

                                       29
<PAGE>   35

SECTION 609.  Corporate Trustee Required; Eligibility.

                  There shall at all times be one (and only one) Trustee
hereunder with respect to the Securities of each series, which may be Trustee
hereunder for Securities of one or more other series. Each Trustee shall be a
Person that is eligible pursuant to the Trust Indenture Act to act as such, and
has a combined capital and surplus of at least $50,000,000. If any such Person
publishes reports of condition at least annually, pursuant to law or to the
requirements of its supervising or examining authority, then for the purposes of
this Section and to the extent permitted by the Trust Indenture Act, the
combined capital and surplus of such Person 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 with respect to the Securities of any
series 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.

SECTION 610.  Resignation and Removal; Appointment of Successor.

                  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 611.

                  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 the instrument of acceptance by a successor Trustee required by
Section 611 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 with
respect to the Securities of such series.

                  The Trustee may be removed at any time with respect to the
Securities of any series by Act of the Holders of a majority in principal amount
of the Outstanding Securities of such series, delivered to the Trustee and to
the Company.

                  If at any time:

                  (1) the Trustee shall fail to comply with Section 608 after
         written request therefor by the Company or by any Holder 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 609
         and shall fail to resign after written request therefor by the Company
         or by any such Holder, 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, (A) the Company by a Board Resolution may remove the
Trustee with respect to all Securities or (B) subject to Section 514, any Holder
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.

                                       30
<PAGE>   36

                  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 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) and shall comply with the
applicable requirements of Section 611. 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 any retiring
Trustee or successor Trustee appointed by the Company, the successor Trustee so
appointed by such Holders shall, forthwith upon its acceptance of such
appointment in accordance with the applicable requirements of Section 611,
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 and accepted appointment in the
manner required by Section 611, any Holder 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 the Securities of such
series.

                  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
to all Holders of Securities of such series in the manner provided in Section
106. 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.

SECTION 611.  Acceptance of Appointment by Successor.

                  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 the 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.

                  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
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-

                                       31
<PAGE>   37

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.

                  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 the first or second preceding paragraph, as the case may be.

                  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 612.  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 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 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 so authenticated with the same
effect as if such successor Trustee had itself authenticated such Securities.

SECTION 613.  Preferential Collection of Claims Against Company.

                  If and when the Trustee shall be or become a creditor of the
Company or any other obligor upon the Securities, the Trustee shall be subject
to the provisions of the Trust Indenture Act regarding the collection of claims
against the Company or any such other obligor.

                                       32
<PAGE>   38

SECTION 614.  Appointment of Authenticating Agent.

                  The Trustee may appoint an Authenticating Agent or Agents with
respect to one or more series of Securities that shall be authorized to act on
behalf of the Trustee to authenticate Securities of such series issued upon
original issue and upon exchange, registration of transfer or partial redemption
thereof or pursuant to Section 306, 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. 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 corporation or association
organized and doing business under the laws of the United States of America, any
state thereof or the District of Columbia, authorized under such laws to act as
Authenticating Agent, having a combined capital and surplus of not less than
$50,000,000 and subject to supervision or examination by federal or state
authority. If such Authenticating Agent publishes reports of condition at least
annually, pursuant to law or to the requirements of said 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. If at any time an Authenticating Agent shall cease to be eligible in
accordance with the provisions of this Section, such Authenticating Agent shall
resign immediately in the manner and with the effect specified in this Section.

                  Any corporation into which an Authenticating Agent may be
merged or converted or with which it may be consolidated, or any corporation
resulting from any merger, conversion or consolidation to which such
Authenticating Agent shall be a party, or any corporation succeeding to the
corporate agency or corporate trust business of an Authenticating Agent, shall
continue to be an Authenticating Agent, provided such corporation shall be
otherwise eligible under this Section, without the execution or filing of any
paper or any further act on the part of the Trustee or the Authenticating Agent.

                  An Authenticating Agent may resign at any time by giving
written notice thereof to the Trustee and to the Company. The Trustee may at any
time terminate the agency of an Authenticating Agent by giving written notice
thereof 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 may appoint a successor Authenticating
Agent that is be acceptable to the Company and shall give notice of such
appointment in the manner provided in Section 106 to all Holders of Securities
of the series with respect to which such Authenticating Agent will serve. 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.
No successor Authenticating Agent shall be appointed unless eligible under the
provisions of this Section.

                  The Trustee agrees to pay to each Authenticating Agent from
time to time reasonable compensation for its services under this Section, and
the Trustee shall be entitled to be reimbursed for such payments, subject to the
provisions of Section 607.

