<PAGE>
                                                                     EXHIBIT 4.2


                       CONSOLIDATED NATURAL GAS COMPANY
                                    ISSUER

                                      AND

                 BANK ONE TRUST COMPANY, NATIONAL ASSOCIATION
                                    TRUSTEE

                                   INDENTURE

                         DATED AS OF DECEMBER __, 2000


                        JUNIOR SUBORDINATED DEBENTURES
<PAGE>

                        Reconciliation and tie between
            Trust Indenture Act of 1939 (the "Trust Indenture Act")
                                and Indenture


Trust Indenture
 Act Section                Indenture Section

Section 310(a)(1)                 7.9
(a)(2)                            7.9
(b)                               7.8
Section 312(a)                    5.1
(b)                               5.2
(c)                               5.2
Section 313(a)                    5.4
(b)(2)                            5.4
(c)                               5.4
(d)                               5.4
Section 314(a)                    5.3
(c)(1)                            2.1
(c)(2)                            2.1
(e)                               2.1
(f)                               2.1
Section 316(a) (last sentence)    8.4
(a)(1)(A)                         6.1, 6.6
(a)(1)(B)                         6.6
(b)                               6.4
Sentence 317(a)(1)                6.2
(a)(2)                            6.2
(b)                               4.4
Section 318(a)                   15.6


_____________

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

<PAGE>

                                TABLE OF CONTENTS

<TABLE>
<S>                                                                                                             <C>
ARTICLE I  DEFINITIONS.......................................................................................     1
   1.1   Certain Terms Defined...............................................................................     1

ARTICLE II ISSUE, DESCRIPTION, EXECUTION, REGISTRATION OF TRANSFER  AND EXCHANGE OF SECURITIES...............    11
   2.1   Amount, Series and Delivery of Securities...........................................................    11
   2.2   Form of Securities and Trustee's Certificate........................................................    16
   2.3   Denominations of and Payment of Interest on Securities..............................................    17
   2.4   Execution of Securities.............................................................................    18
   2.5   Registration, Transfer and Exchange of Securities...................................................    19
   2.6   Temporary Securities................................................................................    21
   2.7   Mutilated, Destroyed, Lost or Stolen Securities.....................................................    21
   2.8   Cancellation and Destruction of Surrendered Securities..............................................    22
   2.9   Authenticating Agents...............................................................................    22
   2.10     Deferrals of Interest Payment Dates..............................................................    24
   2.11     Right of Set-off.................................................................................    24
   2.12     Shortening or Extension of Stated Maturity.......................................................    24
   2.13     Agreed Tax Treatment.............................................................................    25
   2.14     CUSIP Numbers....................................................................................    25

ARTICLE III REDEMPTION OF SECURITIES.........................................................................    25
   3.1   Applicability of Article............................................................................    25
   3.2   Mailing of Notice of Redemption.....................................................................    25
   3.3   When Securities Called for Redemption Become Due and Payable........................................    27

ARTICLE IV PARTICULAR COVENANTS OF THE COMPANY...............................................................    27
   4.1   Payment of Principal of and Interest on Securities..................................................    28
   4.2   Maintenance of Offices or Agencies for Registration of Transfer, Exchange and Payment
         of Securities.......................................................................................    28
   4.3   Appointment to Fill a Vacancy In The Office of Trustee..............................................    28
   4.4   Duties of Paying Agent..............................................................................    28
   4.5   Officers' Certificate as to Defaults; Notices of Certain............................................    30
   4.6   Waiver of Covenants.................................................................................    30
   4.7   Additional Tax Sums.................................................................................    30
   4.8   Additional Covenants................................................................................    31
   4.9   Calculation of Original Issue Discount..............................................................    31
   4.10     Calculation of Original Issue Discount...........................................................    31
</TABLE>

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<TABLE>
<S>                                                                                                             <C>
ARTICLE V SECURITYHOLDERS' LISTS AND REPORTS BY THE COMPANY  AND THE TRUSTEE.................................    32
   5.1   Company to Furnish Trustee Information as to the Names and Addresses of Securityholders.............    32
   5.2   Trustee to Preserve Information as to the Names and Addresses of Securityholders Received by It.....    32
   5.3   Annual and Other Reports to be Filed by Company with Trustee........................................    32
   5.4   Trustee to Transmit Annual Report to Securityholders................................................    33

ARTICLE VI REMEDIES OF THE TRUSTEE AND SECURITYHOLDERS ON EVENT OF DEFAULT...................................    34
   6.1   Events of Default Defined...........................................................................    34
   6.2   Covenant of Company to Pay to Trustee Whole Amount Due on Securities on Default in Payment of
         Interest Or Principal...............................................................................    36
   6.3   Application of Moneys Collected by Trustee..........................................................    38
   6.4   Limitation on Suits by Holders of Securities........................................................    39
   6.5   On Default Trustee May Take Appropriate Action; Direct Action.......................................    39
   6.6   Rights of Holders of Majority in Principal Amount of Securities to Direct Trustee
         and to Waive Default................................................................................    40
   6.7   Trustee to Give Notice of Defaults Known to it, but May Withhold in Certain Circumstances...........    41
   6.8   Requirement of an Undertaking to Pay Costs in Certain Suits Under the Indenture or Against the Trustee  41

ARTICLE VII CONCERNING THE TRUSTEE...........................................................................    41
   7.1   Upon Event of Default Occurring and Continuing, Trustee Shall Exercise Powers Vested in It, and Use Same
         Degree of Care and Skill in Their Exercise, as a Prudent Man Would Use..............................    42
   7.2   Reliance on Documents, Opinions, Etc.  Except as otherwise provided in Section 7.1..................    43
   7.3   Trustee Not Liable for Recitals in Indenture or in Securities.......................................    44
   7.4   May Hold Securities.................................................................................    44
   7.5   Moneys Received by Trustee to be Held in Trust without Interest.....................................    44
   7.6   Trustee Entitled to Compensation, Reimbursement and Indemnity.......................................    44
   7.7   Right of Trustee to Rely on Officers' Certificate where No Other Evidence Specifically Prescribed...    45
   7.8   Disqualification; Conflicting Interests.............................................................    45
   7.9   Requirements for Eligibility of Trustee.............................................................    45
</TABLE>

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<TABLE>
<S>                                                                                                             <C>
   7.10     Resignation and Removal of Trustee...............................................................    46
   7.11     Acceptance by Successor Trustee..................................................................    47
   7.12     Successor to Trustee by Merger, Consolidation or Succession to Business..........................    48
   7.13     Limitations on Preferential Collection of Claims by the Trustee..................................    49

ARTICLE VIII CONCERNING THE SECURITYHOLDERS..................................................................    49
   8.1   Evidence of Action by Securityholders...............................................................    49
   8.2   Proof of Execution of Instruments and of Holding of Securities......................................    50
   8.3   Who may be Deemed Owners of Securities..............................................................    50
   8.4   Securities Owned by Company or Controlled or Controlling Persons Disregarded for Certain Purposes...    50
   8.5   Instruments Executed by Securityholders Bind Future Holders.........................................    51

ARTICLE IX SECURITYHOLDERS' MEETINGS.........................................................................    51
   9.1   Purposes for which Meetings may be Called...........................................................    51
   9.2   Manner of Calling Meetings..........................................................................    52
   9.3   Call of Meeting by Company or Securityholders.......................................................    52
   9.4   Who May Attend and Vote at Meetings.................................................................    52
   9.5   Regulations may be made by Trustee..................................................................    52
   9.6   Manner of Voting at Meetings and Record to Be Kept..................................................    53
   9.7   Exercise of Rights of Trustee, Securityholders and Holders of Preferred Securities Not to be
         Hindered or Delayed.................................................................................    54

ARTICLE X SUPPLEMENTAL INDENTURES............................................................................    54
   10.1  Purposes for which Supplemental Indentures may be Entered into Without Consent of Securityholders...    54
   10.2  Modification of Indenture with Consent of Holders of a Majority In Principal Amount of Securities...    56
   10.3  Effect of Supplemental Indentures...................................................................    57
   10.4  Securities May Bear Notation of Changes by Supplemental Indentures..................................    57
   10.5  Revocation and Effect of Consents...................................................................    58
   10.6  Conformity with Trust Indenture Act.................................................................    58

ARTICLE XI CONSOLIDATION, MERGER, SALE OR CONVEYANCE.........................................................    58
   11.1  Company May Consolidate, Etc., Only on Certain Terms................................................    58
   11.2  Successor Person Substituted for Company............................................................    59

ARTICLE XII SATISFACTION AND DISCHARGE OF INDENTURE, UNCLAIMED MONEYS........................................    59
   12.1  Satisfaction and Discharge of Indenture.............................................................    59
   12.2  Application by Trustee of Funds Deposited for Payment of Securities.................................    60
   12.3  Repayment of Moneys Held by Paying Agent............................................................    60
</TABLE>

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<TABLE>
<S>                                                                                                             <C>
   12.4     Repayment of Moneys Held by Trustee..............................................................    60

ARTICLE XIII IMMUNITY OF INCORPORATORS, STOCKHOLDERS, OFFICERS,  DIRECTORS AND EMPLOYEES.....................    60
   13.1     Incorporators, Stockholders, Officers, Directors and Employees of Company Exempt from
            Individual Liability.............................................................................    61

ARTICLE XIV SUBORDINATION OF SECURITIES......................................................................    61
   14.1     Agreement to Subordinate.........................................................................    61
   14.2     Obligation of the Company Unconditional..........................................................    63
   14.3     Limitations on Duties to Holders of Senior Indebtedness of the Company...........................    63
   14.4     Notice to Trustee of Facts Prohibiting Payment...................................................    63
   14.5     Application by Trustee of Moneys Deposited with It...............................................    64
   14.6     Subrogation......................................................................................    64
   14.7     Subordination Rights Not Impaired by Acts or Omissions of Company or Holders of Senior
            Indebtedness of the Company......................................................................    64
   14.8     Authorization of Trustee to Effectuate Subordination of Securities...............................    65
   14.9     No Payment when Senior Indebtedness in Default...................................................    65
   14.10    Right of Trustee to Hold Senior Indebtedness of the Company......................................    65
   14.11    Article Fourteen Not to Prevent Defaults.........................................................    66

ARTICLE XV MISCELLANEOUS PROVISIONS..........................................................................    66
   15.1     Successors and Assigns of Company Bound by Indenture.............................................    66
   15.2     Acts of Board, Committee or Officer of Successor Corporation Valid...............................    66
   15.3     Required Notices or Demands may be Served by Mail................................................    66
   15.4     Separability Clause..............................................................................    66
            Demands by the Company...........................................................................    66
   15.5     Payments Due on Saturdays, Sundays, and Holidays.................................................    66
   15.6     Provisions Required by Trust Indenture Act of 1939 to Control....................................    67
   15.7     Indenture and Securities to be Construed in Accordance with the Laws of the State of New York....    67
   15.8     Provisions of the Indenture and Securities for the Sole Benefit of the Parties and the
            Securityholders..................................................................................    67
   15.9     Indenture may be Executed in Counterparts........................................................    67
   15.10    Securities in Foreign Currencies.................................................................    67
   15.11    Table of Contents, Headings, Etc.................................................................    67
</TABLE>

                                      iv
<PAGE>

     THIS INDENTURE, dated as of the ___ day of December, 2000 between
CONSOLIDATED NATURAL GAS COMPANY, a corporation duly organized and existing
under the laws of the State of Delaware (hereinafter sometimes referred to as
the "Company"), party of the first part, and BANK ONE TRUST COMPANY, NATIONAL
ASSOCIATION, a national banking association duly organized and existing under
the laws of the United States of America (hereinafter sometimes referred to as
the "Trustee"), party of the second part.

                                  WITNESSETH:

     WHEREAS, for its lawful corporate purposes, the Company has duly authorized
the issuance from time to time of its unsecured junior subordinated debentures
or other evidences of indebtedness (hereinafter referred to as the
"Securities"), without limit as to principal amount, issuable in one or more
series, the amount and terms of each such series to be determined as hereinafter
provided, including, without limitation, Securities issued to evidence loans
made to the Company of the proceeds from the issuance from time to time by one
or more business trusts (each a "CNG Trust," and collectively, the "CNG Trusts")
of preferred interests in such Trusts, having the rights provided for in such
Trusts (the "Preferred Securities" which may also be referred to, without
limitation, as the "Capital Securities") and common interests in such Trusts,
having the rights provided for in such Trusts (the "Common Securities," and
collectively with the Preferred Securities, the "Trust Securities"); to be
authenticated by the Trustee; and, to provide the terms and conditions upon
which the Securities are to be authenticated, issued and delivered, the Company
has duly authorized the execution of this Indenture; and

     WHEREAS, all acts and things necessary to make the Securities when executed
by the Company and authenticated and delivered by the Trustee as in this
Indenture provided, the valid, binding and legal obligations of the Company, and
to constitute these presents a valid indenture and agreement according to its
terms, have been done and performed and the execution of this Indenture and the
issue hereunder of the Securities have in all respects been duly authorized, and
the Company, in the exercise of the legal rights and power vested in it,
executes this Indenture and proposes to make, execute, issue and deliver the
Securities;

     NOW, THEREFORE, in order to declare the terms and conditions upon which the
Securities are authenticated, issued and delivered, and in consideration of the
premises and of the purchase and acceptance of the Securities by the holders
thereof, the Company covenants and agrees with the Trustee, for the equal and
proportionate benefit of the respective holders from time to time of the
Securities or of series thereof, as follows:

                                   ARTICLE I
                                  DEFINITIONS

     1.1  Certain Terms Defined.  For all purposes of this Indenture, except
as otherwise expressly provided or unless the context otherwise requires:

          (a)  The terms defined in this Article have the meanings assigned to
them in this Article, and include the plural as well as the singular;
<PAGE>

          (b)  All other terms used herein which are defined in the Trust
Indenture Act of 1939, whether directly or by reference therein, have the
meanings assigned to them therein (except as otherwise expressly provided);

          (c)  All accounting terms used herein and not expressly defined herein
shall have the meanings assigned to them in accordance with generally accepted
accounting principles in the United States of America, and, except as otherwise
herein expressly provided, the term "generally accepted accounting principles"
with respect to any computation required or permitted hereunder shall mean such
accounting principles as are generally accepted in the United States of America
at the date of such computation; provided, that when two or more principles are
so generally accepted, it shall mean that set of principles consistent with
those in use by the Company; and

          (d)  The terms "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.

Additional Interest:

     The term "Additional Interest" means the interest, if any, that shall
accrue on any interest on the Securities of any series the payment of which has
not been made on the applicable interest payment date and which shall accrue at
the rate per annum specified or determined as specified in such Security.

Additional Tax Sums:

     The term "Additional Tax Sums" has the meaning specified in Section 4.7.

Administrative Trustee:

     The term "Administrative Trustee" means, in respect of any CNG Trust, each
Person identified as an "Administrative Trustee" in the related Trust Agreement,
solely in such Person's capacity as Administrative Trustee of such CNG Trust
under such Trust Agreement and not in such Person's individual capacity, or any
successor administrative trustee appointed as therein provided.

Authenticating Agent:

     The term "Authenticating Agent" means any Authenticating Agent appointed by
the Trustee pursuant to Section 2.9.

Authorized Newspaper:

     The term "Authorized Newspaper" means a newspaper in an official language
of the place of publication or in the English language, customarily published at
least once a day for at

                                       2
<PAGE>

least five days in each calendar week, except days that are legal holidays in
the relevant place of publication and of general circulation in each place in
connection with which the term is used or in the financial community of each
such place. Whenever successive publications are required to be made in an
Authorized Newspaper, the successive publications may be made in the same or in
a different newspaper meeting the foregoing requirements and in each case on any
day of the week. If it is impossible or, in the opinion of the Trustee,
impracticable to publish any notice in the manner herein provided, then such
publication in lieu thereof as shall be made with the approval of the Trustee
shall constitute a sufficient publication of such notice.

Board of Directors:

     The term "Board of Directors," when used with reference to the Company,
means the Board of Directors of the Company or any other committee of or created
by the Board of Directors of the Company duly authorized to act hereunder.

Business Day:

     The term "Business Day" means any day which is not a Saturday or Sunday or
a day on which banking institutions in the place of payment or other location
are authorized or required by law or executive order to close or a day on which
the principal corporate trust office of the Trustee or the Property Trustee is
closed for business.

Capital Securities:

     The term "Capital Securities" has the meaning specified in the recitals to
this Indenture.

Capital Stock:

     The term "Capital Stock" means shares of capital stock of any class of any
corporation whether now or hereafter authorized regardless of whether such
capital stock shall be limited to a fixed sum or percentage in respect of the
rights of the holders thereof to participate in dividends and in the
distribution of assets upon any voluntary or involuntary liquidation,
dissolution or winding up.

Commission:

     The term "Commission" means the Securities and Exchange Commission, as from
time to time constituted, created under the Exchange Act, or, if at any time
after the execution of this instrument such Commission is not existing and
performing the duties now assigned to it under the Trust Indenture Act of 1939,
then the body performing such duties on such date.

Common Securities:

     The term "Common Securities" has the meaning specified in the recitals to
this Indenture.

                                       3
<PAGE>

Common Stock:

     The term "Common Stock" means the common stock, no par value, of the
Company.

Company:

     The term "Company" means Consolidated Natural Gas Company, a corporation
duly organized and existing under the laws of the State of Delaware and, subject
to the provisions of Article Eleven, shall also include its successors and
assigns.

Depositary:

     The term "Depositary" means, with respect to the Securities of any series
issuable or issued in whole or in part in the form of one or more global
Securities, the person designated as Depositary by the Company pursuant to
Section 2.1 until a successor Depositary shall have become such pursuant to the
applicable provisions of this Indenture, and thereafter the term "Depositary"
shall mean or include each person who is then a Depositary hereunder and if at
any time there is more than one such person, the term "Depositary" as used with
respect to the Securities of any series shall mean the Depositary with respect
to the Securities of such series.

Distributions:

     The term "Distributions," with respect to the Trust Securities issued by a
CNG Trust, means amounts payable in respect of such Trust Securities as provided
in the related Trust Agreement and referred to therein as "Distributions."

CNG Guarantee:

     The term "CNG Guarantee" means the guarantee by the Company of
distributions on the Preferred Securities of a CNG Trust to the extent provided
in the Guarantee Agreement (as defined in the related Trust Agreement).

CNG Trust:

     The terms "CNG Trust" and "CNG Trusts" each have the meaning specified in
the recitals to this Indenture.

Event of Default:

     The term "Event of Default" with respect to Securities of any series shall
mean any event specified as such in Section 6.1 and any other event as may be
established with respect to the Securities of such series as contemplated by
Section 2.1.

Exchange Act:

                                       4
<PAGE>

     The term "Exchange Act" has the meaning specified in Section 2.2.

Extension Period:

     The term "Extension Period" has the meaning specified in Section 2.10.

Indenture:

     The term "Indenture" means this instrument as originally executed, or, if
amended or supplemented as herein provided, then as so amended or supplemented,
and shall include the form and terms of particular series of Securities
established as contemplated by Sections 2.1 and 2.2.

Investment Company Event:

     The term "Investment Company Event" means in respect of a CNG Trust, the
receipt by the Company and a CNG Trust of an Investment Company Event Opinion
(as defined in the relevant Trust Agreement) to the effect that, as a result of
the occurrence of a change in law or regulation or a change in interpretation or
application of law or regulation by any legislative body, court, governmental
agency or regulatory authority (a "Change in 1940 Act Law"), such CNG Trust is
or will be considered an investment company that is required to be registered
under the 1940 Act, which Change in 1940 Act Law becomes effective on or after
the date of original issuance of the Preferred Securities of such CNG Trust.

Maturity:

     The term "Maturity" when used with respect to any Security means the date
on which the principal of such Security becomes due and payable as therein or
herein provided, whether at the Stated Maturity or by declaration of
acceleration, call for redemption or otherwise.

1940 Act:

     The term "1940 Act" means the Investment Company Act of 1940, as amended.

Officers' Certificate:

     The term "Officers' Certificate" shall mean a certificate signed by any two
of the Chairman of the Board, the President, any Vice President, the Treasurer,
the Controller or the Corporate Secretary of the Company or by any of the
Chairman of the Board, the President, any Vice President, the Treasurer, the
Controller or the Corporate Secretary of the Company and either an Assistant
Treasurer or an Assistant Corporate Secretary and delivered to the Trustee. Each
such certificate shall include the statements provided for in Section 15.4, if
and to the extent required by the provisions thereof and will comply with
Section 314 of the Trust Indenture Act of 1939.

