COASTAL CORP
S-3, 1998-01-20
NATURAL GAS TRANSMISSION
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<PAGE>
 
   AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON JANUARY 20, 1998
 
                                                     REGISTRATION NO. 333-
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
 
                      SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, D.C. 20549
 
                               ----------------

                                   FORM S-3
                            REGISTRATION STATEMENT
                                     UNDER
                          THE SECURITIES ACT OF 1933
 
                               ----------------
                            THE COASTAL CORPORATION
            (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)

               DELAWARE                              74-1734212
     (STATE OR OTHER JURISDICTION                 (I.R.S. EMPLOYER
   OF INCORPORATION OR ORGANIZATION)             IDENTIFICATION NO.)

                                 COASTAL TOWER
                              NINE GREENWAY PLAZA
                           HOUSTON, TEXAS 77046-0995
                                (713) 877-1400
  (ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER, INCLUDING AREA CODE, OF
                   REGISTRANT'S PRINCIPAL EXECUTIVE OFFICES)
 
                               ----------------
 
                            AUSTIN M. O'TOOLE, ESQ.
                      SENIOR VICE PRESIDENT AND SECRETARY
                            THE COASTAL CORPORATION
                                 COASTAL TOWER
                              NINE GREENWAY PLAZA
                           HOUSTON, TEXAS 77046-0995
                                (713) 877-1400
(NAME, ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER, INCLUDING AREA CODE,
                             OF AGENT FOR SERVICE)
 
                               ----------------
                                   COPY TO:
                           GERALD S. TANENBAUM, ESQ.
                            CAHILL GORDON & REINDEL
                                80 PINE STREET
                           NEW YORK, NEW YORK 10005
                                (212) 701-3000
  APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO PUBLIC: From time to
time after the effective date of this Registration Statement.
  If the only securities being registered on this Form are being offered
pursuant to dividend or interest reinvestment plans, please check the
following box. [_]
  If any of the securities being registered on this Form are to be offered on
a delayed or continuous basis pursuant to Rule 415 under the Securities Act of
1933, other than securities offered only in connection with dividend or
interest reinvestment plans, please check the following box. [X]
  If this form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following
box and list the Securities Act registration statement number of the earlier
effective registration statement for the same offering. [_]
  If this form is a post-effective amendment filed pursuant to Rule 462(c)
under the Securities Act, check the following box and list the Securities Act
registration statement number of the earlier effective registration statement
for the same offering. [_]
  If delivery of the prospectus is expected to be made pursuant to Rule 434,
please check the following box. [_]
 
                               ----------------

                        CALCULATION OF REGISTRATION FEE
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
<TABLE>
<CAPTION>
                                                                      PROPOSED
                                                       PROPOSED       MAXIMUM
                                        AMOUNT         MAXIMUM       AGGREGATE      AMOUNT OF
     TITLE OF EACH CLASS OF             TO BE       OFFERING PRICE    OFFERING     REGISTRATION
   SECURITIES TO BE REGISTERED     REGISTERED(1)(2)  PER UNIT(3)   PRICE(2)(3)(4)      FEE
- -----------------------------------------------------------------------------------------------
<S>                                <C>              <C>            <C>            <C>
Debt Securities..................
- ---------------------------------                                                              
Preferred Stock (par value $.33
 1/3 per share)..................
- ---------------------------------    $400,000,000        100%       $400,000,000     $118,000 
Common Stock (par value $.33 1/3
 per share)......................    
- ---------------------------------                                                              
Common Stock Warrants............
</TABLE>  
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------

<PAGE>
 
(1) There are being registered hereunder a presently indeterminate number of
    shares of Common Stock, including shares of Common Stock into which
    certain series of Debt Securities and Preferred Stock may be converted and
    for which no separate consideration will be received and for which Common
    Stock Warrants may be exercised.
(2) In U.S. dollars or the equivalent thereof in foreign currency or currency
    units.
(3) Estimated solely for the purpose of calculating the registration fee in
    accordance with Rule 457 under the Securities Act of 1933, as amended.
(4) Exclusive of accrued interest or dividends, if any.
 
