Document:

<PAGE>   1
                                                                     EXHIBIT 4.2

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                         YORK INTERNATIONAL CORPORATION

                                       AND

                              THE BANK OF NEW YORK,

                                   AS TRUSTEE

                                SENIOR INDENTURE

                          DATED AS OF _______ __, 200_

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<PAGE>   2

                             CROSS REFERENCE SHEET*

      Provisions of Trust Indenture Act of 1939 and Indenture to be dated as of
_________ __, 200_ between YORK INTERNATIONAL CORPORATION and THE BANK OF NEW
YORK, as Trustee:

<TABLE>
<CAPTION>

Section of the Act                    Section of Indenture
------------------                    --------------------

<S>                                   <C>
310(a)(1), (2) and (5)..............  6.9
310(a)(3) and (4)...................  Inapplicable
310(b)..............................  6.8 and 6.10(a), (b) and (d)
310(c)..............................  Inapplicable
311(a)..............................  6.13
311(b)..............................  6.13
311(c)..............................  Inapplicable
312(a)..............................  4.1 and 4.2(a)
312(b)..............................  4.2(a) and (b)(i) and (ii)
312(c)..............................  4.2(c)
313(a)..............................  4.4(a)(i), (ii), (iii), (iv), (v), (vi) and (vii)
313(a)(5)...........................  Inapplicable
313(b)(1)...........................  Inapplicable
313(b)(2)...........................  4.4(b)
313(c)..............................  4.4(c)
313(d)..............................  4.4(d)
314(a)..............................  4.3
314(b)..............................  Inapplicable
314(c)(1) and (2)...................  11.5
314(c)(3)...........................  Inapplicable
314(d)..............................  Inapplicable
314(e)..............................  11.5
314(f)..............................  Inapplicable
315(a), (c) and (d).................  6.1
315(b)..............................  5.8
315(e)..............................  5.9
316(a)(1)...........................  5.7
316(a)(2)...........................  Not required
316(a) (last sentence)..............  7.4
316(b)..............................  5.4
317(a)..............................  5.2
317(b)..............................  3.5(a)
318(a)..............................  11.7
</TABLE>

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*This Cross Reference Sheet is not part of the Indenture.

<PAGE>   3

                                TABLE OF CONTENTS
<TABLE>
<CAPTION>

                                                                            Page
                                                                            ----

                                   ARTICLE ONE
                                   DEFINITIONS

<S>                                                                         <C>
SECTION 1.1    Definitions...................................................1
  Affiliate..................................................................2
  Attributable Debt..........................................................2
  Authenticating Agent.......................................................2
  Bankruptcy Law.............................................................2
  Board of Directors.........................................................2
  Board Resolution...........................................................2
  Business Day...............................................................2
  Commission.................................................................2
  Corporate Trust Office.....................................................3
  Debt.......................................................................3
  Default....................................................................3
  Depositary.................................................................3
  Dollars....................................................................3
  $..........................................................................3
  Exchange Act...............................................................3
  Event of Default...........................................................3
  Funded Debt................................................................3
  GAAP.......................................................................3
  Global Security............................................................3
  Holder.....................................................................3
  Holder of Securities.......................................................3
  Securityholder.............................................................3
  Indenture..................................................................3
  interest...................................................................4
  Issuer.....................................................................4
  Issuer Order...............................................................4
  Lien.......................................................................4
  Officers' Certificate......................................................4
  Opinion of Counsel.........................................................4
  original issue date........................................................4
  original issue discount....................................................4
  Original Issue Discount Security...........................................5
  Outstanding................................................................5
  Periodic Offering..........................................................5
  Person.....................................................................5
  Place of Payment...........................................................6
</TABLE>

<PAGE>   4
<TABLE>
<CAPTION>

<S>                                                                         <C>
  principal..................................................................6
  principal amount...........................................................6
  Principal Property.........................................................6
  Receivable Financing Transaction...........................................6
  record date................................................................6
  Responsible Officer........................................................6
  Restricted Subsidiary......................................................6
  Sale and Lease-Back Transaction............................................6
  Securities Act.............................................................7
  Security...................................................................7
  Securities.................................................................7
  Shareholders' Equity in the Issuer and its Consolidated Subsidiaries.......7
  Stated Maturity............................................................7
  Subsidiary.................................................................7
  Trust Indenture Act of 1939................................................7
  Trustee....................................................................7
  U.S. Government Obligations................................................7
  vice president.............................................................7
  Yield to Maturity..........................................................7
</TABLE>

                                   ARTICLE TWO
                                   SECURITIES
<TABLE>
<CAPTION>

<S>            <C>                                                         <C>
SECTION 2.1    Forms Generally...............................................8
SECTION 2.2    Form of Trustee's Certificate of Authentication...............8
SECTION 2.3    Amount Unlimited, Issuable in Series..........................9
SECTION 2.4    Authentication and Delivery of Securities....................11
SECTION 2.5    Execution of Securities......................................14
SECTION 2.6    Certificate of Authentication................................14
SECTION 2.7    Denomination and Date of Securities; Payments of Interest....15
SECTION 2.8    Registration, Transfer and Exchange..........................15
SECTION 2.9    Mutilated, Defaced, Destroyed, Lost and Stolen Securities....17
SECTION 2.10   Cancellation of Securities; Disposition Thereof..............18
SECTION 2.11   Temporary Securities.........................................19
SECTION 2.12   CUSIP Numbers................................................19
</TABLE>

                                  ARTICLE THREE
                             COVENANTS OF THE ISSUER
<TABLE>
<CAPTION>

<S>            <C>                                                          <C>
SECTION 3.1    Payment of Principal and Interest............................19
SECTION 3.2    Maintenance of Office or Agency for Notices and Demands......20
SECTION 3.3    Officers' Annual Compliance Certificate Filed with the
                  Trustee...................................................20
SECTION 3.4    Corporate Existence..........................................20
SECTION 3.5    Payment of Taxes and Other Claims............................20
SECTION 3.6    Limitation on Liens..........................................20
</TABLE>
                                      -ii-

<PAGE>   5

<TABLE>
<CAPTION>

<S>                                                                        <C>
SECTION 3.7    Limitation on Sale and Lease-Back Transactions...............22
</TABLE>

                                  ARTICLE FOUR
                      SECURITYHOLDERS LISTS AND REPORTS BY
                           THE ISSUER AND THE TRUSTEE
<TABLE>
<CAPTION>

<S>            <C>                                                          <C>
SECTION 4.1    Issuer to Furnish Trustee Information as to Names and
                  Addresses of Securityholders..............................23
SECTION 4.2    Preservation and Disclosure of Securityholders Lists.........23
SECTION 4.3    Reports by the Issuer........................................25
SECTION 4.4    Reports by the Trustee.......................................25
</TABLE>

                                  ARTICLE FIVE
                   REMEDIES OF THE TRUSTEE AND SECURITYHOLDERS
                               ON EVENT OF DEFAULT
<TABLE>
<CAPTION>

<S>            <C>                                                         <C>
SECTION 5.1    Events of Default............................................27
SECTION 5.2    Payment of Securities on Default; Suit Therefor..............29
SECTION 5.3    Application of Moneys Collected by Trustee...................30
SECTION 5.4    Proceedings by Securityholders...............................31
SECTION 5.5    Proceedings by Trustee.......................................32
SECTION 5.6    Remedies Cumulative and Continuing...........................32
SECTION 5.7    Direction of Proceedings; Waiver of Defaults by Majority
                  of Securityholders........................................32
SECTION 5.8    Notice of Defaults...........................................33
SECTION 5.9    Undertaking to Pay Costs.....................................33
</TABLE>

                                   ARTICLE SIX
                             CONCERNING THE TRUSTEE
<TABLE>
<CAPTION>

<S>            <C>                                                          <C>
SECTION 6.1    Duties and Responsibilities of the Trustee; During
                  Default; Prior to Default.................................33
SECTION 6.2    Certain Rights of the Trustee................................35
SECTION 6.3    Trustee Not Responsible for Recitals, Disposition of
                  Securities or Application of Proceeds Thereof.............36
SECTION 6.4    Trustee and Agents May Hold Securities; Collections, etc.....36
SECTION 6.5    Moneys Held by Trustee.......................................36
SECTION 6.6    Compensation and Indemnification of Trustee and Its
                  Prior Claim...............................................36
SECTION 6.7    Right of Trustee to Rely on Officers' Certificate, etc.......37
SECTION 6.8    Qualification of Trustee; Conflicting Interests..............37
SECTION 6.9    Persons Eligible for Appointment as Trustee; Different
                  Trustees for Different Series.............................37
SECTION 6.10   Resignation and Removal; Appointment of Successor Trustee....38
SECTION 6.11   Acceptance of Appointment by Successor Trustee...............39
SECTION 6.12   Merger, Conversion, Consolidation or Succession to
                  Business of Trustee.......................................40
</TABLE>

                                     -iii-
<PAGE>   6

<TABLE>
<CAPTION>
<S>            <C>                                                          <C>
SECTION 6.13   Preferential Collection of Claims Against the Issuer.........41
SECTION 6.14   Appointment of Authenticating Agent..........................41
</TABLE>

                                  ARTICLE SEVEN
                         CONCERNING THE SECURITYHOLDERS
<TABLE>
<CAPTION>
<S>            <C>                                                          <C>
SECTION 7.1    Evidence of Action Taken by Securityholders..................42
SECTION 7.2    Proof of Execution of Instruments and of Holding of
                  Securities................................................42
SECTION 7.3    Holders to be Treated as Owners..............................42
SECTION 7.4    Securities Owned by Issuer Deemed Not Outstanding............43
SECTION 7.5    Right of Revocation of Action Taken..........................43
SECTION 7.6    Record Date for Consents and Waivers.........................43
</TABLE>

                                  ARTICLE EIGHT
                             SUPPLEMENTAL INDENTURES
<TABLE>
<CAPTION>
<S>            <C>                                                          <C>
SECTION 8.1    Supplemental Indentures Without Consent of
                  Securityholders...........................................44
SECTION 8.2    Supplemental Indentures with Consent of Securityholders......46
SECTION 8.3    Effect of Supplemental Indenture.............................47
SECTION 8.4    Documents to Be Given to Trustee.............................47
SECTION 8.5    Notation on Securities in Respect of Supplemental
                  Indentures................................................47
</TABLE>
                                  ARTICLE NINE
                                   SUCCESSORS
<TABLE>
<CAPTION>
<S>            <C>                                                          <C>
SECTION 9.1    When Issuer May Merge, etc...................................48
SECTION 9.2    Successor Corporation Substituted............................48
</TABLE>
                                 ARTICLE TEN
                   SATISFACTION AND DISCHARGE OF INDENTURE;
                      COVENANT DEFEASANCE; UNCLAIMED MONEYS

<TABLE>
<CAPTION>
<S>            <C>                                                          <C>
SECTION 10.1   Satisfaction and Discharge of Indenture; Covenant
                  Defeasance................................................48
SECTION 10.2   Application by Trustee of Funds Deposited for Payment of
                  Securities................................................52
SECTION 10.3   Repayment of Moneys Held by Paying Agent.....................52
SECTION 10.4   Return of Moneys Held by Trustee and Paying Agent
                  Unclaimed for Two Years...................................52
SECTION 10.5   Indemnity for U.S. Government Obligations....................52
</TABLE>
                                 ARTICLE ELEVEN
                            MISCELLANEOUS PROVISIONS

<TABLE>
<CAPTION>
<S>            <C>                                                          <C>
SECTION 11.1   Partners, Incorporators, Stockholders, Officers and
                  Directors of Issuer Exempt from Individual Liability......53
SECTION 11.2   Provisions of Indenture for the Sole Benefit of Parties
                  and Holders of Securities.................................53
</TABLE>
                                      -iv-

<PAGE>   7

<TABLE>
<CAPTION>
<S>            <C>                                                          <C>
SECTION 11.3   Successors and Assigns of Issuer Bound by Indenture..........53
SECTION 11.4   Notices and Demands on Issuer, Trustee and Holders of
                  Securities................................................53
SECTION 11.5   Officers' Certificates and Opinions of Counsel;
                  Statements to Be Contained Therein........................54
SECTION 11.6   Payments Due on Saturdays, Sundays and Holidays..............55
SECTION 11.7   Conflict of Any Provision of Indenture with Trust
                  Indenture Act of 1939.....................................55
SECTION 11.8   GOVERNING LAW................................................55
SECTION 11.9   Counterparts.................................................55
SECTION 11.10  Effect of Headings...........................................55
</TABLE>
                                 ARTICLE TWELVE
                  REDEMPTION OF SECURITIES AND SINKING FUNDS
<TABLE>
<CAPTION>
<S>            <C>                                                          <C>
SECTION 12.1   Applicability of Article.....................................55
SECTION 12.2   Notice of Redemption; Partial Redemptions....................55
SECTION 12.3   Payment of Securities Called for Redemption..................57
SECTION 12.4   Exclusion of Certain Securities from Eligibility for
                  Selection for Redemption..................................57
SECTION 12.5   Mandatory and Optional Sinking Funds.........................58
</TABLE>

                                      -v-

<PAGE>   8

      THIS SENIOR INDENTURE, dated as of _______ __, 200_ between YORK
INTERNATIONAL CORPORATION, a Delaware corporation (the "Issuer"), and THE BANK
OF NEW YORK, as trustee (the "Trustee").

                            W I T N E S S E T H :

      WHEREAS, the Issuer has duly authorized the issuance from time to time of
its unsecured debentures, notes or other evidences of indebtedness to be issued
in one or more series (the "Securities") up to such principal amount or amounts
as may from time to time be authorized in accordance with the terms of this
Indenture;

      WHEREAS, the Issuer has duly authorized the execution and delivery of this
Indenture to provide, among other things, for the authentication, delivery and
administration of the Securities; and

      WHEREAS, all things necessary to make this Indenture a valid indenture and
agreement according to its terms have been undertaken and completed;

      NOW, THEREFORE:

      In consideration of the premises and the purchases of the Securities by
the Holders (as hereinafter defined) thereof, the Issuer and the Trustee
mutually covenant and agree for the equal and proportionate benefit of the
respective Holders from time to time of the Securities as follows:

                                   ARTICLE ONE
                                   DEFINITIONS

      SECTION 1.1 Definitions. For all purposes of this Indenture and of any
indenture supplemental hereto the following terms shall have the respective
meanings specified in this Section 1.1 (except as otherwise expressly provided
herein or in any indenture supplemental hereto or unless the context otherwise
clearly requires). All other terms used in this Indenture that are defined in
the Trust Indenture Act of 1939 (as hereinafter defined), including terms
defined therein by reference to the Securities Act (as hereinafter defined),
shall have the meanings assigned to such terms in said Trust Indenture Act of
1939 and in said Securities Act as in force at the date of this Indenture
(except as otherwise expressly provided herein or in any indenture supplemental
hereto or unless the context otherwise clearly requires).

      All accounting terms used herein and not expressly defined shall have the
meanings assigned to such terms in accordance with GAAP (as hereinafter
defined).

      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. The expressions "date of this Indenture", "date
hereof", "date as of which this Indenture is dated" and "date of execution and
delivery of this Indenture" and other expressions of similar import refer to

<PAGE>   9

the effective date of the original execution and delivery of this Indenture,
viz., as of _______ __, 200_.

      The terms defined in this Article have the meanings assigned to them in
this Article and include the plural as well as the singular.

      "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.

      "Attributable Debt" means, with respect to any particular series of
Securities and as of any particular time, the present value, discounted at a
rate per annum equal to the interest rate borne by the Securities of such series
(or, in the case of Original Issue Discount Securities, the Yield to Maturity),
of the obligation of a lessee for rental payments (not including amounts payable
by the lessee for maintenance, property taxes and insurance) during the
remaining term of any lease (including any period for which such lease has been
extended or may, at the option of the lessor, be extended).

      "Authenticating Agent" shall have the meaning set forth in Section 6.14.

      "Bankruptcy Law" means Title 11, United States Code or any similar Federal
or state law for the relief of debtors.

      "Board of Directors" means the board of directors of the Issuer.

      "Board Resolution" means one or more resolutions, certified by the
secretary or an assistant secretary of the Issuer to have been duly adopted or
consented to by the Board of Directors and to be in full force and effect, and
delivered to the Trustee.

      "Business Day" means, with respect to any Security, unless otherwise
specified in a Board Resolution and an Officers' Certificate with respect to a
particular series of Securities, a day that (a) in the Place of Payment (or in
any of the Places of Payment, if more than one) in which amounts are payable, as
specified in the form of such Security, and (b) in the city in which the
Corporate Trust Office is located, is not a day on which banking institutions
are authorized or required by law or regulation 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 and delivery of this Indenture such Commission is not existing and
performing the duties now assigned to it under the Trust Indenture Act of 1939,
then the body performing such duties on such date.

                                      -2-
<PAGE>   10

      "Corporate Trust Office" means the office of the Trustee at which the
corporate trust business of the Trustee shall, at any particular time, be
principally administered, which office is, at the date as of which this
Indenture is dated, located in New York, New York.

      "Debt" means indebtedness for borrowed money.

      "Default" means any event which is, or after the giving of notice or
passage of time or both would be, an Event of Default.

      "Depositary" means, with respect to the Securities of any series issuable
or issued in the form of one or more Global Securities, the Person designated as
Depositary by the Issuer pursuant to Section 2.3 until a successor Depositary
shall have become such pursuant to the applicable provisions of this Indenture,
and thereafter "Depositary" shall mean or include each Person who is then a
Depositary hereunder, and, if at any time there is more than one such Person,
"Depositary" as used with respect to the Securities of any such series shall
mean the Depositary with respect to the Global Securities of such series.

      "Dollars" and the sign "$" means the coin and currency of the United
States of America as at the time of payment is legal tender for the payment of
public and private debts.

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

      "Event of Default" means any event or condition specified as such in
Section 5.1.

      "Funded Debt" means Debt which by its terms matures at, or is extendible
or renewable at the option of the obligor to, a date more than twelve months
after the date of the creation of such Debt, including but not limited to,
outstanding revolving credit loans.

      "GAAP" means generally accepted accounting principles set forth in the
opinions and pronouncements of the Accounting Principles Board of the American
Institute of Certified Public Accountants and statements and pronouncements of
the Financial Accounting Standards Board or in such other statements by such
other entity as may be approved by a significant segment of the accounting
profession, consistently applied, which are applicable to the circumstances as
of the date of determination.

      "Global Security" means a Security evidencing all or a part of a series of
Securities issued to the Depositary for such series in accordance with Section
2.3 and bearing the legend prescribed in Section 2.4.

      "Holder", "Holder of Securities", "Securityholder" or other similar terms
mean, in the case of any Security, the Person in whose name such Security is
registered in the security register kept by the Issuer for that purpose in
accordance with the terms hereof.

      "Indenture" means this instrument as originally executed and delivered or,
if amended or supplemented as herein provided, as so amended or supplemented or
both, including, for all purposes of this instrument and any such supplement,
the provisions of the Trust Indenture Act

                                      -3-
<PAGE>   11

of 1939 that are deemed to be a part of and govern this instrument and any such
supplement, respectively, and shall include the forms and terms of particular
series of Securities established as contemplated hereunder.

      "interest" means, when used with respect to non-interest bearing
Securities (including, without limitation, any Original Issue Discount Security
that by its terms bears interest only after maturity or upon default in any
other payment due on such Security), interest payable after maturity (whether at
stated maturity, upon acceleration or redemption or otherwise) or after the
date, if any, on which the Issuer becomes obligated to acquire a Security,
whether upon conversion, by purchase or otherwise.

      "Issuer" means York International Corporation, a Delaware corporation,
and, subject to Article Nine, its successors and assigns.

      "Issuer Order" means a written statement, request or order of the Issuer
which is signed in its name by the chairman of the Board of Directors, the
president or any vice president of the Issuer, and delivered to the Trustee.

      "Lien" means any mortgage, lien, pledge, security interest, conditional
sale or other title retention agreement or other security interest or
encumbrance of any kind (including any agreement to give any security interest).

      "Officers' Certificate", when used with respect to the Issuer, means a
certificate signed by the chairman of the Board of Directors, the president, or
any vice president and by the treasurer, any assistant treasurer, the
controller, any assistant controller, the secretary or any assistant secretary
of the Issuer. Each such certificate shall include the statements provided for
in Section 11.5 if and to the extent required by the provisions of such Section
11.5. One of the officers signing an Officers' Certificate given pursuant to
Section 4.3 shall be the principal executive, financial or accounting officer of
the Issuer.

      "Opinion of Counsel" means an opinion in writing signed by the chief
counsel of the Issuer or by such other legal counsel who may be an employee of
or counsel to the Issuer and who shall be reasonably satisfactory to the
Trustee. Each such opinion shall include the statements provided for in Section
11.5, if and to the extent required by the provisions of such Section 11.5.

      "original issue date" of any Security (or portion thereof) means the
earlier of (a) the date of such Security or (b) the date of any Security (or
portion thereof) for which such Security was issued (directly or indirectly) on
registration of transfer, exchange or substitution.

      "original issue discount" of any debt security, including any Original
Issue Discount Security, means the difference between the principal amount of
such debt security and the initial issue price of such debt security (as set
forth in the case of an Original Issue Discount Security on the face of such
Security).

                                      -4-
<PAGE>   12

      "Original Issue Discount Security" means any Security that provides for an
amount less than the principal amount thereof to be due and payable upon a
declaration of acceleration of the maturity thereof pursuant to Article Five.

      "Outstanding", when used with reference to Securities, shall, subject to
the provisions of Section 7.4, mean, as of any particular time, all Securities
authenticated and delivered by the Trustee under this Indenture, except:

        (a)   Securities theretofore cancelled by the Trustee or delivered to
      the Trustee for cancellation;

        (b)   Securities (other than Securities of any series as to which the
      provisions of Article Ten hereof shall not be applicable), or portions
      thereof, for the payment or redemption of which moneys or U.S.
      Government Obligations (as provided for in Section 10.1) in the
      necessary amount shall have been deposited in trust with the Trustee or
      with any paying agent (other than the Issuer) or shall have been set
      aside, segregated and held in trust by the Issuer for the Holders of
      such Securities (if the Issuer shall act as its own paying agent),
      provided that, if such Securities, or portions thereof, are to be
      redeemed prior to the maturity thereof, notice of such redemption shall
      have been given as herein provided, or provision satisfactory to the
      Trustee shall have been made for giving such notice; and

        (c)   Securities which shall have been paid or in substitution for which
      other Securities shall have been authenticated and delivered pursuant to
      the terms of Section 2.9 (except with respect to any such Security as to
      which proof satisfactory to the Trustee is presented that such Security
      is held by a Person in whose hands such Security is a legal, valid and
      binding obligation of the Issuer).

      In determining whether the Holders of the requisite aggregate principal
amount of Outstanding Securities of any or all series have given any request,
demand, authorization, direction, notice, consent or waiver hereunder, the
principal amount of an Original Issue Discount Security that shall be deemed to
be Outstanding for such purposes shall be the portion of the principal amount
thereof that would be due and payable as of the date of such determination (as
certified by the Issuer to the Trustee) upon a declaration of acceleration of
the maturity thereof pursuant to Article Five.

      "Periodic Offering" means an offering of Securities of a series from time
to time, the specific terms of which Securities, including, without limitation,
the rate or rates of interest, if any, thereon, the stated maturity or
maturities thereof and the redemption provisions, if any, with respect thereto,
are to be determined by the Issuer or its agents upon the issuance of such
Securities.

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

                                      -5-
<PAGE>   13

      "Place of Payment", when used with respect to the Securities of any
series, means the place or places where the principal of and interest, if any,
on the Securities of such series are payable as determined in accordance with
Section 2.3.

      "principal" of a debt security, including any Security, means the amount
(including, without limitation, if and to the extent applicable, any premium
and, in the case of an Original Issue Discount Security, any accrued original
issue discount, but excluding interest) that is payable with respect to such
debt security as of any date and for any purpose (including, without limitation,
in connection with any sinking fund, if any, upon any redemption at the option
of the Issuer, upon any purchase or exchange at the option of the Issuer or the
holder of such debt security and upon any acceleration of the maturity of such
debt security).

      "principal amount" of a debt security, including any Security, means the
principal amount as set forth on the face of such debt security.

      "Principal Property" means all property and assets of the Issuer and its
Restricted Subsidiaries considered as Property, Plan and Equipment for purposes
of the Issuer's consolidated balance sheet.

      "Receivable Financing Transaction" means any transaction or series of
transactions involving a sale for cash or notes of accounts receivable, without
recourse based upon the collectibility of the receivables sold, by the Issuer or
any Restricted Subsidiary to a wholly owned Restricted Subsidiary created solely
for the purpose of facilitating the transaction, and a subsequent sale or pledge
of those accounts receivable by that Restricted Subsidiary, in each case without
any guarantee of the collectibility of such receivables or any indebtedness
secured thereby or payable therefrom by the Issuer or any Restricted Subsidiary
other than such Restricted Subsidiary.

      "record date" shall have the meaning set forth in Section 2.7.

      "Responsible Officer", when used with respect to the Trustee, means any
officer of the Trustee with direct responsibility for the administration of this
Indenture.

      "Restricted Subsidiary" means any Subsidiary organized and existing under
the laws of the United States of America or Canada, including any branch of any
such Subsidiary whether such branch is located in the United States of America
or Canada, or any other country.

      "Sale and Lease-Back Transaction" means an arrangement with any Person
providing for the leasing by the Issuer or any Restricted Subsidiary of any
Principal Property, title to which property has been or is to be sold or
transferred by the Issuer or such Restricted Subsidiary to such Person;
provided, however, that the term Sale and Lease-Back Transaction shall not
include any arrangement with the United States of America, any of its
territories or possessions, or any State thereof, or the District of Columbia,
or any department, agency, instrumentality or political subdivision of any
thereof, or any department, agency or instrumentality of any such political
subdivision, entered into for the purpose of financing all or any part of the
purchase price or the cost of constructing or improving the Principal Property
subject to such arrangement.

                                      -6-
<PAGE>   14

      "Securities Act" means the Securities Act of 1933, as amended.

      "Security" or "Securities" has the meaning stated in the first recital of
this Indenture or, as the case may be, Securities that have been authenticated
and delivered pursuant to this Indenture.

      "Shareholders' Equity in the Issuer and its Consolidated Subsidiaries"
means the consolidated capital stock, capital surplus, if any, and retained
earnings of the Issuer and its consolidated Subsidiaries, after deducting the
cost of shares of the Issuer held in its treasury.

      "Stated Maturity", when used with respect to any Security or any
installment of interest thereon, shall mean the date specified in such Security
as the fixed date on which the principal of such Security or such installment of
interest is due and payable.

      "Subsidiary" means, with respect to any Person, any corporation or other
entity of which a majority of the total voting power of the voting stock
outstanding is, or other ownership interests having voting power under ordinary
circumstances with the power to elect a majority of the board of directors or
other Persons performing similar functions are, at the time directly or
indirectly owned by such Person. Unless otherwise indicated, "Subsidiary" shall
refer only to Subsidiaries of the Issuer.

      "Trust Indenture Act of 1939" (except as otherwise provided in Sections
8.1 and 8.2) means the Trust Indenture Act of 1939, as amended, as in force at
the date as of which this Indenture is originally executed.

      "Trustee" means the Person identified as "Trustee" in the first paragraph
hereof and, subject to the provisions of Article Six, shall also include any
successor trustee. "Trustee" shall also 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 such series.

      "U.S. Government Obligations" shall have the meaning set forth in
Section 10.1(B).

      "vice president", when used with respect to the Issuer or the Trustee,
means any vice president, regardless of whether designated by a number or a word
or words added before or after the title "vice president".

      "Yield to Maturity" means the yield to maturity on a series of Securities,
calculated at the time of issuance of such series, or, if applicable, at the
most recent redetermination of interest on such series, and calculated in
accordance with generally accepted financial practice or as otherwise provided
in the terms of such series of Securities.

                                      -7-
<PAGE>   15

                                   ARTICLE TWO
                                   SECURITIES

      SECTION 2.1 Forms Generally. The Securities of each series shall be
substantially in such form (not inconsistent with this Indenture) as shall be
established by or pursuant to one or more Board Resolutions (as set forth in a
Board Resolution or, to the extent established pursuant to rather than set forth
in a Board Resolution, an Officers' Certificate detailing such establishment) 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 imprinted or otherwise
reproduced thereon such legend or legends or endorsements, not inconsistent with
the provisions of this Indenture, as may be required to comply with any law or
with any rules or regulations pursuant thereto, or with any rules of any
securities exchange or to conform to general usage, all as may be determined by
the officers executing such Securities, as evidenced by their execution 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 2.2 Form of Trustee's Certificate of Authentication. The Trustee's
certificate of authentication on all Securities shall be substantially as
follows:

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

                              THE BANK OF NEW YORK, as Trustee

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

      If at any time there shall be an Authenticating Agent appointed with
respect to any series of Securities, then the Securities of such series shall
bear, in addition to the Trustee's certificate of authentication, an alternate
Certificate of Authentication which shall be substantially as follows:

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

                                      -8-
<PAGE>   16

                              THE BANK OF NEW YORK, as Trustee

                              By
                                ----------------------------------------------
                                    as Authenticating Agent

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

      SECTION 2.3 Amount Unlimited, Issuable in Series. The aggregate principal
amount of Securities which may be authenticated and delivered under this
Indenture is unlimited.

      The Securities may be issued in one or more series and the Securities of
each such series shall rank equally and pari passu with the Securities of each
other series and with all other unsecured and unsubordinated Debt of the Issuer.
There shall be established in or pursuant to one or more Board Resolutions (and,
to the extent established pursuant to rather than set forth in a Board
Resolution, in an Officers' Certificate detailing such establishment) or
established in one or more indentures supplemental hereto, prior to the initial
issuance of Securities of any series:

            (1)   the designation of the Securities of the series, which shall
      distinguish the Securities of such series from the Securities of all
      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 2.8, 2.9, 2.11, 8.5 or 12.3);

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

            (4)   the rate or rates at which the Securities of the series shall
      bear interest, if any, the date or dates from which any such interest
      shall accrue, on which any such interest shall be payable and on which a
      record shall be taken for the determination of Holders to whom any such
      interest is payable or the method by which such rate or rates or date or
      dates shall be determined or both;

            (5)   the place or places where and the manner in which the
      principal of, premium, if any, and interest, if any, on Securities of the
      series shall be payable (if other than as provided in Section 3.2) and the
      office or agency for the Securities of the series maintained by the Issuer
      pursuant to Section 3.2;

            (6)   the right, if any, of the Issuer to redeem, purchase or repay
      Securities of the series, in whole or in part, at its option and the
      period or periods within which, the price or prices (or the method by
      which such price or prices shall be determined or both) at which, the form
      or method of payment therefor if other than in cash and any terms and
      conditions upon which, and the manner in which (if different from the
      provisions of

                                      -9-
<PAGE>   17

    Article Twelve), Securities of the series may be so redeemed, purchased or
    repaid, in whole or in part, pursuant to any sinking fund or otherwise;

            (7)   the obligation, if any, of the Issuer to redeem, purchase or
      repay Securities of the series in whole or in part pursuant to any
      mandatory redemption, sinking fund or analogous provisions or at the
      option of a Holder thereof and the period or periods within which the
      price or prices (or the method by which such price or prices shall be
      determined or both) at which, the form or method of payment therefor if
      other than in cash and any terms and conditions upon which, and the manner
      in which (if different from the provisions of Article Twelve), Securities
      of the series shall be redeemed, purchased or repaid, in whole or in part,
      pursuant to such obligation;

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

            (9)   if other than the principal amount thereof, the portion of the
      principal amount of Securities of the series which shall be payable upon
      acceleration of the maturity thereof;

           (10)   whether Securities of the series will be issuable as Global
      Securities;

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

           (12)   any trustees, depositaries, authenticating or paying agents,
      transfer agents or registrars or any other agents with respect to the
      Securities of such series;

           (13)   any deleted, modified or additional events of default or
      remedies or any additional covenants with respect to the Securities of
      such series;

           (14)   whether the provisions of Section 10.1(C) will be applicable
      to Securities of such series;

           (15)  any provision relating to the issuance of Securities of such
      series at an original issue discount (including, without limitation, the
      issue price thereof, the rate or rates at which such original issue
      discount shall accrete, if any, and the date or dates from or to which or
      period or periods during which such original issue discount shall accrete
      at such rate or rates);

           (16)  if other than Dollars, the foreign currency in which payment of
      the principal of, premium, if any, and interest, if any, on the Securities
      of such series shall be payable;

           (17)  if any entity other than The Bank of New York is to act as
      Trustee for the Securities of such series, the name and Corporate Trust
      Office of such Trustee;

                                      -10-
<PAGE>   18

           (18)  if the amounts of payments of principal of, premium, if any,
      and interest, if any, on the Securities of such series are to be
      determined with reference to an index, the manner in which such amounts
      shall be determined; and

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

      All Securities of any one series shall be substantially identical, except
as to denomination and except as may otherwise be provided by or pursuant to the
Board Resolution or Officers' Certificate referred to above or as set forth in
any such indenture supplemental hereto. All Securities of any one series need
not be issued at the same time and may be issued from time to time, consistent
with the terms of this Indenture, if so provided by or pursuant to such Board
Resolution, such Officers' Certificate or in any such indenture supplemental
hereto.

      Any such Board Resolution or Officers' Certificate referred to above with
respect to Securities of any series filed with the Trustee on or before the
initial issuance of the Securities of such series shall be incorporated herein
by reference with respect to Securities of such series and shall thereafter be
deemed to be a part of the Indenture for all purposes relating to Securities of
such series as fully as if such Board Resolution or Officers' Certificate were
set forth herein in full.

      SECTION 2.4 Authentication and Delivery of Securities. The Issuer may
deliver Securities of any series executed by the Issuer to the Trustee for
authentication together with the applicable documents referred to below in this
Section 2.4, and the Trustee shall thereupon authenticate and deliver such
Securities to, or upon the order of, the Issuer (contained in the Issuer Order
referred to below in this Section 2.4) or pursuant to such procedures acceptable
to the Trustee and to such recipients as may be specified from time to time by
an Issuer Order. The maturity date, original issue date, interest rate, if any,
and any other terms of the Securities of such series shall be determined by or
pursuant to such Issuer Order and procedures. If provided for in such procedures
and agreed to by the Trustee, such Issuer Order may authorize authentication and
delivery pursuant to oral instructions from the Issuer or its duly authorized
agent, which instructions shall be promptly confirmed in writing. In
authenticating the Securities of such series and accepting the additional
responsibilities under this Indenture in relation to such Securities, the
Trustee shall be entitled to receive (in the case of subparagraphs (2), (3) and
(4) below only at or before the time of the first request of the Issuer to the
Trustee to authenticate Securities of such series) and (subject to Section 6.1)
shall be fully protected in relying upon, unless and until such documents have
been superseded or revoked:

      (1)   an Issuer Order requesting such authentication and setting forth
    delivery instructions if the Securities of such series are not to be
    delivered to the Issuer, provided that, with respect to Securities of a
    series subject to a Periodic Offering, (a) such Issuer Order may be
    delivered by the Issuer to the Trustee prior to the delivery to the Trustee
    of such Securities for authentication and delivery, (b) the Trustee shall
    authenticate and deliver Securities of such series for original issue from
    time to time, in an aggregate principal amount not exceeding the aggregate
    principal amount established for such

                                      -11-
<PAGE>   19

    series, pursuant to an Issuer Order or pursuant to procedures acceptable to
    the Trustee as may be specified from time to time by an Issuer Order, (c)
    the maturity date or dates, original issue date or dates, interest rate or
    rates, if any, and any other terms of Securities of such series shall be
    determined by an Issuer Order or pursuant to such procedures, (d) if
    provided for in such procedures, such Issuer Order may authorize
    authentication and delivery pursuant to oral or electronic instructions from
    the Issuer or its duly authorized agent or agents, which oral instructions
    shall be promptly confirmed in writing and (e) after the original issuance
    of the first Security of such series to be issued, any separate request by
    the Issuer that the Trustee authenticate Securities of such series for
    original issuance will be deemed to be a certification by the Issuer that it
    is in compliance with all conditions precedent provided for in this
    Indenture relating to the authentication and delivery of such Securities;
    (2) the Board Resolution, Officers' Certificate or executed supplemental
    indenture referred to in Sections 2.1 and 2.3 by or pursuant to which the
    forms and terms of the Securities of such series were established;

      (3)   an Officers' Certificate setting forth the form or forms and terms
    of the Securities, stating that the form or forms and terms of the
    Securities have been established pursuant to Sections 2.1 and 2.3 and comply
    with this Indenture and covering such other matters as the Trustee may
    reasonably request; and

      (4)   at the option of the Issuer, either an Opinion of Counsel, or a
    letter from legal counsel addressed to the Trustee permitting it to rely on
    an Opinion of Counsel, substantially to the effect that:

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

                  (b) in the case of an underwritten offering, the terms of the
            Securities of such series have been duly authorized and established
            in conformity with the provisions of this Indenture, and, in the
            case of an offering that is not underwritten, certain terms of the
            Securities of such series have been established pursuant to a Board
            Resolution, an Officers' Certificate or a supplemental indenture in
            accordance with this Indenture, and when such other terms as are to
            be established pursuant to procedures set forth in an Issuer Order
            shall have been established, all such terms will have been duly
            authorized by the Issuer and will have been established in
            conformity with the provisions of this Indenture;

                  (c) when the Securities of such series have been executed by
            the Issuer and authenticated by the Trustee in accordance with the
            provisions of this Indenture and delivered to and duly paid for by
            the purchasers thereof, they will have been duly issued under this
            Indenture and will be valid and legally binding obligations of the
            Issuer, enforceable in accordance with their respective terms, and
            will be entitled to the benefits of this Indenture; and

                                      -12-
<PAGE>   20

                  (d) the execution and delivery by the Issuer of, and the
            performance by the Issuer of its obligations under, the Securities
            of such series will not contravene any provision of applicable law
            or the articles of incorporation or bylaws of the Issuer or any
            agreement or other instrument binding upon the Issuer or any of its
            Subsidiaries that is material to the Issuer and its Subsidiaries,
            considered as one enterprise, or, to such counsel's knowledge after
            the inquiry indicated therein, any judgment, order or decree of any
            governmental agency or any court having jurisdiction over the Issuer
            or any Subsidiary, and no consent, approval or authorization of any
            governmental body or agency is required for the performance by the
            Issuer of its obligations under the Securities, except such as are
            specified and have been obtained and such as may be required by the
            securities or blue sky laws of the various states in connection with
            the offer and sale of the Securities.

      In addition, if the authentication and delivery relates to a new series of
Securities created by an indenture supplemental hereto, such Opinion of Counsel
shall also state that all laws and requirements with respect to the form and
execution by the Issuer of the supplemental indenture with respect to the series
of Securities have been complied with, the Issuer has corporate power to execute
and deliver any such supplemental indenture and has taken all necessary
corporate action for those purposes and any such supplemental indenture has been
executed and delivered and constitutes the legal, valid and binding obligation
of the Issuer enforceable in accordance with its terms (subject, as to
enforcement of remedies, to applicable bankruptcy, reorganization, insolvency,
moratorium or other laws and legal principles affecting creditors' rights
generally from time to time in effect and to general equitable principles
whether applied in an action at law or in equity).

      In rendering such opinions, such counsel may qualify any opinions as to
enforceability by stating that such enforceability may be limited by bankruptcy,
insolvency, reorganization, liquidation, moratorium and other similar laws
affecting the rights and remedies of creditors and is subject to general
principles of equity (regardless of whether such enforceability is considered in
a proceeding in equity or at law). Such counsel may rely, as to all matters
governed by the laws of jurisdictions other than the State of Delaware and the
federal law of the United States, upon opinions of other counsel (copies of
which shall be delivered to the Trustee), who shall be counsel reasonably
satisfactory to the Trustee, in which case the opinion shall state that such
counsel believes that both such counsel and the Trustee are entitled so to rely.
Such counsel may also state that, insofar as such opinion involves factual
matters, such counsel has relied, to the extent such counsel deems proper, upon
certificates of officers of the Issuer and its Subsidiaries and certificates of
public officials.

      The Trustee shall have the right to decline to authenticate and deliver
any Securities of any series under this Section 2.4 if the Trustee, being
advised by counsel, determines that such action may not lawfully be taken by the
Issuer or if the Trustee in good faith by its board of directors or board of
trustees, executive committee or a trust committee of directors or trustees or
Responsible Officers shall determine that such action would expose the Trustee
to personal liability to existing Holders or would adversely affect the
Trustee's own rights, duties or immunities under the Securities, this Indenture
or otherwise.

                                      -13-
<PAGE>   21

      If the Issuer shall establish pursuant to Section 2.3 that the Securities
of a series are to be issued in the form of one or more Global Securities, then
the Issuer shall execute and the Trustee shall, in accordance with this Section
2.4 and the Issuer Order with respect to such series, authenticate and deliver
one or more Global Securities that (i) shall represent and shall be denominated
in an amount equal to the aggregate principal amount of all of the Securities of
such series to be issued in the form of Global Securities and not yet cancelled,
(ii) shall be registered in the name of the Depositary for such Global Security
or Securities or the nominee of such Depositary, (iii) shall be delivered by the
Trustee to such Depositary or pursuant to such Depositary's instructions, and
(iv) shall bear a legend substantially to the following effect: "Unless and
until it is exchanged in whole or in part for Securities in definitive
registered form, this Security may not be transferred except as a whole by the
Depositary to the nominee of the Depositary or by a nominee of the Depositary to
the Depositary or another nominee of the Depositary or by the Depositary or any
such nominee to a successor Depositary or a nominee of such successor
Depositary."

      Each Depositary designated pursuant to Section 2.3 must, at the time of
its designation and at all times while it serves as Depositary, be a clearing
agency registered under the Securities Exchange Act of 1934, as amended, and any
other applicable statute or regulation.

      SECTION 2.5 Execution of Securities. The Securities shall be signed on
behalf of the Issuer by the chairman of the Board of Directors, the president,
any vice president or the treasurer of the Issuer, under its corporate seal
which may, but need not, be attested by its secretary or one of its assistant
secretaries. Such signatures may be the manual or facsimile signatures of the
present or any future such officers. The seal of the Issuer may be in the form
of a facsimile thereof and may be impressed, affixed, imprinted or otherwise
reproduced on the Securities. Typographical and other minor errors or defects in
any such reproduction of the seal or any such signature shall not affect the
validity or enforceability of any Security that has been duly authenticated and
delivered by the Trustee.