                                       5
<PAGE>

Opinion of Counsel:

     The term "Opinion of Counsel" shall mean a written opinion of counsel, who
may be an employee of or counsel for the Company or other counsel who shall be
reasonably satisfactory to the Trustee, and who may be an employee of, or
counsel to, the Company and delivered to the Trustee.  Each such opinion that,
if required by the Trust Indenture Act, complies with the requirements of
Section 314 of the Trust Indenture Act.

Original Issue Date:

     The term "Original Issue Date" means the first date of issuance of each
Security.

Original Issue Discount Security:

     The term "Original Issue Discount Security" shall mean any Security which
provides for an amount less than the principal amount thereof to be due and
payable upon declaration pursuant to Section 6.1.

Paying Agent:

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

Person:

     The term "Person" or "person" means any individual, corporation, estate,
partnership, joint venture, association, joint stock company, limited liability
company, trust, unincorporated association or government or any agency or
political subdivision thereof, or any other entity of whatever nature.

Preferred Securities:

     The term "Preferred Securities" has the meaning specified in the recitals
to this Indenture.

Principal:

     The term "principal," whenever used with reference to the Securities or any
Security or any portion thereof, shall be deemed to include "and premium, if
any."

Property Trustee:

     The term "Property Trustee" means, in respect of any CNG Trust, the
commercial bank or trust company identified as the "Property Trustee" in the
related Trust Agreement, solely in its capacity as Property Trustee of such CNG
Trust under such Trust Agreement and not in its

                                       6
<PAGE>

individual capacity, or its successor in interest in such capacity, or any
successor property trustee appointed as therein provided.

Ranking Junior to the Securities:

     The term "ranking junior to the Securities" when used with respect to any
obligation of the Company means any other obligation of the Company which (a)
ranks junior to and not equally with or prior to the Securities (or any other
obligations of the Company ranking on a parity with the Securities) in right of
payment upon the happening of any event of the kind specified in the first
sentence of the second paragraph of Section 14.1, or (b) is specifically
designated as ranking junior to the Securities by express provision in the
instrument creating or evidencing such obligation.

     The securing of any obligations of the Company, otherwise ranking junior to
the Securities, shall be deemed to prevent such obligations from constituting
obligations ranking junior to the Securities.

Ranking on a parity with the Securities:

     The term "ranking on a parity with the Securities" when used with respect
to any obligation of the Company means any obligation of the Company which (a)
ranks equally with and not prior to the Securities in right of payment upon the
happening of any event of the kind specified in the first sentence of the second
paragraph of Section 14.1, (b) any CNG Guarantee of Preferred Securities of any
CNG Trust or other entity affiliated with the Company that is a financing entity
of the Company, or (c) is specifically designated as ranking on a parity with
the Securities by express provision in the instrument creating or evidencing
such obligation.

     The securing of any obligations of the Company, otherwise ranking on a
parity with the Securities, shall not be deemed to prevent such obligations from
constituting obligations ranking on a parity with the Securities.

Record date:

     The term "record date" has the meaning specified in Section 2.3.

Redemption; redeem; redeemable; etc.:

     The terms "redemption," "redeem" and "redeemable" when used with respect to
any Security, shall include, without limitation, any prepayment or repayment
provisions applicable to such Security.

Register:

     The term "Register" has the meaning specified in Section 2.5.

                                       7
<PAGE>

Resolution of the Company:

     The term "Resolution of the Company" means a resolution of the Company, in
the form of a resolution of the Board of Directors, in the form of a resolution
of a duly constituted committee of the Board of Directors,  or in the form of a
resolution of two or more senior officers of the Company, authorizing,
ratifying, setting forth or otherwise validating agreements, execution and
delivery of documents, the issuance, form and terms of Securities, or any other
actions or proceedings pursuant or with respect to this Indenture.

Responsible Officer:

     The term "Responsible Officer," when used with respect to the Trustee,
means the chairman and vice chairman of the board of directors, the president,
the chairman and vice chairman of the executive committee of the board of
directors, every vice president or officer senior thereto, every assistant vice
president, the secretary, every assistant secretary, the treasurer, every
assistant treasurer, every corporate trust officer, every assistant corporate
trust officer, and every other officer and assistant officer of the Trustee
customarily performing functions similar to those performed by the persons who
at the time shall be such officers, respectively, or to whom any corporate trust
matter is referred because of his knowledge of, and familiarity with, a
particular subject.

Rights Plan:

     The term "Rights Plan" means a plan of the Company providing for the
issuance by the Company to all holders of its Common Stock of rights entitling
the holders thereof to subscribe for or purchase shares of Common Stock or any
class or series of preferred stock, which rights (i) are deemed to be
transferred with such shares of Common Stock, (ii) are not exercisable and (iii)
are also issued in respect of future issuances of Common Stock, in each case
until the occurrence of a specified event or events.

Security or Securities; outstanding:

     The term "Security" or "Securities" means any security or securities of the
Company, as the case may be, without regard to series, authenticated and
delivered under this Indenture.

     The term "outstanding," when used with reference to Securities and subject
to the provisions of Section 8.4, means as of any particular time, all
Securities authenticated and delivered by the Trustee under this Indenture,
except

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

          (b)  Securities, or portions thereof, for the payment or redemption of
which moneys in the necessary amount shall have been deposited in trust with the
Trustee or with any Paying Agent (other than the Company) or shall have been set
aside and segregated in trust by

                                       8
<PAGE>

the Company (if the Company shall act as its own Paying Agent), provided that
such Securities shall have reached their Stated Maturity or, if such Securities
are to be redeemed prior to the Stated Maturity thereof, notice of such
redemption shall have been given as in Article Three provided, or provision
satisfactory to the Trustee shall have been made for giving such notice; and

          (c)  Securities in lieu of or in substitution for which other
Securities shall have been authenticated and delivered or which have been paid
pursuant to the terms of Section 2.7 unless proof satisfactory to the Trustee is
presented that any such Securities are held by a bona fide purchaser in whose
hands any of such Securities is a valid, binding and legal obligation of the
Company.

     In determining whether the holders of the requisite principal amount of
outstanding Securities have given any request, demand, authorization, direction,
notice, consent or waiver hereunder, the principal amount of an Original Issue
Discount Security that shall be deemed to be outstanding for such purposes shall
be the amount of the principal thereof that would be due and payable as of the
date of such determination upon a declaration of acceleration of the Maturity
thereof pursuant to Section 6.1.

Securityholder; registered holder:

     The terms "Securityholder," "holder of Securities," "registered holder" or
other similar term, mean any person who shall at the time be the registered
holder of any Security or Securities on the Register kept for that purpose in
accordance with the provisions of this Indenture.

Senior Indebtedness of the Company:

     The term "Senior Indebtedness of the Company" means (i) any indebtedness of
the Company for borrowed or purchased money, whether or not evidenced by bonds,
debentures, notes or other written instruments, (ii) obligations of the Company
for reimbursement under letters of credit, banker's acceptances, security
purchase facilities or similar facilities issued for the account of the Company,
(iii) any indebtedness or other obligations of the Company with respect to
commodity contracts (including but not limited to contracts in the spot, forward
and futures markets, options, and contracts for differences), interest rate
commodity and currency swap agreements, cap, floor and collar agreements,
currency spot and forward contracts, and other similar agreements or
arrangements designed to protect against fluctuations in commodity prices,
currency exchange or interest rates, (iv) all obligations of the Company as
lessee which are capitalized in accordance with generally accepted accounting
principles, and (v) any guarantees, endorsements (other than by endorsement of
negotiable instruments for collection in the ordinary course of business) or
other similar contingent obligations in respect of obligations of others of a
type described in (i), (ii) or (iii) above, whether or not such obligation is
classified as a liability on a balance sheet prepared in accordance with
generally accepted accounting principles, in each case listed in (i), (ii),
(iii), (iv) and (v) above whether outstanding on the date of execution of this
Indenture or thereafter incurred, other than obligations ranking on a parity

                                       9
<PAGE>

with the Securities or ranking junior to the Securities; provided, however, that
"Senior Indebtedness of the Company" does not include (a) obligations to trade
creditors or (b) any indebtedness of the Company to any of its Subsidiaries.

Special Interest:

     The term "Special Interest" shall have the meaning ascribed to it in the
Debenture Exchange and Registration Rights Agreement.

Stated Maturity:

     The term "Stated Maturity" when used with respect to any Security or any
installment of principal thereof or interest thereon means the date specified
pursuant to the terms of such Security as the date on which the principal of
such Security or such installment of interest is due and payable in the case of
such principal, as such date may be shortened or extended as provided pursuant
to the terms of such Security and this Indenture.

Subsidiary:

     The term "Subsidiary" means any corporation(or the equivalent type of
entity in other jurisdictions) more than 50% of the outstanding voting stock of
which is owned, directly or indirectly, by the Company or by one or more other
Subsidiaries, or by the Company and one or more other Subsidiaries.  For the
purposes of this definition, "voting stock" means stock which ordinarily has
voting power for the election of directors, whether at all times or only so long
as no senior class of stock has such voting power by reason of any contingency.

Tax Event:

     The term "Tax Event" means the receipt by the Company and a CNG Trust of a
Tax Event Opinion (as defined in the relevant Trust Agreement) to the effect
that, as a result of any amendment to, or change (including any announced
prospective change) in, the laws (or any regulations thereunder) of the United
States or any political subdivision or taxing authority thereof or therein, or
as a result of any official administrative written decision or pronouncement or
judicial decision interpreting or applying such laws or regulations, which
amendment or change is effective or which pronouncement or decision is announced
on or after the date of issuance of the Preferred Securities of such CNG Trust,
there is more than an insubstantial risk that (i) the CNG Trust is, or will be
within 90 days after the date of such Tax Event Opinion, subject to United
States federal income tax with respect to income received or accrued on the
corresponding series of Securities issued by the Company to such CNG Trust, (ii)
interest payable by the Company on such corresponding series of Securities is
not, or within 90 days of the date of such Tax Event Opinion, will not be,
deductible by the Company, in whole or in part, for United States federal income
tax purposes, or (iii) the CNG Trust is, or will be within 90 days after the
date of such Tax Event Opinion, subject to more than a de minimis amount of
other taxes, duties or other governmental charges.

                                       10
<PAGE>

Trust Agreement:

     The term "Trust Agreement" means the Trust Agreement governing any CNG
Trust, whether now existing or created in the future, which purchased the
Securities of any series in each case.

Trustee; Principal Office of the Trustee:

     The term "Trustee" means the Person named as the "Trustee" in the first
paragraph of this instrument, and, subject to the provisions of Article Seven,
shall also include its successors.  The term "principal office" of the Trustee
shall mean the principal corporate trust office of the Trustee in the City of
New York, state of Illinois, at which the corporate trust business of the
Trustee shall, at any particular time, be principally administered.  The present
address of the office at which the corporate trust business of the Trustee is
administered is 153 West 51st Street, New York, New York 10019 (Attention:
Global Trust Administration).

Trust Indenture Act of 1939:

     Except as herein otherwise expressly provided or unless the context
requires otherwise, the term "Trust Indenture Act of 1939" shall mean the Trust
Indenture Act of 1939, as amended by the Trust Indenture Reform Act of 1990, as
in force at the date as of which this Indenture was originally executed;
provided, however, that, in the event that the Trust Indenture Act is amended
after such date, then "Trust Indenture Act of 1939" means, to the extent
required by any such amendment, the Trust Indenture Act of 1939 as so amended.

Trust Securities:

     The term "Trust Securities" has the meaning specified in the recitals to
this Indenture.

Vice President:

     The term "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."

                                  ARTICLE II
            ISSUE, DESCRIPTION, EXECUTION, REGISTRATION OF TRANSFER
                          AND EXCHANGE OF SECURITIES

     2.1  Amount, Series and Delivery of Securities.  The aggregate principal
amount of Securities which may be authenticated and delivered under this
Indenture is unlimited.

     The Securities may be issued in one or more series.  The terms of each
series (which terms shall not be inconsistent with the provisions of this
Indenture), shall either be established in or pursuant to a Resolution of the
Company and set forth in an Officers' Certificate, or set

                                       11
<PAGE>

forth in one or more indentures supplemental hereto, prior to the issuance of
Securities of any series and shall specify:

          (a)  The title of the Securities of such series (which shall
distinguish the Securities of the series from all other Securities and which
shall include the word "subordinated" or a word of like meaning);

          (b)  Any limit upon the aggregate principal amount of the Securities
of such series which may be executed, authenticated and delivered under this
Indenture; provided, however, that nothing contained in this Section or
elsewhere in this Indenture or in such Securities or in a Resolution of the
Company or Officers' Certificate or supplemental indenture is intended to or
shall limit execution by the Company or authentication and delivery by the
Trustee of Securities under the circumstances contemplated by Sections 2.5, 2.6,
2.7, 3.2, 3.3, 10.4 or upon surrender in part of any Securities for conversion
or exchange into Capital Stock of the Company or other securities pursuant to
its terms or pursuant to the terms of such Securities;

          (c)  The date or dates (if any) on which the principal of the
Securities of such series is payable;

          (d)  The rate or rates at which the Securities of such series shall
bear interest, if any, the rate or rates and extent to which Additional Interest
or other interest, if any, shall be payable, the date or dates from which such
interest shall accrue, the dates on which such interest shall be payable, the
record date for the interest payable on any interest payment date and the right
of the Company to defer or extend an interest payment date, whether and under
what circumstances Additional Tax Sums on such Securities shall be payable, the
notice, if any to holders of such Securities regarding the determination of
interest on a floating-rate Security and the manner of giving such notice and
the basis upon which interest shall be calculated if other than that of a 360-
day year of twelve 30-day months;

          (e)  The place or places where Securities of such series may be
presented for payment and for the other purposes provided in Section 4.2;

          (f)  Any price or prices at which, any date or dates on which, any
period or periods within which, and any terms and conditions upon which
Securities of such series may be redeemed or prepaid, in whole or in part, at
the option of the Company;

          (g)  The type or types (if any) of Capital Stock of the Company into
which, any period or periods within which, and any terms and conditions upon
which Securities of such series may be made payable, converted, exchanged in
whole or in part, at the option of the holder or of the Company;

          (h)  If other than denominations of $1,000 and any whole multiple
thereof, the denominations in which Securities of such series shall be issuable;

                                       12
<PAGE>

          (i)  If other than the principal amount thereof, the portion of the
principal amount of Securities of such series which shall be payable upon
declaration of acceleration of the Maturity thereof pursuant to Section 6.1;

          (j)  If other than such coin or currency of the United States of
America as at the time of payment is legal tender for payment of public or
private debts, the coin or currency (which may be a composite currency) in which
payment of the principal of and interest, if any, on the Securities of such
series shall be payable;

          (k)  If the principal of or interest, if any, on the Securities of
such series are to be payable, at the election of the Company or a holder
thereof, in a coin or currency (including composite currency) other than that in
which the Securities of such series are stated to be payable, the date or dates
on which, the period or periods within which, the time and manner of determining
the exchange rate between the currency in which such Securities are to be paid
pursuant to such election and the terms and conditions upon which, such election
may be made;

          (l)  If the amounts of payments of principal of or interest, if any,
on the Securities of such series may be determined with reference to an index
based on a coin or currency (including composite currency) other than that in
which the Securities of such series are stated to be payable, the manner in
which such amounts shall be determined;

          (m)  If the Securities of such series are payable at Maturity or upon
earlier redemption in Capital Stock, the terms and conditions upon which such
payment shall be made;

          (n)  The person or persons who shall be registrar for the Securities
of such series, and the place or places where the Register of Securities of the
series shall be kept;

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

          (p)  Whether any Securities of such series are to be issuable in
global form with or without coupons, and, if so, the Depositary for such global
Securities, whether such Securities are to be issued in temporary or permanent
global form or both and whether beneficial owners of interests in any such
global Security may exchange such interests for definitive Securities of such
series and of like tenor of any authorized form and denomination and the
circumstances under which, and the place or places where, any such exchanges may
occur, if other than in the manner provided in Section 2.5;

          (q)  The form of the related Trust Agreement and CNG Guarantee, if
applicable;

                                       13
<PAGE>

          (r)  Whether any Securities of such series are subject to any
securities law or other restrictions on transfer; and any other terms of the
series (which terms shall not be inconsistent with the provisions of this
Indenture);

          (s)  Any right of the Company to (i) shorten or extend the Maturity,
or (ii) defer payments of interest;

or in any case, the method for determining such terms, the persons authorized to
determine such terms and the limits, if any, within which any such determination
of such terms is to be made.

     The Securities of all series shall be subordinate to Senior Indebtedness of
the Company as provided in Article Fourteen.  The applicable Resolution of the
Company, Officers' Certificate or supplemental indenture may provide that
Securities of any particular series may be issued at various times, with
different dates on which the principal or any installment of principal is
payable, with different rates of interest, if any, or different methods by which
interest may be determined, with different dates from which such interest shall
accrue, with different dates on which such interest may be payable or with any
different terms other than Events of Default but all such Securities of a
particular series shall for all purposes under this Indenture including, but not
limited to, voting and Events of Default, be treated as Securities of a single
series.

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

     At any time and from time to time after the execution and delivery of this
Indenture, the Company may deliver Securities of any series executed by the
Company to the Trustee for authentication by it, and the Trustee shall thereupon
authenticate and deliver such Securities to or upon the written order of the
Company, signed by any two of the Chairman of the Board, the President, any Vice
President, the Treasurer, the Controller or the Corporate Secretary of the
Company or by any of the Chairman of the Board, President, any Vice President,
the Treasurer, the Controller or the Corporate Secretary of the Company and
either an Assistant Treasurer or an Assistant Corporate Secretary, without any
further corporate action by the Company.  All Securities of any one series need
not be issued at the same time and, unless otherwise so provided by the Company,
a series may be reopened for issuances of additional Securities of such series
or to establish additional terms of such series of Securities.  If the form or
terms of the Securities of the series have been established in or pursuant to a
Resolution of the Company and set forth in an Officers' Certificate, or set
forth in one or more  supplemental indentures hereto, as permitted by this
Section and Section 2.2, 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 7.1) shall be
fully protected in relying upon:

                                       14
<PAGE>

          (x)    an Opinion of Counsel to the effect that:

           (i)   the form or forms and terms, or if all Securities of such
     series are not to be issued at one time, the manner of determining the
     terms of such Securities, have been established in conformity with the
     provisions of this Indenture;

           (ii)  all conditions precedent provided for in this Indenture to the
     authentication and delivery of such Securities have been complied with and
     that such Securities when completed by appropriate insertions, executed
     under the Company's corporate seal and attested by duly authorized officers
     of the Company, delivered by duly authorized officers of the Company to the
     Trustee for authentication pursuant to this Indenture, and 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 binding obligations of the Company, enforceable
     against the Company in accordance with their terms, except as enforcement
     thereof may be subject to or limited by bankruptcy, insolvency,
     reorganization, moratorium, arrangement, fraudulent conveyance, fraudulent
     transfer or other similar laws relating to or affecting creditors' rights
     generally, and subject to general principles of equity (regardless of
     whether enforcement is sought in a proceeding in equity or at law); and

          (iii)  if the Securities of such series have been registered under the
     Securities Act, that this Indenture has been qualified under the Trust
     Indenture Act;

and

          (y)    an Officers' Certificate stating that, to the best knowledge of
the Persons executing such certificate, no event which is, or after notice or
lapse of time would become, an Event of Default with respect to any of the
Securities shall have occurred and be continuing.

     The Trustee shall not be required to authenticate such Securities if the
issue of such Securities pursuant to this Indenture will affect the Trustee's
own rights, duties or immunities under the Securities and this Indenture or
otherwise in a manner which is not reasonably acceptable to the Trustee or if
the Trustee being advised by counsel, determines that such action may not
lawfully be taken.

     If all the Securities of any series are not to be issued at one time, it
shall not be necessary to deliver either an Opinion of Counsel or an Officers'
Certificate at the time of issuance of each Security, provided that such Opinion
of Counsel and Officers' Certificate, with appropriate modifications, are
instead delivered at or prior to the time of issuance of the first Security of
such series.

                                       15
<PAGE>

     Each Security shall be dated the date of its authentication.