                  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 the Trustee's certificate of authentication, an
alternative certificate of authentication in the following form:

                                       33
<PAGE>   39

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

                                       First Union National Bank,
                                         As Trustee

                                       By:[Name of Authenticating Agent],
                                         As Authenticating Agent

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

                                  ARTICLE SEVEN

               HOLDERS' LISTS AND REPORTS BY TRUSTEE AND COMPANY

SECTION 701.  Company to Furnish Trustee Names and Addresses of Holders.

                  The Company will furnish or cause to be furnished to the
Trustee with respect to the Securities of each series:

                  (1) not more than 10 days after each Regular Record Date with
         respect to the payment of interest, if any, a list, in such form as the
         Trustee may reasonably require, of the names and addresses of the
         Holders of Securities of such series as of such Regular Record Date,
         and

                  (2) 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;

excluding from any such list names and addresses received by the Trustee in its
capacity as Security Registrar.

SECTION 702.  Preservation of Information; Communications to Holders.

                  The Trustee shall preserve, in as current a form as is
reasonably practicable, the names and addresses of Holders contained in the most
recent list furnished to the Trustee as provided in Section 701 and the names
and addresses of Holders received by the Trustee in its capacity as Security
Registrar. The Trustee may destroy any list furnished to it as provided in
Section 701 upon receipt of a new list so furnished.

                  The rights of Holders to communicate with other Holders with
respect to their rights under this Indenture or under the Securities, and the
corresponding rights and privileges of the Trustee, shall be as provided by the
Trust Indenture Act.

                                       34
<PAGE>   40

                  Every Holder of Securities, by receiving and holding the same,
agrees with the Company and the Trustee that neither the Company nor the Trustee
nor any agent of any of them shall be held accountable by reason of any
disclosure of information as to names and addresses of Holders made pursuant to
the Trust Indenture Act.

SECTION 703.  Reports by Trustee.

                  The Trustee shall transmit to Holders such reports concerning
the Trustee and its actions under this Indenture as may be required pursuant to
the Trust Indenture Act at the times and in the manner provided pursuant
thereto.

                  A copy of each such report shall, at the time of such
transmission to Holders, be filed by the Trustee with each stock exchange upon
which any Securities are listed, with the Commission and with the Company. The
Company will notify the Trustee when any Securities are listed on any stock
exchange.

SECTION 704.  Reports by Company.

                  The Company shall file with the Trustee and the Commission,
and transmit to Holders, such information, documents and other reports, and such
summaries thereof, as may be required pursuant to the Trust Indenture Act at the
times and in the manner provided pursuant to such Act; provided that any such
information, documents or reports required to be filed with the Commission
pursuant to Section 13 or 15(d) of the Exchange Act shall be filed with the
Trustee within 30 days after the same is so required to be filed with the
Commission.

                                  ARTICLE EIGHT

              CONSOLIDATION, MERGER, CONVEYANCE, TRANSFER OR LEASE

SECTION 801.  Company May Consolidate, Etc., Only on Certain Terms.

                  The Company shall not, in a single transaction or a series of
related transactions, consolidate with or merge into any other Person or permit
any other Person to consolidate with or merge into the Company or, directly or
indirectly, transfer, convey, sell, lease or otherwise dispose of all or
substantially all of its assets, unless:

                  (1) in a transaction in which the Company does not survive or
         in which the Company transfers, conveys, sells, leases or otherwise
         disposes of all or substantially all of its assets, the successor
         entity (for purposes of this Article Eight, a "Successor Company")
         shall be a corporation, partnership, limited liability company, trust
         or other entity organized and validly existing under the laws of the
         United States of America, any state thereof or the District of
         Columbia, and shall expressly assume, by an indenture supplemental
         hereto, executed and delivered to the Trustee, in form satisfactory to
         the Trustee, the due and punctual payment of the principal of and any
         premium and interest on all the Securities and the performance or
         observance of every covenant of this Indenture on the part of the
         Company to be performed or observed;

                                       35
<PAGE>   41

                  (2) immediately after giving effect to such transaction and
         treating any indebtedness that becomes an obligation of the Company or
         any Subsidiary as a result of such transaction 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 lapse of time or
         both, would become an Event of Default, shall have happened and be
         continuing;

                  (3) if, as a result of any such consolidation or merger or
         such conveyance, transfer or lease, properties or assets of the Company
         would become subject to a mortgage, pledge, lien, security interest or
         other encumbrance that would not be permitted by this Indenture, the
         Company or such successor Person, as the case may be, shall take such
         steps as shall be necessary effectively to secure the Securities
         equally and ratably with (or prior to) all indebtedness secured
         thereby;

                  (4) any other conditions provided pursuant to Section 301 with
         respect to the Securities of a series are satisfied; and

                  (5) the Company has delivered to the Trustee an Officers'
         Certificate and an Opinion of Counsel, each stating that such
         consolidation, merger, transfer, conveyance, sale, lease or other
         disposition and, if a supplemental indenture is required in connection
         with such transaction, such supplemental indenture comply with this
         Article and that all conditions precedent herein provided for relating
         to such transaction have been complied with.