      In case any officer of the Issuer who shall have signed any of the
Securities shall cease to be such officer before the Security so signed shall be
authenticated and delivered by the Trustee or disposed of by the Issuer, such
Security nevertheless may be authenticated and delivered or disposed of as
though the person who signed such Security had not ceased to be such officer of
the Issuer; and any Security may be signed on behalf of the Issuer by such
persons as, at the actual date of the execution of such Security, shall be the
proper officers of the Issuer, although at the date of the execution and
delivery of this Indenture any such person was not such an officer.

      SECTION 2.6 Certificate of Authentication. Only such Securities as shall
bear thereon a certificate of authentication substantially in the form
hereinbefore recited, executed by the Trustee by the manual signature of one of
its authorized signatories, or its Authenticating Agent, shall be entitled to
the benefits of this Indenture or be valid or obligatory for any purpose. The
execution of such certificate by the Trustee or its Authenticating Agent upon
any Security executed by the Issuer shall be conclusive evidence that the
Security so authenticated has been duly authenticated and delivered hereunder
and that the Holder is entitled to the benefits of this

                                      -14-
<PAGE>   22

Indenture. Each reference in this Indenture to authentication by the Trustee
includes authentication by an agent appointed pursuant to Section 6.14.

      SECTION 2.7  Denomination and Date of Securities; Payments of Interest.
The Securities of each series shall be issuable in registered form in
denominations established as contemplated by Section 2.3 or, with respect to the
Securities of any series, if not so established, in denominations of $1,000 and
any integral multiple thereof. The Securities of each series shall be numbered,
lettered or otherwise distinguished in such manner or in accordance with such
plan as the officers of the Issuer executing the same may determine with the
approval of the Trustee, as evidenced by the execution and authentication
thereof.

      Each Security shall be dated the date of its authentication. The
Securities of each series shall bear interest, if any, from the date of its
authentication, and such interest, if any, shall be payable on the dates,
established as contemplated by Section 2.3.

      The Person in whose name any Security of any series is registered at the
close of business on any record date applicable to a particular series with
respect to any interest payment date for such series shall be entitled to
receive the interest, if any, payable on such interest payment date
notwithstanding any transfer or exchange of such Security subsequent to the
record date and prior to such interest payment date, except if and to the extent
the Issuer shall default in the payment of the interest due on such interest
payment date for such series, in which case such defaulted interest shall be
paid to the Persons in whose names Outstanding Securities for such series are
registered (a) at the close of business on a subsequent record date (which shall
be not less than five Business Days prior to the date of payment of such
defaulted interest) established by notice given by mail by or on behalf of the
Issuer to the Holders of Securities not less than 15 days preceding such
subsequent record date or (b) as determined by such other procedure as is
mutually acceptable to the Issuer and the Trustee. The term "record date" as
used with respect to any interest payment date (except a date for payment of
defaulted interest) for the Securities of any series shall mean the date
specified as such in the terms of the Securities of such series established as
contemplated by Section 2.3, or, if no such date is so established, if such
interest payment date is the first day of a calendar month, the fifteenth day of
the next preceding calendar month or, if such interest payment date is the
fifteenth day of a calendar month, the first day of such calendar month, whether
or not such record date is a Business Day.

      SECTION 2.8 Registration, Transfer and Exchange. The Issuer will keep at
each office or agency to be maintained for the purpose as provided in Section
3.2 for each series of Securities a register or registers in which, subject to
such reasonable regulations as it may prescribe, it will provide for the
registration of Securities of each series and the registration of transfer of
Securities of such series. Each such register shall be in written form in the
English language or in any other form capable of being converted into such form
within a reasonable time. At all reasonable times such register or registers
shall be open for inspection and available for copying by the Trustee.

      Upon due presentation for registration of transfer of any Security of any
series at any such office or agency to be maintained for the purpose as provided
in Section 3.2, the Issuer shall

                                      -15-
<PAGE>   23

execute and the Trustee shall authenticate and deliver in the name of the
transferee or transferees a new Security or Securities of the same series,
maturity date, interest rate, if any, and original issue date in authorized
denominations for a like aggregate principal amount.

      All Securities presented for registration of transfer shall (if so
required by the Issuer or the Trustee) be duly endorsed by, or be accompanied by
a written instrument or instruments of transfer in form satisfactory to the
Issuer and the Trustee duly executed by, the Holder or his attorney duly
authorized in writing.

      At the option of the Holder thereof, Securities of any series (other than
a Global Security, except as set forth below) may be exchanged for a Security or
Securities of such series having authorized denominations and an equal aggregate
principal amount, upon surrender of such Securities to be exchanged at the
agency of the Issuer that shall be maintained for such purpose in accordance
with Section 3.2. All Securities surrendered upon any exchange or registration
of transfer provided for in this Indenture shall be promptly cancelled and
returned to the Issuer.

      The Issuer 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 of Securities. No service charge shall be made for any
such transaction or for any exchange of Securities of any series as contemplated
by the immediately preceding paragraph.

      The Issuer shall not be required to exchange or register a transfer of (a)
any Securities of any series for a period of 15 days next preceding the first
mailing or publication of notice of redemption of Securities of such series to
be redeemed, (b) any Securities selected, called or being called for redemption,
in whole or in part, except, in the case of any Security to be redeemed in part,
the portion thereof not so to be redeemed or (c) any Security if the Holder
thereof has exercised his right, if any, to require the Issuer to repurchase
such Security in whole or in part, except the portion of such Security not
required to be repurchased.

      Notwithstanding any other provision of this Section 2.8, unless and until
it is exchanged in whole or in part for Securities in definitive registered
form, a Global Security representing all or a part of the Securities of a series
may not be transferred except as a whole by the Depositary for such series to a
nominee of such Depositary or by a nominee of such Depositary to such Depositary
or another nominee of such Depositary or by such Depositary or any such nominee
to a successor Depositary for such series or a nominee of such successor
Depositary.

      If at any time the Depositary for any Securities of a series represented
by one or more Global Securities notifies the Issuer that it is unwilling or
unable to continue as Depositary for such Securities or if at any time the
Depositary for such Securities shall no longer be eligible under Section 2.4,
the Issuer shall appoint a successor Depositary with respect to such Securities.
If a successor Depositary for such Securities is not appointed by the Issuer
within 90 days after the Issuer receives such notice or becomes aware of such
ineligibility, the Issuer's election pursuant to Section 2.3 that such
Securities be represented by one or more Global Securities shall no longer be
effective and the Issuer shall execute, and the Trustee, upon receipt of an
Issuer Order for the authentication and delivery of definitive Securities of
such series, will authenticate and deliver, Securities of such series in
definitive registered form, in any authorized

                                      -16-
<PAGE>   24

denominations, in an aggregate principal amount equal to the principal amount of
the Global Security or Securities representing such Securities in exchange for
such Global Security or Securities.

      The Issuer may at any time and in its sole discretion determine that the
Securities of any series issued in the form of one or more Global Securities
shall no longer be represented by a Global Security or Securities. In such event
the Issuer shall execute, and the Trustee, upon receipt of an Issuer Order for
the authentication and delivery of definitive Securities of such series, shall
authenticate and deliver, Securities of such series in definitive registered
form, in any authorized denominations, in an aggregate principal amount equal to
the principal amount of the Global Security or Securities representing such
Securities, in exchange for such Global Security or Securities.

      If specified by the Issuer pursuant to Section 2.3 with respect to
Securities represented by a Global Security, the Depositary for such Global
Security may surrender such Global Security in exchange in whole or in part for
Securities of the same series in definitive registered form on such terms as are
acceptable to the Issuer and such Depositary. Thereupon, the Issuer shall
execute, and the Trustee shall authenticate and deliver, without service charge,

      (i)   to the Person specified by such Depositary, a new Security or
    Securities of the same series, of any authorized denominations as requested
    by such Person, in an aggregate principal amount equal to and in exchange
    for such Person's beneficial interest in the Global Security; and

     (ii)  to such Depositary a new Global Security in a denomination equal to
    the difference, if any, between the principal amount of the surrendered
    Global Security and the aggregate principal amount of Securities
    authenticated and delivered pursuant to clause (i) above.

      Upon the exchange of a Global Security for Securities in definitive
registered form in authorized denominations, such Global Security shall be
cancelled by the Trustee or an agent of the Issuer or the Trustee. Securities in
definitive registered form issued in exchange for a Global Security pursuant to
this Section 2.8 shall be registered in such names and in such authorized
denominations as the Depositary for such Global Security, pursuant to
instructions from its direct or indirect participants or otherwise, shall
instruct the Trustee or an agent of the Trustee or the Issuer or an agent of the
Issuer. The Trustee or such agent shall deliver at its office such Securities to
or as directed by the Persons in whose names such Securities are so registered.

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

      SECTION 2.9 Mutilated, Defaced, Destroyed, Lost and Stolen Securities. In
case any temporary or definitive Security shall become mutilated, defaced or be
destroyed, lost or stolen, the Issuer in its discretion may execute, and upon
the written request of any officer of the Issuer,

                                      -17-
<PAGE>   25

the Trustee shall authenticate and deliver, a new Security of the same series,
maturity date, interest rate, if any, and original issue date, bearing a number
or other distinguishing symbol not contemporaneously outstanding, in exchange
and substitution for the mutilated or defaced Security, or in lieu of and in
substitution for the Security so destroyed, lost or stolen. In every case the
applicant for a substitute Security shall furnish to the Issuer and to the
Trustee and any agent of the Issuer or the Trustee such security or indemnity as
may be required by the Trustee or the Issuer or any such agent to indemnify and
defend and to save each of the Trustee and the Issuer and any such agent
harmless and, in every case of destruction, loss or theft, evidence to their
satisfaction of the destruction, loss or theft of such Security and of the
ownership thereof and in the case of mutilation or defacement, shall surrender
the Security to the Trustee or such agent.

      Upon the issuance of any substitute Security, the Issuer 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 or its agent) connected therewith. In case any
Security which has matured or is about to mature or has been called for
redemption in full shall become mutilated or defaced or be destroyed, lost or
stolen, the Issuer may, instead of issuing a substitute Security, pay or
authorize the payment of the same (without surrender thereof except in the case
of a mutilated or defaced Security), if the applicant for such payment shall
furnish to the Issuer and to the Trustee and any agent of the Issuer or the
Trustee such security or indemnity as any of them may require to hold each of
them harmless, and, in every case of destruction, loss or theft, the applicant
shall also furnish to the Issuer and the Trustee and any agent of the Issuer or
the Trustee evidence to the Trustee's satisfaction of the destruction, loss or
theft of such Security and of the ownership thereof.

      Every substitute Security of any series issued pursuant to the provisions
of this Section by virtue of the fact that any such Security is destroyed, lost
or stolen shall constitute an additional contractual obligation of the Issuer,
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 (but shall be
subject to all the limitations of rights set forth in) this Indenture equally
and proportionately with any and all other Securities of such series duly
authenticated and delivered hereunder. All Securities shall be held and owned
upon the express condition that, to the extent permitted by law, the foregoing
provisions are exclusive with respect to the replacement or payment of
mutilated, defaced, destroyed, lost or stolen Securities and shall preclude any
and all other rights or remedies notwithstanding any law or statute existing or
hereafter enacted to the contrary with respect to the replacement or payment of
negotiable instruments or other securities without their surrender.

      SECTION 2.10 Cancellation of Securities; Disposition Thereof. All
Securities surrendered for payment, redemption, registration of transfer or
exchange, or for credit against any payment in respect of a sinking or analogous
fund, if surrendered to the Issuer or any agent of the Issuer or the Trustee or
any agent of the Trustee, shall be delivered to the Trustee or its agent for
cancellation or, if surrendered to the Trustee, shall be cancelled by it; and no
Securities shall be issued in lieu thereof except as expressly permitted by any
of the provisions of this Indenture. The Trustee shall return all cancelled
Securities to the Company. If the Issuer or its

                                      -18-
<PAGE>   26

agent shall acquire any of the Securities, such acquisition shall not operate as
a redemption or satisfaction of the indebtedness represented by such Securities
unless and until the same are delivered to the Trustee or its agent for
cancellation.

      SECTION 2.11 Temporary Securities. Pending the preparation of definitive
Securities for any series, the Issuer may execute and the Trustee shall
authenticate and deliver temporary Securities for such series (printed,
lithographed, typewritten or otherwise reproduced, in each case in form
satisfactory to the Trustee). Temporary Securities of any series shall be
issuable in any authorized denomination, and substantially in the form of the
definitive Securities of such series but with such omissions, insertions and
variations as may be appropriate for temporary Securities, all as may be
determined by the Issuer with the concurrence of the Trustee as evidenced by the
execution and authentication thereof. Temporary Securities may contain such
references to any provisions of this Indenture as may be appropriate. Every
temporary Security shall be executed by the Issuer and be authenticated by the
Trustee upon the same conditions and in substantially the same manner, and with
like effect, as the definitive Securities. Without unreasonable delay the Issuer
shall execute and shall furnish definitive Securities of such series and
thereupon temporary Securities of such series may be surrendered in exchange
therefor without charge at each office or agency to be maintained by the Issuer
for that purpose pursuant to Section 3.2 and the Trustee shall authenticate and
deliver in exchange for such temporary Securities of such series an equal
aggregate principal amount of definitive Securities of the same series having
authorized denominations. Until so exchanged, the temporary Securities of any
series shall be entitled to the same benefits under this Indenture as definitive
Securities of such series, unless otherwise established pursuant to Section 2.3.

      SECTION 2.12 CUSIP Numbers. The Issuer in issuing the Securities may use
"CUSIP" numbers (if then generally in use), and, if so, the Trustee shall use
"CUSIP" numbers in notices of redemption as a convenience to Holders; provided
that any such notice may state that no representation is made as to the
correctness of such numbers either as printed on the Securities or as contained
in any notice of a redemption and that reliance may be placed only on the other
identification numbers printed on the Securities, and any such redemption shall
not be affected by any defect in or omission of such numbers.

                                 ARTICLE THREE
                             COVENANTS OF THE ISSUER

     Subject to the provisions of Article Ten, the Company covenants for the
benefit of the Securityholders that:

      SECTION 3.1 Payment of Principal and Interest. (a) The Issuer will
punctually pay the principal and interest, if any, to become due in respect of
the Securities according to the terms of the Securities and this Indenture.
Payments of principal and interest shall be made at the Corporate Trust Office.

      (b) The Issuer shall pay interest on overdue principal and interest on
overdue installments of interest, to the extent lawful, at the rate per annum
set forth in the Securities.

                                      -19-
<PAGE>   27

      SECTION 3.2 Maintenance of Office or Agency for Notices and Demands. The
Issuer will maintain in The City of New York an office or agency where the
Securities may be presented for payment, an office or agency where the
Securities may be presented for registration of transfer and for exchange as
provided in this Indenture and an office or agency where notices and demands to
or upon the Issuer in respect of such Securities or of this Indenture may be
served. Until otherwise designated by the Issuer in a written notice to the
Trustee, such office or agency in The City of New York shall be
___________________, an Affiliate of the Trustee, located at ________________.
If at any time the Issuer shall fail to maintain any such required office, such
presentations and demands may also be made and notices may also be served at the
Corporate Trust Office.

      SECTION 3.3 Officers' Annual Compliance Certificate Filed with the
Trustee. Within 120 days after the close of each fiscal year of the Issuer
ending after the date hereof, the Issuer will file with the Trustee a
certificate signed by the chairman of the Board of Directors, the chief
executive officer, the president or any vice president and by the chief
financial officer, treasurer or any assistant treasurer or the secretary or any
assistant secretary of the Issuer (provided that one of such signatories shall
be the Issuer's principal executive officer, principal financial officer or
principal accounting officer), as to such officers' knowledge of the Issuer's
compliance with all conditions and covenants under this Indenture (without
regard to any period of grace or requirement of notice provided hereunder) and
in the event any Default of the Issuer exists, such officers shall specify the
nature of such Default.

      SECTION 3.4 Corporate Existence. Subject to Article Nine, the Issuer will
do or cause to be done all things necessary to preserve and keep in full force
and effect its corporate existence and its material rights (charter and
statutory) and franchises; provided, however, that the Issuer shall not be
required to preserve any such material right or franchise if the preservation
thereof is no longer desirable in the conduct of the business of the Issuer or
the loss thereof is not materially adverse to the Holders of the Securities.

      SECTION 3.5 Payment of Taxes and Other Claims. The Issuer will pay or
discharge or cause to be paid or discharged, before any penalty accrues thereon,
(a) all material taxes, assessments and governmental charges levied or imposed
upon the Issuer or any Subsidiary or upon the income, profits or property of the
Issuer or any Subsidiary, and (b) all material lawful claims for labor,
materials and supplies which, if unpaid, might by law become a Lien upon the
property of the Issuer or any Restricted Subsidiary; provided, however, that the
Issuer 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 3.6 Limitation on Liens. (a) The Issuer will not, nor will it
permit any Restricted Subsidiary to, (i) issue or assume any Debt which is
secured by a Lien upon, or enter into a guarantee of any Debt, which guarantee
is secured by a Lien upon, or (ii) directly or indirectly secure any outstanding
Debt of the Issuer or any Restricted Subsidiary by a Lien upon, any Principal
Property now owned or hereafter acquired, without in any such case effectively
providing, concurrently with the issuance or assumption of any such Debt or
the entry of any

                                      -20-
<PAGE>   28

such guarantee, or the granting of security with respect to any such
outstanding Debt or guarantee, that the Securities (together with, if the
Issuer shall so determine, any other Debt or guarantee of the Issuer or any
Restricted Subsidiary ranking equally with the Securities then existing or
thereafter created) shall be secured equally and ratably with (or prior to)
such Debt or such guarantee; provided, however, that the foregoing restriction
shall not apply to:

            (1)    Liens on any Principal Property acquired after the date of
     this Indenture which are created or assumed contemporaneously with, or
     within 90 days after, such acquisition solely for the purpose of securing
     Debt (including, but not limited to, deferred purchase price obligations)
     representing, or incurred to finance, refinance or refund, the purchase
     price or acquisition cost of the Principal Property subject thereto,
     provided that (A) the principal amount of the Debt secured by such Lien
     does not exceed 100% of such purchase price or acquisition cost and (B)
     such Lien does not extend to or cover any Principal Property other than
     such Principal Property and any improvements on or rights appurtenant
     thereto acquired in such transaction;

            (2)   Liens on any Principal Property acquired after the date of
     this Indenture existing at the time such Principal Property is acquired;

            (3)   Liens on any Principal Property or shares of stock or Debt
     acquired from or through a corporation which is merged with or into the
     Issuer or a Restricted Subsidiary;

            (4)   Liens on receivables subject to a Receivable Financing
     Transaction;

            (5)   Liens to secure Debt of a Subsidiary to the Issuer or to
     another Subsidiary;

            (6)   Liens on any Principal Property in existence on the date of
     this Indenture;

            (7)   Liens on any Principal Property constituting real property
     constructed or improved by the Issuer or any Restricted Subsidiary after
     the date of this Indenture which are created or assumed contemporaneously
     with, or within 90 days after, such construction or improvement solely for
     the purpose of securing Debt (including, but not limited to, deferred
     purchase price obligations) representing, or incurred to finance, refinance
     or refund, the cost of such construction or improvement, provided that (A)
     the principal amount of the Debt secured by such Lien does not exceed 100%
     of such cost and (B) such Lien does not extend to or cover any Principal
     Property other than such real property and any improvements on or rights
     appurtenant thereto constructed or improved in such transaction;

            (8)   Liens in favor of the United States of America, any of its
     territories or possessions, or any State thereof, or any department,
     agency, instrumentality or political subdivision of any thereof, or any
     department, agency or instrumentality of any such political subdivision, to
     secure partial progress, advance or other payments pursuant to any contract
     or statute or to secure any Debt incurred for the purpose of financing all
     or

                                      -21-
<PAGE>   29

    any part of the purchase price or the cost of constructing or improving the
    Principal Property subject to such Lien;

            (9)   pledges or deposits securing Debt incurred in connection with
     workers' compensation, unemployment insurance and other social security
     legislation and deposits securing Debt to insurance carriers under
     insurance or self-insurance arrangements;

           (10)  Liens securing Debt incurred in connection with taxes not yet
     due or which are being contested in good faith by appropriate proceedings,
     provided that adequate reserves with respect thereto are maintained on the
     books of the Issuer or its Subsidiaries, as the case may be, in conformity
     with GAAP (or, in the case of Foreign Subsidiaries, generally accepted
     accounting principles in effect from time to time in their respective
     jurisdictions of incorporation);

           (11)  Liens securing any extension, renewal, substitution or
     replacement (or successive extensions, renewals, substitutions or
     replacements) of Debt of the Issuer or any Restricted Subsidiary which is
     outstanding on December 31, 2000; provided, however, that the principal
     amount of Debt secured thereby shall not exceed the principal amount of
     Debt so secured at December 31, 2000; and

           (12)  any extension, renewal, substitution or replacement (or
     successive extensions, renewals, substitutions or replacements), in whole
     or in part, of any Lien referred to in the foregoing clauses (1) through
     (11), inclusive; provided, however, that such extension, renewal,
     substitution or replacement shall be limited to all or part of the
     Principal Property which secured the Lien so extended, renewed, substituted
     or replaced (plus improvements on such Principal Property).

   (b) Notwithstanding the provisions of Section 3.6(a), the Issuer or any
Restricted Subsidiary may (without equally and ratably securing the Securities)
issue or assume secured Debt, or enter into a secured guarantee, which would
otherwise be subject to the foregoing Lien restrictions in an aggregate amount
which, together with all other such secured Debt and guarantees of the Issuer
and its Restricted Subsidiaries (that is, not including secured Debt and
guarantees of the Issuer and its Restricted Subsidiaries permitted in accordance
with Section 3.6(a)) and all Attributable Debt in respect of Sale and Lease-Back
Transactions existing at such time (other than Sale and Lease-Back Transactions
permitted in accordance with Section 3.7(a)), does not at the time exceed 15% of
Shareholders' Equity in the Issuer and its Consolidated Subsidiaries (excluding
accumulated other comprehensive losses), as shown on the audited consolidated
balance sheet contained in the latest annual report to shareholders of the
Issuer.

      SECTION 3.7 Limitation on Sale and Lease-Back Transactions. (a) The Issuer
will not, nor will it permit any Restricted Subsidiary to, enter into any Sale
and Lease-Back Transaction of any Principal Property unless the proceeds of such
sale or transfer are at least equal to the fair value (as determined by the
Board of Directors) of the Principal Property to be leased pursuant to such Sale
and Lease-Back Transaction and either (i) the Issuer or such Restricted
Subsidiary would be entitled to incur Debt secured by a Lien on such Principal
Property without equally and

                                      -22-
<PAGE>   30

ratably securing the Securities pursuant to Section 3.6, (ii) such Sale and
Lease-Back Transaction is entered into between or among the Issuer and a
Subsidiary or between or among Subsidiaries, (iii) the lease in such Sale and
Lease-Back Transaction is for a period, including renewal rights, of not in
excess of three years, and the Issuer or such Restricted Subsidiary that is a
party to such lease intends that its use of such Principal Property will be
discontinued on or before the expiration of such period, or (iv) the Issuer
covenants that it will apply, or cause such Restricted Subsidiary to apply, an
amount equal to the fair value (as determined by the Board of Directors) of the
Principal Property sold to (1) the retirement (other than any mandatory
retirement), within 60 days of the effective date of any such Sale and
Lease-Back Transaction, of Funded Debt of the Issuer or of such Restricted
Subsidiary or (2) the purchase of property that will constitute Principal
Property.

      (b) Notwithstanding the provisions of Section 3.7(a), the Issuer or any
Restricted Subsidiary may enter into any Sale and Lease-Back Transaction which
would otherwise be subject to the foregoing restrictions if the amount of the
Attributable Debt in respect of such Sale and Lease-Back Transaction, together
with all secured Debt and guarantees of the Issuer and its Restricted
Subsidiaries (other than secured Debt and guarantees of the Issuer and its
Restricted Subsidiaries permitted in accordance with Section 3.6(a)) and all
other Attributable Debt in respect of Sale and Lease-Back Transactions existing
at such time (other than Sale and Lease-Back Transactions permitted in
accordance with Section 3.7(a)), does not at the time exceed 15% of
Shareholders' Equity in the Issuer and its Consolidated Subsidiaries (excluding
accumulated other comprehensive losses), as shown on the audited consolidated
balance sheet contained in the latest annual report to shareholders of the
Issuer.

                                  ARTICLE FOUR
                      SECURITYHOLDERS LISTS AND REPORTS BY
                           THE ISSUER AND THE TRUSTEE

      SECTION 4.1 Issuer to Furnish Trustee Information as to Names and
Addresses of Securityholders. The Issuer and any other obligor on the Securities
covenant and agree that they will furnish or cause to be furnished to the
Trustee a list in such form as the Trustee may reasonably require of the names
and addresses of the Holders of the Securities of each series:

         (a)   semiannually and not more than 15 days after each January 1 and
      July 1, and

         (b)   at such other times as the Trustee may request in writing, within
      30 days after receipt by the Issuer of any such request,

provided that if and so long as the Trustee shall be the registrar for such
series, such list shall not be required to be furnished.

      SECTION 4.2 Preservation and Disclosure of Securityholders Lists. (a) The
Trustee shall preserve, in as current a form as is reasonably practicable, all
information as to the names and addresses of the Holders of each series of
Securities (i) contained in the most recent list furnished to it as provided in
Section 4.1, and (ii) received by it in the capacity of registrar or

                                      -23-
<PAGE>   31

paying agent for such series, if so acting. The Trustee may destroy any list
furnished to it as provided in Section 4.1 upon receipt of a new list so
furnished.

      (b) In case three or more Holders of Securities (hereinafter referred to
as "applicants") apply in writing to the Trustee and furnish to the Trustee
reasonable proof that each such applicant has owned a Security for a period of
at least six months preceding the date of such application, and such application
states that the applicants desire to communicate with other Holders of
Securities of a particular series (in which case the applicants must all hold
Securities of such series) or with Holders of all Securities with respect to
their rights under this Indenture or under such Securities and such application
is accompanied by a copy of the form of proxy or other communication which such
applicants propose to transmit, then the Trustee shall, within five Business
Days after the receipt of such application, at its election, either

          (i)   afford to such applicants access to the information preserved at
    the time by the Trustee in accordance with the provisions of subsection (a)
    of this Section 4.2, or

         (ii)   inform such applicants as to the approximate number of Holders
    of Securities of such series or of all Securities, as the case may be, whose
    names and addresses appear in the information preserved at the time by the
    Trustee, in accordance with the provisions of subsection (a) of this Section
    4.2, and as to the approximate cost of mailing to such Securityholders the
    form of proxy or other communication, if any, specified in such application.

      If the Trustee shall elect not to afford to such applicants access to such
information, the Trustee shall, upon the written request of such applicants,
mail to each Securityholder of such series or all Holders of Securities, as the
case may be, whose name and address appears in the information preserved at the
time by the Trustee in accordance with the provisions of subsection (a) of this
Section 4.2, a copy of the form of proxy or other communication which is
specified in such request, with reasonable promptness after a tender to the
Trustee of the material to be mailed and of payment, or provision for the
payment, of the reasonable expenses of mailing, unless within five days after
such tender, the Trustee shall mail to such applicants and file with the
Commission, together with a copy of the material to be mailed, a written
statement to the effect that, in the opinion of the Trustee, such mailing would
be contrary to the best interests of the Holders of Securities of such series or
of all Securities, as the case may be, or would be in violation of applicable
law. Such written statement shall specify the basis of such opinion. If the
Commission, after opportunity for a hearing upon the objections specified in the
written statement so filed, shall enter an order refusing to sustain any of such
objections or if, after the entry of an order sustaining one or more of such
objections, the Commission shall find, after notice and opportunity for hearing,
that all the objections so sustained have been met, and shall enter an order so
declaring, the Trustee shall mail copies of such material to all such
Securityholders with reasonable promptness after the entry of such order and the
renewal of such tender; otherwise the Trustee shall be relieved of any
obligation or duty to such applicants respecting their application.

                                      -24-
<PAGE>   32

      (c) Each and every Holder of Securities, by receiving and holding the
same, agrees with the Issuer and the Trustee that neither the Issuer nor the
Trustee nor any agent of the Issuer or the Trustee shall be held accountable by
reason of the disclosure of any such information as to the names and addresses
of the Holders of Securities in accordance with the provisions of subsection (b)
of this Section 4.2, regardless of the source from which such information was
derived, and that the Trustee shall not be held accountable by reason of mailing
any material pursuant to a request made under such subsection (b).

SECTION 4.3       Reports by the Issuer.  The Issuer covenants:

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

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

      (c) to transmit by mail to the Holders of Securities within 30 days after
the filing thereof with the Trustee, in the manner and to the extent provided in
Section 4.4(c), such summaries of any information, documents and reports
required to be filed by the Issuer pursuant to subsections (a) and (b) of this
Section 4.3 as may be required to be transmitted to such Holders by rules and
regulations prescribed from time to time by the Commission.

      SECTION 4.4 Reports by the Trustee. (a) Within 60 days after May 15 of
each year commencing with the May 15 following the date of this Indenture, the
Trustee shall transmit by mail to the Holders of Securities, as provided in
subsection (c) of this Section 4.4, a brief report dated as of such May 15 with
respect to any of the following events which may have occurred within the last
12 months (but if no such event has occurred within such period, no report need
be transmitted):

                (i) any change to its eligibility under Section 6.9 and its
       qualification under Section 6.8;

               (ii) the creation of, or any material change to, a relationship
       specified in paragraph (1) through (10) of Section 310(b) of the Trust
       Indenture Act of 1939;

                                      -25-
<PAGE>   33

              (iii) the character and amount of any advances (and if the Trustee
       elects so to state, the circumstances surrounding the making thereof)
       made by the Trustee (as such) which remain unpaid on the date of such
       report and for the reimbursement of which it claims or may claim a lien
       or charge, prior to that of the Securities of any series, on any property
       or funds held or collected by it as Trustee, except that the Trustee
       shall not be required (but may elect) to report such advances if such
       advances so remaining unpaid aggregate not more than 1/2 of 1% of the
       principal amount of all Securities Outstanding on the date of such
       report;

               (iv) the amount, interest rate, if any, and maturity date of all
       other indebtedness owing by the Issuer (or by any other obligor on the
       Securities) to the Trustee in its individual capacity on the date of such
       report, with a brief description of any property held as collateral
       security therefor, except any indebtedness based upon a creditor
       relationship arising in any manner described in Section 6.13;

                (v) any change to the property and funds, if any, physically in
       the possession of the Trustee (as such) on the date of such report;

               (vi)  any additional issue of Securities which the Trustee has
       not previously reported; and

              (vii)  any action taken by the Trustee in the performance of its
       duties under this Indenture which it has not previously reported and
       which in its opinion materially affects the Securities, except action in
       respect of a Default, notice of which has been or is to be withheld by it
       in accordance with the provisions of Article Five.

       (b) The Trustee shall transmit to the Securityholders of each series, as
provided in subsection (c) of this Section 4.4, a brief report with respect to
the character and amount of any advances (and if the Trustee elects so to state,
the circumstances surrounding the making thereof) made by the Trustee, as such,
since the date of the last report transmitted pursuant to the provisions of
subsection (a) of this Section 4.4 (or if no such report has yet been so
transmitted, since the date of this Indenture) for the reimbursement of which it
claims or may claim a lien or charge prior to that of the Securities of such
series on property or funds held or collected by it as Trustee and which it has
not previously reported pursuant to this subsection (b), except that the Trustee
shall not be required (but may elect) to report such advances if such advances
remaining unpaid at any time aggregate 10% or less of the principal amount of
all Securities Outstanding at such time, such report to be transmitted within 90
days after such time.

       (c) Reports pursuant to this Section shall be transmitted by mail:

           (i)   to all Holders of Securities, as the names and addresses of
       such Holders appear upon the registry books of the Issuer; and

          (ii)   to all other Persons to whom such reports are required to be
      transmitted pursuant to Section 313(c) of the Trust Indenture Act of 1939.

                                      -26-
<PAGE>   34

       (d) A copy of each such report shall, at the time of such transmission to
Securityholders, be furnished to the Issuer and be filed by the Trustee with
each stock exchange upon which the Securities of any applicable series are
listed and also with the Commission. The Issuer agrees to promptly notify the
Trustee with respect to any series when and as the Securities of such series
become admitted to trading on any national securities exchange.

                                  ARTICLE FIVE
                   REMEDIES OF THE TRUSTEE AND SECURITYHOLDERS
                               ON EVENT OF DEFAULT

      SECTION 5.1 Events of Default. "Event of Default", wherever used herein
with respect to Securities of any series, means any one or more of the following
events (whatever the reason for such Event of Default), unless it is either
inapplicable to a particular series or it is specifically deleted or modified in
or pursuant to the Board Resolution, Officers' Certificate or supplemental
indenture establishing such series of Securities or in the form of Security, for
such series:

               (a) Failure to pay any installment of interest on any of the
      Securities of such series, when and as the same shall become due and
      payable as therein expressed, and such failure shall continue for a period
      of 30 days (it being understood that if the entire amount of such payment
      of interest is irrevocably deposited by the Issuer with the Trustee, or
      with another paying agent duly appointed hereunder, before the
      expiration of such period of 30 days, such default shall no longer be
      considered to be continuing under this Indenture); or

               (b)   Failure to pay the principal of the Securities of such
      series when and as the same shall become due and payable, whether at
      Stated Maturity thereof or otherwise; or

               (c)   Failure to perform or observe any other of the covenants,
      conditions or agreements on the part of the Issuer in this Indenture
      (other than a covenant, condition or agreement a Default in whose
      performance or whose breach is elsewhere in this Section specifically
      dealt with) or in the Securities of such series, and such failure shall
      continue for a period of 60 days after written notice specifying the
      failure and that the same is a Default and requiring the Issuer to remedy
      such failure shall have been given to the Issuer from the Trustee or to
      the Issuer and to the Trustee from the Holders of not less than 25% of the
      principal amount of the Securities of such series then Outstanding; or

               (d)   If the Issuer or any Subsidiary shall file a petition
      commencing a voluntary case under any provision of Bankruptcy Law; or the
      Issuer or any Subsidiary shall file a petition or answer or consent
      seeking reorganization, arrangement, adjustment, or composition under any
      Bankruptcy Law, or shall consent to the filing of any such petition,
      answer, or consent; or the Issuer or any Subsidiary shall appoint, or
      consent to the appointment of, a custodian, receiver, liquidator,
      trustee, assignee, sequestrator or other similar official in bankruptcy
      or insolvency of the Issuer or any Subsidiary or of any substantial
      part of its property; or shall make an assignment for the benefit of
      creditors; or

                                      -27-
<PAGE>   35

               (e)   If any order for relief against the Issuer or any
      Subsidiary shall have been entered by a court having jurisdiction in the
      premises under any provision of Bankruptcy Law and such order shall have
      continued undischarged or unstayed for a period of 120 days; or a decree
      or order by a court having jurisdiction in the premises shall have been
      entered approving as properly filed a petition seeking reorganization,
      arrangement, adjustment, or composition of the Issuer under any Bankruptcy
      Law, and such decree or order shall have continued undischarged or
      unstayed for a period of 120 days; or a decree or order of a court having
      jurisdiction in the premises for the appointment of a custodian, receiver,
      liquidator, trustee, assignee, sequestrator, or other similar official in
      bankruptcy or insolvency of the Issuer or any Subsidiary or of any
      substantial part of its property, or for the winding up or liquidation of
      its affairs, shall have been entered, and such decree or order shall have
      remained in force undischarged or unstayed for a period of 120 days.

      If an Event of Default specified in Section 5.1(a), 5.1(b) or 5.1(c) with
respect to Securities of any series then Outstanding occurs and is continuing,
then and in each and every such case, unless the principal of all of the
Securities of such series shall have already become due and payable, either the
Trustee or the Holders of not less than 25% in aggregate principal amount of the
Securities of such series then Outstanding, by notice in writing to the Issuer
(and to the Trustee if given by Securityholders), may declare the principal (or,
if the Securities of such series are Original Issue Discount Securities, such
portion of the principal amount as may be specified in the terms of such series)
of all the Securities of such series and the interest, if any, accrued thereon
to be due and payable immediately, and upon any such declaration the same shall
become and shall be immediately due and payable, notwithstanding anything to the
contrary contained in this Indenture or in the Securities of such series. This
provision, however, is subject to the condition that, if at any time after the
unpaid principal amount (or such specified amount) of the Securities of such
series shall have been so declared due and payable and before any judgment or
decree for the payment of the moneys due shall have been obtained or entered as
hereinafter provided, the Issuer shall pay or shall deposit with the Trustee a
sum sufficient to pay all matured installments of interest, if any, upon all of
the Securities of such series and the principal of any and all Securities of
such series which shall have become due otherwise than by acceleration (with
interest on overdue installments of interest, if any, to the extent that payment
of such interest is enforceable under applicable law and on such principal at
the rate borne by the Securities of such series to the date of such payment or
deposit) and the reasonable compensation, disbursements, expenses and advances
of the Trustee and all other amounts due the Trustee under Section 6.6, and any
and all Defaults under this Indenture, other than the nonpayment of such portion
of the principal amount of and accrued interest, if any, on Securities of such
series which shall have become due by acceleration, shall have been cured or
shall have been waived in accordance with Section 5.7 or provision deemed by the
Trustee to be adequate shall have been made therefor, then and in every such
case the Holders of a majority in aggregate principal amount of the Securities
of such series then Outstanding, by written notice to the Issuer and to the
Trustee, may rescind and annul such declaration and its consequences; but no
such rescission and annulment shall extend to or shall affect any subsequent
Default, or shall impair any right consequent thereon. If any Event of Default
specified in Section 5.1(d) or 5.1(e) occurs, all unpaid principal amount (or,
if the Securities of any series then Outstanding are Original Issue Discount
Securities, such portion of the principal amount as may be specified in

                                      -28-
<PAGE>   36

the terms of each such series) and accrued interest on all Securities of each
series then Outstanding shall ipso facto become and be immediately due and
payable without any declaration or other act by the Trustee or any
Securityholder.

      If the Trustee shall have proceeded to enforce any right under this
Indenture and such proceedings shall have been discontinued or abandoned because
of such rescission or annulment or for any other reason or shall have been
determined adversely to the Trustee, then and in every such case the Issuer, the
Trustee and the Securityholders shall be restored respectively to their several
positions and rights hereunder, and all rights, remedies and powers of the
Issuer, the Trustee and the Securityholders shall continue as though no such
proceeding had been taken.

      Except with respect to an Event of Default pursuant to Section 5.1(a) or
(b), the Trustee shall not be charged with knowledge of any Event of Default
unless written notice thereof shall have been given to a Responsible Officer by
the Issuer, a paying agent or any Securityholder.

      SECTION 5.2 Payment of Securities on Default; Suit Therefor. The Issuer
covenants that (a) if Default shall be made in the payment of any installment of
interest upon any of the Securities of any series then Outstanding as and when
the same shall become due and payable, and such Default shall have continued for
a period of 30 days, or (b) if Default shall be made in the payment of the
principal of any of the Securities of such series as and when the same shall
have become due and payable, whether at the Stated Maturity of the Securities of
such series or upon redemption or by declaration or otherwise, then, upon demand
of the Trustee, the Issuer will pay to the Trustee, for the benefit of the
Holders of the Securities, the whole amount that then shall have become due and
payable on all such Securities of such series for principal or interest, if any,
or both, as the case may be, with interest upon the overdue principal and (to
the extent that payment of such interest is enforceable under applicable law)
upon the overdue installments of interest, if any, at the rate borne by the
Securities of such series; and, in addition thereto, such further amount as
shall be sufficient to cover the costs and expenses of collection, including a
reasonable compensation to the Trustee, its agents, attorneys and counsel, and
any expenses or liabilities incurred by the Trustee hereunder other than through
its negligence or bad faith.

      If the Issuer shall fail forthwith to pay such amounts upon such demand,
the Trustee, in its own name and as trustee of an express trust, shall be
entitled and empowered to institute any actions or proceedings at law or in
equity for the collection of the sums so due and unpaid, and may prosecute any
such action or proceeding to judgment or final decree, and may enforce any such
judgment or final decree against the Issuer or any other obligor on the
Securities of such series and collect in the manner provided by law out of the
property of the Issuer or any other obligor on the Securities of such series,
wherever situated, the moneys adjudged or decreed to be payable.

      If there shall be pending proceedings for the bankruptcy or for the
reorganization of the Issuer or any other obligor on the Securities of any
series then Outstanding under any bankruptcy, insolvency or other similar law
now or hereafter in effect, or if a receiver or trustee or similar official
shall have been appointed for the property of the Issuer or such other obligor,

                                      -29-
<PAGE>   37

or in the case of any other similar judicial proceedings relative to the Issuer
or other obligor upon the Securities of such series, or to the creditors or
property of the Issuer or such other obligor, the Trustee, irrespective of
whether the principal of the Securities of such series shall then be due and
payable as therein expressed or by declaration or otherwise and irrespective of
whether the Trustee shall have made any demand pursuant to the provisions of
this Section 5.2, shall be entitled and empowered by intervention in such
proceedings or otherwise to file and prove a claim or claims for the whole
amount of principal and interest, if any, owing and unpaid in respect of the
Securities of such series, and, in case of any judicial proceedings, to file
such proofs of claim and other papers or documents as may be necessary or
advisable in order to have the claims of the Trustee and of the Securityholders
allowed in such judicial proceedings relative to the Issuer or any other obligor
on the Securities of such series, its or their creditors, or its or their
property, and to collect and receive any moneys or other property payable or
deliverable on any such claims, and to distribute the same after the deduction
of its charges and expenses, and any receiver, assignee or trustee or similar
official in bankruptcy or reorganization is hereby authorized by each of the
Securityholders to make such payments to the Trustee, and, if the Trustee shall
consent to the making of such payments directly to the Securityholders, to pay
to the Trustee any amount due it for compensation and expenses or otherwise
pursuant to Section 6.6, including counsel fees and expenses incurred by it up
to the date of such distribution. To the extent that such payment of reasonable
compensation, expenses and counsel fees and expenses out of the estate in any
such proceedings shall be denied for any reason, payment of the same shall be
secured by a lien on, and shall be paid out of, any and all distributions,
dividends, moneys, securities and other property which the Holders of the
Securities of such series may be entitled to receive in such proceedings,
whether in liquidation or under any plan of reorganization or arrangement or
otherwise.