     2.2  Form of Securities and Trustee's Certificate.  The Securities of each
series shall be substantially of the tenor and terms as shall be authorized in
or pursuant to a Resolution of the Company and set forth in an Officers'
Certificate, or set forth in an indenture or 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 or designation and such
legends or endorsements thereon as the Company may deem appropriate and as are
not inconsistent with the provisions of this Indenture, or as may be required to
comply with any law or with any rule or regulation made pursuant thereto or with
any rule or regulation of any stock exchange or automated quotation system on
which the Securities may be listed, or to conform to usage. If the form of
Securities of any series is authorized by action taken pursuant to a Resolution
of the Company, a copy of an appropriate record of such action shall be
certified by the Corporate Secretary or an Assistant Corporate Secretary of the
Company and delivered to the Trustee at or prior to the delivery of the
Officers' Certificate contemplated by Section 2.1 setting forth the terms of the
series.

     The Securities may be printed, lithographed or fully or partly engraved.

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

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

          [Date]                     BANK ONE TRUST COMPANY, NATIONAL
                                     ASSOCIATION, as Trustee


                                     By: ______________________________
                                            Authorized Officer"

     If Securities of a series are issuable in temporary or permanent global
form, as specified pursuant to Section 2.1, then, notwithstanding clause (h) of
Section 2.1 and the provisions of Section 2.3, such Security shall represent
such amount 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 of such series from time to time endorsed thereon and
that the aggregate amount of outstanding Securities of such series represented
thereby may from time to time be increased or reduced to reflect exchanges or
transfers (in any event, not to exceed the aggregate principal amount authorized
from time to time pursuant to Section 2.1).  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 in such
manner and upon instructions given by such person or persons as shall be
specified in such Security or by the Company.  Subject to the provisions of
Section 2.4 and, if applicable, Section

                                       16
<PAGE>

2.6, the Trustee shall deliver and redeliver any Security in global form in the
manner and upon written instructions given by the person or persons specified in
such Security or by the Company. Any instructions by the Company with respect to
endorsement or delivery or redelivery of a Security in global form after the
original issuance of the Securities of such series shall be in writing, and
shall not be objected to in writing by the Depositary, but need not comply with
Section 15.4 and need not be accompanied by an Opinion of Counsel.

     Unless otherwise specified pursuant to Section 2.1, payment of principal of
and any premium and any interest on any Security in global form shall be made to
the person or persons specified therein.

     The owners of beneficial interests in any global Security shall have no
rights under this Indenture with respect to any global Security held on their
behalf by a Depositary, and such Depositary may be treated by the Company, the
Trustee, and any agent of the Company or the Trustee as the sole holder and
owner of such global Security for all purposes whatsoever.  Notwithstanding the
foregoing, 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 its participants in any global Security, the operation of
customary practices governing the exercise of the rights of a holder of a
Security of any series, including, without limitation, the granting of proxies
or other authorization of participants to give or take any request, demand,
authorization, direction, notice, consent, waiver or other action that a holder
is entitled to give or take under this Indenture.

     Neither the Company, the Trustee nor any Authenticating Agent will have any
responsibility or liability for any aspect of the records relating to or
payments made on account of beneficial ownership interests of a global Security
or for maintaining, supervising or reviewing any records relating to such
beneficial ownership interests.

     Each Depositary designated pursuant to Section 2.1 for a global Security
must, to the extent required by applicable law or regulation, be a clearing
agency registered under the Securities Exchange Act of 1934, as amended (the
"Exchange Act"), and any other applicable statute or regulation.

     2.3  Denominations of and Payment of Interest on Securities.  The
Securities of each series shall be issuable as fully registered Securities
without coupons in such denominations as shall be specified as contemplated by
Section 2.1 (except as provided in Section 2.2 and Section 2.6).  In the absence
of any such provisions with respect to the Securities of any series, the
Securities of such series shall be issuable in denominations of $1,000 and
integral multiples of $1,000 in excess thereof.

     If the Securities of any series shall bear interest, each Security of such
series shall bear interest from the applicable date at the rate or rates per
annum, and such interest shall be payable on the dates, specified on, or
determined in the manner provided in, the Security.  The person in

                                       17
<PAGE>

whose name any Security is registered at the close of business on any record
date (as defined below) for the Security with respect to any interest payment
date for such Security shall be entitled to receive the interest payable thereon
on such interest payment date notwithstanding the cancellation of such Security
upon any registration of transfer, exchange or conversion thereof subsequent to
such record date and prior to such interest payment date, unless such Security
shall have been called for redemption on a date fixed for redemption subsequent
to such record date and prior to such interest payment date or unless the
Company shall default in the payment of interest due on such interest payment
date on such Security, in which case such defaulted interest shall be paid to
the person in whose name such Security (or any Security or Securities issued
upon registration of transfer or exchange thereof) is registered at the close of
business on the record date for the payment of such defaulted interest, or
except as otherwise specified as contemplated by Section 2.1. The term "record
date" as used in this Section with respect to any regular interest payment date
for any Security shall mean such day or days as shall be specified as
contemplated by Section 2.1; provided, however, that in the absence of any such
provisions with respect to any Security, such term shall mean: (1) if such
interest payment date is the first day of a calendar month, the fifteenth day of
the calendar month next preceding such interest payment date; or (2) if such
interest payment date is the fifteenth day of a calendar month, the first day of
such calendar month; provided, further, that (except as otherwise specified as
contemplated by Section 2.1) if the day which would be the record date as
provided herein is not a Business Day, then it shall mean the Business Day next
preceding such day. Such term, as used in this Section, with respect to the
payment of any defaulted interest on any Security shall mean (except as
otherwise specified as contemplated by Section 2.1) the fifth day next preceding
the date fixed by the Company for the payment of defaulted interest, established
by notice given by first class mail by or on behalf of the Company to the holder
of such Security not less than 10 days preceding such record date, or, if such
fifth day is not a Business Day, the Business Day next preceding such fifth day.

     2.4  Execution of Securities.  The Securities shall be signed on behalf of
the Company, manually or in facsimile, by its Chairman of the Board, President,
any Vice President, Treasurer or under its corporate seal, which may be affixed
thereto or printed, engraved or otherwise reproduced thereon, by facsimile or
otherwise and attested by its Corporate Secretary or one of its Assistant
Corporate Secretaries of the Corporate Secretaries of the Company. Only such
Securities as shall bear thereon a certificate of authentication substantially
in the form recited herein, executed by or on behalf of the Trustee manually by
an authorized officer, shall be entitled to the benefits of this Indenture or be
valid or obligatory for any purpose. Such certificate of authentication by the
Trustee upon any Security executed by the Company shall be conclusive evidence
that the Security so authenticated has been duly authenticated and delivered
hereunder and that the holder is entitled to the benefits of this Indenture.
Typographical or other errors or defects in the seal or facsimile signature on
any Security or in the text thereof shall not affect the validity or
enforceability of such Security if it has been duly authenticated and delivered
by the Trustee.

     In case any officer of the Company who shall have signed any of the
Securities, manually or in facsimile, shall cease to be such officer before the
Securities so signed shall have been

                                       18
<PAGE>

authenticated and delivered by the Trustee, or disposed of by the Company, such
Securities nevertheless may be authenticated and delivered or disposed of as
though the person who signed such Securities had not ceased to be such officer
of the Company; and any Security may be signed on behalf of the Company,
manually or in facsimile, by such persons as, at the actual date of the
execution of such Security, shall be the proper officers of the Company,
although at the date of the execution of this Indenture any such person was not
such officer.

     2.5  Registration, Transfer and Exchange of Securities.  Securities of any
series (other than a global Security, except as set forth below) may be
exchanged for a like aggregate principal amount of Securities of the same series
of the same tenor and terms of other authorized denominations. Securities to be
exchanged shall be surrendered at the offices or agencies to be maintained by
the Company in accordance with the provisions of Section 4.2 and the Company
shall execute and the Trustee shall authenticate and deliver, or cause to be
authenticated and delivered, in exchange therefor the Security or Securities
which the Securityholder making the exchange shall be entitled to receive.

     The Company shall keep, at one of the offices or agencies to be maintained
by the Company in accordance with the provisions of Section 4.2 with respect to
the Securities of each series, a Register (the "Register") in which, subject to
such reasonable regulations as it may prescribe, the Company shall register the
Securities of such series and the transfer of Securities of such series as in
this Article provided. Such Register shall be in written form or in any other
form capable of being converted into written form within a reasonable time.  At
all reasonable times the Register shall be open for inspection by the Trustee
and any registrar of the Securities of such series other than the Trustee. Upon
due presentment for registration of transfer of any Security of any series at
the offices or agencies of the Company to be maintained by the Company in
accordance with Section 4.2 with respect to the Securities of such series, the
Company shall execute and register and the Trustee shall authenticate and
deliver in the name of the transferee or transferees a new Security or
Securities of the same series of like tenor and terms for a like aggregate
principal amount of authorized denominations.

     Every Security issued upon registration of transfer or exchange of
Securities pursuant to this Section shall be the valid obligation of the
Company, evidencing the same debt, and entitled to the same benefits under this
Indenture, as the Security or Securities surrendered upon registration of such
transfer or exchange.

     All Securities of any series presented or surrendered for exchange,
registration of transfer, redemption, conversion or payment shall, if so
required by the Company or any registrar of the Securities of such series, be
accompanied by a written instrument or instruments of transfer, in form
satisfactory to the Company and such registrar, duly executed by the registered
holder or by his attorney duly authorized in writing.

     No service charge shall be made for any exchange or registration of
transfer of Securities, but the Company may require payment of a sum sufficient
to cover any tax or other

                                       19
<PAGE>

governmental charge and any other expense (including fees and expenses of the
Trustee) that may be imposed in relation thereto.

     The Company shall not be required to exchange or register the transfer of
(a) any Securities of any series during a period beginning at the opening of
business fifteen days before the day of selection for redemption of outstanding
Securities of such series and ending at the close of business on the relevant
redemption date, or (b) any Securities or portions thereof called or selected
for redemption, except, in the case of Securities called for redemption in part,
the portion thereof not so called for redemption.

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

     Notwithstanding the foregoing, except as otherwise specified pursuant to
Section 2.1, any global Security shall be exchangeable pursuant to this Section
only as provided in this paragraph.  If at any time the Depositary for the
Securities of a series notifies the Company that it is unwilling or unable to
continue as Depositary for the Securities of such series, or if at any time the
Depositary for the Securities of such series shall cease to be a "clearing
agency" registered under the Exchange Act, the Company shall appoint a successor
Depositary with respect to the Securities of such series. If (a) a successor
Depositary for the Securities of such series is not appointed by the Company
within 90 days after the Company receives such notice or becomes aware of such
ineligibility (thereby automatically making the Company's election pursuant to
Section 2.1 no longer effective with respect to the Securities of such series),
(b) the beneficial owners of interests in a global Security are entitled to
exchange such interests for definitive Securities of such series and of the same
tenor and terms, as specified pursuant to Section 2.1, (c) there shall have
occurred and be continuing an Event of Default with respect to the Securities of
such series, or (d) the Company in its sole discretion determines that the
Securities of any series issued in the form of one or more global Securities
shall no longer be represented by such global Security or Securities, then
without unnecessary delay, but, if appropriate, in any event not later than the
earliest date on which such interest may be so exchanged, the Company shall
deliver to the Trustee definitive Securities in aggregate principal amount equal
to the principal amount of such global Security, executed by the Company and
authenticated by the Trustee. On or after the earliest date on which such
interests are or may be so exchanged, such global Security shall be surrendered
by the 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 upon
payment by the beneficial owners of such interest, at the option of the Company,
of a service charge for such exchange and of a proportionate share of the cost
of printing such definitive Securities, and the Trustee shall authenticate and
deliver, (a) to each person specified by the Depositary in exchange for each
portion of such global Security, an equal aggregate principal amount of
definitive Securities of the same series of authorized denominations and of the
same tenor and terms as the

                                       20
<PAGE>

portion of such global Security to be exchanged, and (b) to such Depositary a
global Security in a denomination equal to the difference, if any, between the
principal amount of the surrendered global security and the aggregate principal
amount of definitive Securities delivered to holders 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 to be
redeemed and ending on the relevant redemption date. If a Security is issued in
exchange for any portion of a global Security after the close of business at the
office or agency where such exchange occurs on (i) any record date and before
the opening of business at such office or agency on the relevant interest
payment date, or (ii) any record date for the payment of defaulted interest and
before the opening of business at such office or agency on the related proposed
date for payment of defaulted interest, then interest or default interest, as
the case may be, will not be payable on such interest payment date or proposed
date for payment of defaulted interest, as the case may be, in respect of such
Security, but will be payable on such interest payment date or proposed date for
payment of defaulted interest, as the case may be, only to the person to whom
interest in respect of such portion of such global Security is payable in
accordance with the provisions of this Indenture and such global Security.

     2.6  Temporary Securities.  Pending the preparation of definitive
Securities of any series, the Company may execute and the Trustee shall, upon
the written order of the Company, authenticate and deliver temporary Securities
of such series (printed, lithographed, mimeographed or otherwise produced) of
any denomination and substantially in the form of the definitive Securities of
such series, but with or without a recital of specific redemption prices or
conversion provisions and with such omissions, insertions and variations as may
be appropriate for temporary Securities, all as may be determined by the
Company.  Temporary Securities may contain such reference to any provisions of
this Indenture as may be appropriate.  Every such temporary Security shall be
authenticated by the Trustee upon the same conditions and in substantially the
same manner, and with the same effect, as the definitive Securities.  Without
unreasonable delay the Company will execute and deliver to the Trustee
definitive Securities of such series and thereupon any or all temporary
Securities of such series may be surrendered in exchange therefor, at the
offices or agencies to be maintained by the Company as provided in Section 4.2
with respect to the Securities of such series, and the Trustee shall, upon the
written order of the Company, authenticate and deliver in exchange for such
temporary Securities an equal aggregate principal amount of definitive
Securities of such series. Until so exchanged, the temporary Securities of any
series shall in all respects be entitled to the same benefits under this
Indenture as definitive Securities of such series authenticated and delivered
hereunder.

     2.7  Mutilated, Destroyed, Lost or Stolen Securities.  In case any
temporary or definitive Security shall become mutilated or be destroyed, lost or
stolen, the Company, in the case of any mutilated Security shall, and in the
case of any destroyed, lost or stolen Security in its discretion may, execute,
and upon its request the Trustee shall authenticate and deliver, or cause to be
authenticated and delivered, a new Security of the same series of like tenor and
terms in exchange and substitution for the mutilated Security, or in lieu of and
in substitution for the Security so destroyed, lost or stolen.  In case any such
Security shall have matured or shall be about to mature, instead of issuing a
substituted Security, the Company may pay or authorize

                                       21
<PAGE>

payment of the same (without surrender thereof, except in the case of a
mutilated Security). In every case the applicant for a substituted Security or
for such payment shall furnish to the Company and the Trustee such security or
indemnity as may be required by them to save each of them harmless, and, in
every case of destruction, loss or theft, the applicant shall also furnish to
the Company and to the Trustee evidence to their satisfaction of the
destruction, loss or theft of such Security and of the ownership thereof. The
Trustee may authenticate any such substituted Security and deliver the same, or
the Trustee or any Paying Agent of the Company may make any such payment, upon
the written request or authorization of any officer of the Company. Upon the
issue of any substituted Security, 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 reasonable expenses connected therewith
(including the fees and expenses of the Trustee).

     To the extent permitted by mandatory provisions of law, every substituted
Security issued pursuant to the provisions of this Section in substitution for
any destroyed, lost or stolen Security shall constitute an additional
contractual obligation of the Company, whether or not the destroyed, lost or
stolen Security shall be found at any time, and shall be entitled to all the
benefits of this Indenture equally and proportionately with any and all other
Securities of the same series duly issued hereunder.

     To the full extent legally enforceable, all Securities shall be held and
owned upon the express condition that the foregoing provisions are exclusive
with respect to the replacement or payment of mutilated, destroyed, lost or
stolen Securities and shall preclude any and all other rights or remedies
notwithstanding any law or statute now existing or hereafter enacted to the
contrary with respect to the replacement or payment of negotiable instruments or
other securities without their surrender.

     2.8  Cancellation and Destruction of Surrendered Securities.  All
Securities surrendered for the purpose of payment, redemption, exchange,
substitution or registration of transfer, shall, if surrendered to the Company
or any agent of the Company or of the Trustee, be delivered to the Trustee, and
the same, together with Securities surrendered to the Trustee for cancellation,
shall be canceled by it, and no Securities shall be issued in lieu thereof
except as expressly permitted by any of the provisions of this Indenture.  The
Trustee shall dispose of canceled Securities in accordance with its customary
procedures and deliver a certificate of disposition thereof to the Company
unless by an Officers' Certificate, the Company shall direct that canceled
Securities be returned to it.  If the Company shall purchase or otherwise
acquire any of the Securities, however, such purchase or acquisition shall not
operate as a payment, redemption or satisfaction of the indebtedness represented
by such Securities unless and until the Company, at its option, shall deliver or
surrender the same to the Trustee for cancellation.

     2.9  Authenticating Agents.  The Trustee may from time to time appoint one
or more Authenticating Agents with respect to one or more series of Securities,
which shall be authorized to act on behalf of the Trustee and subject to its
direction in authenticating and delivering Securities of such series pursuant
hereto in connection with exchanges, registrations of transfer,

                                       22
<PAGE>

redemptions or conversions, as fully to all intents and purposes as though any
such Authenticating Agent had been expressly authorized to authenticate and
deliver Securities of such series, and Securities so authenticated shall be
entitled to the benefits of this Indenture and shall be valid and obligatory for
all purposes as though authenticated by the Trustee.   Wherever reference is
made in this Indenture to the authentication or delivery of Securities by the
Trustee or the Trustee's certificate of authentication, such reference shall be
deemed to include authentication or 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 at all
times be a corporation (including a banking association) organized and doing
business under the laws of the United States or any State or territory thereof
or of the District of Columbia, having a combined capital and surplus of at
least five million dollars ($5,000,000) authorized under such laws to exercise
corporate trust powers and subject to supervision or examination by federal,
state, territorial, or District of Columbia authorities. If such corporation
publishes reports of condition at least annually, pursuant to law or to the
requirements of the aforesaid supervising or examining authority, then for the
purposes of this Section, the combined capital and surplus of such corporation
shall be deemed to be its combined capital and surplus as set forth in its most
recent report of condition so published. If at any time an Authenticating Agent
shall cease to be eligible in accordance with the provisions of this Section, it
shall resign immediately in the manner and with the effect herein specified in
this Section.

     Any corporation succeeding to the corporate agency business of an
Authenticating Agent shall continue to be an Authenticating Agent, if such
successor corporation is otherwise eligible under this Section, without the
execution or filing of any paper or any further act on the part of the Trustee
or the Authenticating Agent or such successor corporation.

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

     The Company agrees to pay to each Authenticating Agent from time to time
reasonable compensation for its services under this Section.

     Any Authenticating Agent by the acceptance of its appointment shall be
deemed to have agreed with the Trustee that:  it will perform and carry out the
duties of an Authenticating Agent as herein set forth, including among other
things the duties to authenticate and deliver Securities of any series for which
it has been appointed an Authenticating Agent when presented to it in

                                       23
<PAGE>

connection with exchanges, registrations of transfer or any redemptions or
conversions thereof; it will furnish from time to time as requested by the
Trustee appropriate records of all transactions carried out by it as
Authenticating Agent and will furnish the Trustee such other information and
reports as the Trustee may reasonably require; it is eligible for appointment as
Authenticating Agent under this Section and will notify the Trustee promptly if
it shall cease to be so qualified; and it will indemnify the Trustee against any
loss, liability or expense incurred by the Trustee and will defend any claim
asserted against the Trustee by reason of any acts or failures to act of the
Authenticating Agent but it shall have no liability for any action taken by it
at the specific written direction of the Trustee.

     2.10 Deferrals of Interest Payment Dates.  If specified as contemplated by
Section 2.1 or Section 2.2 with respect to the Securities of a particular
series, so long as no Event of Default has occurred and is continuing, the
Company shall have the right, at any time during the term of such series, from
time to time to defer the payment of interest on such Securities for such period
or periods as may be specified as contemplated by Section 2.1 (each, an
"Extension Period") during which Extension Periods the Company shall have the
right to make partial payments of interest on any interest payment date. No
Extension Period shall end on a date other than an interest payment date or
extend beyond the Stated Maturity. At the end of any such Extension Period the
Company shall pay all interest then accrued and unpaid on the Securities
(together with Additional Interest or other interest thereon, if any, at the
rate specified for the Securities of such series to the extent permitted by
applicable law).

