Document:

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                                                                     EXHIBIT 4.5

                               APACHE CORPORATION

                             2000 STOCK OPTION PLAN

                  (AS AMENDED AND RESTATED SEPTEMBER 14, 2000)

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                               APACHE CORPORATION

                             2000 STOCK OPTION PLAN

                                    SECTION 1

                                  INTRODUCTION

1.1 Establishment. Apache Corporation, a Delaware corporation (hereinafter
referred to, together with its Affiliated Corporations (as defined in Section
2.1 hereof) as the "Company" except where the context otherwise requires),
hereby establishes the Apache Corporation 2000 Stock Option Plan (the "Plan")
for Eligible Employees (as defined in Section 2.1 hereof). The Plan permits the
grant of stock options to Eligible Employees selected by the Committee (as
defined in Section 2.1 hereof).

1.2 Purposes. The purposes of the Plan are to provide the Eligible Employees
designated by the Committee for participation in the Plan with added incentives
to continue in the long-term service of the Company and to create in such
employees a more direct interest in the future success of the operations of the
Company by relating incentive compensation to increases in stockholder value, so
that the income of those employees is more closely aligned with the interests of
the Company's stockholders. The Plan is also designed to attract outstanding
individuals and to retain and motivate Eligible Employees by providing an
opportunity for investment in the Company.

1.3 Effective Date. The Effective Date of the Plan (the "Effective Date") shall
be February 10, 2000.

                                    SECTION 2

                                   DEFINITIONS

2.1 Definitions. The following terms shall have the meanings set forth below:

         (a) "Affiliated Corporation" means any corporation or other entity
(including but not limited to a partnership) which is affiliated with Apache
Corporation through stock ownership or otherwise and is treated as a common
employer under the provisions of Sections 414(b) and (c) or any successor
section(s) of the Internal Revenue Code.

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         (b) "Board" means the Board of Directors of the Company.

         (c) "Committee" means the Stock Option Plan Committee of the Board,
which is empowered hereunder to take actions in the administration of the Plan.
The Committee shall be constituted at all times as to permit the Plan to comply
with: (i) Rule 16b-3 or any successor rule(s) promulgated under the Securities
Exchange Act of 1934, as amended (the "1934 Act"), and (ii) Section 162(m) or
any successor section(s) of the Internal Revenue Code and the regulations
promulgated thereunder.

         (d) "Deferred Delivery Plan" means the Company's Deferred Delivery
Plan, effective as of February 10, 2000, as it may be amended from time to time,
or any successor plan.

         (e) "Depositary Shares" means the Depositary shares representing the
Company's preferred stock convertible into Stock.

         (f) "Eligible Employees" means full-time employees (including, without
limitation, officers and directors who are also employees), and certain
part-time employees, of the Company or any division thereof.

         (g) "Expiration Date" means the date on which the Option Period (as
defined in subsection 7.2(c) hereof) ends.

         (h) "Fair Market Value" means the closing price of the Stock or
Depositary Shares, as applicable, as reported on the New York Stock Exchange,
Inc. Composite Transactions Reporting System for a particular date. If on such
date there are no transactions in the Stock or Depositary Shares, as applicable,
the Fair Market Value shall be determined as of the immediately preceding date
on which there were transactions in the Stock or Depositary Shares, as
applicable.

         (i) "Internal Revenue Code" means the Internal Revenue Code of 1986, as
it may be amended from time to time.

         (j) "Option" means a right to purchase shares of Stock at a stated
price for a specified period of time. All Options granted under the Plan shall
be Options which are not "incentive stock options" as described in Section 422
or any successor section(s) of the Internal Revenue Code.

         (k) "Option Price" means the price at which shares of Stock subject to
an Option may be purchased, determined in accordance with subsection 7.2(b)
hereof.

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         (l) "Participant" means an Eligible Employee designated by the
Committee from time to time during the term of the Plan to receive one or more
Options under the Plan.

         (m) "Reload Option" has the meaning set forth in subsection 7.4 hereof.

         (n) "Stock" means the U.S. $1.25 par value Common Stock of the Company.

         (o) "Stock Units" means investment units under the Deferred Delivery
Plan, each of which is deemed to be equivalent to one share of Stock.

2.2 Headings; Gender and Number. The headings contained in the Plan are for
reference purposes only and shall not affect in any way the meaning or
interpretation of the Plan. Except when otherwise indicated by the context, the
masculine gender shall also include the feminine gender, and the definition of
any term herein in the singular shall also include the plural.

                                    SECTION 3

                               PLAN ADMINISTRATION

3.1 Administration by the Committee. The Plan shall be administered by the
Committee. In accordance with the provisions of the Plan, the Committee shall,
in its sole discretion, select the Participants from among the Eligible
Employees, determine the Options to be granted pursuant to the Plan, the number
of shares of Stock to be issued thereunder, the time at which such Options are
to be granted, fix the Option Price, and establish such other terms and
requirements as the Committee may deem necessary or desirable and consistent
with the terms of the Plan. The Committee shall determine the form or forms of
the agreements with Participants which shall evidence the particular provisions,
terms, conditions, rights and duties of the Company and the Participants with
respect to Options granted pursuant to the Plan, which provisions need not be
identical except as may be provided herein. The Committee may from time to time
adopt such rules and regulations for carrying out the purposes of the Plan as it
may deem proper and in the best interests of the Company. The Committee may
correct any defect, supply any omission or reconcile any inconsistency in the
Plan, or in any agreement entered into hereunder, in the manner and to the
extent it shall deem expedient and it shall be the sole and final judge of such
expediency. No member of the Committee shall be liable for any action or
determination made in good faith. The determination, interpretations and other

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actions of the Committee pursuant to the provisions of the Plan shall be binding
and conclusive for all purposes and on all persons.

3.2 Compliance with Section 162(m). The Plan is intended to comply with the
requirements of Section 162(m) or any successor section(s) of the Internal
Revenue Code ("Section 162(m)") as to any "covered employee" as defined in
Section 162(m), and shall be administered, interpreted and construed
consistently therewith. In accordance with this intent, the amount of income a
Participant may receive from Options granted under the Plan shall be based
solely on an increase in the value of the Stock after the date of the grant of
the Option, or such other bases as may be permitted by applicable law. The
Committee is authorized to take such additional action, if any, that may be
required to ensure that the Plan satisfies the requirements of Section 162(m)
and the regulations promulgated or revenue rulings published thereunder.

                                    SECTION 4

                            STOCK SUBJECT TO THE PLAN

4.1 Number of Shares. Subject to Sections 7.1 and 7.4 hereof and to adjustment
pursuant to Section 4.3 hereof, one million (1,000,000) shares of Stock are
authorized for issuance under the Plan in accordance with the provisions of the
Plan and subject to such restrictions or other provisions as the Committee may
from time to time deem necessary. This authorization may be increased from time
to time by approval of the Board and the stockholders of the Company if, on the
advice of counsel for the Company, such stockholder approval is required. Shares
of Stock which may be issued upon exercise of Options shall be applied to reduce
the maximum number of shares of Stock remaining available for use under the
Plan. The Company shall at all times during the term of the Plan and while any
Options are outstanding retain as authorized and unissued Stock, or as Stock in
the Company's treasury, at least the number of shares from time to time required
under the provisions of the Plan, or otherwise assure itself of its ability to
perform its obligations hereunder.

4.2 Other Shares of Stock. Any shares of Stock that are subject to an Option
which expires, is forfeited, is cancelled, or for any reason is terminated
unexercised, and any shares of Stock that for any other reason are not issued to
a Participant or are forfeited shall automatically become available for use
under the Plan.

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4.3 Adjustments for Stock Split, Stock Dividend, Etc. If the Company shall at
any time increase or decrease the number of its outstanding shares of Stock or
change in any way the rights and privileges of such shares by means of the
payment of a Stock dividend or any other distribution upon such shares payable
in Stock, or through a Stock split, subdivision, consolidation, combination,
reclassification or recapitalization involving the Stock, then in relation to
the Stock that is affected by one or more of the above events, the numbers,
rights and privileges of the following shall be increased, decreased or changed
in like manner as if they had been issued and outstanding, fully paid and
nonassessable at the time of such occurrence: (i) the shares of Stock as to
which Options may be granted under the Plan; and (ii) the shares of the Stock
then included in each outstanding Option granted hereunder.

4.4 Dividend Payable in Stock of Another Corporation, Etc. If the Company shall
at any time pay or make any dividend or other distribution upon the Stock
payable in securities or other property (except money or Stock), a proportionate
part of such securities or other property shall be set aside and delivered to
any Participant then holding an Option for the particular type of Stock for
which the dividend or other distribution was made, upon exercise thereof. Prior
to the time that any such securities or other property are delivered to a
Participant in accordance with the foregoing, the Company shall be the owner of
such securities or other property and shall have the right to vote the
securities, receive any dividends payable on such securities, and in all other
respects shall be treated as the owner. If securities or other property which
have been set aside by the Company in accordance with this Section are not
delivered to a Participant because an Option is not exercised, then such
securities or other property shall remain the property of the Company and shall
be dealt with by the Company as it shall determine in its sole discretion.

4.5 Other Changes in Stock. In the event there shall be any change, other than
as specified in Sections 4.3 and 4.4 hereof, in the number or kind of
outstanding shares of Stock or of any stock or other securities into which the
Stock shall be changed or for which it shall have been exchanged, and if the
Committee shall in its discretion determine that such change equitably requires
an adjustment in the number or kind of shares subject to outstanding Options or
which have been reserved for issuance pursuant to the Plan but are not then
subject to an Option, then such adjustments shall be made by the Committee and
shall be effective for all purposes of the Plan and on each outstanding Option
that involves the particular type of stock for which a change was effected.

4.6 Rights to Subscribe. If the Company shall at any time grant to the holders
of its Stock rights to subscribe pro rata for additional shares thereof or for
any other securities of the Company or of any other corporation, there shall be
reserved with respect to the shares then under Option to any Participant of the
particular class of Stock involved the

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Stock or other securities which the Participant would have been entitled to
subscribe for if immediately prior to such grant the Participant had exercised
his entire Option. If, upon exercise of any such Option, the Participant
subscribes for the additional shares or other securities, the aggregate Option
Price shall be increased by the amount of the price that is payable by the
Participant for such additional shares or other securities.

4.7 General Adjustment Rules. No adjustment or substitution provided for in this
Section 4 shall require the Company to sell a fractional share of Stock under
any Option, or otherwise issue a fractional share of Stock, and the total
substitution or adjustment with respect to each Option shall be limited by
deleting any fractional share. In the case of any such substitution or
adjustment, the aggregate Option Price for the shares of Stock then subject to
the Option shall remain unchanged but the Option Price per share under each such
Option shall be equitably adjusted by the Committee to reflect the greater or
lesser number of shares of Stock or other securities into which the Stock
subject to the Option may have been changed.

4.8 Determination by the Committee, Etc. Adjustments under this Section 4 shall
be made by the Committee, whose determinations with regard thereto shall be
final and binding upon all parties.

                                    SECTION 5

                          REORGANIZATION OR LIQUIDATION

In the event that the Company is merged or consolidated with another corporation
and the Company is not the surviving corporation, or if all or substantially all
of the assets or more than 20 percent of the outstanding voting stock of the
Company is acquired by any other corporation, business entity or person, or in
case of a reorganization (other than a reorganization under the United States
Bankruptcy Code) or liquidation of the Company, and if the provisions of Section
8 hereof do not apply, the Committee, or the board of directors of any
corporation assuming the obligations of the Company, shall, as to the Plan and
outstanding Options either (i) make appropriate provision for the adoption and
continuation of the Plan by the acquiring or successor corporation and for the
protection of any such outstanding Options by the substitution on an equitable
basis of appropriate stock of the Company or of the merged, consolidated or
otherwise reorganized corporation which will be issuable with respect to the
Stock, provided that no additional benefits shall be conferred upon the
Participants holding such Options as a result of such substitution, and the
excess of the aggregate Fair Market Value of the shares subject to the Options
immediately after such substitution over the aggregate Option Price thereof is

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not more than the excess of the aggregate Fair Market Value of the shares
subject to such Options immediately before such substitution over the aggregate
Option Price thereof, or (ii) upon written notice to the Participants, provide
that all unexercised Options shall be exercised within a specified number of
days of the date of such notice or such Options will be terminated. In the
latter event, the Committee shall accelerate the vesting dates of outstanding
Options so that all Options become fully vested and exercisable prior to any
such event.

                                    SECTION 6

                                  PARTICIPATION

Participants in the Plan shall be those Eligible Employees who, in the judgment
of the Committee, are performing, or during the term of their incentive
arrangement will perform, vital services in the management, operation and
development of the Company or an Affiliated Corporation, and significantly
contribute, or are expected to significantly contribute, to the achievement of
the Company's long-term corporate economic objectives. Participants may be
granted from time to time one or more Options; provided, however, that the grant
of each such Option shall be separately approved by the Committee, and receipt
of one such Option shall not result in automatic receipt of any other Option.
Upon determination by the Committee that an Option is to be granted to a
Participant, written notice shall be given to such person, specifying the terms,
conditions, rights and duties related thereto. Each Participant shall, if
required by the Committee, enter into an agreement with the Company, in such
form as the Committee shall determine and which is consistent with the
provisions of the Plan, specifying such terms, conditions, rights and duties.
Options shall be deemed to be granted as of the date specified in the grant
resolution of the Committee, which date shall be the date of any related
agreement with the Participant. In the event of any inconsistency between the
provisions of the Plan and any such agreement entered into hereunder, the
provisions of the Plan shall govern.

                                    SECTION 7

                                  STOCK OPTIONS

7.1 Grant of Stock Options. Coincident with or following designation for
participation in the Plan, an Eligible Employee may be granted one or more
Options. Grants of Options under the Plan shall be made by the Committee. In no
event shall the exercise of

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one Option affect the right to exercise any other Option or affect the number of
shares of Stock for which any other Option may be exercised, except as provided
in subsection 7.2(j) hereof. During the duration of the Plan, no Eligible
Employee may be granted Options which in the aggregate cover in excess of 25
percent of the total shares of Stock authorized under the Plan.

7.2 Stock Option Agreements. Each Option granted under the Plan shall be
evidenced by a written stock option agreement which shall be entered into by the
Company and the Participant to whom the Option is granted (the "Stock Option
Agreement"), and which shall contain the following terms and conditions, as well
as such other terms and conditions, not inconsistent therewith, as the Committee
may consider appropriate in each case:

         (a) Number of Shares. Each Stock Option Agreement shall state that it
covers a specified number of shares of Stock, as determined by the Committee.

         (b) Price. The price at which each share of Stock covered by an Option
may be purchased shall be determined in each case by the Committee and set forth
in the Stock Option Agreement, but in no event shall the price be less than the
Fair Market Value of the Stock on the date the Option is granted.

         (c) Duration of Options; Employment Required For Exercise. Each Stock
Option Agreement shall state the period of time, determined by the Committee,
within which the Option may be exercised by the Participant (the "Option
Period"). The Option Period must end, in all cases, not more than ten years from
the date an Option is granted. Except as otherwise provided in Sections 5 and 8
and subsections 7.2(d)(iv) and 7.4(a) hereof, each Option granted under the Plan
shall become exercisable in increments such that 25 percent of the Option
becomes exercisable on each of the four subsequent one-year anniversaries of the
date the Option is granted, provided that each such additional 25-percent
increment shall become exercisable only if the Participant has been continuously
employed by the Company from the date the Option is granted through the date on
which each such additional 25-percent increment becomes exercisable.

         (d) Termination of Employment, Death, Disability, Etc. Each Stock
Option Agreement shall provide as follows with respect to the exercise of the
Option upon termination of the employment or the death of the Participant:

                  (i) If the employment of the Participant by the Company is
terminated within the Option Period for cause, as determined by the Company, the
Option shall thereafter be void for all purposes. As used in this subsection
7.2(d), "cause" shall mean

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a gross violation, as determined by the Company, of the Company's established
policies and procedures, provided that the effect of this subsection 7.2(d)
shall be limited to determining the consequences of a termination and that
nothing in this subsection 7.2(d) shall restrict or otherwise interfere with the
Company's discretion with respect to the termination of any employee.

                  (ii) If the Participant retires from employment by the Company
on or after attaining age 65, the Option may be exercised by the Participant
within 36 months following his or her retirement (provided that such exercise
must occur within the Option Period), but not thereafter. In the event of the
Participant's death during such 36-month period, each Option may be exercised by
those entitled to do so in the manner referred to in (iv) below. In any such
case, the Option may be exercised only as to the shares as to which the Option
had become exercisable on or before the date of the Participant's retirement.

                  (iii) If the Participant becomes disabled (as determined
pursuant to the Company's Long-Term Disability Plan or any successor plan),
during the Option Period while still employed, or within the three-month period
referred to in subsection 7.2(d)(v) below, or within the 36-month period
referred to in subsection 7.2(d)(ii) above, the Option may be exercised by the
Participant or by his or her guardian or legal representative, within twelve
months following the Participant's disability, or within the 36-month period
referred to in subsection 7.2(d)(ii) above if applicable and if longer (provided
that such exercise must occur within the Option Period), but not thereafter. In
the event of the Participant's death during such twelve-month period, each
Option may be exercised by those entitled to do so in the manner referred to in
subsection 7.2(d)(iv) below. In any such case, the Option may be exercised only
as to the shares of Stock as to which the Option had become exercisable on or
before the date of the Participant's disability.

                  (iv) In the event of the Participant's death while still
employed by the Company, each Option of the deceased Participant may be
exercised by those entitled to do so under the Participant's will or under the
laws of descent and distribution within twelve months following the
Participant's death (provided that in any event such exercise must occur within
the Option Period), but not thereafter, as to all shares of Stock which are
subject to such Option, including each 25-percent increment of the Option, if
any, which has not yet become exercisable at the time of the Participant's
death. In the event of the Participant's death within the 36-month period
referred to in subsection 7.2(d)(ii) above or within the twelve-month period
referred to in subsection 7.2(d)(iii) above, each Option of the deceased
Participant that is exercisable at the time of death may be exercised by those
entitled to do so under the Participant's will or under the laws of

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descent and distribution within twelve months following the Participant's death
or within the 36-month period referred to in subsection 7.2(d)(ii) above, if
applicable and if longer (provided that in any event such exercise must occur
within the Option Period). The provisions of this paragraph (iv) of subsection
7.2(d) shall be applicable to each Stock Option Agreement as if set forth
therein word for word. Each Stock Option Agreement executed by the Company prior
to the adoption of this provision shall be deemed amended to include the
provisions of this paragraph and all Options granted pursuant to such Stock
Option Agreements shall be exercisable as provided herein.

                  (v) If the employment of the Participant by the Company is
terminated (which for this purpose means that the Participant is no longer
employed by the Company or by an Affiliated Corporation) within the Option
Period for any reason other than cause, the Participant's retirement on or after
attaining age 65, the Participant's disability or death, the Option may be
exercised by the Participant within three months following the date of such
termination (provided that such exercise must occur within the Option Period),
but not thereafter. In any such case, the Option may be exercised only as to the
shares as to which the Option had become exercisable on or before the date of
termination of the Participant's employment.

         (e) Transferability. Each Stock Option Agreement shall provide that the
Option granted therein is not transferable by the Participant except by will or
pursuant to the laws of descent and distribution, and that such Option is
exercisable during the Participant's lifetime only by him or her, or in the
event of the Participant's disability or incapacity, by his or her guardian or
legal representative.

         (f) Agreement to Continue in Employment. Each Stock Option Agreement
shall contain the Participant's agreement to remain in the employment of the
Company, at the pleasure of the Company, for a continuous period of at least one
year after the date of such Stock Option Agreement, at the salary rate in effect
on the date of such agreement or at such changed rate as may be fixed, from time
to time, by the Company.

         (g) Exercise, Payments, Etc.

                  (i) Each Stock Option Agreement shall provide that the method
for exercising the Option granted therein shall be by delivery to the Office of
the Secretary of the Company of written notice specifying the number of shares
of Stock with respect to which such Option is exercised and payment of the
aggregate Option Price. Such notice shall be in a form satisfactory to the
Committee and shall specify the particular Options (or portions thereof) which
are being exercised and the number of shares of Stock with respect to which the
Options are being exercised. The exercise of the Option shall be

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deemed effective on the date such notice is received by the Office of the
Secretary and payment is made to the Company of the aggregate Option Price (the
"Exercise Date"). If requested by the Company, such notice shall contain the
Participant's representation that he or she is purchasing the Stock for
investment purposes only and his or her agreement not to sell any Stock so
purchased in any manner that is in violation of the Securities Act of 1933, as
amended, or any applicable state law, and such restriction, or notice thereof,
shall be placed on the certificates representing the Stock so purchased. The
purchase of such Stock shall take place at the principal offices of the Company
upon delivery of such notice, at which time the aggregate Option Price shall be
paid in full by any of the methods or any combination of the methods set forth
in subsection 7.2(g)(iii) below.

                  (ii) Except as referenced below in connection with the
Deferred Delivery Plan, the shares of Stock to which the Participant is entitled
as a result of the exercise of the Option shall be issued by the Company and (A)
delivered by electronic means to an account designated by the Participant, or
(B) delivered to the Participant in the form of a properly executed certificate
or certificates representing such shares of Stock. If shares of Stock and/or
Depositary Shares are used to pay all or part of the aggregate Option Price, the
Company shall issue and deliver to the Participant the additional shares of
Stock, in excess of the aggregate Option Price or portion thereof paid using
shares of Stock or Depositary Shares, to which the Participant is entitled as a
result of the Option exercise. If the Participant exercising an Option (x) is
eligible for participation in the Deferred Delivery Plan, (y) pays the aggregate
Option Price pursuant to subsection 7.2(g)(iii)(A), (B), (C), (D) or (E) below,
and (z) has made an irrevocable election at least six months prior to the
Exercise Date as required under the Deferred Delivery Plan, the income resulting
from the Option exercise shall be deferred into the Participant's Deferred
Delivery Plan account and no additional shares of Stock shall be delivered to
the Participant.

                  (iii) the aggregate Option Price shall be paid by any of the
following methods or any combination of the following methods:

                           (A) in cash, including the wire transfer of funds in
U.S. dollars to one of the Company's bank accounts located in the United States,
with such bank account to be designated from time to time by the Company;

                           (B) by personal, certified or cashier's check payable
in U.S. dollars to the order of the Company;

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                           (C) by delivery to the Company of certificates
representing a number of shares of Stock then owned by the Participant, the
aggregate Fair Market Value of which (as of the Exercise Date) is not greater
than the aggregate Option Price of the Option being exercised, properly endorsed
for transfer to the Company, provided that the shares of Stock used for this
purpose must have been owned by the Participant for a period of at least six
months;

                           (D) by certification or attestation to the Company of
the Participant's ownership (as of the Exercise Date) of a number of shares of
Stock and/or Depositary Shares, the aggregate Fair Market Value of which (as of
the Exercise Date) is not greater than the aggregate Option Price of the Option
being exercised, provided that the shares of Stock and/or Depositary Shares used
for this purpose have been owned by the Participant for a period of at least six
months;

                           (E) if the income resulting from the Option exercise
is to be deferred into the Participant's Deferred Delivery Plan account, by
certification or attestation to the Company of the Participant's ownership (as
of the Exercise Date) of a number of vested Stock Units held in the
Participant's Deferred Delivery Plan account, the equivalent aggregate Fair
Market Value of which (as of the Exercise Date) is not greater than the
aggregate Option Price of the Option being exercised, provided that the Stock
Units used for this purpose were vested as of the Exercise Date; or

                           (F) by delivery to the Company of a properly executed
notice of exercise together with irrevocable instructions to a broker to
promptly deliver to the Company, by wire transfer or check as noted in
subsection 7.2(g)(iii)(A) and (B) above, the amount of the proceeds of the sale
of all or a portion of the Stock or of a loan from the broker to the Participant
necessary to pay the aggregate Option Price.

         (h) Date of Grant. An Option shall be considered as having been granted
on the date specified in the grant resolution of the Committee.

         (i) Tax Withholding. Each Stock Option Agreement shall provide that,
upon exercise of the Option, the Participant shall make appropriate arrangements
with the Company to provide for the amount of tax withholding required by
Sections 3102 and 3402 or any successor section(s) of the Internal Revenue Code
and applicable state and local income and other tax laws, including payment of
such taxes as provided in Section 13 hereof.

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         (j) Adjustment of Options. Subject to the provisions of Sections 4, 5,
7, 8 and 12 hereof, the Committee may make any adjustment in the number of
shares of Stock covered by, or the terms of an outstanding Option and a
subsequent granting of an Option, by amendment or by substitution for an
outstanding Option; however, except as provided in Sections 4, 5, 8 and 12
hereof, the Committee may not adjust the Option Price of any outstanding Option.
Such amendment or substitution may result in terms and conditions (including the
number of shares of Stock covered, vesting schedule or Option Period) that
differ from the terms and conditions of the original Option. The Committee may
not, however, adversely affect the rights of any Participant to previously
granted Options without the consent of such Participant. If such action is
effected by amendment, the effective date of grant of such amendment will be the
date of grant of the original Option.

7.3 Stockholder Privileges. No Participant shall have any rights as a
stockholder with respect to any shares of Stock covered by an Option until the
Participant becomes the holder of record of such Stock. Except as provided in
Section 4 hereof, no adjustments shall be made for dividends or other
distributions or other rights as to which there is a record date preceding the
date on which such Participant becomes the holder of record of such Stock.

7.4 Reload Provisions.

         (a) The Committee shall have the authority, but not an obligation, to
include as a part of any Stock Option Agreement provisions under which the
Participant shall be granted a further option (a "Reload Option") when the
Participant exercises all or part of the Option represented by such Stock Option
Agreement and pays all or part of the aggregate Option Price and/or required or
excess tax withholding pursuant to subsections 7.2(g)(iii)(C), (D) or (E) and/or
subsections 13.2(a), (b) or (c) and/or subsections 13.3(a) or (b) hereof. Any
Option including such reload provisions shall become exercisable in increments
such that 25 percent of the Option becomes exercisable on the dates six months,
12 months, 18 months and 24 months following the date the Option is granted,
provided that each such additional 25-percent increment shall become exercisable
only if the Participant has been continuously employed by the Company from the
date the Option is granted through the date on which such additional 25-percent
increment becomes exercisable.

         (b) Any shares of Stock issued to a Participant as a result of an
Option exercise which resulted in the grant of a Reload Option, may not be sold
or otherwise disposed of until the term of the original Option has expired or
the Participant is no longer employed

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by the Company or by an Affiliated Corporation. Any Stock Units acquired by a
Participant as a result of the deferral of income (pursuant to subsection
7.2(g)(ii) hereof) in connection with an Option exercise which resulted in the
grant of a Reload Option, may not be sold or otherwise disposed of until the
shares of Stock relating to such Stock Units are distributed under the terms of
the Deferred Delivery Plan.

         (c) A Reload Option shall be granted, without further action of the
Committee or the Participant, if one or more of the payment provisions
referenced in subsection 7.4(a) above are used and if all of the following are
satisfied as of the date of exercise of the underlying Option:

                  (i) the Participant has not previously been granted a Reload
Option or there has been a period of more than six months since the Participant
was last granted a Reload Option;

                  (ii) no shares of Stock have been sold or otherwise disposed
of in breach of the provisions of subsection 7.4(b) above;

                  (iii) the Fair Market Value of the shares of Stock covered by
the original Option being exercised is at least ten percent greater than the
Option Price for such shares; and

                  (iv) there is a period of more than six months remaining in
the term of the original Option.

         (d) Each Reload Option:

                  (i) shall cover that certain number of shares of Stock equal
to the shares or equivalent shares of Stock actually or constructively delivered
to the Company as referenced in subsection 7.4(a) above;

                  (ii) shall be deemed to be granted as of the date on which the
original Option is exercised and shall have an Option Price of 100 percent of
Fair Market Value on such date;

                  (iii) shall become exercisable six months after the date of
grant and shall have the same Expiration Date as the original Option; and

                  (iv) except as set forth in subsections 7.4(d)(i), (ii) and
(iii) above, shall have the same terms and conditions as those of the original
Option.

                                       14
<PAGE>   16

                                    SECTION 8

                                CHANGE IN CONTROL

8.1 In General. In the event of a change in control of the Company as defined in
Section 8.3 hereof, then the Committee may, in its sole discretion, without
obtaining stockholder approval, to the extent permitted in Section 12 hereof,
take any or all of the following actions: (a) accelerate the dates on which any
outstanding Options become exercisable or make all such Options fully vested and
exercisable; (b) grant a cash bonus award to any Participant in an amount
necessary to pay the aggregate Option Price of all or any portion of the Options
then held by such Participant; (c) pay cash to any or all Participants in
exchange for the cancellation of their outstanding Options in an amount equal to
the difference between the Option Price of such Options and the greater of the
tender offer price for the underlying Stock or the Fair Market Value of the
Stock on the date of the cancellation of the Options; and (d) make any other
adjustments or amendments to the outstanding Options.

8.2 Limitation on Payments. If the provisions of this Section 8 would result in
the receipt by any Participant of a payment within the meaning of Section 280G
or any successor section(s) of the Internal Revenue Code, and the regulations
promulgated thereunder, and if the receipt of such payment by any Participant
would, in the opinion of independent tax counsel of recognized standing selected
by the Company, result in the payment by such Participant of any excise tax
provided for in Sections 280G and 4999 or any successor section(s) of the
Internal Revenue Code, then the amount of such payment shall be reduced to the
extent required, in the opinion of independent tax counsel, to prevent the
imposition of such excise tax; provided, however, that the Committee, in its
sole discretion, may authorize the payment of all or any portion of the amount
of such reduction to the Participant.

8.3 Definition. For purposes of the Plan, a "change in control" shall mean any
of the events specified in the Company's Income Continuance Plan or any
successor plan which constitute a change in control within the meaning of such
plan.

                                       15
<PAGE>   17

                                    SECTION 9

                        RIGHTS OF EMPLOYEES, PARTICIPANTS

9.1 Employment. Nothing contained in the Plan or in any Option granted under the
Plan shall confer upon any Participant any right with respect to the
continuation of his or her employment by the Company or any Affiliated
Corporation, or interfere in any way with the right of the Company or any
Affiliated Corporation, subject to the terms of any separate employment
agreement to the contrary, at any time to terminate such employment or to
increase or decrease the level of the Participant's compensation from the level
in existence at the time of the grant of an Option. Whether an authorized leave
of absence, or absence in military or government service, shall constitute a
termination of employment shall be determined by the Committee at the time.

9.2 Nontransferability. No right or interest of any Participant in an Option
granted pursuant to the Plan shall be assignable or transferable during the
lifetime of the Participant, either voluntarily or involuntarily, or subjected
to any lien, directly or indirectly, by operation of law, or otherwise,
including execution, levy, garnishment, attachment, pledge or bankruptcy. In the
event of a Participant's death, a Participant's rights and interests in Options
shall, to the extent provided in Section 7 hereof, be transferable by
testamentary will or the laws of descent and distribution, and payment of any
amounts due under the Plan shall be made to, and exercise of any Options may be
made by, the Participant's legal representatives, heirs or legatees. If, in the
opinion of the Committee, a person entitled to payments or to exercise rights
with respect to the Plan is disabled from caring for his or her affairs because
of mental condition, physical condition or age, payment due such person may be
made to, and such rights shall be exercised by, such person's guardian,
conservator or other legal personal representative upon furnishing the Committee
with evidence of such status satisfactory to the Committee.

                                   SECTION 10

                              GENERAL RESTRICTIONS

10.1 Investment Representations. The Company may require a Participant, as a
condition of exercising an Option, to give written assurances in substance and
form satisfactory to the Company and its counsel to the effect that such person
is acquiring the Stock subject to the Option for his own account for investment
and not with any present intention of selling or otherwise distributing the
same, and to such other effects as the

                                       16
<PAGE>   18

Company deems necessary or appropriate in order to comply with federal and
applicable state securities laws.

10.2 Compliance with Securities Laws. Each Option shall be subject to the
requirement that, if at any time counsel to the Company shall determine that the
listing, registration or qualification of the shares of Stock subject to such
Option upon any securities exchange or under any state or federal law, or the
consent or approval of any governmental or regulatory body, is necessary as a
condition of, or in connection with, the issuance or purchase of shares of Stock
thereunder, such Option may not be accepted or exercised in whole or in part
unless such listing, registration, qualification, consent or approval shall have
been effected or obtained on conditions acceptable to the Committee. Nothing
herein shall be deemed to require the Company to apply for or to obtain such
listing, registration, qualification, consent or approval.