      All rights of action and of asserting claims under this Indenture, or
under any of the Securities, may be enforced by the Trustee without the
possession of any of the Securities, or the production thereof at any trial or
other proceeding relative thereto, and any such suit or proceeding instituted by
the Trustee shall be brought in its own name as trustee of an express trust, and
any recovery of judgment shall be for the ratable benefit of the Holders of the
Securities of the series in respect of which such judgment has been recovered.

      SECTION 5.3 Application of Moneys Collected by Trustee. Any moneys
collected by the Trustee pursuant to Section 5.2 with respect to Securities of
any series then Outstanding shall be applied in the order following, at the date
or dates fixed by the Trustee for the distribution of such moneys, upon
presentation of the several Securities of such series, and stamping thereon the
payment, if only partially paid, and upon surrender thereof, if fully paid:

          FIRST: To the payment of costs and expenses of collection and
     reasonable compensation to the Trustee, its agents, attorneys and counsel,
     and of all other expenses and liabilities incurred, and all advances made,
     by the Trustee pursuant to Section 6.6 except as a result of its negligence
     or bad faith;

         SECOND: If the principal of the Outstanding Securities of such series
     shall not have become due and be unpaid, to the payment of interest, if
     any, on the Securities

                                      -30-
<PAGE>   38

     of such series, in the order of the maturity of the installments of such
     interest, if any, with interest (to the extent that such interest has been
     collected by the Trustee) upon the overdue installments of interest, if
     any, at the rate borne by the Securities of such series, such payment to be
     made ratably to the Persons entitled thereto;

         THIRD: If the principal of the Outstanding Securities of such series
     shall have become due, by declaration or otherwise, to the payment of the
     whole amount then owing and unpaid upon the Securities of such series for
     principal and interest, if any, with interest on the overdue principal and
     (to the extent that such interest has been collected by the Trustee) upon
     overdue installments of interest, if any, at the rate borne by the
     Securities of such series; and in case such moneys shall be insufficient to
     pay in full the whole amounts so due and unpaid upon the Securities of such
     series, then to the payment of such principal and interest, if any, without
     preference or priority of principal over interest or of interest over
     principal, or of any installment of interest over any other installment of
     interest, or of any Security over any other Security, ratably to the
     aggregate of such principal and accrued and unpaid interest; and

         FOURTH:   To the payment of any surplus then remaining to the Issuer,
     its successors or assigns, or to whomsoever may be lawfully entitled to
     receive the same.

      No claim for interest which in any manner at or after maturity shall have
been transferred or pledged separate or apart from the Securities to which it
relates, or which in any manner shall have been kept alive after maturity by an
extension (otherwise than pursuant to an extension made pursuant to a plan
proposed by the Issuer to the Holders of all Securities of any series then
Outstanding), purchase, funding or otherwise by or on behalf or with the consent
or approval of the Issuer shall be entitled, in case of a Default hereunder, to
any benefit of this Indenture, except after prior payment in full of the
principal of all Securities of any series then Outstanding and of all claims for
interest not so transferred, pledged, kept alive, extended, purchased or funded.

      SECTION 5.4 Proceedings by Securityholders. No Holder of any Securities of
any series then Outstanding shall have any right by virtue of or by availing of
any provision of this Indenture to institute any suit, action or proceeding in
equity or at law upon or under or with respect to this Indenture or for the
appointment of a receiver or trustee or similar official, or for any other
remedy hereunder, unless such Holder previously shall have given to the Trustee
written notice of Default and of the continuance thereof, as hereinbefore
provided, and unless the Holders of not less than 25% in aggregate principal
amount of the Securities of such series then Outstanding shall have made written
request to the Trustee to institute such action, suit or proceeding in its own
name as Trustee hereunder and shall have offered to the Trustee such reasonable
indemnity as it may require against the costs, expenses and liabilities to be
incurred therein or thereby, and the Trustee for 60 days after its receipt of
such notice, request and offer of indemnity, shall have neglected or refused to
institute any such action, suit or proceeding, it being understood and intended,
and being expressly covenanted by the Holder of every Security of such series
with every other taker and Holder and the Trustee, that no one or more Holders
of Securities of such series shall have any right in any manner whatever by
virtue of or by availing of any provision of this Indenture or of the Securities
to affect, disturb or prejudice the rights of

                                      -31-
<PAGE>   39

any other Holder of such Securities of such series, or to obtain or seek to
obtain priority over or preference as to any other such Holder, or to enforce
any right under this Indenture or the Securities, except in the manner herein
provided and for the equal, ratable and common benefit of all Holders of
Securities of such series.

      Notwithstanding any other provisions in this Indenture, however, the right
of any Holder of any Security to receive payment of the principal of, premium,
if any, and interest, if any, on such Security, on or after the respective due
dates expressed in such Security, or to institute suit for the enforcement of
any such payment on or after such respective dates shall not be impaired or
affected without the consent of such Holder.

      SECTION 5.5 Proceedings by Trustee. In case of an Event of Default
hereunder, the Trustee may in its discretion proceed to protect and enforce the
rights vested in it by this Indenture by such appropriate judicial proceedings
as the Trustee shall deem most effectual to protect and enforce any of such
rights, either by suit in equity or by action at law or by proceedings in
bankruptcy or otherwise, whether for the specific enforcement of any covenant or
agreement contained in this Indenture or in aid of the exercise of any power
granted in this Indenture, or to enforce any other legal or equitable right
vested in the Trustee by this Indenture or by law.

      SECTION 5.6 Remedies Cumulative and Continuing. All powers and remedies
given by this Article Five to the Trustee or to the Securityholders shall, to
the extent permitted by law, be deemed cumulative and not exclusive of any
thereof or of any other powers and remedies available to the Trustee or the
Securityholders, by judicial proceedings or otherwise, to enforce the
performance or observance of the covenants and agreements contained in this
Indenture, and no delay or omission of the Trustee or of any Securityholder to
exercise any right or power accruing upon any Default occurring and continuing
as aforesaid shall impair any such right or power, or shall be construed to be a
waiver of any such Default or an acquiescence therein; and, subject to the
provisions of Section 5.4, every power and remedy given by this Article Five or
by law to the Trustee or to the Securityholders may be exercised from time to
time, and as often as shall be deemed expedient, by the Trustee or by the
Securityholders.

      SECTION 5.7 Direction of Proceedings; Waiver of Defaults by Majority of
Securityholders. The Holders of a majority in aggregate principal amount of the
Securities of any series then Outstanding 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 Securities of such series; provided, however, that (subject to the
provisions of Section 6.1) the Trustee shall have the right to decline to follow
any such direction if the Trustee shall determine upon advice of counsel that
the action or proceeding so directed may not lawfully be taken or if the Trustee
in good faith by its board of directors, its executive committee, or a trust
committee of directors or Responsible Officers or both shall determine that the
action or proceeding so directed would involve the Trustee in personal liability
unless such Holders provide the Trustee with indemnity satisfactory to it. The
Holders of a majority in aggregate principal amount of the Securities of any
series then Outstanding may on behalf of the Holders of all of the Securities of
such series waive any past Default or Event of

                                      -32-
<PAGE>   40

Default hereunder and its consequences except a Default in the payment of
interest, if any, on, or the principal of, the Securities of such series. Upon
any such waiver the Issuer, the Trustee and the Holders of the Securities of
such series shall be restored to their former positions and rights hereunder,
respectively; but no such waiver shall extend to any subsequent or other
Default or Event of Default or impair any right consequent thereon. Whenever
any Default or Event of Default hereunder shall have been waived as permitted
by this Section 5.7, said Default or Event of Default shall for all purposes of
the Securities and this Indenture be deemed to have been cured and to be not
continuing.

      SECTION 5.8 Notice of Defaults. The Trustee shall, within 90 days after
the occurrence of a Default, with respect to Securities of any series then
Outstanding, mail to all Holders of Securities of such series, as the names and
the addresses of such Holders appear upon the Securities register, notice of all
Defaults known to the Trustee with respect to such series, unless such Defaults
shall have been cured before the giving of such notice (the term "Defaults" for
the purpose of this Section 5.8 being hereby defined to be the events specified
in clauses (a), (b), (c), (d) and (e) of Section 5.1, not including periods of
grace, if any, provided for therein and irrespective of the giving of the
written notice specified in said clause (c) but in the case of any Default of
the character specified in said clause (c) no such notice to Securityholders
shall be given until at least 60 days after the giving of written notice thereof
to the Issuer pursuant to said clause (c)); provided, however, that, except in
the case of Default in the payment of the principal of, premium, if any, or
interest, if any, on any of the Securities, or in the payment or satisfaction of
any sinking fund or other purchase obligation, the Trustee shall be protected in
withholding such notice if and so long as the board of directors, the executive
committee, or a trust committee of directors or Responsible Officers or both of
the Trustee in good faith determines that the withholding of such notice is in
the best interests of the Securityholders.

      SECTION 5.9 Undertaking to Pay Costs. All parties to this Indenture agree,
and each Holder of any Security by his acceptance thereof shall be deemed to
have agreed, that any court may in its discretion require, in any suit for the
enforcement of any right or remedy under this Indenture, or in any suit against
the Trustee for any action taken or omitted by it as Trustee, the filing by any
party litigant in such suit of an undertaking to pay the cost of such suit, and
that such court may in its discretion assess reasonable costs, including
reasonable attorneys' fees and expenses, against any party litigant in such
suit, having due regard to the merits and good faith of the claims or defenses
made by such party litigant; but the provisions of this Section 5.9 shall not
apply to any suit instituted by the Trustee, to any suit instituted by any
Securityholder, or group of Securityholders, holding in the aggregate more than
10% in principal amount of the Securities of any series then Outstanding, or to
any suit instituted by any Securityholders for the enforcement of the payment of
the principal of or interest, if any, on any Security against the Issuer on or
after the due date expressed in such Security.

                                  ARTICLE SIX
                             CONCERNING THE TRUSTEE

      SECTION 6.1 Duties and Responsibilities of the Trustee; During Default;
Prior to Default. With respect to the Holders of any series of Securities issued
hereunder, the Trustee,

                                      -33-
<PAGE>   41

prior to the occurrence of an Event of Default with respect to the Securities of
a particular series and after the curing or waiving of all Events of Default
which may have occurred with respect to such series, undertakes to perform such
duties and only such duties as are specifically set forth in this Indenture. In
case an Event of Default with respect to the Securities of a series has occurred
(which has not been cured or waived) the Trustee shall exercise with respect to
such series of Securities such of the rights and powers vested in it by this
Indenture, and use the same degree of care and skill in their exercise as a
prudent man would exercise or use under the circumstances in the conduct of his
own affairs.

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

            (a)   prior to the occurrence of an Event of Default with respect to
      the Securities of any series and after the curing or waiving of all such
      Events of Default with respect to such series which may have occurred:

                 (i) the duties and obligations of the Trustee with respect to
            the Securities of any series shall be determined solely by the
            express provisions of this Indenture, and the Trustee shall not be
            liable except for the performance of such duties and obligations as
            are specifically set forth in this Indenture, and no implied
            covenants or obligations shall be read into this Indenture against
            the Trustee; and

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

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

           (c)   the Trustee shall not be liable with respect to any action
      taken or omitted to be taken by it in good faith in accordance with the
      direction of the Holders pursuant to Article Five relating to the time,
      method and place of conducting any proceeding for any remedy available to
      the Trustee, or exercising any trust or power conferred upon the Trustee,
      under this Indenture.

      None of the provisions contained in this Indenture shall require the
Trustee to expend or risk its own funds or otherwise incur personal financial
liability in the performance of any of its duties or in the exercise of any of
its rights or powers, if there shall be reasonable ground for

                                      -34-
<PAGE>   42

believing that the repayment of such funds or adequate indemnity against such
liability is not reasonably assured to it.

      SECTION 6.2  Certain Rights of the Trustee.  Subject to Section 6.1:

      (a) the Trustee may rely and shall be protected in acting or refraining
from acting upon any resolution, Officers' Certificate or any other certificate,
statement, instrument, opinion, report, notice, request, consent, order, bond,
debenture, note, coupon, security or other paper or document believed by it to
be genuine and to have been signed or presented by the proper party or parties;

      (b) any request, direction, order or demand of the Issuer mentioned herein
shall be sufficiently evidenced by an Officers' Certificate or Issuer Order
(unless other evidence in respect thereof be herein specifically prescribed);
and any resolution of the Board of Directors may be evidenced to the Trustee by
a Board Resolution;

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

      (d) the Trustee shall be under no obligation to exercise any of the trust
or powers vested in it by this Indenture at the request, order or direction of
any of the Securityholders pursuant to the provisions of this Indenture
(including, without limitation, pursuant to Article Five) unless such
Securityholders shall have offered to the Trustee reasonable security or
indemnity against the costs, expenses and liabilities which might be incurred
therein or thereby;

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

      (f) prior to the occurrence of an Event of Default hereunder and after the
curing or waiving of all Events of Default, 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, consent,
order, approval, appraisal, bond, debenture, note, coupon, security, or other
paper or document unless requested in writing so to do by the Holders of not
less than a majority in aggregate principal amount of the Securities of all
series affected then Outstanding; provided that, if the payment within a
reasonable time to the Trustee of the costs, expenses or liabilities likely to
be incurred by it in the making of such investigation is, in the opinion of the
Trustee, not reasonably assured to the Trustee by the security afforded to it by
the terms of this Indenture, the Trustee may require reasonable indemnity
against such expenses or liabilities as a condition to proceeding; the
reasonable expenses of every such investigation shall be paid by the Issuer or,
if paid by the Trustee or any predecessor Trustee, shall be repaid by the Issuer
upon demand;

                                      -35-
<PAGE>   43

      (g) 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 not regularly in its employ and the Trustee shall not be responsible
for any misconduct or negligence on the part of any such agent or attorney
appointed with due care by it hereunder; and

      (h) the Trustee shall not be charged with knowledge of any Default or
Event of Default with respect to a series of Securities unless either (i) a
Responsible Officer of the Trustee assigned to the Corporate Trust Office of the
Trustee (or any successor division or department of the Trustee) shall have
actual knowledge of such Default or Event of Default or (ii) written notice of
such Default or Event of Default shall have been given to the Trustee by the
Issuer or any other obligor on such series of Securities or by any Holder of
Securities of such series.

      SECTION 6.3 Trustee Not Responsible for Recitals, Disposition of
Securities or Application of Proceeds Thereof. The recitals contained herein and
in the Securities, except the Trustee's certificates of authentication, shall be
taken as the statements of the Issuer, and the Trustee assumes no responsibility
for the correctness of the same. The Trustee makes no representation as to the
validity or sufficiency of this Indenture, of the Securities or of any
prospectus used to sell the Securities. The Trustee shall not be accountable for
the use or application by the Issuer of any of the Securities or of the proceeds
thereof.

      SECTION 6.4 Trustee and Agents May Hold Securities; Collections, etc. The
Trustee or any agent of the Issuer or the Trustee, in its individual or any
other capacity, may become the owner or pledgee of Securities with the same
rights it would have if it were not the Trustee or such agent and, subject to
Sections 6.8 and 6.13, may otherwise deal with the Issuer and receive, collect,
hold and retain collections from the Issuer with the same rights it would have
if it were not the Trustee or such agent.

      SECTION 6.5 Moneys Held by Trustee. Subject to the provisions of Section
10.4 hereof, all moneys received by the Trustee shall, until used or applied as
herein provided, be held in trust for the purposes for which they were received,
but need not be segregated from other funds except to the extent required by
mandatory provisions of law. Neither the Trustee nor any agent of the Issuer or
the Trustee shall be under any liability for interest on any moneys received by
it hereunder.

      SECTION 6.6 Compensation and Indemnification of Trustee and Its Prior
Claim. The Issuer covenants and agrees to pay to the Trustee from time to time,
and the Trustee shall be entitled to, such compensation as shall be agreed to in
writing between the Issuer and the Trustee (which shall not be limited by any
provision of law in regard to the compensation of a trustee of an express trust)
and the Issuer covenants and agrees to pay or reimburse the Trustee and each
predecessor Trustee upon its request for all reasonable expenses, disbursements
and advances incurred or made by or on behalf of it in accordance with any of
the provisions of this Indenture (including the reasonable compensation and the
expenses and disbursements of its counsel and of all agents and other persons
not regularly in its employ) except any such expense, disbursement or advance as
may arise from its negligence or bad faith. The Issuer also covenants to
indemnify the Trustee and each predecessor Trustee for, and to hold it harmless
against, any and all loss,

                                      -36-
<PAGE>   44

liability, damage, claim or expense, including taxes (other than taxes based on
the income of the Trustee), incurred without negligence or bad faith on its
part, arising out of or in connection with the acceptance or administration of
this Indenture or the trusts hereunder and its duties hereunder, including the
costs and expenses of defending itself against or investigating any claim or
liability in the premises. The obligations of the Issuer under this Section 6.6
to compensate and indemnify the Trustee and each predecessor Trustee and to pay
or reimburse the Trustee and each predecessor Trustee for expenses,
disbursements and advances shall constitute additional indebtedness hereunder
and shall survive the satisfaction and discharge of this Indenture or the
resignation or removal of the Trustee. Such additional indebtedness shall be a
senior claim to that of the Securities upon all property and funds held or
collected by the Trustee as such, except funds held in trust for the benefit of
the Holders of particular Securities, and the Securities are hereby subordinated
to such senior claim. When the Trustee incurs expenses or renders services in
connection with an Event of Default specified in Section 5.1(d) or (e) or in
connection with Article Five hereof, the expenses (including the reasonable fees
and expenses of its counsel) and the compensation for the service in connection
therewith are intended to constitute expenses of administration under any
bankruptcy law without any need to demonstrate substantial contribution under
any bankruptcy law. The provisions of this Section 6.6 shall survive the
resignation or removal of the Trustee and the termination of this Indenture.

      SECTION 6.7 Right of Trustee to Rely on Officers' Certificate, etc.
Subject to Sections 6.1 and 6.2, whenever in the administration of the trusts of
this Indenture the Trustee shall deem it necessary or desirable that a matter be
proved or established prior to taking or suffering or omitting any action
hereunder, such matter (unless other evidence in respect thereof be herein
specifically prescribed) may, in the absence of negligence or bad faith on the
part of the Trustee, be deemed to be conclusively proved and established by an
Officers' Certificate delivered to the Trustee, and such certificate, in the
absence of negligence or bad faith on the part of the Trustee, shall be full
warrant to the Trustee for any action taken, suffered or omitted by it under the
provisions of this Indenture upon the faith thereof.

      SECTION 6.8 Qualification of Trustee; Conflicting Interests. This
Indenture shall always have a Trustee who satisfies the requirements of Section
310(a)(1) of the Trust Indenture Act of 1939. The Trustee shall have a combined
capital and surplus of at least $25,000,000 as set forth in its most recent
published annual report of condition. The Trustee shall comply with Section
310(b) of the Trust Indenture Act of 1939 regarding disqualification of a
trustee upon acquiring a conflicting interest.

      SECTION 6.9 Persons Eligible for Appointment as Trustee; Different
Trustees for Different Series. The Trustee for each series of Securities
hereunder shall at all times be a corporation organized and doing business under
the laws of the United States of America or of any state or the District of
Columbia having a combined capital and surplus of at least $25,000,000, and
which is authorized under such laws to exercise corporate trust powers and is
subject to supervision or examination by federal, state or District of Columbia
authority, or a corporation or other Person permitted to act as trustee by the
Commission. If such corporation publishes reports of condition at least
annually, pursuant to  law or to the requirements of the aforesaid supervising
or examining authority, then for the purposes of this Section, the combined

                                     -37-

<PAGE>   45

capital and surplus of such corporation shall be deemed to be its combined
capital and surplus as set forth in its most recent report of condition so
published. No obligor upon the Securities or any Affiliate of such obligor
shall serve as trustee upon the Securities. In case at any time the Trustee
shall cease to be eligible in accordance with the provisions of this Section
6.9, the Trustee shall resign immediately in the manner and with the effect
specified in Section 6.10.

      A different Trustee may be appointed by the Issuer for any series of
Securities prior to the issuance of such Securities. If the initial Trustee for
any series of Securities is to be a trustee other than The Bank of New York, the
Issuer and such Trustee shall, prior to the issuance of such Securities, execute
and deliver an indenture supplemental hereto, which shall provide for the
appointment of such Trustee as Trustee for the Securities of such series and
shall add to or change any of the provisions of this Indenture as shall be
necessary to provide for or facilitate the administration of the trusts
hereunder by more than one Trustee, it being understood that nothing herein or
in such supplemental indenture shall constitute such Trustees co-trustees of the
same trust and that each such Trustee shall be trustee of a trust or trusts
hereunder separate and apart from any trust or trusts hereunder administered by
any other such Trustee.

      SECTION 6.10 Resignation and Removal; Appointment of Successor Trustee.
(a) The Trustee, or any trustee or trustees hereafter appointed, may at any time
resign with respect to one or more or all series of Securities by giving written
notice of resignation to the Issuer. Upon receiving such notice of resignation,
the Issuer shall promptly appoint a successor trustee or trustees with respect
to the applicable series by written instrument in duplicate, executed by
authority of the Board of Directors, one copy of which instrument shall be
delivered to the resigning trustee and one copy to the successor trustee or
trustees. If no successor trustee shall have been so appointed with respect to
any series and have accepted appointment within 30 days after the mailing of
such notice of resignation, the resigning trustee may petition any court of
competent jurisdiction for the appointment of a successor trustee, or any
Securityholder who has been a bona fide Holder of a Security or Securities of
the applicable series for at least six months may, subject to the provisions of
Article Five, on behalf of himself and all others similarly situated, petition
any such court for the appointment of a successor trustee. Such court may
thereupon, after such notice, if any, as it may deem proper and prescribe,
appoint a successor trustee.

      (b)   In case at any time any of the following shall occur:

           (i)   the Trustee shall fail to comply with the provisions of Section
      6.8 with respect to any series of Securities after written request
      therefor by the Issuer or by any Securityholder who has been a bona fide
      Holder of a Security or Securities of such series for at least six months;
      or

          (ii)  the Trustee shall cease to be eligible in accordance with the
      provisions of Section 6.9 and shall fail to resign after written request
      therefor by the Issuer or by any such Securityholder; or

         (iii)  the Trustee shall become incapable of acting with respect to any
      series of Securities, or shall be adjudged a bankrupt or insolvent, or a
      receiver or liquidator of the

                                      -38-
<PAGE>   46
      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, the Issuer may remove the Trustee with respect to the
applicable series of Securities and appoint a successor trustee for such series
by written instrument, in duplicate, executed by order of the Board of Directors
one copy of which instrument shall be delivered to the Trustee so removed and
one copy to the successor trustee, or, subject to the provisions of Article
Five, any Securityholder who has been a bona fide Holder of a Security or
Securities 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 removal of the Trustee and the appointment of a successor trustee with
respect to such series. Such court may thereupon, after such notice, if any, as
it may deem proper and prescribe, remove the Trustee and appoint a successor
trustee.

      (c) The Holders of a majority in aggregate principal amount of the
Securities of each series then Outstanding may at any time remove the Trustee
with respect to Securities of such series and appoint a successor trustee with
respect to the Securities of such series by delivering to the Trustee so
removed, to the successor trustee so appointed and to the Issuer the evidence
provided for in Section 7.1 of the action in that regard taken by the
Securityholders. If no successor trustee shall have been so appointed with
respect to any series and have accepted appointment within 30 days after the
delivery of such evidence of removal, the Trustee may petition any court of
competent jurisdiction for the appointment of a successor trustee, or any
Securityholder who has been a bona fide Holder of a Security or Securities of
the applicable series for at least six months may, subject to the provisions of
Section 5.9, on behalf of himself and all others similarly situated, petition
any such court for the appointment of a successor trustee. Such court may
thereupon, after such notice, if any, as it may deem proper and prescribe,
appoint a successor trustee.

      (d) Any resignation or removal of the Trustee with respect to any series
and any appointment of a successor trustee with respect to such series pursuant
to any of the provisions of this Section 6.10 shall become effective upon
acceptance of appointment by the successor trustee as provided in Section 6.11.

      SECTION 6.11 Acceptance of Appointment by Successor Trustee. Any successor
trustee appointed as provided in Section 6.10 shall execute and deliver to the
Issuer and to its predecessor trustee an instrument accepting such appointment
hereunder, and thereupon the resignation or removal of the predecessor trustee
with respect to all or any applicable series shall become effective and such
successor trustee, without any further act, deed or conveyance, shall become
vested with all rights, powers, duties and obligations with respect to such
series of its predecessor hereunder, with like effect as if originally named as
trustee for such series hereunder; but, nevertheless, on the written request of
the Issuer or of the successor trustee, upon payment of its charges then unpaid,
the trustee ceasing to act shall, subject to Section 10.4, pay over to the
successor trustee all moneys at the time held by it hereunder and shall execute
and deliver an instrument transferring to such successor trustee all such
rights, powers, duties and obligations. Upon request of any such successor
trustee, the Issuer shall execute any and all instruments in

                                      -39-
<PAGE>   47

writing for more fully and certainly vesting in and confirming to such successor
trustee all such rights, powers, duties and obligations. Any trustee ceasing to
act shall, nevertheless, retain a prior claim upon all property or funds held or
collected by such trustee to secure any amounts then due it pursuant to the
provisions of Section 6.6.

      If a successor trustee is appointed with respect to the Securities of one
or more (but not all) series, the Issuer, the predecessor Trustee and each
successor trustee with respect to the Securities of any applicable series shall
execute and deliver an indenture supplemental hereto which shall contain such
provisions as shall be deemed necessary or desirable to confirm that all the
rights, powers, trusts and duties of the predecessor Trustee with respect to the
Securities of any series as to which the predecessor Trustee is not retiring
shall continue to be vested in the predecessor Trustee, and shall add to or
change any of the provisions of this Indenture as shall be necessary to provide
for or facilitate the administration of the trusts hereunder by more than one
trustee, it being understood that nothing herein or in such supplemental
indenture shall constitute such trustees co-trustees of the same trust and that
each such trustee shall be trustee of a trust or trusts under separate
indentures.

      No successor trustee with respect to any series of Securities shall accept
appointment as provided in this Section 6.11 unless at the time of such
acceptance such successor trustee shall be qualified under the provisions of
Section 6.8 and eligible under the provisions of Section 6.9.

      Upon acceptance of appointment by any successor trustee as provided in
this Section 6.11, the Issuer shall give notice thereof to the Holders of
Securities of each series affected, by mailing such notice to such Holders at
their addresses as they shall appear on the registry books. If the Issuer fails
to give such notice within ten days after acceptance of appointment by the
successor trustee, the successor trustee shall cause such notice to be given at
the expense of the Issuer.

      SECTION 6.12 Merger, Conversion, Consolidation or Succession to Business
of Trustee. Any corporation into which the Trustee may be merged or converted or
with which it may be consolidated, or any corporation resulting from any merger,
conversion or consolidation to which the Trustee shall be a party, or any
corporation succeeding to all or substantially all of the corporate trust
business of the Trustee, shall be the successor of the Trustee hereunder,
provided that such corporation shall be qualified under the provisions of
Section 6.8 and eligible under the provisions of Section 6.9, without the
execution or filing of any paper or any further act on the part of any of the
parties hereto, anything herein to the contrary notwithstanding.

      In case at the time such successor to the Trustee shall succeed to the
trusts created by this Indenture any of the Securities of any series shall have
been authenticated but not delivered, any such successor to the Trustee may
adopt the certificate of authentication of any predecessor Trustee and deliver
such Securities so authenticated; and, in case at that time any of the
Securities of any series shall not have been authenticated, any successor to the
Trustee may authenticate such Securities either in the name of any predecessor
hereunder or in the name of the successor Trustee; and in all such cases such
certificate shall have the full force which it is granted anywhere in the
Securities of such series or in this Indenture; provided that the right to

                                      -40-
<PAGE>   48

adopt the certificate of authentication of any predecessor Trustee or to
authenticate Securities of any series in the name of any predecessor Trustee
shall apply only to its successor or successors by merger, conversion or
consolidation.

      SECTION 6.13 Preferential Collection of Claims Against the Issuer. The
Trustee shall comply with Section 31l(a) of the Trust Indenture Act of 1939,
excluding any creditor relationship listed in Section 31l(b) of the Trust
Indenture Act of 1939. A Trustee who has resigned or been removed shall be
subject to Section 311(a) of the Trust Indenture Act of 1939 to the extent
indicated therein.

      SECTION 6.14 Appointment of Authenticating Agent. As long as any
Securities of a series remain Outstanding, the Trustee may, by an instrument in
writing, appoint with the approval of the Issuer an authenticating agent (the
"Authenticating Agent") which shall be authorized to act on behalf of the
Trustee to authenticate Securities, including Securities issued upon exchange,
registration of transfer, partial redemption or pursuant to Section 2.9.
Securities of each such series authenticated by such Authenticating Agent shall
be entitled to the benefits of this Indenture and shall be valid and obligatory
for all purposes as if authenticated by the Trustee. Whenever reference is made
in this Indenture to the authentication and delivery of Securities of any series
by the Trustee or to 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 for such series and a Certificate of Authentication
executed on behalf of the Trustee by such Authenticating Agent. Such
Authenticating Agent shall at all times be a corporation organized and doing
business under the laws of the United States of America or of any state or the
District of Columbia, authorized under such laws to exercise corporate trust
powers, having a combined capital and surplus of at least $25,000,000
(determined as provided in Section 6.9 with respect to the Trustee) and subject
to supervision or examination by federal or state authority.

      Any corporation into which any 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 any Authenticating Agent
shall be a party, or any corporation succeeding to the corporate agency business
of any Authenticating Agent, shall, subject to meeting the eligibility
requirements for an Authenticating Agent set forth above, continue to be the
Authenticating Agent with respect to all series of Securities for which it
served as Authenticating Agent without the execution or filing of any paper or
any further act on the part of the Trustee or such Authenticating Agent. Any
Authenticating Agent may at any time, and if it shall cease to be eligible
shall, resign by giving written notice of resignation to the Trustee and to the
Issuer. 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
Issuer.

      Upon receiving such a notice of resignation or upon such a termination, or
in case at any time any Authenticating Agent shall cease to be eligible in
accordance with the provisions of this Section 6.14 with respect to one or more
series of Securities, the Trustee may appoint a successor Authenticating Agent
which shall be acceptable to the Issuer and the Issuer shall provide notice of
such appointment to all Holders of Securities of such series in the manner and
to the extent

                                      -41-
<PAGE>   49

provided in Section 11.4. Any successor Authenticating Agent upon acceptance of
its appointment hereunder shall become vested with all rights, powers, duties
and responsibilities of its predecessor hereunder, with like effect as if
originally named as Authenticating Agent. The Issuer agrees to pay to the
Authenticating Agent for such series from time to time reasonable compensation.
The Authenticating Agent for the Securities of any series shall have no
responsibility or liability for any action taken by it as such at the direction
of the Trustee.

      Sections 6.2, 6.3, 6.4 and 7.3 shall be applicable to any Authenticating
Agent.

                                 ARTICLE SEVEN
                         CONCERNING THE SECURITYHOLDERS

      SECTION 7.1 Evidence of Action Taken by Securityholders. Any request,
demand, authorization, direction, notice, consent, waiver or other action
provided by this Indenture to be given or taken by a specified percentage in
principal amount of the Securityholders of any or all series may be embodied in
and evidenced by one or more instruments of substantially similar tenor signed
by such specified percentage of Securityholders 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. Proof of execution of any instrument or of a writing appointing
any such agent shall be sufficient for any purpose of this Indenture and
(subject to Sections 6.1 and 6.2) conclusive in favor of the Trustee and the
Issuer, if made in the manner provided in this Article Seven.

      SECTION 7.2 Proof of Execution of Instruments and of Holding of
Securities. Subject to Sections 6.1 and 6.2, the execution of any instrument by
a Securityholder or his agent or proxy may be proved in the following manner:

            (a)   The fact and date of the execution by any Holder of any
      instrument may be proved by the certificate of any notary public or other
      officer of any jurisdiction authorized to take acknowledgments of deeds or
      administer oaths that the person executing such instruments acknowledged
      to him the execution thereof, or by an affidavit of a witness to such
      execution sworn to before any such notary or other such officer.  Where
      such execution is by or on behalf of any legal entity other than an
      individual, such certificate or affidavit shall also constitute sufficient
      proof of the authority of the person executing the same.

            (b)   The ownership of Securities shall be proved by the Security
      register or by a certificate of the Security registrar.

      SECTION 7.3 Holders to be Treated as Owners. The Issuer, the Trustee and
any agent of the Issuer or the Trustee may deem and treat the Person in whose
name any Security shall be registered upon the Security register for such series
as the absolute owner of such Security (whether or not such Security shall be
overdue and notwithstanding any notation of ownership or other writing thereon)
for the purpose of receiving payment of or on account of the principal of and,
subject to the provisions of this Indenture, interest, if any, on such Security
and for all other

                                      -42-
<PAGE>   50

purposes; and neither the Issuer nor the Trustee nor any agent
of the Issuer or the Trustee shall be affected by any notice to the contrary.

      SECTION 7.4 Securities Owned by Issuer Deemed Not Outstanding. In
determining whether the Holders of the requisite aggregate principal amount of
Outstanding Securities of any or all series have concurred in any direction,
consent or waiver under this Indenture, Securities which are owned by the Issuer
or any other obligor on the Securities with respect to which such determination
is being made or by any Affiliate of the Issuer or by any other obligor on the
Securities with respect to which such determination is being made shall be
disregarded and deemed not to be Outstanding for the purpose of any such
determination, except that for the purpose of determining whether the Trustee
shall be protected in relying on any such direction, consent or waiver only
Securities which a Responsible Officer of the Trustee knows are so owned shall
be so disregarded. Securities so owned which have been pledged in good faith may
be regarded as Outstanding if the pledgee establishes to the satisfaction of the
Trustee the pledgee's right so to act with respect to such Securities and that
the pledgee is not the Issuer or any other obligor upon the Securities or any
Affiliate of the Issuer or any other obligor on the Securities. In case of a
dispute as to such right, the advice of counsel shall be full protection in
respect of any decision made by the Trustee in accordance with such advice. Upon
request of the Trustee, the Issuer shall furnish to the Trustee promptly an
Officers' Certificate listing and identifying all Securities, if any, known by
the Issuer to be owned or held by or for the account of any of the
above-described Persons; and, subject to Sections 6.1 and 6.2, the Trustee shall
be entitled to accept such Officers' Certificate as conclusive evidence of the
facts therein set forth and of the fact that all Securities not listed therein
are Outstanding for the purpose of any such determination.

      SECTION 7.5 Right of Revocation of Action Taken. At any time prior to (but
not after) the evidencing to the Trustee, as provided in Section 7.1, of the
taking of any action by the Holders of the percentage in aggregate principal
amount of the Securities of any or all series, as the case may be, specified in
this Indenture in connection with such action, any Holder of a Security the
serial number of which is shown by the evidence to be included among the serial
numbers of the Securities the Holders of which have consented to such action
may, by filing written notice at the Corporate Trust Office and upon proof of
holding as provided in this Article Seven, revoke such action so far as concerns
such Security; provided that such revocation shall not become effective until
three Business Days after such filing. Except as aforesaid, any such action
taken by the Holder of any Security shall be conclusive and binding upon such
Holder and upon all future Holders and owners of such Security and of any
Securities issued in exchange or substitution therefor or on registration of
transfer thereof, irrespective of whether or not any notation in regard thereto
is made upon any such Security. Any action taken by the Holders of the
percentage in aggregate principal amount of the Securities of any or all series,
as the case may be, specified in this Indenture in connection with such action
shall be conclusively binding upon the Issuer, the Trustee and the Holders of
all the Securities affected by such action.

      SECTION 7.6 Record Date for Consents and Waivers. The Issuer may, but
shall not be obligated to, establish a record date for the purpose of
determining the Persons entitled to (a) waive any past Event of Default with
respect to the Securities of such series in accordance with

                                      -43-
<PAGE>   51

Section 5.7 of the Indenture, (b) consent to any supplemental indenture in
accordance with Section 8.2 of the Indenture or (c) waive compliance with any
term, condition or provision of any covenant hereunder. If a record date is
fixed, the Holders on such record date, or their duly designated proxies, and
any such Persons, shall be entitled to waive any such past default, consent to
any such supplemental indenture or waive compliance with any such term,
condition or provision, whether or not such Holder remains a Holder after such
record date; provided, however, that unless such waiver or consent is obtained
from the Holders, or duly designated proxies, of the requisite principal amount
of Outstanding Securities of such series prior to the date which is the 180th
day after such record date, any such waiver or consent previously given shall
automatically, and without further action by any Holder, be cancelled and of no
further effect.

                                 ARTICLE EIGHT
                             SUPPLEMENTAL INDENTURES

      SECTION 8.1 Supplemental Indentures Without Consent of Securityholders.
The Issuer, when authorized by a Board Resolution (which resolution may provide
general terms or parameters for such action and may provide that the specific
terms of such action may be determined in accordance with or pursuant to an
Issuer Order), and the Trustee may from time to time and at any time enter into
an indenture or indentures supplemental hereto (which shall conform to the
provisions of the Trust Indenture Act of 1939 as in force at the date of the
execution thereof) for one or more of the following purposes:

            (a)   to convey, transfer, assign, mortgage or pledge to the Trustee
      as security for the Securities of one or more series any property or
      assets;

            (b)   to evidence the succession of another Person to the Issuer, or
      successive successions, and the assumption by the successor Person of the
      covenants, agreements and obligations of the Issuer pursuant to Article
      Nine;

            (c)   to add to the covenants of the Issuer such further covenants,
      restrictions, conditions or provisions as the Issuer and the Trustee
      shall consider to be for the protection of the Holders of all or any
      series of Securities (and if such covenants, restrictions, conditions
      or provisions are to be for the protection of less than all series of
      Securities, stating that the same are expressly being included solely
      for the protection of such series) and to make the occurrence, or the
      occurrence and continuance, of a Default in any such additional
      covenants, restrictions, conditions or provisions an Event of Default
      permitting the enforcement of all or any of the several remedies
      provided in this Indenture as herein set forth; provided, however, that
      in respect of any such additional covenant, restriction, condition or
      provision such supplemental indenture may provide for a particular
      period of grace after Default (which period may be shorter or longer
      than that allowed in the case of other Defaults) or may provide for an
      immediate enforcement upon such an Event of Default or may limit the
      remedies available to the Trustee upon such an Event of Default or may
      limit the right of the Holders of a majority in aggregate principal
      amount of the Securities of such series to waive such an Event of
      Default;

                                      -44-
<PAGE>   52

            (d)   to cure any ambiguity or to correct or supplement any
      provision contained herein or in any supplemental indenture which may be
      defective or inconsistent with any other provision contained herein or in
      any supplemental indenture, or to make any other provisions as the Issuer
      may deem necessary or desirable; provided, however, that no such action
      shall materially adversely affect the interests of the Holders of the
      Securities;

            (e)   to establish the form or terms of Securities of any series as
      permitted by Sections 2.1 and 2.3;

            (f)   to provide for the issuance of Securities of any series in
      coupon form (including Securities registrable as to principal only) and to
      provide for exchangeability of such Securities for the Securities issued
      hereunder in fully registered form and to make all appropriate changes for
      such purpose;

            (g)   to modify, eliminate or add to the provisions of this
      Indenture to such extent as shall be necessary to effect the qualification
      of this Indenture under the Trust Indenture Act of 1939, or under any
      similar federal statute hereafter enacted, and to add to this Indenture
      such other provisions as may be expressly permitted by the Trust Indenture
      Act of 1939, excluding, however, the provisions referred to in Section
      316(a)(2) of the Trust Indenture Act of 1939 as in effect at the date
      as of which this instrument was executed or any corresponding provision
      provided for in any similar federal statute hereafter enacted;

            (h)   to evidence and provide for the acceptance of appointment
      hereunder of a Trustee other than The Bank of New York as Trustee for a
      series of Securities 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 6.9 hereof;

            (i)   subject to Section 8.2 hereof, to add to or modify the
      provisions hereof as may be necessary or desirable to provide for the
      denomination of Securities in foreign currencies which shall not adversely
      affect the interests of the Holders of the Securities in any material
      respect;

            (j)   to modify the covenants or Events of Default of the Issuer
      solely in respect of, or add new covenants or Events of Default of the
      Issuer that apply solely to, Securities not Outstanding on the date of
      such supplemental indenture; and

            (k)   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 6.11.

      The Trustee is hereby authorized to join with the Issuer in the execution
of any such supplemental indenture, to make any further appropriate agreements
and stipulations which may

                                      -45-
<PAGE>   53

be therein contained and to accept the conveyance, transfer, assignment,
mortgage or pledge of any property thereunder, but the Trustee shall not be
obligated to enter into any such supplemental indenture which affects the
Trustee's own rights, duties or immunities under this Indenture or otherwise.

      Any supplemental indenture authorized by the provisions of this Section
may be executed without the consent of the Holders of any of the Securities then
Outstanding, notwithstanding any of the provisions of Section 8.2.

      SECTION 8.2 Supplemental Indentures with Consent of Securityholders. With
the consent (evidenced as provided in Article Seven) of the Holders of not less
than a majority in aggregate principal amount of the Securities then Outstanding
of any series affected by such supplemental indenture, the Issuer, when
authorized by a Board Resolution (which resolution may provide general terms or
parameters for such action and may provide that the specific terms of such
action may be determined in accordance with or pursuant to an Issuer Order), and
the Trustee may, from time to time and at any time, enter into an indenture or
indentures supplemental hereto (which shall conform to the provisions of the
Trust Indenture Act of 1939 as in force at the date of execution thereof) for
the purpose of adding any provisions to or changing in any manner or eliminating
any of the provisions of this Indenture or of any supplemental indenture or of
modifying in any manner the rights of the Holders of the Securities of such
series; provided that no such supplemental indenture shall (a) extend the stated
final maturity of the principal of any Security, or reduce the principal amount
thereof, or reduce the rate or extend the time of payment of interest, if any,
thereon (or, in the case of an Original Issue Discount Security, reduce the rate
of accretion of original issue discount thereon), or reduce or alter the method
of computation of any amount payable on redemption, repayment or purchase by the
Issuer thereof (or the time at which any such redemption, repayment or purchase
may be made), or make the principal thereof (including any amount in respect of
original issue discount), or interest, if any, thereon payable in any coin or
currency other than that provided in the Securities or in accordance with the
terms of the Securities, or reduce the amount of the principal of an Original
Issue Discount Security that would be due and payable upon an acceleration of
the maturity thereof or the amount thereof provable in bankruptcy in each case
pursuant to Section Article Five, or impair or affect the right of any
Securityholder to institute suit for the payment thereof or, if the Securities
provide therefor, any right of repayment or purchase at the option of the
Securityholder, in each case without the consent of the Holder of each Security
so affected, or (b) reduce the aforesaid percentage of Securities of any series,
the consent of the Holders of which is required for any such supplemental
indenture, without the consent of the Holders of each Security so affected. No
consent of any Holder of any Security shall be necessary under this Section 8.2
to permit the Trustee and the Issuer to execute supplemental indentures pursuant
to Sections 8.1 and 9.2.