                               ----------------
  THE REGISTRANT HEREBY AMENDS THIS REGISTRATION STATEMENT ON SUCH DATE OR
DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT
SHALL FILE A FURTHER AMENDMENT WHICH SPECIFICALLY STATES THAT THIS
REGISTRATION STATEMENT SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH
SECTION 8(A) OF THE SECURITIES ACT OF 1933 OR UNTIL THIS REGISTRATION
STATEMENT SHALL BECOME EFFECTIVE ON SUCH DATE AS THE COMMISSION, ACTING
PURSUANT TO SAID SECTION 8(A), MAY DETERMINE.
 
  PURSUANT TO RULE 429 UNDER THE SECURITIES ACT OF 1933, THIS REGISTRATION
STATEMENT CONTAINS A COMBINED PROSPECTUS THAT ALSO RELATES TO $200,000,000 OF
OTHER SECURITIES REGISTERED ON FORM S-3, FILE NO. 333-10995, WHICH WAS
DECLARED EFFECTIVE ON SEPTEMBER 23, 1996 (THE "PREVIOUSLY REGISTERED
SECURITIES"), WHICH HAVE NOT BEEN OFFERED OR SOLD AS OF THE DATE OF THE FILING
OF THIS REGISTRATION STATEMENT. THIS REGISTRATION STATEMENT CONSTITUTES POST-
EFFECTIVE AMENDMENT NO. 1 TO REGISTRATION STATEMENT FILE NO. 333-10995,
PURSUANT TO WHICH THE TOTAL AMOUNT OF UNSOLD PREVIOUSLY REGISTERED SECURITIES
REGISTERED ON REGISTRATION STATEMENT FILE NO. 333-10995, WITHOUT LIMITATION AS
TO CLASS OF SECURITIES, MAY BE OFFERED AND SOLD AS DEBT SECURITIES, PREFERRED
STOCK, COMMON STOCK AND COMMON STOCK WARRANTS. IN THE EVENT THE PREVIOUSLY
REGISTERED SECURITIES ARE OFFERED AND SOLD PRIOR TO THE EFFECTIVE DATE OF THIS
REGISTRATION STATEMENT, THE AMOUNT OF PREVIOUSLY REGISTERED SECURITIES SO SOLD
WILL NOT BE INCLUDED IN THE PROSPECTUS HEREUNDER.
 
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
<PAGE>
 
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+INFORMATION CONTAINED HEREIN IS SUBJECT TO COMPLETION OR AMENDMENT. A         +
+REGISTRATION STATEMENT RELATING TO THESE SECURITIES HAS BEEN FILED WITH THE   +
+SECURITIES AND EXCHANGE COMMISSION. THESE SECURITIES MAY NOT BE SOLD NOR MAY  +
+OFFERS TO BUY BE ACCEPTED PRIOR TO THE TIME THE REGISTRATION STATEMENT        +
+BECOMES EFFECTIVE. THIS PROSPECTUS SHALL NOT CONSTITUTE AN OFFER TO SELL OR   +
+THE SOLICITATION OF AN OFFER TO BUY NOR SHALL THERE BE ANY SALE OF THESE      +
+SECURITIES IN ANY STATE IN WHICH SUCH OFFER, SOLICITATION OR SALE WOULD BE    +
+UNLAWFUL PRIOR TO REGISTRATION OR QUALIFICATION UNDER THE SECURITIES LAWS OF  +
+ANY SUCH STATE.                                                               +
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
                 SUBJECT TO COMPLETION, DATED JANUARY 20, 1998
 
PROSPECTUS
 
                            THE COASTAL CORPORATION
[LOGO OF THE COASTAL
CORPORATION APPEARS HERE] 
                                DEBT SECURITIES
                                PREFERRED STOCK
                                  COMMON STOCK
                             COMMON STOCK WARRANTS
 