                                   SECTION 11

                             OTHER EMPLOYEE BENEFITS

The amount of any income deemed to be received by a Participant as a result of
the exercise of an Option shall not constitute "earnings" or "compensation" with
respect to which any other employee benefits of such Participant are determined
including, without limitation, benefits under any pension, profit sharing, life
insurance or salary continuation plan.

                                   SECTION 12

                  PLAN AMENDMENT, MODIFICATION AND TERMINATION

The Board may at any time terminate, and from time to time may amend or modify
the Plan provided, however, that no amendment or modification may become
effective without approval of the amendment or modification by the Company's
stockholders if stockholder approval is required to enable the Plan to satisfy
any applicable statutory or regulatory requirements unless the Company, on the
advice of counsel, determines that stockholder approval is otherwise necessary
or desirable.

No amendment, modification or termination of the Plan shall in any manner
adversely affect any Option theretofore granted under the Plan, without the
consent of the Participant holding such Option.

                                       17
<PAGE>   19

The Committee shall have the authority to adopt such modifications, procedures
and subplans as may be necessary or desirable to comply with the provisions of
the laws (including, but not limited to, tax laws and regulations) of countries
other than the United States in which the Company may operate, so as to assure
the viability of the benefits of the Plan to Participants employed in such
countries.

                                   SECTION 13

                                   WITHHOLDING

13.1 Withholding Requirement. The Company's obligations to deliver shares of
Stock upon the exercise of an Option, or to defer income resulting from an
Option exercise into the Deferred Delivery Plan, shall be subject to the
Participant's satisfaction of all applicable federal, state and local income and
other tax withholding requirements.

13.2 Satisfaction of Required Withholding. At the time the Committee grants an
Option, it may, in its sole discretion, grant the Participant an election to pay
all such amounts of required tax withholding, or any part thereof:

         (a) by the delivery to the Company of a number of shares of Stock then
owned by the Participant, the aggregate Fair Market Value of which (as of the
Exercise Date) is not greater than the amount required to be withheld, provided
that such shares have been held by the Participant for a period of at least six
months;

         (b) by certification or attestation to the Company of the Participant's
ownership (as of the Exercise Date) of a number of shares of Stock and/or
Depositary Shares, the aggregate Fair Market Value of which (as of the Exercise
Date) is not greater than the amount required to be withheld, provided that such
shares of Stock and/or Depositary Shares have been owned by the Participant for
a period of at least six months;

         (c) if the income resulting from the Option exercise is to be deferred
into the Participant's Deferred Delivery Plan account, by certification or
attestation to the Company of the Participant's ownership (as of the Exercise
Date) of a number of vested Stock Units held in the Participant's Deferred
Delivery Plan account, the equivalent aggregate Fair Market Value of which (as
of the Exercise Date) is not greater than the amount required to be withheld,
provided that such Stock Units were vested as of the Exercise Date; or

                                       18
<PAGE>   20

         (d) by the Company withholding from the shares of Stock otherwise
issuable to the Participant upon exercise of the Option, a number of shares of
Stock, the aggregate Fair Market Value of which (as of the Exercise Date) is not
greater than the amount required to be withheld. Any such elections by
Participants to have shares of Stock withheld for this purpose will be subject
to the following restrictions:

         (i) all elections shall be made on or prior to the Exercise Date; and

         (ii) all elections shall be irrevocable.

13.3 Excess Withholding. At the time the Committee grants an Option, it may, in
its sole discretion, grant the Participant an election to pay additional or
excess amounts of tax withholding, beyond the required amounts and up to the
Participant's marginal tax rate:

         (a) by delivery to the Company of a number of Shares of Stock then
owned by the Participant, the aggregate Fair Market Value of which (as of the
Exercise Date) is not greater than such excess withholding amount, provided that
such shares of Stock have been owned by the Participant for a period of at least
six months; or

         (b) by certification or attestation to the Company of the Participant's
ownership (as of the Exercise Date) of a number of shares of Stock and/or
Depositary Shares, the aggregate Fair Market Value of which (as of the Exercise
Date) is not greater than such excess withholding amount, provided that such
shares of Stock and/or Depositary Shares have been owned by the Participant for
a period of at least six months.

13.4 Section 16 Requirements. If the Participant is an officer or director of
the Company within the meaning of Section 16 or any successor section(s) of the
1934 Act ("Section 16"), the Participant must satisfy the requirements of such
Section 16 and any applicable rules and regulations thereunder with respect to
the use of shares of Stock, Depositary Shares and/or Stock Units to satisfy such
tax withholding obligation.

                                   SECTION 14

                               REQUIREMENTS OF LAW

14.1 Requirements of Law. The issuance of Stock and the payment of cash pursuant
to the Plan shall be subject to all applicable laws, rules and regulations.

                                       19
<PAGE>   21

14.2 Federal Securities Laws Requirements. If a Participant is an officer or
director of the Company within the meaning of Section 16, Options granted
hereunder shall be subject to all conditions required under Rule 16b-3, or any
successor rule(s) promulgated under the 1934 Act, to qualify the Option for any
exception from the provisions of Section 16 available under such Rule. Such
conditions are hereby incorporated herein by reference and shall be set forth in
the Stock Option Agreement with the Participant which describes the Option.

14.3 Governing Law. The Plan and all Stock Option Agreements hereunder shall be
construed in accordance with and governed by the laws of the State of Texas.

                                   SECTION 15

                              DURATION OF THE PLAN

The Plan shall terminate at such time as may be determined by the Board, and no
Option shall be granted after such termination. If not sooner terminated under
the preceding sentence, the Plan shall fully cease and expire at midnight on
February 10, 2005. Any Options outstanding at the time of the Plan termination
shall continue to be exercisable in accordance with the Stock Option Agreement
pertaining to each such Option.

Dated: September 14, 2000

                                        APACHE CORPORATION

ATTEST:

/s/ Cheri L. Peper                      By: /s/ Daniel L. Schaeffer
---------------------------------           -----------------------------------
Cheri L. Peper                              Daniel L. Schaeffer
Corporate Secretary                         Vice President

                                       20<PAGE>   1

                                                                     EXHIBIT 4.1

================================================================================

                            CALLON PETROLEUM COMPANY

                                       TO

                     AMERICAN STOCK TRANSFER & TRUST COMPANY

                                     TRUSTEE

                             SUBORDINATED INDENTURE

                          Dated as of October 26, 2000

                       SUBORDINATED SENIOR DEBT SECURITIES

================================================================================

<PAGE>   2

                                TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                                                                Page
                                                                                                                ----

<S>                                                                                                              <C>
ARTICLE ONE  DEFINITIONS AND OTHER PROVISIONS OF GENERAL APPLICATION..............................................1
         Section 101.      Definitions............................................................................1
         Section 102.      Rules of Construction.................................................................12
ARTICLE TWO  SECURITY FORMS......................................................................................13
         Section 201.      Forms Generally.......................................................................13
         Section 202.      Form of Trustee's Certificate of Authentication.......................................14
         Section 203.      Securities in Global Form; Certain Book-Entry Provisions..............................14
         Section 204.      Form of Legend for Book-Entry Securities..............................................15
ARTICLE THREE  THE SECURITIES....................................................................................15
         Section 301.      Amount Unlimited; Issuable in Series..................................................15
         Section 302.      Denominations.........................................................................19
         Section 303.      Execution, Authentication, Delivery and Dating........................................19
         Section 304.      Temporary Securities..................................................................21
         Section 305.      Registration, Registration of Transfer and Exchange...................................23
         Section 306.      Mutilated, Destroyed, Lost and Stolen Securities and Coupons..........................27
         Section 307.      Payment of Interest; Interest Rights Preserved........................................28
         Section 308.      Persons Deemed Owners.................................................................30
         Section 309.      Cancellation..........................................................................30
         Section 310.      Computation of Interest...............................................................31
         Section 311.      CUSIP Numbers.........................................................................31
ARTICLE FOUR  SATISFACTION AND DISCHARGE.........................................................................31
         Section 401.      Satisfaction and Discharge of Indenture...............................................31
         Section 402.      Application of Trust Money............................................................33
ARTICLE FIVE  REMEDIES...........................................................................................33
         Section 501.      Events of Default.....................................................................33
         Section 502.      Acceleration of Maturity; Rescission and Annulment....................................35
         Section 503.      Collection of Indebtedness and Suits for Enforcement by Trustee.......................36
         Section 504.      Trustee May File Proofs of Claim......................................................37
         Section 505.      Trustee May Enforce Claims Without Possession of Securities or Coupons................37
         Section 506.      Application of Money Collected........................................................37
         Section 507.      Limitation on Suits...................................................................38
         Section 508.      Unconditional Right of Holders to Receive Principal, Premium and Interest.............39
         Section 509.      Restoration of Rights and Remedies....................................................39
         Section 510.      Rights and Remedies Cumulative........................................................39
         Section 511.      Delay or Omission Not Waiver..........................................................40
         Section 512.      Control by Holders....................................................................40
         Section 513.      Waiver of Past Defaults...............................................................40
</TABLE>

                                       i

<PAGE>   3

<TABLE>
<S>                                                                                                             <C>
         Section 514.      Undertaking for Costs.................................................................41
         Section 515.      Waiver of Stay or Extension Laws......................................................41
ARTICLE SIX  THE TRUSTEE.........................................................................................41
         Section 601.      Duties of Trustee.....................................................................41
         Section 602.      Certain Rights of Trustee.............................................................42
         Section 603.      Trustee Not Responsible for Recitals or Issuance of Securities........................43
         Section 604.      May Hold Securities...................................................................44
         Section 605.      Money Held in Trust...................................................................44
         Section 606.      Compensation and Reimbursement........................................................44
         Section 607.      Corporate Trustee Required; Eligibility...............................................45
         Section 608.      Disqualification; Conflicting Interests...............................................45
         Section 609.      Resignation and Removal; Appointment of Successor.....................................45
         Section 610.      Acceptance of Appointment by Successor................................................47
         Section 611.      Merger, Conversion, Consolidation or Succession to Business...........................48
         Section 612.      Preferential Collection of Claims Against Company.....................................48
         Section 613.      Notice of Defaults....................................................................49
         Section 614.      Appointment of Authenticating Agent...................................................49
ARTICLE SEVEN  HOLDERS' LISTS AND REPORTS BY TRUSTEE AND COMPANY.................................................51
         Section 701       Holders' Lists; Holder Communications; Disclosures Respecting Holders.................51
         Section 702       Reports By Trustee....................................................................51
         Section 703       Reports by Company....................................................................52
ARTICLE EIGHT  CONSOLIDATION, MERGER, CONVEYANCE, TRANSFER OR LEASE..............................................52
         Section 801.      Company May Consolidate, Etc., Only on Certain Terms..................................52
         Section 802.      Successor Substituted.................................................................53
ARTICLE NINE  SUPPLEMENTAL INDENTURES............................................................................53
         Section 901.      Supplemental Indentures Without Consent of Holders....................................53
         Section 902.      Supplemental Indentures With Consent of Holders.......................................55
         Section 903.      Execution of Supplemental Indentures..................................................57
         Section 904.      Effect of Supplemental Indentures.....................................................57
         Section 905.      Conformity with Trust Indenture Act...................................................57
         Section 906.      Reference in Securities to Supplemental Indentures....................................57
         Section 907.      Subordination Unimpaired..............................................................57
         Section 908.      Effect on Senior Indebtedness.........................................................57
         Section 909.      Record Date...........................................................................58
ARTICLE TEN  COVENANTS...........................................................................................58
         Section 1001.     Payment of Principal, Premium and Interest............................................58
         Section 1002.     Maintenance of Office or Agency.......................................................58
         Section 1003.     Money for Securities Payments to Be Held in Trust.....................................60
         Section 1004.     Additional Amounts....................................................................61
         Section 1005.     Purchase of Securities by Company or Subsidiary.......................................62
         Section 1006.     Statement by Officer as to Default....................................................62
         Section 1007.     Waiver of Certain Covenants...........................................................62
</TABLE>

                                       ii

<PAGE>   4

<TABLE>
<S>                                                                                                             <C>
ARTICLE ELEVEN  REDEMPTION OF SECURITIES.........................................................................63
         Section 1101.     Applicability of Article..............................................................63
         Section 1102.     Election to Redeem; Notice to Trustee.................................................63
         Section 1103.     Selection of Securities to Be Redeemed................................................63
         Section 1104.     Notice of Redemption..................................................................63
         Section 1105.     Deposit of Redemption Price...........................................................65
         Section 1106.     Securities Payable on Redemption Date.................................................65
         Section 1107.     Securities Redeemed in Part...........................................................66
         Section 1108.     Purchase of Securities................................................................66
ARTICLE TWELVE  SINKING FUNDS....................................................................................66
         Section 1201.     Applicability of Article..............................................................66
         Section 1202.     Satisfaction of Sinking Fund Payments with Securities.................................66
         Section 1203.     Redemption of Securities for Sinking Fund.............................................67
ARTICLE THIRTEEN  DEFEASANCE AND COVENANT DEFEASANCE.............................................................67
         Section 1301.     Company's Option to Effect Defeasance or Covenant Defeasance..........................67
         Section 1302.     Defeasance and Discharge..............................................................67
         Section 1303.     Covenant Defeasance...................................................................68
         Section 1304.     Conditions to Defeasance or Covenant Defeasance.......................................68
         Section 1305.     Deposited Money and U.S. Government Obligations to be Held in
                           Trust; Miscellaneous Provisions.......................................................70
         Section 1306.     Reinstatement.........................................................................71
ARTICLE FOURTEEN  HOLDERS' MEETINGS..............................................................................71
         Section 1401.     Purposes for Which Meetings May Be Called.............................................71
         Section 1402.     Call, Notice and Place of Meetings....................................................71
         Section 1403.     Persons Entitled to Vote at Meetings..................................................72
         Section 1404.     Quorum; Action........................................................................72
         Section 1405.     Determination of Voting Rights; Conduct and Adjournment of Meetings...................73
         Section 1406.     Counting Votes and Recording Action of Meetings.......................................73
ARTICLE FIFTEEN  CONVERSION OF SECURITIES........................................................................74
         Section 1501.     Applicability of Article..............................................................74
         Section 1502.     Exercise of Conversion Privilege......................................................74
         Section 1503.     Fractional Interests..................................................................75
         Section 1504.     Adjustment of Conversion Price........................................................76
         Section 1505.     Continuation of Conversion Privilege in Case of Merger,
                           Consolidation or Sale of Assets.......................................................78
         Section 1506.     Notice of Certain Events..............................................................79
         Section 1507.     Taxes on Conversion...................................................................80
         Section 1508.     Company to Provide Stock..............................................................80
         Section 1509.     Disclaimer of Responsibility for Certain Matters......................................81
         Section 1510.     Return of Funds Deposited for Redemption of Converted Securities......................81
ARTICLE SIXTEEN  SUBORDINATION OF SECURITIES.....................................................................82
         Section 1601.     Securities Subordinate to Senior Indebtedness.........................................82
         Section 1602.     Payment over of Proceeds upon Dissolution, etc........................................82
         Section 1603.     Suspension of Payment When Senior Indebtedness in Default.............................83
</TABLE>

                                      iii

<PAGE>   5

<TABLE>
<S>              <C>                                                                                            <C>
         Section 1604.     Payment Permitted If No Default.......................................................84
         Section 1605.     Subrogation to Rights of Holders of Senior Indebtedness...............................84
         Section 1606.     Provisions Solely to Define Relative Rights...........................................85
         Section 1607.     Trustee to Effectuate Subordination...................................................85
         Section 1608.     No Waiver of Subordination Provision..................................................85
         Section 1609.     Notice to Trustee.....................................................................86
         Section 1610.     Reliance on Judicial Order or Certificate of Liquidating Agent Bank...................87
         Section 1611.     Rights of Trustee as a Holder of Senior Indebtedness; Preservation of
                           Trustee's Rights......................................................................87
         Section 1612.     Article Applicable to Paying Agents...................................................87
         Section 1613.     No Suspension of Remedies.............................................................87
         Section 1614.     Trust Money Not Subordinated..........................................................87
ARTICLE SEVENTEEN  MISCELLANEOUS PROVISIONS......................................................................88
         Section 1701.     Compliance Certificates and Opinions..................................................88
         Section 1702.     Form of Documents Delivered to Trustee................................................88
         Section 1703.     Acts of Holders; Record Dates.........................................................89
         Section 1704.     Notices, Etc., to Trustee and Company.................................................91
         Section 1705.     Notice to Holders; Waiver.............................................................91
         Section 1706.     Language of Notices, Etc..............................................................92
         Section 1707.     Conflict with Trust Indenture Act.....................................................92
         Section 1708.     Effect of Headings and Table of Contents..............................................92
         Section 1709.     Successors and Assigns................................................................92
         Section 1710.     Separability Clause...................................................................93
         Section 1711.     Benefits of Indenture.................................................................93
         Section 1712.     Governing Law.........................................................................93
         Section 1713.     Legal Holidays........................................................................93
         Section 1714.     No Recourse Against Others............................................................93
         Section 1715.     Execution in Counterparts.............................................................94
         Section 1716.     No Adverse Interpretation of Other Agreements.........................................94
</TABLE>

                                       iv

<PAGE>   6

CALLON PETROLEUM COMPANY RECONCILIATION AND TIE BETWEEN TRUST INDENTURE ACT OF
1939 AND INDENTURE DATED AS OF OCTOBER 26, 2000.

<TABLE>
<CAPTION>
Trust Indenture Act Section                                  Indenture Section
---------------------------                                  -----------------
<S>                                                          <C>
Section 310       (a)(1)                                     607
                  (a)(2)                                     607
                  (a)(3)                                     Not applicable
                  (a)(4)                                     Not applicable
                  (b)                                        608, 609
Section 311       (a)                                        612
                  (b)                                        612
Section 312       (a)                                        701
                  (b)                                        701
                  (c)                                        701
Section 313       (a)                                        702
                  (b)                                        702
                  (c)                                        702
                  (d)                                        702
Section 314       (a)(1)-(3)                                 703
                  (a)(4)                                     1701, 1006
                  (b)                                        Not Applicable
                  (c)(1)                                     1701
                  (c)(2)                                     1701
                  (c)(3)                                     Not Applicable
                  (d)                                        Not Applicable
                  (e)                                        1701
Section 315       (a)                                        601
                  (b)                                        613
                  (c)                                        601
                  (d)                                        601
                  (e)                                        514
Section 316       (a)                                        1701
                  (a)(1)(A)                                  502, 512
                  (a)(1)(B)                                  513
                  (a)(2)                                     Not Applicable
                  (b)                                        508
                  (c)                                        1703
Section 317       (a)(1)                                     503
                  (a)(2)                                     504
                  (b)                                        1003
Section 318       (a)                                        1707

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

                                       v

<PAGE>   7

     SUBORDINATED INDENTURE, dated as of October 26, 2000, between CALLON
PETROLEUM COMPANY, a Delaware corporation (herein called the "Company"), having
its principal office at 200 North Canal Street, Natchez, Mississippi 39120, and
AMERICAN STOCK TRANSFER & TRUST COMPANY, a corporation duly organized and
existing under the laws of the state of New York, as Trustee (herein called the
"Trustee").

                             RECITALS OF THE COMPANY

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

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

     NOW, THEREFORE, THIS INDENTURE

                                   WITNESSETH:

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

       ARTICLE ONE DEFINITIONS AND OTHER PROVISIONS OF GENERAL APPLICATION

     SECTION 101. DEFINITIONS.

     "Act", when used with respect to any Holder of a Security, has the meaning
specified in Section 1703.

     "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" (including, with correlative meanings, the terms "controlling,"
"controlled by" and "under common control with"), as used with respect to any
Person, shall mean the power to direct or cause the direction of the management
or policies of such Person, whether through the ownership of voting securities,
by agreement or otherwise.

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

     "Authorized Newspaper" means a newspaper, in the English language or in an
official language of the country of publication, customarily published on each
Business Day, whether or not published on Saturdays, Sundays or holidays, and of
general circulation in the place in

                                       1

<PAGE>   8

connection with which the term is used or in the financial community of such
place. Where successive publications are required to be made in Authorized
Newspapers, the successive publications may be made in the same or in different
newspapers in the same city meeting the foregoing requirements and in each case
on any Business Day.

     "Bearer Security" means any Security in the form established pursuant to
Section 201 which is payable to bearer, including, without limitation, a
Security in temporary or permanent global form.

     "Board of Directors" means, with respect to the Company, either the board
of directors of the Company or any duly authorized committee of such board of
directors, and, with respect to any Subsidiary, either the board of directors of
such Subsidiary or any duly authorized committee of that board.

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

     "Book-Entry Security" means a Security bearing the legend specified in
Section 204, evidencing all or part of a series of Securities, issued to the
Depositary for such series or its nominee, and registered in the name of such
Depositary or nominee. Book-Entry Securities shall not be deemed to be
Securities in global form for purposes of Sections 201 and 203 and Article Three
of this Indenture.

     "Business Day", (i) when used with respect to any Place of Payment or any
other particular location referred to in this Indenture or in the Securities,
means each Monday, Tuesday, Wednesday, Thursday and Friday which is not a day on
which banking institutions in that Place of Payment or other location or the
Federal Reserve Banks are authorized or obligated by law or executive order to
close, and (ii) when used in any other context, means each Monday, Tuesday,
Wednesday, Thursday and Friday which is not a day on which banking institutions
in New York are authorized or obligated by law or executive order to close.

     "Capitalized Lease Obligation" means any obligation to pay rent or other
amounts under a lease of (or other agreement conveying the right to use) any
Property (whether real, personal) that is required to be classified and
accounted for as a capital lease obligation on a balance sheet under GAAP, and,
for the purpose of this Indenture, the amount of such obligation at any date
shall be the capitalized amount thereof at such date, determined in accordance
with GAAP.

     "Capital Stock" means, with respect to any Person, any and all shares,
interests, participations, rights in or other equivalents in the equity
interests (however designated) in such Person, and any rights, warrants or
options exercisable for, exchangeable for or convertible into such an equity
interest in such Person.

                                       2

<PAGE>   9

     "Certification Date" means with respect to Securities of any series (i), if
Bearer Securities of such series are not to be initially represented by a
temporary global Security, the date of delivery of the definitive Bearer
Security and (ii), if Bearer Securities of such series are initially represented
by a temporary global Security, the earlier of (A) the Exchange Date with
respect to Securities of such series and (B), if the first Interest Payment Date
with respect to Securities of such series is prior to such Exchange Date, such
Interest Payment Date.

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

     "Common Depositary" has the meaning specified in Section 304.

     "Common Stock" of any Person means Capital Stock of such Person that does
not rank prior, as to the payment of dividends or as to the distribution of
assets upon any voluntary or involuntary liquidation, dissolution or winding-up
of such Person, to shares of Capital Stock of any other class of such Person.

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

     "Company Request" or "Company Order" means a written request or order, as
the case may be, signed in the name of the Company by the Chairman or the Vice
Chairman of the Board of Directors, the Chief Executive Officer, the President,
a Vice President, the Treasurer, an Assistant Treasurer, the Secretary, an
Assistant Secretary, of the Company, or by another officer of the Company duly
authorized to sign by a Board Resolution, and delivered to the Trustee.

     "Conversion Agent" means any Person authorized by the Company to convert
any Securities on behalf of the Company.

     "Conversion Price" has the meaning specified in Section 1504.

     "Corporate Trust Office" means the principal corporate trust office of the
Trustee at which at any particular time its corporate trust business shall be
administered, which office at the date of original execution of this Indenture
is located at 59 Maiden Lane, New York, New York 10038.

     "corporation" means a corporation, association, companies, limited
liability company, joint-stock company or business trust.

     "covenant defeasance" has the meaning specified in Section 1303.

                                       3

<PAGE>   10

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

     "Credit Facility" means that certain Amended and Restated Credit Agreement,
dated as of October 31, 1996, among the Company, Callon Petroleum Operating
Company, a Delaware corporation and wholly owned Subsidiary of the Company
("Operating"), Callon Offshore Production, Inc., a Mississippi corporation and
wholly owned Subsidiary of Operating, the several banks and other financial
institutions from time to time parties thereto (the "Banks"), and The Chase
Manhattan Bank, as agent for the Banks, as amended, and as the same may be
further amended, modified, supplemented, extended, restated, replaced, renewed
or refinanced from time to time.

     "CUSIP Number" means, with respect to the Securities, an identification
number assigned to such security pursuant to the procedures of the Committee on
Uniform Security Identification Procedures and by the CUSIP Service Bureau.

     "Date of Conversion" has the meaning set forth in Section 1502.

     "Default" means any event that is or with the passage of time or giving of
notice or both would be an Event of Default.

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

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

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

     "Euro-clear" means the operator of the Euro-clear System.

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

     "Exchange Act" means the Securities Exchange Act of 1934, as amended from
time to time, and any successor act thereto.

     "Exchange Date" has the meaning specified in Section 304.

     "Fair Market Value" means the fair market value of a Property (including
shares of Capital Stock) as determined in good faith by the Board of Directors
of the Company and evidenced by a Board Resolution, which determination shall be
conclusive for purposes of this Indenture; provided, however, that unless
otherwise specified herein, the Board of Directors shall

                                       4

<PAGE>   11

be under no obligation to obtain any valuation or assessment from any investment
banker, appraiser or other third party.

     "Federal Bankruptcy Code" means the United States Bankruptcy Code of Title
11 of the United States Code, as amended from time to time.

     "Finance Person" means subsidiary of the Company, the Common Stock of which
is owned by the Company, that does not engage in any activity other than (i) the
holding of Subordinated Indebtedness with respect to which payments of interest
on such Subordinated Indebtedness can, at the election of the issuer thereof, be
deferred for one or more payment periods, (ii) the issuance of Common Stock
and/or debt securities and (iii) any activity necessary, incidental or related
to the foregoing.

     "GAAP" means United States 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 of the United States of America, which are effective
at the date of this Indenture.

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

     "Indebtedness" means any of the following obligations of the Company or any
Restricted Subsidiary: (1) any obligations, contingent or otherwise, for
borrowed money or for the deferred purchase price of property, assets,
securities or services (including, without limitation, any interest accruing
subsequent to an Event of Default), (2) all obligations (including the
Securities) evidenced by bonds, notes, debentures or other similar instruments,
(3) all indebtedness created or arising under any conditional sale or other
title retention agreement with respect to property acquired (even though the
rights and remedies of the seller or lender under such agreement in the event of
default are limited to repossession or sale of such property), except any such
obligation that constitutes a trade payable and an accrued liability arising in
the ordinary course of business, if and to the extent any of the foregoing
indebtedness would appear as a liability upon a balance sheet prepared in
accordance with GAAP, (4) all Capitalized Lease Obligations, (5) liabilities of
the Company actually due and payable under bankers acceptances and letters of
credit, (6) all indebtedness of the type referred to in clause (1), (2), (3),
(4) or (5) above secured by (or for which the holder of such indebtedness has an
existing right, contingent or otherwise, to be secured by) any Lien upon or
security interest in property of the Company or any Restricted Subsidiary
(including, without limitation, accounts and contract rights), even though the
Company or any Restricted Subsidiary has not assumed or become liable for the
payment of such indebtedness, and (7) any guarantee or endorsement (other than
for collection or deposit in the ordinary course of business) or discount with
recourse of, or other agreement, contingent or otherwise, to purchase,
repurchase, or otherwise acquire, to supply, or advance funds or become

                                       5

<PAGE>   12

liable with respect to, any indebtedness or any obligation of the type referred
to in any of the foregoing clauses (1) through (6), regardless of whether such
obligation would appear on a balance sheet; provided, however, that Indebtedness
shall not include (i) Production Payments, (ii) any liability for gas balancing
incurred in the ordinary course of business, (iii) accounts payable or other
obligations of the Company or a Restricted Subsidiary in the ordinary course of
business in connection with the obtaining of goods or services, and (iv) any
liability under any and all (A) employment or consulting agreements or employee
benefit plans or arrangements and (B) futures contracts, forward contracts,
swap, cap or collar contracts, option contracts, or other similar derivative
agreements.

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

     "Indexed Security" means any Security which provides that the principal
amount thereof payable at Stated Maturity may be more or less than the principal
face amount thereof at original issuance.

     "Insolvency or Liquidation Proceeding" means, with respect to any Person,
(a) an insolvency or bankruptcy case or proceeding, or any receivership,
liquidation, reorganization or similar case or proceeding in connection
therewith, relative to such Person or its creditors, as such, or its assets or
(b) any liquidation, dissolution or other winding-up proceeding of such Person,
whether voluntary or involuntary and whether or not involving insolvency or
bankruptcy or (c) any assignment for the benefit of creditors or any other
marshaling of assets and liabilities of such Person.

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

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

     "Interest Rate Protection Obligations" means the obligations of any Person
pursuant to any arrangement with any other Person whereby, directly or
indirectly, such Person is entitled to receive from time to time periodic
payments calculated by applying either a floating or a fixed rate of interest on
a stated notional amount in exchange for periodic payments made by such Person
calculated by applying a fixed or a floating rate of interest on the same
notional amount and shall include, without limitation, interest rate swaps,
caps, floors, collars and similar agreements or arrangements designed to protect
against or manage such Person's and any of its Subsidiaries' exposure to
fluctuations in interest rates.

                                       6

<PAGE>   13

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

     "Issue Date" means, when used with respect to a Security of a particular
series, the date upon which the Securities of such series first were issued and
authenticated under this Indenture.

     "Judgment Currency" has the meaning specified in Section 506.

     "legal defeasance" has the meaning specified in Section 1302.

     "Last Sale Price" has the meaning specified in Section 1503.

     "Lien" means any mortgage, charge, pledge, lien (statutory or other),
security interest, hypothecation, assignment for security, claim, or preference
or priority or other encumbrance or similar agreement or preferential
arrangement of any kind or nature whatsoever (including, without limitation, any
agreement to give or grant a Lien or any lease, conditional sale or other title
retention agreement having substantially the same economic effect as any of the
foregoing) upon or with respect to any Property of any kind. A Person shall be
deemed to own subject to a Lien any Property which such Person has acquired or
holds subject to the interest of a vendor or lessor under any conditional sale
agreement, capital lease or other title retention agreement.

     "Maturity", when used with respect to any Security, means the date on which
the principal of such Security or an installment of principal becomes due and
payable as therein or herein provided, whether at the Stated Maturity or by
declaration of acceleration, notice of redemption, and includes any Redemption
Date.

     "Non-payment Event of Default" means any event (other than a Payment Event
of Default), the occurrence of which (with or without notice or the passage of
time) entitles one or more Persons to accelerate the maturity of any Specified
Senior Indebtedness.

     "Officers' Certificate" means a certificate signed by the Chairman or the
Vice Chairman of the Board of Directors, the Chief Executive Officer, the
President or a Vice President, and by the Treasurer, an Assistant Treasurer, the
Secretary or an Assistant Secretary, of the Company, and delivered to the
Trustee.

     "Opinion of Counsel" means a written opinion of counsel, who may be counsel
for the Company, including an employee of the Company or other counsel, and who
shall be reasonably acceptable to the Trustee.

     "Original Issue Discount Security" means any Security which is issued at a
price lower than the principal amount payable upon the Stated Maturity thereof
and which provides for an amount less than the principal amount thereof to be
due and payable upon redemption thereof or upon a declaration of acceleration of
the Maturity thereof pursuant to Section 502.

                                       7

<PAGE>   14

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

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

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

          (3) Securities, except to the extent provided in Sections 1302 and
     1303 hereof, with respect to which the Company has effected legal
     defeasance or covenant defeasance as provided in Article Thirteen hereof;
     and

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

provided, however, that in determining whether the Holders of the requisite
principal amount of the Outstanding Securities have given, made or taken any
request, demand, authorization, direction, consent, notice, waiver hereunder,
Securities owned by the Company or any other obligor upon the Securities or any
Affiliate of the Company or of such other obligor shall be disregarded and
deemed not to be Outstanding, except that, in determining whether the Trustee
shall be protected in making such calculation or relying upon any such request,
demand, authorization, direction, notice, consent, waiver or other action, only
Securities which the Trustee knows to be 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 Company or any other obligor upon the Securities or any Affiliate of
the Company or of such other obligor.