     2.11 Right of Set-Off.  With respect to the Securities of a series issued
to a CNG Trust, notwithstanding anything to the contrary in this Indenture (but
subject to the last paragraph of Section 6.5), the Company shall have the right
to set off any payment it is otherwise required to make thereunder in respect of
any such Security to the extent the Company has theretofore made, or is
concurrently on the date of such payment making, such payment under the CNG
Guarantee relating to such Security or under Section 6.5 of this Indenture.

     2.12 Shortening or Extension of Stated Maturity.  If specified as
contemplated by Section 2.1 or Section 2.2 with respect to the Securities of a
particular series, the Company shall have the right to (i) shorten the Stated
Maturity of the principal of the Securities of such series at any time to any
date not earlier than the first date on which the Company has the right, if any,
to redeem the Securities of such series, and (ii) extend the Stated Maturity of
the principal of the Securities of such series at any time at its election for
one or more periods, but in no event to a date later than the 49th anniversary
of the first interest payment date following the Original Issue Date of the
Securities of such series; provided that, if the Company elects to exercise its
right to extend the Stated Maturity of the principal of the Securities of such
series pursuant to this clause (ii), at the time such election is made and at
the time of extension (A) the Company is not in bankruptcy, otherwise insolvent
or in liquidation, (B) the Company is not in default in the payment of any
interest or principal on such Securities, (C) in the case of any series of
Securities issued to a CNG Trust, such CNG Trust is not in arrears on payments
of Distributions on the Preferred Securities issued by such CNG Trust and no
deferred Distributions are accumulated, and (D) such Securities are rated not
less than BBB- by Standard & Poor's Ratings Services or

                                       24
<PAGE>

Baa3 by Moody's Investors Service, Inc. or the equivalent by any other
nationally recognized statistical rating organization. In the event the Company
elects to shorten or extend the Stated Maturity of the Securities of a
particular series, it shall give notice to the Trustee (not less than 45 days
prior to the effectiveness thereof), and the Trustee shall give notice of such
shortening or extension to the holders not less than 30 nor more than 60 days
prior to the effectiveness thereof.

     2.13 Agreed Tax Treatment.  Each Security issued hereunder shall provide
that the Company and, by its acceptance of a Security or a beneficial interest
therein, the holder of, and any Person that acquires a beneficial interest in,
such Security agree that for United States federal, state and local tax purposes
it is intended that such Security constitute indebtedness.

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

                                  ARTICLE III
                            REDEMPTION OF SECURITIES

     3.1  Applicability of Article.  Securities of any series which are
redeemable prior to Stated Maturity shall be redeemable in accordance with their
terms and (except as otherwise specified as contemplated by Section 2.1 for
Securities of any series) in accordance with this Article.

     3.2  Mailing of Notice of Redemption.  In case the Company shall desire to
exercise any right to redeem all or, as the case may be, any part of the
Securities of any series pursuant to this Indenture, it shall give notice of
such redemption to holders of the Securities to be redeemed as hereinafter in
this Section provided.

     The Company covenants that it will pay to the Trustee or one or more Paying
Agents (or if the Company is acting as its own Paying Agent, segregate and hold
in trust as provided in Section 4.4), on the date of such redemption, an amount
of money in the applicable currency sufficient to redeem on the redemption date
all the Securities so called for redemption at the applicable redemption price,
together with any accrued interest or any Additional Tax Sums on the Securities
to be redeemed to but excluding the date fixed for redemption.

     Notice of redemption shall be given to the holders of Securities to be
redeemed as a whole or in part by mailing by first class mail, postage prepaid,
a notice of such redemption not less than 20 nor more than 60 days prior to the
date fixed for redemption, unless a shorter time is

                                       25
<PAGE>

specified in the Securities to be redeemed, to their last addresses as they
shall appear upon the Register, but failure to give such notice by mailing in
the manner herein provided to the holder of any Security designated for
redemption as a whole or in part, or any defect therein, shall not affect the
validity of the proceedings for the redemption of any other Security.

     Any notice which is mailed in the manner herein provided shall be
conclusively presumed to have been duly given, whether or not the holder
receives the notice.

     Each such notice of redemption shall identify the Securities to be redeemed
(including CUSIP numbers) and specify the date fixed for redemption and the
redemption price at which Securities are to be redeemed (or if the redemption
price cannot be calculated prior to the time the notice is required to be given,
the manner of calculation thereof), and shall state that payment of the
redemption price of the Securities or portions thereof to be redeemed will be
made at any of the offices or agencies to be maintained by the Company in
accordance with the provisions of Section 4.2 with respect to the Securities to
be redeemed, upon presentation and surrender of such Securities or portions
thereof, and that, if applicable, interest accrued to the date fixed for
redemption will be paid as specified in said notice and on and after said date
interest thereon will cease to accrue and shall also specify, if applicable, the
conversion price and the date on which the right to convert the Securities will
expire and that holders must comply with the terms of the Securities in order to
convert their Securities.  If less than all the Securities of any series are to
be redeemed, the notice of redemption to each holder shall specify such holder's
Securities of such series to be redeemed as a whole or in part.  In case any
Security is to be redeemed in part only, the notice which relates to such
Security shall state the portion of the principal amount thereof to be redeemed
(which shall be equal to an authorized denomination for Securities of such
series), and shall state that on and after the redemption date, upon surrender
of such Security, the holder will receive the redemption price in respect to the
principal amount thereof called for redemption and, without charge, a new
Security or Securities of the same series of authorized denominations for the
principal amount thereof remaining unredeemed.

     In the case of any redemption at the election of the Company, the Company
shall, at least 60 days prior to the date fixed for redemption (unless a shorter
notice shall be satisfactory to the Trustee), notify the Trustee of such
redemption date, the basis for such redemption and of the principal amount of
Securities of the applicable series to be redeemed.  In the case of any
redemption of Securities prior to the expiration of any restriction on such
redemption provided in the terms of such Securities or that is subject to
compliance with conditions provided in the terms of such Securities, the Company
shall furnish the Trustee with an Officers' Certificate evidencing compliance
with such restriction or conditions.  If less than all the Securities of such
series are to be redeemed, thereupon the Trustee shall select, by lot, or in any
manner it shall deem fair, the Securities of such series to be redeemed as a
whole or in part and shall thereafter promptly notify the Company in writing of
the particular Securities of such series or portions thereof to be redeemed.  If
the Securities of any series to be redeemed consist of Securities having
different dates on which the principal or any installment of principal is
payable or different rates of interest, if any, or different methods by which
interest may be determined or have any other different tenor or terms, then the
Company may, by written notice to the Trustee, direct that

                                       26
<PAGE>

Securities of such series to be redeemed shall be selected from among groups of
such Securities having specified tenor or terms and the Trustee shall thereafter
select the particular Securities to be redeemed in the manner set forth in the
preceding sentence from among the group of such Securities so specified.

     3.3  When Securities Called for Redemption Become Due and Payable.  If the
giving of notice of redemption shall have been completed as above provided, the
Securities or portions of Securities specified in such notice shall become due
and payable on the date and at the place or places stated in such notice at the
applicable redemption price, together, if applicable, with any interest accrued
(including any Additional Interest or other interest) to but excluding the date
fixed for redemption, and on and after such date fixed for redemption (unless
the Company shall default in the payment of such Securities at the applicable
redemption price, together with any interest accrued to the date fixed for
redemption) any interest on the Securities or portions of Securities so called
for redemption shall cease to accrue, and, except as provided in Sections 7.5
and 12.4, such Securities shall cease from and after the date fixed for
redemption to be entitled to any benefit or security under this Indenture, and
the holders thereof shall have no right in respect of such Securities except the
right to receive the redemption price thereof and any unpaid interest accrued to
but excluding the date fixed for redemption. On presentation and surrender of
such Securities at said place of payment in said notice specified, such
Securities or portions thereof shall be paid and redeemed by the Company at the
applicable redemption price, together with any interest accrued to but excluding
the date fixed for redemption; provided, however, that, except as otherwise
specified as contemplated by Section 2.1, any regular payment of interest
becoming due on the date fixed for redemption shall be payable to the holders of
the Securities registered as such on the relevant record date as provided in
Article Two hereof. Upon surrender of any Security which is redeemed in part
only, the Company shall execute and the Trustee shall authenticate and deliver
at the expense of the Company a new Security of the same series of like tenor
and terms of authorized denomination in principal amount equal to the unredeemed
portion of the Security so surrendered; except that if a global Security is so
surrendered, the Company shall execute, and the Trustee shall authenticate and
deliver to the Depositary for such global Security, without service charge, a
global Security in a denomination equal to and in exchange for the unredeemed
portion of the principal of the global Security so surrendered.

     If any Security called for redemption shall not be so paid upon surrender
thereof for redemption, the principal shall, until paid, bear interest from the
date fixed for redemption at the rate borne by or prescribed therefor in the
Security, or, in the case of a Security which does not bear interest, at the
rate of interest set forth therefor in the Security to the extent permitted by
law.

                                  ARTICLE IV
                      PARTICULAR COVENANTS OF THE COMPANY

     The Company covenants as follows:

                                       27
<PAGE>

     4.1  Payment of Principal of and Interest on Securities.  The Company will
duly and punctually pay or cause to be paid the principal of and interest
(including any Additional Interest, Special Interest and/or Additional Tax Sums
due thereon), if any, on each of the Securities at the time and places and in
the manner provided herein and in the Securities. Except as otherwise specified
as contemplated by Section 2.1, if the Securities of any series bear interest,
each installment of interest on the Securities of such series may at the option
of the Company be paid (i) by mailing a check or checks for such interest
payable to the Person entitled thereto pursuant to Section 2.3 to the address of
such person as it appears on the Register of the Securities of such series or
(ii) by transfer to an account maintained by the Person entitled thereto as
specified in the Register of Securities, provided that proper transfer
instructions have been received by the record date.

     4.2  Maintenance of Offices or Agencies for Registration of Transfer,
Exchange and Payment of Securities.  So long as any of the Securities shall
remain outstanding, the Company will maintain an office or agency where the
Securities may be presented for registration, conversion, exchange and
registration of transfer as in this Indenture provided, and where notices and
demands to or upon the Company in respect of the Securities or of this Indenture
may be served, and where the Securities may be presented for payment.  In case
the Company shall designate and maintain some office or agency other than the
previously designated office or agency, it shall give the Trustee prompt written
notice thereof.  In case the Company shall fail to maintain any such office or
agency or shall fail to give such notice of the location or of any change in the
location thereof to the Trustee, presentations and demands may be made and
notices may be served at the principal office of the Trustee.

     In addition to such office or agency, the Company may from time to time
constitute and appoint one or more other offices or agencies for such purposes
with respect to Securities of any series, and one or more paying agents for the
payment of Securities of any series, in such cities or in one or more other
cities, and may from time to time rescind such appointments, as the Company may
deem desirable or expedient, and as to which the Company has notified the
Trustee.

     4.3  Appointment to Fill a Vacancy in the Office of Trustee. The Company,
whenever necessary to avoid or fill a vacancy in the office of Trustee, will
appoint, in the manner provided in Section 7.10, a Trustee, so that there shall
at all times be a Trustee with respect to each series of Securities hereunder.

     4.4  Duties of Paying Agent.

          (a)  If the Company shall appoint a Paying Agent other than the
Trustee with respect to Securities of any series, it will cause such Paying
Agent 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
and Section 12.3,

                                       28
<PAGE>

          (i)   that it will hold all sums held by it as such agent for the
     payment of the principal of or interest, if any, on the Securities of such
     series (whether such sums have been paid to it by the Company or by any
     other obligor on the Securities of such series) in trust for the benefit of
     the holders of the Securities of such series entitled to such principal or
     interest and will notify the Trustee of the receipt of sums to be so held,

          (ii)  that it will give the Trustee notice of any failure by the
     Company (or by any other obligor on the Securities of such series) to make
     any payment of the principal of or interest on the Securities of such
     series when the same shall be due and payable, and

          (iii) that it will at any time during the continuance of any Event of
     Default, upon the written request of the Trustee, deliver to the Trustee
     all sums so held in trust by it.

          (b)   Whenever the Company shall have one or more Paying Agents with
respect to the Securities of any series, it will, prior to each due date of the
principal of or any interest on a Security of such series, deposit with a Paying
Agent of such series a sum sufficient to pay the principal or interest so
becoming due, such sum to be held in trust for the benefit of the holders of
Securities of such series entitled to such principal or interest, and (unless
such Paying Agent is the Trustee) the Company will promptly notify the Trustee
of its action or failure so to act.

          (c)   If the Company shall act as its own Paying Agent with respect to
the Securities of any series, it will, on or before each due date of the
principal of or any interest on a Security of such series, set aside, segregate
and hold in trust for the benefit of the holder of such Security, a sum
sufficient to pay such principal or interest so becoming due and will notify the
Trustee of such action, or any failure by it or any other obligor on the
Securities of such series to take such action and will at any time during the
continuance of any Event of Default, upon the written request of the Trustee,
deliver to the Trustee all sums so held in trust by it.

          (d)   Anything in this Section to the contrary notwithstanding, the
Company may, at any time, for the purpose of obtaining a satisfaction and
discharge of this Indenture with respect to one or more or all series of
Securities hereunder, or for any other reason, pay or cause to be paid to the
Trustee all sums held in trust for such series by it, or any Paying Agent
hereunder, as required by this Section, such sums are to be held by the Trustee
upon the trust herein contained; 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.

          (e)   Anything in this Section to the contrary notwithstanding, the
agreement to hold sums in trust as provided in this Section is subject to the
provisions of Sections 12.3 and 12.4.

                                       29
<PAGE>

     4.5  Officers' Certificate as to Defaults; Notices of Certain.  The
Company will, so long as any of the Securities are outstanding, deliver to the
Trustee no later than 120 days after the end of each calendar year, beginning
with the year 2001, a certificate signed by the Company's principal executive
officer, principal financial officer or principal accounting officer stating
that a review has been made under his or her supervision of the activities of
the Company during such year and of the performance under this Indenture and, to
the best of his or her knowledge, the Company has complied with all conditions
and covenants under this Indenture throughout such calendar year, or if there
has been a default in the fulfillment of any such obligation, specifying each
such default known and the nature and status thereof. For purposes of this
Section, such compliance shall be determined without regard to any period of
grace or requirement of notice provided under this Indenture.  In addition, the
Company shall give the notice to the Trustee as and when required by the fourth
paragraph of Section 14.1.

     4.6  Waiver of Covenants.  The Company may omit in any particular instance
to comply with any covenant or condition specifically contained in this
Indenture for the benefit of one or more series of Securities, if before the
time for such compliance the holders of a majority in principal amount of the
Securities of all series affected (all series voting as one class) at the time
outstanding (determined as provided in Section 8.4) shall waive such compliance
in such instance, but no such waiver shall extend to or affect such covenant 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 covenant or condition shall remain in full force and
effect.

     4.7  Additional Tax Sums.  In the case of the Securities of a series issued
to a CNG Trust, so long as no Event of Default has occurred and is continuing
and except as otherwise specified as contemplated by Section 2.1 or Section 2.2,
in the event that (i) a CNG Trust is the holder of all of the Outstanding
Securities of such series, (ii) a Tax Event in respect of such CNG Trust shall
have occurred and be continuing and (iii) the Company shall not have (a)
redeemed the Securities of such series or (b) terminated such CNG Trust pursuant
to the termination provisions of the related Trust Agreement, the Company shall
pay to such CNG Trust (and any permitted successor or assign under the related
Trust Agreement) for so long as such CNG Trust (or its permitted successor or
assignee) is the registered holder of any Securities of such series, such
additional amounts as may be necessary in order that the amount of Distributions
then due and payable by such CNG Trust on the related Preferred Securities and
Common Securities that at any time remain outstanding in accordance with the
terms thereof shall not be reduced as a result of any additional taxes, duties
and other governmental charges to which such CNG Trust has become subject as a
result of such Tax Event (but not including withholding taxes imposed on holders
of such Preferred Securities and Common Securities) (the "Additional Tax Sums").
Whenever in this Indenture or the Securities there is a reference in any context
to the payment of principal of or interest on the Securities, such reference
shall be deemed to include payment of the Additional Tax Sums provided for in
this paragraph to the extent that, in such context, Additional Tax Sums are,
were or would be payable in respect thereof pursuant to the provisions of this
Section and express reference to the payment of Additional Tax Sums (if
applicable) in any provisions hereof shall not be construed as excluding
Additional Tax Sums in those

                                       30
<PAGE>

provisions hereof where such express reference is not made; provided, however,
that the deferral of the payment of interest pursuant to Section 2.10 or the
Securities shall not defer the payment of any Additional Tax Sums that may be
then due and payable.

     4.8  Additional Covenants.  The Company covenants and agrees with each
holder of Securities of a series issued to a CNG Trust that it shall not (i)
declare or pay any dividends or distributions on, or redeem, purchase, acquire,
or make a liquidation payment with respect to, any shares of the Company's
Capital Stock (which includes Common Stock and preferred stock), or (ii) make
any payment of principal of or interest or premium, if any, on or repay,
repurchase or redeem any debt securities of the Company that rank on a parity
with or junior to the Securities of such series or make any guarantee payments
with respect to any CNG Guarantee or other guarantee by the Company of debt
securities of any Subsidiary that by its terms ranks on a parity with or junior
to the Securities of such series (other than (a) dividends or distributions in
Common Stock; (b) any declaration of a dividend in connection with the
implementation of a Rights Plan, the issuance of any Capital Stock of any class
or series of preferred stock of the Company under any Rights Plan or the
redemption or repurchase of any rights distributed pursuant to a Rights Plan;
(c) payments under any CNG Guarantee relating to the Preferred Securities issued
by the CNG Trust holding the Securities of such series; and (d) purchases of
Common Stock related to the issuance of Common Stock or rights under any of the
Company's benefit plans for its directors, officers, employees, consultants or
advisors) if at such time (i) there shall have occurred any event of which the
Company has actual knowledge that (a) with the giving of notice or the lapse of
time or both, would constitute an Event of Default hereunder and (b) in respect
of which the Company shall not have taken reasonable steps to cure, (ii) the
Company shall be in default with respect to its payment of any obligations under
the related CNG Guarantee or (iii) the Company shall have given notice of its
election to begin an Extension Period as provided in Section 2.10 and shall not
have rescinded such notice, or such Extension Period, or any extension thereof,
shall be continuing.

     The Company also covenants with each holder of Securities of a series
issued to a CNG Trust (i) to maintain directly or indirectly 100% ownership of
the Common Securities of such CNG Trust; provided, however, that any permitted
successor or assignee of the Company hereunder may succeed to the Company's
ownership of such Common Securities, (ii) not to voluntarily terminate, wind up
or liquidate such CNG Trust, except (a) in connection with a prepayment in full
of the Securities or a distribution of the Securities of such series to the
holders of Preferred Securities in liquidation of such CNG Trust or (b) in
connection with certain mergers, consolidations or amalgamations permitted by
the relevant Trust Agreement and (iii) to use its reasonable efforts, consistent
with the terms and provisions of such Trust Agreement, to cause such CNG Trust
to remain classified as a grantor trust and not an association taxable as a
corporation for United States federal income tax purposes.

     4.9  Calculation of Original Issue Discount.  The Company shall file with
the Trustee promptly at the end of each calendar year (i) a written notice
specifying the amount of original issue discount (including daily rates and
accrual periods) accrued on outstanding Securities as of the end of such year
and (ii) such other specific information relating to such

                                       31
<PAGE>

original issue discount as may then be relevant under the Internal Revenue Code
of 1986, as amended from time to time.


                                   ARTICLE V
               SECURITYHOLDERS' LISTS AND REPORTS BY THE COMPANY
                               AND THE TRUSTEE


     5.1  Company to Furnish Trustee Information as to the Names and Addresses
of Securityholders.  The Company covenants and agrees that it will furnish or
cause to be furnished to the Trustee, semiannually not more than 5 days after
each record date for payment of interest, and at such other times as the Trustee
may request in writing within 30 days after receipt by the Company of any such
request, a list in such form as the Trustee may reasonably require containing
all information in the possession or control of the Company, or any Paying Agent
or any registrar of the Securities of each series, other than the Trustee, as to
the names and addresses of the holders of Securities of such series obtained (in
the case of each list other than the first list) since the date as of which the
next previous list was furnished; provided, however, that if the Trustee shall
be the registrar of the Securities of such series, no such list need be
furnished; and provided further that the Company shall not be obligated to
provide such a list of Securityholders at any time the list of Securityholders
does not differ from the most recent list of Securityholders given to the
Trustee by the Company.  Any such list may be dated as of a date not more than
fifteen days prior to the time such information is furnished or caused to be
furnished, and need not include information received after such date.