                                  -----------
 
  The Coastal Corporation ("Coastal" or the "Company") may from time to time
offer (i) its unsecured senior debt securities (the "Senior Debt Securities"),
(ii) its unsecured subordinated debt securities (the "Subordinated Debt
Securities" and, together with the Senior Debt Securities, the "Debt
Securities"), which may be convertible into shares of common stock, par value
33 1/3c per share of the Company (the "Common Stock"), (iii) shares of its
preferred stock, par value 33 1/3c per share (the "Preferred Stock"), which may
be convertible into shares of Common Stock or exchangeable for Debt Securities,
(iv) shares of its Common Stock and (v) warrants to purchase shares of its
Common Stock (the "Common Stock Warrants"). The Preferred Stock and the Common
Stock are collectively referred to as the "Equity Securities," and the Debt
Securities, the Equity Securities and the Common Stock Warrants are
collectively referred to as the "Securities." The Securities offered pursuant
to this Prospectus may be offered separately or together in one or more series
up to an aggregate public offering price of $600,000,000 (or the equivalent
thereof in foreign currency or currency units) at individual prices and on
terms to be determined at the time of the offering and set forth in one or more
supplements to this Prospectus (each, a "Prospectus Supplement").
  The specific terms of the Securities in respect of which this Prospectus is
being delivered will be set forth in the applicable Prospectus Supplement and,
among other things, will include, where applicable, (i) in the case of Debt
Securities, the specific designation, aggregate principal amount offered,
ranking, rate or rates of interest or the provisions for determining such rate
or rates and the time of payment thereof, maturity, currency of payment, terms
relating to redemption (whether mandatory, at the option of the Company or the
holder), terms for sinking fund payments, terms for conversion into Common
Stock, additional covenants and the initial public offering price, (ii) in the
case of shares of Preferred Stock, the number of shares, specific title and
stated value, any dividend, liquidation, redemption, conversion, exchange,
voting and other rights and restrictions and the initial public offering price,
(iii) in the case of shares of Common Stock, the number of shares of Common
Stock and the terms of the offering and sale thereof and (iv) in the case of
Common Stock Warrants, the duration, aggregate amount, exercise price and
initial public offering price.
  The applicable Prospectus Supplement will also contain information, where
applicable, about certain U.S. Federal income taxes, accounting and other
considerations relating to, and any listing on a securities exchange of, the
Securities covered by such Prospectus Supplement.
  The Securities may be sold directly by the Company, through agents designated
by the Company from time to time or through underwriters or dealers designated
by the Company from time to time. If any agents of the Company or any dealers
or underwriters are involved in the sale of the Securities in respect of which
this Prospectus is being delivered, the names of such agents, dealers or
underwriters and any applicable agent's commission, dealer's purchase price or
underwriter's discount will be as set forth in or may be calculated from the
applicable Prospectus Supplement. The net proceeds to the Company from such
sale will be the purchase price of such Securities less such commission in the
case of an agent, the purchase price of such Securities in the case of a dealer
or the public offering price of such Securities less such discount in the case
of an underwriter and less, in each case, other attributable issuance expenses.
See "Plan of Distribution" for indemnification arrangements for agents, dealers
and underwriters.
 
                                  -----------
 
 THESE SECURITIES HAVE NOT BEEN APPROVED  OR DISAPPROVED BY THE SECURITIES AND
  EXCHANGE COMMISSION OR ANY STATE  SECURITIES COMMISSION NOR HAS THE SECURI-
   TIES AND  EXCHANGE COMMISSION OR  ANY STATE SECURITIES  COMMISSION PASSED
    UPON  THE ACCURACY OR ADEQUACY  OF THIS PROSPECTUS. ANY  REPRESENTATION
      TO THE CONTRARY IS A CRIMINAL OFFENSE.
 