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

     "Payment Blockage Notice" has the meaning specified in Section 1603.

     "Payment Blockage Period" has the meaning specified in Section 1603.

                                       8

<PAGE>   15

     "Payment Event of Default" means any default in the payment or required
prepayment of principal of (or premium, if any, on) or interest on any Specified
Senior Indebtedness when due (whether at final maturity, upon scheduled
installment, upon acceleration or otherwise).

     "Permitted Junior Securities" means any equity securities or subordinated
debt securities of the Company or any successor obligor with respect to the
Senior Indebtedness provided for by a plan of reorganization or readjustment
that, in the case of any such subordinated debt securities, are subordinated in
right of payment to all Senior Indebtedness that may at the time be outstanding
to substantially the same degree as, or to a greater extent than, the Securities
are so subordinated as provided in this Indenture.

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

     "Place of Payment," when used with respect to the Securities of any series,
means the place or places where the principal of and any premium and interest on
the Securities of that series are payable as specified as contemplated by
Section 301, subject to the provisions of Section 1002.

     "Predecessor Security" of any particular Security means every previous
Security, including any Security of a different series, evidencing all or a
portion of the same debt as that evidenced by such particular Security; and, for
the purposes of this definition, any Security authenticated and delivered under
Section 306 hereof in exchange for a mutilated security or in lieu of a lost,
destroyed or stolen Security shall be deemed to evidence the same debt as the
mutilated, lost, destroyed or stolen Security.

     "Preferred Stock" means, with respect to any Person, any and all shares,
interests, participations or other equivalents (however designated) of such
Person's preferred or preference stock, whether now outstanding or issued after
the date of this Indenture, including, without limitation, all classes and
series of preferred or preference stock of such Person.

     "Production Payments" means the grant or transfer to any Person of a
royalty, overriding royalty, net profits interest, production payment (whether
volumetric or dollar denominated), master limited partnership interest or other
interest in oil and gas properties, which reserves the right to receive all or a
portion of the production or the proceeds from the sale of production
attributable to such properties where the holder of such interest has recourse
solely to such production or proceeds of production, subject to the obligation
of the grantor or transferor to operate and maintain, or cause the subject
interests to be operated and maintained, in a reasonably prudent manner or other
customary standard or subject to the obligation of the grantor or transferor to
indemnify for environmental matters.

     "Property" means, with respect to any Person, any interest of such Person
in any kind of property or asset, whether real, personal or mixed, or tangible
or intangible, including, without limitation, Capital Stock in any other Person.

                                       9

<PAGE>   16

     "Redeemable Capital Stock" means any Capital Stock that, either by its
terms, by the terms of any security into which it is convertible or exchangeable
or by contract or otherwise, is, or upon the happening of an event or passage of
time would be, required to be redeemed prior to the final Stated Maturity of the
Securities or is redeemable at the option of the holder thereof at any time
prior to such final Stated Maturity, or is convertible into or exchangeable for
debt securities at any time prior to such final Stated Maturity; provided, that
Redeemable Capital Stock shall not include any security by virtue of the fact
that it may be exchanged or converted at the option of the holder, or at the
option of the Company, into Common Stock of the Company.

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

     "Redemption Price", when used with respect to any Security to be redeemed,
in whole or in part, means the price at which it is to be redeemed pursuant to
this Indenture.

     "Registered Security" means any Security in the form established pursuant
to Section 201 which is registered in the Security Register.

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

     "Required Currency" has the meaning specified in Section 506.

     "Responsible Officer," when used with respect to the Trustee, means any
officer in the Corporate Trust Department of the Trustee, and also means, with
respect to a particular corporate trust matter, any other officer of the Trustee
to whom such matter is referred because of his knowledge of and familiarity with
the particular subject.

     "Securities" has the meaning stated in the first recital of this Indenture,
as amended or supplemented from time to time in accordance with the terms
hereof, and more particularly means any Securities authenticated and delivered
under this Indenture.

     "Securities Act" means the Securities Act of 1933, as amended from time to
time, and any successor act thereto.

     "Security Custodian" means, with respect to Securities of a series, the
Trustee for Securities of such series, as custodian with respect to the
Securities of such series issued in global form, or any successor entity
thereto.

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

                                       10

<PAGE>   17

     "Senior Indebtedness" means the principal amount of, premium, if any, and
interest on and all other amounts due on or in connection with, (1) any
Indebtedness of the Company, whether now outstanding or hereafter created,
incurred, assumed or guaranteed, unless in the instrument creating or evidencing
such Indebtedness or pursuant to which such Indebtedness is outstanding it is
provided that such indebtedness is subordinate in right of payment or in rights
upon liquidation to any other Indebtedness of the Company and (2) all renewals,
extensions and refundings of any such Indebtedness.

     "Special Record Date" for the payment of any Defaulted Interest on the
Registered Securities of any series means a date fixed pursuant to Section 307.

     "Specified Senior Indebtedness" means (a) all Senior Indebtedness of the
Company in respect of the Credit Facility and any renewals, amendments,
extensions, supplements, modifications, deferrals, refinancings, or replacements
(each, for purposes of this definition, a "refinancing") thereof by the Company,
including any successive refinancings thereof by the Company and (b) any other
Senior Indebtedness and any refinancings thereof by the Company having a
principal amount of at least $5,000,000 as of the date of determination and
provided that the agreements, indentures or other instruments evidencing such
Senior Indebtedness or pursuant to which such Senior Indebtedness was issued
specifically designates such Senior Indebtedness as "Specified Senior
Indebtedness" for purposes of this Indenture. For purposes of this definition, a
refinancing of any Specified Senior Indebtedness shall be treated as a Specified
Senior Indebtedness only if the Indebtedness issued in such refinancing ranks or
would rank pari passu with the Specified Senior Indebtedness refinanced.

     "Stated Maturity" means, when used with respect to any Security or any
installment of principal thereof or interest thereon, the date specified in such
Security or a coupon representing such installment of interest as the fixed date
on which the principal of such Security or such installment of principal or
interest is due and payable and, when used with respect to any other
Indebtedness or any installment of interest thereon, means the date specified in
the instrument evidencing or governing such Indebtedness as the fixed date on
which the principal of such Indebtedness or such installment of interest is due
and payable.

     "Subsidiary" means any corporation of which at the time of determination
the Company or one or more Subsidiaries owns or controls directly or indirectly
more than 50% of the shares of Voting Stock.

     "Surviving Entity" has the meaning specified in Section 801.

     "Trading Day" has the meaning specified in Section 1503.

     "Trust Indenture Act" or "TIA" means the United States Trust Indenture Act
of 1939 as amended and in force at the date as of which this Indenture was
executed; provided, however, that in the event the United States Trust Indenture
Act of l939 is amended after such date, "Trust Indenture Act" means, to the
extent required by any such amendment, the United States Trust Indenture Act of
1939 as so amended.

                                       11

<PAGE>   18

     "Trustee" means the Person named as the "Trustee" in the first paragraph of
this Indenture until a successor Trustee shall have become such pursuant to the
applicable provisions of this Indenture, and thereafter "Trustee" shall mean or
include each Person who is then a Trustee hereunder, 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 Securities of that series.

     "United States" means the United States of America (including the States
and the District of Columbia), its territories, its possessions and other areas
subject to its jurisdiction.

     "United States Alien" means any Person who, for United States Federal
income tax purposes, is a foreign corporation, a non-resident alien individual,
a non-resident alien fiduciary of a foreign estate or trust, or a foreign
partnership one or more of the members of which is, for United States Federal
income tax purposes, a foreign corporation, a non-resident alien individual or a
non-resident alien fiduciary of a foreign estate or trust.

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

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

     "Voting Stock" means stock, interests, participations, rights in or other
equivalents in the equity interests (however designated) with respect to a
corporation having general voting power under ordinary circumstances to elect at
least a majority of the board of directors, managers or trustees of such
corporation; provided that, for the purposes hereof, stock which carries only
the right to vote conditionally on the happening of an event shall not be
considered Voting Stock whether or not such event shall have happened.

     SECTION 102. RULES OF CONSTRUCTION.

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

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

          (2) all other terms used herein which are defined in the Trust
     Indenture Act, either directly or by reference therein, have the meanings
     assigned to them therein;

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

                                       12

<PAGE>   19

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

          (5) the words "herein", "hereof" and "hereunder" and other words of
     similar import refer to this Indenture as a whole and not to any particular
     Article, Section or other subdivision, and the words "date of this
     Indenture" and "date hereof" and other words of similar import refer to the
     effective date of the original execution and delivery of this Indenture,
     viz. October 26, 2000.

          (6) the masculine gender includes the feminine and the neuter;

          (7) references to agreements and other instruments include subsequent
     amendments and waivers but only to the extent not prohibited by this
     Indenture; and

          (8) unless otherwise indicated, all dollar amounts are expressed in
     U.S. dollars.

                           ARTICLE TWO SECURITY FORMS

     SECTION 201. FORMS GENERALLY.

     The Registered Securities, if any, of each series and the Bearer
Securities, if any, of each series and related coupons shall be in substantially
the form (including temporary or permanent global form) as shall be established
by or pursuant to a Board Resolution or in one or more indentures supplemental
hereto, in each case with such appropriate insertions, omissions, substitutions
and other variations as are required or permitted by this Indenture, and may
have such letters, numbers or other marks of identification and such legends or
endorsements placed thereon as may be required to comply with law, or with the
rules of any securities exchange or to conform to general usage, all as may,
consistently herewith, be determined by the officers executing such Securities
or coupons, as evidenced by their execution of the Securities or coupons. If
temporary Securities of any series are issued in global form as permitted by
Section 304, the form thereof shall be established as provided in the preceding
sentence. A copy of the Board Resolution establishing the forms of Securities or
coupons of any series (or any such temporary global Security) shall be certified
by the Secretary or an Assistant Secretary of the Company and delivered to the
Trustee at or prior to the delivery of the Company Order contemplated by Section
303 for the authentication and delivery of such Securities (or any such
temporary global Security) or coupons.

     Unless otherwise specified as contemplated by Section 301, Securities in
bearer form shall have interest coupons attached.

     The definitive Securities and coupons, if any, shall be typed, printed,
lithographed or engraved 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 or coupons.

                                       13

<PAGE>   20

     SECTION 202. FORM OF TRUSTEE'S CERTIFICATE OF AUTHENTICATION.

     The Trustee's certificates of authentication shall be in substantially the
following form:

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

                                       ---------------------------------,
                                       as Trustee

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

     SECTION 203. SECURITIES IN GLOBAL FORM; CERTAIN BOOK-ENTRY PROVISIONS.

     If Securities of a series are issuable in global form, as specified as
contemplated by Section 301, then, notwithstanding clause (10) of Section 301
and the provisions of Section 302, any such Security shall represent such of the
Outstanding Securities of such series as shall be specified therein and may
provide that it shall represent the aggregate amount of Outstanding Securities
from time to time endorsed thereon and that the aggregate amount of Outstanding
Securities represented thereby may be reduced or increased, as appropriate, to
reflect exchanges or redemptions. Any endorsement of a Security in global form
to reflect the amount, or any increase or decrease in the amount, of Outstanding
Securities represented thereby shall be made by the Trustee (i) in such manner
and upon instructions given by such Person or Persons as shall be specified
therein or in the Company Order to be delivered to the Trustee pursuant to
Section 303 or Section 304 or (ii) otherwise in accordance with written
instructions as is customary for the Depositary for such Security, from such
Depositary or its nominee on behalf of any Person having a beneficial interest
in such global Security. Subject to the provisions of Section 303 and, if
applicable, Section 304, the Trustee shall deliver and redeliver any Security in
permanent global form in the manner and upon instructions given by the Person or
Persons specified therein or in the applicable Company Order. With respect to
the Securities of any series that are represented by a Book-Entry Security, the
Company authorizes the execution and delivery by the Trustee of a letter of
representations or other similar agreement or instrument in the form customarily
provided for by the Depositary appointed with respect to such Security. Any
Book-Entry Security may be deposited with the Depositary or its nominee, or
remain in the custody of the trustee or the Security Custodian therefor pursuant
to a FAST Balance Certificate Agreement or similar agreement between the Trustee
and the Depositary. If a Company Order pursuant to Section 303 or 304 has been,
or simultaneously is, delivered, any instructions by the Company with respect to
endorsement or delivery or redelivery of a Security in global form shall be in
writing but need not comply with Section 1701 and need not be accompanied by an
Opinion of Counsel.

                                       14

<PAGE>   21

     The provisions of the last sentence of Section 303 shall apply to any
Security represented by a Security in global form if such Security was never
issued and sold by the Company and the Company delivers to the Trustee the
Security in global form together with written instructions (which need not
comply with Section 1701 and need not be accompanied by an Opinion of Counsel)
with regard to the reduction in the principal amount of Securities represented
thereby, together with the written statement contemplated by the last sentence
of Section 303.

     Notwithstanding the provisions of Sections 201 and 307, unless otherwise
specified as contemplated by Section 301, payment of principal of and any
premium and interest on any Security in permanent global form shall be made to
the Person or Persons specified therein.

     SECTION 204. FORM OF LEGEND FOR BOOK-ENTRY SECURITIES.

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

     "This Security is a Book-Entry Security within the meaning of the Indenture
hereinafter referred to and is registered in the name of a Depositary or a
nominee of a Depositary. This Security is exchangeable for Securities registered
in the name of a Person other than the Depositary or its nominee only in the
limited circumstances described in the Indenture, and no transfer of this
Security (other than a transfer of this Security as a whole by the Depositary to
a 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 nominee thereof
to a successor Depositary or any nominee of such successor Depositary) may be
registered except in such limited circumstances."

                          ARTICLE THREE THE SECURITIES

     SECTION 301. 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 from time to time in one or more series. There
shall be established in or pursuant to a Board Resolution and, subject to
Section 303, set forth, or determined in the manner provided, in an Officers'
Certificate, or established in one or more indentures supplemental hereto, prior
to the issuance of Securities of any series:

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

          (2) any limit upon the aggregate principal amount of the Securities of
     the series which may be authenticated and delivered under this Indenture
     (except for Securities authenticated and delivered upon registration of
     transfer of, or in exchange for, or in lieu of, other Securities of the
     series pursuant to Section 304, 305, 306, 906 or 1107

                                       15

<PAGE>   22

     and except for any Securities which, pursuant to Section 303, are deemed
     never to have been authenticated and delivered hereunder);

          (3) whether Securities of the series are to be issuable as Registered
     Securities, Bearer Securities or both, whether any Securities of the series
     are to be issuable initially in temporary global form and whether any
     Securities of the series are to be issuable in permanent global form with
     or without coupons and, if so, whether beneficial owners of interests in
     any such permanent global Security may exchange such interests for
     Securities of such series and of like tenor of any authorized form and
     denomination and the circumstances under which any such exchanges may
     occur, if other than in the manner provided in Section 305;

          (4) the Person to whom any interest on any Registered Security of the
     series shall be payable, if other than the Person in whose name that
     Security (or one or more Predecessor Securities) is registered at the close
     of business on the Regular Record Date for such interest, the manner in
     which, or the Person to whom, any interest on any Bearer Security of the
     series shall be payable, if otherwise than upon presentation and surrender
     of the coupons appertaining thereto as they severally mature and the extent
     to which, or the manner in which, any interest payable on a temporary
     global Security on an Interest Payment Date will be paid if other than in
     the manner provided in Section 304;

          (5) the date or dates on which the principal of and premium, if any,
     on the Securities of the series is payable or the method of determination
     thereof;

          (6) the rate or rates at which the Securities of the series shall bear
     interest, if any, or the method by which such rate or rates shall be
     determined, the date or dates from which any such interest shall accrue,
     the Interest Payment Dates on which any such interest shall be payable, and
     the Regular Record Date for any interest payable on any Registered
     Securities on any Interest Payment Date and whether, and under what
     circumstances, additional amounts with respect to such Securities shall be
     payable as set forth in Section 1004;

          (7) the place or places where, subject to the provisions of Section
     1002, the principal of and any premium and interest on Securities of the
     series shall be payable, any Registered Securities of the series may be
     surrendered for registration of transfer, Securities of the series may be
     surrendered for exchange or conversion and notices and demands to or upon
     the Company in respect of the Securities of the series and this Indenture
     may be served;

          (8) the right, if any, of the Company to redeem Securities of the
     series, in whole or in part, at its option and the period or periods within
     which, the price or prices at which and the terms and conditions upon which
     Securities of the series may be so redeemed;

                                       16

<PAGE>   23

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

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

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

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

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

          (14) if the principal of and any premium or interest on the Securities
     of the series are to be payable, at the election of the Company or a Holder
     thereof, in a currency or currencies, including composite currencies, other
     than that or those in which the Securities are stated to be payable, the
     currency or currencies in which payment of the principal of and any premium
     and interest on Securities of such series as to which such election is made
     shall be payable, and the periods within which and the terms and conditions
     upon which such election is to be made and the amount so payable (or the
     manner in which such amount shall be determined);

          (15) whether the Securities of the series shall be issued upon
     original issuance in whole or in part in the form of one or more Book-Entry
     Securities and, in such case, (a) the Depositary with respect to such
     Book-Entry Security or Securities; and (b) the circumstances under which
     any such Book-Entry Security may be exchanged for Securities registered in
     the name of, and any transfer of such Book-Entry Security may be registered
     to, a Person other than such Depositary or its nominee, if other than as
     set forth in Section 305;

          (16) if either or both of the provisions of Section 1302 or 1303 are
     applicable to the Securities of such series, in whole or any specified
     part, and any additional means of

                                       17

<PAGE>   24

     discharge pursuant to Section 1302 or 1303 and any additional conditions to
     the provisions of Section 1302 or 1303;

          (17) any applicability of, and any additions to, deletion from or
     change in Events of Default with respect to the Securities of such series
     and any change in the right of the Trustee or the requisite Holders of such
     Securities to declare the principal amount thereof due and payable pursuant
     to Section 502;

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

          (19) the applicability of, and any addition to, change in or
     limitation on, the covenants set forth in Article Ten and the definitions
     set forth in Section 101 that apply to Securities of the series;

          (20) any restriction or condition on the transferability of the
     Securities; and

          (21) whether the Securities of the series will be convertible into
     Common Stock, Preferred Stock or other securities of the Company (or cash
     in lieu of any thereof) and, if so, the terms and conditions upon which
     such conversion will be effected including the initial Conversion Price and
     any adjustments thereto in addition to or different from those set forth in
     Section 1504, the conversion period and other provisions in addition to or
     in lieu of those set forth herein;

          (22) any subordination provisions with respect to the Securities of
     such series in addition to or in lieu of those set forth in Article Sixteen
     hereof; and

          (23) the rights, if any, to defer payments of interest on any
     Securities of the series by extending the interest payment period, and the
     duration of such extensions;

          (24) any other terms of the series (which terms shall not be
     inconsistent with the provisions of this Indenture except as permitted by
     Section 901(8)).

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

                                       18

<PAGE>   25

     All Securities of any one series need not be issued at the same time and,
unless otherwise provided, a series may be reopened, without the consent of the
Holders, for issuances of additional Securities of such series.

     If any of the terms of the series are established by action taken pursuant
to a Board Resolution, a copy of an appropriate record of such action shall be
certified by the Secretary or an Assistant Secretary of the Company and
delivered to the Trustee at or prior to the delivery of the Officers'
Certificate setting forth, or providing the manner for determining, the terms of
the series.

     SECTION 302. DENOMINATIONS.

     Unless otherwise provided as contemplated by Section 301 with respect to
any series of Securities, any Registered Securities of a series shall be
issuable in denominations of $1,000 and any integral multiple thereof and any
Bearer Securities of a series shall be issuable in the denomination of $5,000.

     SECTION 303. EXECUTION, AUTHENTICATION, DELIVERY AND DATING.

     The Securities shall be executed on behalf of the Company by its Chief
Executive Officer, its President, its Treasurer, or a Vice President of the
Company, attested by its Secretary or one of its Assistant Secretaries under its
corporate seal impressed, imprinted or reproduced thereon. The signature of any
of these officers on the Securities may be manual or facsimile. Coupons shall
bear the facsimile signature of the Chief Financial Officer, the Treasurer or
any Assistant Treasurer of the Company.

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

     At any time and from time to time after the execution and delivery of this
Indenture, the Company may deliver Securities of any series, together with any
coupons appertaining thereto, executed by the Company to the Trustee for
authentication, together with a Company Order for the authentication and
delivery of such Securities, and the Trustee in accordance with the Company
Order and, subject to the provisions hereof, shall authenticate and deliver such
Securities; provided, however, that, (i) in the case of Securities of a series
that are not to be originally issued at one time, the Trustee shall authenticate
and deliver or make available for delivery such Securities from time to time in
accordance with such other procedures (including, without limitation, the
receipt by the Trustee of oral or electronic instructions from the Company or
its duly authorized agents, promptly confirmed in writing) acceptable to the
Trustee as may be specified by or pursuant to a Company Order delivered to the
Trustee prior to the time of the first authentication of Securities of such
series, and (ii) unless otherwise provided with respect to such series, in
connection with its original issuance, no Bearer Security shall be mailed or
otherwise delivered to any location in the United States; and provided, further,
that, unless otherwise

                                       19

<PAGE>   26

provided with respect to such series, a Bearer Security may be delivered in
connection with its original issuance only if the Person entitled to receive
such Bearer Security shall have furnished a certificate in the form set forth in
Exhibit A to this Indenture, dated no earlier than the Certification Date. If
any Security shall be represented by a permanent global Bearer Security, then,
for purposes of this Section and Section 304, the notation of a beneficial
owner's interest therein upon original issuance of such Security or upon
exchange of a portion of a temporary global Security shall be deemed to be
delivery in connection with its original issuance of such beneficial owner's
interest in such permanent global Security. Except as permitted by Section 306,
the Trustee shall not authenticate and deliver any Bearer Security unless all
appurtenant coupons for interest then matured have been detached and canceled.

     If the form or terms of the Securities of the series have been established
by or pursuant to one or more Board Resolutions as permitted by Sections 201 and
301, in authenticating such Securities, and accepting the additional
responsibilities under this Indenture in relation to such Securities, the
Trustee shall be entitled to receive, and (subject to Section 601) shall be
fully protected in relying upon, an Opinion of Counsel stating,

          (1) that the forms of such Securities and coupons established by or
     pursuant to a Board Resolution as permitted by Section 201 have been
     established in conformity with the provisions of this Indenture;

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

          (3) that such Securities, together with any coupons appertaining
     thereto, when authenticated and delivered by the Trustee and issued by the
     Company in the manner and subject to any conditions specified in such
     Opinion of Counsel, will constitute valid and legally binding obligations
     of the Company enforceable in accordance with their terms, subject to
     bankruptcy, insolvency, fraudulent transfer, reorganization, moratorium and
     similar laws of general applicability relating to or affecting creditors'
     rights and to general equity principles; provided, that such Opinion of
     Counsel need express no opinion as to whether a court in the United States
     would render a money judgment in currency other than that of the United
     States.

     The Trustee shall not be required to authenticate such Securities the forms
or terms of which have been established by or pursuant to a Board Resolution if
the issue of such Securities pursuant to this Indenture will affect the
Trustee's own rights, duties or immunities under the Securities and this
Indenture or otherwise in a manner which is not reasonably acceptable to the
Trustee.

     Notwithstanding the provisions of Section 301 and of the two preceding
paragraphs, if all Securities of a series are not to be originally issued at one
time, it shall not be necessary to deliver the Officers' Certificate otherwise
required pursuant to Section 301 or the Company Order and Opinion of Counsel
otherwise required pursuant to such preceding paragraphs at or

                                       20

<PAGE>   27

prior to the time of authentication of each Security of such series if such
documents are delivered at or prior to the authentication upon issuance of the
first Security of such series to be issued.

     After the original issuance of the first Security of such series to be
issued, any separate request by the Company that the Trustee authenticate
Securities of such series for original issuance will be deemed to be a
certification by the Company (which, subject to Section 601, the Trustee shall
be fully protected in relying on) that it is in compliance with all conditions
precedent provided for in this Indenture relating to the authentication and
delivery of such Securities.

     Each Registered Security shall be dated the date of its authentication; and
each Bearer Security shall be dated as of the date of original issuance of the
first Security of such series to be issued.

     No Security or coupon shall be entitled to any benefit under this Indenture
or be valid or obligatory for any purpose unless there appears on such Security,
or the Security to which such coupon appertains, a certificate of authentication
substantially in the form provided for herein executed by or on behalf of the
Trustee by manual signature of one of its authorized signatories or by the
Authenticating Agent, and such certificate upon any Security shall be conclusive
evidence, and the only evidence, that such Security has been duly authenticated
and delivered hereunder. Notwithstanding the foregoing, if any Security shall
have been authenticated and delivered hereunder but never issued and sold by the
Company, and the Company shall deliver such Security to the Trustee for
cancellation as provided in Section 309 together with a written statement (which
need not comply with Section 1701 and need not be accompanied by an Opinion of
Counsel) stating that such Security has never been issued and sold by the
Company, for all purposes of this Indenture such Security shall be deemed never
to have been authenticated and delivered hereunder and shall never be entitled
to the benefits of this Indenture.

     SECTION 304. TEMPORARY SECURITIES.

     Pending the preparation of definitive Securities of any series, the Company
may execute, and upon Company Order the Trustee shall authenticate and deliver,
temporary Securities which are printed, lithographed, typewritten, mimeographed
or otherwise produced, in any authorized denomination, substantially of the
tenor of the definitive Securities in lieu of which they are issued, in
registered form or, if authorized, in bearer form with one or more coupons or
without coupons, and with such appropriate insertions, omissions, substitutions
and other variations as the officers executing such Securities may determine, as
evidenced by their execution of such Securities. In the case of any series
issuable as Bearer Securities, such temporary Securities may be in global form.
A temporary Bearer Security shall be delivered only in compliance with the
conditions set forth in Section 303.

     Except in the case of temporary Securities in global form (which shall be
exchanged in accordance with the provisions of the following paragraphs), if
temporary Securities of any series are issued, the Company will cause definitive
Securities of that series to be prepared without unreasonable delay. After the
preparation of definitive Securities of such series, the temporary

                                       21

<PAGE>   28

Securities of such series shall be exchangeable for definitive Securities of
such series upon surrender of the temporary Securities of such series at the
office or agency of the Company maintained pursuant to Section 1002 in a Place
of Payment for such series for the purpose of exchanges of Securities of such
series without charge to the Holder. Upon surrender for cancellation of any one
or more temporary Securities of any series (accompanied by any unmatured coupons
appertaining thereto) the Company shall execute and the Trustee shall
authenticate and deliver in exchange therefor a like aggregate principal amount
of definitive Securities of the same series and of like tenor of authorized
denominations; provided, however, that no definitive Bearer Security shall be
issued in exchange for a temporary Registered Security.

     If temporary Securities of any series are issued in global form, any such
temporary global Security shall, unless otherwise provided therein, be delivered
to the London office of a depositary or common depositary (the "Common
Depositary"), for the benefit of Euro-clear and CEDEL S.A., for credit to the
respective accounts of the beneficial owners of such Securities (or to such
other accounts as they may direct).

     Without unnecessary delay but in any event not later than the date
specified in, or determined pursuant to the terms of, any such temporary global
Security of a series (the "Exchange Date"), the Company shall deliver to the
Trustee definitive Securities of that series in aggregate principal amount equal
to the principal amount of such temporary global Security, executed by the
Company. On or after the Exchange Date such temporary global Security shall be
surrendered by the Common Depositary to the Trustee, as the Company's agent for
such purpose, to be exchanged, in whole or from time to time in part, for
definitive Securities of that series without charge and the Trustee shall
authenticate and deliver, in exchange for each portion of such temporary global
Security, a like aggregate principal amount of definitive Securities of the same
series of authorized denominations and of like tenor as the portion of such
temporary global Security to be exchanged; provided, however, that, unless
otherwise specified in such temporary global Security, upon such presentation by
the Common Depositary, such temporary global Security is accompanied by a
certificate dated the Exchange Date or a subsequent date and signed by
Euro-clear as to the portion of such temporary global Security held for its
account then to be exchanged and a certificate dated the Exchange Date or a
subsequent date and signed by CEDEL S.A. as to the portion of such temporary
global Security held for its account then to be exchanged, each in the form set
forth in Exhibit B to this Indenture. The definitive Securities to be delivered
in exchange for any such temporary global Security shall be in bearer form,
registered form, permanent global bearer form or permanent global registered
form, or any combination thereof, as specified as contemplated by Section 301,
and if any combination thereof is so specified, as requested by the beneficial
owner thereof; provided, however, that no definitive Bearer Security or
permanent global Security shall be delivered in exchange for a temporary Bearer
Security except in compliance with the conditions set forth in Section 303.

     Unless otherwise specified in the temporary global Security, the interest
of a beneficial owner of Securities of a series in a temporary global Security
shall be exchanged on the Exchange Date for definitive Securities (and where the
form of the definitive Securities is not specified by the Holder for an interest
in a permanent global Security) of the same series and of

                                       22

<PAGE>   29

like tenor unless, on or prior to the Exchange Date, such beneficial owner has
not delivered to Euro-clear or CEDEL S.A., as the case may be, a certificate in
the form set forth in Exhibit A to this Indenture dated no earlier than the
Certification Date, copies of which certificate shall be available from the
offices of Euro-clear and CEDEL S.A., the Trustee, any Authenticating Agent
appointed for such series of Securities and each Paying Agent and after the
Exchange Date, the interest of a beneficial owner of Securities of a series in a
temporary global Security shall be exchanged for definitive Securities (and
where the form of the definitive Securities is not specified by the Holder for
an interest in a permanent global Security) of the same series and of like tenor
following such beneficial owner's delivery to Euro-clear or CEDEL S.A., as the
case may be, of a certificate in the form set forth in Exhibit A to this
Indenture dated no earlier than the Certification Date. Unless otherwise
specified in such temporary global Security, any exchange shall be made free of
charge to the beneficial owners of such temporary global Security, except that a
Person receiving definitive Securities must bear the cost of insurance, postage,
transportation and the like in the event that such Person does not take delivery
of such definitive Securities in person at the offices of Euro-clear or CEDEL
S.A. Definitive Securities in bearer form to be delivered in exchange for any
portion of a temporary global Security shall be delivered only outside the
United States.

     Until exchanged in full as hereinabove provided, the temporary Securities
of any series shall in all respects be entitled to the same benefits under this
Indenture as definitive Securities of the same series and of like tenor
authenticated and delivered hereunder, except that, unless otherwise specified
as contemplated by Section 301, interest payable on a temporary global Security
on an Interest Payment Date for Securities of such series shall be payable to
Euro-clear and CEDEL S.A. on such Interest Payment Date upon delivery by
Euro-clear and CEDEL S.A. to the Trustee of a certificate or certificates in the
form set forth in Exhibit B to this Indenture, for credit without further
interest on or after such Interest Payment Date to the respective accounts of
the Persons who are the beneficial owners of such temporary global Security on
such Interest Payment Date and who have each delivered to Euro-clear or CEDEL
S.A., as the case may be, a certificate in the form set forth in Exhibit A to
this Indenture. Any interest so received by Euro-clear and CEDEL S.A. and not
paid as herein provided shall be returned to the Trustee immediately prior to
the expiration of two years after such Interest Payment Date in order to be
repaid to the Company in accordance with Section 1003.

     SECTION 305. REGISTRATION, REGISTRATION OF TRANSFER AND EXCHANGE.

     The Company shall cause to be kept at an office or agency to be maintained
by the Company in accordance with Section 1002 a register (being the combined
register of the Security Registrar and all transfer agents designated pursuant
to Section 1002 for the purpose of registration of transfer of Securities and
sometimes collectively referred to as the "Security Register") in which, subject
to such reasonable regulations as it may prescribe, the Company shall provide
for the registration of each series of Registered Securities and the
registration of transfers of such Registered Securities. The Trustee shall serve
initially as "Security Registrar" for the purpose of registering Registered
Securities and transfers of Registered Securities as herein provided. In the
event the Trustee shall cease to be Security Registrar, it shall have the right
to examine at all times the Security Register.

                                       23

<PAGE>   30

     Upon surrender for registration of transfer of any Registered Security of
any series at the office or agency of the Company maintained pursuant to Section
1002 for such purpose in a Place of Payment for such series, the Company shall
execute, and the Trustee shall authenticate and deliver, in the name of the
designated transferee or transferees, one or more new Registered Securities of
the same series of any authorized denominations and of a like tenor and
aggregate principal amount.