SECTION 802.  Successor Substituted.

                  Upon any consolidation of the Company with, or merger of the
Company into, any other Person or any transfer, conveyance, sale, lease or other
disposition of all or substantially all of the properties and assets of the
Company as an entirety in accordance with Section 801, the Successor Company
shall succeed to, and be substituted for, and may exercise every right and power
of, the Company under this Indenture with the same effect as if such successor
Person had been named as the Company herein, and thereafter, except in the case
of a lease, the predecessor Person shall be relieved of all obligations and
covenants under this Indenture and the Securities.

                                  ARTICLE NINE

                            SUPPLEMENTAL INDENTURES

SECTION 901.  Supplemental Indentures Without Consent of Holders.

                  Without the consent of any Holders, the Company, when
authorized by 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; 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

                                       36
<PAGE>   42

                  (3) to add any additional Events of Default for the benefit of
         the Holders of all or any series of Securities (and if such additional
         Events of Default are to be for the benefit of less than all series of
         Securities, stating that such additional Events of Default are
         expressly being included solely for the benefit of such series); or

                  (4) to add to or change any of the provisions of this
         Indenture to such extent as shall be necessary to permit or facilitate
         the issuance of Securities in bearer form, registrable or not
         registrable as to principal, and with or without interest coupons, or
         to permit or facilitate the issuance of Securities in uncertificated
         form; or

                  (5) to add to, change or eliminate any of the provisions of
         this Indenture in respect of one or more series of Securities, provided
         that any such addition, change or elimination (A) shall neither (i)
         apply to any Security of any series created prior to the execution of
         such supplemental indenture and entitled to the benefit of such
         provision nor (ii) modify the rights of the Holder of any such Security
         with respect to such provision or (B) shall become effective only when
         there is no such Security Outstanding; or

                  (6) to secure the Securities or provide for the guarantee of
         the Company's obligations under this Indenture and with respect to the
         Securities by another Person; or

                  (7) to establish the form or terms of Securities of any series
         as permitted by Sections 201 and 301; 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,
         pursuant to the requirements of Section 611; 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, provided that such
         action pursuant to this Clause (9) shall not adversely affect the
         interests of the Holders of Securities of any series in any material
         respect.

SECTION 902.  Supplemental Indentures With Consent of Holders.

                  With the consent of the Holders of not less than a majority in
principal amount of the Outstanding Securities of each series affected by such
supplemental indenture, by Act of said Holders delivered to the Company and the
Trustee, the Company, when authorized by a Board Resolution, and the Trustee may
enter into an indenture or indentures supplemental hereto for the purpose of
adding any provisions to or changing in any manner or eliminating any of the
provisions of this Indenture or of modifying in any manner the rights of the
Holders of Securities of such series 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 any
         installment of principal of or interest on, any Security, or reduce the
         principal amount thereof or the rate of interest thereon or any premium
         payable upon the redemption thereof, or reduce the amount of the
         principal of an

                                       37
<PAGE>   43

         Original Issue Discount Security or any other Security which would be
         due and payable upon a declaration of acceleration of the Maturity
         thereof pursuant to Section 502, or change any Place of Payment where,
         or the coin or currency in which, any Security or any premium or
         interest thereon is payable, or change any right of redemption,
         purchase or repayment by the Company at the option of the Holder, 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, on or after the Redemption Date or in the case of an offer
         to purchase Securities that has been made pursuant to a covenant
         contained in this Indenture, on or after the applicable purchase date),
         or subordinate in any manner the payment of the principal of, or the
         premium or interest on, any Security to the payment of any other
         security, 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 (of compliance with certain
         provisions of this Indenture or certain defaults hereunder and their
         consequences) provided for in this Indenture,

                  (3) modify any of the provisions of this Section, Section 513
         or Section 1008, except to increase any such percentage 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
         and Section 1008, or the deletion of this proviso, in accordance with
         the requirements of Sections 611 and 901(8); or

                  (4) following the making of an offer to purchase Securities
         which has been made pursuant to a covenant contained in this Indenture,
         modify the provisions of this Indenture with respect to such offer to
         purchase in a manner adverse to such Holder.

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

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

SECTION 903.  Execution of Supplemental Indentures.