      A supplemental indenture which changes or eliminates any covenant, Event
of Default or other provision of this Indenture which has expressly been
included solely for the benefit of one or more particular series of Securities,
or which modifies the rights of Holders of Securities of such series, with
respect to such covenant or provision, shall be deemed not to affect the rights
under this Indenture of the Holders of Securities of any other series.

                                      -46-
<PAGE>   54

      Upon the request of the Issuer, accompanied by a copy of a resolution of
the Board of Directors (which resolution may provide general terms or parameters
for such action and may provide that the specific terms of such action may be
determined in accordance with or pursuant to an Issuer Order) certified by the
secretary or an assistant secretary of the Issuer authorizing the execution of
any such supplemental indenture, and upon the filing with the Trustee of
evidence of the consent of the Holders of the Securities as aforesaid and other
documents, if any, required by Section 7.1, the Trustee shall join with the
Issuer in the execution of such supplemental indenture unless such supplemental
indenture affects the Trustee's own rights, duties or immunities under this
Indenture or otherwise, in which case the Trustee may at its discretion, but
shall not be obligated to, enter into such supplemental indenture.

      It shall not be necessary for the consent of the Securityholders under
this Section 8.2 to approve the particular form of any proposed supplemental
indenture, but it shall be sufficient if such consent shall approve the
substance thereof.

      Promptly after the execution by the Issuer and the Trustee of any
supplemental indenture pursuant to the provisions of this Section 8.2, the
Issuer (or the Trustee at the request and expense of the Issuer) shall give
notice thereof to the Holders of then Outstanding Securities of each series
affected thereby, as provided in Section 11.4. Any failure of the Issuer to give
such notice, or any defect therein, shall not, however, in any way impair or
affect the validity of any such supplemental indenture.

      SECTION 8.3 Effect of Supplemental Indenture. Upon the execution of any
supplemental indenture pursuant to the provisions hereof, this Indenture shall
be and shall be deemed to be modified and amended in accordance therewith and
the respective rights, limitations of rights, obligations, duties and immunities
under this Indenture of the Trustee, the Issuer and the Holders of Securities of
each series affected thereby shall thereafter be determined, exercised and
enforced hereunder subject in all respects to such modifications and amendments,
and all the terms and conditions of any such supplemental indenture shall be and
shall be deemed to be part of the terms and conditions of this Indenture for any
and all purposes.

      SECTION 8.4 Documents to Be Given to Trustee. The Trustee, subject to the
provisions of Sections 6.1 and 6.2, shall be entitled to receive an Officers'
Certificate and an Opinion of Counsel as conclusive evidence that any
supplemental indenture executed pursuant to this Article Eight complies with the
applicable provisions of this Indenture and that all conditions precedent to the
execution and delivery of such supplemental indenture have been satisfied.

      SECTION 8.5 Notation on Securities in Respect of Supplemental Indentures.
Securities of any series authenticated and delivered after the execution of any
supplemental indenture pursuant to the provisions of this Article Eight may bear
a notation in form approved by the Trustee for such series as to any matter
provided for by such supplemental indenture or as to any action taken by
Securityholders. If the Issuer or the Trustee shall so determine, new Securities
of any series so modified as to conform, in the opinion of the Trustee and the
Issuer, to any modification of this Indenture contained in any such supplemental
indenture may be prepared by

                                      -47-
<PAGE>   55

the Issuer, authenticated by the Trustee and delivered in exchange for the
Securities of such series then Outstanding.

                                  ARTICLE NINE
                                   SUCCESSORS

      SECTION 9.1 When Issuer May Merge, etc. The Issuer may not consolidate or
merge with any other Person or sell, convey, assign, transfer, lease or
otherwise dispose of all or substantially all its properties and assets as an
entirety in one transaction or a series of transactions to any Person, unless:

            (a)   either (i) the Issuer shall be the continuing corporation or
      (ii) such Person shall be a corporation, partnership, limited liability
      company or trust organized and validly existing under the laws of the
      United States or any state thereof or the District of Columbia, and shall
      expressly assume by a supplemental indenture all the Issuer's obligations
      under the Securities and this Indenture; and

            (b)   immediately before and after such transaction or each element
      of such series of transactions, no Default or Event of Default shall have
      occurred and be continuing.

      The Issuer shall deliver to the Trustee prior to the consummation of the
proposed transaction an Officers' Certificate to the foregoing effect and an
Opinion of Counsel stating that the proposed transaction and such supplemental
indenture comply with this Indenture.

      SECTION 9.2 Successor Corporation Substituted. Upon any consolidation or
merger, or any sale, lease, conveyance or other disposition of all or
substantially all of the assets of the Issuer or any assignment of its
obligations under this Indenture or the Securities in accordance with Section
9.1, the successor corporation formed by such consolidation or into or with
which the Issuer is merged or to which such sale, lease, conveyance or other
disposition or assignment is made shall succeed to, and be substituted for, and
may exercise, every right and power of, the Issuer under this Indenture with the
same effect as if such successor corporation had been named as the Issuer
herein; and, except in the case of a lease, the predecessor corporation shall be
relieved of all obligations and covenants under this Indenture and the
Securities.

                                  ARTICLE TEN
                    SATISFACTION AND DISCHARGE OF INDENTURE;
                      COVENANT DEFEASANCE; UNCLAIMED MONEYS

      SECTION 10.1 Satisfaction and Discharge of Indenture; Covenant Defeasance.

      (A) If at any time (a) the Issuer shall have paid or caused to be paid the
principal of, premium, if any, and interest, if any, on all the Securities
Outstanding (other than

                                      -48-
<PAGE>   56

Securities which have been destroyed, lost or stolen and which have been
replaced or paid as provided in Section 2.9) as and when the same shall have
become due and payable, or (b) the Issuer shall have delivered to the Trustee
for cancellation all Securities theretofore authenticated (other than Securities
which have been destroyed, lost or stolen and which have been replaced or paid
as provided in Section 2.9); and if, in any such case, the Issuer shall also pay
or cause to be paid all other sums payable hereunder by the Issuer (including
all amounts payable, to the Trustee pursuant to Section 6.6), then this
Indenture shall cease to be of further effect, and the Trustee, on demand of the
Issuer accompanied by an Officers' Certificate and an Opinion of Counsel, each
stating that all conditions precedent relating to the satisfaction and discharge
contemplated by this provision have been complied with, and at the cost and
expense of the Issuer, shall execute proper instruments acknowledging such
satisfaction and discharging this Indenture. The Issuer agrees to reimburse the
Trustee for any costs or expenses thereafter reasonably and properly incurred,
and to compensate the Trustee for any services thereafter reasonably and
properly rendered, by the Trustee in connection with this Indenture or the
Securities.

      (B) If at any time (a) the Issuer shall have paid or caused to be paid the
principal of, premium, if any, and interest, if any, on all the Securities of
any series Outstanding (other than Securities of such series which have been
destroyed, lost or stolen and which have been replaced or paid as provided in
Section 2.9) as and when the same shall have become due and payable, or (b) the
Issuer shall have delivered to the Trustee for cancellation all Securities of
any series theretofore authenticated (other than any Securities of such series
which have been destroyed, lost or stolen and which have been replaced or paid
as provided in Section 2.9), or (c) in the case of any series of Securities with
respect to which the exact amount described in clause (ii) below can be
determined at the time of making the deposit referred to in such clause (ii),
(i) all the Securities of such series not theretofore delivered to the Trustee
for cancellation shall have become due and payable, or by their terms are to
become due and payable within one year or are to be called for redemption within
one year under arrangements satisfactory to the Trustee for the giving of notice
of redemption, and (ii) the Issuer shall have irrevocably deposited or caused to
be deposited with the Trustee as funds in trust, specifically pledged as
security for, and dedicated solely to, the benefit of the Holders of Securities
of such series, cash in an amount (other than moneys repaid by the Trustee or
any paying agent to the Issuer in accordance with Section 10.4) or non-callable,
non-prepayable bonds, notes, bills or other similar obligations issued or
guaranteed by the United States government or any agency thereof the full and
timely payment of which are backed by the full faith and credit of the United
States ("U.S. Government Obligations"), maturing as to principal and interest,
if any, at such times and in such amounts as will insure the availability of
cash, or a combination thereof, sufficient in the opinion of a nationally
recognized firm of independent public accountants expressed in a written
certification thereof delivered to the Trustee, to pay (1) the principal of,
premium, if any, and interest, if any, on all Securities of such series on each
date that such principal of, premium, if any, or interest, if any, is due and
payable, and (2) any mandatory sinking fund payments on the dates on which such
payments are due and payable in accordance with the terms of the Indenture and
the Securities of such series; then the Issuer shall be deemed to have paid and
discharged the entire indebtedness on all the Securities of such series on the
date of the deposit referred to in clause (ii) above and the provisions of this
Indenture with respect to the Securities of such series shall no longer be in
effect (except, in the case of clause (c) of this Section 10.1(B), as to (i)
rights of registration of transfer and exchange of Securities of such series,
(ii) rights of substitution of mutilated, defaced, destroyed, lost or stolen
Securities of such series, (iii) rights of Holders of Securities of such series
to receive payments of principal thereof and premium, if any, and

                                      -49-
<PAGE>   57

interest, if any, thereon upon the original stated due dates therefor (but not
upon acceleration), and remaining rights of the Holders of Securities of such
series to receive mandatory sinking fund payments thereon, if any, when due,
(iv) the rights, obligations, duties and immunities of the Trustee hereunder,
(v) the rights of the Holders of Securities of such series as beneficiaries
hereof with respect to the property so deposited with the Trustee payable to all
or any of them and (vi) the obligations of the Issuer under Section 3.2 with
respect to Securities of such series) and the Trustee, on demand of the Issuer
accompanied by an Officers' Certificate and an Opinion of Counsel, each stating
that all conditions precedent contemplated by this provision have been complied
with, and at the cost and expense of the Issuer, shall execute proper
instruments acknowledging the same.

      (C) The following provisions shall apply to the Securities of each series
unless specifically otherwise provided in a Board Resolution, Officers'
Certificate or indenture supplemental hereto provided pursuant to Section 2.3.
In addition to discharge of the Indenture pursuant to the next preceding
paragraph, in the case of any series of Securities with respect to which the
exact amount described in subparagraph (a) below can be determined at the time
of making the deposit referred to in such subparagraph (a), the Issuer shall be
deemed to have paid and discharged the entire indebtedness on all the Securities
of such a series on the 91st day after the date of the deposit referred to in
subparagraph (a) below, and the provisions of this Indenture with respect to the
Securities of such series shall no longer be in effect (except as to (i) rights
of registration of transfer and exchange of Securities of such series, (ii)
substitution of mutilated, defaced, destroyed, lost or stolen Securities of such
series, (iii) rights of Holders of Securities of such series to receive payments
of principal thereof, premium, if any, and interest, if any, thereon upon the
original stated due dates therefor (but not upon acceleration), and remaining
rights of the Holders of Securities of such series to receive mandatory sinking
fund payments, if any, (iv) the rights, obligations, duties and immunities of
the Trustee hereunder, (v) the rights of the Holders of Securities of such
series as beneficiaries hereof with respect to the property so deposited with
the Trustee payable to all or any of them and (vi) the obligations of the Issuer
under Section 3.2 with respect to Securities of such series) and the Trustee, on
demand of the Issuer accompanied by an Officers' Certificate and an Opinion of
Counsel, each stating that all conditions precedent contemplated by this
provision have been complied with, and at the cost and expense of the Issuer,
shall execute proper instruments acknowledging the same, if

            (a) with reference to this provision the Issuer has irrevocably
      deposited or caused to be irrevocably deposited with the Trustee as funds
      in trust, specifically pledged as security for, and dedicated solely to,
      the benefit of the Holders of Securities of such series (i) cash in an
      amount, or (ii) U.S. Government Obligations, maturing as to principal and
      interest, if any, at such times and in such amounts as will insure the
      availability of cash, or (iii) a combination thereof, sufficient, in the
      opinion of a nationally recognized firm of independent public accountants
      expressed in a written certification thereof delivered to the Trustee, to
      pay (A) the principal of, premium, if any, and interest, if any, on all
      Securities of such series on each date that such principal or interest, if
      any, is due and payable, and (B) any mandatory sinking fund payments on
      the dates on which such payments are due and payable in accordance with
      the terms of the Indenture and the Securities of such series;

                                      -50-
<PAGE>   58

            (b) such deposit will not result in a breach or violation of, or
      constitute a default under, any agreement or instrument to which the
      Issuer is a party or by which it is bound; and

            (c) the Issuer has delivered to the Trustee an Opinion of Counsel
      based on the fact that (x) the Issuer has received from, or there has been
      published by, the Internal Revenue Service a ruling or (y), since the date
      hereof, there has been a change in the applicable United States federal
      income tax law, in either case to the effect that and such opinion shall
      confirm that, the Holders of the Securities of such series will not
      recognize income, gain or loss for Federal income tax purposes as a result
      of such deposit, defeasance and discharge and will be subject to Federal
      income tax on the same amount and in the same manner and at the same
      times, as would have been the case if such deposit, defeasance and
      discharge had not occurred.

      (D) The following provisions shall apply to the Securities of each series
unless specifically otherwise provided in a Board Resolution, Officers'
Certificate or indenture supplemental hereto provided pursuant to Section 2.3.
In addition to the foregoing, in the case of any series of Securities with
respect to which the exact amount described in subparagraph (a) below can be
determined at the time of making the deposit referred to in such subparagraph
(a), the Issuer shall be deemed to be, and shall be, released from its
obligations under Sections 3.6 and 3.7 hereof on the 91st day after the date of
the deposit referred to in subparagraph (a) below, and the Issuer's obligations
under all Securities of such series and this Indenture with respect to Sections
3.6 and 3.7 hereof shall thereafter be deemed to be discharged for the purposes
of any direction, waiver, consent or declaration (and the consequences of any
thereof) in connection therewith but shall continue in full force and effect for
all other purposes hereunder, and the Trustee, on demand of the Issuer
accompanied by an Officers' Certificate and an Opinion of Counsel, each stating
that all conditions precedent contemplated by this provision have been complied
with, and at the cost and expense of the Issuer, shall execute proper
instruments acknowledging the same, if

            (a) with reference to this provision the Issuer has irrevocably
      deposited or caused to be irrevocably deposited with the Trustee as funds
      in trust, specifically pledged as security for, and dedicated solely to,
      the benefit of the Holders of Securities of such series (i) cash in an
      amount, or (ii) U.S. Government Obligations, maturing as to principal and
      interest, if any, at such times and in such amounts as will insure the
      availability of cash, or (iii) a combination thereof, sufficient, in the
      opinion of a nationally recognized firm of independent public accountants
      expressed in a written certification thereof delivered to the Trustee, to
      pay (A) the principal of, premium, if any, and interest, if any, on all
      Securities of such series on each date that such principal or interest, if
      any, is due and payable, and (B) any mandatory sinking fund payments on
      the dates on which such payments are due and payable in accordance with
      the terms of the Indenture and the Securities of such series; and

                                      -51-
<PAGE>   59

            (b) such deposit will not result in a breach or violation of, or
      constitute a default under, any agreement or instrument to which the
      Issuer is a party or by which it is bound; and

            (c) the Issuer has delivered to the Trustee an Opinion of Counsel to
      the effect that, and such opinion shall confirm that, the Holders of the
      Securities of such series will not recognize income, gain or loss for
      Federal income tax purposes as a result of such deposit, defeasance and
      discharge and will be subject to Federal income tax on the same amount and
      in the same manner and at the same times, as would have been the case if
      such deposit, defeasance and discharge had not occurred.

      SECTION 10.2 Application by Trustee of Funds Deposited for Payment of
Securities. Subject to Section 10.4, all moneys and U.S. Government Obligations
deposited with the Trustee pursuant to Section 10.1 shall be held in trust, and
such moneys and all moneys from such U.S. Government Obligations shall be
applied by it to the payment, either directly or through any paying agent
(including the Issuer acting as its own paying agent), to the Holders of the
particular Securities of such series for the payment or redemption of which such
moneys and U.S. Government Obligations have been deposited with the Trustee, of
all sums due and to become due thereon for principal and interest, if any, but
such moneys and U.S. Government Obligations need not be segregated from other
funds except to the extent required by law.

      SECTION 10.3 Repayment of Moneys Held by Paying Agent. In connection with
the satisfaction and discharge of this Indenture with respect to Securities of
any series, all moneys then held by any paying agent under the provisions of
this Indenture with respect to such series of Securities shall, upon demand of
the Issuer, be repaid to it or paid to the Trustee and thereupon such paying
agent shall be released from all further liability with respect to such moneys.

      SECTION 10.4 Return of Moneys Held by Trustee and Paying Agent Unclaimed
for Two Years. Any moneys deposited with or paid to the Trustee or any paying
agent for the payment of the principal of, premium, if any, or interest, if any,
on any Security of any series and not applied but remaining unclaimed for two
years after the date upon which such principal, premium, if any, or interest, if
any, shall have become due and payable, shall, upon the written request of the
Issuer and unless otherwise required by mandatory provisions of applicable
escheat or abandoned or unclaimed property law, be repaid to the Issuer by the
Trustee for such series or such paying agent, and the Holder of the Securities
of such series shall, unless otherwise required by mandatory provisions of
applicable escheat or abandoned or unclaimed property laws, thereafter look only
to the Issuer for any payment which such Holder may be entitled to collect, and
all liability of the Trustee or any paying agent with respect to such moneys
shall thereupon cease.

      SECTION 10.5 Indemnity for U.S. Government Obligations. The Issuer 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
10.1 or the principal or interest received in respect of such obligations.

                                      -52-
<PAGE>   60

                                 ARTICLE ELEVEN
                            MISCELLANEOUS PROVISIONS

      SECTION 11.1 Partners, Incorporators, Stockholders, Officers and Directors
of Issuer Exempt from Individual Liability. No recourse under or upon any
obligation, covenant or agreement contained in this Indenture, or in any
Security, or because of any indebtedness evidenced thereby, shall be had against
any incorporator, as such or against any past, present or future stockholder,
officer or director, as such, of the Issuer, or any partner of the Issuer or of
any successor, either directly or through the Issuer or any successor, under any
rule of law, statute or constitutional provision or by the enforcement of any
assessment or by any legal or equitable proceeding or otherwise, all such
liability being expressly waived and released by the acceptance of the
Securities by the Holders thereof and as part of the consideration for the issue
of the Securities.

      SECTION 11.2 Provisions of Indenture for the Sole Benefit of Parties and
Holders of Securities. Nothing in this Indenture or in the Securities, expressed
or implied, shall give or be construed to give to any Person, other than the
parties hereto and their successors and the Holders of the Securities, any legal
or equitable right, remedy or claim under this Indenture or under any covenant
or provision herein contained, all such covenants and provisions being for the
sole benefit of the parties hereto and their successors and of the Holders of
the Securities.

     SECTION 11.3 Successors and Assigns of Issuer Bound by Indenture. All the
covenants, stipulations, promises and agreements in this Indenture contained by
or on behalf of the Issuer shall bind its successors and assigns, whether so
expressed or not.

      SECTION 11.4 Notices and Demands on Issuer, Trustee and Holders of
Securities. Any notice or demand which by any provision of this Indenture is
required or permitted to be given or served by the Trustee or by the Holders of
Securities to or on the Issuer, or as required pursuant to the Trust Indenture
Act of 1939, may be given or served by being deposited postage prepaid,
first-class mail (except as otherwise specifically provided herein) addressed
(until another address of the Issuer is filed by the Issuer with the Trustee) to
York International Corporation, 631 South Richland Avenue, York, Pennsylvania
17403, Attention: Vice President, Secretary and General Counsel. Any notice,
direction, request or demand by the Issuer or any Holder of Securities to or
upon the Trustee shall be deemed to have been sufficiently given or served by
being deposited postage prepaid, first-class mail (except as otherwise
specifically provided herein) addressed (until another address of the Trustee is
filed by the Trustee with the Issuer) to The Bank of New York, 101 Barclay
Street, Floor 21 West, New York, New York 10286, Attention: Corporate Trust
Department.

      Where this Indenture provides for notice to Holders of Securities, such
notice shall be sufficiently given (unless otherwise herein expressly provided)
if in writing and mailed, first-class postage prepaid, to each Holder entitled
thereto, at his last address as it appears in the Security register. 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

                                      -53-
<PAGE>   61

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 or irregularities in regular mail
service, it shall be impracticable to mail notice to the Issuer when such notice
is required to be given pursuant to any provision of this Indenture, then any
manner of giving such notice as shall be reasonably satisfactory to the Trustee
shall be deemed to be sufficient notice.

      SECTION 11.5 Officers' Certificates and Opinions of Counsel; Statements to
Be Contained Therein. Upon any application or demand by the Issuer to the
Trustee to take any action under any of the provisions of this Indenture, or as
required pursuant to the Trust Indenture Act of 1939, the Issuer shall furnish
to the Trustee an Officers' Certificate stating that all conditions precedent
provided for in this Indenture relating to the proposed action have been
complied with and an Opinion of Counsel stating that in the opinion of such
counsel all such conditions precedent have been complied with, except that in
the case of any such application or demand as to which the furnishing of such
documents is specifically required by any provision of this Indenture relating
to such particular application or demand, no additional certificate or opinion
need be furnished.

      Each certificate or opinion provided for in this Indenture (other than a
certificate provided pursuant to Section 3.3) and delivered to the Trustee with
respect to compliance with a condition or covenant provided for in this
Indenture shall include (a) a statement that the person making such certificate
or opinion has read such covenant or condition, (b) 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, (c) a statement
that, in the opinion of such person, he has made such examination or
investigation as is necessary to enable him to express an opinion as to whether
or not such covenant or condition has been complied with, and (d) a statement as
to whether or not, in the opinion of such person, such condition or covenant has
been complied with.

      Any certificate, statement or opinion of an officer of the Issuer may be
based, insofar as it relates to legal matters, upon a certificate or opinion of
or representations by counsel, unless such officer knows that the certificate or
opinion or representations with respect to the matters upon which his
certificate, statement or opinion may be based as aforesaid are erroneous, or in
the exercise of reasonable care should know that the same are erroneous. Any
certificate, statement or opinion of counsel may be based, insofar as it relates
to factual matters, on information with respect to which is in the possession of
the Issuer, upon the certificate, statement or opinion of or representations by
an officer or officers of the Issuer, unless such counsel knows that the
certificate, statement or opinion or representations with respect to the matters
upon which his certificate, statement or opinion may be based as aforesaid are
erroneous, or in the exercise of reasonable care should know that the same are
erroneous.

      Any certificate, statement or opinion of an officer of the Issuer or of
counsel may be based, insofar as it relates to accounting matters, upon a
certificate or opinion of or representations by an accountant or firm of
accountants in the employ of the Issuer, unless such

                                      -54-
<PAGE>   62

officer or counsel, as the case may be, knows that the certificate or opinion or
representations with respect to the accounting matters upon which his
certificate, statement or opinion may be based as aforesaid are erroneous, or in
the exercise of reasonable care should know that the same are erroneous.

      Any certificate or opinion of any independent firm of public accountants
filed with and directed to the Trustee shall contain a statement that such firm
is independent.

      SECTION 11.6 Payments Due on Saturdays, Sundays and Holidays. If the date
of maturity of principal of or interest, if any, on the Securities of any series
or the date fixed for redemption, purchase or repayment of any such Security
shall not be a Business Day, then payment of interest, if any, premium, if any,
or principal need not be made on such date, but may be made on the next
succeeding Business Day with the same force and effect as if made on the date of
maturity or the date fixed for redemption, purchase or repayment, and, in the
case of payment, no interest shall accrue for the period after such date.

      SECTION 11.7 Conflict of Any Provision of Indenture with Trust Indenture
Act of 1939. If and to the extent that any provision of this Indenture limits,
qualifies or conflicts with another provision included in this Indenture which
is required to be included herein by any of Sections 310 to 317, inclusive, or
is deemed applicable to this Indenture by virtue of the provisions of the Trust
Indenture Act of 1939, such required provision shall control.

      SECTION 11.8 GOVERNING LAW. THIS INDENTURE AND EACH SECURITY SHALL BE
DEEMED TO BE A CONTRACT UNDER THE LAWS OF THE STATE OF NEW YORK AND FOR ALL
PURPOSES SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF SUCH
STATE.

      SECTION 11.9 Counterparts. This Indenture may be executed in any number
of counterparts, each of which shall be an original; but such counterparts shall
together constitute but one and the same instrument.

      SECTION 11.10 Effect of Headings. The Article and Section headings herein
and the Table of Contents are for convenience only and shall not affect the
construction hereof.

                                 ARTICLE TWELVE
                   REDEMPTION OF SECURITIES AND SINKING FUNDS

      SECTION 12.1 Applicability of Article. The provisions of this Article
shall be applicable to the Securities of any series which are redeemable before
their maturity or are subject to any sinking fund for the retirement of
Securities of a series except as otherwise specified, as contemplated by Section
2.3 for Securities of such series.

      SECTION 12.2  Notice of Redemption; Partial Redemptions. Notice of
redemption to the Holders of Securities of any series to be redeemed as a whole
or in part at the option of the Issuer or as required by any mandatory sinking
fund provision herein shall be given by mailing notice of such redemption by
first class mail, postage prepaid, at least 30 days and not more than

                                      -55-
<PAGE>   63

60 days prior to the date fixed for redemption to such Holders of Securities of
such series at their last addresses as they shall appear in the Security
register. Any notice which is mailed in the manner herein provided shall be
conclusively presumed to have been duly given, whether or not the Holder
receives the notice. Failure to give notice by mail, or any defect in the notice
to the Holder of any Security of a series designated for redemption as a whole
or in part shall not affect the validity of the proceedings for the redemption
of any other Security of such series.

      The notice of redemption to each such Holder shall specify (i) the
principal amount of each Security of such series held by such Holder to be
redeemed, (ii) the date fixed for redemption, (iii) the redemption price, (iv)
the place or places of payment, (v) the CUSIP number relating to such
Securities, (vi) that payment will be made upon presentation and surrender of
such Securities, unless otherwise specified by the terms of such Securities,
(vii) whether such redemption is pursuant to the mandatory or optional sinking
fund, or both, if such be the case, and that the redemption is subject to
receipt by the Trustee of sufficient funds, (viii) whether interest, if any,
(or, in the case of Original Issue Discount Securities, original issue discount)
accrued to the date fixed for redemption will be paid as specified in such
notice and (ix) whether on and after said date interest, if any, (or, in the
case of Original Issue Discount Securities, original issue discount) thereon or
on the portions thereof to be redeemed will cease to accrue. In case any
Security of a series is to be redeemed in part only, the notice of redemption
shall state the portion of the principal amount thereof to be redeemed and shall
state that on and after the date fixed for redemption, upon surrender of such
Security, a new Security or Securities of such series in principal amount equal
to the unredeemed portion thereof will be issued.

      The notice of redemption of Securities of any series to be redeemed at the
option of the Issuer or as required by any mandatory sinking fund provision
shall be given by the Issuer or, at the Issuer's request, by the Trustee in the
name and at the expense of the Issuer.

      On or before the redemption date specified in the notice of redemption
given as provided in this Section 12.2, the Issuer will deposit with the Trustee
or with one or more paying agents an amount of money sufficient to redeem on the
redemption date all the Securities of such series so called for redemption at
the appropriate redemption price, together with accrued interest, if any, to the
date fixed for redemption. The Issuer will deliver to the Trustee at least 60
days prior to the date fixed for redemption (unless a shorter notice period
shall be satisfactory to the Trustee) an Officers' Certificate stating the
aggregate principal amount of Securities to be redeemed. In case of a redemption
at the election of the Issuer prior to the expiration of any restriction on such
redemption, the Issuer shall deliver to the Trustee, prior to the giving of any
notice of redemption to Holders pursuant to this Section, an Officers'
Certificate stating that such restriction has been complied with.

      If less than all the Securities of a series are to be redeemed, the
Trustee shall select, in such manner as it shall deem appropriate and fair,
Securities of such series to be redeemed, Securities may be redeemed in part in
multiples equal to the minimum authorized denomination for Securities of such
series or any multiple thereof. The Trustee shall promptly notify the Issuer in
writing of the Securities of such series selected for redemption and, in the
case of any Securities of such series selected for partial redemption, the
principal amount thereof to be

                                      -56-
<PAGE>   64

redeemed. So long as Securities of a series are represented by a Global Security
registered in the name of a nominee of the Depositary, the particular Securities
or portions thereof to be redeemed shall be selected by the Depositary in such
manner as it shall determine. For all purposes of this Indenture, unless the
context otherwise requires, all provisions relating to the redemption of
Securities of any series shall relate, in the case of any Security redeemed or
to be redeemed only in part, to the portion of the principal amount of such
Security which has been or is to be redeemed.

      SECTION 12.3 Payment of Securities Called for Redemption. If notice of
redemption has been given as provided by this Article Twelve, the Securities or
portions of Securities specified in such notice shall become due and payable on
the date and at the place or places stated in such notice at the applicable
redemption price, together with interest, if any accrued to the date fixed for
redemption, and on and after said date (unless the Issuer shall default in the
payment of such Securities at the redemption price, together with interest, if
any, accrued to said date) interest, if any (or, in the case of Original Issue
Discount Securities, original issue discount), on the Securities or portions of
Securities so called for redemption shall cease to accrue, and such Securities
shall cease from and after the date fixed for redemption (unless an earlier date
shall be specified in a Board Resolution, Officers' Certificate or executed
supplemental indenture referred to in Sections 2.1 and 2.3 by or pursuant to
which the form and terms of the Securities of such series were established)
except as provided in Sections 6.5 and 10.4, to be entitled to any benefit or
security under this Indenture, and the Holders thereof shall have no right in
respect of such Securities except the right to receive the redemption price
thereof and unpaid interest, if any, to the date fixed for redemption. On
presentation and surrender of such Securities at a place of payment specified in
said notice, said Securities or the specified portions thereof shall be paid and
redeemed by the Issuer at the applicable redemption price, together with
interest, if any, accrued thereon to the date fixed for redemption; provided
that payment of interest, if any, becoming due on or prior to the date fixed for
redemption shall be payable to the Holders of Securities registered as such on
the relevant record date subject to the terms and provisions of Sections 2.3 and
2.7 hereof.

      If any Security called for redemption shall not be so paid upon surrender
thereof for redemption, the redemption price shall, until paid or duly provided
for, bear interest from the date fixed for redemption at the rate of interest or
Yield to Maturity (in the case of an Original Issue Discount Security) borne by
such Security.

      Upon presentation of any Security redeemed in part only, the Issuer shall
execute and the Trustee shall authenticate and deliver to or on the order of the
Holder thereof, at the expense of the Issuer, a new Security or Securities of
such series, and of like tenor, of authorized denominations, in principal amount
equal to the unredeemed portion of the Security so presented.

      SECTION 12.4 Exclusion of Certain Securities from Eligibility for
Selection for Redemption. Securities shall be excluded from eligibility for
selection for redemption if they are identified by registration and certificate
number in an Officers' Certificate delivered to the Trustee at least 45 days
prior to the last date on which notice of redemption may be given as being owned
of record and beneficially by, and not pledged or hypothecated by either (a) the

                                      -57-
<PAGE>   65

Issuer, or (b) a Person specifically identified in such written statement as an
Affiliate of the Issuer.

      SECTION 12.5 Mandatory and Optional Sinking Funds. The minimum amount of
any sinking fund payment provided for by the terms of the Securities of any
series is herein referred to as a "mandatory sinking fund payment," and any
payment in excess of such minimum amount provided for by the terms of the
Securities of any series is herein referred to as an "optional sinking fund
payment." The date on which a sinking fund payment is to be made is herein
referred to as the "sinking fund payment date."

      In lieu of making all or any part of any mandatory sinking fund payment
with respect to any series of Securities in cash, the Issuer may at its option
(a) deliver to the Trustee Securities of such series theretofore purchased or
otherwise acquired (except upon redemption pursuant to the mandatory sinking
fund) by the Issuer or receive credit for Securities of such series (not
previously so credited) theretofore purchased or otherwise acquired (except as
aforesaid) by the Issuer and delivered to the Trustee for cancellation pursuant
to Section 2.10, (b) receive credit for optional sinking fund payments (not
previously so credited) made pursuant to this Section 12.5, or (c) receive
credit for Securities of such series (not previously so credited) redeemed by
the Issuer through any optional redemption provision contained in the terms of
such series. Securities so delivered or credited shall be received or credited
by the Trustee at the sinking fund redemption price specified in such
Securities.

      On or before the 60th day next preceding each sinking fund payment date
for any series, the Issuer will deliver to the Trustee an Officers' Certificate
(a) specifying the portion of the mandatory sinking fund payment to be satisfied
by payment of cash and the portion to be satisfied by credit of Securities of
such series and the basis for such credit, (b) stating that none of the
Securities of such series to be so credited has theretofore been so credited,
(c) stating that no Defaults in the payment of interest or Events of Default
with respect to such series have occurred and are continuing, and (d) stating
whether or not the Issuer intends to exercise its right to make an optional
sinking fund payment with respect to such series and, if so, specifying the
amount of such optional sinking fund payment which the Issuer intends to pay on
or before the next succeeding sinking fund payment date. Any Securities of such
series to be credited and required to be delivered to the Trustee in order for
the Issuer to be entitled to credit therefor as aforesaid which have not
theretofore been delivered to the Trustee shall be delivered for cancellation
pursuant to Section 2.10 to the Trustee with such Officers' Certificate (or
reasonably promptly thereafter if acceptable to the Trustee). Such Officers'
Certificate shall be irrevocable and upon its receipt by the Trustee the Issuer
shall become unconditionally obligated to make all the cash payments or payments
therein referred to, if any, on or before the next succeeding sinking fund
payment date. Failure of the Issuer, on or before any such 60th day, to deliver
such Officers' Certificate and Securities (subject to the parenthetical clause
in the second preceding sentence) specified in this paragraph, if any, shall not
constitute a Default but shall constitute, on and as of such date, the
irrevocable election of the Issuer (i) that the mandatory sinking fund payment
for such series due on the next succeeding sinking fund payment date shall be
paid entirely in cash without the option to deliver or credit Securities of such
series in respect thereof,

                                      -58-
<PAGE>   66

and (ii) that the Issuer will make no optional sinking fund payment with respect
to such series as provided in this Section 12.5.

      If the sinking fund payment or payments (mandatory or optional or both) to
be made in cash on the next succeeding sinking fund payment date plus any unused
balance of any preceding sinking fund payments made in cash shall exceed
$50,000, or a lesser sum if the Issuer shall so request with respect to the
Securities of any particular series, such cash shall be applied on the next
succeeding sinking fund payment date to the redemption of Securities of such
series at the sinking fund redemption price together with accrued interest, if
any, to the date fixed for redemption. If such amount shall be $50,000 or less
and the Issuer makes no such request, then it shall be carried over until a sum
in excess of $50,000 is available. The Trustee shall select, in the manner
provided in Section 12.2, for redemption on such sinking fund payment date a
sufficient principal amount of Securities of such series to absorb said cash, as
nearly as may be, and shall (if requested in writing by the Issuer) inform the
Issuer of the serial numbers of the Securities of such series (or portions
thereof) so selected. The Issuer, or the Trustee, in the name and at the expense
of the Issuer (if the Issuer shall so request the Trustee in writing) shall
cause notice of redemption of the Securities of such series to be given in
substantially the manner provided in Section 12.2 (and with the effect provided
in Section 12.3) for the redemption of Securities of such series in part at the
option of the Issuer. The amount of any sinking fund payments not so applied or
allocated to the redemption of Securities of such series shall be added to the
next cash sinking fund payment for such series and, together with such payment,
shall be applied in accordance with the provisions of this Section 12.5. Any and
all sinking fund moneys held on the stated maturity date of the Securities of
any particular series (or earlier, if such maturity is accelerated), which are
not held for the payment or redemption of particular Securities of such series
shall be applied, together with other moneys, if necessary, sufficient for the
purpose, to the payment of the principal of, and interest, if any, on, the
Securities of such series at maturity.

      On or before each sinking fund payment date, the Issuer shall pay to the
Trustee in cash or shall otherwise provide for the payment of all interest, if
any, accrued to the date fixed for redemption on Securities to be redeemed on
such sinking fund payment date.

      The Trustee shall not redeem or cause to be redeemed any Securities of a
series with sinking fund moneys or give any notice of redemption of Securities
for such series by operation of the sinking fund during the continuance of a
Default in payment of interest on such Securities or of any Event of Default
with respect to such series except that, where the giving of notice of
redemption of any Securities shall theretofore have been made, the Trustee shall
redeem or cause to be redeemed such Securities, provided that it shall have
received from the Issuer a sum sufficient for such redemption. Except as
aforesaid, any moneys in the sinking fund for such series at the time when any
such Default or Event of Default known to a Responsible Officer of the Trustee
shall occur, and any moneys thereafter paid into the sinking fund, shall, during
the continuance of such Default or Event of Default, be deemed to have been
collected under Article Five and held for the payment of all such Securities. In
case such Event of Default shall have been waived as provided in Article Five or
the Default cured on or before the 60th day preceding the sinking fund payment
date in any year, such moneys shall thereafter be applied on the next

                                      -59-
<PAGE>   67

succeeding sinking fund payment date in accordance with this Section to the
redemption of such Securities.

      IN WITNESS WHEREOF, the parties hereto have caused this Indenture to be
duly executed as of ______________ ___, 200_.

                                    YORK INTERNATIONAL CORPORATION

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

Attest:

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

                                    THE BANK OF NEW YORK, as
                                     Trustee

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

                                      -60-<PAGE>   1
                                                                     EXHIBIT 4.3

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

                         YORK INTERNATIONAL CORPORATION

                                       AND

                              THE BANK OF NEW YORK,

                                   AS TRUSTEE

                          SENIOR SUBORDINATED INDENTURE

                       DATED AS OF _________________, 200_

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

<PAGE>   2

                             CROSS REFERENCE SHEETA

        Provisions of Trust Indenture Act of 1939 and Indenture to be dated as
of ________________, 200_ between YORK INTERNATIONAL CORPORATION and THE BANK OF
NEW YORK, as Trustee:

<TABLE>
<CAPTION>
Section of the Act                                    Section of Indenture
------------------                                    --------------------

<S>                                                <C>
310(a)(1), (2) and (5)...........................     6.9
310(a)(3) and (4)................................     Inapplicable
310(b)...........................................     6.8 and 6.10(a), (b) and (d)
310(c)...........................................     Inapplicable
311(a)...........................................     6.13
311(b)...........................................     6.13
311(c)...........................................     Inapplicable
312(a)...........................................     4.1 and 4.2(a)
312(b)...........................................     4.2(a) and (b)(i) and (ii)
312(c)...........................................     4.2(c)
313(a)...........................................     4.4(a)(i), (ii), (iii), (iv), (v), (vi) and (vii)
313(a)(5)........................................     Inapplicable
313(b)(1)........................................     Inapplicable
313(b)(2)........................................     4.4(b)
313(c)...........................................     4.4(c)
313(d)...........................................     4.4(d)
314(a)...........................................     4.3
314(b)...........................................     Inapplicable
314(c)(1) and (2)................................     11.5
314(c)(3)........................................     Inapplicable
314(d)...........................................     Inapplicable
314(e)...........................................     11.5
314(f)...........................................     Inapplicable
315(a), (c) and (d)..............................     6.1
315(b)...........................................     5.8
315(e)...........................................     5.9
316(a)(1)........................................     5.7
316(a)(2)........................................     Not required
316(a) (last sentence)...........................     7.4
316(b)...........................................     5.4
317(a)...........................................     5.2
317(b)...........................................     3.5(a)
318(a)...........................................     11.7
</TABLE>

----------------------------
A This Cross Reference Sheet is not part of the Indenture.