     Furthermore, any Holder of a Security in global form shall, by acceptance
of such Security in global form, be deemed to have agreed that transfers of
beneficial interests in such Security in Form may be effected only through a
book-entry system maintained by the Depositary (or its agent), and that
ownership of a beneficial interest in a Security in global form shall be
required to be reflected in a book entry.

     At the option of the Holder, Registered Securities of any series may be
exchanged for other Registered Securities of the same series of any authorized
denominations and of a like tenor and aggregate principal amount, upon surrender
of the Securities to be exchanged at any such office or agency. Whenever any
Securities are so surrendered for exchange, the Company shall execute, and the
Trustee shall authenticate and deliver, the Securities which the Holder making
the exchange is entitled to receive. Unless otherwise provided with respect to
any series of Securities, Bearer Securities may not be issued in exchange for
Registered Securities.

     At the option of the Holder, Bearer Securities of any series may be
exchanged for Registered Securities of the same series of any authorized
denominations and of a like aggregate principal amount and tenor, upon surrender
of the Bearer Securities to be exchanged at any such office or agency, with all
unmatured coupons and all matured coupons in default thereto appertaining. If
the Holder of a Bearer Security is unable to produce any such unmatured coupon
or coupons or matured coupon or coupons in default, such exchange may be
effected if the Bearer Securities are accompanied by payment in funds acceptable
to the Company in an amount equal to the face amount of such missing coupon or
coupons, or the surrender of such missing coupon or coupons may be waived by the
Company and the Trustee if there is furnished to them such security or indemnity
as they may require to save each of them and any Paying Agent harmless. If
thereafter the Holder of such Security shall surrender to any Paying Agent any
such missing coupon in respect of which such a payment shall have been made,
such Holder shall be entitled to receive the amount of such payment; provided,
however, that, except as otherwise provided in Section 1002, interest
represented by coupons shall be payable only upon presentation and surrender of
those coupons at an office or agency located outside the United States.
Notwithstanding the foregoing, in case a Bearer Security of any series is
surrendered at any such office or agency in exchange for a Registered Security
of the same series and like tenor after the close of business at such office or
agency on (i) any Regular Record Date and before the opening of business at such
office or agency on the relevant Interest Payment Date, or (ii) any Special
Record Date and before the opening of business at such office or agency on the
related proposed date for payment of Defaulted Interest, such Bearer Security
shall be surrendered without the coupon relating to such Interest Payment Date
or proposed date for payment, as the case may be, and interest or Defaulted
Interest, as the case may be, will not be payable on such

                                       24

<PAGE>   31

Interest Payment Date or proposed date for payment, as the case may be, in
respect of the Registered Security issued in exchange for such Bearer Security
but will be payable only to the Holder of such coupon when due in accordance
with the provisions of this Indenture.

     Whenever any Securities are so surrendered for exchange, the Company shall
execute, and the Trustee shall authenticate and deliver, the Securities which
the Holder making the exchange is entitled to receive.

     Notwithstanding the foregoing, except as otherwise specified as
contemplated by Section 301, any permanent global Security shall be exchangeable
only as provided in this paragraph. If the beneficial owners of interests in a
permanent global Security are entitled to exchange such interests for Securities
of such series and of like tenor and principal amount of another authorized form
and denomination, as specified as contemplated by Section 301, then without
unnecessary delay but in any event not later than the earliest date on which
such interests may be so exchanged, the Company shall deliver to the Trustee
definitive Securities of that series in an aggregate principal amount equal to
the principal amount of such permanent global Security, executed by the Company.
On or after the earliest date on which such interests may be so exchanged, such
permanent global Security shall be surrendered from time to time in accordance
with instructions given to the Trustee and the Common Depositary (which
instructions shall be in writing but need not comply with Section 1701 or be
accompanied by an Opinion of Counsel) by the Common Depositary or such other
depositary as shall be specified in the Company Order with respect thereto to
the Trustee, as the Company's agent for such purpose, to be exchanged, in whole
or in part, for definitive Securities of the same series without charge, and the
Trustee shall authenticate and deliver, in exchange for each portion of such
permanent global Security, a like aggregate principal amount of definitive
Securities of the same series of authorized denominations and of like tenor as
the portion of such permanent global Security to be exchanged which, unless the
Securities of the series are not issuable both as Bearer Securities and as
Registered Securities, as specified as contemplated by Section 301, shall be in
the form of Bearer Securities or Registered Securities, or any combination
thereof, as shall be specified by the beneficial owner thereof; provided,
however, that no such exchanges may occur during a period beginning at the
opening of business 15 days before any selection of Securities of that series
for redemption and ending on the relevant Redemption Date; and provided,
further, that no Bearer Security delivered in exchange for a portion of a
permanent global Security shall be mailed or otherwise delivered to any location
in the United States. Promptly following any such exchange in part, such
permanent global Security shall be returned by the Trustee to the Common
Depositary or such other depositary referred to above in accordance with the
instructions of the Company referred to above. If a Registered Security is
issued in exchange for any portion of such permanent global Security after the
close of business at the office or agency where such exchange occurs on (i) any
Regular Record Date and before the opening of business at such office or agency
on the relevant Interest Payment Date, or (ii) any Special Record Date and
before the opening of business at such office or agency on the related proposed
date for payment of Defaulted Interest, interest or Defaulted Interest, as the
case may be, will not be payable on such Interest Payment Date or proposed date
for payment, as the case may be, in respect of such Registered Security, but
will be payable on such Interest Payment Date or proposed date for payment, as
the case may be, only to the Person to whom interest in respect of

                                       25

<PAGE>   32

such portion of such permanent global Security is payable in accordance with
provisions of this Indenture.

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

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

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

     Neither the Company nor the Trustee shall be required (i) to issue,
register the transfer of or exchange Securities of any series during a period
beginning at the opening of business 15 days before any selection of Securities
of that series for redemption under Section 1103 and ending at the close of
business on (A) if Securities of the series are issuable only as Registered
Securities, the day of the mailing of the relevant notice of redemption and (B)
if Securities of the series are issuable as Bearer Securities, the day of the
first publication of the relevant notice of redemption, or if Securities of the
series are also issuable as Registered Securities and there is no publication,
the mailing of the relevant notice of redemption, or (ii) to register the
transfer of or exchange any Registered Security so selected for redemption, in
whole or in part, except the unredeemed portion of any Registered Security being
redeemed in part, or (iii) to exchange any Bearer Security so selected for
redemption except that such a Bearer Security may be exchanged for a Registered
Security of that series and like tenor, provided that such Registered Security
shall be simultaneously surrendered for redemption.

     Notwithstanding the foregoing and except as otherwise specified as
contemplated by Section 301, any Book-Entry Security shall be exchangeable
pursuant to this Section 305 or Sections 304, 906 and 1107 for Securities
registered in the name of, and a transfer of a Book-Entry Security of any series
may be registered to, any Person other than the Depositary for such Security or
its nominee or a successor Depositary or its nominee only if (i) such Depositary
notifies the Company that it is unwilling or unable to continue as depositary
for such Book-Entry Security and a successor Depositary is not appointed by the
Company within ninety (90) days of such notice, or (ii) an Event of Default has
occurred with respect to such series and is continuing and the Security
Registrar has received a request from the applicable Depositary to issue
Securities in lieu of all or a portion of the Book-Entry Security (in which case
the Company shall deliver Securities within thirty (30) days of such request) or
(iii) the Company executes and delivers to the Trustee a Company Order that such
Book-Entry Security shall be so exchangeable

                                       26

<PAGE>   33

and the transfer thereof so registrable. Upon the occurrence in respect of any
Book-Entry Security of any series of any one or more of the conditions specified
in clause (i) or (ii) of the preceding sentence or such other conditions as may
be specified, such Book-Entry Security may be exchanged for Securities
registered in the names of, and the transfer of such Book-Entry Security may be
registered to, such Persons (including Persons other than the Depositary with
respect to such series and its nominees) as such Depositary shall direct.
Notwithstanding any other provision of this Indenture, any Security
authenticated and delivered upon registration of transfer of, or in exchange
for, or in lieu of, any Book-Entry Security shall also be a Book-Entry Security
and shall bear the legend specified in Section 204 except for any Security
authenticated and delivered in exchange for, or upon registration of transfer
of, a Book-Entry Security pursuant to the preceding sentence.

     In connection with any transfer of a portion of the beneficial interest in
a Book-Entry Security to beneficial owners pursuant to this Section, the
Security Registrar shall reflect on its books and records the date and a
decrease in the principal amount of the Book-Entry Security in an amount equal
to the principal amount of the beneficial interest in the Book-Entry Security to
be transferred, and the Company shall execute, and the Trustee upon receipt o a
Company Order for the authentication and delivery of the Securities shall
authenticate and deliver, one or more Securities of the same series of like
tenor and amount.

     In connection with the transfer of all the beneficial interest in a
Book-Entry Security to beneficial owners pursuant to this Section, the
Book-Entry Security shall be deemed to be surrendered to the Trustee for
cancellation, and the Company shall execute, and the Trustee shall upon Company
Order authenticate and deliver, to each beneficial owner identified by the
Depositary in exchange for its beneficial interest in the Book-Entry Security,
an equal aggregate principal amount of Securities of authorized denominations.

     SECTION 306. MUTILATED, DESTROYED, LOST AND STOLEN SECURITIES AND COUPONS.

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

     If there shall be delivered to the Company and the Trustee (i) evidence to
their satisfaction of the destruction, loss or theft of any Security or coupon
and (ii) such security or indemnity as may be required by them to save each of
them and any agent of either of them harmless, then, in the absence of notice to
the Company or the Trustee that such Security or coupon has been acquired by a
bona fide purchaser (or any equivalent person under any applicable statute, rule
or regulation or interpretation then in effect), the Company shall execute and
the Trustee shall authenticate and deliver, in lieu of any such destroyed, lost
or stolen Security or in exchange for the Security to which a destroyed, lost or
stolen coupon appertains (with all appurtenant coupons not destroyed, lost or
stolen), a new Security of the same series and of like tenor and principal
amount and bearing a number not contemporaneously outstanding,

                                       27

<PAGE>   34

with coupons corresponding to the coupons, if any, appertaining to such
destroyed, lost or stolen Security or to the Security to which such destroyed,
lost or stolen coupon appertains.

     In case any such mutilated, destroyed, lost or stolen Security or coupon
has become or is about to become due and payable or is being surrendered for
conversion in full, the Company in its discretion may, instead of issuing a new
Security, pay such Security or coupon or authorize the conversion thereof
(without surrender thereof except in the case of a mutilated Security or
coupon); provided, however, that the principal of and any premium and interest
on Bearer Securities shall, except as otherwise provided in Section 1002, be
payable only at an office or agency located outside the United States.

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

     Every new Security of any series with its coupons, if any, issued pursuant
to this Section in lieu of any destroyed, lost or stolen Security or in exchange
for a Security to which a destroyed, lost or stolen coupon appertains, shall
constitute an original additional contractual obligation of the Company, whether
or not the destroyed, lost or stolen Security and its coupons, if any, or the
destroyed, lost or stolen coupon shall be at any time enforceable by anyone, and
any such new Security and coupons, if any, shall be entitled to all the benefits
of this Indenture equally and proportionately with any and all other Securities
of that series and their coupons, if any, duly issued hereunder.

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

     SECTION 307. PAYMENT OF INTEREST; INTEREST RIGHTS PRESERVED.

     Unless otherwise provided as contemplated by Section 301 with respect to
any series of Securities, interest on any Registered Security which is payable,
and is punctually paid or duly provided for, on any Interest Payment Date shall
be paid to the Person in whose name that Security (or one or more Predecessor
Securities) is registered at the close of business on the Regular Record Date
for such interest. Unless otherwise so provided, at the option of the Company,
payment of interest on any Registered Security may be made (i) by check mailed
on or before the due date to the address of the Person entitled thereto as such
address shall appear in the Security Register or (ii) by wire transfer to an
account maintained by the Person entitled thereto as specified in the Security
Register; provided, that such Person shall have provided to the Company or the
Paying Agent wire transfer instructions at least five Business Days prior to the
applicable Interest Payment Date.

     Any interest on any Registered Security of any series which is payable, but
is not punctually paid or duly provided for, on any Interest Payment Date
(herein called "Defaulted

                                       28

<PAGE>   35

Interest") shall forthwith cease to be payable to the Holder on the relevant
Regular Record Date by virtue of having been such Holder, and such Defaulted
Interest may be paid by the Company, at its election in each case, as provided
in clause (1) or (2) below:

          (1) The Company may elect to make payment of any Defaulted Interest to
     the Persons in whose names the Registered Securities of such series (or
     their respective Predecessor Securities) are registered at the close of
     business on a Special Record Date for the payment of such Defaulted
     Interest, which shall be fixed in the following manner. The Company shall
     notify the Trustee in writing of the amount of Defaulted Interest proposed
     to be paid on each Registered Security of such series, the date of the
     proposed payment and the Special Record Date, and at the same time the
     Company shall deposit with the Trustee an amount of money equal to the
     aggregate amount proposed to be paid in respect of such Defaulted Interest
     or shall make arrangements satisfactory to the Trustee for such deposit
     prior to the date of the proposed payment, such money when deposited to be
     held in trust for the benefit of the Persons entitled to such Defaulted
     Interest as in this Clause provided. The Special Record Date for the
     payment of such Defaulted Interest shall be not more than 15 days and not
     less than 10 days prior to the date of the proposed payment and not less
     than 10 days after the receipt by the Trustee of the notice of the proposed
     payment. The Trustee, in the name and at the expense of the Company, shall
     cause notice of the proposed payment of such Defaulted Interest and the
     Special Record Date therefor to be given to each Holder of Registered
     Securities of such series at the address of such Holder as it appears in
     the Security Register, not less than 10 days prior to such Special Record
     Date. The Trustee may, in its discretion, in the name and at the expense of
     the Company cause a similar notice to be published at least once in an
     Authorized Newspaper of general circulation in each Place of Payment, but
     such publication shall not be a condition precedent to the establishment of
     such Special Record Date and the failure of a Holder to observe such
     published notice shall not entitle such Holder to additional benefits or
     interest with respect to such Holder's Securities. Notice of the proposed
     payment of such Defaulted Interest and the Special Record Date therefor
     having been so mailed, such Defaulted Interest shall be paid to the Persons
     in whose names the Registered Securities of such series (or their
     respective Predecessor Securities) are registered at the close of business
     on such Special Record Date and shall no longer be payable pursuant to the
     following clause (2).

          (2) The Company may make payment of any Defaulted Interest on the
     Registered Securities of any series in any other lawful manner not
     inconsistent with the requirements of any securities exchange on which such
     Securities may be then listed, and upon such notice as may be required by
     such exchange, if, after notice given by the Company to the Trustee of the
     proposed payment pursuant to this clause, such manner of payment shall be
     deemed practicable by the Trustee.

     Subject to the foregoing provisions of this Section and Section 305, each
Security delivered under this Indenture upon registration of transfer of or in
exchange for or in lieu of any other Security shall carry the rights to interest
accrued and unpaid, and to accrue, which were carried by such other Security.

                                       29

<PAGE>   36

     SECTION 308. PERSONS DEEMED OWNERS.

     Prior to due presentment of a Registered Security for registration of
transfer, the Company, the Trustee and any agent of the Company or the Trustee
may treat the Person in whose name such Registered Security is registered as the
owner of such Registered Security for the purpose of receiving payment of
principal of (and premium, if any) and (subject to Sections 305 and 307) any
interest on such Security and for all other purposes whatsoever, whether or not
such Security be overdue, and neither the Company, the Trustee, the Securities
Registrar nor any agent of the Company or the Trustee shall be affected by
notice to the contrary.

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

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

     No holder of any beneficial interest in any global Security held on its
behalf by a Depositary shall have any rights under this Indenture with respect
to such global Security, and such Depositary may be treated by the Company, the
Trustee, and any agent of the Company or the Trustee as the owner of such global
Security for all purposes whatsoever. None of the Company, the Trustee, any
Paying Agent or the Securities Registrar will have any responsibility or
liability for any for any aspect of the records relating to, or payments made on
account of, Securities by the Depositary, or for maintaining, supervising or
reviewing any records of the Depositary relating to such Securities. Neither the
Company nor the Trustee shall be liable for any delay by the related Book-Entry
Security Holder or the Depositary in identifying the beneficial owners, and each
such Person may conclusively rely on, and shall be protected in relying on,
instructions from such Book-Entry Security Holder or the Depositary for all
purposes (including with respect to the registration and delivery, and the
respective principal amounts, of the Securities to be issued).

     SECTION 309. CANCELLATION.

     All Securities and coupons surrendered for payment, redemption,
registration of transfer, conversion or exchange or for credit against any
sinking fund payment shall, if surrendered to any Person other than the Trustee,
be delivered to the Trustee. All Registered Securities and matured coupons so
delivered shall be promptly canceled by the Trustee. All Bearer Securities

                                       30

<PAGE>   37

and unmatured coupons so delivered shall be held by the Trustee and, upon
instruction by a Company Order, shall be canceled or held for reissuance. Bearer
Securities and unmatured coupons held for reissuance may be reissued only in
replacement of mutilated, lost, stolen or destroyed Bearer Securities of the
same series and like tenor or the related coupons pursuant to Section 306. All
Bearer Securities and unmatured coupons held by the Trustee pending such
cancellation or reissuance shall be deemed to be delivered for all purposes of
this Indenture and the Securities. The Company may at any time deliver to the
Trustee for cancellation any Securities previously authenticated and delivered
hereunder which the Company may have acquired in any manner whatsoever, and may
deliver to the Trustee (or to any other Person for delivery to the Trustee) for
cancellation any Securities previously authenticated hereunder which the Company
has not issued and sold, and all Securities so delivered shall be promptly
canceled by the Trustee. No Securities shall be authenticated in lieu of or in
exchange for any Securities canceled as provided in this Section, except as
expressly permitted by this Indenture. All canceled Securities and coupons held
by the Trustee shall be disposed of in accordance with its customary practice.

     SECTION 310. COMPUTATION OF INTEREST.

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

     SECTION 311. CUSIP NUMBERS.

     The Company in issuing any Registered 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 Registered 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 Registered Securities, and any such redemption shall not
be affected by any defect in or omission of such numbers.

                     ARTICLE FOUR SATISFACTION AND DISCHARGE

     SECTION 401. SATISFACTION AND DISCHARGE OF INDENTURE.

     This Indenture shall upon Company Request cease to be of further effect
(except as to any surviving rights of registration of transfer or exchange of
Securities herein expressly provided for, and any right to receive additional
amounts, as provided in Section 1004), and the Trustee, at the expense of the
Company, shall execute proper instruments acknowledging satisfaction and
discharge of this Indenture, when (1) either

         (A) all Securities theretofore authenticated and delivered and all
coupons, if any, appertaining thereto (other than (i) coupons appertaining to
Bearer Securities surrendered for exchange for Registered Securities and
maturing after such exchange, whose surrender is not

                                       31

<PAGE>   38

required or has been waived as provided in Section 305, (ii) Securities and
coupons which have been destroyed, lost or stolen and which have been replaced,
converted or paid as provided in Section 306, (iii) coupons appertaining to
Securities called for redemption and maturing after the relevant Redemption
Date, whose surrender has been waived as provided in Section 1106, and (iv)
Securities and coupons for whose payment money or U.S. Government Obligations
has theretofore been deposited in trust or segregated and held in trust by the
Company and thereafter repaid to the Company or discharged from such trust, as
provided in Section 1003) have been delivered to the Trustee for cancellation;
or

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

             (i) have become due and payable, or

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

             (iii) are to be called for redemption within one year under
         arrangements satisfactory to the Trustee for the giving of notice of
         redemption by the Trustee in the name, and at the expense, of the
         Company; and the Company, in the case of (i), (ii) or (iii) above, has
         deposited or caused to be deposited with the Trustee as trust funds in
         trust for the purpose an amount sufficient to pay and discharge the
         entire indebtedness on such Securities and coupons not theretofore
         delivered to the Trustee for cancellation, for principal (and premium,
         if any) and any interest to the date of such deposit (in the case of
         Securities which have become due and payable) or to the Stated Maturity
         or Redemption Date, as the case may be), together with instructions
         from the Company irrevocably directing the Trustee to apply such money
         to the payment thereof at maturity or redemption;

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

         (3) the Company has delivered to the Trustee an Officers' Certificate
     and an Opinion of Counsel, which, when taken together, state that all
     conditions precedent herein provided for relating to the satisfaction and
     discharge of this Indenture have been complied with.

     Notwithstanding the satisfaction and discharge of this Indenture, the
obligations of the Company to the Trustee under Section 606, the obligations of
the Trustee to any Authenticating Agent under Section 614 and, if money shall
have been deposited with the Trustee pursuant to clause (1)(B) of this Section,
the obligations of the Trustee under Section 402 and the last paragraph of
Section 1003 shall survive.

                                       32

<PAGE>   39

     SECTION 402. APPLICATION OF TRUST MONEY.

     Subject to the provisions of the last paragraph of Section 1003, all money
deposited with the Trustee pursuant to Section 401 shall be held in trust and
applied by it, in accordance with the provisions of the Securities, the coupons
and this Indenture, to the payment, either directly or through any Paying Agent
(including the Company acting as its own Paying Agent) as the Trustee may
determine, to the Persons entitled thereto, of the principal and any premium and
interest for whose payment such money has been deposited with the Trustee.

                              ARTICLE FIVE REMEDIES

     SECTION 501. EVENTS OF DEFAULT.

     "Event of Default", wherever used herein with respect to Securities of any
series, means any one of the following events (whatever the reason for such
Event of Default and whether it shall be voluntary or be effected by operation
of law or pursuant to any judgment, decree or order, rule or regulation of any
administrative or governmental body), unless such event is either inapplicable
to that particular series of Securities or has been specifically deleted or
modified in or pursuant to the terms of such series or in the form of Security
of such series:

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

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

          (3) default in the deposit of any sinking fund payment, when and as
     due by the terms of a Security of that series and continuance of such
     default for a period of 30 days; or

          (4) default in the performance, or breach, of any covenant of the
     Company in this Indenture (other than a covenant a default in whose
     performance or whose breach is elsewhere in this Section specifically dealt
     with or which has expressly been included in this Indenture solely for the
     benefit of a series of Securities other than that series), and continuance
     of such default or breach for a period of 90 days after there has been
     given, by registered or certified mail, to the Company by the Trustee or to
     the Company and the Trustee by the Holders of at least 25% in principal
     amount of the Outstanding Securities of that series a written notice
     specifying such default or breach and requiring it to be remedied and
     stating that such notice is a "Notice of Default" hereunder; or

          (5) the entry of a decree or order by a court having jurisdiction in
     the premises (A) for relief in respect of the Company in an involuntary
     case or proceeding under the Federal Bankruptcy Code or any other
     applicable federal or state bankruptcy, insolvency, reorganization or other
     similar law or (B) adjudging the Company bankrupt or insolvent,

                                       33

<PAGE>   40

     or approving a petition seeking reorganization, arrangement, adjustment or
     composition of the Company under the Federal Bankruptcy Code or any
     applicable federal or state law, or appointing under any such law a
     custodian, receiver, liquidator, assignee, trustee, sequestrator or other
     similar official of the Company or of a substantial part of its
     consolidated assets, or ordering the winding up or liquidation of its
     affairs, and the continuance of any such decree or order for relief or any
     such other decree or order unstayed and in effect for a period of 60
     consecutive days; or

          (6) the commencement by the Company of a voluntary case or proceeding
     under the Federal Bankruptcy Code or any applicable federal or state
     bankruptcy, insolvency, reorganization or other similar law or any other
     case or proceeding to be adjudicated a bankrupt or insolvent, or the
     consent by the Company to the entry of a decree or order for relief in
     respect thereof in an involuntary case or proceeding under the Federal
     Bankruptcy Code or any applicable federal or state bankruptcy, insolvency,
     reorganization or other similar law or to the commencement of any
     bankruptcy or insolvency case or proceeding against it, or the filing by
     the Company of a petition or consent seeking reorganization or relief under
     any applicable federal or state law, or the consent by it under any such
     law to the filing of any such petition or to the appointment of or taking
     possession by a custodian, receiver, liquidator, assignee, trustee or
     sequestrator (or other similar official) of the Company or of any
     substantial part of its consolidated assets, or the making by it of an
     assignment for the benefit of creditors under any such law, or the
     admission by it in writing of its inability to pay its debts generally as
     they become due or taking of corporate action by the Company in furtherance
     of any such action; or

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

     SECTION 502. ACCELERATION OF MATURITY; RESCISSION AND ANNULMENT.

     If an Event of Default with respect to Securities of any series at the time
Outstanding occurs and is continuing, then in every such case the Trustee or the
Holders of not less than 25% in principal amount of the Outstanding Securities
of that series may declare the principal of, premium, if any, on and accrued but
unpaid interest (or, if any of the Securities of that series are Original Issue
Discount Securities or Indexed Securities, such portion of the principal amount
of such Securities as may be specified in the terms thereof) of all of the
Securities of that series to be due and payable immediately, by a notice in
writing to the Company (and to the Trustee if given by Holders), and upon any
such declaration such principal amount (or specified amount) shall become
immediately due and payable. If an Event of Default specified in Section 501(5)
or 501(6) occurs and is continuing, the amounts described above shall become and
be immediately due and payable without any declaration, notice or other act on
the part of the Trustee or any Holder.

     At any time after such a declaration of acceleration with respect to
Securities of any series has been made and before a judgment or decree for
payment of the money due has been obtained

                                       34

<PAGE>   41

by the Trustee as hereinafter in this Article provided, the Holders of a
majority in aggregate principal amount of the Outstanding Securities of that
series, by written notice to the Company and the Trustee, may rescind and annul
such declaration and its consequences if

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

              (A) all overdue interest on all Outstanding Securities of that
          series,

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

              (C) to the extent that payment of such interest is lawful and is
          required hereunder, interest upon overdue interest and principal at
          the rate or rates prescribed therefor in such Securities (without
          duplication of any amount paid or deposited pursuant to clauses (A)
          and (B) above), and

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

          (2) the rescission would not conflict with any judgment or decree of a
     court of competent jurisdiction as certified to the Trustee by the Company;
     and

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

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

     SECTION 503. COLLECTION OF INDEBTEDNESS AND SUITS FOR ENFORCEMENT BY
TRUSTEE.

     The Company covenants that if

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

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

                                       35

<PAGE>   42

     the Company will, upon demand of the Trustee, pay to it, for the benefit of
the Holders of such Securities and coupons, the whole amount then due and
payable on such Securities and coupons for principal and any premium and
interest and, to the extent that payment of such interest shall be legally
enforceable, interest on any overdue principal and premium and on any overdue
interest, at the rate or rates prescribed therefor in such Securities and, in
addition thereto, such further amount as shall be sufficient to cover the costs
and expenses of collection, including the reasonable compensation, expenses,
disbursements and advances of the Trustee, its agents and counsel.

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

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

     SECTION 504. TRUSTEE MAY FILE PROOFS OF CLAIM.

     In case of the pendency of any receivership, insolvency, liquidation,
bankruptcy, reorganization, arrangement, adjustment, composition or other
judicial proceeding relative to the Company or any other obligor upon the
Securities, their creditors or the Property of the Company or of such other
obligor, the Trustee (irrespective of whether the principal of the Securities
shall then be due and payable as therein expressed or by declaration or
otherwise and irrespective of whether the Trustee shall have made any demand on
the Company or such other obligor for the payment of overdue principal, premium,
if any, or interest) shall be entitled and empowered, by intervention in such
proceeding or otherwise,

     (a) to file and prove a claim for the whole amount of principal, premium,
if any, and interest owing and unpaid in respect of the Securities and to file
such other papers or documents and take any other actions including
participation as a full member of any creditor or other committee as may be
necessary or advisable in order to have the claims of the Trustee (including any
claim for the reasonable compensation, expenses, disbursements and advances of
the Trustee, its agents and counsel) and of the Holders allowed in such judicial
proceeding, and

     (b) subject to Article Sixteen, to collect and receive any money or other
Property payable or deliverable on any such claims and to distribute the same;
and any custodian, receiver, assignee, trustee, liquidator, sequestrator or
other similar official in any such judicial proceeding is hereby authorized by
each Holder to make such payments to the Trustee and, in the event that

                                       36

<PAGE>   43

the Trustee shall consent to the making of such payments directly to the
Holders, to pay to the Trustee any amount due it for the reasonable
compensation, expenses, disbursements and advances of the Trustee, its agents
and counsel, and any other amounts due the Trustee under Section 606.

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

     SECTION 505. TRUSTEE MAY ENFORCE CLAIMS WITHOUT POSSESSION OF SECURITIES OR
COUPONS.

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

     SECTION 506. APPLICATION OF MONEY COLLECTED.

     Any money collected by the Trustee pursuant to this Article shall be
applied in the following order, at the date or dates fixed by the Trustee and,
in case of the distribution of such money on account of principal or any premium
or interest, upon presentation of the Securities or coupons, or both as the case
may be, and the notation thereon of the payment if only partially paid and upon
surrender thereof if fully paid:

         first: To the payment of all amounts due the Trustee under Section 606;

         second: Subject to Article Sixteen, to the payment of the amounts then
due and unpaid for principal of and any premium and interest on the Securities
and coupons in respect of which or for the benefit of which such money has been
collected, ratably, without preference or priority of any kind, according to the
amounts due and payable on such Securities and coupons for principal and any
premium and interest, respectively; and

         third: Subject to Article Sixteen, any remaining amounts shall be
repaid to the Company.

     In any case in which Securities are Outstanding that are denominated in
more than one currency and the Trustee is directed to make ratable payments
under this Section to Holders of

                                       37

<PAGE>   44

such Securities, unless otherwise provided with respect to any series of
Securities, the Trustee shall calculate the amount of such payments as follows:
(i) as of the day the Trustee collects an amount under this Article, the Trustee
shall, as to each Holder of a Security to whom an amount is due and payable
under this Section that is denominated in a foreign currency, determine that
amount in Dollars that would be obtained for the amount owing such Holder, using
the rate of exchange at which in accordance with normal banking procedures the
Trustee could purchase in The City of New York Dollars with such amount owing;
(ii) calculate the sum of all Dollar amounts determined under (i) and add
thereto any amounts due and payable in Dollars; and (iii) using the individual
amounts determined in (i) or any individual amounts due and payable in Dollars,
as the case may be, as a numerator, and the sum calculated in (ii) as a
denominator, calculate as to each Holder of a Security to whom an amount is owed
under this Section the fraction of the amount collected under this Article
payable to such Holder. Any expenses incurred by the Trustee in actually
converting amounts owing Holders of Securities denominated in a currency other
than that in which any amount is collected under this Article shall be likewise
(in accordance with this paragraph) borne ratably by all Holders of Securities
to whom amounts are payable under this Section. Any calculations done by the
Trustee shall be presumptively conclusive and binding absent manifest error.

     To the fullest extent allowed under applicable law, if for the purpose of
obtaining judgment against the Company in any court it is necessary to convert
the sum due in respect of the principal of, or premium, if any, or interest on,
the Securities of any series (the "Required Currency") into a currency in which
a judgment will be rendered (the "Judgment Currency"), the rate of exchange used
shall be the rate at which in accordance with normal banking procedures the
Trustee could purchase in The City of New York the Required Currency with the
Judgment Currency on the Business Day in The City of New York next preceding
that on which final judgment is given. Neither the Company nor the Trustee shall
be liable for any shortfall nor shall it benefit from any windfall in payments
to Holders of Securities under this Section caused by a change in exchange rates
between the time the amount of a judgment against the Company is calculated as
above and the time the Trustee converts the Judgment Currency into the Required
Currency to make payments under this Section to Holders of Securities, but
payment of such judgment shall discharge all amounts owed by the Company on the
claim or claims underlying such judgment.

     SECTION 507. LIMITATION ON SUITS.

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

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

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

                                       38

<PAGE>   45

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

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

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

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

     SECTION 508. UNCONDITIONAL RIGHT OF HOLDERS TO RECEIVE PRINCIPAL, PREMIUM
AND INTEREST.