     5.2  Trustee to Preserve Information as to the Names and Addresses of
Securityholders Received by It.

     The Trustee shall comply with the obligations imposed upon it pursuant to
Section 312 of the Trust Indenture Act.

     Each and every holder of Securities, by receiving and holding the same,
agrees with the Company and the Trustee that neither the Company nor the Trustee
nor any Paying Agent nor any registrar shall be held accountable by reason of
the disclosure of any information as to the names and addresses of the holders
of Securities in accordance with Section 312(b) of the Trust Indenture Act,
regardless of the source from which such information was derived, and that the
Trustee shall not be held accountable by reason of mailing any material pursuant
to a request made under Section 312(b) of the Trust Indenture Act.

     5.3  Annual and Other Reports to be Filed by Company with Trustee.

          (a)  The Company covenants and agrees to file with the Trustee within
fifteen 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

                                       32
<PAGE>

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

          (b) The Company covenants and agrees to file with the Trustee and the
Commission, in accordance with the 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 provided
for in this Indenture as may be required from time to time by such rules and
regulations.

          (c) The Company covenants and agrees to transmit to the holders of
Securities within 30 days after the filing thereof with the Trustee, in the
manner and to the extent provided in subsection (c) of Section 5.4 with respect
to reports pursuant to subsection (a) of said Section 5.4, such summaries of any
information, documents and reports required to be filed by the Company pursuant
to subsections (a) and (b) of this Section as may be required by rules and
regulations prescribed from time to time by the Commission.

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

     5.4  Trustee to Transmit Annual Report to Securityholders.

          (a) On or before September 15, 2001, and on or before September 15 in
every year thereafter, if and so long as any Securities are outstanding
hereunder, the Trustee shall transmit to the Securityholders as hereinafter in
this Section provided, a brief report dated as of the preceding September 15
with respect to any of the events specified in Section 313(a) of the Trust
Indenture Act which may have occurred within the previous twelve (12) months
(but if no such event has occurred within such period no report need be
transmitted):

          (b) The Trustee shall transmit to the Securityholders, as hereinafter
provided, a brief report with respect to the character and amount of any
advances (and if the Trustee elects so to state, the circumstances surrounding
the making thereof) made by the Trustee (as such) since the date of the last
report transmitted pursuant to the provisions of subsection (a) of this Section
(or if such report has not yet been so transmitted, since the date of execution
of this Indenture), for the reimbursement of which it claims or may claim a lien
or charge prior to that

                                       33
<PAGE>

of the Securities of any series on property or funds held or collected by it as
Trustee, and which it has not previously reported pursuant to this subsection,
except that the Trustee shall not be required (but may elect) to report such
advances if such advances so remaining unpaid aggregate not more than 10 percent
of the principal amount of Securities of all series outstanding as of the date
of such report, such report to be transmitted within 90 days after such time.

          (c) Reports pursuant to this Section shall be transmitted by mail to
all holders of Securities of any series, as the names and addresses of such
holders shall appear upon the Register of the Securities of such series.

          (d) A copy of each such report shall, at the time of such transmission
to Securityholders, be filed by the Trustee with each stock exchange upon which
the Securities of any series are listed and also with the Commission. The
Company will promptly notify the Trustee when and as the Securities of any
series become listed on any stock exchange.


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


     6.1  Events of Default Defined.  The term "Event of Default" whenever used
herein with respect to Securities of any series shall mean any one of the
following events:

          (a) default in the payment of any installment of interest upon, or any
Additional Tax Sums payable in respect of any interest on, any of the Securities
of such series as and when the same shall become due and payable, and
continuance of such default for a period of 60 days (subject to the deferral of
any due date in the case of an Extension Period); or

          (b) default in the payment of all or any part of the principal of or
any Additional Tax Sums payable in respect of the principal on any of the
Securities of such series as and when the same shall become due and payable
whether upon Maturity, upon any redemption, by declaration or otherwise; or

          (c) failure on the part of the Company duly to observe or perform in
any material respect any covenants or agreements (other than covenants to pay
interest, principal and premium, which are subject to subsections (a) and (b)
above of this Section) on the part of the Company in the Securities or in this
Indenture (including any supplemental indenture or pursuant to any Officers'
Certificate as contemplated by Section 2.1) which are for the benefit of the
Securities of such series, 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 not less than 33% in principal amount
of the Securities of such series and all other series so benefited (all series
voting as one class) at the time outstanding under this Indenture a written
notice specifying such failure and stating that such notice is a "Notice of
Default" hereunder,

                                       34
<PAGE>

unless the Trustee, or the Trustee and the Holders of a principal amount of
Securities of such series not less than the principal amount of Securities the
Holders of which gave such notice, as the case may be, shall agree in writing to
an extension of such period prior to its expiration; provided, however, that the
Trustee or the Trustee and the Holders of such principal amount of Securities of
such series, as the case may be, shall be deemed to have agreed to an extension
of such period if corrective action is initiated by the Company within such
period and is being diligently pursued; or

          (d) the commencement by the Company of a voluntary case under Chapter
7 or Chapter 11 of the federal Bankruptcy Code or any other similar state or
federal law now or hereafter in effect, or the consent by the Company to the
entry of a decree or order for relief in an involuntary case under any such law,
or the consent by the Company to the appointment of or the taking possession by
a liquidating agent or committee, conservator or receiver for the Company or any
substantial part of its property, or the general assignment by the Company for
the benefit of its creditors, or the admission by the Company in writing of its
inability to pay its debts as they become due; or

          (e) the entry of a decree or order for relief by a court having
jurisdiction in the premises in respect of the Company in an involuntary case
under Chapter 7 or Chapter 11 of the federal Bankruptcy Code or any other
similar state or federal law now or hereafter in effect, and the continuance of
any such decree or order unstayed and in effect for a period of 90 days, or the
appointment of or the taking possession by a liquidating agent or committee,
conservator or receiver for the Company or any substantial part of its property,
and the continuance of any such appointment unstayed and in effect for a period
of 90 days.

     If an Event of Default shall have occurred and be continuing, either the
Trustee or the holders of not less than 33% in principal amount of all the then
outstanding Securities of the series as to which such Event of Default has
occurred, by notice in writing to the Company (and to the Trustee if given by
Securityholders), may declare the principal amount (or if Securities of any
series are Original Issue Discount Securities, such portion of the principal
amount as may be specified in the terms of such series) of all the Securities of
such series, together with any accrued interest, to be due and payable
immediately, and upon any such declaration the same shall become and shall be
immediately due and payable; provided, however, that in the case of the
Securities of a series issued to a CNG Trust, if upon an Event of Default, the
Trustee or the holders of at least 33% in principal amount of the outstanding
Securities of such series fail to declare the principal of all the Securities of
that series to be immediately due and payable, the holders of at least 33% in
aggregate liquidation amount of the corresponding series of Preferred Securities
then outstanding shall have such right by a notice in writing to the Company and
the Trustee.

     The foregoing provisions, however, are subject to the condition that if, at
any time after the principal amount (or specified portion thereof) of the
Securities of any one or more series (or of all the Securities, as the case may
be) shall have been so declared due and payable, and before any judgment or
decree for the payment of moneys due shall have been obtained or entered

                                       35
<PAGE>

as hereinafter provided, the Company shall pay or shall deposit with the Trustee
a sum sufficient to pay all matured installments of interest upon all the
Securities of such series (or upon all the Securities, as the case may be) and
the principal of any and all Securities of such series (or of any and all the
Securities, as the case may be) which shall have become due otherwise than by
declaration (with interest on overdue installments of interest to the extent
permitted by law and on such principal at the rate or rates of interest borne
by, or prescribed therefor in, the Securities of each such series to the date of
such payment or deposit) and the amounts payable to the Trustee under Section
7.6, and any and all defaults under the Indenture with respect to Securities of
such series (or all Securities, as the case may be), other than the nonpayment
of principal of and any accrued interest on Securities of such series (or any
Securities, as the case may be) which shall have become due by declaration,
shall have been cured, remedied or waived as provided in Section 6.6, then and
in every such case the holders of a majority in principal amount of the
Securities of such series (or of all the Securities, as the case may be) then
outstanding and as to which such Event of Default has occurred (such series or
all series voting as one class, if more than one series are so entitled) by
written notice to the Company and to the Trustee, may rescind and annul such
declaration and its consequences. In the case of Securities issued to a CNG
Trust, should the holders of such Securities fail to annul such declaration and
waive such default, the holders of a majority in aggregate liquidation amount of
related Preferred Securities shall have such right; but no such rescission and
annulment shall extend to or shall affect any subsequent default, or shall
impair any right consequent thereon.

     In case the Trustee, any holder of Securities or any holder of Preferred
Securities shall have proceeded to enforce any right under this Indenture and
such proceedings shall have been discontinued or abandoned because of such
rescission or annulment or for any other reason or shall have been determined
adversely to the Trustee, such holder of Securities or such holder of Preferred
Securities then and in every such case the Company, the Trustee, the holders of
the Securities of such series (or of all the Securities, as the case may be) and
the holders of Preferred Securities shall be restored respectively to their
former positions and rights hereunder, and all rights, remedies and powers of
the Company and the Trustee, the holders of the Securities of such series (or of
all the Securities, as the case may be) and the holders of Preferred Securities
shall continue as though no such proceedings had been taken.

     6.2  Covenant of Company to Pay to Trustee Whole Amount Due on Securities
on Default in Payment of Interest or Principal.  The Company covenants that
(1) in case default shall be made in the payment of any installment of interest
on any of the Securities of any series as and when the same shall become due and
payable, and such default shall have continued for a period of 30 days (subject
to the deferral of any due date in the case of an Extension Period), or (2) in
case default shall be made in the payment of all or any part of the principal of
any of the Securities of any series as and when the same shall become due and
payable, whether upon Maturity, upon any redemption, by declaration or
otherwise, then, upon demand of the Trustee, the Company will pay to the
Trustee, for the benefit of the holders of the Securities of such series, the
whole amount that then shall have become due and payable on all such Securities
of such series for principal or interest, or both, as the case may be, with
interest upon the overdue principal and installments of interest (to the extent
permitted by law) at the rate or rates of

                                       36
<PAGE>

interest borne by or prescribed therefor in the Securities of such series; and,
in addition thereto, such further amount as shall be sufficient to cover the
costs and expenses of collection, including reasonable compensation to the
Trustee, its agents and counsel, and any expenses or disbursements reasonably
incurred, and all reasonable advances made hereunder by the Trustee, its agents,
attorneys and counsel, except as a result of its negligence or bad faith.

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

     The Trustee shall be entitled and empowered, either in its own name or as
trustee of an express trust, or as attorney-in-fact for the holders of the
Securities of any series, or in any one or more of such capacities (irrespective
of whether the principal of the Securities of such series shall then be due and
payable, whether upon Maturity, upon any redemption, by declaration or
otherwise, and irrespective of whether the Trustee shall have made any demand
pursuant to the provisions of this Section) to file and prove a claim or claims
for the whole amount of principal (or, if the Securities of such series are
Original Issue Discount Securities, such portion of the principal amount as may
be specified in the terms of such series) and interest owing and unpaid in
respect of the Securities of such series and to file such other documents as may
be necessary or advisable in order to have the claims of the Trustee (including
any claim for reasonable compensation of the Trustee, its agents and counsel,
and for reimbursement of all expenses and disbursements reasonably incurred, and
all reasonable advances made hereunder by the Trustee, its agents and counsel,
except as a result of its negligence or bad faith) and of the holders of the
Securities of such series allowed in any equity receivership, insolvency,
bankruptcy, liquidation, arrangement, readjustment, reorganization or any other
judicial proceedings relative to the Company or any other obligor on the
Securities of such series or their creditors, or their property.  The Trustee is
hereby irrevocably appointed (and the successive respective holders of the
Securities of each series by taking and holding the same shall be conclusively
deemed to have so appointed the Trustee) the true and lawful attorney-in-fact of
the respective holders of the Securities of such series, with authority to make
and file in the respective names of the holders of the Securities of such
series, or on behalf of the holders of the Securities of such series as a class,
any proof of debt, amendment of proof of debt, claim, petition or other document
in any such proceeding and to receive payment of any sums becoming distributable
on account thereof, and to execute any such other papers and documents and to do
and perform any and all such acts and things for and on behalf of such holders
of the Securities of such series, as may be necessary or advisable in the
opinion of the Trustee in order to have the respective claims of the Trustee and
of the holders of the Securities of such series allowed in any such proceeding,
and to receive payment of or on account of such claims and to distribute the
same, and any receiver, assignee, trustee, liquidator, sequestrator or other
similar official in any such judicial proceeding is hereby

                                       37
<PAGE>

authorized by each holder to make such payments to the Trustee and, in the event
that the Trustee shall consent to the making of such payments directly to the
holders, to pay to the Trustee any amount due to it under Section 7.6; provided,
however, that nothing herein shall be deemed to authorize the Trustee to
authorize or consent to or vote for or accept or adopt on behalf of any
Securityholder any plan of reorganization, arrangement, adjustment or
composition affecting the Securities of such series or the rights of any holder
thereof, or to authorize the Trustee to vote in respect of the claim of any
holder of Securities of such series in any such proceeding.

     All rights of action and of asserting claims under this Indenture, or under
any of the Securities of any series, may be enforced by the Trustee without the
possession of any of the Securities of such series, or the production thereof on
any trial or other proceeding relative thereto, and any such suit or proceeding
instituted by the Trustee, shall be brought in its own name as trustee of an
express trust, and any recovery of judgment shall be, after provision for the
payment of the reasonable compensation, expenses, disbursements and advances of
such Trustee, its agents and counsel, for the ratable benefit of the holders of
the Securities of such series.

     6.3  Application of Moneys Collected by Trustee.  Any moneys collected by
the Trustee pursuant to Section 6.2 shall be applied in the order following, at
the date or dates fixed by the Trustee for the distribution of such moneys, upon
presentation of the several Securities in respect of which moneys have been
collected, and stamping thereon the payment, if only partially paid, and upon
surrender thereof if fully paid:

     First:  To the payment of all amounts payable to the Trustee under Section
     7.6;

     Second:  In case the principal of the outstanding Securities in respect of
     which moneys have been collected shall not have become due and be unpaid,
     to the payment of any unpaid interest on such Securities, in the order of
     the maturity of the installments of such interest, with interest upon the
     overdue installments of interest (so far as permitted by law and to the
     extent that such interest has been collected by the Trustee) at the rate or
     rates of interest borne by, or prescribed therefor in, such Securities,
     such payments to be made ratably to the persons entitled thereto, without
     discrimination or preference;

     Third:  In case the principal of the outstanding Securities in respect of
     which such moneys have been collected shall have become due and be unpaid,
     whether upon Maturity, upon any redemption, by declaration or otherwise, to
     the payment of the whole amount then owing and unpaid upon such Securities
     for principal and interest, if any, with interest on the overdue principal
     and any installments of interest (so far as permitted by law and to the
     extent that such interest has been collected by the Trustee) at the rate or
     rates of interest borne by, or prescribed therefor in, such Securities; and
     in case such moneys shall be insufficient to pay in full the whole amount
     so due and unpaid upon such Securities, then to the payment of such
     principal and interest, without preference or priority of principal over
     interest, or of interest over principal, or of any installment of interest
     over any other installment of

                                       38
<PAGE>

     interest, or of any Security over any other Security, ratably to the
     aggregate of such unpaid principal and interest; and

     Fourth:  To the payment of the remainder, if any, to the Company, its
     successors or assigns, or to whomsoever may be lawfully entitled to receive
     the same, or as a court of competent jurisdiction may direct.

     6.4  Limitation on Suits by Holders of Securities.  No holder of any
Security of any series shall have any right by virtue or by availing of any
provision of this Indenture to institute any suit, action or proceeding in
equity or at law upon or under or with respect to this Indenture or for the
appointment of a receiver or trustee, or for any other remedy hereunder, unless
such holder previously shall have given to the Trustee written notice of an
Event of Default and of the continuance thereof, as hereinbefore provided, and
unless also the holders of not less than a majority in principal amount of all
the Securities at the time outstanding (considered as one class) shall have made
written request upon the Trustee to institute such action, suit or proceeding in
its own name as Trustee hereunder and shall have offered to the Trustee such
reasonable indemnity as it may require against the costs, expenses and
liabilities to be incurred therein or thereby, and the Trustee, for 60 days
after its receipt of such notice, request and offer of indemnity, shall have
neglected or refused to institute any such action, suit or proceeding and no
direction inconsistent with such written request shall have been given to the
Trustee pursuant to Section 6.6; it being understood and intended, and being
expressly covenanted by the taker and holder of every Security with every other
taker and holder and the Trustee, that no one or more holders of Securities
shall have any right in any manner whatever by virtue or by availing of any
provision of this Indenture to affect, disturb or prejudice the rights of the
holders of any other of such Securities, or to obtain or seek to obtain priority
over or preference to any other such holder, or to enforce any right under this
Indenture, except in the manner herein provided and for the equal, ratable and
common benefit of all holders of Securities. For the protection and enforcement
of the provisions of this Section, each and every Securityholder and the Trustee
shall be entitled to such relief as can be given either at law or in equity.

     Notwithstanding any other provisions in this Indenture, the right of any
holder of any Security to receive payment of the principal of and interest on
such Security, on or after the respective due dates expressed in such Security
(or, in the case of redemption on or after the date fixed for redemption), or to
institute suit for the enforcement of any such payment on or after such
respective dates, shall not be impaired or affected without the consent of such
holder.

     6.5  On Default Trustee May Take Appropriate Action; Direct Action.  In
case of an Event of Default hereunder the Trustee may in its discretion proceed
to protect and enforce the rights vested in it by this Indenture by such
appropriate judicial proceedings as the Trustee shall deem most effectual to
protect and enforce any of such rights, either by suit in equity or by action at
law or by proceeding in bankruptcy or otherwise, whether for the specific
enforcement of any covenant or agreement contained in this Indenture or in aid
of the exercise of any power granted in this Indenture, or to enforce any other
legal or equitable right vested in the Trustee by this Indenture or by law.
Except as provided in the last paragraph of Section 2.7, all powers and

                                       39
<PAGE>

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

     In the case of Securities of a series issued to a CNG Trust, any holder of
the corresponding series of Preferred Securities issued by such CNG Trust shall
have the right, upon the occurrence of an Event of Default described in Section
6.1(a) or (b) above, to institute a suit directly against the Company (a "Direct
Action") for enforcement of payment to such holder of principal of (including
premium, if any) and interest (including any Additional Interest) on the
Securities having a principal amount equal to the aggregate liquidation amount
of such Preferred Securities of the corresponding series held by such holder.
Notwithstanding any payments made to a holder of such Preferred Securities by
the Company pursuant to a Direct Action initiated by such holder, the Company
shall remain obligated to pay the principal of or interest due on the
Securities, and the Company shall be subrogated to the rights of the holder of
such Preferred Securities with respect to payments on the Preferred Securities
to the extent of any payments made by the Company to such holder in any Direct
Action.