                                  -----------
 
                  The date of this Prospectus is       , 1998
<PAGE>
 
                             AVAILABLE INFORMATION
 
  The Company is subject to the informational requirements of the Securities
Exchange Act of 1934, as amended (the "Exchange Act"), and, in accordance
therewith, files reports, proxy statements and other information with the
Securities and Exchange Commission (the "Commission"). Such reports, proxy
statements and other information can be inspected and copied at the public
reference facilities maintained by the Commission at 450 Fifth Street, N.W.,
Room 1024, Washington, D.C. 20549, and at the regional offices of the
Commission located at the following addresses: Seven World Trade Center, 13th
Floor, New York, New York 10048 and Northwest Atrium Center, 500 West Madison
Street, Suite 1400, Chicago, Illinois 60661. Copies of such material can be
obtained from the Public Reference Section of the Commission, 450 Fifth
Street, N.W., Washington, D.C. 20549, upon the payment of fees prescribed by
the Commission. In addition, the Commission maintains a Web site that contains
reports, proxy and information statements and other information regarding
registrants that file electronically with the Commission at
http://www.sec.gov. Similar information concerning the Company can also be
inspected at the offices of the New York Stock Exchange, Inc. located at 20
Broad Street, New York, New York 10005.
 
  This Prospectus does not contain all the information set forth in the
Registration Statement on Form S-3 (together with all amendments, exhibits and
schedules thereto, the "Registration Statement"), of which this Prospectus is
a part, which Coastal has filed with the Commission under the Securities Act
of 1933, as amended (the "Securities Act"). Statements contained herein
concerning the provisions of any contract or other document are necessarily
summaries of such contracts or documents, and each statement is qualified in
its entirety by reference to the copy of the applicable contract or document
filed with the Commission. Copies of the Registration Statement are on file at
the offices of the Commission and may be obtained, upon payment of fees
prescribed by the Commission, or may be examined without charge at the public
reference facilities of the Commission described above.
 
                INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE
 
  Coastal hereby incorporates in this Prospectus by reference the following
documents which have been filed with the Commission pursuant to the Exchange
Act (File No. 1-7176):
 
    (a) Coastal's Annual Report on Form 10-K for the year ended December 31,
  1996 (the "1996 Annual Report"); and
 
    (b) Coastal's Quarterly Reports on Form 10-Q for the quarterly periods
  ended March 31, June 30 and September 30, 1997.
 
  All reports and any definitive proxy or information statements filed by
Coastal pursuant to Section 13(a), 13(c), 14 or 15(d) of the Exchange Act
after the date of this Prospectus and prior to the termination of the offering
of the Securities offered hereby shall be deemed to be incorporated by
reference into this Prospectus and to be a part hereof from the date of filing
of such documents. Any statement contained in a document incorporated or
deemed to be incorporated by reference herein, or contained in this
Prospectus, shall be deemed to be modified or superseded for purposes of this
Prospectus to the extent that a statement contained herein or in any other
subsequently filed document that also is or is deemed to be incorporated by
reference herein modifies or supersedes such statement. Any such statement so
modified or superseded shall not be deemed, except as so modified or
superseded, to constitute a part of this Prospectus.
 
  Any person, including any beneficial owner, receiving a copy of this
Prospectus may obtain without charge, upon request, a copy of any of the
documents incorporated by reference herein, except for the exhibits to such
documents (unless such exhibits are specifically incorporated by reference in
such documents). Such requests should be directed to The Coastal Corporation,
Coastal Tower, Nine Greenway Plaza, Houston, Texas 77046-0995, Attention:
Corporate Secretary, telephone number: (713) 877-1400.
 
 
                                       2
<PAGE>
 
                                  THE COMPANY
 
  Coastal, acting through its subsidiaries, is a diversified energy holding
company with subsidiary operations in natural gas gathering, marketing,
processing, storage and transmission; petroleum refining, marketing and
distribution and chemicals; gas and oil exploration and production; coal
mining; and power. The Company was incorporated under the laws of Delaware in
1972 to become the successor parent, through a corporate restructuring, of a
corporate enterprise founded in 1955. The Company's principal office is
located at Coastal Tower, Nine Greenway Plaza, Houston, Texas 77046-0995
(telephone number (713) 877-1400).
 