     Notwithstanding any other provision in this Indenture (but subject to
Article Sixteen), the Holder of any Security or coupon shall have the right,
which is absolute and unconditional, to receive payment of the principal of and
any premium and (subject to Sections 305 and 307) any interest on such Security
or payment of such coupon on the respective Stated Maturities expressed in such
Security or coupon (or, in the case of redemption, on the Redemption Date) and,
if applicable, to convert such Security as provided in Article Fifteen and to
institute suit for the enforcement of any such payment or conversion right, and
such rights shall not be impaired without the consent of such Holder.

     SECTION 509. RESTORATION OF RIGHTS AND REMEDIES.

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

     SECTION 510. RIGHTS AND REMEDIES CUMULATIVE.

     Except as otherwise provided with respect to the replacement or payment of
mutilated, destroyed, lost or stolen Securities or coupons in the last paragraph
of Section 306, no right or remedy herein conferred upon or reserved to the
Trustee or to the Holders of Securities or coupons is intended to be exclusive
of any other right or remedy, and every right and remedy

                                       39

<PAGE>   46

shall, to the extent permitted by law, be cumulative and in addition to every
other right and remedy given hereunder or now or hereafter existing at law or in
equity or otherwise. The assertion or employment of any right or remedy
hereunder, or otherwise, shall not prevent the concurrent assertion or
employment of any other appropriate right or remedy.

     SECTION 511. DELAY OR OMISSION NOT WAIVER.

     No delay or omission of the Trustee or of any Holder of any Security or
coupon to exercise any right or remedy accruing upon any Event of Default shall
impair any such right or remedy or constitute a waiver of any such Event of
Default or an acquiescence therein. Every right and remedy given by this Article
or by law to the Trustee or to the Holders of Securities or coupons may be
exercised from time to time, and as often as may be deemed expedient, by the
Trustee or by the Holders of Securities or coupons, as the case may be.

     SECTION 512. CONTROL BY HOLDERS.

     The Holders of a majority in principal amount of the Outstanding Securities
of any series shall have the right to direct the time, method and place of
conducting any proceeding for any remedy available to the Trustee, or exercising
any trust or power conferred on the Trustee, with respect to the Securities of
such series, provided that

          (1) such direction shall not be in conflict with any rule of law or
     with this Indenture or involve the Trustee in personal liability or be
     unjustly prejudicial to the Holders of Securities of such series not taking
     part in such direction,

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

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

     SECTION 513. WAIVER OF PAST DEFAULTS.

     The Holders of not less than a majority in aggregate principal amount of
the Outstanding Securities of any series may on behalf of the Holders of all the
Securities of such series waive any past or existing Default or Event of Default
hereunder with respect to the Securities of such series and its consequences,
except a Default or Event of Default,

          (1) in respect of the payment of the principal of (or premium, if any,
     on) or interest on any Security of such series, or

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

                                       40

<PAGE>   47

Upon any such waiver, such Default or Event of Default shall cease to exist, and
any Event of Default arising therefrom shall be deemed to have been cured, for
every purpose of this Indenture; but no such waiver shall extend to any
subsequent or other Default or Event of Default or impair any right consequent
thereon. Any such waiver may (but need not) be given in connection with a tender
offer or exchange offer for the Securities of the series affected.

     SECTION 514. UNDERTAKING FOR COSTS.

     All parties to this Indenture agree, and each Holder of any Security by his
acceptance thereof shall be deemed to have agreed, that any court may in its
discretion require, in any suit for the enforcement of any right or remedy under
this Indenture, or in any suit against the Trustee for any action taken,
suffered or omitted by it as Trustee, the filing by any party litigant in such
suit of an undertaking to pay the costs of such suit, and that such court may in
its discretion assess reasonable costs, including reasonable attorneys' fees,
against any party litigant in such suit, having due regard to the merits and
good faith of the claims or defenses made by such party litigant; but the
provisions of this Section shall not apply to any suit instituted by the
Company, to any suit instituted by the Trustee, to any suit instituted by any
Holder, or group of Holders, holding in the aggregate more than 25% in aggregate
principal amount of the Outstanding Securities, or to any suit instituted by any
Holder for the enforcement of the payment of the principal of (premium, if any,
on) or interest on any Note on or after the respective Stated Maturities
expressed in such Security (or, in the case of redemption, on or after the
Redemption Date).

     SECTION 515. WAIVER OF STAY OR EXTENSION LAWS.

     The Company covenants (to the extent that it may lawfully do so) that it
will not at any time insist upon, plead or in any manner whatsoever claim or
take the benefit or advantage of, any stay, extension, or usury law or other law
wherever enacted, now or at any time hereafter in force, which would prohibit or
forgive the Company from paying all or any portion of the principal of (premium,
if any, on) or interest on the Securities as contemplated herein, or which may
affect the covenants or the performance of this Indenture; and (to the extent
that it may lawfully do so) the Company hereby expressly waives all benefit or
advantage of any such law, and covenants that it will not hinder, delay or
impede the execution of any power herein granted to the Trustee, but will suffer
and permit the execution of every such power as though no such law had been
enacted.

                             ARTICLE SIX THE TRUSTEE

     SECTION 601. DUTIES OF TRUSTEE.

     (a) If an Event of Default has occurred and is continuing with respect to
Securities of any series, the Trustee shall exercise 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 person would exercise or use under the circumstances
in the conduct of his own affairs.

                                       41

<PAGE>   48

     (b) Except during the continuance of an Event of Default with respect to
Securities of any series:

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

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

     (c) The Trustee may not be relieved from liability for its own negligent
action, its own negligent failure to act or its own willful misconduct, except
that:

          (i) this paragraph shall not limit the effect of Section 601(b);

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

          (iii) the Trustee shall not be liable with respect to any action it
     takes or omits to take in good faith in accordance with a direction
     received by it pursuant to Section 512.

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

     SECTION 602. CERTAIN RIGHTS OF TRUSTEE.

     Subject to the provisions of Section 601:

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

          (2) any request or direction of the Company mentioned herein shall be
     sufficiently evidenced by a Company Request or Company Order and any
     resolution of the Board of Directors shall be sufficiently evidenced by a
     Board Resolution;

                                       42

<PAGE>   49

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

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

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

          (6) the Trustee shall not be bound to make any investigation into the
     facts or matters stated in any resolution, certificate, statement,
     instrument, opinion, report, notice, request, direction, consent, order,
     bond, debenture, note, other evidence of indebtedness or other paper or
     document, but the Trustee, in its discretion, may make such further inquiry
     or investigation into such facts or matters as it may reasonably see fit,
     and, if the Trustee shall determine to make such further inquiry or
     investigation, it shall be entitled to examine, during business hours and
     upon reasonable notice, the books, records and premises of the Company,
     personally or by agent or attorney; and

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

     The Trustee shall not be required to advance, expend or risk its own funds
or otherwise incur any financial liability in the performance of any of its
duties hereunder, or in the exercise of any of its rights or powers if it shall
have reasonable grounds for believing that repayment of such funds or adequate
indemnity against such risk or liability is not reasonably assured to it.

     SECTION 603. TRUSTEE NOT RESPONSIBLE FOR RECITALS OR ISSUANCE OF
SECURITIES.

     The recitals contained herein and in the Securities (except the Trustee's
certificates of authentication) and in any coupons shall be taken as the
statements of the Company, and neither the Trustee nor any Authenticating Agent
assumes any responsibility for their correctness. The Trustee makes no
representations as to the validity or sufficiency of this Indenture or of the
Securities or coupons, except that the Trustee represents that it is duly
authorized to execute and deliver this Indenture, authenticate the Securities
and perform its obligations hereunder and that the statements made by it in a
Statement of Eligibility and Qualification on Form T-1 supplied to

                                       43

<PAGE>   50

the Company are true and accurate subject to the qualifications set forth
therein. Neither the Trustee nor any Authenticating Agent shall be accountable
for the use or application by the Company of any Securities or the proceeds
thereof.

     SECTION 604. MAY HOLD SECURITIES.

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

     SECTION 605. MONEY HELD IN TRUST.

     Except as provided in Section 402 and Section 1003, money held by the
Trustee in trust hereunder need not be segregated from other funds except to the
extent required by law. The Trustee shall be under no liability for interest on
any money received by it hereunder except as otherwise agreed with the Company.
So long as no Event of Default shall have occurred and be continuing, all
interest allowed on any such money shall be paid from time to time upon receipt
by the Trustee of a Company Order except as otherwise provided in this
Indenture.

     SECTION 606. COMPENSATION AND REIMBURSEMENT.

     The Company agrees

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

          (2) except as otherwise expressly provided herein, to reimburse the
     Trustee upon its request for all reasonable costs, expenses, disbursements
     and advances incurred or made by the Trustee in accordance with any
     provision of this Indenture (including the reasonable compensation and the
     expenses and disbursements of its agents and counsel), except any such
     expense, disbursement or advance as may be attributable to the Trustee's
     willful misconduct, negligence or bad faith; and

          (3) to indemnify the Trustee and its agents for, and to hold it
     harmless against, any and all loss, liability or expense incurred without
     negligence or bad faith on their part arising out of or in connection with
     the acceptance or administration of this trust, including the costs and
     expenses of defending themselves against any claim or liability in
     connection with the exercise or performance of any of their powers or
     duties hereunder.

     As security for the performance of the obligations of the Company under
this Section, the Trustee shall have a lien prior to the Securities upon all
money and other property held or

                                       44

<PAGE>   51

collected by the Trustee as such, except money and other property held in trust
for the payment of principal of (premium, if any, on) and interest on the
Securities.

     The obligations of the Company under this Section to compensate the Trustee
and each predecessor Trustee, to pay or reimburse the Trustee and each
predecessor Trustee for expenses, disbursements and advances and to indemnify
and hold harmless the Trustee shall constitute an additional obligation
hereunder and shall survive the satisfaction and discharge of this Indenture and
the resignation or removal of the Trustee and each predecessor Trustee.

     When the Trustee incurs expenses or renders services in connection with an
Event of Default specified in Section 501(5) or Section 501(6), such expenses
(including the reasonable compensation, expenses and disbursements of its
counsel) and the compensation for the services are intended to constitute
expenses of administration under any applicable federal or state bankruptcy,
insolvency or other similar law. The obligations of the Company under this
Section shall not be subordinated to the payment of Senior Indebtedness pursuant
to Article Sixteen.

     SECTION 607. CORPORATE TRUSTEE REQUIRED; ELIGIBILITY.

     There shall at all times be a Trustee hereunder that is a corporation
organized and doing business under the laws of the United States, authorized
under such laws to exercise corporate trust powers, or any other Person
permitted by the Trust Indenture Act to act as trustee under an indenture
qualified under the Trust Indenture Act and that has a combined capital and
surplus (computed in accordance with Section 310(a)(2) of the Trust Indenture
Act) of at least $10,000,000. If at any time the Trustee shall cease to be
eligible in accordance with the provisions of this Section, it shall resign
immediately in the manner and with the effect hereinafter specified in this
Article.

     SECTION 608. DISQUALIFICATION; CONFLICTING INTERESTS.

     If the Trustee has or shall acquire a conflicting interest within the
meaning of the Trust Indenture Act, the Trustee shall either eliminate such
interest or resign, to the extent and in the manner provided by, and subject to
the provisions of, the Trust Indenture Act and this Indenture. To the extent
permitted by the Trust Indenture Act, the Trustee shall not be deemed to have a
conflicting interest by virtue of being a trustee under this (1) Indenture with
respect to Securities of more than one series, (2) any other indenture or
indentures under which other securities or certificates of interest or
participation in other securities of the Company are outstanding.

     SECTION 609. RESIGNATION AND REMOVAL; APPOINTMENT OF SUCCESSOR.

     (a) No resignation or removal of the Trustee and no appointment of a
successor Trustee pursuant to this Article shall become effective until the
acceptance of appointment by the successor Trustee in accordance with the
applicable requirements of Section 610.

     (b) The Trustee may resign at any time by giving written notice thereof to
the Company. If the instrument of acceptance by a successor Trustee required by
Section 610 hereof

                                       45

<PAGE>   52

shall not have been delivered to the Trustee within 30 days after the giving of
such notice of resignation, the resigning Trustee may petition any court of
competent jurisdiction for the appointment of a successor Trustee.

     (c) The Trustee may be removed at any time with respect to the Securities
of any series by Act of the Holders of not less than a majority in aggregate
principal amount of the Outstanding Securities of such series delivered to the
Trustee and to the Company.

     (d) If at any time:

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

          (2) the Trustee shall cease to be eligible under Section 607 and shall
     fail to resign after written request therefor by the Company or by any
     Holder who has been a bona fide Holder of a Security for at least six
     months, or

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

then, in any such case,

               (A) the Company by a Board Resolution may remove the Trustee with
          respect to all Securities, or

               (B) subject to TIA Section 315(e), any Holder who has been a bona
          fide Holder of a Security for at least six months may, on behalf of
          himself and all others similarly situated, petition any court of
          competent jurisdiction for the removal of the Trustee with respect to
          all Securities and the appointment of a successor Trustee or Trustees.

     (e) If the Trustee shall resign, be removed or become incapable of acting,
or if a vacancy shall occur in the office of the Trustee for any cause, with
respect to the Securities of one or more series, the Company, by a Board
Resolution, shall promptly appoint a successor Trustee or Trustees with respect
to the Securities of that or those series (it being understood that any such
successor Trustee may be appointed with respect to the Securities of one or more
or all of such series and that at any time there shall be only one Trustee with
respect to the Securities of any particular series) and shall comply with the
applicable requirements of Section 610. If, within one year after such
resignation, removal or incapability, or the occurrence of such vacancy, a
successor Trustee with respect to the Securities of any series shall be
appointed by Act of the Holders of a majority in aggregate principal amount of
the Outstanding Securities of such series delivered to the Company and the
retiring Trustee, the successor Trustee so appointed

                                       46

<PAGE>   53

shall, forthwith upon its acceptance of such appointment in accordance with the
applicable requirements of Section 610, become the successor Trustee with
respect to the Securities of such series and to that extent supersede the
successor Trustee appointed by the Company. If no successor Trustee with respect
to the Securities of any series shall have been so appointed by the Company or
the Holders and accepted appointment in the manner required by Section 610, any
Holder who has been a bona fide Holder of a Security of such series for at least
six months may, on behalf of himself and all others similarly situated, petition
any court of competent jurisdiction for the appointment of a successor Trustee
with respect to the Securities of such series. The evidence of such
successorship may, but need not be, evidenced by a supplemental indenture.

     (f) The Company shall give notice of each resignation and each removal of
the Trustee to the Holders of Securities of any series and each appointment of a
successor Trustee with respect to the Securities of any series in the manner
provided for in Section 1505. Each notice shall include the name of the
successor Trustee with respect to the Securities of such series and the address
of its Corporate Trust Office.

     SECTION 610. ACCEPTANCE OF APPOINTMENT BY SUCCESSOR.

     (a) In case of the appointment hereunder of a successor Trustee with
respect to all Securities, every such successor Trustee so appointed shall
execute, acknowledge and deliver to the Company and to the retiring Trustee an
instrument accepting such appointment, and thereupon the resignation or removal
of the retiring Trustee shall become effective and such successor Trustee,
without any further act, deed or conveyance, shall become vested with all the
rights, powers, trusts and duties of the retiring Trustee but on the request of
the Company or the successor Trustee, such retiring Trustee shall, upon payment
of all amounts due it under Section 606, execute and deliver an instrument
transferring to such successor Trustee all the rights, powers and trusts of the
retiring Trustee and shall duly assign, transfer and deliver to such successor
Trustee all property and money held by such retiring Trustee hereunder.

     (b) In case of the appointment hereunder of a successor Trustee with
respect to the Securities of one or more (but not all) series, the Company, the
retiring Trustee and each successor Trustee with respect to the Securities of
one or more series shall execute and deliver an indenture supplemental hereto
wherein each successor Trustee shall accept such appointment and which (1) shall
contain such provisions as shall be necessary or desirable to transfer and
confirm to, and to vest in, each successor Trustee all the rights, powers,
trusts and duties of the retiring Trustee with respect to the Securities of that
or those series to which the appointment of such successor Trustee relates, (2)
if the retiring Trustee is not retiring with respect to all Securities, shall
contain such provisions as shall be deemed necessary or desirable to confirm
that all the rights, powers, trusts and duties of the retiring Trustee with
respect to the Securities of that or those series as to which the retiring
Trustee is not retiring shall continue to be vested in the retiring Trustee, and
(3) shall add to or change any of the provisions of this Indenture as shall be
necessary to provide for or facilitate the administration of the trusts
hereunder by more than one Trustee, it being understood that nothing herein or
in such supplemental indenture shall constitute such Trustees co-trustees of the
same trust and that each such Trustee shall be trustee of a trust or trusts
hereunder separate and apart from any trust or trusts hereunder administered

                                       47

<PAGE>   54

by any other such Trustee; and upon the execution and delivery of such
supplemental indenture the resignation or removal of the retiring Trustee shall
become effective to the extent provided therein and each such successor Trustee,
without any further act, deed or conveyance, shall become vested with all the
rights, powers, trusts and duties of the retiring Trustee with respect to the
Securities of that or those series to which the appointment of such successor
Trustee relates; but, on request of the Company or any successor Trustee, such
retiring Trustee shall duly assign, transfer and deliver to such successor
Trustee all property and money held by such retiring Trustee hereunder with
respect to the Securities of that or those series to which the appointment of
such successor Trustee relates.

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

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

     SECTION 611. MERGER, CONVERSION, CONSOLIDATION OR SUCCESSION TO BUSINESS.

     Any corporation into which the Trustee may be merged or converted or with
which it may be consolidated, or any corporation resulting from any merger,
conversion or consolidation to which the Trustee shall be a party, or any
corporation succeeding to all or substantially all of the corporate trust
business of the Trustee, shall be the successor of the Trustee hereunder,
provided such corporation shall be otherwise qualified and eligible under this
Article, without the execution or filing of any paper or any further act on the
part of any of the parties hereto. As soon as practicable, the successor Trustee
shall give notice to the Company of its succession. In case any Securities shall
have been authenticated, but not delivered, by the Trustee then in office, any
successor by merger, conversion or consolidation to such authenticating Trustee
may adopt such authentication and deliver the Securities so authenticated with
the same effect as if such successor Trustee had itself authenticated such
Securities; and in case at that time any of the Securities shall not have been
authenticated, any successor 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 certificates shall have the full force which it is
anywhere in the Securities of like tenor or in this Indenture provided;
provided, however, that the right to adopt the certificate of authentication of
any predecessor Trustee or to authenticate Securities in the name of any
predecessor Trustee shall apply only to its successor or successors by merger,
conversion or consolidation.

     SECTION 612. PREFERENTIAL COLLECTION OF CLAIMS AGAINST COMPANY.

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

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<PAGE>   55

     SECTION 613. NOTICE OF DEFAULTS.

     Within 90 days after the occurrence of any Default with respect to any
series of Securities issued hereunder, the Trustee shall transmit in the manner
and to the extent provided in TIA Section 313(c), notice of such Default
hereunder known to the Trustee, unless such Default shall have been cured or
waived; provided, however, that, except in the case of a Default in the payment
of the principal of (or premium, if any, on) or interest on any series of
Securities, 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 and/or Responsible Officers of the Trustee in good faith determines
that the withholding of such notice is in the interest of the Holders of such
series.

     SECTION 614. APPOINTMENT OF AUTHENTICATING AGENT.

     The Trustee, with the prior written consent of the Company and after giving
notice of the appointment described in this Section 614 in the manner provided
in Section 1705 to all Holders or Registered Securities, if any, affected by
such appointment, may appoint an Authenticating Agent or Agents with respect to
one or more series of Securities which shall be authorized to act on behalf of
the Trustee to authenticate Securities of such series issued upon original issue
and upon exchange, registration of transfer or partial redemption thereof or
pursuant to Section 306, and Securities so authenticated shall be entitled to
the benefits of this Indenture and shall be valid and obligatory for all
purposes as if authenticated by the Trustee hereunder. Wherever reference is
made in this Indenture to the authentication and delivery of Securities by the
Trustee or the Trustee's certificate of authentication, such reference shall be
deemed to include authentication and delivery on behalf of the Trustee by an
Authenticating Agent and a certificate of authentication executed on behalf of
the Trustee by an Authenticating Agent. Each Authenticating Agent shall be
acceptable to the Company and shall at all times be a corporation organized and
doing business under the laws of the United States of America, any State thereof
or the District of Columbia (or, if Bearer Securities, organized and doing
business under the laws of the country in which the Bearer Securities are
eligible), authorized under such laws and its charter to act as Authenticating
Agent, having a combined capital and surplus of not less than $10,000,000. If at
any time an Authenticating Agent shall cease to be eligible in accordance with
the provisions of this Section, such Authenticating Agent shall resign
immediately in the manner and with the effect specified in this Section.

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

     An Authenticating Agent may, and if it shall cease to be eligible shall,
resign at any time by giving written notice thereof to the Trustee and to the
Company. The Trustee may at any time

                                       49

<PAGE>   56

terminate the agency of an Authenticating Agent by giving written notice thereof
to such Authenticating Agent and to the Company. Upon receiving such a notice of
resignation or upon such a termination, or in case at any time such
Authenticating Agent shall cease to be eligible in accordance with the
provisions of this Section, the Trustee may appoint a successor Authenticating
Agent which shall be acceptable to the Company and shall give notice of such
appointment in the manner provided in Section 1505 to all Holders of Registered
Securities, if any, of the series with respect to which such Authenticating
Agent will serve. Any successor Authenticating Agent upon acceptance of its
appointment hereunder shall become vested with all the rights, powers and duties
of its predecessor hereunder, with like effect as if originally named as an
Authenticating Agent. No successor Authenticating Agent shall be appointed
unless eligible under the provisions of this Section.

     The Company agrees to pay to each Authenticating Agent from time to time
reasonable compensation for its services under this Section. If the Trustee
makes such payments, it shall be entitled to be reimbursed for such payments,
subject to the provisions of Section 606.

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

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

                                       ---------------------------
                                       As Trustee

                                       By:
                                           -----------------------
                                           As Authenticating Agent

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

If all the Securities of a series may not be originally issued at one time, and
if the Company has an Affiliate eligible to be appointed as an Authenticating
Agent hereunder or the Trustee does not have an office capable of authenticating
Securities upon original issuance located in a Place of Payment where the
Company wishes to have Securities of such series authenticated upon original
issuance, the Trustee, if so requested by the Company in writing (which writing
need not comply with Section 1701 and need not be accompanied by an Opinion of
Counsel) shall appoint in accordance with this Section an Authenticating Agent
(which, if so requested by the Company, shall be such Affiliate of the Company)
having an office in a Place of Payment designated by the Company with respect to
such series of Securities.

                                       50

<PAGE>   57

         ARTICLE SEVEN HOLDERS' LISTS AND REPORTS BY TRUSTEE AND COMPANY

     SECTION 701 HOLDERS' LISTS; HOLDER COMMUNICATIONS; DISCLOSURES RESPECTING
HOLDERS.

     The Trustee shall preserve in as current a form as is reasonably
practicable the most recent list available to it of the names and addresses of
the Holders of each series of the Securities. Neither the Company nor the
Trustee shall be under any responsibility with regard to the accuracy of such
lists. If the Trustee is not the Security Registrar, the Company shall furnish
to the Trustee semi-annually before each Regular Record Date, and at such other
times as the Trustee may reasonably request in writing, a list, in such form as
the Trustee may reasonably request, as of such date of the names and addresses
of the Holders of each series of the Securities then known to the Company. The
Company and the Trustee shall also satisfy any other requirements imposed upon
each of them by TIA Section 312(a).

     Holders may communicate pursuant to Section 312(b) of the TIA with other
Holders with respect to their rights under this Indenture or the Securities.

     Every Holder of Securities or coupons, by receiving and holding the same,
agrees with the Company, the Security Registrar and the Trustee that none of the
Company, the Security Registrar or the Trustee, or any agent of any of them,
shall be held accountable by reason of the disclosure of any information as to
the names and addresses of the Holders in accordance with TIA Section 312,
regardless of the source from which such information was derived, that each of
such Persons shall have the protection of TIA Section 312(c) and that the
Trustee shall not be held accountable by reason of mailing any material pursuant
to a request made under TIA Section 312(b).

     SECTION 702 REPORTS BY TRUSTEE.

     Within 60 days after May 15 of each year commencing with May 15, 2001, the
Trustee shall transmit by mail to the Holders, as their names and addresses
appear in the Security Register, a brief report dated as of such May 15 in
accordance with and to the extent required under TIA Section 313(a). The Trustee
shall also comply with TIA Sections 313(b) and 313(c).

     The Company shall promptly notify the Trustee in writing if the Securities
become listed on any stock exchange or automatic quotation system.

     Commencing at the time this Indenture is qualified under the Trust
Indenture Act, a copy of each Trustee's report, at the time of its mailing to
Holders of Securities, shall be mailed to the Company and filed with the
Commission and each stock exchange, if any, on which the Securities are listed.

                                       51

<PAGE>   58

     SECTION 703 REPORTS BY COMPANY.

     The Company shall:

     (a) file with the Trustee, within 30 days after the Company is required to
file the same with the Commission, copies of the annual reports and of the
information, documents and other reports (or copies of such portions of any of
the foregoing as the Commission may from time to time by rules and regulations
prescribe) which the Company may be required to file with the Commission
pursuant to Section 13 or Section 15(d) of the Exchange Act;

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

     (c) transmit by mail to all Holders within 30 days after the filing thereof
with the Trustee, in the manner and to the extent provided in TIA Section
313(c), such summaries of any information, documents and reports (without
exhibits except to the extent required by TIA Section 313(c)) required to be
filed by the Company pursuant to paragraph (a) or (b) of this Section as may be
required by rules and regulations prescribed from time to time by the
Commission; provided that notwithstanding the requirements of such rules and
regulations, so long as any Security is Outstanding the Company shall transmit
to the Holders, within 30 days after the filing thereof with the Trustee, in the
manner and to the extent provided in Section 313(c) of the Trust Indenture Act,
the information, documents and other reports required to be filed by the Company
pursuant to paragraph (a) of this Section; provided further that in lieu of any
Annual Report on Form 10-K or Quarterly Report on Form 10-Q, the Company may
transmit an annual or quarterly report, respectively, containing financial
statements and an undertaking to transmit such Form 10-K or Form 10-Q, as the
case may be, to any Holder upon request.

       ARTICLE EIGHT CONSOLIDATION, MERGER, CONVEYANCE, TRANSFER OR LEASE

     SECTION 801. COMPANY MAY CONSOLIDATE, ETC., ONLY ON CERTAIN TERMS.

     The Company shall not, in any single transaction or a series of related
transactions, merge or consolidate with or into any other Person (other than a
merger of a Subsidiary into the Company), or sell, assign, convey, transfer,
lease or otherwise dispose of all or substantially all the Properties of the
Company to any Person or group of Affiliated Persons, unless at the time and
after giving affect thereto:

     (a) either (i) if the transaction is a merger or consolidation, the Company
shall be the surviving Person of such merger or consolidation, or (ii) the
Person (if other than the Company) formed by such consolidation or into which
the Company is merged or to which the Properties of the Company are sold,
assigned, conveyed, transferred, leased or otherwise disposed of (any such
surviving Person or transferee Person being called the "Surviving Entity") shall
be a Person organized and existing under the laws of the United States of
America, any state thereof or the District of Columbia and shall, in either
case, expressly assume by a supplemental indenture to

                                       52

<PAGE>   59

this Indenture executed and delivered to the Trustee, in form satisfactory to
the Trustee, all the obligations of the Company under the Securities and this
Indenture, and, in each case, this Indenture shall remain in full force and
effect;

     (b) immediately after giving effect to such transaction or series of
transactions on a pro forma basis (and treating any Indebtedness not previously
an obligation of the Company which becomes the obligation of the Company in
connection with or as a result of such transaction or transactions as having
been incurred at the time of such transaction or transactions), no Default or
Event of Default shall have occurred and be continuing; and

     (c) immediately after giving effect to such transaction, no event which,
after notice or lapse of time, or both, would become an Event of Default shall
have occurred and be continuing; and

     (d) the Company (or the Surviving Entity if the Company is not the
continuing obligor under this Indenture) shall have delivered to the Trustee, in
form and substance reasonably satisfactory to the Trustee, (i) an Officers'
Certificate stating that such consolidation, merger, conveyance, transfer, lease
or other disposition and, if a supplemental indenture is required in connection
with such transaction, such supplemental indenture, comply with this Indenture
and (ii) an Opinion of Counsel stating that the requirements of Section 801(a)
have been satisfied.

     SECTION 802. SUCCESSOR SUBSTITUTED.

     Upon any consolidation of the Company with or merger of the Company into
any other Person or any sale, assignment, lease, conveyance, transfer or other
disposition of all or substantially all of the Properties of the Company in
accordance with Section 801 hereof, the Surviving Entity shall succeed to, and
be substituted for, and may exercise every right and power of, the Company under
this Indenture with the same effect as if such Surviving Entity had been named
as the Company herein, and in the event of any such sale, assignment, lease,
conveyance, transfer or other disposition, the Company (which term shall for
this purpose mean the Person named as the "Company" in the first paragraph of
this Indenture or any successor Person which shall theretofore become such in
the manner described in Section 801 hereof), except in the case of a lease,
shall be discharged from all obligations and covenants under this Indenture and
the Securities and coupons, and the Company may be dissolved and liquidated.

                      ARTICLE NINE SUPPLEMENTAL INDENTURES

     SECTION 901. SUPPLEMENTAL INDENTURES WITHOUT CONSENT OF HOLDERS.

     Without the consent of any Holders of Securities or coupons, the Company,
when authorized by a Board Resolution, and the Trustee upon Company Request, at
any time and from time to time, may enter into one or more indentures
supplemental hereto (which shall conform with the requirements of the TIA) or
otherwise amend this Indenture, in form satisfactory to the Trustee, for any of
the following purposes:

                                       53

<PAGE>   60

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

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

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

          (4) to 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 610; or

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

          (6) to secure the Securities pursuant to the requirements of this
     Indenture or otherwise; or

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

          (8) to add to, change or eliminate any of the provisions of this
     Indenture in respect of one or more series of Securities, provided that any
     such addition, change or elimination (A) shall neither (i) apply to any
     Security of any series created prior to the

                                       54

<PAGE>   61

     execution of such supplemental indenture and entitled to the benefit of
     such provision nor (ii) modify the rights of the Holder of any such
     Security with respect to such provision or (B) shall become effective only
     when there is no such Security Outstanding; or

          (9) to provide for uncertificated Securities of any series in addition
     to or in place of certificated Securities of such series; or

          (10) to comply with the requirements of the Commission in order to
     affect or maintain the qualification of this Indenture under the Trust
     Indenture Act; or

          (11) to establish the form or terms of Securities of any series and
     any related coupons as permitted by Sections 201 and 301; or

          (12) to provide for adjustment of conversion rights pursuant to
     Section 1505 hereof; or

          (13) to make any change that does not adversely affect the interests
     of any Holder; or

          (14) to supplement any of the provisions of this Indenture to such
     extent as shall be necessary to permit or facilitate the discharge or
     defeasance of any Securities pursuant to Article Four or Twelve; provided
     that any such action shall not adversely affect the interests of any Holder
     of Securities in any material respect.

     Upon Company Request, accompanied by a Board Resolution authorizing the
execution of any such supplemental indenture, and subject to and upon receipt by
the Trustee of the documents described in Section 903 hereof, the Trustee shall
join with the Company in the execution of any supplemental indenture authorized
or permitted by the terms of this Indenture and to make any further appropriate
agreements and stipulations which may be therein contained.

     SECTION 902. SUPPLEMENTAL INDENTURES WITH CONSENT OF HOLDERS.