     6.6  Rights of Holders of Majority in Principal Amount of Securities to
Direct Trustee and to Waive Default.  The holders of at least a majority in
principal amount of the Securities of any one or more series or of all the
Securities, as the case may be (voting as one class), at the time outstanding
(determined as provided in Section 8.4) 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 under this
Indenture with respect to such one or more series; provided, however, that
subject to Section 7.1, the Trustee shall have the right to decline to follow
any such direction if the Trustee being advised by Opinion of Counsel determines
that the action so directed may not lawfully be taken, or if the Trustee in good
faith shall, by a Responsible Officer or Officers of the Trustee, determine that
the proceedings so directed would be illegal or involve it in personal liability
or be unduly prejudicial to the rights of Securityholders of such one or more
series not parties to such direction, and provided further that nothing in this
Indenture shall impair the right of the Trustee to take any action deemed proper
by the Trustee and which is not inconsistent with such direction by such
Securityholders of such one or more series. The holders of at least a majority
in principal amount of the Securities of all series as to which an Event of
Default hereunder has occurred (all series voting as one class) at the time
outstanding (determined as provided in Section 8.4) and, in the case of any
Preferred Securities of a series issued to a CNG Trust, the

                                       40
<PAGE>

holders of at least a majority in aggregate liquidation amount of the Preferred
Securities issued by such CNG Trust, may waive any past default hereunder with
respect to such series and its consequences, except a default in the payment of
the principal of or interest on any of such Securities or Preferred Securities
or in respect of a covenant or provision hereof which under Article Ten cannot
be modified or amended without the consent of the holder of each Security so
affected. Upon any such waiver, such default shall cease to exist and any Event
of Default arising therefrom shall be deemed to have been cured for every
purpose of this Indenture, but no such waiver shall extend to any subsequent or
other default or impair any right consequent thereon. Any such waiver shall be
deemed to be on behalf of the holders of all the Securities of such series or,
in the case of a waiver by holders of Preferred Securities issued by such CNG
Trust, on behalf of all holders of Preferred Securities issued by such CNG
Trust.

     6.7  Trustee to Give Notice of Defaults Known to It, but May Withhold in
Certain Circumstances.  The Trustee shall, give to the holders of the Securities
of any such series notice of any default hereunder with respect to the
Securities of such series as and to the extent provided by the Trust Indenture
Act, actually known to the Trustee unless such default shall have been cured,
remedied or waived before the giving of such notice provided, however, that in
the case of any default of the character specified in Section 6.1(c), no such
notice to Holders shall be given until at least 30 days after the occurrence
thereof; provided further, however, that, except in the case of default in the
payment of the principal of or interest on any of the Securities of such series,
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 the Securities
of such series.

     6.8  Requirement of an Undertaking to Pay Costs in Certain Suits Under the
Indenture or Against the Trustee.  All parties to this Indenture agree, and
each holder of any Security by his acceptance thereof shall be deemed to have
agreed, that any court may in its discretion require, in any suit for the
enforcement of any right or remedy under this Indenture, or in any suit against
the Trustee for any action taken or omitted by it as Trustee, the filing by any
party litigant in such suit of an undertaking to pay the costs of such suit, and
that such court may in its discretion assess reasonable costs, including
reasonable attorneys' fees and expenses, against any party litigant in such
suit, having due regard to the merits and good faith of the claims or defenses
made by such party litigant; but the provisions of this Section shall not apply
to any suit instituted by the Trustee, to any suit instituted by any holder of
Securities of any series, or group of such Securityholders, holding in the
aggregate more than 10 percent in principal amount of all the Securities (all
series considered as one class) outstanding, or to any suit instituted by any
Securityholder for the enforcement of the payment of the principal of or
interest on any Security, on or after the due date expressed in such Security
(or in the case of any redemption, on or after the date fixed for redemption).

                                  ARTICLE VII
                            CONCERNING THE TRUSTEE

                                       41
<PAGE>

     7.1  Upon Event of Default Occurring and Continuing, Trustee Shall Exercise
Powers Vested in It, and Use Same Degree of Care and Skill in Their Exercise, as
a Prudent Man Would Use.  The Trustee, prior to the occurrence of an Event of
Default and after the curing, remedying or waiving of all Events of Default
which may have occurred, undertakes to perform such duties and only such duties
as are specifically set forth in this Indenture.  In case an Event of Default
has occurred (which has not been cured, remedied or waived) the Trustee shall
exercise such of the rights and powers vested in it by this Indenture, and use
the same degree of care and skill in their exercise, as a prudent man would
exercise or use under the circumstances in the conduct of his own affairs.

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

          (a)    Prior to the occurrence of an Event of Default and after the
curing, remedying or waiving of all Events of Default which may have occurred:

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

           (ii)  in the absence of bad faith on the part of the Trustee, the
     Trustee may conclusively rely, as to the truth of the statements and the
     correctness of the opinions expressed therein, upon any 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;

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

          (c)    The Trustee shall not be liable with respect to any action
taken or omitted to be taken by it in good faith in accordance with the
direction of the holders of Securities pursuant to Section 6.6 relating to the
time, method and place of conducting any proceeding for any remedy available to
the Trustee, or exercising any trust or power conferred upon the Trustee, under
this Indenture;

                                       42
<PAGE>

          (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 7.1; and

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

     7.2    Reliance on Documents, Opinions, Etc. Except as otherwise provided
in Section 7.1:

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

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

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

            (d) 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 Securityholders pursuant to this Indenture, unless such
Securityholders shall have offered to the Trustee such adequate security or
indemnity against the costs, expenses (including attorneys' fees and expenses)
and liabilities that might be incurred by it in complying with such request or
direction;

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

            (f) 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,
approval, bond, debenture, note, other evidence of indebtedness or other paper
or document, unless requested in writing to do so by the holders of Securities
pursuant to Section 6.6, but the Trustee may make such further inquiry or
investigation

                                       43
<PAGE>

into such facts or matters as it may see fit; provided, however, that if the
payment within a reasonable time to the Trustee of the costs, expenses or
liabilities likely to be incurred by it in the making of such investigation is,
in the opinion of the Trustee, not reasonably assured to the Trustee by the
security afforded to it by the terms of this Indenture, the Trustee may require
adequate indemnity against such costs, expenses or liabilities as a condition to
so proceeding; and provided further, that nothing in this subsection (f) shall
require the Trustee to give the Securityholders any notice other than that
required by Section 6.7. The reasonable expense of every such examination shall
be paid by the Company or, if paid by the Trustee, shall be repaid by the
Company upon demand;

            (g) The Trustee may execute any of the trusts or powers hereunder or
perform any duties hereunder either directly or by or through agents or
attorneys and the Trustee shall not be responsible for any misconduct or
negligence on the part of any agent or attorney appointed by it hereunder;
provided, however, that the Trustee shall be responsible for its own negligence
or recklessness with respect to the selection of any such agent or attorney;

            (h) The Trustee shall be under no responsibility for the approval by
it in good faith of any expert for any of the purposes expressed in this
Indenture; and

            (i) The Trustee shall not be deemed to have notice of any Event of
Default unless a Responsible Officer of the Trustee in its Corporate Trust
Office has actual knowledge thereof or unless written notice of any event which
is in fact such a default is received by the Trustee at the Corporate Trust
Office of the Trustee from the Company or any Security holder, and such notice
references the Securities and this Indenture.

     7.3    Trustee Not Liable for Recitals in Indenture or in Securities.  The
recitals contained herein and in the Securities (other than the certificate of
authentication on the Securities) shall be taken as the statements of the
Company, and the Trustee does not assume any responsibility for their
correctness.  The Trustee makes no representations as to the validity or
sufficiency of this Indenture or of the Securities.  The Trustee shall not be
accountable for the use or application by the Company of the proceeds of the
Securities of any series.

     7.4    May Hold Securities.  The Trustee or any agent of the Trustee, in
its individual or any other capacity, may become the owner or pledgee of
Securities and, subject to Section 7.8, with the same rights it would have if it
were not Trustee or such agent.

     7.5    Moneys Received by Trustee to be Held in Trust without Interest.
Subject to the provisions of Section 12.4, all moneys received by the Trustee
shall, until used or applied as herein provided, be held in trust for the
purposes for which they were received, but need not be segregated from other
funds except to the extent required by law.  The Trustee shall be under no
liability for interest on any moneys received by it hereunder.

     7.6    Trustee Entitled to Compensation, Reimbursement and Indemnity.  The
Company covenants and agrees to pay to the Trustee from time to time, and the
Trustee shall be

                                       44
<PAGE>

entitled to, such compensation as shall be agreed to in writing between the
Company and the Trustee (which shall not be limited by any provision of law in
regard to the compensation of a trustee of any express trust), and, the Company
will pay or reimburse the Trustee upon its request for all reasonable expenses,
disbursements and advances incurred or made by the Trustee in connection with
the acceptance or administration of its trust under this Indenture (including
the reasonable compensation and the reasonable expenses and disbursements of its
agents and counsel and of all persons not regularly in its employ) except any
such expense, disbursement or advance as may arise from its negligence or bad
faith. The Company also covenants and agrees to indemnify each of the Trustee,
any predecessor Trustee and their agents for, and to hold them harmless against,
any loss, liability or expense incurred without negligence or bad faith on their
part and arising out of or in connection with the acceptance or administration
of this trust and performance of their duties hereunder, including the
reasonable costs and expenses (including reasonable fees and disbursements of
their counsel) of defending themselves against any claim or liability in
connection with the exercise or performance of any of the powers or duties
hereunder. The obligations of the Company under this Section to compensate the
Trustee, to pay or reimburse the Trustee for expenses, disbursements and
advances and to indemnify and hold harmless the Trustee shall constitute
additional indebtedness hereunder and shall survive the satisfaction and
discharge of this Indenture and the resignation or removal of the Trustee. Such
additional indebtedness shall be secured by a lien prior to that of the
Securities upon all property and funds held or collected by the Trustee as such,
except funds held in trust for the payment of principal of or interest, if any,
on particular Securities.

     Without prejudice to any other rights available to the Trustee under
applicable law, when the Trustee incurs expenses or renders services in
connection with an Event of Default specified in Section 6.1(d) or Section
6.1(e), the expenses (including the reasonable charges and expenses of its
counsel) and the compensation for the services are intended to constitute
expenses of administration under any applicable federal or state bankruptcy,
insolvency or other similar law.

     7.7    Right of Trustee to Rely on Officers' Certificate where No Other
Evidence Specifically Prescribed.  Except as otherwise provided in Section
7.1, whenever in the administration of this Indenture the Trustee shall deem it
necessary or desirable that a matter be proved or established prior to taking,
suffering or omitting to take any action hereunder, the Trustee (unless other
evidence in respect thereof be herein specifically prescribed) may, in the
absence of negligence or bad faith on its part, request and rely upon an
Officers' Certificate which, upon receipt of such request, shall be promptly
delivered by the Company.

     7.8    Disqualification; Conflicting Interests.  If the Trustee has or
shall acquire any 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.

     7.9    Requirements for Eligibility of Trustee.  There shall at all times
be a Trustee hereunder that is a corporation, organized and doing business under
the laws of the United States of America, any state thereof or the District of
Columbia, eligible under Sections 310(a)(1) and

                                       45
<PAGE>

(5) of 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 $50,000,000 subject to supervision or examination by federal or state
authority. 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.

     7.10 Resignation and Removal of Trustee.

          (a)  The Trustee, or any trustee or trustees hereafter appointed, may
at any time resign with respect to one or more or all series of Securities by
giving written notice of such resignation to the Company and by giving to the
holders of Securities of the applicable series notice thereof in the manner and
to the extent provided in subsection (c) of Section 5.4 with respect to reports
pursuant to subsection (a) of Section 5.4. Upon receiving such notice of
resignation and if the Company shall deem it appropriate evidence satisfactory
to it of such mailing, the Company shall promptly appoint a successor Trustee
with respect to the applicable series (it being understood that any successor
Trustee may be appointed with respect to the Securities of one or more or all of
such series and at any time there shall be only one Trustee with respect to the
Securities of any particular series) by written instrument, in duplicate,
executed pursuant to a Resolution of the Company, one copy of which instrument
shall be delivered to the resigning Trustee and one copy to the successor
Trustee. If no successor Trustee shall have been so appointed with respect to
any series and have accepted appointment within 30 days after the mailing of
such notice of resignation, the resigning Trustee may petition any court of
competent jurisdiction for the appointment of a successor Trustee, or any
Securityholder who has been a bona fide holder of a Security or Securities of
the applicable series for at least six months may, subject to the provisions of
Section 6.8, on behalf of himself and all others similarly situated, petition
any such court for the appointment of a successor Trustee. Such court may
thereupon after such notice, if any, as it may deem proper and prescribe,
appoint a successor Trustee.

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

               (i)   The Trustee shall fail to comply with Section 7.8 after
     written request therefor by the Company or by any Securityholder who has
     been a bona fide holder of a Security or Securities of the applicable
     series for at least six months, or

               (ii)  The Trustee shall cease to be eligible in accordance with
     the provisions of Section 7.9 and shall fail to resign after written
     request therefor by the Company or by any such Securityholder, or

               (iii) 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

                                       46
<PAGE>

     appointed, or any public officer shall take charge or control of the
     Trustee or of its property or affairs for the purpose of rehabilitation,
     conservation or liquidation,

then, in any such case, the Company may remove the Trustee with respect to the
applicable series and appoint a successor Trustee with respect to the applicable
series by written instrument, in duplicate, executed pursuant to a Resolution of
the Company, one copy of which instrument shall be delivered to the Trustee so
removed and one copy to the successor Trustee, or, subject to the provisions of
Section 6.8, any Securityholder who has been a bona fide holder of a Security or
Securities of the applicable series for at least six months may, on behalf of
himself and all others similarly situated, petition any court of competent
jurisdiction for the removal of the Trustee and the appointment of a successor
Trustee with respect to the applicable series. Such court may thereupon, after
such notice, if any, as it may deem proper and prescribe, remove the Trustee and
appoint a successor Trustee.

          (c)  The holders of a majority in principal amount of the Securities
of any one series voting as a separate class or all series voting as one class
at the time outstanding (determined as provided in Section 8.4) may at any time
remove the Trustee with respect to the applicable series or all series, as the
case may be, and appoint a successor Trustee with respect to the applicable
series or all series, as the case may be, by written instrument or instruments
signed by such holders or their attorneys-in-fact duly authorized, or by the
affidavits of the permanent chairman and permanent secretary of a meeting of the
Securityholders (as elected in accordance with Section 9.5) evidencing the vote
upon a resolution or resolutions submitted thereto with respect to such removal
and appointment (as provided in Article Nine), and by delivery thereof to the
Trustee so removed, to the successor Trustee and to the Company.

          (d)  Any resignation or removal of the Trustee and any appointment of
a successor Trustee pursuant to any of the provisions of this Section shall
become effective upon acceptance of appointment by the successor Trustee as
provided in Section 7.11.

     7.11 Acceptance by Successor Trustee. Any successor Trustee with respect to
all series of Securities appointed as provided in Section 7.10 shall execute,
acknowledge and deliver to the Company and to its predecessor Trustee an
instrument accepting such appointment hereunder, and thereupon the resignation
or removal of the predecessor Trustee with respect to all series 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
with respect to such series of its predecessor hereunder, with like effect as if
originally named as Trustee herein; but, on the written request of the Company
or of the successor Trustee, the Trustee ceasing to act shall, upon payment of
any amounts then due it pursuant to the provisions of Section 7.6, execute and
deliver an instrument transferring to such successor Trustee all the rights and
powers with respect to such series of the Trustee so ceasing to act. Upon the
request of any such successor Trustee, the Company shall execute any and all
instruments in writing for more fully and certainly vesting in and confirming to
such successor Trustee all such rights and powers. Any Trustee ceasing to act
shall, nevertheless, retain a lien upon all property or funds held or

                                       47
<PAGE>

collected by such Trustee or any successor Trustee to secure any amounts then
due it pursuant to the provisions of Section 7.6.

     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 such 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 such 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 such
series as to which the retiring Trustee is not retiring shall continue to be
vested in the retiring Trustee, and (3) shall add to or change any of the
provisions of this Indenture as shall be necessary to provide for or facilitate
the administration of the trusts hereunder by more than one Trustee, it being
understood that nothing herein or in such supplemental indenture shall
constitute such Trustees co-Trustees of the same trust and that each such
Trustee shall be Trustee of a trust or trusts hereunder separate and apart from
any trust or trusts hereunder administered by any other such Trustee; and upon
the execution and delivery of such supplemental indenture the resignation or
removal of the retiring Trustee shall become effective to the extent provided
therein and each such successor Trustee, without any further act, deed or
conveyance, shall become vested with all the rights, powers, trusts and duties
of the retiring Trustee with respect to the Securities of such series to which
the appointment of such successor Trustee relates; but, on written 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 such series to
which the appointment of such successor Trustee relates.

     No successor Trustee shall accept appointment as provided in this Section
unless at the time of such acceptance such successor Trustee shall be qualified
under the provisions of Section 7.8 and eligible under the provisions of Section
7.9.

     Upon acceptance of appointment by a successor Trustee as provided in this
Section, the successor Trustee shall at the expense of the Company transmit
notice of the succession of such Trustee hereunder to the holders of Securities
of any applicable series in the manner and to the extent provided in subsection
(c) of Section 5.4 with respect to reports pursuant to subsection (a) of said
Section 5.4.

     7.12 Successor to Trustee by Merger, 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 qualified under the provisions of Section 7.8
and eligible under the

                                       48
<PAGE>

provisions of Section 7.9, without the execution or filing of any paper or any
further act on the part of any of the parties hereto, anything herein to the
contrary notwithstanding.

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

     7.13 Limitations on Preferential Collection of Claims by the Trustee.

     The Trustee shall comply with Section 311(a) of the Trust Indenture Act of
1939, excluding any creditor relationship described in Section 311(b) of the
Trust Indenture Act of 1939.  A Trustee who has resigned or been removed shall
be subject to Section 311(a) of the Trust Indenture Act of 1939 to the extent
included therein.


                                  ARTICLE VIII
                         CONCERNING THE SECURITYHOLDERS

     8.1  Evidence of Action by Securityholders. Whenever in this Indenture
it is provided that the holders of a specified percentage in principal amount of
the Securities of any or all series may take any action (including the making of
any demand or request, the giving of any notice, consent, or waiver or the
taking of any other action), the fact at the time of taking any such action the
holders of such specified percentage have joined therein may be evidenced (a) by
any instrument or any number of instruments of similar tenor executed by such
Securityholders in person or by agent or proxy appointed in writing, or (b) by
the record of such holders of Securities voting in favor thereof at any meeting
of such Securityholders duly called and held in accordance with the provisions
of Article Nine, or (c) by a combination of such instrument or instruments and
any such record of such a meeting of such Securityholders.

     If there shall be more than one Trustee acting hereunder with respect to
separate series of Securities, such Trustees shall collaborate, if necessary, in
acting under Article Nine and in determining whether the holders of a specified
percentage in principal amount of the Securities of any or all series have taken
any such action.

                                       49
<PAGE>

     8.2  Proof of Execution of Instruments and of Holding of Securities.
Subject to the provisions of Sections 7.1, 7.2 and 9.5, proof of the execution
of any instrument by a Securityholder or his agent or proxy and proof of the
holding by any person of any of the Securities shall be sufficient if made in
the following manner:

     The fact and date of the execution by any such person of any instrument may
be proved in any reasonable manner acceptable to the Trustee.

     The ownership of Securities of any series shall be proved by the Register
of such Securities of such series, or by certificates of the Security registrar
thereof.

     The Trustee shall not be bound to recognize any person as a Securityholder
unless and until title to the Securities held by him is proved in the manner in
this Article Eight provided.

     The record of any Securityholders' meeting shall be proved in the manner
provided in Section 9.6.

     The Trustee may accept such other proof or require such additional proof of
any matter referred to in this Section as it shall deem reasonable.

     8.3  Who may be Deemed Owners of Securities. Prior to due presentment
for registration of transfer of any Security, the Company, the Trustee and any
agent of the Company or the Trustee may deem and treat the person in whose name
such Security shall be registered upon the Register of Securities of the series
of which such Security is a part as the absolute owner of such Security (whether
or not payments in respect of such Security shall be overdue and notwithstanding
any notation of ownership or other writing thereon) for the purpose of receiving
payment of or an account of the principal of and interest, subject to Section
2.3, on such Security and for all other purposes; and neither the Company nor
the Trustee nor any agent of the Company or the Trustee shall be affected by any
notice to the contrary.  All such payments so made to any such holder for the
time being, or upon his order, shall be valid, and, to the extent of the sum or
sums so paid, effectual to satisfy and discharge the liability for moneys
payable upon any such Security.