                                USE OF PROCEEDS
 
  Except as otherwise provided in an applicable Prospectus Supplement, the net
proceeds from the sale of the Securities will be used to repay short-term
borrowings and for the repayment of borrowings under various credit
agreements, including short-term borrowings and credit agreements of
subsidiaries, and for other general corporate purposes. Prior to such uses,
the net proceeds from the sale of Securities will be invested in certificates
of deposit or other highly liquid investments with short-term maturities.
 
                      RATIO OF EARNINGS TO FIXED CHARGES
     AND EARNINGS TO COMBINED FIXED CHARGES AND PREFERRED STOCK DIVIDENDS
 
  A description of the Company's ratio of earnings to fixed charges or
earnings to combined fixed charges and preferred stock dividends, as
applicable, on a consolidated basis, will appear in an applicable Prospectus
Supplement.
 
                        DESCRIPTION OF DEBT SECURITIES
 
  Debt Securities may be issued from time to time under one or more
indentures, each dated as of a date on or prior to the issuance of the Debt
Securities to which it relates. Senior Debt Securities and Subordinated Debt
Securities may be issued pursuant to separate indentures (respectively, a
"Senior Indenture" and a "Subordinated Indenture"), in each case between the
Company and Harris Trust and Savings Bank, as Trustee (the "Trustee"), and in
the form that has been filed as an exhibit to the Registration Statement of
which this Prospectus is a part, subject to such amendments or supplements as
may be adopted from time to time. The Senior Indenture and the Subordinated
Indenture, as amended or supplemented from time to time, are sometimes
referred to individually as an "Indenture" and collectively as the
"Indentures." Each Indenture will be subject to and governed by the Trust
Indenture Act of 1939, as amended (the "TIA"). The statements made hereunder
relating to the Debt Securities and the Indentures are summaries of the
anticipated provisions thereof, do not purport to be complete and are subject
to, and are qualified in their entirety by reference to, all of the provisions
of the applicable Indenture, including the definitions therein of certain
terms and those terms made part of such Indenture by reference to the TIA, as
in effect on the date of such Indenture, and to such Debt Securities. Certain
capitalized terms used below and not defined have the respective meanings
assigned to them in the applicable Indenture.
 
TERMS
 
  The Debt Securities will be unsecured obligations of the Company. The
Indebtedness represented by (i) Senior Debt Securities will rank pari passu in
right of payment with all other unsecured and unsubordinated Indebtedness of
the Company and (ii) Subordinated Debt Securities will be subordinated in
right of payment to the prior payment in full of all Senior Indebtedness (as
defined below) of the Company. See "--Ranking of Debt Securities." The
particular terms of the Debt Securities offered by a Prospectus Supplement
will be described in such Prospectus Supplement, along with any applicable
modifications of or additions to the general terms of the Debt Securities as
described herein and in the applicable Indenture and any applicable U.S.
Federal income tax considerations. Accordingly, for a description of the terms
of any Series of Debt Securities,
 
                                       3
<PAGE>
 
reference must be made to both the Prospectus Supplement relating thereto and
the description of the Debt Securities set forth in this Prospectus.
 
  Each Indenture will provide for the issuance by the Company from time to
time of its Debt Securities in one or more Series. The aggregate principal
amount of Debt Securities which may be issued under each Indenture will be
unlimited and each Indenture will set forth the specific terms of any Series
of Debt Securities or provide that such terms shall be set forth in, or
determined pursuant to, an Authorizing Resolution and/or a supplemental
indenture, if any, relating to such Series.
 