     With the consent of the Holders of not less than a majority in aggregate
principal amount of the Outstanding Securities of each series affected by such
supplemental indenture (which consent may, but need not, be given in connection
with any tender offer or exchange offer for the Securities of each series
affected), by Act of said Holders delivered to the Company and the Trustee, the
Company, when authorized by a Board Resolution, and the Trustee upon Company
request may enter into an indenture or indentures supplemental hereto,
amendments to this Indenture or waivers for the purpose of adding any provisions
to or changing in any manner or eliminating any of the provisions of this
Indenture or of modifying in any manner the rights of the Holders of Securities
of such series and any related coupons under this Indenture; provided, however,
that no such supplemental indenture, amendment or waiver shall, without the
consent of the Holder of each Outstanding Security affected thereby:

                                       55

<PAGE>   62

          (1) change the Stated Maturity of the principal of, or any installment
     of principal of or interest on, any Security, or reduce the principal
     amount thereof or the rate of interest thereon or any premium payable upon
     the redemption thereof, or reduce the amount of the principal of an
     Original Issue Discount Security or any other Security which would be due
     and payable upon a declaration of acceleration of the Maturity thereof
     pursuant to Section 502, or adversely affect any right of repayment at the
     option of a Holder of any Security, or reduce the amount of, or postpone
     the date fixed for, the payment of any sinking fund or analogous
     obligation, or change any Place of Payment where, or the coin or currency
     in which, any Security or any premium or interest thereon is payable, or
     adversely affect the right to convert Securities, if applicable, or impair
     the right to institute suit for the enforcement of (x) any such payment on
     or after the Stated Maturity thereof (or, in the case of redemption, on or
     after the Redemption Date) or (y) any conversion right with respect to any
     Security, or

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

          (3) change any obligation of the Company to maintain an office or
     agency in the places and for the purposes specified in Section 1002, or

          (4) modify any of the provisions of this Section, Section 513 or
     Section 1007 except to increase any such percentage or to provide that
     certain other provisions of this Indenture cannot be modified or waived
     without the consent of the Holder of each Outstanding Security affected
     thereby; provided, however, that this clause shall not be deemed to require
     the consent of any Holder of a Security or coupon with respect to changes
     in the references to "the Trustee" and concomitant changes in this Section
     and Section 1007 or the deletion of this proviso, in accordance with the
     requirements of Sections 610 and 901(4); or

          (5) modify any provisions of this Indenture relating to the relative
     ranking of the Securities in a manner adverse to the Holders thereof.

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

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

                                       56

<PAGE>   63

     SECTION 903. EXECUTION OF SUPPLEMENTAL INDENTURES.

     In executing, or accepting the additional trusts created by, any
supplemental indenture permitted by this Article or the modifications thereby of
the trusts created by this Indenture, the Trustee shall be entitled to receive
and (subject to Section 601) shall be fully protected in relying upon an Opinion
of Counsel stating that the execution of such supplemental indenture is
authorized or permitted by this Indenture. The Trustee may, but shall not be
obligated to, enter into any such supplemental indenture which affects the
Trustee's own rights, duties or immunities under this Indenture or otherwise.

     SECTION 904. EFFECT OF SUPPLEMENTAL INDENTURES.

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

     SECTION 905. CONFORMITY WITH TRUST INDENTURE ACT.

     Every supplemental indenture or amendment executed pursuant to this Article
shall conform to the requirements of the Trust Indenture Act as then in effect.

     SECTION 906. REFERENCE IN SECURITIES TO SUPPLEMENTAL INDENTURES.

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

     SECTION 907. SUBORDINATION UNIMPAIRED.

     This Indenture may not be amended to alter the subordination of any
Outstanding Securities without the written consent of each holder of Senior
Indebtedness then outstanding that would be adversely affected thereby.

     SECTION 908. EFFECT ON SENIOR INDEBTEDNESS.

     No supplemental indenture shall adversely affect the rights of the holders
of Senior Indebtedness under Article Sixteen unless expressly consented to in
writing by or on behalf of such holders or by any specified percentage of
holders of a class of Senior Indebtedness required to consent thereto pursuant
to the terms of the agreement or instrument creating, evidencing or governing
such Senior Indebtedness, in which event such supplemental indenture shall be

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binding on all successors and assigns of such holders and on all persons who
become holders of such Senior Indebtedness issued after the date of such
amendment or modification.

     SECTION 909. RECORD DATE.

     If the Company shall solicit from the Holders any request, demand,
authorization, direction, notice, consent, waiver or other action, the Company
may, but shall not be obligated to, fix a record date for the purpose of
determining the Holders entitled to consent to any supplemental indenture,
agreement or instrument or any waiver, and shall promptly notify the Trustee of
any such record date. If a record date is fixed those Persons who were Holders
at such record date (or their duly designated proxies), and only those Persons,
shall be entitled to consent to such supplemental indenture, agreement or
instrument or waiver or to revoke any consent previously given, whether or not
such Persons continue to be Holders after such record date. The record date
shall be a date no more than 30 days prior to the first solicitation of Holders
generally in connection therewith and no later than the date such solicitation
is completed. No such consent shall be valid or effective for more than six
months after such record date. Subject to applicable law, until any supplemental
indenture, agreement, instrument or waiver becomes effective, or a consent to it
by a Holder of a Security shall cease to be valid and effective as set forth in
the preceding sentence, such consent is a continuing consent by the Holder and
every subsequent Holder of a Security or portion of a Security that evidences
the same debt as the consenting Holder's Security.

                              ARTICLE TEN COVENANTS

     SECTION 1001. PAYMENT OF PRINCIPAL, PREMIUM AND INTEREST.

     The Company covenants and agrees for the benefit of each series of
Securities that it will duly and punctually pay the principal of and any premium
and interest on the Securities of that series in accordance with the terms of
the Securities, any coupons appertaining thereto and this Indenture. Unless
otherwise specified as contemplated by Section 301 with respect to any series of
Securities, any interest due on Bearer Securities on or before Maturity shall be
payable only upon presentation and surrender of the several coupons for such
interest installments as are evidenced thereby as they severally mature.

     SECTION 1002. MAINTENANCE OF OFFICE OR AGENCY.

     If Securities of a series are issuable only as Registered Securities, the
Company will maintain in each Place of Payment for such series an office or
agency where Securities of that series may be presented or surrendered for
payment or, if applicable, for conversion, where Securities of that series may
be surrendered for registration of transfer or exchange and where notices and
demands to or upon the Company in respect of the Securities of that series and
this Indenture may be served. If Securities of a series are issuable as Bearer
Securities, the Company will maintain (A) in The City of New York, an office or
agency where any Registered Securities of that series may be presented or
surrendered for payment or, if applicable, for conversion, where any Registered
Securities of that series may be surrendered for registration of transfer,

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<PAGE>   65

where Securities of that series may be surrendered for exchange, where notices
and demands to or upon the Company in respect of the Securities of that series
and this Indenture may be served and where Bearer Securities of that series and
related coupons may be presented or surrendered for payment in the circumstances
described in the following paragraph (and not otherwise), (B) subject to any
laws or regulations applicable thereto, in a Place of Payment for that series
which is located outside the United States, an office or agency where Securities
of that series and related coupons may be presented and surrendered for payment
(including payment of any additional amounts payable on Securities of that
series pursuant to Section 1004) or, if applicable, for conversion; provided,
however, that if the Securities of that series are listed on The International
Stock Exchange of the United Kingdom and the Republic of Ireland Limited, the
Luxembourg Stock Exchange or any other stock exchange located outside the United
States and such stock exchange shall so require, the Company will maintain a
Paying Agent for the Securities of that series in London, Luxembourg or any
other required city located outside the United States, as the case may be, so
long as the Securities of that series are listed on such exchange, and (C)
subject to any laws or regulations applicable thereto, in a Place of Payment for
that series located outside the United States an office or agency where any
Registered Securities of that series may be surrendered for registration of
transfer, where Securities of that series may be surrendered for exchange and
where notices and demands to or upon the Company in respect of the Securities of
that series and this Indenture may be served. The Company will give prompt
written notice to the Trustee and prompt notices to the Holders as provided in
Section 1705 of the location, and any change in the location, of any such office
or agency. If at any time the Company shall fail to maintain any such required
office or agency in respect of any series of Securities or shall fail to furnish
the Trustee with the address thereof, such presentations and surrenders of
Securities of that series may be made and notices and demands may be made or
served at the Corporate Trust Office of the Trustee, except that Bearer
Securities of that series and the related coupons may be presented and
surrendered for payment (including payment of any additional amounts payable on
Bearer Securities of that series pursuant to Section 1004) or, if applicable,
for conversion, at any Paying Agent for such series located outside the United
States, and the Company hereby appoints the same as its agents to receive such
respective presentations, surrenders, notices and demands.

     No payment of principal, premium or interest on Bearer Securities shall be
made at any office or agency of the Company in the United States or by check
mailed to any address in the United States or by transfer to an account
maintained with a bank located in the United States; provided, however, that, if
the Securities of a series are denominated and payable in Dollars payment of
principal of and any premium and interest on any Bearer Security (including any
additional amounts payable on Securities of such series pursuant to Section
1004) shall be made at the office of the Company's Paying Agent in The City of
New York, if (but only if) payment in Dollars of the full amount of such
principal, premium, interest or additional amounts, as the case may be, at all
offices or agencies outside the United States maintained for the purpose by the
Company in accordance with this Indenture is illegal or effectively precluded by
exchange controls or other similar restrictions.

     The Company may also from time to time designate one or more other offices
or agencies where Securities of one or more series may be presented or
surrendered for any or all such

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<PAGE>   66

purposes and may from time to time rescind such designations. The Company will
give prompt written notice to the Trustee and the Holders of any such
designation or rescission and of any other change in the location of any such
other office or agency.

     SECTION 1003. MONEY FOR SECURITIES PAYMENTS TO BE HELD IN TRUST.

     If the Company shall at any time act as its own Paying Agent with respect
to any series of Securities, it shall, on or before 11:00 a.m., Eastern time, on
each due date of the principal of (or premium, if any, on) or interest on any of
the Securities of that series, segregate and hold in trust for the benefit of
the Persons entitled thereto a sum sufficient to pay the principal (and premium,
if any) and interest so becoming due until such sum shall be paid to such
Persons or otherwise disposed of as herein provided and will promptly notify the
Trustee of its action or failure so to act.

     Whenever the Company shall have one or more Paying Agents for any series of
Securities, it will, on or before 11:00 a.m., Eastern time, on each due date of
the principal of (or premium, if any, on) or interest on any Securities of that
series, deposit with a Paying Agent immediately available funds in a sum
sufficient to pay such amount, such sum to be held in trust for the benefit of
the Persons entitled thereto, and (unless such Paying Agent is the Trustee) the
Company will promptly notify the Trustee of its action or failure so to act.

     The Company shall cause each Paying Agent for any series of Securities
(other than the Trustee or itself) to execute and deliver to the Trustee an
instrument in which such Paying Agent shall agree with the Trustee, subject to
the provisions of this Section, that such Paying Agent will: (1) hold all sums
held by it for the payment of the principal of (and premium, if any, on) or
interest on Securities of that series in trust for the benefit of the Persons
entitled thereto until such sums shall be paid to such Persons or otherwise
disposed of as herein provided; (2) give the Trustee notice of any Event of
Default by the Company (or any other obligor upon the Securities of that series)
in the making of any payment of principal (and premium, if any) or interest; and
(3) at any time during the continuance of any such Event of Default upon the
written request of the Trustee, forthwith pay to the Trustee all sums held in
trust by such Paying Agent for payment in respect of the Securities of that
series.

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

     The Trustee and each Paying Agent shall promptly pay to the Company upon
Company Request any money held by them (other than pursuant to Article Twelve)
at any time in excess of amounts required to pay principal of, premium, if any,
or interest on the Securities of any series.

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<PAGE>   67

     Any money deposited with the Trustee or any Paying Agent, or then held by
the Company, in trust for the payment of the principal of (and premium, if any,
on) or interest on any Security of any series and remaining unclaimed for one
year after such principal (and premium, if any) or interest has become due and
payable shall be paid to the Company on Company Request, or (if then held by the
Company) shall be discharged from such trust; and the Holder of such Security or
any coupon appertaining thereto shall thereafter, as an unsecured general
creditor, look only to the Company for payment thereof, and all liability of the
Trustee or such Paying Agent with respect to such trust money, and all liability
of the Company as trustee thereof, shall thereupon cease; provided, however,
that the Trustee or such Paying Agent, before being required to make any such
repayment, shall at the expense of the Company cause to be published once, in an
Authorized Newspaper in each Place of Payment, notice that such money remains
unclaimed and that, after a date specified therein, which shall not be less than
30 days from the date of such publication, any unclaimed balance of such money
then remaining will be repaid to the Company.

     SECTION 1004. ADDITIONAL AMOUNTS.

     If the Securities of a series provide for the payment of additional
amounts, the Company will pay to the Holder of any Security of such series or
any coupon appertaining thereto additional amounts as provided therein. Whenever
in this Indenture there is mentioned, in any context, the payment of the
principal of or any premium or interest on, or in respect of, any Security of
any series or payment of any related coupon or the net proceeds received on the
sale or exchange of any Security of any series, such mention shall be deemed to
include mention of the payment of additional amounts provided for in this
Section to the extent that, in such context, additional amounts are, were or
would be payable in respect thereof pursuant to the provisions of this Section
and express mention of the payment of additional amounts (if applicable) in any
provisions hereof shall not be construed as excluding additional amounts in
those provisions hereof where such express mention is not made. If the
Securities of a series provide for the payment of additional amounts, at least
10 days prior to the first Interest Payment Date with respect to that series of
Securities (or if the Securities of that series will not bear interest prior to
Maturity, the first day on which a payment of principal and any premium is
made), and at least 10 days prior to each date of payment of principal and any
premium or interest if there has been any change with respect to the matters set
forth in the below-mentioned Officers' Certificate, the Company will furnish the
Trustee and the Company's principal Paying Agent or Paying Agents, if other than
the Trustee, with an Officers' Certificate instructing the Trustee and such
Paying Agent or Paying Agents whether such payment of principal of and any
premium or interest on the Securities of that series shall be made to Holders of
Securities of that series or any related coupons who are United States Aliens
without withholding for or on account of any tax, assessment or other
governmental charge described in the Securities of that series. If any such
withholding shall be required, then such Officers' Certificate shall specify by
country the amount, if any, required to be withheld on such payments to such
Holders of Securities or coupons and the Company will pay to the Trustee or such
Paying Agent the additional amounts required by this Section. The Company
covenants to indemnify the Trustee and any Paying Agent for, and to hold them
harmless against, any loss, liability or expense reasonably incurred

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<PAGE>   68

without negligence or bad faith on their part arising out of or in connection
with actions taken or omitted by any of them in reliance on any Officers'
Certificate furnished pursuant to this Section.

     SECTION 1005. PURCHASE OF SECURITIES BY COMPANY OR SUBSIDIARY.

     If and so long as the Securities of a series are listed on The
International Stock Exchange of the United Kingdom and the Republic of Ireland
Limited and such stock exchange shall so require, the Company will not, and will
not permit any of its Subsidiaries to, purchase any Securities of that series by
private treaty at a price (exclusive of expenses and accrued interest) which
exceeds 120% of the mean of the nominal quotations of the Securities of that
series as shown in The Stock Exchange Daily Official List for the last trading
day preceding the date of purchase.

     SECTION 1006. STATEMENT BY OFFICER AS TO DEFAULT.

     The Company shall deliver to the Trustee, within 120 days after the end of
each fiscal year of the Company ending after the date hereof and within 45 days
after the end of each of the first, second, and third quarters, an Officers'
Certificate, stating whether or not to the best knowledge of the signers thereof
(one of whom shall be the principal accounting officer of the Company) the
Company is in default in the performance and observance of any of the terms,
provisions and conditions of this Indenture (without regard to any period of
grace or requirement of notice provided hereunder) and, if the Company shall be
in default, specifying all such defaults and the nature and status thereof of
which they may have knowledge. In addition, the Company shall deliver to the
Trustee, forthwith upon any of its officers becoming aware of any default, an
Officers' Certificate specifying such default and what action the Company is
taking or proposes to take with respect thereto.

     SECTION 1007. WAIVER OF CERTAIN COVENANTS.

     The Company may, with respect to the Securities of any series, omit in any
particular instance to comply with any term, provision or condition set forth in
any covenant provided pursuant to Section 301(19), 901(2) or 901(11) for the
benefit of the Holders of such series, if before the time for such compliance
the Holders of at least a majority in aggregate principal amount of the
Outstanding Securities of such series shall, by Act of such Holders and on
behalf of the Holders of all Securities of such series, either waive such
compliance in such instance or generally waive compliance with such term,
provision or condition, but no such waiver shall extend to or affect such term,
provision or condition except to the extent so expressly waived, and, until such
waiver shall become effective, the obligations of the Company and the duties of
the Trustee in respect of any such term, provision or condition shall remain in
full force and effect.

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                     ARTICLE ELEVEN REDEMPTION OF SECURITIES

     SECTION 1101. APPLICABILITY OF ARTICLE.

     Securities of any series which are redeemable before their Stated Maturity
shall be redeemable in accordance with their terms and (except as otherwise
specified as contemplated by Section 301 for such Securities) in accordance with
this Article.

     SECTION 1102. ELECTION TO REDEEM; NOTICE TO TRUSTEE.

     The election of the Company to redeem any Securities shall be evidenced by
a Board Resolution, Officers' Certificate or in another manner specified as
contemplated by Section 301 for such Securities. In the case of any redemption
at the election of the Company of less than all the Securities of any series
(including any such redemption affecting only a single Security), the Company
shall, at least 45 days prior to the Redemption Date fixed by the Company
(unless a shorter notice shall be satisfactory to the Trustee), notify the
Trustee of such Redemption Date, of the principal amount of Securities of such
series to be redeemed and, if applicable, of the tenor of the Securities of such
series to be redeemed. Any election to redeem shall be revocable until the
Company gives notice pursuant to Section 1104 to the Note Holders.

     SECTION 1103. SELECTION OF SECURITIES TO BE REDEEMED.

     If less than all the Securities of any series are to be redeemed (unless
all the Securities of such series and of a specified tenor are to be redeemed or
unless such redemption affects only a single Security) the particular Securities
to be redeemed shall be selected not less than 30 days prior to the Redemption
Date by the Trustee, from the Outstanding Securities of such series not
previously called for redemption, by such method as the Trustee shall deem fair
and appropriate and which may provide for the selection for redemption of
portions of the principal amount of Registered Securities of such series of a
denomination larger than the minimum authorized denomination for Securities of
that series or of the principal amount of global Securities of such series.

     The Trustee shall promptly notify the Company in writing of the Securities
selected for redemption as aforesaid and, in the case of any Securities selected
for partial redemption as aforesaid, the principal amount thereof to be
redeemed. For all purposes of this Indenture, unless the context otherwise
requires, all provisions relating to the redemption of Securities shall relate,
in the case of any Securities redeemed or to be redeemed only in part, to the
portion of the principal amount of such Securities which has been or is to be
redeemed.

     SECTION 1104. NOTICE OF REDEMPTION.

     Notice of redemption shall be given in the manner provided in Section 1705
to the Holders of Securities to be redeemed not less than 30 nor more than 60
days prior to the Redemption Date.

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<PAGE>   70

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

     All notices of redemption shall state:

          (1) the Redemption Date,

          (2) the Redemption Price,

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

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

          (5) the place or places where such Securities, together in the case of
     Bearer Securities with all coupons appertaining thereto, if any, maturing
     after the Redemption Date, are to be surrendered for payment of the
     Redemption Price,

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

          (7) if applicable, the Conversion Price then in effect and the date on
     which the right to convert the Securities or portions thereof to be
     redeemed will expire, and

          (8) the CUSIP number of such Securities, if any (or any other numbers
     used by a Depositary to identify such Securities).

     A notice of redemption published as contemplated by Section 1705 need not
identify particular Registered Securities to be redeemed.

     If any of the Securities to be redeemed is in the form of a Book-Entry
Security, then the Company shall modify the notice of redemption to the extent
necessary to accord with the procedures of the Depositary applicable to
redemptions.

     Notice of redemption of Securities to be redeemed at the election of the
Company shall be given by the Company or, at the Company's request, by the
Trustee in the name and at the expense of the Company. Failure to give such
notice by mailing to any Holder of Securities or any defect therein shall not
affect the validity of any proceedings for the redemption of other Securities.

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<PAGE>   71

     SECTION 1105. DEPOSIT OF REDEMPTION PRICE.

     On or before 11:00 a.m., Eastern time, on any Redemption Date, the Company
shall deposit with the Trustee or with a Paying Agent (or, if the Company is
acting as its own Paying Agent, segregate and hold in trust as provided in
Section 1003) immediately available funds in an amount sufficient to pay the
Redemption Price of, and (except if the Redemption Date shall be an Interest
Payment Date) accrued interest on, all the Securities which are to be redeemed
on that date. Upon Company Order, the Paying Agent shall promptly return to the
Company any money so deposited which is not required for such purpose.

     SECTION 1106. SECURITIES PAYABLE ON REDEMPTION DATE.

     Notice of redemption having been given as aforesaid, the Securities so to
be redeemed shall, on the Redemption Date, become due and payable at the
Redemption Price therein specified, and from and after such date (unless the
Company shall default in the payment of the Redemption Price and accrued
interest) such Securities shall cease to bear interest and the coupons for such
interest appertaining to any Bearer Securities so to be redeemed, except to the
extent provided below, shall be void. Upon surrender of any such Security for
redemption in accordance with said notice, together with all coupons, if any,
appertaining thereto maturing after the Redemption Date, such Security shall be
paid by the Company at the Redemption Price, together with accrued interest to
the Redemption Date; provided, however, that installments of interest on Bearer
Securities whose Stated Maturity is on or prior to the Redemption Date shall be
payable only at an office or agency located outside the United States (except as
otherwise provided in Section 1002) and, unless otherwise specified as
contemplated by Section 301, only upon presentation and surrender of coupons for
such interest, and provided, further, that, unless otherwise specified as
contemplated by Section 301, installments of interest on Registered Securities
whose Stated Maturity is on or prior to the Redemption Date shall be payable to
the Holders of such Securities, or one or more Predecessor Securities,
registered as such at the close of business on the relevant Record Dates
according to their terms and the provisions of Section 307.

     If any Bearer Security surrendered for redemption shall not be accompanied
by all appurtenant coupons maturing after the Redemption Date, such Security may
be paid after deducting from the Redemption Price an amount equal to the face
amount of all such missing coupons, or the surrender of such missing coupon or
coupons may be waived by the Company and the Trustee if there be furnished to
them such security or indemnity as they may require to save each of them and any
Paying Agent harmless. If thereafter the Holder of such Security shall surrender
to the Trustee or any Paying Agent any such missing coupon in respect of which a
deduction shall have been made from the Redemption Price, such Holder shall be
entitled to receive the amount so deducted; provided, however, that interest
represented by coupons shall be payable only at an office or agency located
outside the United States (except as otherwise provided in Section 1002) and,
unless otherwise specified as contemplated by Section 301, only upon
presentation and surrender of those coupons.

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

     SECTION 1107. SECURITIES REDEEMED IN PART.

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

     SECTION 1108. PURCHASE OF SECURITIES.

     The Company shall have the right at any time and from time to time to
purchase securities in the open market or otherwise at any price.

                          ARTICLE TWELVE SINKING FUNDS

     SECTION 1201. APPLICABILITY OF ARTICLE.

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

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

     SECTION 1202. SATISFACTION OF SINKING FUND PAYMENTS WITH SECURITIES.

     The Company (1) may deliver Outstanding Securities of a series (other than
any previously called for redemption), together in the case of any Bearer
Securities of such series with all unmatured coupons appertaining thereto, and
(2) may apply as a credit Securities of a series which have been (x) converted
into Common Stock or (y) redeemed either at the election of the Company pursuant
to the terms of such Securities or through the application of permitted optional
sinking fund payments pursuant to the terms of such Securities, in each case in

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satisfaction of all or any part of any sinking fund payment with respect to any
Securities of such series required to be made pursuant to the terms of such
Securities as and to the extent provided for by the terms of such Securities,
provided that the Securities to be so credited have not been previously so
credited. The Securities to be so credited shall be received and credited for
such purpose by the Trustee at the Redemption Price, as specified in the
Securities so to be redeemed, for redemption through operation of the sinking
fund and the amount of such sinking fund payment shall be reduced accordingly.

     SECTION 1203. REDEMPTION OF SECURITIES FOR SINKING FUND.

     Not less than 45 days prior to each sinking fund payment date for any
series of Securities, the Company will deliver to the Trustee a Company Order
specifying the amount of the next ensuing sinking fund payment for that series
pursuant to the terms of that series, the portion thereof, if any, which is to
be satisfied by payment of cash and the portion thereof, if any, which is to be
satisfied by delivering and crediting Securities of that series pursuant to
Section 1202 and will also deliver to the Trustee any Securities to be so
credited. Not less than 30 days before each such sinking fund payment date the
Company or the Trustee shall select the Securities to be redeemed upon such
sinking fund payment date in the manner specified in Section 1103 and cause
notice of the redemption thereof to be given in the name of and at the expense
of the Company in the manner provided in Section 1104. Such notice having been
duly given, the redemption of such Securities shall be made upon the terms and
in the manner stated in Sections 1106 and 1107.

               ARTICLE THIRTEEN DEFEASANCE AND COVENANT DEFEASANCE

     SECTION 1301. COMPANY'S OPTION TO EFFECT DEFEASANCE OR COVENANT DEFEASANCE.

     The Company may at its option by Board Resolution, at any time, elect to
have either Section 1302 or Section 1303 applied to the Outstanding Securities
of any series upon compliance with the conditions set forth below in this
Article Thirteen.

     SECTION 1302. DEFEASANCE AND DISCHARGE.

     Upon the Company's exercise of the option provided in Section 1301
applicable to this Section, the Company shall be deemed to have been discharged
from its obligations with respect to the Outstanding Securities (other than any
convertible Securities) of any series on the date the conditions set forth in
Section 1304 are satisfied (hereinafter, "legal defeasance"). For this purpose,
such legal defeasance means that the Company shall be deemed to have paid and
discharged the entire indebtedness represented by the Outstanding Securities of
such series; provided, however, that the Securities shall continue to be deemed
to be Outstanding for purposes of Section 1305 and to have satisfied all its
other obligations under the Securities of such series and this Indenture insofar
as the Securities of such series are concerned (and the Trustee, at the expense
and direction of the Company, shall execute proper instruments acknowledging the
same), except for the following which shall survive until otherwise terminated
or discharged hereunder: (A) the rights of Holders of the Outstanding Securities
of

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such series to receive, solely from the trust fund described in Section 1304 and
as more fully set forth in such Section, payments in respect of the principal of
(and premium, if any, on and interest on the Securities of such series when such
payments are due, (B) the Company's obligations with respect to such Securities
under Sections 304, 305, 306, 1002, 1003 and 1004, (C) the rights, powers,
trusts, duties and immunities of the Trustee hereunder and (D) this Article
Thirteen. Subject to compliance with this Article Thirteen, the Company may
exercise its option under this Section 1302 notwithstanding the prior exercise
of its option under Section 1303.

     SECTION 1303. COVENANT DEFEASANCE.

     Upon the Company's exercise of the option provided in Section 1301
applicable to this Section, (i) the Company shall be released from its
obligations with respect to the Securities of such series under Sections 801 and
1005 and any covenant added to this Indenture pursuant to Sections 301(19),
901(2) and 901(11), and (ii) the occurrence of any event specified in Section
501(4) (with respect to Sections 801 and 1005 and any such covenants added to
this Indenture pursuant to Sections 301 (19), 901(2) and 901 (11)) and 501(7)
shall be deemed to not be or result in an Event of Default, in each case with
respect to such Securities as provided in this Section on and after the date the
conditions set forth in Section 1304 are satisfied (hereinafter, "covenant
defeasance") or 501(9), and the Securities shall thereafter be deemed not to be
Outstanding for the purposes of any direction, waiver, consent, declaration or
other action of any Holders (and the consequences of any thereof) in connection
with such covenants, but shall continue to be deemed Outstanding for all other
purposes hereunder. For this purpose, such covenant defeasance means that the
Company may omit to comply with and shall have no liability in respect of any
term, condition or limitation set forth in any such Article or Section (to the
extent so specified in the case of Section 501(4)), whether directly or
indirectly, by reason of any reference elsewhere herein to any such Article or
Section or by reason of any reference in any such Article or Section to any
other provision herein or in any other document, but, except as specified above,
the remainder of this Indenture and such Securities shall be unaffected thereby.

     SECTION 1304. CONDITIONS TO DEFEASANCE OR COVENANT DEFEASANCE.

     The following shall be the conditions to application of either Section 1302
or Section 1303 to the then Outstanding Securities of any series:

          (1) The Company shall irrevocably have deposited or caused to be
     deposited with the Trustee (or another trustee satisfying the requirements
     of Section 608 who shall agree to comply with the provisions of this
     Article Thirteen applicable to it) as trust funds in trust for the purpose
     of making the following payments specifically pledged as security for, and
     dedicated solely to, the benefit of the Holders of the Securities of such
     series, (A) cash in U.S. dollars in an amount, or (B) U.S. Government
     Obligations which through the scheduled payment of principal and interest
     in respect thereof in accordance with their terms will provide, not later
     than one day before the due date of any payment, money in an amount, or (C)
     a combination thereof, 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 and discharge, and
     which shall be applied by the

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     Trustee (or other qualifying trustee) to pay and discharge, the principal
     of (and premium, if any, on) and interest on the Outstanding Securities and
     any coupons pertaining thereto on the Stated Maturity thereof (or
     Redemption Date if applicable) provided that the Trustee shall have been
     irrevocably instructed in writing by the Company to apply such Money or the
     proceeds of such U.S. Government Obligations to said payments with respect
     to the Securities. Before such a deposit, the Company may give to the
     Trustee, in accordance with Section 1102, a notice of its election to
     redeem all of the Outstanding Securities at a future date in accordance
     with Article Eleven, which notice shall be irrevocable. Such irrevocable
     redemption notice, if given, shall be given effect in applying the
     foregoing. For this purpose, "U.S. Government Obligations" means securities
     that are (x) direct obligations of the United States of America for the
     timely payment of which its full faith and credit is pledged or (y)
     obligations of a Person controlled or supervised by and acting as an agency
     or instrumentality of the United States of America the timely payment of
     which is unconditionally guaranteed as a full faith and credit obligation
     by the United States of America, which, in either case, are not callable or
     redeemable at the option of the issuer thereof, and shall also include a
     depository receipt issued by a bank (as defined in Section 3(a)(2) of the
     Securities Act), as custodian with respect to any such U.S. Government
     Obligation or a specific payment of principal of or interest on any such
     U.S. Government Obligation held by such custodian for the account of the
     holder of such depository receipt, provided that (except as required by
     law) such custodian is not authorized to make any deduction from the amount
     payable to the holder of such depository receipt from any amount received
     by the custodian in respect of the U.S. Government Obligation or the
     specific payment of principal of or interest on the U.S. Government
     Obligation evidenced by such depository receipt.

          (2) No Event of Default or Event of Default with respect to the
     Securities of such series shall have occurred and be continuing on the date
     of such deposit or, insofar as subsections 501(5) and (6) are concerned, at
     any time during the period ending on the 91st day after the date of such
     deposit.

          (3) Such legal defeasance or covenant defeasance shall not cause the
     Trustee to have a conflicting interest under this Indenture and the Trust
     Indenture Act with respect to any securities of the Company.

          (4) Such legal defeasance or covenant defeasance shall not result in a
     breach or violation of, or constitute a default under, any other material
     agreement or instrument to which the Company is a party or by which it is
     bound, as evidenced to the Trustee in an Officers' Certificate delivered to
     the Trustee concurrently with such deposit.

          (5) In the case of an election under Section 1302, the Company shall
     have delivered to the Trustee an Opinion of Counsel stating that (x) the
     Company has received from, or there has been published by, the Internal
     Revenue Service a ruling, or (y) since the date of this Indenture there has
     been a change in the applicable federal income tax laws, in either case to
     the effect that, and based thereon such opinion shall confirm that,

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<PAGE>   76

     the Holders of the Outstanding Securities of such series will not recognize
     income, gain or loss for federal income tax purposes as a result of such
     legal defeasance and will be subject to federal income tax on the same
     amounts, in the same manner and at the same times as would have been the
     case if such legal defeasance had not occurred (it being understood that
     (x) such Opinion of Counsel shall also state that such ruling or applicable
     law is consistent with the conclusions reached in such Opinion of Counsel
     and (y) the Trustee shall be under no obligation to investigate the basis
     or correctness of such ruling).

          (6) In the case of an election under Section 1303, the Company shall
     have delivered to the Trustee an Opinion of Counsel to the effect that the
     Holders of the Outstanding Securities of such series will not recognize
     income, gain or loss for federal income tax purposes as a result of such
     covenant defeasance and will be subject to federal income tax on the same
     amounts, in the same manner and at the same times as would have been the
     case if such covenant defeasance had not occurred.