     8.4  Securities Owned by Company or Controlled or Controlling Persons
Disregarded for Certain Purposes. In determining whether the holders of the
requisite principal amount of Securities have concurred in any demand,
direction, request, notice, vote, consent, waiver or other action under this
Indenture, Securities which are owned by the Company or any other obligor on the
Securities or by any person directly or indirectly controlling or controlled by
or under direct or indirect common control with the Company or any other obligor
on the Securities shall be disregarded and deemed not to be outstanding for the
purpose of any such determination, provided that for the purposes of determining
whether the Trustee shall be protected in relying on any such demand, direction,
request, notice, vote, consent, waiver or other action, only Securities which a
Responsible Officer of the Trustee assigned to its principal office actually
knows are so owned shall be so disregarded. Securities so

                                       50
<PAGE>

owned which have been pledged in good faith may be regarded as outstanding for
the purposes of this Section, if the pledgee shall establish to the satisfaction
of the Trustee the pledgee's right to vote such Securities and that the pledgee
is not a person directly or indirectly controlling or controlled by or under
direct or indirect common control with the Company or any such other obligor.
Upon request of the Trustee, the Company shall furnish to the Trustee promptly
an Officers' Certificate listing and identifying all Securities, if any, known
by the Company to be owned or held by or for the account of the Company or any
other obligor on the Securities or by any person directly or indirectly
controlling or controlled by or under direct or indirect common control with the
Company or any other obligor on the Securities; and, subject to the provisions
of Section 7.1, the Trustee shall be entitled to accept such Officers'
Certificate as conclusive evidence of the facts therein set forth and of the
fact that all Securities not listed therein are outstanding for the purpose of
any such determination.

     8.5  Instruments Executed by Securityholders Bind Future Holders. At any
time prior to (but not after) the evidencing to the Trustee, as provided in
Section 8.1, of the taking of any action by the holders of the percentage in
principal amount of the Securities specified in this Indenture in connection
with such action, any holder of a Security which is shown by the evidence to be
included in the Securities the holders of which have consented to such action
may, by filing written notice with the Trustee at its principal office and upon
proof of holding as provided in Section 8.2, revoke such action so far as
concerns such Security. Except as aforesaid any such action taken by the holder
of any Security and any direction, demand, request, notice, waiver, consent,
vote or other action of the holder of any Security which by any provisions of
this Indenture is required or permitted to be given shall be conclusive and
binding upon such holder and upon all future holders and owners of such
Security, and of any Security issued in lieu thereof or upon registration of
transfer thereof, irrespective of whether any notation in regard thereto is made
upon such Security. Any action taken by the holders of the percentage in
principal amount of the Securities of any or all series specified in this
Indenture in connection with such action shall be conclusively binding upon the
Company, the Trustee and the holders of all of the Securities of such series
subject, however, to the provisions of Section 7.1.


                                   ARTICLE IX
                           SECURITYHOLDERS' MEETINGS

     9.1  Purposes for which Meetings may be Called. A meeting of holders of
Securities of any or all series may be called at any time and from time to time
pursuant to the provisions of this Article for any of the following purposes:

          (a) To give any notice to the Company or to the Trustee, or to give
any directions to the Trustee, or to consent to the waiving of any default
hereunder and its consequences, or to take any other action authorized to be
taken by holders of Securities of any or all series, as the case may be,
pursuant to any of the provisions of Article Six;

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<PAGE>

          (b) To remove the Trustee and appoint a successor Trustee pursuant to
the provisions of Article Seven;

          (c) To consent to the execution of an indenture or indentures
supplemental hereto pursuant to the provisions of Section 10.2; or

          (d) To take any other action authorized to be taken by or on behalf of
the holders of any specified principal amount of the Securities of any or all
series, as the case may be, under any other provision of this Indenture or under
applicable law.

     9.2  Manner of Calling Meetings. The Trustee may at any time call a meeting
of Securityholders to take any action specified in Section 9.1, to be held at
such time and at such place in the Borough of Manhattan, State of New York, as
the Trustee shall determine. Notice of every meeting of Securityholders setting
forth the time and place of such meeting and in general terms the action
proposed to be taken at such meeting, shall be mailed not less than 21 nor more
than 180 days prior to the date fixed for the meeting.

     9.3  Call of Meeting by Company or Securityholders. In case at any time the
Company, pursuant to a resolution of its Board of Directors, or the holders of
not less than 10 percent in principal amount of the Securities of any or all
series, as the case may be, then outstanding, shall have requested the Trustee
to call a meeting of holders of Securities of any or all series, as the case may
be, to take any action authorized in Section 9.1 by written request setting
forth in reasonable detail the action proposed to be taken at the meeting, and
the Trustee shall not have mailed notice of such meeting within 21 days after
receipt of such request, then the Company or such holders of Securities in the
amount above specified may determine the time and place in the Borough of
Manhattan, State of New York for such meeting and may call such meeting to take
any action authorized in Section 9.1, by mailing notice thereof as provided in
Section 9.2.

     9.4  Who May Attend and Vote at Meetings. To be entitled to vote at any
meeting of Securityholders a person shall (a) be a holder of one or more
Securities with respect to which the meeting is being held, or (b) be a person
appointed by an instrument in writing as proxy by such holder of one or more
Securities. The only persons who shall be entitled to be present or to speak at
any meeting of Securityholders 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.

     9.5  Regulations may be made by Trustee. Notwithstanding any other
provisions of this Indenture, the Trustee may make such reasonable regulations
as it may deem advisable for any meeting of Securityholders, in regard to proof
of the holding of Securities 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 think
fit. Except as otherwise permitted or required by any such regulations, the
holding of Securities shall be

                                       52
<PAGE>

proved in the manner specified in Section 8.2 and the appointment of any proxy
shall be proved in the manner specified in said Section 8.2; provided, however,
that such regulations may provide that written instruments appointing proxies
regular on their face, may be presumed valid and genuine without the proof
hereinabove or in said Section 8.2 specified.

     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 Securityholders as provided in Section 9.3, in which case the
Company or the Securityholders 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 majority vote of the meeting.

     Subject to the provisions of Section 8.4, at any meeting each
Securityholder or proxy shall be entitled to one vote for each $1,000 principal
amount of Securities 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 permanent chairman of the meeting to be not
outstanding; provided, further, that each holder of Original Issue Discount
Securities shall be entitled to one vote for each $1,000 amount which would be
due upon acceleration of his Original Issue Discount Security on the date of the
meeting. Neither a temporary nor a permanent chairman of the meeting shall have
a right to vote other than by virtue of Securities held by him or instruments in
writing as aforesaid duly designating him as the person to vote on behalf of
other Securityholders. Any meeting of Securityholders duly called pursuant to
the provisions of Section 9.2 or 9.3 may be adjourned from time to time, and the
meeting may be held so adjourned without further notice.

     At any meeting of Securityholders, the presence of persons holding or
representing Securities in principal amount sufficient to take action on the
business for the transaction of which such meeting was called shall constitute a
quorum, but, if less than a quorum is present, the person or persons holding or
representing a majority in principal amount of the Securities represented at the
meeting may adjourn such meeting with the same effect for all intents and
purposes, as though a quorum had been present.

     9.6  Manner of Voting at Meetings and Record to be Kept. The vote upon any
resolution submitted to any meeting of Securityholders shall be by written
ballots on which shall be subscribed the signatures of the holders of Securities
or of their representatives by proxy and the principal amount or principal
amounts of the Securities 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 permanent secretary of the meeting their verified written reports in
duplicate of all votes cast at the meeting. A record in duplicate of the
proceedings of each meeting of Securityholders shall be prepared by the
permanent 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 mailed as provided in Section 9.2. The record shall show the principal
amount or principal amounts of the Securities voting in favor of, against, or

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<PAGE>

abstaining from voting on, any resolution. The record shall be signed and
verified by the affidavits of the permanent chairman and permanent secretary of
the meeting and one of the duplicates shall be delivered to the Company and the
other 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.

     9.7  Exercise of Rights of Trustee, Securityholders and Holders of
Preferred Securities Not to be Hindered or Delayed. Nothing in this Article
contained shall be deemed or construed to authorize or permit, by reason of any
call of a meeting of Securityholders or any rights expressly or impliedly
conferred hereunder to make such call any hindrance or delay in the exercise of
any right or rights conferred upon or reserved to the Trustee, to the
Securityholders or the holders of Preferred Securities under any of the
provisions of this Indenture or of the Securities.


                                   ARTICLE X
                            SUPPLEMENTAL INDENTURES

     10.1 Purposes for which Supplemental Indentures may be Entered into Without
Consent of Securityholders. Without the consent of any Securityholders or any
holders of Preferred Securities, the Company, when authorized by a Resolution of
the Company, and the Trustee may from time to time, and at any time enter into
an indenture or indentures supplemental hereto, in form satisfactory to such
Trustee (which shall comply with the provisions of the Trust Indenture Act of
1939 as then in effect), for one or more of the following purposes:

          (a)  To evidence the succession of another corporation to the Company,
or successive successions, and the assumption by the successor corporation of
the covenants, agreements and obligations of the Company pursuant to Article
Eleven hereof;

          (b)  To add to the covenants of the Company such further covenants,
restrictions or conditions as the Company and the Trustee shall consider to be
for the protection of the holders of all or any series of Securities (and if
such covenants, restrictions or conditions are to be for the benefit of less
than all series of Securities, stating that such covenants, restrictions or
conditions are expressly being included solely for the benefit of such series),
and to make the occurrence, or the occurrence and continuance, of a default in
any such additional covenants, restrictions or conditions a default or an Event
of Default permitting the enforcement of all or any of the several remedies
provided in this Indenture as herein set forth; provided, however, that in
respect to any such additional covenant, restriction or condition such
supplemental indenture may provide for a particular period of grace after
default (which period may be shorter or longer than that allowed in the case of
other defaults) or may provide for an

                                       54
<PAGE>

immediate enforcement upon such default or may limit the remedies available to
the Trustee upon such default;

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

          (d)  To change or eliminate any of the provisions of this Indenture;
provided, however, that any such change or elimination shall become effective
only when there is no Security of any series outstanding created prior to the
execution of such supplemental indenture which is entitled to the benefit of
such provision;

          (e)  To establish the form or terms of Securities of any series as
permitted by Section 2.1 and 2.2;

          (f)  To cure any ambiguity or to correct or supplement any provision
contained herein or in any supplemental indenture which may be defective or
inconsistent with any other provisions contained herein or in any supplemental
indenture, or to make such other provision in regard to matters or questions
arising under this Indenture or any supplemental indenture; provided, however,
that such action shall not adversely affect the interest of the holders of
Securities of any series in any material respect or, in the case of the
Securities of a series issued to a CNG Trust and for so long as any of the
corresponding series of Preferred Securities issued by such CNG Trust shall
remain outstanding, the holders of such Preferred Securities;

          (g)  To mortgage or pledge to the Trustee as security for the
Securities any property or assets which the Company may desire to mortgage or
pledge as security for the Securities; and

          (h)  To qualify, or maintain the qualification of, the Indenture under
the Trust Indenture Act.

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

     Any supplemental indenture authorized by the provisions of this Section may
be executed by the Company and the Trustee without the consent of the holders of
any of the Securities at the time outstanding, notwithstanding any of the
provisions of Section 10.2.

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<PAGE>

     10.2 Modification of Indenture with Consent of Holders of a Majority in
Principal Amount of Securities. With the consent (evidenced as provided in
Section 8.1) of the holders of not less than a majority in principal amount of
the Securities of all series at the time outstanding (determined as provided in
Section 8.4) affected by such supplemental indenture (voting as one class), the
Company, when authorized by a Resolution of the Company, and the Trustee may
from time to time and at any time enter into an indenture or indentures
supplemental hereto (which shall be in conformity with the provisions of the
Trust Indenture Act of 1939 as then in effect) for the purpose of adding any
provisions to or changing in any manner or eliminating any of the provisions of
this Indenture or of any supplemental indenture or of modifying in any manner
the rights of the holders of the Securities of each such series; provided,
however, that no such supplemental indenture shall (i) change the fixed Maturity
of any Securities, or reduce the rate or extend the time of payment of any
interest thereon or on any overdue principal amount or reduce the principal
amount thereof, or change the provisions pursuant to which the rate of interest
on any Security is determined if such change could reduce the rate of interest
thereon, or reduce the minimum rate of interest thereon, or reduce any amount
payable upon any redemption thereof, or adversely affect any right to convert
the Securities in accordance therewith, or reduce the amount to be paid at
Maturity or upon redemption in Capital Stock or make the principal thereof or
any interest thereon or on any overdue principal amount payable in any coin or
currency other than that provided in the Security without the consent of the
holder of each Security so affected, (ii) reduce the aforesaid percentage of
Securities, the holders of which are required to consent to any such
supplemental indenture without the consent of the holders of all Securities then
outstanding, (iii) modify any of the provisions of this Section, Section 4.6 or
Section 6.6, 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 holders of all Securities then outstanding or (iv) modify the
provisions of Article Fourteen with respect to the subordination of outstanding
Securities of any series in a manner adverse to the holders thereof without the
consent of the holder of each Security so affected; provided, however, that, in
the case of the Securities of a series issued to a CNG Trust, so long as any of
the corresponding series of Preferred Securities issued by such CNG Trust
remains outstanding, (i) no such amendment shall be made that adversely affects
the holders of such Preferred Securities in any material respect, and no
termination of this Indenture shall occur, and no waiver of any Event of Default
with respect to such series or compliance with any covenant with respect to such
series under this Indenture shall be effective, without the prior consent of the
holders of at least a majority of the aggregate liquidation amount of such
Preferred Securities then outstanding unless and until the principal (and
premium, if any) of the Securities of such series and all accrued and unpaid
interest (including any Additional Interest) thereon have been paid in full; and
(ii) no amendment shall be made to Section 6.5 of this Indenture that would
impair the rights of the holders of such Preferred Securities provided therein
or to this Indenture that requires the consent of each holder of the Securities
of such series without the prior consent of each holder of such Preferred
Securities then outstanding unless and until the principal (and premium, if any)
of the Securities of such series and all accrued and unpaid interest (including
any Additional Interest) thereon have been paid in full.

                                       56
<PAGE>

     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 Preferred Securities,
or which modifies the rights of holders of Securities or holders of Preferred
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 or holders of Preferred Securities of any other series.

     Upon the request of the Company, accompanied by a copy of a Resolution of
the Company certified by the Corporate Secretary or an Assistant Corporate
Secretary of the Company authorizing the execution of any such supplemental
indenture, and upon the filing with the Trustee of evidence of the consent of
Securityholders as aforesaid, the Trustee shall join with the Company in the
execution of such supplemental indenture unless such supplemental indenture
affects the Trustee's own rights, duties or immunities under this Indenture or
otherwise, in which case the Trustee may in its discretion, but shall not be
obligated to, enter into such supplemental indenture.

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

     Promptly after the execution by the Company and the Trustee of any
supplemental indenture pursuant to the provisions of this Section, the Company
shall mail a notice to the holders of Securities of each series so affected,
setting forth in general terms the substance of such supplemental indenture. Any
failure of the Company to mail such notice, or any defect therein, shall not,
however, in any way impair or affect the validity of any such supplemental
indenture.

     10.3 Effect of Supplemental Indentures. Upon the execution of any
supplemental indenture pursuant to the provisions of this Article, this
Indenture shall be and be deemed to be modified and amended in accordance
therewith and the respective rights, limitations of rights, obligations, duties
and immunities under this Indenture of the Trustee, the Company and the holders
of Securities shall thereafter be determined, exercised and enforced hereunder
subject in all respects to such modifications and amendments, and all the terms
and conditions of any such supplemental indenture shall be and be deemed to be
part of the terms and conditions of this Indenture for any and all purposes.

     The Trustee shall be entitled to receive, and subject to the provisions of
Section 7.1 shall be entitled to rely upon, an Opinion of Counsel as conclusive
evidence that any such supplemental indenture complies with the provisions of
this Article.

     10.4 Securities May Bear Notation of Changes by Supplemental Indentures.
Securities authenticated and delivered after the execution of any supplemental
indenture pursuant to the provisions of this Article, or after any action taken
at a Securityholders' meeting pursuant to Article Nine, may bear a notation in
form approved by the Trustee as to any matter provided

                                       57
<PAGE>

for in such supplemental indenture or as to any action taken at any such
meeting. If the Company or the Trustee shall so determine, new Securities so
modified as to conform, in the opinion of the Trustee and the Board of Directors
of the Company, to any modification of this Indenture contained in any such
supplemental indenture may be prepared by the Company, authenticated by the
Trustee and delivered in exchange for the Securities then outstanding.

     10.5 Revocation and Effect of Consents. Subject to Section 8.5, until
an amendment, supplement, waiver or other action becomes effective, a consent to
it by a Securityholder of a Security is a continuing consent conclusive and
binding upon such Securityholder and every subsequent Securityholder of the same
Security or portion thereof, and of any Security issued upon the registration of
transfer thereof or in exchange therefor or in place thereof, even if notation
of the consent is not made on any such Security.

     The Company may, but shall not be obligated to, fix a record date for the
purpose of determining the Securityholders entitled to consent to any amendment,
supplement or waiver. If a record date is fixed, then, notwithstanding the
preceding paragraph, those Persons who were Securityholders at such record date
(or their duly designated proxies), and only such Persons, shall be entitled to
consent or revoke such consent to such amendment, supplement or waiver, whether
or not such Persons continue to be Securityholders after such record date. No
such consent shall be valid or effective for more than 180 days after such
record date.

     After an amendment, supplement, waiver or other action becomes effective,
it shall bind every Securityholder.

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


                                   ARTICLE XI
                   CONSOLIDATION, MERGER, SALE OR CONVEYANCE

     11.1 Company May Consolidate, Etc., Only on Certain Terms.

     The Company shall not consolidate with or merge into, or transfer all or
substantially all of its assets to, any Person, unless:

     (1)  the Person expressly assumes, by an indenture supplemental hereto,
executed and delivered to the Trustee and in form satisfactory to the Trustee,
the due and punctual payment of the principal of and any premium and interest on
all the Securities and the performance of every covenant of this Indenture on
the part of the Company to be performed or observed;

                                       58
<PAGE>

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

     (3)  the Company has delivered to the Trustee an Officers' Certificate and
an Opinion of Counsel each stating that such consolidation, merger or transfer
and such supplemental indenture, if any, comply with this Article and that all
conditions precedent herein provided for relating to such transaction have been
complied with.

     11.2 Successor Person Substituted for Company.

     Upon the Company's consolidation with or merger into, or the transfer of
all or substantially all of the Company's assets to, any Person in accordance
with Section 801, such Person 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 Person had been named as the Company herein; and in the
case of a transfer of all or substantially all of its assets, 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 which shall become such in the
manner described in Section 801) shall be discharged from all obligations and
covenants under this Indenture, the Securities and the Coupons and may be
dissolved and liquidated.

                                  ARTICLE XII
           SATISFACTION AND DISCHARGE OF INDENTURE, UNCLAIMED MONEYS

     12.1 Satisfaction and Discharge of Indenture. If (a) the Company shall
deliver to the Trustee for cancellation all Securities of any series theretofore
authenticated (other than any Securities of such series which shall have been
destroyed, lost or stolen and which shall have been replaced or paid as provided
in Section 2.7) and not theretofore canceled, or (b) all the Securities of such
series not theretofore canceled or delivered to the Trustee for cancellation
shall have become due and payable, or are by their terms to become due and
payable within one year or are to be called for redemption within one year under
arrangements satisfactory to the Trustee for the giving of notice of redemption,
and the Company shall deposit with the Trustee as trust funds the entire amount
sufficient to pay at Maturity or upon redemption all of such Securities not
theretofore canceled or delivered to the Trustee for cancellation, including
principal and any interest due or to become due to such date of Maturity or
redemption date, as the case may be, and if in either case the Company shall
also pay or cause to be paid all other sums payable hereunder by the Company
with respect to Securities of such series, then this Indenture shall cease to be
of further effect with respect to Securities of such series, (except as to (i)
remaining rights of registration of transfer, conversion, substitution and
exchange and the Company's right of optional redemption of Securities of such
series, (ii) rights hereunder of holders to receive payments of principal of,
and any interest on, the Securities of such series, and other rights, duties and
obligations of the holders of Securities of such series as beneficiaries hereof
with respect to the amounts, if any, so deposited with the Trustee, and (iii)
the rights, obligations and

                                       59
<PAGE>

immunities of the Trustee hereunder), and the Trustee, on demand of the Company,
and at the cost and expense of the Company, shall execute proper instruments
acknowledging satisfaction of and discharging this Indenture. The Company hereby
agrees to compensate the Trustee for any services thereafter reasonably and
properly rendered and to reimburse the Trustee for any costs or expenses
theretofore and thereafter reasonably and properly incurred by the Trustee in
connection with this Indenture or the Securities of such series.

     Notwithstanding the satisfaction and discharge of this Indenture with
respect to the Securities of any or all series, the obligations of the Company
to the Trustee under Section 7.6 shall survive.