                  In executing, or accepting the additional trusts created by,
any supplemental indenture permitted by this Article or the modifications
thereby of the trusts created by this Indenture, the Trustee shall be entitled
to receive, and (subject to Section 601) 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 that
affects the Trustee's own rights, duties or immunities under this Indenture or
otherwise.

                                       38
<PAGE>   44

SECTION 904.  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 shall be bound thereby.

SECTION 905.  Conformity with Trust Indenture Act.

                  Every supplemental indenture executed pursuant to this Article
shall conform to the requirements of the Trust Indenture Act.

SECTION 906.  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 such new Securities may be
authenticated and delivered by the Trustee in exchange for Outstanding
Securities of such series.

                                  ARTICLE TEN

                                   COVENANTS

SECTION 1001.  Payment of Principal, Premium and Interest.

                  The Company covenants and agrees for the benefit of each
series of Securities that it will duly and punctually pay the principal of and
any premium and interest on the Securities of that series in accordance with the
terms of the Securities of that series and this Indenture.

SECTION 1002.  Maintenance of Office or Agency.

                  The Company will maintain in each Place of Payment for any
series of Securities an office or agency (which may be an office of the Trustee,
the Registrar or any Paying Agent with respect to such series of Securities)
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. Unless otherwise
designated by the Company by written notice to the Trustee, such office or
agency shall be the Corporate Trust Office of the Trustee. The Company will give
prompt written notice to the Trustee of the location, and any change in the
location, of 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, and the
Company hereby appoints the Trustee as its agent to receive all such
presentations, surrenders, notices and demands.

                                       39
<PAGE>   45

                  The Company may also 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 such purposes and may from time to time
rescind such designations; provided that no such designation or rescission shall
in any manner relieve the Company of its obligation to maintain an office or
agency in each Place of Payment 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.

SECTION 1003.  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 Securities, it will, on or before each due date of
the principal of or any premium or interest on any of the Securities of that
series, segregate and hold in trust for the benefit of the Persons entitled
thereto a sum sufficient to pay the principal and any premium and interest 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, it will, prior to each due date of the principal of or
any premium or interest on any Securities of that series, deposit with a Paying
Agent a sum sufficient to pay such amount, such sum to be held as provided by
the Trust Indenture Act, 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 (1) comply with the
provisions of the Trust Indenture Act applicable to it as a Paying Agent and (2)
during the continuance of any default by the Company or any other obligor upon
the Securities of that series in the making of any payment in respect of the
Securities of that series, upon the written request of the Trustee, forthwith
pay to the Trustee all sums held in trust by such Paying Agent for payment in
respect of the Securities of that series.

                  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 money.

                  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 or any
premium or interest on any Security of any series and remaining unclaimed for
two years after such principal, premium or interest has become due and payable
shall be paid to the Company on Company Request (unless otherwise required by
mandatory provisions of applicable escheat or abandoned or unclaimed property
law), or (if then held by the Company) shall be discharged from such trust
(unless otherwise required by mandatory provisions of applicable escheat or
abandoned or unclaimed property law); and the Holder of such Security shall
thereafter (unless otherwise required by mandatory provisions of applicable
escheat or abandoned or unclaimed property law), as an unsecured general
creditor, look only to the Company for payment thereof, and all liability of the
Trustee or such Paying Agent with respect to such trust money, and all

                                       40
<PAGE>   46

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 a newspaper published in the English language, customarily published on
each Business Day and of general circulation in the City of New York, New York,
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 1004.  Statement by Officers as to Default.

                  (a) The Company will deliver to the Trustee, within 120 days
after the end of each fiscal year of the Company ending after the date hereof,
an Officers' Certificate, stating whether or not to the best knowledge of the
signers thereof the Company is in default in the performance and observance of
any of the terms, provisions and conditions of this Indenture (without regard to
any period of grace or requirement of notice provided hereunder) and, if the
Company shall be in default, specifying all such defaults and the nature and
status thereof of which they may have knowledge.

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

SECTION 1005.  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 and the corporate, partnership and existence of each
Subsidiary and all rights (charter and statutory) and franchises of the Company
and each Subsidiary; provided, however, that the Company shall not be required
to preserve the corporate, partnership or other existence of any Subsidiary or
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 its Subsidiaries and that the loss thereof would not have a
material adverse effect on the business, prospects, assets or financial
condition of the Company and its Subsidiaries taken as a whole and would not
have any material adverse effect on the payment and performance of the
obligations of the Company under the Securities and this Indenture.

SECTION 1006.  Maintenance of Properties.

                  The Company will cause all properties used or useful in the
conduct of its business or the business of any Subsidiary to be maintained and
kept in good condition, repair and working order (reasonable wear and tear
excepted) 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 that nothing in this Section shall prevent the
Company from discontinuing the operation or maintenance of any of such
properties if such discontinuance is, in the judgment of the Company, desirable
in the conduct of its business or the business of any Subsidiary and not
disadvantageous in any material respect to the Holders.