          (7) The Company shall have delivered to the Trustee an Officers'
     Certificate and an Opinion of Counsel, which, taken together, state that
     all conditions precedent provided for relating to either the legal
     defeasance under Section 1302 or the covenant defeasance under Section 1303
     (as the case may be) have been complied with.

          SECTION 1305. DEPOSITED MONEY AND U.S. GOVERNMENT OBLIGATIONS TO BE
HELD IN TRUST; MISCELLANEOUS PROVISIONS.

     Subject to the provisions of the last paragraph of Section 1003, all money
and U.S. Government Obligations (including the proceeds thereof) deposited with
the Trustee (or other qualifying trustee -- collectively, for purposes of this
Section 1305, the "Trustee") pursuant to Section 1304 in respect of the
Outstanding Securities of such series shall be held in trust and applied by the
Trustee, in accordance with the provisions of such Securities of such series and
this Indenture, to the payment, either directly or through any Paying Agent
(including the Company acting as its own Paying Agent) as the Trustee may
determine, to the Holders of the Securities of such series, of all sums due and
to become due thereon in respect of principal (and premium, if any) and
interest, but such money need not be segregated from other funds except to the
extent required by law.

     The Company shall pay and indemnify the Trustee against any tax, fee or
other charge imposed on or assessed against the U.S. Government Obligations
deposited pursuant to Section 1304 or the principal and interest received in
respect thereof other than any such tax, fee or other charge which by law is for
the account of the Holders of the Outstanding Securities.

     Anything in this Article Thirteen to the contrary notwithstanding, the
Trustee shall deliver or pay to the Company from time to time upon Company
Request any money or U.S. Government Obligations held by it as provided in
Section 1304 which, in the opinion of a nationally recognized firm of
independent public accountants expressed in a written certification thereof
delivered to the Trustee, are in excess of the amount thereof which would then
be

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required to be deposited to effect an equivalent legal defeasance or covenant
defeasance, as applicable, in accordance with this Article.

     SECTION 1306. REINSTATEMENT.

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

                       ARTICLE FOURTEEN HOLDERS' MEETINGS

     SECTION 1401. PURPOSES FOR WHICH MEETINGS MAY BE CALLED.

     If Securities of a series are issuable as Bearer Securities, a meeting of
Holders of Securities of such series may be called at any time and from time to
time pursuant to this Article to make, give or take any request, demand,
authorization, direction, notice, consent, waiver or other action provided by
this Indenture to be made, given or taken by Holders of Securities of such
series.

     SECTION 1402. CALL, NOTICE AND PLACE OF MEETINGS.

     (a) The Trustee may at any time call a meeting of Holders of Securities of
any series for any purpose specified in Section 1401, to be held at such time
and at such place in the Borough of Manhattan, The City of New York, or in
London as the Trustee shall determine. Notice of every meeting of Holders of
Securities of any series, setting forth the time and the place of such meeting
and in general terms the action proposed to be taken at such meeting, shall be
given, in the manner provided in Section 1705, not less than 21 nor more than
120 days prior to the date fixed for the meeting.

     (b) In case at any time the Company, pursuant to a Board Resolution, or the
Holders of at least 10% in principal amount of the Outstanding Securities of any
series shall have requested the Trustee to call a meeting of the Holders of
Securities of such series for any purpose specified in Section 1401, by written
request setting forth in reasonable detail the action proposed to be taken at
the meeting, and the Trustee shall not have made the first publication of the
notice of such meeting within 21 days after receipt of such request or shall not
thereafter proceed to cause the meeting to be held as provided herein, then the
Company or the Holders of Securities of such series in the amount above
specified, as the case may be, may determine the time and the place in the
Borough of Manhattan, The City of New York, or in London for such

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

     SECTION 1403. PERSONS ENTITLED TO VOTE AT MEETINGS.

     To be entitled to vote at any meeting of Holders a Person shall (a) be a
Holder of one or more Securities or (b) be a Person appointed by an instrument
in writing as proxy by a Holder of one or more Securities. The only Persons who
shall be entitled to be present or to speak at any meeting of Holders shall be
the Persons entitled to vote at such meeting and their counsel and any
representatives of the Trustee and its counsel and any representatives of the
Company and its counsel.

     SECTION 1404. QUORUM; ACTION.

     The Persons entitled to vote a majority in principal amount of the
Outstanding Securities of a series shall constitute a quorum for a meeting of
Holders of Securities of such series. In the absence of a quorum within 30
minutes of the time appointed for any such meeting, the meeting shall, if
convened at the request of Holders of Securities of such series, be dissolved.
In any other case the meeting may be adjourned for a period of not less than 10
days as determined by the chairman of the meeting prior to the adjournment of
such meeting. In the absence of a quorum at any such adjourned meeting, such
adjourned meeting may be further adjourned for a period of not less than 10 days
as determined by the chairman of the meeting prior to the adjournment of such
adjourned meeting. Notice of the reconvening of any adjourned meeting shall be
given as provided in Section 1402(a), except that such notice need be given only
once not less than five days prior to the date on which the meeting is scheduled
to be reconvened. Notice of the reconvening of an adjourned meeting shall state
expressly the percentage, as provided above, of the principal amount of the
Outstanding Securities of such series which shall constitute a quorum.

     Except as limited by Section 512 or the proviso to the first paragraph of
Section 902, any resolution presented to a meeting (or adjourned meeting duly
reconvened at which a quorum is present as aforesaid) may be adopted by the
affirmative vote of the Holders of a majority in principal amount of the
Outstanding Securities of that series; provided, however, that, any resolution
with respect to any request, demand, authorization, direction, notice, consent,
waiver or other action which this Indenture expressly provides may be made,
given or taken by the Holders of a specified percentage, which is less than a
majority, in principal amount of the Outstanding Securities of a series may be
adopted at a meeting (or an adjourned meeting duly reconvened and at which a
quorum is present as aforesaid) by the affirmative vote of the Holders of such
specified percentage in principal amount of the Outstanding Securities of that
series.

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

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     SECTION 1405. DETERMINATION OF VOTING RIGHTS; CONDUCT AND ADJOURNMENT OF
MEETINGS.

     (a) Notwithstanding any other provisions of this Indenture, the Trustee may
make such reasonable regulations as it may deem advisable for any meeting of
Holders of Securities of a series in regard to proof of the holding of
Securities of such series and of the appointment of proxies and in regard to the
appointment and duties of inspectors of votes, the submission and examination of
proxies, certificates and other evidence of the right to vote, and such other
matters concerning the conduct of the meeting as it shall deem appropriate.
Except as otherwise permitted or required by any such regulations, the holding
of Securities shall be proved in the manner specified in Section 1503 and the
appointment of any proxy shall be proved in the manner specified in Section 1503
or by having the signature of the Person executing the proxy witnessed or
guaranteed by any trust company, bank or banker authorized by Section 1503 to
certify to the holding of Bearer Securities. Such regulations may provide that
written instruments appointing proxies, regular on their face, may be presumed
valid and genuine without the proof specified in Section 1503 or other proof.

     (b) The Trustee shall, by an instrument in writing, appoint a temporary
chairman of the meeting, unless the meeting shall have been called by the
Company or by Holders of Securities as provided in Section 1402(b), in which
case the Company or the Holders of Securities of the series calling the meeting,
as the case may be, shall in like manner appoint a temporary chairman. A
permanent chairman and a permanent secretary of the meeting shall be elected by
vote of the Persons entitled to vote a majority in principal amount of the
Outstanding Securities of such series represented at the meeting.

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

     (d) Any meeting of Holders of Securities of any series duly called pursuant
to Section 1402 at which a quorum is present may be adjourned from time to time
by Persons entitled to vote a majority in principal amount of the Outstanding
Securities of such series represented at the meeting; and the meeting may be
held as so adjourned without further notice.

     SECTION 1406. COUNTING VOTES AND RECORDING ACTION OF MEETINGS.

         The vote upon any resolution submitted to any meeting of Holders of
Securities of any series shall be by written ballots on which shall be
subscribed the signatures of the Holders of Securities of such series or of
their representatives by proxy and the principal amounts and serial numbers of
the Outstanding Securities of such series held or represented by them. The
permanent chairman of the meeting shall appoint two inspectors of votes who
shall count all votes cast at the meeting for or against any resolution and who
shall make and file with the

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secretary of the meeting their verified written reports in duplicate of all
votes cast at the meeting. A record, at least in duplicate, of the proceedings
of each meeting of Holders of Securities of any series shall be prepared by the
secretary of the meeting and there shall be attached to said record the original
reports of the inspectors of votes on any vote by ballot taken thereat and
affidavits by one or more persons having knowledge of the facts setting forth a
copy of the notice of the meeting and showing that said notice was given as
provided in Section 1402 and, if applicable, Section 1404. Each copy shall be
signed and verified by the affidavits of the permanent chairman and secretary of
the meeting and one such copy shall be delivered to the Company, and another to
the Trustee to be preserved by the Trustee, the latter to have attached thereto
the ballots voted at the meeting. Any record so signed and verified shall be
conclusive evidence of the matters therein stated.

                    ARTICLE FIFTEEN CONVERSION OF SECURITIES

     SECTION 1501. APPLICABILITY OF ARTICLE.

     The provisions of this Article shall be applicable to the Securities of any
series which are convertible into Common Stock of the Company or, if so provided
in a Board Resolution, Officers' Certificate or executed supplemental indenture
referred to in Sections 201 and 301 by or pursuant to which the form and terms
of the Securities of such series were established, into Preferred Stock, other
Securities of the Company or cash in lieu of any of the foregoing, as and to the
extent provided by the terms of the Securities of such series.

     SECTION 1502. EXERCISE OF CONVERSION PRIVILEGE.

     In order to exercise the conversion privilege, the Holder of any Security
to be converted shall surrender such Security to the Conversion Agent at any
time during usual business hours at its office or agency maintained for the
purpose as provided in this Indenture, accompanied by a fully executed written
notice, in substantially the form set forth on the reverse of the Security, that
the Holder elects to convert such Security or a stated portion thereof
constituting a multiple of $1,000 in principal amount, and, if such Security is
surrendered for conversion during the period between the close of business on
any record date for such Security and the opening of business on the related
Interest Payment Date and has not been called for redemption on a Redemption
Date within such period (or on such Interest Payment Date), accompanied also by
payment of an amount equal to the interest payable on such Interest Payment Date
on the portion of the principal amount of the Security being surrendered for
conversion. Such notice shall also state the name or names (and address) in
which the certificate or certificates for shares of Common Stock shall be issued
(or to whom payment in cash in lieu of Common Stock shall be made). Securities
surrendered for conversion shall (if so required by the Company or the
Conversion Agent) be duly endorsed by, or be accompanied by a written instrument
or instruments of transfer in form satisfactory to the Company and the
Conversion Agent duly executed by, the Holder or his attorney duly authorized in
writing. As promptly as practicable after the receipt of such notice and the
surrender of such Security as aforesaid, the Company shall, subject to the
provisions of Section 1507, issue and deliver at such office or agency to such
Holder, or on his written order, a certificate or certificates for the number of
full shares of

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Common Stock issuable on conversion of such Security in accordance with the
provisions of such Security and cash, as provided in Section 1503, in respect of
any fraction of a share of Common Stock otherwise issuable upon such conversion
or, if so provided in a Board Resolution, Officers' Certificate or executed
supplemental indenture referred to in Sections 201 and 301 by or pursuant to
which the form and terms of the Securities of such series were established, cash
in lieu of shares of Common Stock. Such conversion shall be at the Conversion
Price in effect, and shall be deemed to have been effected, immediately prior to
the close of business on the date (herein called the "Date of Conversion") on
which such notice in proper form shall have been received by the Conversion
Agent and such Security shall have been surrendered as aforesaid, and the Person
or Persons in whose name or names any certificate or certificates for shares of
Common Stock shall be issuable, if any, upon such conversion shall be deemed to
have become on the Date of Conversion the holder or holders of record of the
shares represented thereby; provided, however, that any such surrender on any
date when the stock transfer books of the Company shall be closed shall
constitute the Person or Persons in whose name or names the certificate or
certificates for such shares are to be issued, if any, as the record holder or
holders thereof for all purposes at the opening of business on the next
succeeding day on which such stock transfer books are open but such conversion
shall nevertheless be at the Conversion Price in effect at the close of business
on the date when such Security shall have been so surrendered with the
conversion notice in proper form. In the case of conversion of a portion, but
less than all, of a Security, the Company shall execute, and the Trustee shall
authenticate and deliver to the Holder thereof, at the expense of the Company, a
Security or Securities in the aggregate principal amount of the unconverted
portion of the Security surrendered. Except as otherwise expressly provided in
this Indenture, no payment or adjustment shall be made for interest accrued on
any Security (or portion thereof) converted or for dividends or distributions on
any Common Stock issued upon conversion of any Security. The right, if any, of a
Holder of any Security to cause the Company to redeem, purchase or repay such
Security shall terminate upon receipt by the Company of any notice of conversion
of such Security.

     SECTION 1503. FRACTIONAL INTERESTS.

     No fractions of shares or scrip representing fractions of shares shall be
issued upon conversion of Securities. If more than one Security shall be
surrendered for conversion at one time by the same Holder, the number of full
shares which shall be issuable upon conversion thereof shall be computed on the
basis of the aggregate principal amount of the Securities so surrendered. If any
fraction of a share of Common Stock would, except for the provisions of this
Section 1503, be issuable on the conversion of any Security or Securities, the
Company shall make payment in lieu thereof in cash equal to the value of such
fraction computed on the basis of the Last Sale Price of one share of Common
Stock on the most recent Trading Day prior to the Date of Conversion. "Last Sale
Price" on any Trading Day shall mean (i) the closing price regular way (or, if
no closing price is reported the average of the bid and asked prices) as
reported on the New York Stock Exchange Composite Tape, or (ii) if on such
Trading Day the Common Stock is not listed or admitted to trading on such
exchange, the closing price regular way (or, if no closing price is reported the
average of the bid and asked prices) on the principal national securities
exchange on which the Common Stock is listed or admitted to trading, or (iii)

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if not listed or admitted to trading on any national securities exchange on such
Trading Day, then the average of the closing bid and asked prices as reported
through the National Association of Securities Dealers, Inc. on its NASDAQ
National Market or other NASDAQ market or through a similar organization if
NASDAQ is no longer reporting information, or (iv) if the Common Stock is not
listed or admitted to trading on any national securities exchange or quoted on
such National Market or other NASDAQ market on such Trading Day, then the
average of the closing bid and asked prices in the over-the-counter market as
furnished by any New York Stock Exchange member firm selected from time to time
by the Company for that purpose or (v) if not quoted by any such organization on
such Trading Day, the fair value of such Common Stock on such Trading Day, as
determined by the Board of Directors. The term "Trading Day" shall mean each
Monday, Tuesday, Wednesday, Thursday and Friday, other than any day on which
securities are not traded on any of the above mentioned exchanges or in such
markets.

     SECTION 1504. ADJUSTMENT OF CONVERSION PRICE.

     The conversion price or rate (herein called the "Conversion Price") for a
series of Securities shall be as set forth in a Board Resolution, Officers'
Certificate or executed supplemental indenture referred to in Sections 201 and
301 by or pursuant to which the form and terms of the Securities of such series
were established, and, except as otherwise provided therein, shall be subject to
adjustment from time to time as follows:

     (a) In case the Company shall (1) pay a dividend or make a distribution in
shares of Common Stock on the Common Stock, (2) subdivide its outstanding shares
of Common Stock into a greater number of shares, (3) combine its outstanding
shares of Common Stock into a smaller number of shares or (4) issue by
reclassification of its Common Stock any shares of capital stock of the Company,
the Conversion Price in effect immediately prior to such action shall be
adjusted so that the Holder of any Security thereafter surrendered for
conversion shall be entitled to receive the number of shares of Common Stock or
other capital stock of the Company which he would have owned immediately
following such action had such Security been converted immediately prior
thereto. An adjustment made pursuant to this subsection (a) shall become
effective immediately, except as provided in subsection (e) below, after the
record date in the case of a dividend or distribution and shall become effective
immediately after the effective date in the case of a subdivision, combination
or reclassification. If as a result of an adjustment made pursuant to this
subsection (a), the Holder of any Security thereafter surrendered for conversion
shall become entitled to receive shares of two or more classes of capital stock
(including shares of Common Stock and other capital stock) of the Company, the
Board of Directors (whose determination shall be conclusive and shall be
described in a statement filed with the Trustee) shall determine the allocation
of the adjusted Conversion Price between or among shares of such classes of
capital stock or shares of Common Stock and other capital stock.

     (b) In case the Company shall issue rights or warrants to all holders of
Common Stock entitling them (for a period not exceeding 45 days from the date of
such issuance) to subscribe for or purchase shares of Common Stock at a price
per share less than the current market price per share (as determined pursuant
to subsection (d) below) of the Common Stock on

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the record date mentioned below, the Conversion Price shall be adjusted to a
price, computed to the nearest cent, so that the same shall equal the price
determined by multiplying;

          (1) the Conversion Price in effect immediately prior to the date of
     issuance of such rights or warrants by a fraction, of which

          (2) the numerator shall be (A) the number of shares of Common Stock
     outstanding on the date of issuance of such rights or warrants, immediately
     prior to such issuance, plus (B) the number of shares which the aggregate
     offering price of the total number of shares so offered for subscription or
     purchase would purchase at such current market price (determined by
     multiplying such total number of shares by the exercise price of such
     rights or warrants and dividing the product so obtained by such current
     market price), and of which

          (3) the denominator shall be (A) the number of shares of Common Stock
     outstanding on the date of issuance of such rights or warrants, immediately
     prior to such issuance, plus (B) the number of additional shares of Common
     Stock which are so offered for subscription or purchase.

     Such adjustment shall become effective immediately, except as provided in
subsection (e) below, after the record date for the determination of holders
entitled to receive such rights or warrants.

     (c) In case the Company shall distribute to substantially all holders of
Common Stock evidences of indebtedness, equity securities (including equity
interests in the Company's Subsidiaries) other than Common Stock or other assets
(other than cash dividends paid out of surplus of the Company), or shall
distribute to substantially all holders of Common Stock rights or warrants to
subscribe for securities (other than those referred to in subsection (b) above)
then in each such case the Conversion Price shall be adjusted so that the same
shall equal the price determined by multiplying the Conversion Price in effect
immediately prior to the date of such distribution by a fraction of which the
numerator shall be the current market price per share (determined as provided in
subsection (d) below) of the Common Stock on the record date mentioned below
less the then fair market value (as determined by the Board of Directors, whose
determination shall, if made in good faith, be conclusive evidence of such fair
market value) of the portion of the assets so distributed or of such
subscription rights or warrants applicable to one share of Common Stock and of
which the denominator shall be such current market price per share of the Common
Stock. Such adjustment shall become effective immediately, except as provided in
subsection (e) below, after the record date for the determination of
stockholders entitled to receive such distribution.

     (d) For the purposes of any computation under subsections (b) and (c)
above, the current market price per share of Common Stock on any date shall be
deemed to be the average of the Last Sale Prices for the 30 consecutive Trading
Days commencing 45 Trading Days before the date in question.

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     (e) In any case in which this Section 1504 shall require that an adjustment
be made immediately following a record date, the Company may elect to defer the
effectiveness of such adjustment (but in no event until a date later than the
effective time of the event giving rise to such adjustment), in which case the
Company shall, with respect to any Security converted after such record date and
before such adjustment shall have become effective, (i) defer paying any cash
payment pursuant to Section 1503 or issuing to the Holder of such Security the
number of shares of Common Stock and other capital stock of the Company issuable
upon such conversion in excess of the number of shares of Common Stock and other
capital stock of the Company issuable thereupon only on the basis of the
Conversion Price prior to adjustment and (ii), not later than five Business Days
after such adjustment shall have become effective, pay to such Holder the
appropriate cash payment pursuant to Section 1503 and issue to such Holder the
additional shares of Common Stock and other capital stock of the Company
issuable on such conversion.

     (f) No adjustment in the Conversion Price shall be required unless such
adjustment would require an increase or decrease of at least 1% of the
Conversion Price; provided, however, that any adjustments which by reason of
this subsection (f) are not required to be made shall be carried forward and
taken into account in any subsequent adjustment and, provided, further, that
adjustment shall be required and made in accordance with the provisions of this
Article Fifteen (other than this subsection (f)) not later than such time as may
be required in order to preserve the tax-free nature of a distribution to the
holders of Securities or Common Stock. All calculations under this Article
Fifteen shall be made to the nearest cent or to the nearest one-hundredth of a
share, as the case may be.

     (g) Whenever the Conversion Price is adjusted as herein provided, the
Company shall promptly (i) file with the Trustee and each Conversion Agent an
Officers' Certificate setting forth the Conversion Price after such adjustment
and setting forth a brief statement of the facts requiring such adjustment,
which certificate shall be conclusive evidence of the correctness of such
adjustment, and (ii) give or cause to be given a notice of such adjustment to
each Holder of Securities in the manner provided in Section 1705.

     Anything in this Section 1504 to the contrary notwithstanding, the Company
shall be entitled to make such reductions in the Conversion Price, in addition
to those required by this Section 1504, as it in its discretion shall determine
to be advisable in order that any stock dividend, subdivision of shares,
distribution of rights or warrants to purchase stock or securities, or
distribution of other assets (other than cash dividends) hereafter made by the
Company to its stockholders shall not be taxable.

     SECTION 1505. CONTINUATION OF CONVERSION PRIVILEGE IN CASE OF MERGER,
CONSOLIDATION OR SALE OF ASSETS.

     If any of the following shall occur, namely: (a) any consolidation or
merger of the Company as a result of which the holders of Common Stock shall be
entitled to receive stock, other securities or other assets (including cash)
with respect to or in exchange for Common Stock or (b) any conveyance, transfer
or lease of the properties and assets of the Company substantially as an
entirety to any Person, then the Company, or such successor or purchasing
Person, as the

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case may be, shall, as a condition precedent to such consolidation, merger,
conveyance, transfer or lease, execute and deliver to the Trustee a supplemental
indenture (which shall conform to the Trust Indenture Act) providing that the
Holder of each convertible Security then Outstanding shall have the right to
convert such Security into the kind and amount of shares of stock and other
securities and property (including cash) receivable upon or in connection with
such consolidation, merger, conveyance, transfer or lease by a holder of the
number of shares of Common Stock issuable upon conversion of such Security
immediately prior to such consolidation, merger, conveyance, transfer or lease.
Such supplemental indenture shall provide for adjustments which shall be as
nearly equivalent as may be practicable to the adjustments provided for in this
Article Fifteen. If, in the case of any such consolidation, merger, conveyance,
transfer or lease, the stock or other securities and property (including cash)
receivable thereupon or in connection therewith by a holder of shares of Common
Stock includes shares of stock or other securities and property (including cash)
of a Person other than the successor or purchasing Person, as the case may be,
in such consolidation, merger, conveyance, transfer or lease, then such
supplemental indenture shall also be executed by such other Person and shall
contain such additional provisions to protect the interests of the Holders of
the Securities as the Board of Directors shall reasonably consider necessary by
reason of the foregoing. The provisions of this Section 1505 shall similarly
apply to successive consolidations, mergers, conveyances, transfer or leases.

     Notice of the execution of each such supplemental indenture shall be given
to each Holder of Securities in the manner provided in Section 1705.

     Neither the Trustee nor any Conversion Agent shall be under any
responsibility to determine the correctness of any provisions contained in any
such supplemental indenture relating either to the kind or amount of shares of
stock or other securities or property (including cash) receivable by Holders of
Securities upon the conversion of their Securities after any such consolidation,
merger, conveyance, transfer or lease or to any adjustment to be made with
respect thereto, but, subject to the provisions of Sections 601 and 603, may
accept as conclusive evidence of the correctness of any such provision, and
shall be protected in relying upon, the Officers' Certificate (which the Company
shall be obligated to file with the Trustee prior the execution of any such
supplemental indenture) with respect thereto.

     SECTION 1506. NOTICE OF CERTAIN EVENTS.

     If:

     (a) the Company shall declare a dividend (or any other distribution)
payable to the holders of Common Stock otherwise than in cash; or

     (b) the Company shall authorize the granting to all holders of Common Stock
of rights to subscribe for or purchase any shares of stock of any class or of
any other rights; or

     (c) the Company shall authorize any reclassification or change of the
Common Stock (other than a subdivision or combination of its outstanding shares
of Common Stock), or any

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consolidation or merger to which the Company is a party and for which approval
of any stockholders of the Company is required, or the conveyance, transfer or
lease of the properties and assets of the Company substantially as an entirety;
or

     (d) there shall be authorized or ordered any voluntary or involuntary
dissolution, liquidation or winding-up of the Company;

     then, the Company shall cause to be filed at the office or agency
maintained for the purpose of conversion of the Securities as provided in
Section 1002, and shall cause to be given to each Holder of Securities, in the
manner provided in Section 1705, at least 20 days before the date hereinafter
specified (or the earlier of the dates hereinafter specified, in the event that
more than one date is specified), a notice stating the date on which (1) a
record is expected to be taken for the purpose of such dividend, distribution or
rights, or if a record is not to be taken, the date as of which the holders of
Common Stock of record to be entitled to such dividend, distribution or rights
are to be determined, or (2) such reclassification, change, consolidation,
merger, conveyance, transfer or lease, dissolution, liquidation or winding-up is
expected to become effective and the date, if any is to be fixed, as of which it
is expected that holders of Common Stock of record shall be entitled to exchange
their shares of Common Stock for securities or other property deliverable upon
such reclassification, change, consolidation, merger, conveyance, transfer or
lease, dissolution, liquidation or winding-up.

     SECTION 1507. TAXES ON CONVERSION.

     The Company will pay any and all documentary, stamp or similar taxes
payable to the United States of America or any political subdivision or taxing
authority thereof or therein in respect of the issue or delivery of shares of
Common Stock on conversion of Securities pursuant thereto; provided, however,
that the Company shall not be required to pay any tax which may be payable in
respect of any transfer involved in the issue or delivery of shares of Common
Stock in a name other than that of the Holder of the Securities to be converted
(or payment of cash in lieu thereof to a Person other than such Holder) and no
such issue or delivery (or payment) shall be made unless and until the Person
requesting such issue or delivery (or payment) has paid to the Company the
amount of any such tax or has established, to the satisfaction of the Company,
that such tax has been paid. The Company extends no protection with respect to
any other taxes imposed in connection with conversion of Securities.

     SECTION 1508. COMPANY TO PROVIDE STOCK.

     The Company shall reserve, free from preemptive rights, out of its
authorized but unissued shares, sufficient shares to provide for the conversion
of convertible Securities from time to time as such Securities are presented for
conversion, provided, however, that nothing contained herein shall be construed
to preclude the Company from satisfying its obligations in respect of the
conversion of Securities by delivery of repurchased shares of Common Stock which
are held in the treasury of the Company.

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     If any shares of Common Stock to be reserved for the purpose of conversion
of Securities hereunder require registration with or approval of any
governmental authority under any Federal or State law before such shares may be
validly issued or delivered upon conversion, then the Company covenants that it
will in good faith and as expeditiously as possible endeavor to secure such
registration or approval, as the case may be; provided, however, that nothing in
this Section 1508 shall be deemed to affect in any way the obligations of the
Company to convert Securities into Common Stock as provided in this Article
Fifteen.

     Before taking any action which would cause an adjustment reducing the
Conversion Price below the then par value, if any, of the Common Stock the
Company will take all corporate action which may, in the opinion of counsel, be
necessary in order that the Company may validly and legally issue fully paid and
non-assessable shares of Common Stock at such adjusted Conversion Price.

     The Company covenants that all shares of Common Stock which may be issued
upon conversion of Securities will upon issue be fully paid and non-assessable
by the Company and free of preemptive rights.

     SECTION 1509. DISCLAIMER OF RESPONSIBILITY FOR CERTAIN MATTERS.

     Neither the Trustee, any Conversion Agent nor any agent of either shall at
any time be under any duty or responsibility to any Holder of Securities to
determine whether any facts exist which may require any adjustment of the
Conversion Price, or with respect to the Officers' Certificate referred to in
Section 1504(g), or with respect to the nature or extent of any such adjustment
when made, or with respect to the method employed, or herein or in any
supplemental indenture provided to be employed, in making the same. Neither the
Trustee, any Conversion Agent nor any agent of either shall be accountable with
respect to the validity or value (or the kind or amount) of any shares of Common
Stock or of any securities or property (including cash), which may at any time
be issued or delivered upon the conversion of any Security, and neither the
Trustee, any Conversion Agent nor any agent of either makes any representation
with respect thereto. Neither the Trustee, any Conversion Agent nor any agent of
either shall be responsible for any failure of the Company to issue, register
the transfer of or deliver any shares of Common Stock or stock certificates or
other securities or property (including cash) upon the surrender of any Security
for the purpose of conversion or, subject to Sections 601 and 603, to comply
with any of the covenants of the Company contained in this Article Sixteen.

     SECTION 1510. RETURN OF FUNDS DEPOSITED FOR REDEMPTION OF CONVERTED
SECURITIES.

     Any funds which at any time shall have been deposited by the Company or on
its behalf with the Trustee or any Paying Agent for the purpose of paying the
principal of and interest, if any, on any of the Securities and which shall not
be required for such purposes because of the conversion of such Securities, as
provided in this Indenture, shall forthwith after such conversion be repaid to
the Company by the Trustee or such Paying Agent.

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                   ARTICLE SIXTEEN SUBORDINATION OF SECURITIES

     SECTION 1601. SECURITIES SUBORDINATE TO SENIOR INDEBTEDNESS.

     The Company covenants and agrees, and each Holder of a Security, by his
acceptance thereof, likewise covenants and agrees, for the benefit of the
holders, from time to time, of Senior Indebtedness, that, to the extent and in
the manner hereinafter set forth in this Article, the Indebtedness represented
by the Securities and the payment of the principal of (and premium, if any, on)
and interest on each and all of the Securities are hereby expressly made
subordinate and subject in right of payment as provided in this Article to the
prior payment in full of all Senior Indebtedness, whether outstanding on the
date of this Indenture or thereafter created, incurred, assumed or guaranteed;
provided, however, that the Securities, the Indebtedness represented thereby and
the payment of the principal of (and premium, if any, on) and interest on the
Securities in all respects shall rank equally with, or prior to, all existing
and future unsecured indebtedness (including, without limitation, Indebtedness)
of the Company that is subordinated to Senior Indebtedness.

     This Article Sixteen shall constitute a continuing offer to all Persons
who, in reliance upon such provisions, become holders of, or continue to hold,
Senior Indebtedness, and such provisions are made for the benefit of the holders
of Senior Indebtedness, and such holders are made obligees hereunder and any one
or more of them may enforce such provisions.

     SECTION 1602. PAYMENT OVER OF PROCEEDS UPON DISSOLUTION, ETC.

     Upon any distribution of Properties of the Company or payment on behalf of
the Company with respect to the Securities in the event of any Insolvency or
Liquidation Proceeding with respect to the Company:

     (a) the holders of Senior Indebtedness shall be entitled to receive payment
in full of such Senior Indebtedness, or provision must be made for such payment,
before the Holders of the Securities are entitled to receive any direct or
indirect payment or distribution of any kind or character, whether in cash,
property or securities (other than Permitted Junior Securities) on account of
principal of (or premium, if any, on) or interest on the Securities or on
account of the purchase or redemption or other acquisition of Securities; and

     (b) any direct or indirect payment or distribution of Properties of the
Company of any kind or character, whether in cash, property or securities (other
than a payment or distribution in the form of Permitted Junior Securities), by
set-off or otherwise, to which the Holders or the Trustee, on behalf of the
Holders, would be entitled but for the provisions of this Article shall be paid
by the Company or by any liquidating trustee or agent or other Person making
such payment or distribution, whether a trustee in bankruptcy, a receiver or
liquidating trustee or otherwise, directly to the holders of Senior Indebtedness
or their representative or representatives or to the trustee or trustees under
any indenture under which any instruments evidencing any of such Senior
Indebtedness may have been issued, ratably according to the aggregate amounts
remaining unpaid on account of the Senior Indebtedness held or represented by
each, to the

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extent necessary to make payment in full of all Senior Indebtedness after giving
effect to any concurrent payment or distribution to the holders of such Senior
Indebtedness; and

     (c) in the event that, notwithstanding the foregoing provisions of this
Section, the Trustee or the Holder of any Security shall have received any
payment or distribution of Properties of the Company of any kind or character,
whether in cash, property or securities, by set-off or otherwise, in respect of
principal of (and premium, if any, on) or interest on the Securities before all
Senior Indebtedness is paid or provided for in full, then and in such event such
payment or distribution (other than a payment or distribution in the form of
Permitted Junior Securities) shall be received and held in trust for and shall
be paid over or delivered forthwith to the trustee in bankruptcy, receiver,
liquidating trustee, custodian, assignee, agent or other Person making payment
or distribution of assets of the Company, to the extent necessary to pay all
Senior Indebtedness in full, after giving effect to any concurrent payment or
distribution to or for the holders of Senior Indebtedness.