  The specific terms of each Series of Debt Securities will be set forth in
the applicable Prospectus Supplement relating thereto, including the
following, as applicable:
 
    1. the title of such Debt Securities and whether such Debt Securities are
  Senior Debt Securities or Subordinated Debt Securities;
 
    2. the aggregate principal amount of such Debt Securities and any limit
  on such aggregate principal amount;
 
    3. the price (expressed as a percentage of the principal amount thereof)
  at which such Debt Securities will be issued and, if other than the
  principal amount thereof, the portion of the principal amount thereof
  payable upon declaration of acceleration of the maturity thereof, or, if
  applicable, the portion of the principal amount of such Debt Securities
  that is convertible into Common Stock or the method by which any such
  portion shall be determined;
 
    4. if convertible into Common Stock, the terms on which such Debt
  Securities are convertible, including the initial conversion price, the
  conversion period, any events requiring an adjustment of the applicable
  conversion price and any requirements relating to the reservation of such
  shares of Common Stock for purposes of conversion;
 
    5. the date or dates, or the method for determining such date or dates,
  on which the principal of such Debt Securities will be payable and, if
  applicable, the terms on which such maturity may be extended;
 
    6. the rate or rates (which may be fixed or floating), or the method by
  which such rate or rates shall be determined, at which such Debt Securities
  will bear interest, if any;
 
    7. the date or dates, or the method for determining such date or dates,
  from which any such interest will accrue, the dates on which any such
  interest will be payable, the record dates for such interest payment dates,
  or the method by which such dates shall be determined, the persons to whom
  such interest shall be payable, and the basis upon which interest shall be
  calculated if other than that of a 360-day year of twelve 30-day months;
 
    8. the place or places where the principal of and interest, if any, on
  such Debt Securities will be payable, where such Debt Securities may be
  surrendered for registration of transfer or exchange and where notices or
  demands to or upon the Company in respect of such Debt Securities and the
  applicable Indenture may be served;
 
    9. the period or periods, if any, within which, the price or prices at
  which and the other terms and conditions upon which such Debt Securities
  may, pursuant to any optional or mandatory redemption provisions, be
  redeemed, as a whole or in part, at the option of the Company;
 
    10. the obligation, if any, of the Company to redeem, repay or purchase
  such Debt Securities pursuant to any Sinking Fund (as defined in the
  applicable Indenture) or analogous provision or at the option of a holder
  thereof, and the period or periods within which, the price or prices at
  which and the other terms and conditions upon which such Debt Securities
  will be redeemed, repaid or purchased, as a whole or in part, pursuant to
  such obligations;
 
    11. if other than U.S. dollars, the currency or currencies in which the
  principal of and interest, if any, on such Debt Securities are denominated
  and payable, which may be a foreign currency or units of two or more
  foreign currencies or a composite currency or currencies, and the terms and
  conditions relating thereto;
 
                                       4
<PAGE>
 
    12. whether the amount of payments of principal of or interest, if any,
  on such Debt Securities may be determined with reference to an index,
  formula or other method (which index, formula or method may, but need not
  be, based on the yield on or trading price of other securities, including
  United States Treasury securities, or on a currency, currencies, currency
  unit or units, or composite currency or currencies) and the manner in which
  such amounts shall be determined;
 
    13. whether the principal of or interest, if any, on the Debt Securities
  of the Series are to be payable, at the election of the Company or a holder
  thereof, in a currency or currencies, currency unit or units or composite
  currency or currencies other than that in which such Debt Securities are
  denominated or stated to be payable and the period or periods within which,
  and the terms and conditions upon which, such election may be made;
 
    14. provisions, if any, granting special rights to the holders of Debt
  Securities of the Series upon the occurrence of such events as may be
  specified;
 
    15. any deletions from, modifications of or additions to the Events of
  Default or covenants of the Company with respect to Debt Securities of the
  Series, whether or not such Events of Default (as defined below) or
  covenants are consistent with the Events of Default or covenants described
  herein;
 