                                       41
<PAGE>   47

SECTION 1007.  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 the Company or any Restricted
Subsidiary or upon the income, profits or property of the Company or any
Restricted 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 Restricted Subsidiary; provided 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 1008.  Waiver of Certain Covenants.

                  Except as otherwise specified as contemplated by Section 301
for Securities of such series, the Company may, with respect to the Securities
of any series, omit in any particular instance to comply with any term,
provision or condition set forth in any covenant provided pursuant to Section
301(18), 901(2) or 901(7) for the benefit of the Holders of such series if
before the time for such compliance the Holders of at least a majority in
principal amount of the Outstanding Securities of such series shall, by Act of
such Holders, either waive such compliance in such instance or generally waive
compliance with such term, provision or condition, but no such waiver shall
extend to or affect such term, provision or condition 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 or condition shall remain in full force and effect.

                                 ARTICLE ELEVEN

                            REDEMPTION OF SECURITIES

SECTION 1101.  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 301 for such Securities) in
accordance with this Article.

SECTION 1102.  Election to Redeem; Notice to Trustee.

                  The election of the Company to redeem any Securities shall be
evidenced by a Board Resolution or in another manner specified as contemplated
by Section 301 for such Securities. In case of any redemption at the election of
the Company of less than all the Securities of any series (including any such
redemption affecting only a single Security), the Company shall, at least 60
days prior to the Redemption Date fixed by the Company (unless a shorter notice
shall be satisfactory to the Trustee), notify the Trustee of such Redemption
Date, of the principal amount of Securities of such series to be redeemed and,
if applicable, of the tenor of the Securities to be redeemed. In the case of any
redemption of Securities (1) prior to the expiration of any restriction on such
redemption provided in the terms of such Securities or elsewhere in this
Indenture or (2) pursuant to an election of the Company that is subject to a
condition specified in the terms of such Securities, the Company shall furnish
the Trustee with an Officers' Certificate evidencing compliance with such
restriction or condition.

                                       42
<PAGE>   48

SECTION 1103.  Selection by Trustee of Securities to Be Redeemed.

                  If less than all the Securities of any series are to be
redeemed (unless all the Securities of such series and of a specified tenor are
to be redeemed or unless such redemption affects only a single Security), the
particular Securities to be redeemed shall be selected not more than 60 days
prior to the Redemption Date by the Trustee, from the Outstanding Securities of
such series 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 a portion of the principal amount of any Security of such series,
provided that the unredeemed portion of the principal amount of any Security
shall be in an authorized denomination (which shall not be less than the minimum
authorized denomination) for such Security. If less than all the Securities of
such series and of a specified tenor are to be redeemed (unless such redemption
affects only a single Security), the particular Securities to be redeemed shall
be selected not more than 60 days prior to the Redemption Date by the Trustee,
from the Outstanding Securities of such series and specified tenor not
previously called for redemption in accordance with the preceding sentence.

                  The Trustee shall promptly notify the Company in writing of
the Securities selected for redemption as aforesaid and, in case of any
Securities selected for partial redemption as aforesaid, the principal amount
thereof to be redeemed.

                  The provisions of the two preceding paragraphs shall not apply
with respect to any redemption affecting only a single Security, whether such
Security is to be redeemed in whole or in part. In the case of any such
redemption in part, the unredeemed portion of the principal amount of the
Security shall be in an authorized denomination (which shall not be less than
the minimum authorized denomination) for such Security.

                  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 Securities redeemed or to be redeemed only in
part, to the portion of the principal amount of such Securities which has been
or is to be redeemed.

SECTION 1104.  Notice of Redemption.

                  Notice of redemption shall be given by first-class mail,
postage prepaid, mailed not less than 30 nor more than 60 days prior to the
Redemption Date, to each Holder of Securities to be redeemed, at his address
appearing in the Security Register.

                  All notices of redemption shall state:

                  (1) the Redemption Date;

                  (2) the Redemption Price;

                  (3) if less than all the Outstanding Securities of any series
         consisting of more than a single Security are to be redeemed, the
         identification (and, in the case of partial redemption of any such
         Securities, the principal amounts) of the particular Securities to be
         redeemed and, if less than all the Outstanding Securities of any series
         consisting of a single Security are to be redeemed, the principal
         amount of the particular Security to be redeemed;

                                       43
<PAGE>   49

                  (4) that on the Redemption Date the Redemption Price will
         become due and payable upon each such Security to be redeemed and, if
         applicable, that interest thereon will cease to accrue on and after
         said date;

                  (5) the place or places where each such Security is to be
         surrendered for payment of the Redemption Price; and

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

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

SECTION 1105.  Deposit of Redemption Price.