<PAGE>   3

                                TABLE OF CONTENTS
<TABLE>
<CAPTION>
                                                                                                         Page
                                                                                                         ----
                                                  ARTICLE ONE
                                                  DEFINITIONS

<S>                                                                                                       <C>
SECTION 1.1      Definitions.................................................................................1
   Affiliate.................................................................................................2
   Authenticating Agent......................................................................................2
   Bankruptcy Law............................................................................................2
   Board of Directors........................................................................................2
   Board Resolution..........................................................................................2
   Business Day..............................................................................................2
   Commission................................................................................................2
   Corporate Trust Office....................................................................................2
   Debt......................................................................................................2
   Default...................................................................................................2
   Depositary................................................................................................2
   Dollars...................................................................................................3
   $.........................................................................................................3
   Exchange Act..............................................................................................3
   Event of Default..........................................................................................3
   GAAP......................................................................................................3
   Global Security...........................................................................................3
   Holder....................................................................................................3
   Holder of Securities......................................................................................3
   Securityholder............................................................................................3
   Indenture.................................................................................................3
   interest..................................................................................................3
   Issuer....................................................................................................3
   Issuer Order..............................................................................................3
   Lien......................................................................................................4
   Officers' Certificate.....................................................................................4
   Opinion of Counsel........................................................................................4
   original issue date.......................................................................................4
   original issue discount...................................................................................4
   Original Issue Discount Security..........................................................................4
   Outstanding...............................................................................................4
   Payment Blockage Period...................................................................................5
   Payment Notice............................................................................................5
   Periodic Offering.........................................................................................5
   Person....................................................................................................5
   Place of Payment..........................................................................................5
   principal.................................................................................................5
   principal amount..........................................................................................5
   record date...............................................................................................5
</TABLE>

                                       -i-

<PAGE>   4

<TABLE>
<S>                                                                                                       <C>
   Responsible Officer.......................................................................................5
   Restricted Subsidiary.....................................................................................6
   Securities Act............................................................................................6
   Security..................................................................................................6
   Securities................................................................................................6
   Senior Indebtedness.......................................................................................6
   Senior Subordinated Indebtedness..........................................................................6
   Senior Nonmonetary Default................................................................................6
   Stated Maturity...........................................................................................6
   Subsidiary................................................................................................6
   Trust Indenture Act of 1939...............................................................................6
   Trustee...................................................................................................6
   U.S. Government Obligations...............................................................................7
   vice president............................................................................................7
   Yield to Maturity.........................................................................................7
</TABLE>

<TABLE>
<CAPTION>
                                                  ARTICLE TWO
                                                   SECURITIES

<S>             <C>                                                                                       <C>
SECTION 2.1      Forms Generally.............................................................................7
SECTION 2.2      Form of Trustee's Certificate of Authentication.............................................7
SECTION 2.3      Amount Unlimited, Issuable in Series........................................................8
SECTION 2.4      Authentication and Delivery of Securities..................................................10
SECTION 2.5      Execution of Securities....................................................................13
SECTION 2.6      Certificate of Authentication..............................................................13
SECTION 2.7      Denomination and Date of Securities; Payments of Interest..................................14
SECTION 2.8      Registration, Transfer and Exchange........................................................14
SECTION 2.9      Mutilated, Defaced, Destroyed, Lost and Stolen Securities..................................16
SECTION 2.10     Cancellation of Securities; Disposition Thereof............................................17
SECTION 2.11     Temporary Securities.......................................................................18
SECTION 2.12     CUSIP Numbers..............................................................................18

                                                 ARTICLE THREE
                                            COVENANTS OF THE ISSUER

SECTION 3.1      Payment of Principal and Interest..........................................................18
SECTION 3.2      Maintenance of Office or Agency for Notices and Demands....................................18
SECTION 3.3      Officers' Annual Compliance Certificate Filed with the Trustee.............................19
SECTION 3.4      Corporate Existence........................................................................19
SECTION 3.5      Payment of Taxes and Other Claims..........................................................19

                                                  ARTICLE FOUR
                                      SECURITYHOLDERS LISTS AND REPORTS BY
                                           THE ISSUER AND THE TRUSTEE

SECTION 4.1      Issuer to Furnish Trustee Information as to Names and Addresses of Securityholders.........19
</TABLE>

                                      -ii-
<PAGE>   5

<TABLE>
<S>                                                                                                       <C>
SECTION 4.2      Preservation and Disclosure of Securityholders Lists.......................................20
SECTION 4.3      Reports by the Issuer......................................................................21
SECTION 4.4      Reports by the Trustee.....................................................................21

                                                  ARTICLE FIVE
                                  REMEDIES OF THE TRUSTEE AND SECURITYHOLDERS
                                              ON EVENT OF DEFAULT

SECTION 5.1      Events of Default..........................................................................23
SECTION 5.2      Payment of Securities on Default; Suit Therefor............................................25
SECTION 5.3      Application of Moneys Collected by Trustee.................................................26
SECTION 5.4      Proceedings by Securityholders.............................................................27
SECTION 5.5      Proceedings by Trustee.....................................................................28
SECTION 5.6      Remedies Cumulative and Continuing.........................................................28
SECTION 5.7      Direction of Proceedings; Waiver of Defaults by Majority of Securityholders................28
SECTION 5.8      Notice of Defaults.........................................................................29
SECTION 5.9      Undertaking to Pay Costs...................................................................29

                                                  ARTICLE SIX
                                             CONCERNING THE TRUSTEE

SECTION 6.1      Duties and Responsibilities of the Trustee; During Default; Prior to Default...............29
SECTION 6.2      Certain Rights of the Trustee..............................................................30
SECTION 6.3      Trustee Not Responsible for Recitals, Disposition of Securities or Application of Proceeds
                 Thereof....................................................................................32
SECTION 6.4      Trustee and Agents May Hold Securities; Collections, etc...................................32
SECTION 6.5      Moneys Held by Trustee.....................................................................32
SECTION 6.6      Compensation and Indemnification of Trustee and Its Prior Claim............................32
SECTION 6.7      Right of Trustee to Rely on Officers' Certificate, etc.....................................33
SECTION 6.8      Qualification of Trustee; Conflicting Interests............................................33
SECTION 6.9      Persons Eligible for Appointment as Trustee; Different Trustees for Different Series.......33
SECTION 6.10     Resignation and Removal; Appointment of Successor Trustee..................................34
SECTION 6.11     Acceptance of Appointment by Successor Trustee.............................................35
SECTION 6.12     Merger, Conversion, Consolidation or Succession to Business of Trustee.....................36
SECTION 6.13     Preferential Collection of Claims Against the Issuer.......................................36
SECTION 6.14     Appointment of Authenticating Agent........................................................36

                                                 ARTICLE SEVEN
                                         CONCERNING THE SECURITYHOLDERS

SECTION 7.1      Evidence of Action Taken by Securityholders................................................37
SECTION 7.2      Proof of Execution of Instruments and of Holding of Securities.............................38
</TABLE>

                                     -iii-

<PAGE>   6

<TABLE>
<S>           <C>                                                                                         <C>
SECTION 7.3      Holders to be Treated as Owners............................................................38
SECTION 7.4      Securities Owned by Issuer Deemed Not Outstanding..........................................38
SECTION 7.5      Right of Revocation of Action Taken........................................................39
SECTION 7.6      Record Date for Consents and Waivers.......................................................39

                                                 ARTICLE EIGHT
                                            SUPPLEMENTAL INDENTURES

SECTION 8.1      Supplemental Indentures Without Consent of Securityholders.................................39
SECTION 8.2      Supplemental Indentures with Consent of Securityholders....................................41
SECTION 8.3      Effect of Supplemental Indenture...........................................................42
SECTION 8.4      Documents to Be Given to Trustee...........................................................43
SECTION 8.5      Notation on Securities in Respect of Supplemental Indentures...............................43

                                                  ARTICLE NINE
                                                   SUCCESSORS

SECTION 9.1      When Issuer May Merge, etc.................................................................43
SECTION 9.2      Successor Corporation Substituted..........................................................43

                                                  ARTICLE TEN
                                    SATISFACTION AND DISCHARGE OF INDENTURE;
                                     COVENANT DEFEASANCE; UNCLAIMED MONEYS

SECTION 10.1     Satisfaction and Discharge of Indenture; Covenant Defeasance...............................44
SECTION 10.2     Application by Trustee of Funds Deposited for Payment of Securities........................46
SECTION 10.3     Repayment of Moneys Held by Paying Agent...................................................46
SECTION 10.4     Return of Moneys Held by Trustee and Paying Agent Unclaimed for Two Years..................47
SECTION 10.5     Indemnity for U.S. Government Obligations..................................................47

                                                 ARTICLE ELEVEN
                                            MISCELLANEOUS PROVISIONS

SECTION 11.1     Partners, Incorporators, Stockholders, Officers and Directors of Issuer Exempt from
                 Individual Liability.......................................................................47
SECTION 11.2     Provisions of Indenture for the Sole Benefit of Parties and Holders of Securities..........47
SECTION 11.3     Successors and Assigns of Issuer Bound by Indenture........................................47
SECTION 11.4     Notices and Demands on Issuer, Trustee and Holders of Securities...........................47
SECTION 11.5     Officers' Certificates and Opinions of Counsel; Statements to Be Contained Therein.........48
SECTION 11.6     Payments Due on Saturdays, Sundays and Holidays............................................49
SECTION 11.7     Conflict of Any Provision of Indenture with Trust Indenture Act of 1939....................49
SECTION 11.8     GOVERNING LAW..............................................................................49
</TABLE>

                                      -iv-
<PAGE>   7

<TABLE>
<S>            <C>                                                                                        <C>
SECTION 11.9     Counterparts...............................................................................49
SECTION 11.10    Effect of Headings.........................................................................50

                                                 ARTICLE TWELVE
                                   REDEMPTION OF SECURITIES AND SINKING FUNDS

SECTION 12.1     Applicability of Article...................................................................50
SECTION 12.2     Notice of Redemption; Partial Redemptions..................................................50
SECTION 12.3     Payment of Securities Called for Redemption................................................51
SECTION 12.4     Exclusion of Certain Securities from Eligibility for Selection for Redemption..............52
SECTION 12.5     Mandatory and Optional Sinking Funds.......................................................52

                                                ARTICLE THIRTEEN
                                                 SUBORDINATION

SECTION 13.1     Securities Subordinated to Senior Indebtedness.............................................54
SECTION 13.2     Reliance on Certificate of Liquidating Agent; Further Evidence as to Ownership of Senior
                 Indebtedness...............................................................................57
SECTION 13.3     Payment Permitted If No Default............................................................57
SECTION 13.4     Disputes with Holders of Certain Senior Indebtedness.......................................57
SECTION 13.5     Trustee Not Charged with Knowledge of Prohibition..........................................58
SECTION 13.6     Trustee to Effectuate Subordination........................................................58
SECTION 13.7     Rights of Trustee as Holder of Senior Indebtedness.........................................58
SECTION 13.8     Article Applicable to Paying Agents........................................................58
SECTION 13.9     Subordination Rights Not Impaired by Acts or Omissions of the Issuer or Holders of Senior
                 Indebtedness...............................................................................59
SECTION 13.10    Trustee Not Fiduciary for Holders of Senior Indebtedness...................................59
</TABLE>

                                      -v-

<PAGE>   8

         THIS SENIOR SUBORDINATED INDENTURE, dated as of ______________, 200_
between YORK INTERNATIONAL CORPORATION, a Delaware corporation (the "Issuer"),
and THE BANK OF NEW YORK, as trustee (the "Trustee").

                              W I T N E S S E T H:

         WHEREAS, the Issuer has duly authorized the issuance from time to time
of its unsecured senior subordinated debentures, notes or other evidences of
indebtedness to be issued in one or more series (the "Securities") up to such
principal amount or amounts as may from time to time be authorized in accordance
with the terms of this Indenture;

         WHEREAS, the Issuer has duly authorized the execution and delivery of
this Indenture to provide, among other things, for the authentication, delivery
and administration of the Securities; and

         WHEREAS, all things necessary to make this Indenture a valid indenture
and agreement according to its terms have been undertaken and completed;

         NOW, THEREFORE:

         In consideration of the premises and the purchases of the Securities by
the Holders (as hereinafter defined) thereof, the Issuer and the Trustee
mutually covenant and agree for the equal and proportionate benefit of the
respective Holders from time to time of the Securities as follows:

                                   ARTICLE ONE
                                   DEFINITIONS

         SECTION 1.1    Definitions. For all purposes of this Indenture and of
any indenture supplemental hereto the following terms shall have the respective
meanings specified in this Section 1.1 (except as otherwise expressly provided
herein or in any indenture supplemental hereto or unless the context otherwise
clearly requires). All other terms used in this Indenture that are defined in
the Trust Indenture Act of 1939 (as hereinafter defined), including terms
defined therein by reference to the Securities Act (as hereinafter defined),
shall have the meanings assigned to such terms in said Trust Indenture Act of
1939 and in said Securities Act as in force at the date of this Indenture
(except as otherwise expressly provided herein or in any indenture supplemental
hereto or unless the context otherwise clearly requires).

         All accounting terms used herein and not expressly defined shall have
the meanings assigned to such terms in accordance with GAAP (as hereinafter
defined).

         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. The expressions "date of this Indenture", "date
hereof", "date as of which this Indenture is dated" and "date of execution and
delivery of this Indenture" and other expressions of similar import refer to the
effective date of the original execution and delivery of this Indenture, viz.,
as of ___________ ___, 200_.
<PAGE>   9

         The terms defined in this Article have the meanings assigned to them in
this Article and include the plural as well as the singular.

         "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" shall have the meaning set forth in Section
6.14.

         "Bankruptcy Law" means Title 11, United States Code or any similar
Federal or state law for the relief of debtors.

         "Board of Directors" means the board of directors of the Issuer.

         "Board Resolution" means one or more resolutions, certified by the
secretary or an assistant secretary of the Issuer to have been duly adopted or
consented to by the Board of Directors and to be in full force and effect, and
delivered to the Trustee.

         "Business Day" means, with respect to any Security, unless otherwise
specified in a Board Resolution and an Officers' Certificate with respect to a
particular series of Securities, a day that (a) in the Place of Payment (or in
any of the Places of Payment, if more than one) in which amounts are payable, as
specified in the form of such Security, and (b) in the city in which the
Corporate Trust Office is located, is not a day on which banking institutions
are authorized or required by law or regulation 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 and delivery of this Indenture such Commission is not existing and
performing the duties now assigned to it under the Trust Indenture Act of 1939,
then the body performing such duties on such date.

         "Corporate Trust Office" means the office of the Trustee at which the
corporate trust business of the Trustee shall, at any particular time, be
principally administered, which office is, at the date as of which this
Indenture is dated, located in New York, New York.

         "Debt" means indebtedness for borrowed money.

         "Default" means any event which is, or after the giving of notice or
passage of time or both would be, an Event of Default.

         "Depositary" means, with respect to the Securities of any series
issuable or issued in the form of one or more Global Securities, the Person
designated as Depositary by the Issuer pursuant to Section 2.3 until a successor
Depositary shall have become such pursuant to the applicable provisions of this
Indenture, and thereafter "Depositary" shall mean or include each Person who is
then a Depositary hereunder, and, if at any time there is more than one such

                                      -2-
<PAGE>   10

Person, "Depositary" as used with respect to the Securities of any such series
shall mean the Depositary with respect to the Global Securities of such series.

         "Dollars" and the sign "$" means the coin and currency of the United
States of America as at the time of payment is legal tender for the payment of
public and private debts.

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

         "Event of Default" means any event or condition specified as such in
Section 5.1.

         "GAAP" means generally accepted accounting principles set forth in the
opinions and pronouncements of the Accounting Principles Board of the American
Institute of Certified Public Accountants and statements and pronouncements of
the Financial Accounting Standards Board or in such other statements by such
other entity as may be approved by a significant segment of the accounting
profession, consistently applied, which are applicable to the circumstances as
of the date of determination.

         "Global Security" means a Security evidencing all or a part of a series
of Securities issued to the Depositary for such series in accordance with
Section 2.3 and bearing the legend prescribed in Section 2.4.

         "Holder", "Holder of Securities", "Securityholder" or other similar
terms mean, in the case of any Security, the Person in whose name such Security
is registered in the security register kept by the Issuer for that purpose in
accordance with the terms hereof.

         "Indenture" means this instrument as originally executed and delivered
or, if amended or supplemented as herein provided, as so amended or supplemented
or both, including, for all purposes of this instrument and any such supplement,
the provisions of the Trust Indenture Act of 1939 that are deemed to be a part
of and govern this instrument and any such supplement, respectively, and shall
include the forms and terms of particular series of Securities established as
contemplated hereunder.

         "interest" means, when used with respect to non-interest bearing
Securities (including, without limitation, any Original Issue Discount Security
that by its terms bears interest only after maturity or upon default in any
other payment due on such Security), interest payable after maturity (whether at
stated maturity, upon acceleration or redemption or otherwise) or after the
date, if any, on which the Issuer becomes obligated to acquire a Security,
whether upon conversion, by purchase or otherwise.

         "Issuer" means York International Corporation, a Delaware corporation,
and, subject to Article Nine, its successors and assigns.

         "Issuer Order" means a written statement request or order of the Issuer
which is signed in its name by the chairman of the Board of Directors, the
president or any vice president of the Issuer, and delivered to the Trustee.

                                      -3-
<PAGE>   11

         "Lien" means any mortgage, lien, pledge, security interest, conditional
sale or other title retention agreement or other security interest or
encumbrance of any kind (including any agreement to give any security interest).

         "Officers' Certificate", when used with respect to the Issuer, means a
certificate signed by the chairman of the Board of Directors, the president, or
any vice president and by the treasurer, any assistant treasurer, the
controller, any assistant controller, the secretary or any assistant secretary
of the Issuer. Each such certificate shall include the statements provided for
in Section 11.5 if and to the extent required by the provisions of such Section
11.5. One of the officers signing an Officers' Certificate given pursuant to
Section 4.3 shall be the principal executive, financial or accounting officer of
the Issuer.

         "Opinion of Counsel" means an opinion in writing signed by the chief
counsel of the Issuer or by such other legal counsel who may be an employee of
or counsel to the Issuer and who shall be reasonably satisfactory to the
Trustee. Each such opinion shall include the statements provided for in Section
11.5, if and to the extent required by the provisions of such Section 11.5.

         "original issue date" of any Security (or portion thereof) means the
earlier of (a) the date of such Security or (b) the date of any Security (or
portion thereof) for which such Security was issued (directly or indirectly) on
registration of transfer, exchange or substitution.

         "original issue discount" of any debt security, including any Original
Issue Discount Security, means the difference between the principal amount of
such debt security and the initial issue price of such debt security (as set
forth in the case of an Original Issue Discount Security on the face of such
Security).

         "Original Issue Discount Security" means any Security that provides for
an amount less than the principal amount thereof to be due and payable upon a
declaration of acceleration of the maturity thereof pursuant to Article Five.

         "Outstanding", when used with reference to Securities, shall, subject
to the provisions of Section 7.4, mean, as of any particular time, all
Securities authenticated and delivered by the Trustee under this Indenture,
except:

                  (a)      Securities theretofore cancelled by the Trustee or
         delivered to the Trustee for cancellation;

                  (b)      Securities (other than Securities of any series as to
         which the provisions of Article Ten hereof shall not be applicable), or
         portions thereof, for the payment or redemption of which moneys or U.S.
         Government Obligations (as provided for in Section 10.1) in the
         necessary amount shall have been deposited in trust with the Trustee or
         with any paying agent (other than the Issuer) or shall have been set
         aside, segregated and held in trust by the Issuer for the Holders of
         such Securities (if the Issuer shall act as its own paying agent),
         provided that, if such Securities, or portions thereof, are to be
         redeemed prior to the maturity thereof, notice of such redemption shall
         have been given as herein provided, or provision satisfactory to the
         Trustee shall have been made for giving such notice; and

                                      -4-
<PAGE>   12

                  (c)      Securities which shall have been paid or in
         substitution for which other Securities shall have been authenticated
         and delivered pursuant to the terms of Section 2.9 (except with respect
         to any such Security as to which proof satisfactory to the Trustee is
         presented that such Security is held by a Person in whose hands such
         Security is a legal, valid and binding obligation of the Issuer).

         In determining whether the Holders of the requisite aggregate principal
amount of Outstanding Securities of any or all series have given any request,
demand, authorization, direction, notice, consent or waiver hereunder, the
principal amount of an Original Issue Discount Security that shall be deemed to
be Outstanding for such purposes shall be the portion of the principal amount
thereof that would be due and payable as of the date of such determination (as
certified by the Issuer to the Trustee) upon a declaration of acceleration of
the maturity thereof pursuant to Article Five.

         "Payment Blockage Period" shall have the meaning set forth in Section
13.1(c).

         "Payment Notice" shall have the meaning set forth in Section 13.1(c).

         "Periodic Offering" means an offering of Securities of a series from
time to time, the specific terms of which Securities, including, without
limitation, the rate or rates of interest, if any, thereon, the stated maturity
or maturities thereof and the redemption provisions, if any, with respect
thereto, are to be determined by the Issuer or its agents upon the issuance of
such Securities.

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

         "Place of Payment", when used with respect to the Securities of any
series, means the place or places where the principal of and interest, if any,
on the Securities of such series are payable as determined in accordance with
Section 2.3.

         "principal" of a debt security, including any Security, means the
amount (including, without limitation, if and to the extent applicable, any
premium and, in the case of an Original Issue Discount Security, any accrued
original issue discount, but excluding interest) that is payable with respect to
such debt security as of any date and for any purpose (including, without
limitation, in connection with any sinking fund, if any, upon any redemption at
the option of the Issuer, upon any purchase or exchange at the option of the
Issuer or the holder of such debt security and upon any acceleration of the
maturity of such debt security).

         "principal amount" of a debt security, including any Security, means
the principal amount as set forth on the face of such debt security.

         "record date" shall have the meaning set forth in Section 2.7.

         "Responsible Officer", when used with respect to the Trustee, means any
officer of the Trustee with direct responsibility for the administration of this
Indenture.

                                      -5-
<PAGE>   13

         "Restricted Subsidiary" means any Subsidiary organized and existing
under the laws of the United States of America or Canada, including any branch
of any such Subsidiary whether such branch is located in the United States of
America, Canada or any other country.

         "Securities Act" means the Securities Act of 1933, as amended.

         "Security" or "Securities" has the meaning stated in the first recital
of this Indenture or, as the case may be, Securities that have been
authenticated and delivered pursuant to this Indenture.

         "Senior Indebtedness" means Debt of the Issuer outstanding at any time
except (a) any Debt as to which, by the terms of the instrument creating or
evidencing the same, it is provided that such Debt is not senior or prior in
right of payment to the Securities, (b) the Securities, (c) any Debt of the
Issuer to a wholly-owned Subsidiary of the Issuer, (d) interest accruing after
the filing of a petition initiating any proceeding referred to in Sections
5.1(d) and 5.1(e) unless such interest is an allowed claim enforceable against
the Issuer in a proceeding under federal or state bankruptcy laws and (e) trade
payables.

         "Senior Subordinated Indebtedness" means the Securities and any other
Debt of the Issuer that ranks pari passu with the Securities. Any Debt of the
Issuer that is subordinate or junior by its terms in right of payment to any
other Debt of the Issuer shall be subordinate to Senior Subordinated
Indebtedness unless the instrument creating or evidencing the same or pursuant
to which the same is outstanding specifically provides that such Debt (a) is to
rank pari passu with other Senior Subordinated Indebtedness and (b) is not
subordinated by its terms to any Debt of the Issuer which is not Senior
Indebtedness.

         "Senior Nonmonetary Default" shall have the meaning set forth in
Section 13.1(c).

         "Stated Maturity", when used with respect to any Security or any
installment of interest thereon, shall mean the date specified in such Security
as the fixed date on which the principal of such Security or such installment of
interest is due and payable.

         "Subsidiary" means with respect to any Person, any corporation or other
entity of which a majority of the total voting power of the voting stock
outstanding is, or other ownership interests having voting power under ordinary
circumstances with the power to elect a majority of the board of directors or
other Persons performing similar functions are, at the time directly or
indirectly owned by such Person. Unless otherwise indicated, "Subsidiary" shall
refer only to Subsidiaries of the Issuer.

         "Trust Indenture Act of 1939" (except as otherwise provided in Sections
8.1 and 8.2) means the Trust Indenture Act of 1939, as amended, as in force at
the date as of which this Indenture is originally executed.

         "Trustee" means the Person identified as "Trustee" in the first
paragraph hereof and, subject to the provisions of Article Six, shall also
include any successor trustee. "Trustee" shall also 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 such series.

                                      -6-
<PAGE>   14

         "U.S. Government Obligations" shall have the meaning set forth in
Section 10.1(B).

         "vice president", when used with respect to the Issuer or the Trustee,
means any vice president, regardless of whether designated by a number or a word
or words added before or after the title "vice president".

         "Yield to Maturity" means the yield to maturity on a series of
Securities, calculated at the time of issuance of such series, or, if
applicable, at the most recent redetermination of interest on such series, and
calculated in accordance with generally accepted financial practice or as
otherwise provided in the terms of such series of Securities.

                                  ARTICLE TWO
                                   SECURITIES

         SECTION 2.1    Forms Generally. The Securities of each series shall be
substantially in such form (not inconsistent with this Indenture) as shall be
established by or pursuant to one or more Board Resolutions (as set forth in a
Board Resolution or, to the extent established pursuant to rather than set forth
in a Board Resolution, an Officers' Certificate detailing such establishment) 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 imprinted or otherwise
reproduced thereon such legend or legends or endorsements, not inconsistent with
the provisions of this Indenture, as may be required to comply with any law or
with any rules or regulations pursuant thereto, or with any rules of any
securities exchange or to conform to general usage, all as may be determined by
the officers executing such Securities, as evidenced by their execution 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 2.2    Form of Trustee's Certificate of Authentication. The
Trustee's certificate of authentication on all Securities shall be substantially
as follows:

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

                                            THE BANK OF NEW YORK, as Trustee

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

         If at any time there shall be an Authenticating Agent appointed with
respect to any series of Securities, then the Securities of such series shall
bear, in addition to the Trustee's certificate of authentication, an alternate
Certificate of Authentication which shall be substantially as follows:

                                      -7-
<PAGE>   15

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

                                            THE BANK OF NEW YORK, as Trustee

                                            By
                                              ----------------------------------
                                                    as Authenticating Agent

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

         SECTION 2.3    Amount Unlimited, Issuable in Series. The aggregate
principal amount of Securities which may be authenticated and delivered under
this Indenture is unlimited.

         The Securities may be issued in one or more series and the Securities
of each such series shall rank equally and pari passu with the Securities of
each other series, but all Securities issued hereunder shall be subordinate and
junior in right of payment, to the extent and in the manner set forth in Article
Thirteen, to all Senior Indebtedness. There shall be established in or pursuant
to one or more Board Resolutions (and, to the extent established pursuant to
rather than set forth in a Board Resolution, in an Officers' Certificate
detailing such establishment) or established in one or more indentures
supplemental hereto, prior to the initial issuance of Securities of any series:

                  (1)     the designation of the Securities of the series, which
         shall distinguish the Securities of such series from the Securities of
         all 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 2.8, 2.9, 2.11, 8.5 or
         12.3);

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

                  (4)     the rate or rates at which the Securities of the
         series shall bear interest, if any, the date or dates from which any
         such interest shall accrue, on which any such interest shall be payable
         and on which a record shall be taken for the determination of Holders
         to whom any such interest is payable or the method by which such rate
         or rates or date or dates shall be determined or both;

                  (5)     the place or places where and the manner in which the
         principal of, premium, if any, and interest, if any, on Securities of
         the series shall be payable (if other than as provided in Section 3.2)
         and the office or agency for the Securities of the series maintained by
         the Issuer pursuant to Section 3.2;

                                      -8-
<PAGE>   16

                  (6)     the right, if any, of the Issuer to redeem, purchase
         or repay Securities of the series, in whole or in part, at its option
         and the period or periods within which, the price or prices (or the
         method by which such price or prices shall be determined or both) at
         which, the form or method of payment therefor if other than in cash and
         any terms and conditions upon which, and the manner in which (if
         different from the provisions of Article Twelve), Securities of the
         series may be so redeemed, purchased or repaid, in whole or in part,
         pursuant to any sinking fund or otherwise;

                  (7)     the obligation, if any, of the Issuer to redeem,
         purchase or repay Securities of the series in whole or in part pursuant
         to any mandatory redemption, sinking fund or analogous provisions or at
         the option of a Holder thereof and the period or periods within which
         the price or prices (or the method by which such price or prices shall
         be determined or both) at which, the form or method of payment therefor
         if other than in cash and any terms and conditions upon which, and the
         manner in which (if different from the provisions of Article Twelve),
         Securities of the series shall be redeemed, purchased or repaid, in
         whole or in part, pursuant to such obligation;

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

                  (9)     if other than the principal amount thereof, the
         portion of the principal amount of Securities of the series which shall
         be payable upon acceleration of the maturity thereof;

                  (10)    whether Securities of the series will be issuable as
         Global Securities;

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

                  (12)    any trustees, depositaries, authenticating or paying
         agents, transfer agents or registrars or any other agents with respect
         to the Securities of such series;

                  (13)    any deleted, modified or additional events of default
         or remedies or any additional covenants with respect to the Securities
         of such series;

                  (14)    whether the provisions of Section 10.1(C) will be
         applicable to Securities of such series;

                  (15)    any provision relating to the issuance of Securities
         of such series at an original issue discount (including, without
         limitation, the issue price thereof, the rate or rates at which such
         original issue discount shall accrete, if any, and the date or dates
         from or to which or period or periods during which such original issue
         discount shall accrete at such rate or rates);

                                      -9-
<PAGE>   17

                  (16)    if other than Dollars, the foreign currency in which
         payment of the principal of, premium, if any, and interest, if any, on
         the Securities of such series shall be payable;

                  (17)    if any entity other than The Bank of New York is to
         act as Trustee for the Securities of such series, the name and
         Corporate Trust Office of such Trustee;

                  (18)    if the amounts of payments of principal of, premium,
         if any, and interest, if any, on the Securities of such series are to
         be determined with reference to an index, the manner in which such
         amounts shall be determined; and

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

         All Securities of any one series shall be substantially identical,
except as to denomination and except as may otherwise be provided by or pursuant
to the Board Resolution or Officers' Certificate referred to above or as set
forth in any such indenture supplemental hereto. All Securities of any one
series need not be issued at the same time and may be issued from time to time,
consistent with the terms of this Indenture, if so provided by or pursuant to
such Board Resolution, such Officers' Certificate or in any such indenture
supplemental hereto.

         Any such Board Resolution or Officers' Certificate referred to above
with respect to Securities of any series filed with the Trustee on or before the
initial issuance of the Securities of such series shall be incorporated herein
by reference with respect to Securities of such series and shall thereafter be
deemed to be a part of the Indenture for all purposes relating to Securities of
such series as fully as if such Board Resolution or Officers' Certificate were
set forth herein in full.

         SECTION 2.4    Authentication and Delivery of Securities. The Issuer
may deliver Securities of any series executed by the Issuer to the Trustee for
authentication together with the applicable documents referred to below in this
Section 2.4, and the Trustee shall thereupon authenticate and deliver such
Securities to, or upon the order of, the Issuer (contained in the Issuer Order
referred to below in this Section 2.4) or pursuant to such procedures acceptable
to the Trustee and to such recipients as may be specified from time to time by
an Issuer Order. The maturity date, original issue date, interest rate, if any,
and any other terms of the Securities of such series shall be determined by or
pursuant to such Issuer Order and procedures. If provided for in such procedures
and agreed to by the Trustee, such Issuer Order may authorize authentication and
delivery pursuant to oral instructions from the Issuer or its duly authorized
agent, which instructions shall be promptly confirmed in writing. In
authenticating the Securities of such series and accepting the additional
responsibilities under this Indenture in relation to such Securities, the
Trustee shall be entitled to receive (in the case of subparagraphs (2), (3) and
(4) below only at or before the time of the first request of the Issuer to the
Trustee to authenticate Securities of such series) and (subject to Section 6.1)
shall be fully protected in relying upon, unless and until such documents have
been superseded or revoked:

                  (1)     an Issuer Order requesting such authentication and
         setting forth delivery instructions if the Securities of such series
         are not to be delivered to the Issuer, provided

                                      -10-
<PAGE>   18

         that, with respect to Securities of a series subject to a Periodic
         Offering, (a) such Issuer Order may be delivered by the Issuer to the
         Trustee prior to the delivery to the Trustee of such Securities for
         authentication and delivery, (b) the Trustee shall authenticate and
         deliver Securities of such series for original issue from time to time,
         in an aggregate principal amount not exceeding the aggregate principal
         amount established for such series, pursuant to an Issuer Order or
         pursuant to procedures acceptable to the Trustee as may be specified
         from time to time by an Issuer Order, (c) the maturity date or dates,
         original issue date or dates, interest rate or rates, if any, and any
         other terms of Securities of such series shall be determined by an
         Issuer Order or pursuant to such procedures, (d) if provided for in
         such procedures, such Issuer Order may authorize authentication and
         delivery pursuant to oral or electronic instructions from the Issuer or
         its duly authorized agent or agents, which oral instructions shall be
         promptly confirmed in writing and (e) after the original issuance of
         the first Security of such series to be issued, any separate request by
         the Issuer that the Trustee authenticate Securities of such series for
         original issuance will be deemed to be a certification by the Issuer
         that it is in compliance with all conditions precedent provided for in
         this Indenture relating to the authentication and delivery of such
         Securities;

                  (2)     the Board Resolution, Officers' Certificate or
         executed supplemental indenture referred to in Sections 2.1 and 2.3 by
         or pursuant to which the forms and terms of the Securities of such
         series were established;

                  (3)     an Officers' Certificate setting forth the form or
         forms and terms of the Securities, stating that the form or forms and
         terms of the Securities have been established pursuant to Sections 2.1
         and 2.3 and comply with this Indenture and covering such other matters
         as the Trustee may reasonably request; and

                  (4)     at the option of the Issuer, either an Opinion of
         Counsel, or a letter from legal counsel addressed to the Trustee
         permitting it to rely on an Opinion of Counsel, substantially to the
         effect that:

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

                           (b)   in the case of an underwritten offering, the
                  terms of the Securities of such series have been duly
                  authorized and established in conformity with the provisions
                  of this Indenture, and, in the case of an offering that is not
                  underwritten, certain terms of the Securities of such series
                  have been established pursuant to a Board Resolution, an
                  Officers' Certificate or a supplemental indenture in
                  accordance with this Indenture, and when such other terms as
                  are to be established pursuant to procedures set forth in an
                  Issuer Order shall have been established, all such terms will
                  have been duly authorized by the Issuer and will have been
                  established in conformity with the provisions of this
                  Indenture;

                           (c)   when the Securities of such series have been
                  executed by the Issuer and authenticated by the Trustee in
                  accordance with the provisions of this Indenture and delivered
                  to and duly paid for by the purchasers thereof, they will

                                      -11-
<PAGE>   19

                  have been duly issued under this Indenture and will be valid
                  and legally binding obligations of the Issuer, enforceable in
                  accordance with their respective terms, and will be entitled
                  to the benefits of this Indenture; and

                           (d)   the execution and delivery by the Issuer of,
                  and the performance by the Issuer of its obligations under,
                  the Securities of such series will not contravene any
                  provision of applicable law or the articles of incorporation
                  or bylaws of the Issuer or any agreement or other instrument
                  binding upon the Issuer or any of its Subsidiaries that is
                  material to the Issuer and its Subsidiaries, considered as one
                  enterprise, or, to such counsel's knowledge after the inquiry
                  indicated therein, any judgment, order or decree of any
                  governmental agency or any court having jurisdiction over the
                  Issuer or any Subsidiary, and no consent, approval or
                  authorization of any governmental body or agency is required
                  for the performance by the Issuer of its obligations under the
                  Securities, except such as are specified and have been
                  obtained and such as may be required by the securities or blue
                  sky laws of the various states in connection with the offer
                  and sale of the Securities.

         In addition, if the authentication and delivery relates to a new series
of Securities created by an indenture supplemental hereto, such Opinion of
Counsel shall also state that all laws and requirements with respect to the form
and execution by the Issuer of the supplemental indenture with respect to the
series of Securities have been complied with, the Issuer has corporate power to
execute and deliver any such supplemental indenture and has taken all necessary
corporate action for those purposes and any such supplemental indenture has been
executed and delivered and constitutes the legal, valid and binding obligation
of the Issuer enforceable in accordance with its terms (subject, as to
enforcement of remedies, to applicable bankruptcy, reorganization, insolvency,
moratorium or other laws and legal principles affecting creditors' rights
generally from time to time in effect and to general equitable principles
whether applied in an action at law or in equity).

         In rendering such opinions, such counsel may qualify any opinions as to
enforceability by stating that such enforceability may be limited by bankruptcy,
insolvency, reorganization, liquidation, moratorium and other similar laws
affecting the rights and remedies of creditors and is subject to general
principles of equity (regardless of whether such enforceability is considered in
a proceeding in equity or at law). Such counsel may rely, as to all matters
governed by the laws of jurisdictions other than the State of Delaware and the
federal law of the United States, upon opinions of other counsel (copies of
which shall be delivered to the Trustee), who shall be counsel reasonably
satisfactory to the Trustee, in which case the opinion shall state that such
counsel believes that both such counsel and the Trustee are entitled so to rely.
Such counsel may also state that, insofar as such opinion involves factual
matters, such counsel has relied, to the extent such counsel deems proper, upon
certificates of officers of the Issuer and its Subsidiaries and certificates of
public officials.

         The Trustee shall have the right to decline to authenticate and deliver
any Securities of any series under this Section 2.4 if the Trustee, being
advised by counsel, determines that such action may not lawfully be taken by the
Issuer or if the Trustee in good faith by its board of directors or board of
trustees, executive committee or a trust committee of directors or trustees or
Responsible Officers shall determine that such action would expose the Trustee
to personal

                                      -12-
<PAGE>   20

liability to existing Holders or would adversely affect the Trustee's own
rights, duties or immunities under the Securities, this Indenture or otherwise.

         If the Issuer shall establish pursuant to Section 2.3 that the
Securities of a series are to be issued in the form of one or more Global
Securities, then the Issuer shall execute and the Trustee shall, in accordance
with this Section 2.4 and the Issuer Order with respect to such series,
authenticate and deliver one or more Global Securities that (i) shall represent
and shall be denominated in an amount equal to the aggregate principal amount of
all of the Securities of such series to be issued in the form of Global
Securities and not yet cancelled, (ii) shall be registered in the name of the
Depositary for such Global Security or Securities or the nominee of such
Depositary, (iii) shall be delivered by the Trustee to such Depositary or
pursuant to such Depositary's instructions, and (iv) shall bear a legend
substantially to the following effect: "Unless and until it is exchanged in
whole or in part for Securities in definitive registered form, this Security may
not be transferred except as a whole by the Depositary to the nominee of the
Depositary or by a nominee of the Depositary to the Depositary or another
nominee of the Depositary or by the Depositary or any such nominee to a
successor Depositary or a nominee of such successor Depositary."

         Each Depositary designated pursuant to Section 2.3 must, at the time of
its designation and at all times while it serves as Depositary, be a clearing
agency registered under the Securities Exchange Act of 1934, as amended, and any
other applicable statute or regulation.

         SECTION 2.5    Execution of Securities. The Securities shall be signed
on behalf of the Issuer by the chairman of the Board of Directors, the
president, any vice president or the treasurer of the Issuer, under its
corporate seal which may, but need not, be attested by its secretary or one of
its assistant secretaries. Such signatures may be the manual or facsimile
signatures of the present or any future such officers. The seal of the Issuer
may be in the form of a facsimile thereof and may be impressed, affixed,
imprinted or otherwise reproduced on the Securities. Typographical and other
minor errors or defects in any such reproduction of the seal or any such
signature shall not affect the validity or enforceability of any Security that
has been duly authenticated and delivered by the Trustee.

         In case any officer of the Issuer who shall have signed any of the
Securities shall cease to be such officer before the Security so signed shall be
authenticated and delivered by the Trustee or disposed of by the Issuer, such
Security nevertheless may be authenticated and delivered or disposed of as
though the person who signed such Security had not ceased to be such officer of
the Issuer; and any Security may be signed on behalf of the Issuer by such
persons as, at the actual date of the execution of such Security, shall be the
proper officers of the Issuer, although at the date of the execution and
delivery of this Indenture any such person was not such an officer.

         SECTION 2.6    Certificate of Authentication. Only such Securities as
shall bear thereon a certificate of authentication substantially in the form
hereinbefore recited, executed by the Trustee by the manual signature of one of
its authorized signatories, or its Authenticating Agent, shall be entitled to
the benefits of this Indenture or be valid or obligatory for any purpose. The
execution of such certificate by the Trustee or its Authenticating Agent upon
any Security executed by the Issuer shall be conclusive evidence that the
Security so authenticated has been

                                      -13-
<PAGE>   21

duly authenticated and delivered hereunder and that the Holder is entitled to
the benefits of this Indenture. Each reference in this Indenture to
authentication by the Trustee includes authentication by an agent appointed
pursuant to Section 6.14.

         SECTION 2.7    Denomination and Date of Securities; Payments of
Interest. The Securities of each series shall be issuable in registered form in
denominations established as contemplated by Section 2.3 or, with respect to the
Securities of any series, if not so established, in denominations of $1,000 and
any integral multiple thereof. The Securities of each series shall be numbered,
lettered or otherwise distinguished in such manner or in accordance with such
plan as the officers of the Issuer executing the same may determine with the
approval of the Trustee, as evidenced by the execution and authentication
thereof.

         Each Security shall be dated the date of its authentication. The
Securities of each series shall bear interest, if any, from the date of its
authentication, and such interest, if any, shall be payable on the dates,
established as contemplated by Section 2.3.

         The Person in whose name any Security of any series is registered at
the close of business on any record date applicable to a particular series with
respect to any interest payment date for such series shall be entitled to
receive the interest, if any, payable on such interest payment date
notwithstanding any transfer or exchange of such Security subsequent to the
record date and prior to such interest payment date, except if and to the extent
the Issuer shall default in the payment of the interest due on such interest
payment date for such series, in which case such defaulted interest shall be
paid to the Persons in whose names Outstanding Securities for such series are
registered (a) at the close of business on a subsequent record date (which shall
be not less than five Business Days prior to the date of payment of such
defaulted interest) established by notice given by mail by or on behalf of the
Issuer to the Holders of Securities not less than 15 days preceding such
subsequent record date or (b) as determined by such other procedure as is
mutually acceptable to the Issuer and the Trustee. The term "record date" as
used with respect to any interest payment date (except a date for payment of
defaulted interest) for the Securities of any series shall mean the date
specified as such in the terms of the Securities of such series established as
contemplated by Section 2.3, or, if no such date is so established, if such
interest payment date is the first day of a calendar month, the fifteenth day of
the next preceding calendar month or, if such interest payment date is the
fifteenth day of a calendar month, the first day of such calendar month, whether
or not such record date is a Business Day.

         SECTION 2.8    Registration, Transfer and Exchange. The Issuer will
keep at each office or agency to be maintained for the purpose as provided in
Section 3.2 for each series of Securities a register or registers in which,
subject to such reasonable regulations as it may prescribe, it will provide for
the registration of Securities of each series and the registration of transfer
of Securities of such series. Each such register shall be in written form in the
English language or in any other form capable of being converted into such form
within a reasonable time. At all reasonable times such register or registers
shall be open for inspection and available for copying by the Trustee.

         Upon due presentation for registration of transfer of any Security of
any series at any such office or agency to be maintained for the purpose as
provided in Section 3.2, the Issuer shall execute and the Trustee shall
authenticate and deliver in the name of the transferee or transferees

                                      -14-
<PAGE>   22

a new Security or Securities of the same series, maturity date, interest rate,
if any, and original issue date in authorized denominations for a like aggregate
principal amount.