    16. whether Debt Securities of the Series are to be issuable initially in
  temporary global form and whether any Debt Securities of the Series are to
  be issuable in permanent global form and, if so, whether beneficial owners
  of interests in any such security in permanent global form may exchange
  such interests for Debt Securities of such Series and of like tenor of any
  authorized form and denomination and the circumstances under which any such
  exchanges may occur, if other than in the manner provided in the applicable
  Indenture, and, if Debt Securities of the Series are to be issuable as a
  Global Security (as defined below), the identity of the depository for such
  Series;
 
    17. the applicability, if any, of the defeasance and covenant defeasance
  provisions of the applicable Indenture to the Debt Securities of the
  Series; and
 
    18. any other terms of the Series (which terms shall not be inconsistent
  with the provisions of the Indenture under which the Debt Securities are
  issued).
 
  If so provided in the applicable Prospectus Supplement, the Debt Securities
may be issued at a discount below their principal amount and provide for less
than the entire principal amount thereof to be payable upon declaration of
acceleration of the maturity thereof ("Original Issue Discount Securities").
In such cases, all material U.S. Federal income tax, accounting and other
considerations applicable to Original Issue Discount Securities will be
described in the applicable Prospectus Supplement.
 
  Except as may be set forth in the applicable Prospectus Supplement, the Debt
Securities will not contain any provisions that would limit the ability of the
Company to incur Indebtedness or that would afford holders of Debt Securities
protection in the event of a highly leveraged transaction involving the
Company or in the event of a change of control. Reference is made to the
applicable Prospectus Supplement for information with respect to any deletions
from, modifications of or additions to the Events of Default or covenants of
the Company that are described below, including any addition of a covenant or
other provision providing event risk or similar protection.
 
DENOMINATION, INTEREST, REGISTRATION AND TRANSFER
 
  Unless otherwise described in the applicable Prospectus Supplement, the Debt
Securities of each Series will be issued only in registered form, without
coupons, in denominations of $1,000 and integral multiples thereof, or in such
other currencies or denominations as may be set forth in the applicable
Indenture or specified in, or pursuant to, an Authorizing Resolution and/or
supplemental indenture, if any, relating to such Series of Debt Securities.
 
  Unless otherwise specified in the applicable Prospectus Supplement, the
principal of and interest, if any, on any Series of Debt Securities will be
payable at the corporate trust office of the Trustee, the address
 
                                       5
<PAGE>
 
of which will be stated in the applicable Prospectus Supplement; provided
that, at the option of the Company, payment of interest may be made by check
mailed to the address of the person entitled thereto as it appears in the
applicable register for such Debt Securities.
 
  Subject to certain limitations imposed upon Debt Securities issued in book-
entry form, the Debt Securities of any Series will be exchangeable for any
authorized denomination of other Debt Securities of the same Series and of a
like aggregate principal amount and tenor upon surrender of such Debt
Securities at the corporate trust office of the Trustee or at the office of
any registrar designated by the Company for such purpose. In addition, subject
to certain limitations imposed upon Debt Securities issued in book-entry form,
the Debt Securities of any Series may be surrendered for registration of
transfer or exchange thereof at the corporate trust office of the Trustee or
at the office of any registrar designated by the Company for such purpose. No
service charge will be made for any registration of transfer or exchange, but
the Company may require payment of a sum sufficient to cover any tax or other
governmental charge payable in connection with certain transfers and
exchanges. The Company may act as registrar and may change any registrar
without notice.
 
CERTAIN COVENANTS
 
  The applicable Prospectus Supplement will describe any material covenants in
respect of a Series of Debt Securities that are not described in this
Prospectus. Unless otherwise indicated in the applicable Prospectus
Supplement, Senior Debt Securities will include the covenants described below.
 
 Definitions
 
  "Attributable Debt" will mean, with respect to any Sale and Leaseback
Transaction as of any particular time, the present value (discounted at the
rate of interest implicit in the terms of the lease) of the obligations of the
lessee under such lease for net rental payments during the remaining term of
the lease (including any period for which such lease has been extended or may,
at the option of the Company, be extended).
 