                  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, segregate and hold in trust as provided in Section 1003) an amount
of money sufficient to pay the Redemption Price of, and (except if the
Redemption Date shall be an Interest Payment Date) accrued interest on, all the
Securities that are to be redeemed on that date.

SECTION 1106.  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, and from and after such date
(unless the Company shall default in the payment of the Redemption Price and
accrued interest) such Securities shall cease to bear interest. Upon surrender
of any such Security for redemption in accordance with such notice, such
Security shall be paid by the Company at the Redemption Price, together with
accrued interest to the Redemption Date; provided, however, that, unless
otherwise specified as contemplated by Section 301, installments of interest
whose Stated Maturity is on or prior to the Redemption Date will 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 307.

                  If any Security called for redemption shall not be so paid
upon surrender thereof for redemption, the principal and any premium shall,
until paid, bear interest from the Redemption Date at the rate prescribed
therefor in the Security.

SECTION 1107.  Securities Redeemed in Part.

                  Any Security that is to be redeemed only in part 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 and of
like tenor, of any authorized denomination as requested by such Holder, in
aggregate principal amount equal to and in exchange for the unredeemed portion
of the principal of the Security so surrendered.

                                       44
<PAGE>   50

                                 ARTICLE TWELVE

                                 SINKING FUNDS

SECTION 1201.  Applicability of Article.

                  The provisions of this Article shall be applicable to any
sinking fund for the retirement of Securities of any series except as otherwise
specified as contemplated by Section 301 for such Securities.

                  The minimum amount of any sinking fund payment provided for by
the terms of any Securities 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 is herein referred to as an "optional sinking fund
payment." If provided for by the terms of any Securities, the cash amount of any
sinking fund payment may be subject to reduction as provided in Section 1202.
Each sinking fund payment shall be applied to the redemption of Securities as
provided for by the terms of such Securities.

SECTION 1202.  Satisfaction of Sinking Fund Payments with Securities.

                  The Company (1) may deliver Outstanding Securities of a series
(other than any previously called for redemption) and (2) may apply as a credit
Securities of a series that 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, in each case in satisfaction of all or any part of any sinking fund
payment with respect to any Securities of such series required to be made
pursuant to the terms of such Securities as and to the extent provided for by
the terms of such Securities; provided that the Securities to be so credited
have not been previously so credited. The Securities to be so credited shall be
received and credited for such purpose by the Trustee at the Redemption Price,
as specified in the Securities so to be redeemed, for redemption through
operation of the sinking fund and the amount of such sinking fund payment shall
be reduced accordingly.

SECTION 1203.  Redemption of Securities for Sinking Fund.

                  Not less than 35 days prior to each sinking fund payment date
for any Securities, the Company will deliver to the Trustee an Officers'
Certificate specifying the amount of the next ensuing sinking fund payment for
such Securities pursuant to the terms of such Securities, the portion thereof,
if any, that will be satisfied by payment of cash and the portion thereof, if
any, that will be satisfied by delivering and crediting Securities pursuant to
Section 1202 and will also deliver to the Trustee any Securities to be so
delivered. Not less than 32 days prior to 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 1103 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 1104. Such notice having been duly given, the
redemption of such Securities shall be made upon the terms and in the manner
stated in Sections 1106 and 1107.

                                       45
<PAGE>   51

                                ARTICLE THIRTEEN

                       DEFEASANCE AND COVENANT DEFEASANCE

SECTION 1301.  Company's Option to Effect Defeasance or Covenant Defeasance.

                  The Company may elect, at its option at any time, to have
Section 1302 or Section 1303 applied to any Securities or any series of
Securities, as the case may be, designated pursuant to Section 301 as being
defeasible pursuant to such Section 1302 or 1303, in accordance with any
applicable requirements provided pursuant to Section 301 and upon compliance
with the conditions set forth below in this Article. Any such election shall be
evidenced in or pursuant to a Board Resolution or in another manner specified as
contemplated by Section 301 for such Securities.

SECTION 1302.  Defeasance and Discharge.