         All Securities presented for registration of transfer shall (if so
required by the Issuer or the Trustee) be duly endorsed by, or be accompanied by
a written instrument or instruments of transfer in form satisfactory to the
Issuer and the Trustee duly executed by, the Holder or his attorney duly
authorized in writing.

         At the option of the Holder thereof, Securities of any series (other
than a Global Security, except as set forth below) may be exchanged for a
Security or Securities of such series having authorized denominations and an
equal aggregate principal amount, upon surrender of such Securities to be
exchanged at the agency of the Issuer that shall be maintained for such purpose
in accordance with Section 3.2. All Securities surrendered upon any exchange or
registration of transfer provided for in this Indenture shall be promptly
cancelled and returned to the Issuer.

         The Issuer 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 of Securities. No service charge shall be made for any
such transaction or for any exchange of Securities of any series as contemplated
by the immediately preceding paragraph.

         The Issuer shall not be required to exchange or register a transfer of
(a) any Securities of any series for a period of 15 days next preceding the
first mailing or publication of notice of redemption of Securities of such
series to be redeemed, (b) any Securities selected, called or being called for
redemption, in whole or in part, except, in the case of any Security to be
redeemed in part, the portion thereof not so to be redeemed or (c) any Security
if the Holder thereof has exercised his right, if any, to require the Issuer to
repurchase such Security in whole or in part, except the portion of such
Security not required to be repurchased.

         Notwithstanding any other provision of this Section 2.8, unless and
until it is exchanged in whole or in part for Securities in definitive
registered form, a Global Security representing all or a part of the Securities
of a series may not be transferred except as a whole by the Depositary for such
series to a nominee of such Depositary or by a nominee of such Depositary to
such Depositary or another nominee of such Depositary or by such Depositary or
any such nominee to a successor Depositary for such series or a nominee of such
successor Depositary.

         If at any time the Depositary for any Securities of a series
represented by one or more Global Securities notifies the Issuer that it is
unwilling or unable to continue as Depositary for such Securities or if at any
time the Depositary for such Securities shall no longer be eligible under
Section 2.4, the Issuer shall appoint a successor Depositary with respect to
such Securities. If a successor Depositary for such Securities is not appointed
by the Issuer within 90 days after the Issuer receives such notice or becomes
aware of such ineligibility, the Issuer's election pursuant to Section 2.3 that
such Securities be represented by one or more Global Securities shall no longer
be effective and the Issuer shall execute, and the Trustee, upon receipt of an
Issuer Order for the authentication and delivery of definitive Securities of
such series, will authenticate and deliver, Securities of such series in
definitive registered form, in any authorized denominations, in an aggregate
principal amount equal to the principal amount of the Global

                                      -15-
<PAGE>   23

Security or Securities representing such Securities in exchange for such Global
Security or Securities.

         The Issuer may at any time and in its sole discretion determine that
the Securities of any series issued in the form of one or more Global Securities
shall no longer be represented by a Global Security or Securities. In such event
the Issuer shall execute, and the Trustee, upon receipt of an Issuer Order for
the authentication and delivery of definitive Securities of such series, shall
authenticate and deliver, Securities of such series in definitive registered
form, in any authorized denominations, in an aggregate principal amount equal to
the principal amount of the Global Security or Securities representing such
Securities, in exchange for such Global Security or Securities.

         If specified by the Issuer pursuant to Section 2.3 with respect to
Securities represented by a Global Security, the Depositary for such Global
Security may surrender such Global Security in exchange in whole or in part for
Securities of the same series in definitive registered form on such terms as are
acceptable to the Issuer and such Depositary. Thereupon, the Issuer shall
execute, and the Trustee shall authenticate and deliver, without service charge,

                  (i)     to the Person specified by such Depositary, a new
         Security or Securities of the same series, of any authorized
         denominations as requested by such Person, in an aggregate principal
         amount equal to and in exchange for such Person's beneficial interest
         in the Global Security; and

                  (ii)    to such Depositary a new Global Security in a
         denomination equal to the difference, if any, between the principal
         amount of the surrendered Global Security and the aggregate principal
         amount of Securities authenticated and delivered pursuant to clause (i)
         above.

         Upon the exchange of a Global Security for Securities in definitive
registered form in authorized denominations, such Global Security shall be
cancelled by the Trustee or an agent of the Issuer or the Trustee. Securities in
definitive registered form issued in exchange for a Global Security pursuant to
this Section 2.8 shall be registered in such names and in such authorized
denominations as the Depositary for such Global Security, pursuant to
instructions from its direct or indirect participants or otherwise, shall
instruct the Trustee or an agent of the Trustee or the Issuer or an agent of the
Issuer. The Trustee or such agent shall deliver at its office such Securities to
or as directed by the Persons in whose names such Securities are so registered.

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

         SECTION 2.9    Mutilated, Defaced, Destroyed, Lost and Stolen
Securities. In case any temporary or definitive Security shall become mutilated,
defaced or be destroyed, lost or stolen, the Issuer in its discretion may
execute, and upon the written request of any officer of the Issuer, the Trustee
shall authenticate and deliver, a new Security of the same series, maturity
date, interest rate, if any, and original issue date, bearing a number or other
distinguishing

                                      -16-
<PAGE>   24

symbol not contemporaneously outstanding, in exchange and substitution for the
mutilated or defaced Security, or in lieu of and in substitution for the
Security so destroyed, lost or stolen. In every case the applicant for a
substitute Security shall furnish to the Issuer and to the Trustee and any agent
of the Issuer or the Trustee such security or indemnity as may be required by
the Trustee or the Issuer or any such agent to indemnify and defend and to save
each of the Trustee and the Issuer and any such agent harmless and, in every
case of destruction, loss or theft, evidence to their satisfaction of the
destruction, loss or theft of such Security and of the ownership thereof and in
the case of mutilation or defacement, shall surrender the Security to the
Trustee or such agent.

         Upon the issuance of any substitute Security, the Issuer 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 or its agent) connected therewith. In case any
Security which has matured or is about to mature or has been called for
redemption in full shall become mutilated or defaced or be destroyed, lost or
stolen, the Issuer may, instead of issuing a substitute Security, pay or
authorize the payment of the same (without surrender thereof except in the case
of a mutilated or defaced Security), if the applicant for such payment shall
furnish to the Issuer and to the Trustee and any agent of the Issuer or the
Trustee such security or indemnity as any of them may require to hold each of
them harmless, and, in every case of destruction, loss or theft the applicant
shall also furnish to the Issuer and the Trustee and any agent of the Issuer or
the Trustee evidence to the Trustee's satisfaction of the destruction, loss or
theft of such Security and of the ownership thereof.

         Every substitute Security of any series issued pursuant to the
provisions of this Section by virtue of the fact that any such Security is
destroyed, lost or stolen shall constitute an additional contractual obligation
of the Issuer, 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 (but
shall be subject to all the limitations of rights set forth in) this Indenture
equally and proportionately with any and all other Securities of such series
duly authenticated and delivered hereunder. All Securities shall be held and
owned upon the express condition that, to the extent permitted by law, the
foregoing provisions are exclusive with respect to the replacement or payment of
mutilated, defaced, destroyed, lost or stolen Securities and shall preclude any
and all other rights or remedies notwithstanding any law or statute existing or
hereafter enacted to the contrary with respect to the replacement or payment of
negotiable instruments or other securities without their surrender.

         SECTION 2.10   Cancellation of Securities; Disposition Thereof. All
Securities surrendered for payment, redemption, registration of transfer or
exchange, or for credit against any payment in respect of a sinking or analogous
fund, if surrendered to the Issuer or any agent of the Issuer or the Trustee or
any agent of the Trustee, shall be delivered to the Trustee or its agent for
cancellation or, if surrendered to the Trustee, shall be cancelled by it; and no
Securities shall be issued in lieu thereof except as expressly permitted by any
of the provisions of this Indenture. The Trustee shall return all cancelled
Securities to the Company. If the Issuer or its agent shall acquire any of the
Securities, such acquisition shall not operate as a redemption or satisfaction
of the indebtedness represented by such Securities unless and until the same are
delivered to the Trustee or its agent for cancellation.

                                      -17-
<PAGE>   25

         SECTION 2.11   Temporary Securities. Pending the preparation of
definitive Securities for any series, the Issuer may execute and the Trustee
shall authenticate and deliver temporary Securities for such series (printed,
lithographed, typewritten or otherwise reproduced, in each case in form
satisfactory to the Trustee). Temporary Securities of any series shall be
issuable in any authorized denomination, and substantially in the form of the
definitive Securities of such series but with such omissions, insertions and
variations as may be appropriate for temporary Securities, all as may be
determined by the Issuer with the concurrence of the Trustee as evidenced by the
execution and authentication thereof. Temporary Securities may contain such
references to any provisions of this Indenture as may be appropriate. Every
temporary Security shall be executed by the Issuer and be authenticated by the
Trustee upon the same conditions and in substantially the same manner, and with
like effect, as the definitive Securities. Without unreasonable delay the Issuer
shall execute and shall furnish definitive Securities of such series and
thereupon temporary Securities of such series may be surrendered in exchange
therefor without charge at each office or agency to be maintained by the Issuer
for that purpose pursuant to Section 3.2 and the Trustee shall authenticate and
deliver in exchange for such temporary Securities of such series an equal
aggregate principal amount of definitive Securities of the same series having
authorized denominations. Until so exchanged, the temporary Securities of any
series shall be entitled to the same benefits under this Indenture as definitive
Securities of such series, unless otherwise established pursuant to Section 2.3.

         SECTION 2.12   CUSIP Numbers. The Issuer in issuing the Securities may
use "CUSIP" numbers (if then generally in use), and, if so, the Trustee shall
use "CUSIP" numbers in notices of redemption as a convenience to Holders;
provided that any such notice may state that no representation is made as to the
correctness of such numbers either as printed on the Securities or as contained
in any notice of a redemption and that reliance may be placed only on the other
identification numbers printed on the Securities, and any such redemption shall
not be affected by any defect in or omission of such numbers.

                                 ARTICLE THREE
                             COVENANTS OF THE ISSUER

         Subject to the provisions of Article Ten, the Company covenants for the
benefit of the Securityholders that:

         SECTION 3.1    Payment of Principal and Interest. (a) The Issuer will
punctually pay the principal and interest, if any, to become due in respect of
the Securities according to the terms of the Securities and this Indenture.
Payments of principal and interest shall be made at the Corporate Trust Office.

         (b) The Issuer shall pay interest on overdue principal and interest on
overdue installments of interest, to the extent lawful, at the rate per annum
set forth in the Securities.

         SECTION 3.2    Maintenance of Office or Agency for Notices and Demands.
The Issuer will maintain in The City of New York an office or agency where the
Securities may be presented for payment, an office or agency where the
Securities may be presented for registration of transfer and for exchange as
provided in this Indenture and an office or agency where notices and demands to
or upon the Issuer in respect of such Securities or of this Indenture may be

                                      -18-
<PAGE>   26

served. Until otherwise designated by the Issuer in a written notice to the
Trustee, such office or agency in The City of New York shall be _____________,
an Affiliate of the Trustee located at ____________________________. If at any
time the Issuer shall fail to maintain any such required office, such
presentations and demands may also be made and notices may also be served at the
Corporate Trust Office.

         SECTION 3.3    Officers' Annual Compliance Certificate Filed with the
Trustee. Within 120 days after the close of each fiscal year of the Issuer
ending after the date hereof, the Issuer will file with the Trustee a
certificate signed by the chairman of the Board of Directors, the chief
executive officer, the president or any vice president and by the chief
financial officer, treasurer or any assistant treasurer or the secretary or any
assistant secretary of the Issuer (provided that one of such signatories shall
be the Issuer's principal executive officer, principal financial officer or
principal accounting officer), as to such officers' knowledge of the Issuer's
compliance with all conditions and covenants under this Indenture (without
regard to any period of grace or requirement of notice provided hereunder) and
in the event any Default of the Issuer exists, such officers shall specify the
nature of such Default.

         SECTION 3.4    Corporate Existence. Subject to Article Nine, the Issuer
will do or cause to be done all things necessary to preserve and keep in full
force and effect its corporate existence and its material rights (charter and
statutory) and franchises; provided, however, that the Issuer shall not be
required to preserve any such material right or franchise if the preservation
thereof is no longer desirable in the conduct of the business of the Issuer or
the loss thereof is not materially adverse to the Holders of the Securities.

         SECTION 3.5    Payment of Taxes and Other Claims. The Issuer will pay
or discharge or cause to be paid or discharged, before any penalty accrues
thereon, (a) all material taxes, assessments and governmental charges levied or
imposed upon the Issuer or any Subsidiary or upon the income, profits or
property of the Issuer or any Subsidiary, and (b) all material lawful claims for
labor, materials and supplies which, if unpaid, might by law become a Lien upon
the property of the Issuer or any Restricted Subsidiary; provided, however, that
the Issuer 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.

                                  ARTICLE FOUR
                    SECURITYHOLDERS LISTS AND REPORTS BY THE
                             ISSUER AND THE TRUSTEE

         SECTION 4.1    Issuer to Furnish Trustee Information as to Names and
Addresses of Securityholders. The Issuer and any other obligor on the Securities
covenant and agree that they will furnish or cause to be furnished to the
Trustee a list in such form as the Trustee may reasonably require of the names
and addresses of the Holders of the Securities of each series:

                  (a)     semiannually and not more than 15 days after each
         January 1 and July 1, and

                                      -19-
<PAGE>   27

                  (b)     at such other times as the Trustee may request in
         writing, within 30 days after receipt by the Issuer of any such
         request,

provided that if and so long as the Trustee shall be the registrar for such
series, such list shall not be required to be furnished.

         SECTION 4.2    Preservation and Disclosure of Securityholders Lists.
(a) The Trustee shall preserve, in as current a form as is reasonably
practicable, all information as to the names and addresses of the Holders of
each series of Securities (i) contained in the most recent list furnished to it
as provided in Section 4.1, and (ii) received by it in the capacity of registrar
or paying agent for such series, if so acting. The Trustee may destroy any list
furnished to it as provided in Section 4.1 upon receipt of a new list so
furnished.

         (b)      In case three or more Holders of Securities (hereinafter
referred to as "applicants") apply in writing to the Trustee and furnish to the
Trustee reasonable proof that each such applicant has owned a Security for a
period of at least six months preceding the date of such application, and such
application states that the applicants desire to communicate with other Holders
of Securities of a particular series (in which case the applicants must all hold
Securities of such series) or with Holders of all Securities with respect to
their rights under this Indenture or under such Securities and such application
is accompanied by a copy of the form of proxy or other communication which such
applicants propose to transmit, then the Trustee shall, within five Business
Days after the receipt of such application, at its election, either

                  (i)     afford to such applicants access to the information
         preserved at the time by the Trustee in accordance with the provisions
         of subsection (a) of this Section 4.2, or

                  (ii)    inform such applicants as to the approximate number of
         Holders of Securities of such series or of all Securities, as the case
         may be, whose names and addresses appear in the information preserved
         at the time by the Trustee, in accordance with the provisions of
         subsection (a) of this Section 4.2, and as to the approximate cost of
         mailing to such Securityholders the form of proxy or other
         communication, if any, specified in such application.

         If the Trustee shall elect not to afford to such applicants access to
such information, the Trustee shall, upon the written request of such
applicants, mail to each Securityholder of such series or all Holders of
Securities, as the case may be, whose name and address appears in the
information preserved at the time by the Trustee in accordance with the
provisions of subsection (a) of this Section 4.2, a copy of the form of proxy or
other communication which is specified in such request, with reasonable
promptness after a tender to the Trustee of the material to be mailed and of
payment, or provision for the payment, of the reasonable expenses of mailing,
unless within five days after such tender, the Trustee shall mail to such
applicants and file with the Commission, together with a copy of the material to
be mailed, a written statement to the effect that, in the opinion of the
Trustee, such mailing would be contrary to the best interests of the Holders of
Securities of such series or of all Securities, as the case may be, or would be
in violation of applicable law. Such written statement shall specify the basis
of such opinion. If the Commission, after opportunity for a hearing upon the
objections specified in the written statement so filed, shall enter an order
refusing to sustain any of such objections or if, after the

                                      -20-
<PAGE>   28

entry of an order sustaining one or more of such objections, the Commission
shall find, after notice and opportunity for hearing, that all the objections so
sustained have been met, and shall enter an order so declaring, the Trustee
shall mail copies of such material to all such Securityholders with reasonable
promptness after the entry of such order and the renewal of such tender;
otherwise the Trustee shall be relieved of any obligation or duty to such
applicants respecting their application.

         (c)      Each and every Holder of Securities, by receiving and holding
the same, agrees with the Issuer and the Trustee that neither the Issuer nor the
Trustee nor any agent of the Issuer or the Trustee shall be held accountable by
reason of the disclosure of any such information as to the names and addresses
of the Holders of Securities in accordance with the provisions of subsection (b)
of this Section 4.2, regardless of the source from which such information was
derived, and that the Trustee shall not be held accountable by reason of mailing
any material pursuant to a request made under such subsection (b).

         SECTION 4.3    Reports by the Issuer. The Issuer covenants:

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

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

         (c)      to transmit by mail to the Holders of Securities within 30
days after the filing thereof with the Trustee, in the manner and to the extent
provided in Section 4.4(c), such summaries of any information, documents and
reports required to be filed by the Issuer pursuant to subsections (a) and (b)
of this Section 4.3 as may be required to be transmitted to such Holders by
rules and regulations prescribed from time to time by the Commission.

         SECTION 4.4    Reports by the Trustee. (a) Within 60 days after May 15
of each year commencing with the May 15 following the date of this Indenture,
the Trustee shall transmit by mail to the Holders of Securities, as provided in
subsection (c) of this Section 4.4, a brief report dated as of such May 15 with
respect to any of the following events which may have occurred within the last
12 months (but if no such event has occurred within such period, no report need
be transmitted):

                                      -21-
<PAGE>   29

             (i)        any change to its eligibility under Section 6.9 and
         its qualification under Section 6.8;

             (ii)       the creation of, or any material change to, a
         relationship specified in paragraph (1) through (10) of Section 310(b)
         of the Trust Indenture Act of 1939;

             (iii)      the character and amount of any advances (and if the
         Trustee elects so to state, the circumstances surrounding the making
         thereof) made by the Trustee (as such) which remain unpaid on the date
         of such report and for the reimbursement of which it claims or may
         claim a lien or charge, prior to that of the Securities of any series,
         on any property or funds held or collected by it as Trustee, except
         that the Trustee shall not be required (but may elect) to report such
         advances if such advances so remaining unpaid aggregate not more than
         1/2 of 1% of the principal amount of all Securities Outstanding on the
         date of such report;

             (iv)       the amount, interest rate, if any, and maturity date
         of all other indebtedness owing by the Issuer (or by any other obligor
         on the Securities) to the Trustee in its individual capacity on the
         date of such report, with a brief description of any property held as
         collateral security therefor, except any indebtedness based upon a
         creditor relationship arising in any manner described in Section
         6.13(b);

             (v)        any change to the property and funds, if any,
         physically in the possession of the Trustee (as such) on the date of
         such report;

             (vi)       any additional issue of Securities which the Trustee
         has not previously reported; and

             (vii)      any action taken by the Trustee in the performance of
         its duties under this Indenture which it has not previously reported
         and which in its opinion materially affects the Securities, except
         action in respect of a Default, notice of which has been or is to be
         withheld by it in accordance with the provisions of Article Five.

         (b)      The Trustee shall transmit to the Securityholders of each
series, as provided in subsection (c) of this Section 4.4, a brief report with
respect to the character and amount of any advances (and if the Trustee elects
so to state, the circumstances surrounding the making thereof) made by the
Trustee, as such, since the date of the last report transmitted pursuant to the
provisions of subsection (a) of this Section 4.4 (or if no such report has yet
been so transmitted, since the date of this Indenture) for the reimbursement of
which it claims or may claim a lien or charge prior to that of the Securities of
such series on property or funds held or collected by it as Trustee and which it
has not previously reported pursuant to this subsection (b), except that the
Trustee shall not be required (but may elect) to report such advances if such
advances remaining unpaid at any time aggregate 10% or less of the principal
amount of all Securities Outstanding at such time, such report to be transmitted
within 90 days after such time.

         (c)      Reports pursuant to this Section shall be transmitted by mail:

             (i)        to all Holders of Securities, as the names and addresses
         of such Holders appear upon the registry books of the Issuer; and

                                      -22-
<PAGE>   30

             (ii)       to all other Persons to whom such reports are required
         to be transmitted pursuant to Section 313(c) of the Trust Indenture Act
         of 1939.

         (d)      A copy of each such report shall, at the time of such
transmission to Securityholders, be furnished to the Issuer and be filed by the
Trustee with each stock exchange upon which the Securities of any applicable
series are listed and also with the Commission. The Issuer agrees to promptly
notify the Trustee with respect to any series when and as the Securities of such
series become admitted to trading on any national securities exchange.

                                  ARTICLE FIVE
                   REMEDIES OF THE TRUSTEE AND SECURITYHOLDERS
                               ON EVENT OF DEFAULT

         SECTION 5.1    Events of Default. "Event of Default", wherever used
herein with respect to Securities of any series, means any one or more of the
following events (whatever the reason for such Event of Default and whether it
shall be occasioned by the provisions of Article Thirteen or otherwise), unless
it is either inapplicable to a particular series or it is specifically deleted
or modified in or pursuant to the Board Resolution, Officers' Certificate or
supplemental indenture establishing such series of Securities or in the form of
Security, for such series:

                  (a)     Failure to pay any installment of interest on any of
         the Securities of such series, when and as the same shall become due
         and payable as therein expressed, and such failure shall continue for a
         period of 30 days (it being understood that if the entire amount of
         such payment of interest is irrevocably deposited by the Issuer with
         the Trustee, or with another paying agent duly appointed hereunder,
         before the expiration of such period of 30 days, such default shall no
         longer be considered to be continuing under this Indenture); or

                  (b)     Failure to pay the principal of the Securities of such
         series when and as the same shall become due and payable, whether at
         Stated Maturity thereof or otherwise; or

                  (c)     Failure to perform or observe any other of the
         covenants, conditions or agreements on the part of the Issuer in this
         Indenture (other than a covenant, condition or agreement a Default in
         whose performance or whose breach is elsewhere in this Section
         specifically dealt with) or in the Securities of such series, and such
         failure shall continue for a period of 60 days after written notice
         specifying the failure and that the same is a Default and requiring the
         Issuer to remedy such failure shall have been given to the Issuer from
         the Trustee or to the Issuer and to the Trustee from the Holders of not
         less than 25% of the principal amount of the Securities of such series
         then Outstanding; or

                  (d)     If the Issuer or any Subsidiary shall file a petition
         commencing a voluntary case under any provision of Bankruptcy Law; or
         the Issuer or any Subsidiary shall file a petition or answer or consent
         seeking reorganization, arrangement, adjustment, or composition under
         any Bankruptcy Law, or shall consent to the filing of any such
         petition, answer, or consent; or the Issuer or any Subsidiary shall
         appoint, or consent to the appointment of, a custodian, receiver,
         liquidator, trustee, assignee, sequestrator or other similar official
         in bankruptcy or insolvency of the Issuer or any Subsidiary or of

                                      -23-
<PAGE>   31

         any substantial part of its property; or shall make an assignment for
         the benefit of creditors; or

                  (e)     If any order for relief against the Issuer or any
         Subsidiary shall have been entered by a court having jurisdiction in
         the premises under any provision of Bankruptcy Law and such order shall
         have continued undischarged or unstayed for a period of 120 days; or a
         decree or order by a court having jurisdiction in the premises shall
         have been entered approving as properly filed a petition seeking
         reorganization, arrangement, adjustment, or composition of the Issuer
         under any Bankruptcy Law, and such decree or order shall have continued
         undischarged or unstayed for a period of 120 days; or a decree or order
         of a court having jurisdiction in the premises for the appointment of a
         custodian, receiver, liquidator, trustee, assignee, sequestrator, or
         other similar official in bankruptcy or insolvency of the Issuer or any
         Subsidiary or of any substantial part of its property, or for the
         winding up or liquidation of its affairs, shall have been entered, and
         such decree or order shall have remained in force undischarged or
         unstayed for a period of 120 days.

         If an Event of Default specified in Section 5.1(a), 5.1(b) or 5.1(c)
with respect to Securities of any series then Outstanding occurs and is
continuing, then and in each and every such case, unless the principal of all of
the Securities of such series shall have already become due and payable, either
the Trustee or the Holders of not less than 25% in aggregate principal amount of
the Securities of such series then Outstanding, by notice in writing to the
Issuer (and to the Trustee if given by Securityholders), may declare the
principal (or, if the Securities of such series are Original Issue Discount
Securities, such portion of the principal amount as may be specified in the
terms of such series) of all the Securities of such series and the interest, if
any, accrued thereon to be due and payable immediately, and upon any such
declaration the same shall become and shall be immediately due and payable,
notwithstanding anything to the contrary contained in this Indenture or in the
Securities of such series. This provision, however, is subject to the condition
that, if at any time after the unpaid principal amount (or such specified
amount) of the Securities of such series shall have been so declared due and
payable and before any judgment or decree for the payment of the moneys due
shall have been obtained or entered as hereinafter provided, the Issuer shall
pay or shall deposit with the Trustee a sum sufficient to pay all matured
installments of interest, if any, upon all of the Securities of such series and
the principal of any and all Securities of such series which shall have become
due otherwise than by acceleration (with interest on overdue installments of
interest, if any, to the extent that payment of such interest is enforceable
under applicable law and on such principal at the rate borne by the Securities
of such series to the date of such payment or deposit) and the reasonable
compensation, disbursements, expenses and advances of the Trustee and all other
amounts due the Trustee under Section 6.6, and any and all Defaults under this
Indenture, other than the nonpayment of such portion of the principal amount of
and accrued interest, if any, on Securities of such series which shall have
become due by acceleration, shall have been cured or shall have been waived in
accordance with Section 5.7 or provision deemed by the Trustee to be adequate
shall have been made therefor, then and in every such case the Holders of a
majority in aggregate principal amount of the Securities of such series then
Outstanding, by written notice to the Issuer and to the Trustee may rescind and
annul such declaration and its consequences; but no such rescission and
annulment shall extend to or shall affect any subsequent Default, or shall
impair any right consequent thereon. If any Event of Default specified in
Section 5.1(d) or 5.1(e) occurs, all unpaid principal amount (or, if the
Securities of any series then Outstanding are

                                      -24-
<PAGE>   32

Original Issue Discount Securities, such portion of the principal amount as may
be specified in the terms of each such series) and accrued interest on all
Securities of each series then Outstanding shall ipso facto become and be
immediately due and payable without any declaration or other act by the Trustee
or any Securityholder.

         If the Trustee shall have proceeded to enforce any right under this
Indenture and such proceedings shall have been discontinued or abandoned because
of such rescission or annulment or for any other reason or shall have been
determined adversely to the Trustee, then and in every such case the Issuer, the
Trustee and the Securityholders shall be restored respectively to their several
positions and rights hereunder, and all rights, remedies and powers of the
Issuer, the Trustee and the Securityholders shall continue as though no such
proceeding had been taken.

         Except with respect to an Event of Default pursuant to Section 5.1 (a)
or (b), the Trustee shall not be charged with knowledge of any Event of Default
unless written notice thereof shall have been given to a Responsible Officer by
the Issuer, a paying agent or any Securityholder.

         SECTION 5.2    Payment of Securities on Default; Suit Therefor. The
Issuer covenants that (a) if Default shall be made in the payment of any
installment of interest upon any of the Securities of any series then
Outstanding as and when the same shall become due and payable, and such Default
shall have continued for a period of 30 days, or (b) if Default shall be made in
the payment of the principal of any of the Securities of such series as and when
the same shall have become due and payable, whether at the Stated Maturity of
the Securities of such series or upon redemption or by declaration or otherwise,
then, upon demand of the Trustee, the Issuer will pay to the Trustee, for the
benefit of the Holders of the Securities, the whole amount that then shall have
become due and payable on all such Securities of such series for principal or
interest, if any, or both, as the case may be, with interest upon the overdue
principal and (to the extent that payment of such interest is enforceable under
applicable law) upon the overdue installments of interest, if any, at the rate
borne by the Securities of such series; and, in addition thereto, such further
amount as shall be sufficient to cover the costs and expenses of collection,
including a reasonable compensation to the Trustee, its agents, attorneys and
counsel, and any expenses or liabilities incurred by the Trustee hereunder other
than through its negligence or bad faith.

         If the Issuer shall fail forthwith to pay such amounts upon such
demand, the Trustee, in its own name and as trustee of an express trust, shall
be entitled and empowered to institute any actions or proceedings at law or in
equity for the collection of the sums so due and unpaid, and may prosecute any
such action or proceeding to judgment or final decree, and may enforce any such
judgment or final decree against the Issuer or any other obligor on the
Securities of such series and collect in the manner provided by law out of the
property of the Issuer or any other obligor on the Securities of such series,
wherever situated, the moneys adjudged or decreed to be payable.

         If there shall be pending proceedings for the bankruptcy or for the
reorganization of the Issuer or any other obligor on the Securities of any
series then Outstanding under any bankruptcy, insolvency or other similar law
now or hereafter in effect, or if a receiver or trustee or similar official
shall have been appointed for the property of the Issuer or such other obligor,
or in the case of any other similar judicial proceedings relative to the Issuer
or other obligor upon

                                      -25-
<PAGE>   33

the Securities of such series, or to the creditors or property of the Issuer or
such other obligor, the Trustee, irrespective of whether the principal of the
Securities of such series shall then be due and payable as therein expressed or
by declaration or otherwise and irrespective of whether the Trustee shall have
made any demand pursuant to the provisions of this Section 5.2, shall be
entitled and empowered by intervention in such proceedings or otherwise to file
and prove a claim or claims for the whole amount of principal and interest, if
any, owing and unpaid in respect of the Securities of such series, and, in case
of any judicial proceedings, to file such proofs of claim and other papers or
documents as may be necessary or advisable in order to have the claims of the
Trustee and of the Securityholders allowed in such judicial proceedings relative
to the Issuer or any other obligor on the Securities of such series, its or
their creditors, or its or their property, and to collect and receive any moneys
or other property payable or deliverable on any such claims, and to distribute
the same after the deduction of its charges and expenses, and any receiver,
assignee or trustee or similar official in bankruptcy or reorganization is
hereby authorized by each of the Securityholders to make such payments to the
Trustee, and, if the Trustee shall consent to the making of such payments
directly to the Securityholders, to pay to the Trustee any amount due it for
compensation and expenses or otherwise pursuant to Section 6.6, including
counsel fees and expenses incurred by it up to the date of such distribution. To
the extent that such payment of reasonable compensation, expenses and counsel
fees and expenses out of the estate in any such proceedings shall be denied for
any reason, payment of the same shall be secured by a lien on, and shall be paid
out of, any and all distributions, dividends, moneys, securities and other
property which the Holders of the Securities of such series may be entitled to
receive in such proceedings, whether in liquidation or under any plan of
reorganization or arrangement or otherwise.

         All rights of action and of asserting claims under this Indenture, or
under any of the Securities, may be enforced by the Trustee without the
possession of any of the Securities, or the production thereof at any trial or
other proceeding relative thereto, and any such suit or proceeding instituted by
the Trustee shall be brought in its own name as trustee of an express trust, and
any recovery of judgment shall be for the ratable benefit of the Holders of the
Securities of the series in respect of which such judgment has been recovered.

         SECTION 5.3    Application of Moneys Collected by Trustee. Any moneys
collected by the Trustee pursuant to Section 5.2 with respect to Securities of
any series then Outstanding shall be applied in the order following, at the date
or dates fixed by the Trustee for the distribution of such moneys, upon
presentation of the several Securities of such series, and stamping thereon the
payment, if only partially paid, and upon surrender thereof, if fully paid:

                  FIRST: To the payment of costs and expenses of collection and
         reasonable compensation to the Trustee, its agents, attorneys and
         counsel, and of all other expenses and liabilities incurred, and all
         advances made, by the Trustee pursuant to Section 6.6 except as a
         result of its negligence or bad faith;

                  SECOND: If the principal of the Outstanding Securities of such
         series shall not have become due and be unpaid, to the payment of
         interest, if any, on the Securities of such series, in the order of the
         maturity of the installments of such interest, if any, with interest
         (to the extent that such interest has been collected by the Trustee)
         upon the

                                      -26-
<PAGE>   34

         overdue installments of interest, if any, at the rate borne by the
         Securities of such series, such payment to be made ratably to the
         Persons entitled thereto;

                  THIRD: If the principal of the Outstanding Securities of such
         series shall have become due, by declaration or otherwise, to the
         payment of the whole amount then owing and unpaid upon the Securities
         of such series for principal and interest, if any, with interest on the
         overdue principal and (to the extent that such interest has been
         collected by the Trustee) upon overdue installments of interest, if
         any, at the rate borne by the Securities of such series; and in case
         such moneys shall be insufficient to pay in full the whole amounts so
         due and unpaid upon the Securities of such series, then to the payment
         of such principal and interest, if any, without preference or priority
         of principal over interest or of interest over principal, or of any
         installment of interest over any other installment of interest, or of
         any Security over any other Security, ratably to the aggregate of such
         principal and accrued and unpaid interest; and

                  FOURTH: To the payment of any surplus then remaining to the
         Issuer, its successors or assigns, or to whomsoever may be lawfully
         entitled to receive the same.

         No claim for interest which in any manner at or after maturity shall
have been transferred or pledged separate or apart from the Securities to which
it relates, or which in any manner shall have been kept alive after maturity by
an extension (otherwise than pursuant to an extension made pursuant to a plan
proposed by the Issuer to the Holders of all Securities of any series then
Outstanding), purchase, funding or otherwise by or on behalf or with the consent
or approval of the Issuer shall be entitled, in case of a Default hereunder, to
any benefit of this Indenture, except after prior payment in full of the
principal of all Securities of any series then Outstanding and of all claims for
interest not so transferred, pledged, kept alive, extended, purchased or funded.

         SECTION 5.4    Proceedings by Securityholders. No Holder of any
Securities of any series then Outstanding shall have any right by virtue of or
by availing of any provision of this Indenture to institute any suit, action or
proceeding in equity or at law upon or under or with respect to this Indenture
or for the appointment of a receiver or trustee or similar official, or for any
other remedy hereunder, unless such Holder previously shall have given to the
Trustee written notice of Default and of the continuance thereof, as
hereinbefore provided, and unless the Holders of not less than 25% in aggregate
principal amount of the Securities of such series then Outstanding shall have
made written request to the Trustee to institute such action, suit or proceeding
in its own name as Trustee hereunder and shall have offered to the Trustee such
reasonable indemnity as it may require against the costs, expenses and
liabilities to be incurred therein or thereby, and the Trustee for 60 days after
its receipt of such notice, request and offer of indemnity, shall have neglected
or refused to institute any such action, suit or proceeding, it being understood
and intended, and being expressly covenanted by the Holder of every Security of
such series with every other taker and Holder and the Trustee, that no one or
more Holders of Securities of such series shall have any right in any manner
whatever by virtue of or by availing of any provision of this Indenture or of
the Securities to affect, disturb or prejudice the rights of any other Holder of
such Securities of such series, or to obtain or seek to obtain priority over or
preference as to any other such Holder, or to enforce any right under this
Indenture or the Securities, except in the manner herein provided and for the
equal, ratable and common benefit of all Holders of Securities of such series.

                                      -27-
<PAGE>   35

         Notwithstanding any other provisions in this Indenture, but subject to
Article Thirteen, however, the right of any Holder of any Security to receive
payment of the principal of, premium, if any, and interest, if any, on such
Security, on or after the respective due dates expressed in such Security, or to
institute suit for the enforcement of any such payment on or after such
respective dates shall not be impaired or affected without the consent of such
Holder.

         SECTION 5.5    Proceedings by Trustee. In case of an Event of Default
hereunder, the Trustee may in its discretion proceed to protect and enforce the
rights vested in it by this Indenture by such appropriate judicial proceedings
as the Trustee shall deem most effectual to protect and enforce any of such
rights, either by suit in equity or by action at law or by proceedings in
bankruptcy or otherwise, whether for the specific enforcement of any covenant or
agreement contained in this Indenture or in aid of the exercise of any power
granted in this Indenture, or to enforce any other legal or equitable right
vested in the Trustee by this Indenture or by law.

         SECTION 5.6    Remedies Cumulative and Continuing. All powers and
remedies given by this Article Five to the Trustee or to the Securityholders
shall, to the extent permitted by law, be deemed cumulative and not exclusive of
any thereof or of any other powers and remedies available to the Trustee or the
Securityholders, by judicial proceedings or otherwise, to enforce the
performance or observance of the covenants and agreements contained in this
Indenture, and no delay or omission of the Trustee or of any Securityholder to
exercise any right or power accruing upon any Default occurring and continuing
as aforesaid shall impair any such right or power, or shall be construed to be a
waiver of any such Default or an acquiescence therein; and, subject to the
provisions of Section 5.4, every power and remedy given by this Article Five or
by law to the Trustee or to the Securityholders may be exercised from time to
time, and as often as shall be deemed expedient, by the Trustee or by the
Securityholders.

         SECTION 5.7    Direction of Proceedings; Waiver of Defaults by Majority
of Securityholders. The Holders of a majority in aggregate principal amount of
the Securities of any series then Outstanding 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 Securities of such series; provided, however, that (subject to the
provisions of Section 6.1) the Trustee shall have the right to decline to follow
any such direction if the Trustee shall determine upon advice of counsel that
the action or proceeding so directed may not lawfully be taken or if the Trustee
in good faith by its board of directors, its executive committee, or a trust
committee of directors or Responsible Officers or both shall determine that the
action or proceeding so directed would involve the Trustee in personal liability
unless such Holders provide the Trustee with indemnity satisfactory to it. The
Holders of a majority in aggregate principal amount of the Securities of any
series then Outstanding may on behalf of the Holders of all of the Securities of
such series waive any past Default or Event of Default hereunder and its
consequences except a Default in the payment of interest, if any, on, or the
principal of, the Securities of such series. Upon any such waiver the Issuer,
the Trustee and the Holders of the Securities of such series shall be restored
to their former positions and rights hereunder, respectively; but no such waiver
shall extend to any subsequent or other Default or Event of Default or impair
any right consequent thereon. Whenever any Default or Event of Default hereunder
shall have been waived as permitted by this Section 5.7, said Default or Event

                                      -28-
<PAGE>   36

of Default shall for all purposes of the Securities and this Indenture be deemed
to have been cured and to be not continuing.

         SECTION 5.8    Notice of Defaults. The Trustee shall, within 90 days
after the occurrence of a Default, with respect to Securities of any series then
Outstanding, mail to all Holders of Securities of such series, as the names and
the addresses of such Holders appear upon the Securities register, notice of all
Defaults known to the Trustee with respect to such series, unless such Defaults
shall have been cured before the giving of such notice (the term "Defaults" for
the purpose of this Section 5.8 being hereby defined to be the events specified
in clauses (a), (b), (c), (d) and (e) of Section 5.1, not including periods of
grace, if any, provided for therein and irrespective of the giving of the
written notice specified in said clause (c) but in the case of any Default of
the character specified in said clause (c) no such notice to Securityholders
shall be given until at least 60 days after the giving of written notice thereof
to the Issuer pursuant to said clause (c)); provided, however, that, except in
the case of Default in the payment of the principal of, premium, if any, or
interest, if any, on any of the Securities, or in the payment or satisfaction of
any sinking fund or other purchase obligation, the Trustee shall be protected in
withholding such notice if and so long as the board of directors, the executive
committee, or a trust committee of directors or Responsible Officers or both of
the Trustee in good faith determines that the withholding of such notice is in
the best interests of the Securityholders.

         SECTION 5.9    Undertaking to Pay Costs. All parties to this Indenture
agree, and each Holder of any Security by his acceptance thereof shall be deemed
to have agreed, that any court may in its discretion require, in any suit for
the enforcement of any right or remedy under this Indenture, or in any suit
against the Trustee for any action taken or omitted by it as Trustee, the filing
by any party litigant in such suit of an undertaking to pay the cost of such
suit, and that such court may in its discretion assess reasonable costs,
including reasonable attorneys' fees and expenses, against any party litigant in
such suit, having due regard to the merits and good faith of the claims or
defenses made by such party litigant; but the provisions of this Section 5.9
shall not apply to any suit instituted by the Trustee, to any suit instituted by
any Securityholder, or group of Securityholders, holding in the aggregate more
than 10% in principal amount of the Securities of any series then Outstanding,
or to any suit instituted by any Securityholders for the enforcement of the
payment of the principal of or interest, if any, on any Security against the
Issuer on or after the due date expressed in such Security.

                                  ARTICLE SIX
                             CONCERNING THE TRUSTEE

         SECTION 6.1    Duties and Responsibilities of the Trustee; During
Default; Prior to Default. With respect to the Holders of any series of
Securities issued hereunder, the Trustee, prior to the occurrence of an Event of
Default with respect to the Securities of a particular series and after the
curing or waiving of all Events of Default which may have occurred with respect
to such series, undertakes to perform such duties and only such duties as are
specifically set forth in this Indenture. In case an Event of Default with
respect to the Securities of a series has occurred (which has not been cured or
waived) the Trustee shall exercise with respect to such series of Securities
such of the rights and powers vested in it by this Indenture, and use the same
degree of care and skill in their exercise as a prudent man would exercise or
use under the circumstances in the conduct of his own affairs.

                                      -29-
<PAGE>   37

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

                  (a)     prior to the occurrence of an Event of Default with
         respect to the Securities of any series and after the curing or waiving
         of all such Events of Default with respect to such series which may
         have occurred:

                          (i)    the duties and obligations of the Trustee with
                  respect to the Securities of any series shall be determined
                  solely by the express provisions of this Indenture, and the
                  Trustee shall not be liable except for the performance of such
                  duties and obligations as are specifically set forth in this
                  Indenture, and no implied covenants or obligations shall be
                  read into this Indenture against the Trustee; and

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

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

                  (c)     the Trustee shall not be liable with respect to any
         action taken or omitted to be taken by it in good faith in accordance
         with the direction of the Holders pursuant to Article Five relating to
         the time, method and place of conducting any proceeding for any remedy
         available to the Trustee, or exercising any trust or power conferred
         upon the Trustee, under this Indenture.