     12.2 Application by Trustee of Funds Deposited for Payment of Securities.
Subject to Section 12.4, all moneys deposited with the Trustee pursuant to
Section 12.1 shall be held in trust and applied by it to the payment, either
directly or through any Paying Agent (including the Company acting as its own
Paying Agent), to the holders of the particular Securities of such series, for
the payment or redemption of which such moneys have been deposited with the
Trustee, of all sums due and to become due thereon for principal and interest.

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

     12.4 Repayment of Moneys Held by Trustee. Any moneys deposited with the
Trustee or any Paying Agent for the payment of the principal of or any interest
on any Securities of any series and not applied but remaining unclaimed by the
holders of Securities of such series for two years after the date upon which
such payment shall have become due and payable, shall, at the request of the
Company, be repaid to the Company by the Trustee or by such Paying Agent; and
the holder of any of the Securities of such series entitled to receive such
payment shall thereafter look only to the Company for the payment thereof;
provided, however, that the Trustee or such Paying Agent, before being required
to make any such repayment, may at the expense of the Company cause to be
published once a week for two successive weeks (in each case on any day of the
week) in an Authorized Newspaper, or mailed to the registered holders thereof, a
notice that said moneys have not been so applied and that after a date named
therein any unclaimed balance of said money then remaining will be returned to
the Company.


                                  ARTICLE XIII
               IMMUNITY OF INCORPORATORS, STOCKHOLDERS, OFFICERS,
                            DIRECTORS AND EMPLOYEES


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<PAGE>

     13.1 Incorporators, Stockholders, Officers, Directors and Employees of
Company Exempt from Individual Liability.  No recourse under or upon any
obligation, covenant or agreement of this Indenture, or of any Security, or for
any claim based thereon or otherwise in respect thereof, shall be had against
any incorporator, stockholder, officer, director or employee, as such, past,
present or future, of the Company or of any successor corporation, either
directly or through the Company, whether by virtue of any constitution, statute
or rule of law, or by the enforcement of any assessment or penalty or otherwise,
it being expressly understood that this Indenture and the obligations issued
hereunder are solely corporate obligations, and that no personal liability
whatever shall attach to, or is or shall be incurred by, the incorporators,
stockholders, officers, directors or employees, as such, of the Company or any
successor corporation, or any of them, because of the creation of the
indebtedness hereby authorized, or under or by reason of the obligations,
covenants or agreements contained in this Indenture or in any of the Securities
or implied therefrom; and that any and all such personal liability of every name
and nature, either at common law or in equity or by constitution or statute, of,
and any and all such rights and claims against every such incorporator,
stockholder, officer, director or employee, as such, because of the creation of
the indebtedness hereby authorized, or under or by reason of the obligations,
covenants or agreements contained in this Indenture or in any of the Securities
or implied therefrom are hereby expressly waived and released as a condition of
and as a consideration for, the execution of this Indenture and the issue of
such Securities.

                                  ARTICLE XIV
                          SUBORDINATION OF SECURITIES

     14.1 Agreement to Subordinate. The Company, for itself, is successors and
assigns, covenants and agrees, and each holder of a Security of any series
likewise covenants and agrees by his acceptance thereof, that the obligation of
the Company to make any payment on account of the principal of and interest on
each and all of the Securities of any series shall be subordinate and junior in
right of payment to the Company's obligations to the holders of Senior
Indebtedness of the Company.

     In the case of any insolvency, receivership, conservatorship,
reorganization, readjustment of debt, marshaling of assets and liabilities or
similar proceedings or any liquidation or winding-up of or relating to the
Company as a whole, whether voluntary or involuntary, all obligations of the
Company to holders of Senior Indebtedness of the Company shall be entitled to be
paid in full before any payment shall be made on account of the principal of or
interest on any of the Securities. In the event of any such proceeding, after
payment in full of all sums owing with respect to Senior Indebtedness of the
Company, the holders of the Securities of each series, together with the holders
of any obligations of the Company ranking on a parity with the Securities, shall
be entitled to be paid from the remaining assets of the Company the amounts at
the time due and owing on account of unpaid principal of and interest on the
Securities of any series before any payment or other distribution, whether in
cash, property or otherwise, shall be made on account of any capital stock or
any obligations of the Company ranking junior to the Securities. In addition, in
the event of any such proceeding, if any payment or distribution of assets of
the Company of any kind or character whether in cash, property or securities,
including

                                       61
<PAGE>

any such payment or distribution which may be payable or deliverable by reason
of the payment of any other indebtedness of the Company being subordinated to
the payment of the Securities of any series shall be received by the Trustee or
the holders of the Securities of any series before all Senior Indebtedness of
the Company is paid in full, such payment or distribution shall be held in trust
for the benefit of and shall be paid over to the holders of such Senior
Indebtedness of the Company or their representative or representatives or to the
trustee or trustees under any indenture under which any instruments evidencing
any of such Senior Indebtedness of the Company may have been issued, ratably,
for application to the payment of all Senior Indebtedness of the Company
remaining unpaid until all such Senior Indebtedness of the Company shall have
been paid in full, after giving effect to any concurrent payment or distribution
to the holders of such Senior Indebtedness of the Company. The obligations of
the Company in respect of the Securities of all series shall rank on a parity
with any obligations of the Company ranking on a parity with the Securities.
Nothing in this Article shall apply to claims of, or payments to, the Trustee
under or pursuant to Section 7.6.

     The subordination provisions of the foregoing paragraph and Section 14.9
shall not be applicable to amounts at the time due and owing on the Securities
of any series on account of the unpaid principal of or interest on the
Securities of such series for the payment of which funds have been deposited in
trust with the Trustee or any Paying Agent or have been set aside by the Company
in trust in accordance with the provisions of this Indenture; nor shall such
provisions impair any rights, interests, or powers of any secured creditor of
the Company in respect of any security the creation of which is not prohibited
by the provisions of this Indenture.

     The Company shall give written notice to the Trustee within  10 Business
Days after the occurrence of (i) any insolvency, receivership, conservatorship,
reorganization, readjustment of debt, marshaling of assets and liabilities or
similar proceedings or any liquidation or winding-up of or relating to the
Company as a whole, whether voluntary or involuntary, (ii) any Event of Default
described in 6.1(d) or 6.1(e), or (iii) any event specified in Section 14.9.
The Trustee, subject to the provisions of Section 7.1, shall be entitled to
assume that, and may act as if, no such event referred to in the preceding
sentence has occurred unless a Responsible Officer of the Trustee assigned to
the Trustee's corporate trust department has received at the principal office of
the Trustee from the Company or any one or more holders of Senior Indebtedness
of the Company or any trustee or representative therefor (who shall have been
certified or otherwise established to the satisfaction of the Trustee to be such
a holder or trustee or representative) written notice thereof.  Upon any
distribution of assets of the Company referred to in this Article, the Trustee
and holders of the Securities of each series shall be entitled to rely upon any
order or decree of a court of competent jurisdiction in which proceedings
relating to any event specified in the first sentence of this paragraph are
pending for the purpose of ascertaining the persons entitled to participate in
such distribution, the holders of the Senior 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, and the
Trustee, subject to the provisions of Article Seven, and the holders of the
Securities of each series shall be entitled to rely upon a certificate of the
liquidating trustee or agent or other person making any distribution to the
Trustee or to the holders of the Securities of each series for the purpose of
ascertaining the

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persons entitled to participate in such distribution, the holders of the Senior
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. In the absence of any such liquidating trustee, agent or other
person, the Trustee shall be entitled to rely upon a written notice by a Person
representing himself to be a holder of Senior Indebtedness of the Company (or a
trustee or representative on behalf of such holder) as evidence that such Person
is a holder of such Senior Indebtedness (or is such a trustee or
representative). 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 of the Company, 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 as to the amount
of such Senior Indebtedness held by such Person, as to the extent to which such
Person is entitled to participation in such payment or distribution, and as to
other facts pertinent to the rights of such Person under this Article, and if
such evidence is not furnished, the Trustee may defer any payment to such Person
pending judicial determination as to the right of such Person to receive such
payment.

     14.2 Obligation of the Company Unconditional.  Nothing contained in this
Article or elsewhere in this Indenture is intended to or shall impair, as
between the Company and the holders of the Securities of each series, the
obligation of the Company, which is absolute and unconditional, to pay to such
holders the principal of and interest on such Securities of each series when,
where and as the same shall become due and payable, all in accordance with the
terms of such Securities, or is intended to or shall affect the relative rights
of such holders and creditors of the Company other than the holders of the
Senior Indebtedness of the Company, nor shall anything herein or therein 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 of the
Company in respect of cash, property, or securities of the Company received upon
the exercise of any such remedy.

     14.3 Limitations on Duties to Holders of Senior Indebtedness of the
Company.  With respect to the holders of Senior Indebtedness of the Company,
the Trustee undertakes to perform or to observe only such of its covenants and
obligations as are specifically set forth in this Article, and no implied
covenants or obligations with respect to the holders of Senior Indebtedness of
the Company shall be read into this Indenture against the Trustee. The Trustee
shall not be deemed to owe any fiduciary duty to the holders of Senior
Indebtedness of the Company, except with respect to moneys held in trust
pursuant to the first paragraph of Section 14.1.

     14.4 Notice to Trustee of Facts Prohibiting Payment.  Notwithstanding any
of the provisions of this Article or any other provisions of this Indenture,
the Trustee shall not at any time be charged with knowledge of the existence of
any facts which would prohibit the making of any payment of moneys to or by the
Trustee unless and until a Responsible Officer of the Trustee assigned to its
corporate trust department shall have received at the principal office of the
Trustee written notice thereof from the Company or from one or more holders of
Senior

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Indebtedness of the Company or from any trustee therefor or representative
thereof who shall have been certified by the Company or otherwise established to
the reasonable satisfaction of the Trustee to be such a holder or trustee or
representative; and, prior to the receipt of any such written notice, the
Trustee, subject to the provisions of Section 7.1, shall be entitled in all
respects to assume that no such facts exist; provided, however, that, if prior
to the fifth Business Day preceding the date upon which by the terms hereof any
such moneys may become payable for any purpose, or in the event of the execution
of an instrument pursuant to Section 12.1 acknowledging satisfaction and
discharge of this Indenture, then if prior to the second Business Day preceding
the date of such execution, the Trustee shall not have received with respect to
such moneys the notice provided for in this Section, then, anything herein
contained to the contrary notwithstanding, the Trustee shall have full power and
authority to receive such moneys and/or apply the same to the purpose for which
they were received, and shall not be affected by any notice to the contrary
which may be received by it on or after such date; provided, however, no such
application shall affect the obligations under this Article of the Persons
receiving such moneys from the Trustee.

     14.5 Application by Trustee of Moneys Deposited with It. Anything in this
Indenture to the contrary notwithstanding, any deposit of moneys by the Company
with the Trustee or any agent (whether or not in trust) for any payment of the
principal of or interest on any Securities shall, except as provided in Section
14.4, be subject to the provisions of Section 14.1.

     14.6 Subrogation.  Subject to the payment in full of all Senior
Indebtedness of the Company, the holders of the Securities of each series shall
be subrogated to the rights of the holders of such Senior Indebtedness to
receive payments or distributions of assets of the Company applicable to such
Senior Indebtedness until the Securities shall be paid in full, and none of the
payments or distributions to the holders of such Senior Indebtedness to which
the holders of the Securities of any series or the Trustee would be entitled
except for the provisions of this Article or of payments over pursuant to the
provisions of this Article to the holders of such Senior Indebtedness by the
holders of such Securities or the Trustee shall, as among the Company, its
creditors other than the holders of such Senior Indebtedness, and the holders of
such Securities, be deemed to be a payment by the Company to or on account of
such Senior Indebtedness; it being understood that the provisions of this
Article are and are intended solely for the purpose of defining the relative
rights of the holders of such Securities, on the one hand, and the holders of
the Senior Indebtedness of the Company, on the other hand.

     14.7 Subordination Rights Not Impaired by Acts or Omissions of Company or
Holders of Senior Indebtedness of the Company.  No right of any present or
future holders of any Senior Indebtedness of the Company to enforce
subordination as herein provided shall at any time in any way be prejudiced or
impaired by any act or failure to act on the part of the Company or by any act
or failure to act, in good faith, by any such holder, or by any noncompliance by
the Company with the terms, provisions and covenants of this Indenture,
regardless of any knowledge thereof with which any such holder may have or be
otherwise charged. The holders of Senior Indebtedness of the Company may, at any
time or from time to time and in their

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<PAGE>

absolute discretion, change the manner, place or terms of payment, change or
extend the time of payment of, or renew or alter, any such Senior Indebtedness
of the Company, or amend or supplement any instrument pursuant to which any such
Senior Indebtedness of the Company is issued or by which it may be secured, or
release any security therefor, or exercise or refrain from exercising any other
of their rights under the Senior Indebtedness of the Company including, without
limitation, the waiver of default thereunder, all without notice to or assent
from the holders of the Securities of each series or the Trustee and without
affecting the obligations of the Company, the Trustee or the holders of such
Securities under this Article.

     14.8 Authorization of Trustee to Effectuate Subordination of Securities.
Each holder of a Security of any series, by his acceptance thereof, authorizes
and expressly directs the Trustee on his behalf to take such action as may be
necessary or appropriate to effectuate, as between the holders of such
Securities and the holders of Senior Indebtedness of the Company, the
subordination provided in this Article. If, in the event of any proceeding or
other action relating to the Company referred to in the second paragraph of
Section 14.1, a proper claim or proof of debt in the form required in such
proceeding or action is not filed by or on behalf of the holders of the
Securities of any series prior to fifteen days before the expiration of the time
to file such claim or claims, then the holder or holders of Senior Indebtedness
of the Company shall have the right to file and are hereby authorized to file an
appropriate claim for and on behalf of the holders of such Securities.

     14.9 No Payment when Senior Indebtedness in Default.  In the event and
during the continuation of any default in the payment of principal of or
interest on any Senior Indebtedness, or in the event that any event of default
with respect to any Senior Indebtedness shall have occurred and be continuing
and shall have resulted in such Senior Indebtedness becoming or being declared
due and payable prior to the date on which it would otherwise have become due
and payable, unless and until such event of default shall have been cured,
waived or remedied or shall have ceased to exist and such acceleration shall
have been rescinded or annulled or all amounts due on such Senior Indebtedness
are paid in full in cash or other permitted consideration, or in the event any
judicial proceeding shall be pending with respect to any such default in payment
or such event or default (unless and until all amounts due on such Senior
Indebtedness are paid in full in cash or other permitted consideration), then no
payment or distribution of any kind or character, whether in cash, properties or
securities shall be made by the Company on account of principal of (or premium,
if any) or interest (including any Additional Interest) if any, on the
Securities or on account of the purchase or other acquisition of Securities by
the Company or any Subsidiary.

     In the event that, notwithstanding the foregoing, the Company shall make
any payment to the Trustee or the holder of any Security prohibited by the
foregoing provisions of this Section, and if such fact shall, at or prior to the
time of such payment, have been made known to the Trustee or, as the case may
be, such holder, then and in such event payment shall be paid over and delivered
forthwith to the Company.

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<PAGE>

     14.10 Right of Trustee to Hold Senior Indebtedness of the Company.  The
Trustee shall be entitled to all of the rights set forth in this Article in
respect of any Senior Indebtedness of the Company at any time held by it in its
individual capacity to the same extent as any other holder of such Senior
Indebtedness, and nothing in this Indenture shall be construed to deprive the
Trustee of any of its rights as such holder.

     14.11 Article Fourteen Not to Prevent Defaults.  The failure of the
Company to make a payment pursuant to the terms of Securities of any series by
reason of any provision in this Article shall not be construed as preventing the
occurrence of an Event of Default under this Indenture.

                                  ARTICLE XV
                           MISCELLANEOUS PROVISIONS

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

     15.2  Acts of Board, Committee or Officer of Successor Corporation Valid.
Any act or proceeding by any provision of this Indenture authorized or required
to be done or performed by any board, committee or officer or officers of the
Company shall and may be done and performed with like force and effect by the
like board, committee or officer or officers of any corporation that shall at
the time be the lawful sole successor of the Company.

     15.3  Required Notices or Demands may be Served by Mail.  Any notice or
demand which by any provisions of this Indenture is required or permitted to be
given or served by the Trustee, by the holders of Securities or by the holders
of Preferred Securities to or on the Company may be given or served by
registered mail postage prepaid addressed (until another address is filed by the
Company with the Trustee for such purpose), as follows:  Consolidated Natural
Gas Company, 120 Tredegar Street, Richmond, Virginia 23219, Attention:
Treasurer.  Any notice, direction, request, demand, consent or waiver by the
Company, by any Securityholder or by any holder of a Preferred Security to or
upon the Trustee shall be deemed to have been sufficiently given, made or filed,
for all purposes, if given, made or filed in writing at the principal corporate
trust office of the Trustee, 153 West 51/st/ Street, New York, New York 10019
Attention: Global Trust Administration.

     15.4  Separability Clause.  In case any provision in this Indenture, an
Security or any Coupon 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.

     15.5  Payments Due on Saturdays, Sundays, and Holidays.  In any case
where the date of payment of interest on or principal of the Securities of any
series or the date fixed for any

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redemption of any Security of any series shall not be a Business Day, then
payment of interest or principal need not be made on such date, but shall be
made on the next succeeding Business Day with the same force and effect as if
made on the date fixed for the payment of interest on or principal of the
Security or the date fixed for any redemption of any Security of such series,
and no additional interest shall accrue for the period after such date and
before payment.

     15.6  Provisions Required by Trust Indenture Act of 1939 to Control.  If
and to the extent that any provision of this Indenture limits, qualifies or
conflicts with another provision included in this Indenture which is required to
be included in this Indenture by any of Sections 310 to 317, inclusive, of the
Trust Indenture Act through operation of Section 318 thereof, such required
provision shall control.

     15.7  Indenture and Securities to be Construed in Accordance with the Laws
of the State of New York.  This Indenture and each Security shall be governed
by the laws of the State of New York, and for all purposes shall be construed in
accordance with the laws of said State (without regard to conflicts of laws
principles thereof).

     15.8  Provisions of the Indenture and Securities for the Sole Benefit of
the Parties and the Securityholders.  Nothing in this Indenture or in the
Securities, expressed or implied, shall give or be construed to give any person,
firm or corporation, other than the parties hereto, their successors and
assigns, the holders of the Securities, and the holders of any Senior
Indebtedness of the Company, any legal or equitable right, remedy or claim under
or in respect of this Indenture, or under any covenant, condition and provision
herein contained; all its covenants, conditions and provisions being for the
sole benefit of the parties hereto and their successors and assigns and of the
holders of the Securities and, to the extent expressly provided in Sections 4.8,
6.1, 6.5, 6.6, 9.7, 10.1 and 10.2, the holders of Preferred Securities.

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

     15.10 Securities in Foreign Currencies.  Whenever this Indenture provides
for any action by, or any distribution to, holders of Securities denominated in
United States dollars and in any other currency, in the absence of any provision
to the contrary in the form of Security of any particular series, the relative
amount in respect of any Security denominated in a currency other than United
States dollars shall be treated for any such action or distribution as that
amount of United States dollars that could be obtained for such amount on such
reasonable basis of exchange and as of such date as the Company may specify in a
written notice to the Trustee.

     15.11 Table of Contents, Headings, etc.  The Table of Contents and the
titles and headings of the articles and sections of this Indenture have been
inserted for convenience of reference only, are not to be considered a part
hereof, and shall in no way modify or restrict any of the terms or provisions
hereof.

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     Bank One Trust Company, National Association, the party of the second part,
hereby accepts the trusts in this Indenture declared and provided, upon the
terms and conditions, hereinabove set forth.

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<PAGE>

     IN WITNESS WHEREOF, CONSOLIDATED NATURAL GAS COMPANY, the party of the
first part, has caused this Indenture to be signed and acknowledged by its [Vice
President], and BANK ONE TRUST COMPANY, NATIONAL ASSOCIATION, the party of the
second part, has caused this Indenture to be signed and acknowledged by its
_________________________________________, all as of the day and year first
written above.

                              CONSOLIDATED NATURAL GAS COMPANY

                              By: _______________________________
                              Name:
                              Title: Vice President

                              BANK ONE TRUST COMPANY, NATIONAL
                              ASSOCIATION, as trustee


                              By: _______________________________
                              Name:
                              Title:

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