                  Upon the Company's exercise of its option (if any) to have
this Section applied to any Securities or any series of Securities, as the case
may be, the Company shall be deemed to have been discharged from its obligations
as provided in this Section on and after the date the conditions set forth in
Section 1304 are satisfied (hereinafter called "Defeasance"). For this purpose,
such Defeasance means that the Company shall be deemed to have paid and
discharged the entire indebtedness represented by such Securities and to have
satisfied all its other obligations under such Securities and this Indenture
insofar as such Securities are concerned (and the Trustee, at the expense of the
Company, shall execute proper instruments acknowledging the same), subject to
the following, which shall survive until otherwise terminated or discharged
hereunder: (1) the rights of Holders of such Securities to receive, solely from
the trust fund described in Section 1304 and as more fully set forth in such
Section, payments in respect of the principal of and any premium and interest on
such Securities when payments are due, (2) the Company's obligations with
respect to such Securities under Sections 304, 305, 306, 1002 and 1003, (3) the
rights, powers, trusts, duties and immunities of the Trustee hereunder and (4)
this Article. Subject to compliance with this Article, the Company may exercise
its option (if any) to have this Section applied to any Securities
notwithstanding the prior exercise of its option (if any) to have Section 1303
applied to such Securities.

SECTION 1303.  Covenant Defeasance.

                  Upon the Company's exercise of its option (if any) to have
this Section applied to any Securities or any series of Securities, as the case
may be, the Company shall be released from its obligations under Section 801(3),
Sections 1005 through 1007, inclusive, and any covenants provided pursuant to
Section 301(18), 901(2) or 901(7) for the benefit of the Holders of such
Securities with respect to such Securities as provided in this Section on and
after the date the conditions set forth in Section 1304 are satisfied
(hereinafter called "Covenant Defeasance"). For this purpose, such Covenant
Defeasance means that, with respect to such Securities, 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 specified Section, whether directly or
indirectly by reason of any reference elsewhere herein to any such Section or by
reason of any reference in any such Section to any other provision herein or in
any other document, but the remainder of this Indenture and such Securities
shall be unaffected thereby.

                                       46
<PAGE>   52

SECTION 1304.  Conditions to Defeasance or Covenant Defeasance.

                  The following shall be the conditions to the application of
Section 1302 or Section 1303 to any Securities or any series of Securities, as
the case may be:

                  (1) The Company shall irrevocably have deposited or caused to
         be deposited with the Trustee (or another trustee which satisfies the
         requirements contemplated by Section 609 and agrees to comply with the
         provisions of this Article 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 benefits of the Holders
         of such Securities, (A) money in an amount, or (B) U.S. Government
         Obligations which through the scheduled payment of principal and
         interest in respect thereof in accordance with their terms will
         provide, not later than one day before the due date of any payment,
         money in an amount, or (C) a combination thereof, in each case
         sufficient (without consideration of the reinvestment of any such
         amounts), 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 any such other qualifying trustee) to pay
         and discharge, the principal of and any premium and interest on such
         Securities on the respective Stated Maturities, in accordance with the
         terms of this Indenture and such Securities. As used herein, "U.S.
         Government Obligation" means (x) any security which is (i) a direct
         obligation of the United States of America for the payment of which the
         full faith and credit of the United States of America is pledged or
         (ii) an obligation of a Person controlled or supervised by and acting
         as an agency or instrumentality of the United States of America the
         payment of which is unconditionally guaranteed as a full faith and
         credit obligation by the United States of America, which, in either
         case (i) or (ii), is not callable or redeemable at the option of the
         issuer thereof, and (y) any depositary receipt issued by a bank (as
         defined in Section 3(a)(2) of the Securities Act) as custodian with
         respect to any U.S. Government Obligation that is specified in Clause
         (x) above and held by such bank for the account of the holder of such
         depositary receipt, or with respect to any specific payment of
         principal of or interest on any U.S. Government Obligation that is so
         specified and held, 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 depositary receipt from any amount
         received by the custodian in respect of the U.S. Government Obligation
         or the specific payment of principal or interest evidenced by such
         depositary receipt.

                  (2) In the event of an election to have Section 1302 apply to
         any Securities or any series of Securities, as the case may be, the
         Company shall have delivered to the Trustee an Opinion of Counsel
         stating that (A) the Company has received from, or there has been
         published by, the Internal Revenue Service a ruling or (B) since the
         date of this instrument, there has been a change in the applicable
         federal income tax law, in either case (A) or (B) to the effect that,
         and based thereon such opinion shall confirm that, the Holders of such
         Securities will not recognize income, gain or loss for federal income
         tax purposes as a result of the deposit, Defeasance and discharge to be
         effected with respect to such Securities and will be subject to federal
         income tax on the same amount, in the same manner and at the same times
         as would be the case if such deposit, Defeasance and discharge were not
         to occur.

                  (3) In the event of an election to have Section 1303 apply to
         any Securities or any series of Securities, as the case may be, the
         Company shall have delivered to the Trustee an Opinion of Counsel to
         the effect that the Holders of such Securities will not recognize
         income, gain or loss for federal income tax purposes as a result of the
         deposit and Covenant Defeasance to be effected with respect to such
         Securities and will be subject to federal income tax on the same

                                       47
<PAGE>   53
         amount, in the same manner and at the same times as would be the case
         if such deposit and Covenant Defeasance were not to occur.