         None of the provisions contained in this Indenture shall require the
Trustee to expend or risk its own funds or otherwise incur personal financial
liability in the performance of any of its duties or in the exercise of any of
its rights or powers, if there shall be reasonable ground for believing that the
repayment of such funds or adequate indemnity against such liability is not
reasonably assured to it.

         SECTION 6.2    Certain Rights of the Trustee. Subject to Section 6.1:

         (a)      the Trustee may rely and shall be protected in acting or
refraining from acting upon any resolution, Officers' Certificate or any other
certificate, statement, instrument, opinion, report, notice, request, consent,
order, bond, debenture, note, coupon, security or other paper or document
believed by it to be genuine and to have been signed or presented by the proper
party or parties;

                                      -30-
<PAGE>   38

         (b)      any request, direction, order or demand of the Issuer
mentioned herein shall be sufficiently evidenced by an Officers' Certificate or
Issuer Order (unless other evidence in respect thereof be herein specifically
prescribed); and any resolution of the Board of Directors may be evidenced to
the Trustee by a Board Resolution;

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

         (d)      the Trustee shall be under no obligation to exercise any of
the trusts or powers vested in it by this Indenture at the request, order or
direction of any of the Securityholders pursuant to the provisions of this
Indenture, including, without limitation, pursuant to Article Five unless such
Securityholders shall have offered to the Trustee reasonable security or
indemnity against the costs, expenses and liabilities which might be incurred
therein or thereby;

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

         (f)      prior to the occurrence of an Event of Default hereunder and
after the curing or waiving of all Events of Default, 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, consent, order, approval, appraisal, bond, debenture, note, coupon,
security, or other paper or document unless requested in writing so to do by the
Holders of not less than a majority in aggregate principal amount of the
Securities of all series affected then Outstanding; provided that, if the
payment within a reasonable time to the Trustee of the costs, expenses or
liabilities likely to be incurred by it in the making of such investigation is,
in the opinion of the Trustee, not reasonably assured to the Trustee by the
security afforded to it by the terms of this Indenture, the Trustee may require
reasonable indemnity against such expenses or liabilities as a condition to
proceeding; the reasonable expenses of every such investigation shall be paid by
the Issuer or, if paid by the Trustee or any predecessor Trustee, shall be
repaid by the Issuer upon demand;

         (g)      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 not regularly in its employ and the Trustee shall not be responsible
for any misconduct or negligence on the part of any such agent or attorney
appointed with due care by it hereunder; and

         (h)      the Trustee shall not be charged with knowledge of any Default
or Event of Default with respect to a series of Securities unless either (i) a
Responsible Officer of the Trustee assigned to the Corporate Trust Office of the
Trustee (or any successor division or department of the Trustee) shall have
actual knowledge of such Default or Event of Default or (ii) written notice of
such Default or Event of Default shall have been given to the Trustee by the
Issuer or any other obligor on such series of Securities or by any Holder of
Securities of such series.

                                      -31-
<PAGE>   39

         SECTION 6.3    Trustee Not Responsible for Recitals, Disposition of
Securities or Application of Proceeds Thereof. The recitals contained herein and
in the Securities, except the Trustee's certificates of authentication, shall be
taken as the statements of the Issuer, and the Trustee assumes no responsibility
for the correctness of the same. The Trustee makes no representation as to the
validity or sufficiency of this Indenture, of the Securities or of any
prospectus used to sell the Securities. The Trustee shall not be accountable for
the use or application by the Issuer of any of the Securities or of the proceeds
thereof.

         SECTION 6.4    Trustee and Agents May Hold Securities; Collections,
etc. The Trustee or any agent of the Issuer or the Trustee, in its individual or
any other capacity, may become the owner or pledgee of Securities with the same
rights it would have if it were not the Trustee or such agent and, subject to
Sections 6.8 and 6.13, may otherwise deal with the Issuer and receive, collect,
hold and retain collections from the Issuer with the same rights it would have
if it were not the Trustee or such agent.

         SECTION 6.5    Moneys Held by Trustee. Subject to the provisions of
Section 10.4 hereof, all moneys received by the Trustee shall, until used or
applied as herein provided, be held in trust for the purposes for which they
were received, but need not be segregated from other funds except to the extent
required by mandatory provisions of law. Neither the Trustee nor any agent of
the Issuer or the Trustee shall be under any liability for interest on any
moneys received by it hereunder.

         SECTION 6.6    Compensation and Indemnification of Trustee and Its
Prior Claim. The Issuer covenants and agrees to pay to the Trustee from time to
time, and the Trustee shall be entitled to, such compensation as shall be agreed
to in writing between the Issuer and the Trustee (which shall not be limited by
any provision of law in regard to the compensation of a trustee of an express
trust) and the Issuer covenants and agrees to pay or reimburse the Trustee and
each predecessor Trustee upon its request for all reasonable expenses,
disbursements and advances incurred or made by or on behalf of it in accordance
with any of the provisions of this Indenture (including the reasonable
compensation and the expenses and disbursements of its counsel and of all agents
and other persons not regularly in its employ) except any such expense,
disbursement or advance as may arise from its negligence or bad faith. The
Issuer also covenants to indemnify the Trustee and each predecessor Trustee for,
and to hold it harmless against, any and all loss, liability, damage, claim or
expense, including taxes (other than taxes based on the income of the Trustee),
incurred without negligence or bad faith on its part, arising out of or in
connection with the acceptance or administration of this Indenture or the trusts
hereunder and its duties hereunder, including the costs and expenses of
defending itself against or investigating any claim or liability in the
premises. The obligations of the Issuer under this Section 6.6 to compensate and
indemnify the Trustee and each predecessor Trustee and to pay or reimburse the
Trustee and each predecessor Trustee for expenses, disbursements and advances
shall constitute additional indebtedness hereunder and shall survive the
satisfaction and discharge of this Indenture or the resignation or removal of
the Trustee and shall not be subordinate to the payment of Senior Indebtedness
pursuant to Article Thirteen. Such additional indebtedness shall be a senior
claim to that of the Securities upon all property and funds held or collected by
the Trustee as such, except funds held in trust for the benefit of the Holders
of particular Securities, and the Securities are hereby subordinated to such
senior claim. When the Trustee incurs expenses or renders services in connection
with an Event of Default specified in Section 5.1(d) or (e) or in

                                      -32-
<PAGE>   40

connection with Article Five hereof, the expenses (including the reasonable fees
and expenses of its counsel) and the compensation for the service in connection
therewith are intended to constitute expenses of administration under any
bankruptcy law without any need to demonstrate substantial contribution under
any bankruptcy law. The provisions of this Section 6.6 shall survive the
resignation or removal of the Trustee and the termination of this Indenture.

         SECTION 6.7    Right of Trustee to Rely on Officers' Certificate, etc.
Subject to Sections 6.1 and 6.2, whenever in the administration of the trusts of
this Indenture the Trustee shall deem it necessary or desirable that a matter be
proved or established prior to taking or suffering or omitting any action
hereunder, such matter (unless other evidence in respect thereof be herein
specifically prescribed) may, in the absence of negligence or bad faith on the
part of the Trustee, be deemed to be conclusively proved and established by an
Officers' Certificate delivered to the Trustee, and such certificate, in the
absence of negligence or bad faith on the part of the Trustee, shall be full
warrant to the Trustee for any action taken, suffered or omitted by it under the
provisions of this Indenture upon the faith thereof.

         SECTION 6.8    Qualification of Trustee; Conflicting Interests. This
Indenture shall always have a Trustee who satisfies the requirements of Section
310(a)(1) of the Trust Indenture Act of 1939. The Trustee shall have a combined
capital and surplus of at least $25,000,000 as set forth in its most recent
published annual report of condition. The Trustee shall comply with Section
310(b) of the Trust Indenture Act of 1939 regarding disqualification of a
trustee upon acquiring a conflicting interest.

         SECTION 6.9    Persons Eligible for Appointment as Trustee; Different
Trustees for Different Series. The Trustee for each series of Securities
hereunder shall at all times be a corporation organized and doing business under
the laws of the United States of America or of any state or the District of
Columbia having a combined capital and surplus of at least $25,000,000, and
which is authorized under such laws to exercise corporate trust powers and is
subject to supervision or examination by federal, state or District of Columbia
authority, or a corporation or other Person permitted to act as trustee by the
Commission. If such corporation publishes reports of condition at least
annually, pursuant to law or to the requirements of the aforesaid supervising or
examining authority, then for the purposes of this Section, the combined capital
and surplus of such corporation shall be deemed to be its combined capital and
surplus as set forth in its most recent report of condition so published. No
obligor upon the Securities or any Affiliate of such obligor shall serve as
trustee upon the Securities. In case at any time the Trustee shall cease to be
eligible in accordance with the provisions of this Section 6.9, the Trustee
shall resign immediately in the manner and with the effect specified in Section
6.10.

         A different Trustee may be appointed by the Issuer for any series of
Securities prior to the issuance of such Securities. If the initial Trustee for
any series of Securities is to be a trustee other than The Bank of New York, the
Issuer and such Trustee shall, prior to the issuance of such Securities, execute
and deliver an indenture supplemental hereto, which shall provide for the
appointment of such Trustee as Trustee for the Securities of such series and
shall add to or change any of the provisions of this Indenture as shall be
necessary to provide for or facilitate the administration of the trusts
hereunder by more than one Trustee, it being understood that nothing herein or
in such supplemental indenture shall constitute such Trustees co-trustees of the
same

                                      -33-
<PAGE>   41

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.

         SECTION 6.10   Resignation and Removal; Appointment of Successor
Trustee. (a) The Trustee, or any trustee or trustees hereafter appointed, may at
any time resign with respect to one or more or all series of Securities by
giving written notice of resignation to the Issuer. Upon receiving such notice
of resignation, the Issuer shall promptly appoint a successor trustee or
trustees with respect to the applicable series by written instrument in
duplicate, executed by authority of the Board of Directors, one copy of which
instrument shall be delivered to the resigning trustee and one copy to the
successor trustee or trustees. If no successor trustee shall have been so
appointed with respect to any series and have accepted appointment within 30
days after the mailing of such notice of resignation, the resigning trustee may
petition any court of competent jurisdiction for the appointment of a successor
trustee, or any Securityholder who has been a bona fide Holder of a Security or
Securities of the applicable series for at least six months may, subject to the
provisions of Article Five, on behalf of himself and all others similarly
situated, petition any such court for the appointment of a successor trustee.
Such court may thereupon, after such notice, if any, as it may deem proper and
prescribe, appoint a successor trustee.

         (b)      In case at any time any of the following shall occur:

               (i)      the Trustee shall fail to comply with the provisions of
         Section 6.8 with respect to any series of Securities after written
         request therefor by the Issuer or by any Securityholder who has been a
         bona fide Holder of a Security or Securities of such series for at
         least six months; or

               (ii)     the Trustee shall cease to be eligible in accordance
         with the provisions of Section 6.9 and shall fail to resign after
         written request therefor by the Issuer or by any such Securityholder;
         or

               (iii)    the Trustee shall become incapable of acting with
         respect to any series of Securities, or shall be adjudged a bankrupt or
         insolvent, or a receiver or liquidator 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, the Issuer may remove the Trustee with respect to the
applicable series of Securities and appoint a successor trustee for such series
by written instrument, in duplicate, executed by order of the Board of Directors
one copy of which instrument shall be delivered to the Trustee so removed and
one copy to the successor trustee, or, subject to the provisions of Article
Five, any Securityholder who has been a bona fide Holder of a Security or
Securities 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 removal of the Trustee and the appointment of a successor trustee with
respect to such series. Such court may thereupon, after such notice, if any, as
it may deem proper and prescribe, remove the Trustee and appoint a successor
trustee.

                                      -34-
<PAGE>   42

         (c)      The Holders of a majority in aggregate principal amount of the
Securities of each series then Outstanding may at any time remove the Trustee
with respect to Securities of such series and appoint a successor trustee with
respect to the Securities of such series by delivering to the Trustee so
removed, to the successor trustee so appointed and to the Issuer the evidence
provided for in Section 7.1 of the action in that regard taken by the
Securityholders. If no successor trustee shall have been so appointed with
respect to any series and have accepted appointment within 30 days after the
delivery of such evidence of removal, the Trustee may petition any court of
competent jurisdiction for the appointment of a successor trustee, or any
Securityholder who has been a bona fide Holder of a Security or Securities of
the applicable series for at least six months may, subject to the provisions of
Section 5.9, on behalf of himself and all others similarly situated, petition
any such court for the appointment of a successor trustee. Such court may
thereupon, after such notice, if any, as it may deem proper and prescribe,
appoint a successor trustee.

         (d)      Any resignation or removal of the Trustee with respect to any
series and any appointment of a successor trustee with respect to such series
pursuant to any of the provisions of this Section 6.10 shall become effective
upon acceptance of appointment by the successor trustee as provided in Section
6.11.

         SECTION 6.11   Acceptance of Appointment by Successor Trustee. Any
successor trustee appointed as provided in Section 6.10 shall execute and
deliver to the Issuer and to its predecessor trustee an instrument accepting
such appointment hereunder, and thereupon the resignation or removal of the
predecessor trustee with respect to all or any applicable series shall become
effective and such successor trustee, without any further act, deed or
conveyance, shall become vested with all rights, powers, duties and obligations
with respect to such series of its predecessor hereunder, with like effect as if
originally named as trustee for such series hereunder; but, nevertheless, on the
written request of the Issuer or of the successor trustee, upon payment of its
charges then unpaid, the trustee ceasing to act shall, subject to Section 10.4,
pay over to the successor trustee all moneys at the time held by it hereunder
and shall execute and deliver an instrument transferring to such successor
trustee all such rights, powers, duties and obligations. Upon request of any
such successor trustee, the Issuer shall execute any and all instruments in
writing for more fully and certainly vesting in and confirming to such successor
trustee all such rights, powers, duties and obligations. Any trustee ceasing to
act shall nevertheless, retain a prior claim upon all property or funds held or
collected by such trustee to secure any amounts then due it pursuant to the
provisions of Section 6.6.

         If a successor trustee is appointed with respect to the Securities of
one or more (but not all) series, the Issuer, the predecessor Trustee and each
successor trustee with respect to the Securities of any applicable series shall
execute and deliver an indenture supplemental hereto which shall contain such
provisions as shall be deemed necessary or desirable to confirm that all the
rights, powers, trusts and duties of the predecessor Trustee with respect to the
Securities of any series as to which the predecessor Trustee is not retiring
shall continue to be vested in the predecessor Trustee, and shall add to or
change any of the provisions of this Indenture as shall be necessary to provide
for or facilitate the administration of the trusts hereunder by more than one
trustee, it being understood that nothing herein or in such supplemental
indenture shall constitute such trustees co-trustees of the same trust and that
each such trustee shall be trustee of a trust or trusts under separate
indentures.

                                      -35-
<PAGE>   43

         No successor trustee with respect to any series of Securities shall
accept appointment as provided in this Section 6.11 unless at the time of such
acceptance such successor trustee shall be qualified under the provisions of
Section 6.8 and eligible under the provisions of Section 6.9.

         Upon acceptance of appointment by any successor trustee as provided in
this Section 6.11, the Issuer shall give notice thereof to the Holders of
Securities of each series affected, by mailing such notice to such Holders at
their addresses as they shall appear on the registry books. If the Issuer fails
to give such notice within ten days after acceptance of appointment by the
successor trustee, the successor trustee shall cause such notice to be given at
the expense of the Issuer.

         SECTION 6.12   Merger, Conversion, Consolidation or Succession to
Business of Trustee. Any corporation into which the Trustee may be merged or
converted or with which it may be consolidated, or any corporation resulting
from any merger, conversion or consolidation to which the Trustee shall be a
party, or any corporation succeeding to all or substantially all of the
corporate trust business of the Trustee, shall be the successor of the Trustee
hereunder, provided that such corporation shall be qualified under the
provisions of Section 6.8 and eligible under the provisions of Section 6.9,
without the execution or filing of any paper or any further act on the part of
any of the parties hereto, anything herein to the contrary notwithstanding.

         In case at the time such successor to the Trustee shall succeed to the
trusts created by this Indenture any of the Securities of any series shall have
been authenticated but not delivered, any such successor to the Trustee may
adopt the certificate of authentication of any predecessor Trustee and deliver
such Securities so authenticated; and, in case at that time any of the
Securities of any series shall not have been authenticated, any successor to the
Trustee may authenticate such Securities either in the name of any predecessor
hereunder or in the name of the successor Trustee; and in all such cases such
certificate shall have the full force which it is granted anywhere in the
Securities of such series or in this Indenture; provided that the right to adopt
the certificate of authentication of any predecessor Trustee or to authenticate
Securities of any series in the name of any predecessor Trustee shall apply only
to its successor or successors by merger, conversion or consolidation.

         SECTION 6.13   Preferential Collection of Claims Against the Issuer.
The Trustee shall comply with Section 31l(a) of the Trust Indenture Act of 1939,
excluding any creditor relationship listed in Section 311(b) of the Trust
Indenture Act of 1939. A Trustee who has resigned or been removed shall be
subject to Section 311(a) of the Trust Indenture Act of 1939 to the extent
indicated therein.

         SECTION 6.14   Appointment of Authenticating Agent. As long as any
Securities of a series remain Outstanding, the Trustee may, by an instrument in
writing, appoint with the approval of the Issuer an authenticating agent (the
"Authenticating Agent") which shall be authorized to act on behalf of the
Trustee to authenticate Securities, including Securities issued upon exchange,
registration of transfer, partial redemption or pursuant to Section 2.9.
Securities of each such series authenticated by such Authenticating Agent shall
be entitled to the benefits of this Indenture and shall be valid and obligatory
for all purposes as if authenticated by the Trustee. Whenever reference is made
in this Indenture to the authentication and delivery of Securities of any series
by the Trustee or to the Trustee's Certificate of Authentication, such

                                      -36-
<PAGE>   44

reference shall be deemed to include authentication and delivery on behalf of
the Trustee by an Authenticating Agent for such series and a Certificate of
Authentication executed on behalf of the Trustee by such Authenticating Agent.
Such Authenticating Agent shall at all times be a corporation organized and
doing business under the laws of the United States of America or of any state or
the District of Columbia, authorized under such laws to exercise corporate trust
powers, having a combined capital and surplus of at least $25,000,000
(determined as provided in Section 6.9 with respect to the Trustee) and subject
to supervision or examination by federal or state authority.

         Any corporation into which any 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 any Authenticating Agent
shall be a party, or any corporation succeeding to the corporate agency business
of any Authenticating Agent, shall, subject to meeting the eligibility
requirements for an Authenticating Agent set forth above, continue to be the
Authenticating Agent with respect to all series of Securities for which it
served as Authenticating Agent without the execution or filing of any paper or
any further act on the part of the Trustee or such Authenticating Agent. Any
Authenticating Agent may at any time, and if it shall cease to be eligible
shall, resign by giving written notice of resignation to the Trustee and to the
Issuer. 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
Issuer.

         Upon receiving such a notice of resignation or upon such a termination,
or in case at any time any Authenticating Agent shall cease to be eligible in
accordance with the provisions of this Section 6.14 with respect to one or more
series of Securities, the Trustee may appoint a successor Authenticating Agent
which shall be acceptable to the Issuer and the Issuer shall provide notice of
such appointment to all Holders of Securities of such series in the manner and
to the extent provided in Section 11.4. Any successor Authenticating Agent upon
acceptance of its appointment hereunder shall become vested with all rights,
powers, duties and responsibilities of its predecessor hereunder, with like
effect as if originally named as Authenticating Agent. The Issuer agrees to pay
to the Authenticating Agent for such series from time to time reasonable
compensation. The Authenticating Agent for the Securities of any series shall
have no responsibility or liability for any action taken by it as such at the
direction of the Trustee.

         Sections 6.2, 6.3, 6.4 and 7.3 shall be applicable to any
Authenticating Agent.

                                 ARTICLE SEVEN
                         CONCERNING THE SECURITYHOLDERS

         SECTION 7.1    Evidence of Action Taken by Securityholders. Any
request, demand, authorization, direction, notice, consent, waiver or other
action provided by this Indenture to be given or taken by a specified percentage
in principal amount of the Securityholders of any or all series may be embodied
in and evidenced by one or more instruments of substantially similar tenor
signed by such specified percentage of Securityholders 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. Proof of execution of any instrument or of a writing
appointing any such agent shall be sufficient for any

                                      -37-
<PAGE>   45

purpose of this Indenture and (subject to Sections 6.1 and 6.2) conclusive in
favor of the Trustee and the Issuer, if made in the manner provided in this
Article Seven.

         SECTION 7.2      Proof of Execution of Instruments and of Holding of
Securities. Subject to Sections 6.1 and 6.2, the execution of any instrument by
a Securityholder or his agent or proxy may be proved in the following manner:

                  (a)   The fact and date of the execution by any Holder of any
         instrument may be proved by the certificate of any notary public or
         other officer of any jurisdiction authorized to take acknowledgments of
         deeds or administer oaths that the person executing such instruments
         acknowledged to him the execution thereof, or by an affidavit of a
         witness to such execution sworn to before any such notary or other such
         officer. Where such execution is by or on behalf of any legal entity
         other than an individual, such certificate or affidavit shall also
         constitute sufficient proof of the authority of the person executing
         the same.

                  (b)   The ownership of Securities shall be proved by the
         Security register or by a certificate of the Security registrar.

         SECTION 7.3      Holders to be Treated as Owners. The Issuer, the
Trustee and any agent of the Issuer or the Trustee may deem and treat the Person
in whose name any Security shall be registered upon the Security register for
such series as the absolute owner of such Security (whether or not such Security
shall be overdue and notwithstanding any notation of ownership or other writing
thereon) for the purpose of receiving payment of or on account of the principal
of and, subject to the provisions of this Indenture, interest, if any, on such
Security and for all other purposes; and neither the Issuer nor the Trustee nor
any agent of the Issuer or the Trustee shall be affected by any notice to the
contrary.

         SECTION 7.4      Securities Owned by Issuer Deemed Not Outstanding. In
determining whether the Holders of the requisite aggregate principal amount of
Outstanding Securities of any or all series have concurred in any direction,
consent or waiver under this Indenture, Securities which are owned by the Issuer
or any other obligor on the Securities with respect to which such determination
is being made or by any Affiliate of the Issuer or by any other obligor on the
Securities with respect to which such determination is being made shall be
disregarded and deemed not to be Outstanding for the purpose of any such
determination, except that for the purpose of determining whether the Trustee
shall be protected in relying on any such direction, consent or waiver only
Securities which a Responsible Officer of the Trustee knows are so owned shall
be so disregarded. Securities so owned which have been pledged in good faith may
be regarded as Outstanding if the pledgee establishes to the satisfaction of the
Trustee the pledgee's right so to act with respect to such Securities and that
the pledgee is not the Issuer or any other obligor upon the Securities or any
Affiliate of the Issuer or any other obligor on the Securities. In case of a
dispute as to such right, the advice of counsel shall be full protection in
respect of any decision made by the Trustee in accordance with such advice. Upon
request of the Trustee, the Issuer shall furnish to the Trustee promptly an
Officers' Certificate listing and identifying all Securities, if any, known by
the Issuer to be owned or held by or for the account of any of the
above-described Persons; and, subject to Sections 6.1 and 6.2, the Trustee shall
be entitled to accept such Officers' Certificate as conclusive evidence of the
facts therein set forth

                                      -38-
<PAGE>   46

and of the fact that all Securities not listed therein are Outstanding for the
purpose of any such determination.

         SECTION 7.5    Right of Revocation of Action Taken. At any time prior
to (but not after) the evidencing to the Trustee, as provided in Section 7.1, of
the taking of any action by the Holders of the percentage in aggregate principal
amount of the Securities of any or all series, as the case may be, specified in
this Indenture in connection with such action, any Holder of a Security the
serial number of which is shown by the evidence to be included among the serial
numbers of the Securities the Holders of which have consented to such action
may, by filing written notice at the Corporate Trust Office and upon proof of
holding as provided in this Article Seven, revoke such action so far as concerns
such Security; provided that such revocation shall not become effective until
three Business Days after such filing. Except as aforesaid, any such action
taken by the Holder of any Security shall be conclusive and binding upon such
Holder and upon all future Holders and owners of such Security and of any
Securities issued in exchange or substitution therefor or on registration of
transfer thereof, irrespective of whether or not any notation in regard thereto
is made upon any such Security. Any action taken by the Holders of the
percentage in aggregate principal amount of the Securities of any or all series,
as the case may be, specified in this Indenture in connection with such action
shall be conclusively binding upon the Issuer, the Trustee and the Holders of
all the Securities affected by such action.

         SECTION 7.6    Record Date for Consents and Waivers. The Issuer may,
but shall not be obligated to, establish a record date for the purpose of
determining the Persons entitled to (a) waive any past Event of Default with
respect to the Securities of such series in accordance with Section 5.7 of the
Indenture, (b) consent to any supplemental indenture in accordance with Section
8.2 of the Indenture or (c) waive compliance with any term, condition or
provision of any covenant hereunder. If a record date is fixed, the Holders on
such record date, or their duly designated proxies, and any such Persons, shall
be entitled to waive any such past default, consent to any such supplemental
indenture or waive compliance with any such term, condition or provision,
whether or not such Holder remains a Holder after such record date; provided,
however, that unless such waiver or consent is obtained from the Holders, or
duly designated proxies, of the requisite principal amount of Outstanding
Securities of such series prior to the date which is the 180th day after such
record date, any such waiver or consent previously given shall automatically
and, without further action by any Holder, be cancelled and of no further
effect.

                                 ARTICLE EIGHT
                             SUPPLEMENTAL INDENTURES

         SECTION 8.1    Supplemental Indentures Without Consent of
Securityholders. The Issuer, when authorized by a Board Resolution (which
resolution may provide general terms or parameters for such action and may
provide that the specific terms of such action may be determined in accordance
with or pursuant to an Issuer Order), and the Trustee may from time to time and
at any time enter into an indenture or indentures supplemental hereto (which
shall conform to the provisions of the Trust Indenture Act of 1939 as in force
at the date of the execution thereof) for one or more of the following purposes:

                                      -39-
<PAGE>   47

                  (a)     to convey, transfer, assign, mortgage or pledge to the
         Trustee as security for the Securities of one or more series any
         property or assets;

                  (b)     to evidence the succession of another Person to the
         Issuer, or successive successions, and the assumption by the successor
         Person of the covenants, agreements and obligations of the Issuer
         pursuant to Article Nine;

                  (c)     to add to the covenants of the Issuer such further
         covenants, restrictions, conditions or provisions as the Issuer and the
         Trustee shall consider to be for the protection of the Holders of all
         or any series of Securities (and if such covenants, restrictions,
         conditions or provisions are to be for the protection of less than all
         series of Securities, stating that the same are expressly being
         included solely for the protection of such series) and to make the
         occurrence, or the occurrence and continuance, of a Default in any such
         additional covenants, restrictions, conditions or provisions an Event
         of Default permitting the enforcement of all or any of the several
         remedies provided in this Indenture as herein set forth; provided,
         however, that in respect of any such additional covenant, restriction,
         condition or provision such supplemental indenture may provide for a
         particular period of grace after Default (which period may be shorter
         or longer than that allowed in the case of other Defaults) or may
         provide for an immediate enforcement upon such an Event of Default or
         may limit the remedies available to the Trustee upon such an Event of
         Default or may limit the right of the Holders of a majority in
         aggregate principal amount of the Securities of such series to waive
         such an Event of Default;

                  (d)     to cure any ambiguity or to correct or supplement any
         provision contained herein or in any supplemental indenture which may
         be defective or inconsistent with any other provision contained herein
         or in any supplemental indenture, or to make any other provisions as
         the Issuer may deem necessary or desirable; provided, however, that no
         such action shall materially adversely affect the interests of the
         Holders of the Securities;

                  (e)     to establish the form or terms of Securities of any
         series as permitted by Sections 2.1 and 2.3;

                  (f)     to provide for the issuance of Securities of any
         series in coupon form (including Securities registrable as to principal
         only) and to provide for exchangeability of such Securities for the
         Securities issued hereunder in fully registered form and to make all
         appropriate changes for such purpose;

                  (g)     to modify, eliminate or add to the provisions of this
         Indenture to such extent as shall be necessary to effect the
         qualification of this Indenture under the Trust Indenture Act of 1939,
         or under any similar federal statute hereafter enacted, and to add to
         this Indenture such other provisions as may be expressly permitted by
         the Trust Indenture Act of 1939, excluding, however, the provisions
         referred to in Section 316(a)(2) of the Trust Indenture Act of 1939 as
         in effect at the date as of which this instrument was executed or any
         corresponding provision provided for in any similar federal statute
         hereafter enacted;

                                      -40-
<PAGE>   48

                  (h)     to evidence and provide for the acceptance of
         appointment hereunder of a Trustee other than The Bank of New York as
         Trustee for a series of Securities 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 6.9 hereof;

                  (i)     subject to Section 8.2 hereof, to add to or modify the
         provisions hereof as may be necessary or desirable to provide for the
         denomination of Securities in foreign currencies which shall not
         adversely affect the interests of the Holders of the Securities in any
         material respect;

                  (j)     to modify the covenants or Events of Default of the
         Issuer solely in respect of, or add new covenants or Events of Default
         of the Issuer that apply solely to, Securities not Outstanding on the
         date of such supplemental indenture; and

                  (k)     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 6.11.

         The Trustee is hereby authorized to join with the Issuer in the
execution of any such supplemental indenture, to make any further appropriate
agreements and stipulations which may be therein contained and to accept the
conveyance, transfer, assignment, mortgage or pledge of any property thereunder,
but the Trustee shall not be obligated to enter into any such supplemental
indenture which affects the Trustee's own rights, duties or immunities under
this Indenture or otherwise.

         Any supplemental indenture authorized by the provisions of this Section
may be executed without the consent of the Holders of any of the Securities then
Outstanding, notwithstanding any of the provisions of Section 8.2.

         SECTION 8.2      Supplemental Indentures with Consent of
Securityholders. With the consent (evidenced as provided in Article Seven) of
the Holders of not less than a majority in aggregate principal amount of the
Securities then Outstanding of any series affected by such supplemental
indenture, the Issuer, when authorized by a Board Resolution (which resolution
may provide general terms or parameters for such action and may provide that the
specific terms of such action may be determined in accordance with or pursuant
to an Issuer Order), and the Trustee may, from time to time and at any time,
enter into an indenture or indentures supplemental hereto (which shall conform
to the provisions of the Trust Indenture Act of 1939 as in force at the date of
execution thereof) for the purpose of adding any provisions to or changing in
any manner or eliminating any of the provisions of this Indenture or of any
supplemental indenture or of modifying in any manner the rights of the Holders
of the Securities of such series; provided that no such supplemental indenture
shall (a) extend the stated final maturity of the principal of any Security, or
reduce the principal amount thereof, or reduce the rate or extend the time of
payment of interest, if any, thereon (or, in the case of an Original Issue
Discount Security, reduce the rate of accretion of original issue discount
thereon), or reduce or alter the

                                      -41-
<PAGE>   49

method of computation of any amount payable on redemption, repayment or purchase
by the Issuer thereof (or the time at which any such redemption, repayment or
purchase may be made), or make the principal thereof (including any amount in
respect of original issue discount), or interest, if any, thereon payable in any
coin or currency other than that provided in the Securities or in accordance
with the terms of the Securities, or reduce the amount of the principal of an
Original Issue Discount Security that would be due and payable upon an
acceleration of the maturity thereof or the amount thereof provable in
bankruptcy in each case pursuant to Section Article Five, or impair or affect
the right of any Securityholder to institute suit for the payment thereof or, if
the Securities provide therefor, any right of repayment or purchase at the
option of the Securityholder, in each case without the consent of the Holder of
each Security so affected, or (b) reduce the aforesaid percentage of Securities
of any series, the consent of the Holders of which is required for any such
supplemental indenture, without the consent of the Holders of each Security so
affected. No consent of any Holder of any Security shall be necessary under this
Section 8.2 to permit the Trustee and the Issuer to execute supplemental
indentures pursuant to Sections 8.1 and 9.2.

         A supplemental indenture which changes or eliminates any covenant,
Event of Default or other provision of this Indenture which has expressly been
included solely for the benefit of one or more particular series of Securities,
or which modifies the rights of Holders of Securities of such series, with
respect to such covenant or provision, shall be deemed not to affect the rights
under this Indenture of the Holders of Securities of any other series.

         Upon the request of the Issuer, accompanied by a copy of a resolution
of the Board of Directors (which resolution may provide general terms or
parameters for such action and may provide that the specific terms of such
action may be determined in accordance with or pursuant to an Issuer Order)
certified by the secretary or an assistant secretary of the Issuer authorizing
the execution of any such supplemental indenture, and upon the filing with the
Trustee of evidence of the consent of the Holders of the Securities as aforesaid
and other documents, if any, required by Section 7.1, the Trustee shall join
with the Issuer in the execution of such supplemental indenture unless such
supplemental indenture affects the Trustee's own rights, duties or immunities
under this Indenture or otherwise, in which case the Trustee may at its
discretion, but shall not be obligated to, enter into such supplemental
indenture.

         It shall not be necessary for the consent of the Securityholders under
this Section 8.2 to approve the particular form of any proposed supplemental
indenture, but it shall be sufficient if such consent shall approve the
substance thereof.

         Promptly after the execution by the Issuer and the Trustee of any
supplemental indenture pursuant to the provisions of this Section 8.2, the
Issuer (or the Trustee at the request and expense of the Issuer) shall give
notice thereof to the Holders of then Outstanding Securities of each series
affected thereby, as provided in Section 11.4. Any failure of the Issuer to give
such notice, or any defect therein, shall not, however, in any way impair or
affect the validity of any such supplemental indenture.

         SECTION 8.3      Effect of Supplemental Indenture. Upon the execution
of any supplemental indenture pursuant to the provisions hereof, this Indenture
shall be and shall be deemed to be modified and amended in accordance therewith
and the respective rights,

                                      -42-
<PAGE>   50

limitations of rights, obligations, duties and immunities under this Indenture
of the Trustee, the Issuer and the Holders of Securities of each series affected
thereby shall thereafter be determined, exercised and enforced hereunder subject
in all respects to such modifications and amendments, and all the terms and
conditions of any such supplemental indenture shall be and shall be deemed to be
part of the terms and conditions of this Indenture for any and all purposes.

         SECTION 8.4      Documents to Be Given to Trustee. The Trustee, subject
to the provisions of Sections 6.1 and 6.2, shall be entitled to receive an
Officers' Certificate and an Opinion of Counsel as conclusive evidence that any
supplemental indenture executed pursuant to this Article Eight complies with the
applicable provisions of this Indenture and that all conditions precedent to the
execution and delivery of such supplemental indenture have been satisfied.

         SECTION 8.5      Notation on Securities in Respect of Supplemental
Indentures. Securities of any series authenticated and delivered after the
execution of any supplemental indenture pursuant to the provisions of this
Article Eight may bear a notation in form approved by the Trustee for such
series as to any matter provided for by such supplemental indenture or as to any
action taken by Securityholders. If the Issuer or the Trustee shall so
determine, new Securities of any series so modified as to conform, in the
opinion of the Trustee and the Issuer, to any modification of this Indenture
contained in any such supplemental indenture may be prepared by the Issuer,
authenticated by the Trustee and delivered in exchange for the Securities of
such series then Outstanding.

                                  ARTICLE NINE
                                   SUCCESSORS

         SECTION 9.1      When Issuer May Merge, etc. The Issuer may not
consolidate or merge with any other Person or sell, convey, assign, transfer,
lease or otherwise dispose of all or substantially all its properties and assets
as an entirety in one transaction or a series of transactions to any Person,
unless:

                  (a)   either (i) the Issuer shall be the continuing
         corporation or (ii) such Person shall be a corporation, partnership,
         limited liability company or trust organized and validly existing under
         the laws of the United States or any state thereof or the District of
         Columbia, and shall expressly assume by a supplemental indenture all
         the Issuer's obligations under the Securities and this Indenture; and

                  (b)   immediately before and after such transaction or each
         element of such series of transactions, no Default or Event of Default
         shall have occurred and be continuing.

         The Issuer shall deliver to the Trustee prior to the consummation of
the proposed transaction an Officers' Certificate to the foregoing effect and an
Opinion of Counsel stating that the proposed transaction and such supplemental
indenture comply with this Indenture.

         SECTION 9.2      Successor Corporation Substituted. Upon any
consolidation or merger, or any sale, lease, conveyance or other disposition of
all or substantially all of the assets of the Issuer or any assignment of its
obligations under this Indenture or the Securities in accordance with Section
9.1, the successor corporation formed by such consolidation or into or

                                      -43-
<PAGE>   51

with which the Issuer is merged or to which such sale, lease, conveyance or
other disposition or assignment is made shall succeed to, and be substituted
for, and may exercise every right and power of, the Issuer under this Indenture
with the same effect as if such successor corporation had been named as the
Issuer herein; and, except in the case of a lease, the predecessor corporation
shall be relieved of all obligations and covenants under this Indenture and the
Securities.

                                  ARTICLE TEN
                    SATISFACTION AND DISCHARGE OF INDENTURE;
                      COVENANT DEFEASANCE; UNCLAIMED MONEYS

         SECTION 10.1     Satisfaction and Discharge of Indenture; Covenant
Defeasance.

         (A)      If at any time (a) the Issuer shall have paid or caused to be
paid the principal of, premium, if any, and interest, if any, on all the
Securities Outstanding (other than Securities which have been destroyed, lost or
stolen and which have been replaced or paid as provided in Section 2.9) as and
when the same shall have become due and payable, or (b) the Issuer shall have
delivered to the Trustee for cancellation all Securities theretofore
authenticated (other than Securities which have been destroyed, lost or stolen
and which have been replaced or paid as provided in Section 2.9); and if, in any
such case, the Issuer shall also pay or cause to be paid all other sums payable
hereunder by the Issuer (including all amounts, payable to the Trustee pursuant
to Section 6.6), then this Indenture shall cease to be of further effect, and
the Trustee, on demand of the Issuer accompanied by an Officers' Certificate and
an Opinion of Counsel, each stating that all conditions precedent relating to
the satisfaction and discharge contemplated by this provision have been complied
with, and at the cost and expense of the Issuer, shall execute proper
instruments acknowledging such satisfaction and discharging this Indenture. The
Issuer agrees to reimburse the Trustee for any costs or expenses thereafter
reasonably and properly incurred, and to compensate the Trustee for any services
thereafter reasonably and properly rendered, by the Trustee in connection with
this Indenture or the Securities.

         (B)      If at any time (a) the Issuer shall have paid or caused to be
paid the principal of, premium, if any, and interest, if any, on all the
Securities of any series Outstanding (other than Securities of such series which
have been destroyed, lost or stolen and which have been replaced or paid as
provided in Section 2.9) as and when the same shall have become due and payable,
or (b) the Issuer shall have delivered to the Trustee for cancellation all
Securities of any series theretofore authenticated (other than any Securities of
such series which have been destroyed, lost or stolen and which have been
replaced or paid as provided in Section 2.9), or (c) in the case of any series
of Securities with respect to which the exact amount described in clause (ii)
below can be determined at the time of making the deposit referred to in such
clause (ii), (i) all the Securities of such series not theretofore delivered to
the Trustee for cancellation shall have become due and payable, or by their
terms are to become due and payable within one year or are to be called for
redemption within one year under arrangements satisfactory to the Trustee for
the giving of notice of redemption, and (ii) the Issuer shall have irrevocably
deposited or caused to be deposited with the Trustee as funds in trust,
specifically pledged as security for, and dedicated solely to, the benefit of
the Holders of Securities of such series, cash in an amount (other than moneys
repaid by the Trustee or any paying agent to the Issuer in accordance with
Section 10.4) or non-callable, non-prepayable bonds, notes, bills or other
similar obligations issued or

                                      -44-
<PAGE>   52

guaranteed by the United States government or any agency thereof the full and
timely payment of which are backed by the full faith and credit of the United
States ("U.S. Government Obligations"), maturing as to principal and interest,
if any, at such times and in such amounts as will insure the availability of
cash, or a combination thereof, sufficient in the opinion of a nationally
recognized firm of independent public accountants expressed in a written
certification thereof delivered to the Trustee, to pay (1) the principal of,
premium, if any, and interest, if any, on all Securities of such series on each
date that such principal of, premium, if any, or interest, if any, is due and
payable, and (2) any mandatory sinking fund payments on the dates on which such
payments are due and payable in accordance with the terms of the Indenture and
the Securities of such series; then the Issuer shall be deemed to have paid and
discharged the entire indebtedness on all the Securities of such series on the
date of the deposit referred to in clause (ii) above and the provisions of this
Indenture with respect to the Securities of such series shall no longer be in
effect (except, in the case of clause (c) of this Section 10.1(B), as to (i)
rights of registration of transfer and exchange of Securities of such series,
(ii) rights of substitution of mutilated, defaced, destroyed, lost or stolen
Securities of such series, (iii) rights of Holders of Securities of such series
to receive payments of principal thereof and premium, if any, and interest, if
any, thereon upon the original stated due dates therefor (but not upon
acceleration), and remaining rights of the Holders of Securities of such series
to receive mandatory sinking fund payments thereon, if any, when due, (iv) the
rights, obligations, duties and immunities of the Trustee hereunder, (v) the
rights of the Holders of Securities of such series as beneficiaries hereof with
respect to the property so deposited with the Trustee payable to all or any of
them and (vi) the obligations of the Issuer under Section 3.2 with respect to
Securities of such series) and the Trustee, on demand of the Issuer accompanied
by an Officers' Certificate and an Opinion of Counsel, each stating that all
conditions precedent contemplated by this provision have been complied with, and
at the cost and expense of the Issuer, shall execute proper instruments
acknowledging the same.