     The consolidation of the Company with, or the merger of the Company into,
another Person or the liquidation or dissolution of the Company following the
sale, assignment, conveyance, transfer, lease or other disposition of all or
substantially all its Properties on a consolidated basis to another Person or
group of Affiliated Persons pursuant to, and in compliance with, the terms and
conditions set forth in Article Eight hereof shall not be deemed an Insolvency
or Liquidation Proceeding (requiring the repayment of all Senior Indebtedness in
full as a prerequisite to any payments being made to the Holders) for the
purposes of this Section.

     SECTION 1603. SUSPENSION OF PAYMENT WHEN SENIOR INDEBTEDNESS IN DEFAULT.

     (a) Upon (1) the occurrence of a Payment Event of Default and (2) receipt
by the Trustee of written notice of such occurrence, then no payment or
distribution of any Properties of the Company of any kind or character (other
than Permitted Junior Securities) shall be made by the Company on account of
principal of (or premium, if any, on) or interest on the Securities or on
account of the purchase or redemption or other acquisition of Securities unless
and until such Payment Event of Default shall have been cured or waived in
writing or shall have ceased to exist or such Specified Senior Indebtedness
shall have been paid in full or otherwise discharged, after which (unless
otherwise prohibited by Section 1602 hereof) the Company shall resume making any
and all required payments in respect of the Securities, including any missed
payments.

     (b) Upon (1) the occurrence of a Non-payment Event of Default with respect
to any Specified Senior Indebtedness and (2) receipt by the Trustee and the
Company of written notice of such occurrence from one or more of the holders of
Specified Senior Indebtedness (or their representative), then no payment or
distribution of any Properties of the Company of any kind or character (other
than Permitted Junior Securities) shall be made by the Company on account of any
principal of (or premium, if any, on) or interest on the Securities or on
account of the purchase or redemption or other acquisition of Securities for the
period specified below (the "Payment Blockage Period"). The Payment Blockage
Period will commence upon the earlier of the dates of receipt by the Trustee or
the Company of such notice (the "Payment Blockage

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Notice") from one or more of the holders of such Specified Senior Indebtedness
(or their representative) and shall end on the earliest of (i) 179 days
thereafter, (ii) the date, as set forth in a written notice from the holders of
the Specified Senior Indebtedness (or their representative) to the Company or
the Trustee, on which such Non-payment Event of Default is cured, waived in
writing or ceases to exist or such Specified Senior Indebtedness is discharged
or (iii) the date on which such Payment Blockage Period shall have been
terminated by written notice to the Company or the Trustee from one or more of
the holders (or their representative) initiating such Payment Blockage Period,
after which the Company will resume (unless otherwise prohibited pursuant to the
immediately preceding paragraph or Section 1602 hereof) making any and all
required payments in respect of the Securities, including any missed payments.
In any event, not more than one Payment Blockage Period may be commenced during
any period of 360 consecutive days. No Non-payment Event of Default that existed
or was continuing on the date of delivery of any Payment Blockage Notice to the
Trustee will be, or can be, made the basis for the commencement of a subsequent
Payment Blockage Period.

     (c) In the event that the Trustee or any Holder receives any payment with
respect to any Securities at a time when the Trustee or such Holder, as
applicable, has actual knowledge that such payment is prohibited by the
foregoing provisions of this Section 1603, then and in such event such payment
shall be paid over and delivered forthwith to the Company. In the event that the
Company shall make any payment in respect of the Securities to the Trustee and
the Trustee shall receive written notice of a Payment Event of Default or a
Non-payment Event of Default from one or more of the holders of Specified Senior
Indebtedness (or their representative) prior to making any payment to Holders in
respect of the Securities and prior to 11:00 a.m. Eastern time on the date which
is two Business Days prior to the date upon which by the terms hereof any money
may become payable for any purpose, such payments shall be paid over by the
Trustee and delivered forthwith to the Company.

     SECTION 1604. PAYMENT PERMITTED IF NO DEFAULT.

     Nothing contained in this Article or elsewhere in this Indenture or in any
of the Securities shall prevent the Company, at any time except during the
pendency of any Insolvency or Liquidation Proceeding referred to in Section 1602
hereof or under the conditions described in Section 1603 hereof, from making
payments at any time of principal of (and premium, if any, on) or interest on
the Securities.

     SECTION 1605. SUBROGATION TO RIGHTS OF HOLDERS OF SENIOR INDEBTEDNESS.

     After the payment in full of all Senior Indebtedness, the Holders of the
Securities shall be subrogated (equally and ratably with the holders of all
indebtedness of the Company which by its express terms is subordinated to Senior
Indebtedness to substantially the same extent as the Securities are so
subordinated and which is entitled to like rights of subrogation as a result of
the payments made to the holders of Senior Indebtedness) to the rights of the
holders of Senior Indebtedness to receive payments and distributions of cash,
property and securities applicable to Senior Indebtedness until all amounts
owing on the Securities shall be paid in full. For purposes of such subrogation,
no payments or distributions to the holders of Senior Indebtedness by or on

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behalf of the Company or by or on behalf of the Holders by virtue of this
Article which otherwise would have been made to the Holders shall, as between
the Company, its creditors other than holders of Senior Indebtedness, and the
Holders of the Securities, be deemed to be a payment or distribution by the
Company to or on account of the Senior Indebtedness.

     SECTION 1606. PROVISIONS SOLELY TO DEFINE RELATIVE RIGHTS.

     The provisions of this Article are, and are intended solely, for the
purpose of defining the relative rights of the Holders of the Securities on the
one hand and the holders of Senior Indebtedness on the other hand. Nothing
contained in this Article or elsewhere in this Indenture or in the Securities is
intended to or shall (a) impair, as between the Company and the Holders of the
Securities, the obligation of the Company, which is absolute and unconditional,
to pay to the Holders of the Securities the principal of (and premium, if any,
on) and interest on the Securities as and when the same shall become due and
payable in accordance with their terms; or (b) affect the relative rights
against the Company of the Holders of the Securities and creditors of the
Company other than the holders of Senior Indebtedness; or (c) prevent the
Trustee or the Holder of any Security from exercising all remedies otherwise
permitted by applicable law upon default under this Indenture, subject to the
rights, if any, under this Article of the holders of Senior Indebtedness.

     SECTION 1607. TRUSTEE TO EFFECTUATE SUBORDINATION.

     Each Holder of a Security by his acceptance thereof authorizes and directs
the Trustee on his behalf to take such action as may be necessary or appropriate
to effectuate the subordination provided in this Article and appoints the
Trustee as his attorney-in-fact for any and all such purposes, including, in the
event of any Insolvency or Liquidation Proceeding with respect to the Company,
the immediate filing of a claim for the unpaid balance of his Securities
pursuant to this Indenture in the form required in said proceedings and the
causing of said claim to be approved.

     SECTION 1608. NO WAIVER OF SUBORDINATION PROVISION.

     (a) No right of any present or future holder of any Senior Indebtedness to
enforce subordination as herein provided shall at any time in any way be
prejudiced or impaired by any act or failure to act on the part of the Company
or by any act or failure to act by any such holder, or by any non-compliance by
the Company with the terms of this Indenture, regardless of any knowledge
thereof which any such holder may have or be otherwise charged with.

     (b) Without in any way limiting the generality of paragraph (a) of this
Section, the holders of any Senior Indebtedness, in accordance with the terms of
the instrument or agreement evidencing their Senior Indebtedness, may, at any
time and from time to time, without the consent of or notice to the Trustee or
the Holders of the Securities, without incurring responsibility to the Holders
of the Securities and without impairing or releasing the subordination or other
benefits provided in this Article, or the obligations hereunder of the Holders
of the Securities to the holders of Senior Indebtedness, do any one or more of
the following: (1) change the manner, place or terms of payment or extend the
time of payment of,

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or renew, exchange, amend, increase or alter, Senior Indebtedness or the terms
of any instrument evidencing the same or any agreement under which Senior
Indebtedness is outstanding or any liability of any obligor thereon (unless such
change, extension, amendment, increase or other alteration results in such
Indebtedness no longer being Senior Indebtedness as defined in this Indenture);
(2) sell, exchange, release or otherwise deal with any Property pledged,
mortgaged or otherwise securing Senior Indebtedness; (3) settle or compromise
any Senior Indebtedness or any liability of any obligor thereon or release any
Person liable in any manner for the collection of Senior Indebtedness; and (4)
exercise or refrain from exercising any rights against the Company and any other
Person.

     SECTION 1609. NOTICE TO TRUSTEE.

     (a) The Company shall give prompt written notice to the Trustee of any fact
known to the Company which would prohibit the making of any payment to or by the
Trustee in respect of the Securities. Notwithstanding the provisions of this
Article or any other provision of this Indenture, the Trustee shall not be
charged with knowledge of the existence of any facts which would prohibit the
making of any payment to or by the Trustee in respect of the Securities, unless
and until the Trustee shall have received written notice thereof from the
Company or one or more of the holders of Senior Indebtedness (or their
representative), with respect to a Payment Default, or one or more of the
holders of Specified Senior Indebtedness (or their representative), with respect
to a Non-payment Event of Default, or from any trustee, fiduciary or agent
therefor; and, prior to the receipt of any such written notice, the Trustee,
subject to TIA Sections 315(a) through 315(d), shall be entitled in all respects
to assume that no such facts exist; provided, however, that, if the Trustee
shall not have received the notice provided for in this Section prior to 11:00
a.m. Eastern time on the date which is two Business Days prior to the date upon
which by the terms hereof any money may become payable for any purpose
(including, without limitation, the payment of the principal of (and premium, if
any, on) or interest on any Security), then, anything herein contained to the
contrary notwithstanding, the Trustee shall have full power and authority to
receive such money and to apply the same to the purpose for which such money was
received and shall not be affected by any notice to the contrary which may be
received by it on or after 11:00 a.m. Eastern time two Business Days prior to
such payment date.

     (b) Subject to TIA Sections 315(a) through 315(d), the Trustee shall be
entitled to rely on the delivery to it of a written notice by a Person
representing himself to be a holder of Senior Indebtedness (or a trustee,
fiduciary or agent therefor) to establish that such notice has been given by a
holder of Senior Indebtedness (or a trustee, fiduciary or agent therefor). In
the event that the Trustee determines in good faith that further evidence is
required with respect to the right of any Person as a holder of Senior
Indebtedness to participate in any payment or distribution pursuant to this
Article, the Trustee may request such Person to furnish evidence to the
reasonable satisfaction of the Trustee, for the purpose of ascertaining the
Persons entitled to participate in such payment or distribution, the holders of
Senior Indebtedness and other indebtedness of the Company, the amount thereof or
payable thereon, the amount or amounts paid or distributed thereon and all other
facts pertinent thereto or to this Article.

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     SECTION 1610. RELIANCE ON JUDICIAL ORDER OR CERTIFICATE OF LIQUIDATING
AGENT BANK.

     Upon any payment or distribution of assets of the Company referred to in
this Article, the Trustee, subject to TIA Sections 315(a) through 315(d), and
the Holders of the Securities shall be entitled to rely upon any order or decree
entered by any court of competent jurisdiction in which such Insolvency or
Liquidation Proceeding is pending, or a certificate of the trustee in
bankruptcy, receiver, liquidating trustee, custodian, assignee for the benefit
of creditors, agent or other Person making such payment or distribution,
delivered to the Trustee or to the Holders of Securities, for the purpose of
ascertaining the Persons entitled to participate in such payment or
distribution, the holders of Senior Indebtedness and other indebtedness of the
Company, the amount thereof or payable thereon, the amount or amounts paid or
distributed thereon and all other facts pertinent thereto or to this Article.

     SECTION 1611. RIGHTS OF TRUSTEE AS A HOLDER OF SENIOR INDEBTEDNESS;
PRESERVATION OF TRUSTEE'S RIGHTS.

     The Trustee in its individual capacity shall be entitled to all the rights
set forth in this Article with respect to any Senior Indebtedness, which may at
any time be held by it, to the same extent as any other holder of Senior
Indebtedness, and nothing in this Indenture shall deprive the Trustee of any of
its rights as such holder. Nothing in this Article shall apply to claims of, or
payments to, the Trustee under or pursuant to Section 606 hereof.

     SECTION 1612. ARTICLE APPLICABLE TO PAYING AGENTS.

     In case at any time a Paying Agent other than the Trustee shall have been
appointed by the Company and be then acting hereunder, the term "Trustee" as
used in this Article shall in such case (unless the context otherwise requires)
be construed as extending to and including such Paying Agent within its meaning
as fully for all intents and purposes as if such Paying Agent were named in this
Article in addition to or in place of the Trustee; provided, however, that
Section 1611 hereof shall not apply to the Company or any Affiliate of the
Company if it or such Affiliate acts as Paying Agent.

     SECTION 1613. NO SUSPENSION OF REMEDIES.

     Nothing contained in this Article shall limit the right of the Trustee or
the Holders of Securities to take any action to accelerate the maturity of the
Securities pursuant to Article Five hereof or to pursue any rights or remedies
hereunder or under applicable law, except as provided in Article Five hereof.

     SECTION 1614. TRUST MONEY NOT SUBORDINATED.

     Notwithstanding anything contained herein to the contrary, payments from
cash or the proceeds of U.S. Government Obligations held in trust under Article
Thirteen hereof by the Trustee (or other qualifying trustee) and which were
deposited in accordance with the terms of Article Thirteen hereof and not in
violation of Section 1602 or 1603 hereof for the payment of

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principal of (and premium, if any, on) and interest on the Securities shall not
be subordinated to the prior payment of any Senior Indebtedness or subject to
the restrictions set forth in this Article Sixteen, and none of the Holders
shall be obligated to pay over any such amount to the Company or any holder of
Senior Indebtedness or any other creditor of the Company.

                   ARTICLE SEVENTEEN MISCELLANEOUS PROVISIONS

     SECTION 1701. COMPLIANCE CERTIFICATES AND OPINIONS.

     Upon any application or request by the Company to the Trustee to take any
action under any provision of this Indenture, the Company shall furnish to the
Trustee such Officers' Certificate. Each such certificate or opinion shall be
given in the form of an Officers' Certificate, if to be given by an officer of
the Company, or an Opinion of Counsel, if to be given by counsel, and shall
comply with the requirements set forth in this Indenture.

     Every certificate or opinion with respect to compliance with a condition or
covenant provided for in this Indenture (except for certificates provided for in
section 1006) shall include:

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

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

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

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

     SECTION 1702. FORM OF DOCUMENTS DELIVERED TO TRUSTEE.

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

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

                                       88

<PAGE>   95

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

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

     SECTION 1703. ACTS OF HOLDERS; RECORD DATES.

     (a) Any request, demand, authorization, direction, notice, consent, waiver
or other action provided or permitted by this Indenture to be given or made or
taken by Holders may be embodied in and evidenced by one or more instruments of
substantially similar tenor signed by such Holders in person or by an agent duly
appointed in writing or deemed signed pursuant to the policies and procedures of
the Depositary holding the affected Securities, or otherwise. If Securities of a
series are issuable as Bearer Securities, any request, demand, authorization,
direction, notice, consent, waiver or other action provided by this Indenture to
be given or taken by Holders of such series may, alternatively, be embodied in
and evidenced by the record of Holders of Securities of such series voting in
favor thereof, either in person or by proxies duly appointed in writing, at any
meeting of Holders of Securities of such series duly called and held in
accordance with the provisions of Article Fourteen, or a combination of such
instruments and any such record. Except as herein otherwise expressly provided,
such action shall become effective when such instrument or instruments or record
or both are received by or delivered to the Trustee and, where it is hereby
expressly required, by the Company. Such instrument or instruments and any such
record (and the action embodied therein and evidenced thereby) are herein
sometimes referred to as the "Act" of the Holders signing or deemed to be
signing such instrument or instruments and so voting at any such meeting. Proof
of execution of any such instrument or of a writing appointing any such agent or
proxy or of the holding by any Person of a Security, shall be sufficient for any
purpose of this Indenture and (subject to Section 601) conclusive in favor of
the Trustee and the Company or any agent of the Trustee or Company, if made in
the manner provided in this Section. The record of any meeting of Holders of
Securities shall be proved in the manner provided in Section 1406.

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

                                       89

<PAGE>   96

     (c) The Company may, in the circumstances permitted by the Trust Indenture
Act, fix any day as the record date for the purpose of determining the Holders
of Registered Securities of any series entitled to give or take any request,
demand, authorization, direction, notice, consent, waiver or other action, or to
vote on any action, authorized or permitted to be given or taken by Holders of
Securities of such series. If not set by the Company prior to the first
solicitation of a Holder of Securities of such series made by any Person in
respect of any such action, or, in the case of any such vote, prior to such
vote, the record date for any such action or vote shall be the 30th day (or, if
later, the date of the most recent list of Holders required to be provided
pursuant to Section 701) prior to such first solicitation or vote, as the case
may be. With regard to any record date for action to be taken by the Holders of
one or more series of Securities, only the Holders of Securities of such series
on such date (or their duly designated proxies) shall be entitled to give or
take, or vote on, the relevant action.

     (d) The principal amount and serial numbers of Registered Securities held
by any Person, and the date of holding the same, shall be proved by the Security
Register.

     (e) The principal amount and serial numbers of Bearer Securities held by
any Person, and the date of holding the same, may be proved by the production of
such Bearer Securities or by a certificate executed, as depositary, by any trust
company, bank, banker or other depositary, wherever situated, if such
certificate shall be deemed by the Trustee to be satisfactory, showing that at
the date therein mentioned such Person had on deposit with such depositary, or
exhibited to it, the Bearer Securities therein described; or such facts may be
proved by the certificate or affidavit of the Person holding such Bearer
Securities, if such certificate or affidavit is deemed by the Trustee to be
satisfactory. The Trustee and the Company may assume that such ownership of any
Bearer Security continues until (1) another certificate or affidavit bearing a
later date issued in respect of the same Bearer Security is produced, or (2)
such Bearer Security is produced to the Trustee by some other Person, or (3)
such Bearer Security is surrendered in exchange for a Registered Security, or
(4) such Bearer Security is no longer Outstanding. The principal amount and
serial numbers of Bearer Securities held by any Person, and the date of holding
the same, may also be proved in any other manner which the Trustee deems
sufficient.

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

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

                                       90

<PAGE>   97

     SECTION 1704. NOTICES, ETC., TO TRUSTEE AND COMPANY.

     Any request, demand, authorization, direction, notice, consent, waiver or
Act of Holders or other document provided or permitted by this Indenture to be
made upon, given or furnished to, or filed with,

          (1) the Trustee by any Holder or by the Company shall be sufficient
     for every purpose hereunder if made, given, furnished or filed in writing
     and delivered in person or mailed by certified or registered mail, return
     receipt requested, to or with the Trustee at its Corporate Trust Office,
     Attention: Corporate Trust Department, or

          (2) the Company by the Trustee or by any Holder shall be sufficient
     for every purpose hereunder (unless otherwise herein expressly provided) if
     in writing and delivered in person, by facsimile transmission (Secretary
     (601) 446-1410) or mailed, by registered mail, return receipt requested,
     first-class postage prepaid, to the Company addressed to it at the address
     of its principal office specified in the first paragraph of this instrument
     to the attention of the Chief Financial Officer, with a copy to be sent to
     Callon Petroleum Company, 200 North Canal Street, Natchez, Mississippi
     39120, Facsimile No. (601) 446-1410, Attention: Controller, or at any other
     address or facsimile number previously furnished in writing to the Trustee
     by the Company.

     SECTION 1705. NOTICE TO HOLDERS; WAIVER.

     Except as otherwise expressly provided herein, where this Indenture
provides for notice to Holders of Securities of any event,

          (1) such notice shall be sufficiently given to Holders of Registered
     Securities if in writing and mailed, first-class postage prepaid, to each
     Holder of a Registered Security affected by such event, at the address of
     such Holder as it appears in the Security Register, not later than the
     latest date (if any), and not earlier than the earliest date (if any),
     prescribed for the giving of such notice; and

          (2) such notice shall be sufficiently given to Holders of Bearer
     Securities if published in an Authorized Newspaper in The City of New York
     and in such other city or cities as may be specified in such Securities on
     a Business Day at least twice, the first such publication to be not earlier
     than the earliest date (if any), and not later than the latest date (if
     any), prescribed for the giving of such notice.

     In any case where notice to Holders of Registered Securities is given by
mail, neither the failure to mail such notice, nor any defect in any notice so
mailed, to any particular Holder of a Registered Security shall affect the
sufficiency of such notice with respect to other Holders of Registered
Securities or the sufficiency of any notice to Holders of Bearer Securities
given as provided herein. In case by reason of the suspension of regular mail
service or by reason of any other cause it shall be impracticable to give such
notice to Holders of Registered Securities by

                                       91

<PAGE>   98

mail, then such notification as shall be made with the approval of the Trustee
shall constitute sufficient notice to such Holders for every purpose hereunder.

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

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

     SECTION 1706. LANGUAGE OF NOTICES, ETC.

     Any request, demand, authorization, direction, notice, consent or waiver
required or permitted under this Indenture shall be in the English language.

     SECTION 1707. CONFLICT WITH TRUST INDENTURE ACT.

     This Indenture is subject to and shall be governed by the provisions of the
Trust Indenture Act that are required to be part of this Indenture. If any
provision hereof limits, qualifies or conflicts with a provision of the Trust
Indenture Act which is required under the Trust Indenture Act to be a part of
and govern this Indenture, the latter provision shall control. If any provision
of this Indenture modifies or excludes any provision of the Trust Indenture Act
which may be so modified or excluded, the latter provision shall be deemed to
apply to this Indenture as so modified or to be excluded, as the case may be.

     SECTION 1708. EFFECT OF HEADINGS AND TABLE OF CONTENTS.

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

     SECTION 1709. SUCCESSORS AND ASSIGNS.

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

                                       92

<PAGE>   99

     SECTION 1710. SEPARABILITY CLAUSE.

     In case any provision in this Indenture or the Securities or coupons shall
be invalid, illegal or unenforceable, the validity, legality and enforceability
of the remaining provisions shall not in any way be affected or impaired thereby
and such provisions shall be given effect to the fullest extent permitted by
law.

     SECTION 1711. BENEFITS OF INDENTURE.

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

     SECTION 1712. GOVERNING LAW.

     THIS INDENTURE AND THE SECURITIES AND COUPONS SHALL BE GOVERNED BY AND
CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK APPLICABLE TO
AGREEMENTS MADE OR INSTRUMENTS ENTERED INTO AND, IN EACH CASE, PERFORMED IN SAID
STATE.

     SECTION 1713. LEGAL HOLIDAYS.

     In any case where any Interest Payment Date, Redemption Date or Stated
Maturity of any Security or the last date for conversion of any Security shall
not be a Business Day at any Place of Payment, then (notwithstanding any other
provision of this Indenture or of the Securities or coupons (other than a
provision in the Securities of any series which specifically states that such
provision shall apply in lieu of this Section)) payment of interest or principal
(and premium, if any) need not be made at such Place of Payment on such date and
such conversion need not be made at such Place of Payment on such date, but may
be made on the next succeeding Business Day at such Place of Payment with the
same force and effect as if made on the Interest Payment Date or Redemption
Date, or at the Stated Maturity or on the last date for conversion the case may
be, provided that no interest shall accrue on the amount so payable for the
period from and after such date.

     SECTION 1714. NO RECOURSE AGAINST OTHERS.

     A director, officer, employee, stockholder, incorporator or Affiliate, as
such, past, present or future, of the Company shall not have any personal
liability under the Securities or this Indenture by reason of his or its status
as a director, officer, employee, stockholder, incorporator or Affiliate or any
liability for any obligations of the Company under the Securities or this
Indenture or for any claim based on, in respect of or by reason of such
obligations or their creation. Each Holder, by accepting any of the Securities,
waives and releases all such liability to the extent permitted by applicable
law.

                                       93

<PAGE>   100

     SECTION 1715. EXECUTION IN COUNTERPARTS.

     This instrument may be executed in any number of counterparts, each of
which so executed shall be deemed to be an original, but all such counterparts
shall together constitute but one and the same instrument.

     SECTION 1716. NO ADVERSE INTERPRETATION OF OTHER AGREEMENTS.

     This Indenture may not be used to interpret another indenture, loan or debt
agreement of the Company or any of its Subsidiaries. Any such indenture, loan or
debt agreement may not be used to interpret this Indenture.

                                       94

<PAGE>   101

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

                                       CALLON PETROLEUM COMPANY

                                       By: /s/ JOHN S. WEATHERLY
                                           ---------------------------
                                       Name:   John S. Weatherly
                                             -------------------------
                                       Title:  Senior Vice President
                                               and CFO
                                              ------------------------

                                       AMERICAN STOCK TRANSFER & TRUST
                                       COMPANY, AS TRUSTEE

                                       By: /s/ HERB LEMMER
                                           ---------------------------
                                       Name:   Herb J. Lemmer
                                             -------------------------
                                       Title:  Vice President
                                              ------------------------

<PAGE>   102

                                    EXHIBIT A

      FORM OF CERTIFICATE TO BE GIVEN BY BENEFICIAL OWNER OF INTEREST IN A
                           TEMPORARY GLOBAL SECURITY

                            CALLON PETROLEUM COMPANY

                              [Title of Securities]

                               (the "Securities")

     This is to certify that as of the date hereof, and except as set forth
below, the above-captioned Securities held by you for our account (i) are owned
by person(s) that are not citizens or residents of the United States, domestic
partnerships, domestic corporations or any estate or trust the income of which
is subject to United States Federal income taxation regardless of its source
("United States persons"), (ii) are owned by United States person(s) that are
(A) foreign branches of United States financial institutions (as defined in U.S.
Treasury Regulations Section 1.165-12(c)(1)(v)) ("financial institutions")
purchasing for their own account or for resale, or (B) United States person(s)
who acquired Securities through the foreign branches of the United States
financial institutions and who hold the Securities through such United States
financial institutions on the date hereof (and in either case (A) or (B), each
such United States financial institution hereby agrees, on its own behalf or
through its agent, to comply with the requirements of Section 165(j)(3)(A), (B)
or (C) of the Internal Revenue Code of 1986 as amended, and the regulations
thereunder), or (iii) are owned by United States or foreign financial
institution(s) for purposes of resale during the restricted period (as defined
in U.S. Treasury Regulations Section 1.163-5(c)(2)(i)(D)(7)), and in addition if
the owner of the Securities is a United States or foreign financial institution
described in clause (iii) above (whether or not also described in clause (i) or
(ii)), this is to further certify that such financial institution has not
acquired the Securities for purposes of resale directly or indirectly to a
United States person or to a person within the United States or its possessions.

     If the Securities are of the category contemplated in Section 230.903(c)(3)
of Regulation S under the Securities Act of 1933, as amended (the "Act"), then
this is also to certify that, except as set forth below (i) in the case of debt
securities, the Securities are beneficially owned by (a) non-U.S. person(s) or
(b) U.S. person(s) who purchased the Securities in transactions which did not
require registration under the Act; or (ii) in the case of equity securities,
the Securities are owned by (x) non-U.S. person(s) (and such person(s) are not
acquiring the Securities for the account or benefit of U.S. person(s)), or (y)
U.S. person(s) who purchased the Securities in a transaction which did not
require registration under the Act. If this certification is being delivered in
connection with the exercise of warrants pursuant to Section 230.902(m) of
Regulation S under the Act, then this is further to certify that, except as set
forth below, the Securities are being exercised by and on behalf of non-U.S.
person(s). As used in this paragraph, the term "U.S. person" has the meaning
given to it by Regulation S under the Act. As used herein, "United States" or
"U.S." means the United States of America (including the States and

<PAGE>   103

District of Columbia); and its "possessions" include Puerto Rico, the U.S.
Virgin Islands, Guam, American Samoa, Wake Island and the Northern Mariana
Islands.

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

     This certification excepts and does not relate to $_________ of such
interest in the above Securities in respect of which we are not able to certify
and as to which we understand exchange and delivery of definitive Securities
(or, if relevant, exercise of any rights or collection of any interest) cannot
be made until we do so certify.

     We understand that this certification is required in connection with
certain tax laws and, if applicable, certain securities laws of the United
States. In connection therewith, if administrative or legal proceedings are
commenced or threatened in connection with which this certification is or would
be relevant, we irrevocably authorize you to produce this certification to any
interested party in such proceedings.

     *Dated:                ,     .
             ---------------  ----

                                       NAME OF PERSON MAKING CERTIFICATION

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

----------
* To be dated no earlier than the Certification Date.

<PAGE>   104

                                    EXHIBIT B

         FORM OF CERTIFICATION TO BE GIVEN BY THE EURO-CLEAR OPERATOR OR
                                   CEDEL S.A.

                            CALLON PETROLEUM COMPANY

                              [Title of Securities]

                               (the "Securities")

     This is to certify that, based solely on certifications we have received in
writing, by tested telex or by electronic transmission from member organizations
appearing in our records as persons being entitled to a portion of the principal
amount set forth below (our "Member Organizations") substantially to the effect
set forth in the Indenture, dated as of _____________, ____, between Callon
Petroleum Company and ________________, as Trustee, as of the date hereof, [ ]
principal amount of the above-captioned Securities (i) is owned by persons that
are not citizens or residents of the United States, domestic partnerships,
domestic corporations or any estate or trust the income of which is subject to
United States Federal income taxation regardless of its source ("United States
persons"), (ii) is owned by United States persons that are (A) foreign branches
of United States financial institutions (as defined in U.S. Treasury Regulations
Section 1.16512(c)(1)(v)) ("financial institutions") purchasing for their own
account or for resale, or (B) United States persons who acquired the Securities
through foreign branches of United States financial institutions and who hold
the Securities through such United States financial institutions on the date
hereof (and in either case (A) or (B), each such United States financial
institution has agreed, on its own behalf or through its agent, that it will
comply with the requirements of Section 165(1)(3)(A), (B) or (C) of the Internal
Revenue Code of 1986, as amended, and the regulations thereunder), or (iii) is
owned by United States or foreign financial institutions for purposes of resale
during the restricted period (as defined in U.S. Treasury Regulations Section
1.1635(c)(2)(i)(D)(7)), and to the further effect that the United States or
foreign financial institutions described in clause (iii) above (whether or not
also described in clause (i) or (ii)) have certified that they have not acquired
the Securities for purposes of resale directly or indirectly to a United States
person or to a person within the United States or its possessions.

     If the Securities are of the category contemplated in Section 230.903(c)(3)
of Regulation S under the Securities Act of 1933, as amended, then this is also
to certify with respect to such principal amount of Securities set forth above
that, except as set forth below, we have received in writing, by tested telex or
by electronic transmission, from our Member Organizations entitled to a portion
of such principal amount, certifications with respect to such portion,
substantially to the effect set forth in the Indenture.

     We further certify (i) that we are not making available herewith for
exchange (or, if relevant, exercise of any rights or collection of any interest)
any portion of the temporary global Security excepted in such certifications and
(ii) that as of the date hereof we have not received

<PAGE>   105

any notification from any of our Member Organizations to the effect that the
statements made by such Member Organizations with respect to any portion of the
part submitted herewith for exchange (or, if relevant, exercise of any rights or
collection of any interest) are no longer true and cannot be relied upon as of
the date hereof.

     We understand that this certification is required in connection with
certain tax laws and, if applicable, certain securities laws of the United
States. In connection therewith, if administrative or legal proceedings are
commenced or threatened in connection with which this certification is or would
be relevant, we irrevocably authorize you to produce this certification or a
copy hereof to any interested party in such proceedings.

     Dated:                    ,      .
            -------------------  -----

     (dated the Exchange Date or the Interest Payment Date)

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

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

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