                  (4) The Company shall have delivered to the Trustee an
         Officer's Certificate to the effect that neither such Securities nor
         any other Securities of the same series, if then listed on any
         securities exchange, will be delisted as a result of such deposit.

                  (5) No event which is, or after notice or lapse of time or
         both would become, an Event of Default with respect to such Securities
         or any other Securities shall have occurred and be continuing at the
         time of such deposit or, with regard to any such event specified in
         Sections 501(5) and (6), at any time on or prior to the 121st day after
         the date of such deposit (it being understood that this condition shall
         not be deemed satisfied until after such 121st day).

                  (6) Such Defeasance or Covenant Defeasance shall not cause the
         Trustee to have a conflicting interest within the meaning of the Trust
         Indenture Act (assuming all Securities are in default within the
         meaning of such Act).

                  (7) Such Defeasance or Covenant Defeasance shall not result in
         a breach or violation of, or constitute a default under, any other
         agreement or instrument to which the Company is a party or by which it
         is bound.

                  (8) The Company shall have delivered to the Trustee an Opinion
         of Counsel to the effect that such deposit shall not cause either the
         Trustee or the trust so created to be subject to the Investment Company
         Act of 1940.

                  (9) The Company shall have delivered to the Trustee an
         Officer's Certificate and an Opinion of Counsel, each stating that all
         conditions precedent with respect to such Defeasance or Covenant
         Defeasance have been complied with.

SECTION 1305.  Deposited Money and U.S. Government Obligations to be
               Held in Trust; Miscellaneous Provisions.

                  Subject to the provisions of the last paragraph of Section
1003, all money and U.S. Government Obligations (including the proceeds thereof)
deposited with the Trustee or other qualifying trustee (solely for purposes of
this Section and Section 1306, the Trustee and any such other trustee are
referred to collectively as the "Trustee") pursuant to Section 1304 in respect
of any Securities shall be held in trust and applied by the Trustee, in
accordance with the provisions of such Securities and this Indenture, to the
payment, either directly or through any such Paying Agent (including the Company
acting as its own Paying Agent) as the Trustee may determine, to the Holders of
such Securities, of all sums due and to become due thereon in respect of
principal and any premium and interest, but money so held in trust need not be
segregated from other funds except to the extent required by law.

                  The Company shall pay and indemnify the Trustee against any
tax, fee or other charge imposed on or assessed against the U.S. Government
Obligations deposited pursuant to Section 1304 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 Outstanding Securities.

                  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 U.S. Government Obligations held by it as provided in
Section 1304 with respect to any Securities which, in the opinion of a
nationally

                                       48
<PAGE>   54

recognized firm of independent public accountants expressed in a written
certification thereof delivered to the Trustee, are in excess of the amount
thereof that would then be required to be deposited to effect the Defeasance or
Covenant Defeasance, as the case may be, with respect to such Securities.

SECTION 1306.  Reinstatement.

                  If the Trustee or the Paying Agent is unable to apply any
money in accordance with this Article with respect to any Securities by reason
of any order or judgment of any court or governmental authority enjoining,
restraining or otherwise prohibiting such application, then the obligations
under this Indenture and such Securities from which the Company has been
discharged or released pursuant to Section 1302 or 1303 shall be revived and
reinstated as though no deposit had occurred pursuant to this Article with
respect to such Securities, until such time as the Trustee or Paying Agent is
permitted to apply all money held in trust pursuant to Section 1305 with respect
to such Securities in accordance with this Article; provided, however, that if
the Company makes any payment of principal of or any premium or interest on any
such Security following such reinstatement of its obligations, the Company shall
be subrogated to the rights (if any) of the Holders of such Securities to
receive such payment from the money so held in trust.

                            [Signature page follows.]

                                       49
<PAGE>   55

         This instrument 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 instrument.

         IN WITNESS WHEREOF, the parties hereto have caused this Indenture to be
duly executed, and their respective corporate seals to be hereunto affixed and
attested, all as of the day and year first above written.

                                       NEWFIELD EXPLORATION COMPANY

                                       By: /s/ TERRY W. RATHERT
                                          --------------------------------------
                                          Terry W. Rathert
                                          Vice President and Chief Financial
                                            Officer

                                       FIRST UNION NATIONAL BANK, as Trustee

                                       By: /s/ KEVIN M. DOBRAVA
                                          --------------------------------------
                                          Kevin M. Dobrava
                                          Vice President

                                       50

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