         (C)      The following provisions shall apply to the Securities of each
series unless specifically otherwise provided in a Board Resolution, Officers'
Certificate or indenture supplemental hereto provided pursuant to Section 2.3.
In addition to discharge of the Indenture pursuant to the next preceding
paragraph, in the case of any series of Securities with respect to which the
exact amount described in subparagraph (a) below can be determined at the time
of making the deposit referred to in such subparagraph (a), the Issuer shall be
deemed to have paid and discharged the entire indebtedness on all the Securities
of such a series on the 91st day after the date of the deposit referred to in
subparagraph (a) below, and the provisions of this Indenture with respect to the
Securities of such series shall no longer be in effect (except as to (i) rights
of registration of transfer and exchange of Securities of such series, (ii)
substitution of mutilated, defaced, destroyed, lost or stolen Securities of such
series, (iii) rights of Holders of Securities of such series to receive payments
of principal thereof, premium, if any, and interest, if any, thereon upon the
original stated due dates therefor (but not upon acceleration), and remaining
rights of the Holders of Securities of such series to receive mandatory sinking
fund payments, if any, (iv) the rights, obligations, duties and immunities of
the Trustee hereunder, (v) the rights of the Holders of Securities of such
series as beneficiaries hereof with respect to the property so deposited with
the Trustee payable to all or any of them and (vi) the obligations of the Issuer
under Section 3.2 with respect to Securities of such series) and the Trustee, on
demand of the Issuer accompanied by an Officers' Certificate and an Opinion of
Counsel, each stating that all

                                      -45-
<PAGE>   53

conditions precedent contemplated by this provision have been complied with, and
at the cost and expense of the Issuer, shall execute proper instruments
acknowledging the same, if

                  (a)   with reference to this provision the Issuer has
         irrevocably deposited or caused to be irrevocably deposited with the
         Trustee as funds in trust, specifically pledged as security for, and
         dedicated solely to, the benefit of the Holders of Securities of such
         series (i) cash in an amount, or (ii) U.S. Government Obligations,
         maturing as to principal and interest, if any, at such times and in
         such amounts as will insure the availability of cash, or (iii) a
         combination thereof, sufficient, in the opinion of a nationally
         recognized firm of independent public accountants expressed in a
         written certification thereof delivered to the Trustee, to pay (A) the
         principal of, premium, if any, and interest, if any, on all Securities
         of such series on each date that such principal or interest, if any, is
         due and payable, and (B) any mandatory sinking fund payments on the
         dates on which such payments are due and payable in accordance with the
         terms of the Indenture and the Securities of such series;

                  (b)   such deposit will not result in a breach or violation
         of, or constitute a default under, any agreement or instrument to which
         the Issuer is a party or by which it is bound; and

                  (c)   the Issuer has delivered to the Trustee an Opinion of
         Counsel based on the fact that (x) the Issuer has received from, or
         there has been published by, the Internal Revenue Service a ruling or
         (y), since the date hereof, there has been a change in the applicable
         United States federal income tax law, in either case to the effect
         that, and such opinion shall confirm that, the Holders of the
         Securities of such series will not recognize income, gain or loss for
         Federal income tax purposes as a result of such deposit, defeasance and
         discharge and will be subject to Federal income tax on the same amount
         and in the same manner and at the same times, as would have been the
         case if such deposit, defeasance and discharge had not occurred.

         SECTION 10.2     Application by Trustee of Funds Deposited for Payment
of Securities. Subject to Section 10.4, all moneys and U.S. Government
Obligations deposited with the Trustee pursuant to Section 10.1 shall be held in
trust, and such moneys and all moneys from such U.S. Government Obligations
shall be applied by it to the payment, either directly or through any paying
agent (including the Issuer acting as its own paying agent), to the Holders of
the particular Securities of such series for the payment or redemption of which
such moneys and U.S. Government Obligations have been deposited with the
Trustee, of all sums due and to become due thereon for principal and interest,
if any, but such moneys and U.S. Government Obligations need not be segregated
from other funds except to the extent required by law.

         SECTION 10.3     Repayment of Moneys Held by Paying Agent. In
connection with the satisfaction and discharge of this Indenture with respect to
Securities of any series, all moneys then held by any paying agent under the
provisions of this Indenture with respect to such series of Securities shall,
upon demand of the Issuer, be repaid to it or paid to the Trustee and thereupon
such paying agent shall be released from all further liability with respect to
such moneys.

                                      -46-
<PAGE>   54

         SECTION 10.4     Return of Moneys Held by Trustee and Paying Agent
Unclaimed for Two Years. Any moneys deposited with or paid to the Trustee or any
paying agent for the payment of the principal of, premium, if any, or interest,
if any, on any Security of any series and not applied but remaining unclaimed
for two years after the date upon which such principal, premium, if any, or
interest, if any, shall have become due and payable, shall, upon the written
request of the Issuer and unless otherwise required by mandatory provisions of
applicable escheat or abandoned or unclaimed property law, be repaid to the
Issuer by the Trustee for such series or such paying agent, and the Holder of
the Securities of such series shall, unless otherwise required by mandatory
provisions of applicable escheat or abandoned or unclaimed property laws,
thereafter look only to the Issuer for any payment which such Holder may be
entitled to collect, and all liability of the Trustee or any paying agent with
respect to such moneys shall thereupon cease.

         SECTION 10.5     Indemnity for U.S. Government Obligations. The Issuer
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 10.1 or the principal or interest received in respect of such
obligations.

                                 ARTICLE ELEVEN
                            MISCELLANEOUS PROVISIONS

         SECTION 11.1     Partners, Incorporators, Stockholders, Officers and
Directors of Issuer Exempt from Individual Liability. No recourse under or upon
any obligation, covenant or agreement contained in this Indenture, or in any
Security, or because of any indebtedness evidenced thereby, shall be had against
any incorporator, as such or against any past, present or future stockholder,
officer or director, as such, of the Issuer, or any partner of the Issuer or of
any successor, either directly or through the Issuer or any successor, under any
rule of law, statute or constitutional provision or by the enforcement of any
assessment or by any legal or equitable proceeding or otherwise, all such
liability being expressly waived and released by the acceptance of the
Securities by the Holders thereof and as part of the consideration for the issue
of the Securities.

         SECTION 11.2     Provisions of Indenture for the Sole Benefit of
Parties and Holders of Securities. Nothing in this Indenture or in the
Securities, expressed or implied, shall give or be construed to give to any
Person, other than the parties hereto and their successors and the Holders of
the Senior indebtedness and the Holders of the Securities, any legal or
equitable right, remedy or claim under this Indenture or under any covenant or
provision herein contained, all such covenants and provisions being for the sole
benefit of the parties hereto and their successors and of the Holders of the
Securities.

         SECTION 11.3     Successors and Assigns of Issuer Bound by Indenture.
All the covenants, stipulations, promises and agreements in this Indenture
contained by or on behalf of the Issuer shall bind its successors and assigns,
whether so expressed or not.

         SECTION 11.4     Notices and Demands on Issuer, Trustee and Holders of
Securities. Any notice or demand which by any provision of this Indenture is
required or permitted to be given or served by the Trustee or by the Holders of
Securities to or on the Issuer, or as required

                                      -47-
<PAGE>   55

pursuant to the Trust Indenture Act of 1939, may be given or served by being
deposited postage prepaid, first-class mail (except as otherwise specifically
provided herein) addressed (until another address of the Issuer is filed by the
Issuer with the Trustee) to York International Corporation, 631 South Richland
Avenue, York, Pennsylvania 17403, Attention: Vice President, Secretary and
General Counsel. Any notice, direction, request or demand by the Issuer or any
Holder of Securities to or upon the Trustee shall be deemed to have been
sufficiently given or served by being deposited postage prepaid, first-class
mail (except as otherwise specifically provided herein) addressed (until another
address of the Trustee is filed by the Trustee with the Issuer) to The Bank of
New York, 101 Barclay Street, Floor 21 West, New York, New York 10286,
Attention: Corporate Trust Department.

         Where this Indenture provides for notice to Holders of Securities, such
notice shall be sufficiently given (unless otherwise herein expressly provided)
if in writing and mailed, first-class postage prepaid, to each Holder entitled
thereto, at his last address as it appears in the Security register. 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 or irregularities in regular
mail service, it shall be impracticable to mail notice to the Issuer when such
notice is required to be given pursuant to any provision of this Indenture, then
any manner of giving such notice as shall be reasonably satisfactory to the
Trustee shall be deemed to be sufficient notice.

         SECTION 11.5     Officers' Certificates and Opinions of Counsel;
Statements to Be Contained Therein. Upon any application or demand by the Issuer
to the Trustee to take any action under any of the provisions of this Indenture,
or as required pursuant to the Trust Indenture Act of 1939, the Issuer shall
furnish to the Trustee an Officers' Certificate stating that all conditions
precedent provided for in this Indenture relating to the proposed action have
been complied with and an Opinion of Counsel stating that in the opinion of such
counsel all such conditions precedent have been complied with, except that in
the case of any such application or demand as to which the furnishing of such
documents is specifically required by any provision of this Indenture relating
to such particular application or demand, no additional certificate or opinion
need be furnished.

         Each certificate or opinion provided for in this Indenture (other than
a certificate provided pursuant to Section 4.3(d)) and delivered to the Trustee
with respect to compliance with a condition or covenant provided for in this
Indenture shall include (a) a statement that the person making such certificate
or opinion has read such covenant or condition, (b) 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, (c) a statement
that, in the opinion of such person, he has made such examination or
investigation as is necessary to enable him to express an opinion as to whether
or not such covenant or condition has been complied with, and (d) a statement as
to whether or not, in the opinion of such person, such condition or covenant has
been complied with.

                                      -48-
<PAGE>   56

         Any certificate, statement or opinion of an officer of the Issuer may
be based, insofar as it relates to legal matters, upon a certificate or opinion
of or representations by counsel, unless such officer knows that the certificate
or opinion or representations with respect to the matters upon which his
certificate, statement or opinion may be based as aforesaid are erroneous, or in
the exercise of reasonable care should know that the same are erroneous. Any
certificate, statement or opinion of counsel may be based, insofar as it relates
to factual matters, on information with respect to which is in the possession of
the Issuer, upon the certificate, statement or opinion of or representations by
an officer or officers of the Issuer, unless such counsel knows that the
certificate, statement or opinion or representations with respect to the matters
upon which his certificate, statement or opinion may be based as aforesaid are
erroneous, or in the exercise of reasonable care should know that the same are
erroneous.

         Any certificate, statement or opinion of an officer of the Issuer or of
counsel may be based, insofar as it relates to accounting matters, upon a
certificate or opinion of or representations by an accountant or firm of
accountants in the employ of the Issuer, unless such officer or counsel, as the
case may be, knows that the certificate or opinion or representations with
respect to the accounting matters upon which his certificate, statement or
opinion may be based as aforesaid are erroneous, or in the exercise of
reasonable care should know that the same are erroneous.

         Any certificate or opinion of any independent firm of public
accountants filed with and directed to the Trustee shall contain a statement
that such firm is independent.

         SECTION 11.6     Payments Due on Saturdays, Sundays and Holidays. If
the date of maturity of principal of or interest, if any, on the Securities of
any series or the date fixed for redemption, purchase or repayment of any such
Security shall not be a Business Day, then payment of interest, if any, premium,
if any, or principal need not be made on such date, but may be made on the next
succeeding Business Day with the same force and effect as if made on the date of
maturity or the date fixed for redemption, purchase or repayment, and, in the
case of payment, no interest shall accrue for the period after such date.

         SECTION 11.7     Conflict of Any Provision of Indenture with Trust
Indenture Act of 1939. If and to the extent that any provision of this Indenture
limits, qualifies or conflicts with another provision included in this Indenture
which is required to be included herein by any of Sections 310 to 317,
inclusive, or is deemed applicable to this Indenture by virtue of the provisions
of the Trust Indenture Act of 1939, such required provision shall control.

         SECTION 11.8     GOVERNING LAW. THIS INDENTURE AND EACH SECURITY SHALL
BE DEEMED TO BE A CONTRACT UNDER THE LAWS OF THE STATE OF NEW YORK AND FOR ALL
PURPOSES SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF SUCH
STATE.

         SECTION 11.9     Counterparts. This Indenture may be executed in any
number of counterparts, each of which shall be an original; but such
counterparts shall together constitute but one and the same instrument.

                                      -49-
<PAGE>   57

         SECTION 11.10    Effect of Headings. The Article and Section headings
herein and the Table of Contents are for convenience only and shall not affect
the construction hereof.

                                 ARTICLE TWELVE
                   REDEMPTION OF SECURITIES AND SINKING FUNDS

         SECTION 12.1     Applicability of Article. The provisions of this
Article shall be applicable to the Securities of any series which are redeemable
before their maturity or are subject to any sinking fund for the retirement of
Securities of a series except as otherwise specified, as contemplated by Section
2.3 for Securities of such series.

         SECTION 12.2     Notice of Redemption; Partial Redemptions. Notice of
redemption to the Holders of Securities of any series to be redeemed as a whole
or in part at the option of the Issuer shall be given by mailing notice of such
redemption by first class mail, postage prepaid, at least 30 days and not more
than 60 days prior to the date fixed for redemption to such Holders of
Securities of such series at their last addresses as they shall appear in the
Security register. Any notice which is mailed in the manner herein provided
shall be conclusively presumed to have been duly given, whether or not the
Holder receives the notice. Failure to give notice by mail, or any defect in the
notice to the Holder of any Security of a series designated for redemption as a
whole or in part shall not affect the validity of the proceedings for the
redemption of any other Security of such series.

         The notice of redemption to each such Holder shall specify (i) the
principal amount of each Security of such series held by such Holder to be
redeemed, (ii) the date fixed for redemption, (iii) the redemption price, (iv)
the place or places of payment, (v) the CUSIP number relating to such
Securities, (vi) that payment will be made upon presentation and surrender of
such Securities, (vii) whether such redemption is pursuant to the mandatory or
optional sinking fund, or both, if such be the case, (viii) whether interest, if
any (or, in the case of Original Issue Discount Securities, original issue
discount), accrued to the date fixed for redemption will be paid as specified in
such notice and (ix) whether on and after said date interest, if any (or, in the
case of Original Issue Discount Securities, original issue discount), thereon or
on the portions thereof to be redeemed will cease to accrue. In case any
Security of a series is to be redeemed in part only, the notice of redemption
shall state the portion of the principal amount thereof to be redeemed and shall
state that on and after the date fixed for redemption, upon surrender of such
Security, a new Security or Securities of such series in principal amount equal
to the unredeemed portion thereof will be issued.

         The notice of redemption of Securities of any series to be redeemed at
the option of the Issuer shall be given by the Issuer or, at the Issuer's
request, by the Trustee in the name and at the expense of the Issuer.

         On or before the redemption date specified in the notice of redemption
given as provided in this Section 12.2, the Issuer will deposit with the Trustee
or with one or more paying agents an amount of money sufficient to redeem on the
redemption date all the Securities of such series so called for redemption at
the appropriate redemption price, together with accrued interest, if any, to the
date fixed for redemption. The Issuer will deliver to the Trustee at least 45
days prior to the date fixed for redemption (unless a shorter notice period
shall be satisfactory to the Trustee)

                                      -50-
<PAGE>   58

an Officers' Certificate stating the aggregate principal amount of Securities to
be redeemed. In case of a redemption at the election of the Issuer prior to the
expiration of any restriction on such redemption, the Issuer shall deliver to
the Trustee, prior to the giving of any notice of redemption to Holders pursuant
to this Section, an Officers' Certificate stating that such restriction has been
complied with.

         If less than all the Securities of a series are to be redeemed, the
Trustee shall select, in such manner as it shall deem appropriate and fair,
Securities of such series to be redeemed. Securities may be redeemed in part in
multiples equal to the minimum authorized denomination for Securities of such
series or any multiple thereof. The Trustee shall promptly notify the Issuer in
writing of the Securities of such series selected for redemption and, in the
case of any Securities of such series selected for partial redemption, the
principal amount thereof to be redeemed. For all purposes of this Indenture,
unless the context otherwise requires, all provisions relating to the redemption
of Securities of any series shall relate, in the case of any Security redeemed
or to be redeemed only in part, to the portion of the principal amount of such
Security which has been or is to be redeemed.

         SECTION 12.3     Payment of Securities Called for Redemption. If notice
of redemption has been given as provided by this Article Twelve, the Securities
or portions of Securities specified in such notice shall become due and payable
on the date and at the place or places stated in such notice at the applicable
redemption price, together with interest, if any accrued to the date fixed for
redemption, and on and after said date (unless the Issuer shall default in the
payment of such Securities at the redemption price, together with interest, if
any, accrued to said date) interest, if any (or, in the case of Original Issue
Discount Securities, original issue discount), on the Securities or portions of
Securities so called for redemption shall cease to accrue, and such Securities
shall cease from and after the date fixed for redemption (unless an earlier date
shall be specified in a Board Resolution, Officers' Certificate or executed
supplemental indenture referred to in Sections 2.1 and 2.3 by or pursuant to
which the form and terms of the Securities of such series were established)
except as provided in Sections 6.5 and 10.4, to be entitled to any benefit or
security under this Indenture, and the Holders thereof shall have no right in
respect of such Securities except the right to receive the redemption price
thereof and unpaid interest, if any, to the date fixed for redemption. On
presentation and surrender of such Securities at a place of payment specified in
said notice, said Securities or the specified portions thereof shall be paid and
redeemed by the Issuer at the applicable redemption price, together with
interest, if any, accrued thereon to the date fixed for redemption; provided
that payment of interest, if any, becoming due on or prior to the date fixed for
redemption shall be payable to the Holders of Securities registered as such on
the relevant record date subject to the terms and provisions of Sections 2.3 and
2.7 hereof.

         If any Security called for redemption shall not be so paid upon
surrender thereof for redemption, the redemption price shall, until paid or duly
provided for, bear interest from the date fixed for redemption at the rate of
interest or Yield to Maturity (in the case of an Original Issue Discount
Security) borne by such Security.

         Upon presentation of any Security redeemed in part only, the Issuer
shall execute and the Trustee shall authenticate and deliver to or on the order
of the Holder thereof, at the expense of the Issuer, a new Security or
Securities of such series, and of like tenor, of authorized

                                      -51-
<PAGE>   59

denominations, in principal amount equal to the unredeemed portion of the
Security so presented.

         SECTION 12.4     Exclusion of Certain Securities from Eligibility for
Selection for Redemption. Securities shall be excluded from eligibility for
selection for redemption if they are identified by registration and certificate
number in an Officers' Certificate delivered to the Trustee at least 45 days
prior to the last date on which notice of redemption may be given as being owned
of record and beneficially by, and not pledged or hypothecated by either (a) the
Issuer, or (b) a Person specifically identified in such written statement as an
Affiliate of the Issuer.

         SECTION 12.5     Mandatory and Optional Sinking Funds. The minimum
amount of any sinking fund payment provided for by the terms of the Securities
of any series is herein referred to as a "mandatory sinking fund payment," and
any payment in excess of such minimum amount provided for by the terms of the
Securities of any series is herein referred to as an "optional sinking fund
payment." The date on which a sinking fund payment is to be made is herein
referred to as the "sinking fund payment date."

         In lieu of making all or any part of any mandatory sinking fund payment
with respect to any series of Securities in cash, the Issuer may at its option
(a) deliver to the Trustee Securities of such series theretofore purchased or
otherwise acquired (except upon redemption pursuant to the mandatory sinking
fund) by the Issuer or receive credit for Securities of such series (not
previously so credited) theretofore purchased or otherwise acquired (except as
aforesaid) by the Issuer and delivered to the Trustee for cancellation pursuant
to Section 2.10, (b) receive credit for optional sinking fund payments (not
previously so credited) made pursuant to this Section 12.5, or (c) receive
credit for Securities of such series (not previously so credited) redeemed by
the Issuer through any optional redemption provision contained in the terms of
such series. Securities so delivered or credited shall be received or credited
by the Trustee at the sinking fund redemption price specified in such
Securities.

         On or before the 60th day next preceding each sinking fund payment date
for any series, the Issuer will deliver to the Trustee an Officers' Certificate
(a) specifying the portion of the mandatory sinking fund payment to be satisfied
by payment of cash and the portion to be satisfied by credit of Securities of
such series and the basis for such credit, (b) stating that none of the
Securities of such series to be so credited has theretofore been so credited,
(c) stating that no Defaults in the payment of interest or Events of Default
with respect to such series have occurred and are continuing, and (d) stating
whether or not the Issuer intends to exercise its right to make an optional
sinking fund payment with respect to such series and, if so, specifying the
amount of such optional sinking fund payment which the Issuer intends to pay on
or before the next succeeding sinking fund payment date. Any Securities of such
series to be credited and required to be delivered to the Trustee in order for
the Issuer to be entitled to credit therefor as aforesaid which have not
theretofore been delivered to the Trustee shall be delivered for cancellation
pursuant to Section 2.10 to the Trustee with such Officers' Certificate (or
reasonably promptly thereafter if acceptable to the Trustee). Such Officers'
Certificate shall be irrevocable and upon its receipt by the Trustee the Issuer
shall become unconditionally obligated to make all the cash payments or payments
therein referred to, if any, on or before the next succeeding sinking fund
payment date. Failure of the Issuer, on or before any such 60th day, to deliver
such

                                      -52-
<PAGE>   60

Officers' Certificate and Securities (subject to the parenthetical clause in the
second preceding sentence) specified in this paragraph, if any, shall not
constitute a Default but shall constitute, on and as of such date, the
irrevocable election of the Issuer (i) that the mandatory sinking fund payment
for such series due on the next succeeding sinking fund payment date shall be
paid entirely in cash without the option to deliver or credit Securities of such
series in respect thereof, and (ii) that the Issuer will make no optional
sinking fund payment with respect to such series as provided in this Section
12.5.

         If the sinking fund payment or payments (mandatory or optional or both)
to be made in cash on the next succeeding sinking fund payment date plus any
unused balance of any preceding sinking fund payments made in cash shall exceed
$50,000, or a lesser sum if the Issuer shall so request with respect to the
Securities of any particular series, such cash shall be applied on the next
succeeding sinking fund payment date to the redemption of Securities of such
series at the sinking fund redemption price together with accrued interest, if
any, to the date fixed for redemption. If such amount shall be $50,000 or less
and the Issuer makes no such request, then it shall be carried over until a sum
in excess of $50,000 is available. The Trustee shall select, in the manner
provided in Section 12.2, for redemption on such sinking fund payment date a
sufficient principal amount of Securities of such series to absorb said cash, as
nearly as may be, and shall (if requested in writing by the Issuer) inform the
Issuer of the serial numbers of the Securities of such series (or portions
thereof) so selected. The Issuer, or the Trustee, in the name and at the expense
of the Issuer (if the Issuer shall so request the Trustee in writing) shall
cause notice of redemption of the Securities of such series to be given in
substantially the manner provided in Section 12.2 (and with the effect provided
in Section 12.3) for the redemption of Securities of such series in part at the
option of the Issuer. The amount of any sinking fund payments not so applied or
allocated to the redemption of Securities of such series shall be added to the
next cash sinking fund payment for such series and, together with such payment,
shall be applied in accordance with the provisions of this Section 12.5. Any and
all sinking fund moneys held on the stated maturity date of the Securities of
any particular series (or earlier, if such maturity is accelerated), which are
not held for the payment or redemption of particular Securities of such series
shall be applied, together with other moneys, if necessary, sufficient for the
purpose, to the payment of the principal of, and interest, if any, on, the
Securities of such series at maturity.

         On or before each sinking fund payment date, the Issuer shall pay to
the Trustee in cash or shall otherwise provide for the payment of all interest,
if any, accrued to the date fixed for redemption on Securities to be redeemed on
such sinking fund payment date.

         The Trustee shall not redeem or cause to be redeemed any Securities of
a series with sinking fund moneys or give any notice of redemption of Securities
for such series by operation of the sinking fund during the continuance of a
Default in payment of interest on such Securities or of any Event of Default
with respect to such series except that, where the giving of notice of
redemption of any Securities shall theretofore have been made, the Trustee shall
redeem or cause to be redeemed such Securities, provided that it shall have
received from the Issuer a sum sufficient for such redemption. Except as
aforesaid, and subject to Article Thirteen, any moneys in the sinking fund for
such series at the time when any such Default or Event of Default known to a
Responsible Officer of the Trustee shall occur, and any moneys thereafter paid
into the sinking fund, shall, during the continuance of such Default or Event of
Default, be deemed to

                                      -53-
<PAGE>   61

have been collected under Article Five and held for the payment of all such
Securities. In case such Event of Default shall have been waived as provided in
Article Five or the Default cured on or before the 60th day preceding the
sinking fund payment date in any year, such moneys shall thereafter be applied
on the next succeeding sinking fund payment date in accordance with this Section
to the redemption of such Securities.

                                ARTICLE THIRTEEN
                                  SUBORDINATION

         SECTION 13.1     Securities Subordinated to Senior Indebtedness. (a)
The Issuer covenants and agrees, and each Holder of Securities of each series,
by his acceptance thereof, likewise covenants and agrees, that anything in this
Indenture or the Securities of any series to the contrary notwithstanding, the
indebtedness evidenced by the Securities of each series is subordinate and
junior in right of payment, to the extent provided herein, to all Senior
Indebtedness, whether outstanding on the date of execution of this Indenture or
thereafter created, incurred or assumed, and that the subordination is for the
benefit of the holders of Senior Indebtedness but the Securities shall in all
respects rank pari passu with all other Senior Subordinated Indebtedness of the
Issuer. The Securities shall rank senior to all existing and future indebtedness
of the Issuer that is neither Senior Indebtedness nor Senior Subordinated
Indebtedness and only indebtedness of the Issuer that is Senior Indebtedness
shall rank senior to the Securities in accordance with the provisions set forth
herein.

         (b)      Subject to Section 13.4, if (i) the Issuer shall Default in
the payment of any principal of, premium, if any, or interest, if any, on any
Senior Indebtedness when the same becomes due and payable, whether at maturity
or at a date fixed for prepayment or by declaration of acceleration or
otherwise, or (ii) any other Default shall occur with respect to Senior
Indebtedness and the maturity of such Senior Indebtedness has been accelerated
in accordance with its terms, then, upon written notice of such Default to the
Issuer and the Trustee by the holders of Senior Indebtedness or any trustee
therefor, unless and until, in either case, the Default has been cured or waived
or shall have otherwise ceased to exist, and any such acceleration has been
rescinded or such Senior Indebtedness has been paid in full, no direct or
indirect payment (in cash, property. securities, by set-off or otherwise) shall
be made or agreed to be made on account of the principal of, premium, if any, or
interest, if any, on any of the Securities, or in respect of any redemption,
retirement, purchase or other acquisition of any of the Securities other than
those made in capital stock of the Issuer (or cash in lieu of fractional shares
thereof).

         (c)      If any Default (other than a Default described in paragraph
(b) of this Section 13.1) shall occur under the Senior Indebtedness, pursuant to
which the maturity thereof may be accelerated immediately without further notice
(except such notice as may be required to effect such acceleration) or the
expiration of any applicable grace periods occurs (a "Senior Nonmonetary
Default"), then, upon the receipt by the Issuer and the Trustee of written
notice thereof (a "Payment Notice") from or on behalf of holders of such Senior
Indebtedness specifying an election to prohibit such payment and other action by
the Issuer in accordance with the following provisions of this paragraph (c),
the Issuer may not make any payment or take any other action that would be
prohibited by paragraph (b) of this Section 13.1 during the period (the "Payment
Blockage Period") commencing on the date of receipt of such Payment Notice and
ending on the earlier of (i) the date, if any, on which the holders of such
Senior Indebtedness or

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<PAGE>   62

their representative notify the Trustee that such Senior Nonmonetary Default is
cured or waived or ceases to exist or the Senior Indebtedness to which such
Senior Nonmonetary Default relates is discharged or (ii) the 179th day after the
date of receipt of such Payment Notice. Notwithstanding the provisions described
in the immediately preceding sentence, the Issuer may resume payments on the
Securities following such Payment Blockage Period. In no event will a Payment
Blockage Period extend beyond 179 days from the date of the receipt by the
Trustee and the Company of the notice initiating such Payment Blockage Period.
Any number of notices of a Senior Nonmonetary Default may be given during a
Payment Blockage Period; provided, that no such notice shall extend such Payment
Blockage Period, only one Payment Blockage Period may be commenced within any
360-day period and there shall be a period of at least 181 consecutive days in
each period of 360 consecutive days when no Payment Blockage Period is in
effect.

         (d)      If (i) (A) without the consent of the Issuer, a receiver,
conservator, liquidator or trustee of the Issuer or of any of its property is
appointed by the order or decree of any court or agency or supervisory authority
having jurisdiction, and such decree or order remains in effect for more than 60
days or (B) the Issuer is adjudicated bankrupt or insolvent or (C) any of its
property is sequestered by court order and such order remains in effect for more
than 60 days or (D) a petition is filed against the Issuer under any state or
federal bankruptcy, reorganization, arrangement, insolvency, readjustment of
Debt, dissolution, liquidation or receivership law of any jurisdiction whether
now or hereafter in effect (including without limitation the Bankruptcy Law),
and is not dismissed within 60 days after such filing; or (ii) the Issuer (A)
commences a voluntary case or other proceeding seeking liquidation,
reorganization, arrangement, insolvency, readjustment of Debt, dissolution,
liquidation or other relief with respect to itself or its Debt or other
liabilities under any bankruptcy, insolvency or other similar law now or
hereafter in effect (including without limitation the Bankruptcy Law) or seeking
the appointment of a trustee, receiver, liquidator, custodian or other similar
official of it or any substantial part of its property, or (B) consents to any
such relief or to the appointment of or taking possession by any such official
in an involuntary case or other proceeding commenced against it, or (C) fails
to, or cannot, pay its Debts generally as they become due or (D) takes any
corporate action to authorize or effect any of the foregoing; or (iii) any
Subsidiary of the Issuer takes, suffers or permits to exist any of the events or
conditions referred to in the foregoing clause (i) or (ii), then all Senior
Indebtedness (including any interest thereon accruing after the commencement of
any such proceedings) shall first be paid in full before any payment or
distribution, whether in cash, securities or other property, shall be made to
any Holder of any Securities on account thereof. Any payment or distribution,
whether in cash, securities or other property (other than securities of the
Issuer or any other corporation provided for by a plan of reorganization or
readjustment the payment of which is subordinate, at least to the extent
provided in these subordination provisions with respect to the indebtedness
evidenced by the Securities to the payment of all Senior Indebtedness then
outstanding and to any securities issued in respect thereof under any such plan
of reorganization or adjustment) which would otherwise (but for these
subordination provisions) be payable or deliverable in respect of the Securities
of any series shall be paid or delivered directly to the holders of Senior
Indebtedness in accordance with the priorities then existing among such holders
until all Senior Indebtedness (including any interest thereon accruing after the
commencement of any such proceedings) shall have been paid in full. In the event
of any such proceedings, after payment in full of all sums owing with respect to
Senior Indebtedness, the Holders of the Securities, together with the holders of
any obligations of the

                                      -55-
<PAGE>   63

Issuer ranking on a parity with the Securities, shall be entitled to be paid
from the remaining assets of the Issuer the amounts at the time due and owing on
account of unpaid principal of and interest, if any, on the Securities and such
other obligations before any payment or other distribution, whether in cash,
property or otherwise, shall be made on account of any capital stock or any
obligations of the Issuer ranking junior to the Securities and such other
obligations.

         (e)      If, notwithstanding the foregoing, any payment or distribution
of any character, whether in cash, securities or other property (other than
securities of the Issuer or any other corporation provided for by a plan of
reorganization or readjustment the payment of which is subordinate, at least to
the extent provided in the subordination provisions with respect to the
indebtedness evidenced by the Securities, to the payment of all Senior
Indebtedness then outstanding and to any securities issued in respect thereof
under any such plan of reorganization or readjustment), shall be received by the
Trustee or any Holder in contravention of any of the terms hereof, such payment
or distribution of securities shall be received in trust for the benefit of and
shall be paid over or delivered and transferred to the holders of the Senior
Indebtedness then outstanding in accordance with the priorities then existing
among such holders for application to the payment of all Senior Indebtedness
remaining unpaid, to the extent necessary to pay all such Senior Indebtedness in
full. In the event of the failure of the Trustee or any Holder to endorse or
assign any such payment, distribution or security, each holder of Senior
Indebtedness is hereby irrevocably authorized to endorse or assign the same.

         (f)      No present or future holder of any Senior Indebtedness shall
be prejudiced in the right to enforce subordination of the indebtedness
evidenced by the Securities by any act or failure to act on the part of the
Issuer or any Holder of Securities. Nothing contained herein shall impair, as
between the Issuer and the Holders of Securities of each series, the obligation
of the Issuer to pay to such Holders the principal of, premium, if any, and
interest, if any, on such Securities or prevent the Trustee or the Holder from
exercising all rights, powers and remedies otherwise permitted by applicable law
or hereunder upon a Default or Event of Default hereunder, all subject to the
rights of the holders of the Senior Indebtedness to receive cash, securities or
other property otherwise payable or deliverable to the Holders.

         (g)      Senior Indebtedness shall not be deemed to have been paid in
full unless the holders thereof shall have received cash, securities or other
property equal to the amount of such Senior Indebtedness then outstanding. Upon
the payment in full of all Senior Indebtedness, the Holders of Securities of
each series shall be subrogated to all rights of any holders of Senior
Indebtedness to receive any further payment or distributions applicable to the
Senior Indebtedness until the indebtedness evidenced by the Securities of such
series shall have been paid in full and such payments or distributions received
by such Holders, by reason of such subrogation, of cash, securities or other
property which otherwise would be paid or distributed to the holders of Senior
Indebtedness, shall, as between the Issuer and its creditors other than the
holders of Senior Indebtedness, on the one hand, and such Holders, on the other
hand, be deemed to be a payment by the Issuer on account of Senior Indebtedness,
and not on account of the Securities of such series.

         (h)      The provisions of this Section 13.1 shall not impair any
rights, interests, remedies or powers of any secured creditor of the Issuer in
respect of any security interest the creation of which is not prohibited by the
provisions of this Indenture.

                                      -56-
<PAGE>   64

         (i)      The securing of any obligations of the Issuer, otherwise
ranking on a parity with the Securities or ranking junior to the Securities,
shall not be deemed to prevent such obligations from constituting, respectively,
obligations ranking on a parity with the Securities or ranking junior to the
Securities.

         SECTION 13.2     Reliance on Certificate of Liquidating Agent; Further
Evidence as to Ownership of Senior Indebtedness. Upon any payment or
distribution of assets of the Issuer, the Trustee and the Holders shall be
entitled to rely upon an order or decree issued by any court of competent
jurisdiction in which such dissolution or winding up or liquidation or
reorganization or arrangement proceedings are pending or upon a certificate of
the bankruptcy trustee, receiver, assignee for the benefit of creditors or other
Person making such payment or distribution, delivered to the Trustee or to the
Holders, for the purpose of ascertaining the Persons entitled to participate in
such distribution, the holders of the Senior Indebtedness and other indebtedness
of the Issuer, the amount thereof or payable thereon, the amount or amounts paid
or distributed thereon and all other facts pertinent thereto or to this Article
Thirteen. In the absence of any such bankruptcy trustee, receiver, assignee or
other Person, the Trustee shall be entitled to rely upon written notice by a
Person representing himself to be a holder of Senior Indebtedness (or a trustee
or representative on behalf of such holder) as evidence that such Person is a
holder of Senior Indebtedness (or is such a trustee or representative). If the
Trustee determines, in good faith, that further evidence is required with
respect to the right of any Person as a holder of Senior Indebtedness to
participate in any payment or distributions pursuant to this Article Thirteen,
the Trustee may request such Person to furnish evidence to the reasonable
satisfaction of the Trustee as to the amount of Senior Indebtedness held by such
Person, as to the extent to which such Person is entitled to participate in such
payment or distribution, and to other facts pertinent to the rights of such
Person under this Article Thirteen, and if such evidence is not furnished, the
Trustee may defer any payment to such Person pending judicial determination as
to the right of such Person to receive such payment.

         SECTION 13.3     Payment Permitted If No Default. Nothing contained in
this Article Thirteen or elsewhere in this Indenture, or in any of the
Securities shall prevent (a) the Issuer at any time, except during the pendency
of any Default with respect to Senior Indebtedness described in Section 13.1(b)
or Section 13.1(c) or of any of the events described in Section 13.1(d), from
making payments of the principal of, premium, if any, or interest, if any, on
the Securities, or (b) the application by the Trustee or any paying agent of any
moneys deposited with it hereunder to payments of the principal of, premium, if
any, or interest, if any, on the Securities, if, at the time of such deposit,
the Trustee or such paying agent, as the case may be, did not have the written
notice provided for in Section 13.5 of any event prohibiting the making of such
deposit, or if, at the time of such deposit (whether or not in trust) by the
Issuer with the Trustee or paying agent (other than the Issuer) such payment
would not have been prohibited by the provisions of this Article Thirteen, and
the Trustee or any paying agent shall not be affected by any notice to the
contrary received by it on or after such date.

         SECTION 13.4     Disputes with Holders of Certain Senior Indebtedness.
Any failure by the Issuer to make any payment on or under any Senior
Indebtedness, other than any Senior Indebtedness as to which the provisions of
this Section 13.4 shall have been waived by the Issuer in the instrument or
instruments by which the Issuer incurred, assumed, guaranteed or otherwise
created such Senior Indebtedness, shall not be deemed a Default under Section
13.1 hereof if (i)

                                      -57-
<PAGE>   65

the Issuer shall be disputing its obligation to make such payment or perform
such obligation, and (ii) either (A) no final judgment relating to such dispute
shall have been issued against the Issuer which is in full force and effect and
is not subject to further review, including a judgment that has become final by
reason of the expiration of the time within which a party may seek further
appeal or review, or (B) if a judgment that is subject to further review or
appeal has been issued, the Issuer shall in good faith be prosecuting an appeal
or other proceeding for review, and a stay of execution shall have been obtained
pending such appeal or review.

         SECTION 13.5     Trustee Not Charged with Knowledge of Prohibition.
Anything in this Article Thirteen or elsewhere in this Indenture contained to
the contrary notwithstanding, the Trustee shall not at any time be charged with
knowledge of the existence of any facts which would prohibit the making of any
payment of moneys to or by the Trustee and shall be entitled to assume
conclusively that no such facts exist and that no event specified in clauses (b)
and (c) of Section 13.1 has happened unless and until the Trustee shall have
received an Officers' Certificate to that effect or notice in writing to that
effect signed by or on behalf of the holder or holders, or the representatives,
of Senior Indebtedness who shall have been certified by the Issuer or otherwise
established to the reasonable satisfaction of the Trustee to be such holder or
holders or representatives or from any trustee under any indenture pursuant to
which such Senior Indebtedness shall be outstanding; provided, however that, if
the Trustee shall not have received the Officers' Certificate or notice provided
for in this Section 13.5 at least three Business Days preceding the date upon
which by the terms hereof any moneys become payable for any purpose (including,
without limitation, the payment of either the principal of, premium, if any, or
interest, if any, on any Security), then, anything herein contained to the
contrary notwithstanding, the Trustee shall have full power and authority to
receive such moneys and apply the same to the purpose for which they were
received and shall not be affected by any notice to the contrary that may be
received by it within three Business Days preceding such date. The Issuer shall
give prompt written notice to the Trustee and to each paying agent of any facts
that would prohibit any payment of moneys to or by the Trustee or any paying
agent, and the Trustee shall not be charged with knowledge of the curing of any
default or the elimination of any other fact or condition preventing such
payment or distribution unless and until the Trustee shall have received an
Officers' Certificate to such effect.

         SECTION 13.6     Trustee to Effectuate Subordination. Each Holder of
Securities by his acceptance thereof authorizes and directs the Trustee on his
behalf to take such action as may be necessary or appropriate to effectuate the
subordination as between such Holder and holders of Senior Indebtedness as
provided in this Article Thirteen and appoints the Trustee its attorney-in-fact
for any and all such purposes.

         SECTION 13.7     Rights of Trustee as Holder of Senior Indebtedness.
The Trustee shall be entitled to all the rights set forth in this Article
Thirteen with respect to any Senior Indebtedness which may at the time be held
by it, to the same extent as any other holder of Senior Indebtedness and nothing
in this Indenture shall deprive the Trustee of any of its rights as such holder.
Nothing in this Article Thirteen shall apply to claims of, or payments to, the
Trustee under or pursuant to Section 6.6.

         SECTION 13.8     Article Applicable to Paying Agents. In case at any
time any paying agent other than the Trustee shall have been appointed by the
Issuer and be then acting

                                      -58-
<PAGE>   66

hereunder, the term "Trustee" as used in this Article Thirteen shall in such
case (unless the context shall otherwise require) be construed as extending to
and including such paying agent within its meaning as fully for all intents and
purposes as if the paying agent were named in this Article Thirteen in addition
to or in place of the Trustee; provided, however, that Sections 13.5 and 13.7
shall not apply to the Issuer if it acts as paying agent.

         SECTION 13.9     Subordination Rights Not Impaired by Acts or Omissions
of the Issuer or Holders of Senior Indebtedness. No right of any present or
future holders of any Senior Indebtedness to enforce subordination as herein
provided shall at any time in any way be prejudiced or impaired by any act or
failure to act on the part of the Issuer or by any act or failure to act, in
good faith, by any such holder, or by any noncompliance by the Issuer with the
terms, provisions and covenants of this Indenture, regardless of any knowledge
thereof which any such holder may have or be otherwise charged with. The holders
of Senior Indebtedness may, at any time or from time to time and in their
absolute discretion, change the manner, place or terms of payment, change or
extend the time of payment of, or renew or alter, any such Senior Indebtedness,
or amend or supplement any instrument pursuant to which any such Senior
Indebtedness is issued or by which it may be secured, or release any security
therefor or exercise or refrain from exercising any other of their rights under
such Senior Indebtedness, including, without limitation, the waiver of Default
thereunder, all without notice to or assent from the Holders of the Securities
or the Trustee and without affecting the obligations of the Issuer, the Trustee
or the Holders of Securities under this Article Thirteen.

         SECTION 13.10    Trustee Not Fiduciary for Holders of Senior
Indebtedness. The Trustee shall not be deemed to owe any fiduciary duty to the
holders of the Senior Indebtedness, and shall not be liable to any such holders
if it shall mistakenly pay over or distribute money or assets to Securityholders
or the Issuer. With respect to the holders of Senior Indebtedness, the Trustee
undertakes to perform or to observe only such of its covenants or obligations as
are specifically set forth in this Article Thirteen and no implied covenants or
obligations with respect to holders of Senior Indebtedness shall be read into
this Indenture against the Trustee.

         IN WITNESS WHEREOF, the parties hereto have caused this Indenture to be
duly executed as of _____________, _____ 200_.

                                              YORK INTERNATIONAL CORPORATION

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

Attest:

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

                                      -59-
<PAGE>   67

                                              THE BANK OF NEW YORK, as Trustee

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

                                      -60-

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