  "Consolidated Net Tangible Assets" will mean the total assets appearing on a
consolidated balance sheet of the Company and its Subsidiaries, less, without
duplication: (i) current liabilities; (ii) reserves for estimated rate refunds
pending the outcome of a rate proceeding to the extent such refunds have not
been finally determined; (iii) all intangible assets; and (iv) deferred income
tax assets.
 
  "Funded Debt" will mean all Indebtedness maturing one year or more from the
date of the creation thereof, all Indebtedness directly or indirectly
renewable or extendible, at the option of the debtor, by its terms or by the
terms of any instrument or agreement relating thereto, to a date one year or
more from the date of the creation thereof, and all Indebtedness under a
revolving credit or similar agreement obligating the lender or lenders to
extend credit over a period of one year or more, even though such Indebtedness
may also conform to the definition of Short-Term Borrowing (as defined in the
applicable Indenture).
 
  "Indebtedness" will mean (i) any liability of any person (a) for borrowed
money, (b) evidenced by a note, debenture or similar instrument (including a
purchase money obligation) given in connection with the acquisition of any
property or assets (other than inventory or similar property acquired in the
ordinary course of business), including securities, or (c) for the payment of
money relating to a Capitalized Lease Obligation (as defined in the applicable
Indenture); (ii) any guarantee by any person of any liability of others
described in the preceding clause (i); and (iii) any amendment, renewal,
extension or refunding of any liability of the types referred to in clauses
(i) and (ii) above.
 
  "Lien" will mean any mortgage, lien, pledge, charge or other security
interest or encumbrance of any kind.
 
  "Principal Domestic Property of the Company" will mean any property, plant,
equipment or facility of the Company which is located in the United States or
any territory or political subdivision thereof, except any property which the
Board of Directors or management of the Company shall determine to be not
material to the business or operations of the Company and its Subsidiaries,
taken as a whole.
 
                                       6
<PAGE>
 
  "Sale and Leaseback Transaction" will have the meaning set forth in the
"Restrictions on Sales and Leasebacks" covenant described below.
 
  "Significant Subsidiary" will mean a Subsidiary, including its Subsidiaries,
which meets any of the following conditions:
 
    (a) the Company's and its other Subsidiaries' investments in and advances
  to the Subsidiary exceed 10 percent of the total assets of the Company and
  its Subsidiaries consolidated as of the end of any two of the three most
  recently completed fiscal years;
 
    (b) the Company's and its other Subsidiaries' proportionate share of the
  total assets of the Subsidiary exceeds 10 percent of the total assets of
  the Company and its Subsidiaries consolidated as of the end of any two of
  the three most recently completed fiscal years; or
 
    (c) the Company's and its other Subsidiaries' equity in the income from
  continuing operations before income taxes, extraordinary items and
  cumulative effect of a change in accounting principles of the Subsidiary
  exceeds 10 percent of such income of the Company and its Subsidiaries
  consolidated as of the end of any two of the three most recently completed
  fiscal years.
 
  "Stated Maturity" when used with respect to any security or any installment
of interest thereon will mean the date specified in such security as the fixed
date on which the principal of such security or such installment of interest
is due and payable.
 
  "Subsidiary" will mean (i) a corporation a majority of whose Capital Stock
with voting power, under ordinary circumstances, to elect directors is at the
time, directly or indirectly, owned by the Company, by the Company and a
Subsidiary (or Subsidiaries) of the Company or by a Subsidiary (or
Subsidiaries) of the Company or (ii) any person (other than a corporation) in
which the Company, a Subsidiary (or Subsidiaries) of the Company or the
Company and a Subsidiary (or Subsidiaries) of the Company, directly or
indirectly, at the date of determination thereof has at least majority
ownership interest; provided that no corporation shall be deemed a Subsidiary
until the Company, a Subsidiary (or Subsidiaries) of the Company or the
Company and a Subsidiary (or Subsidiaries) of the Company acquires more than
50% of the outstanding voting stock thereof and has elected a majority of its
board of directors.
 
 Restrictions on Liens
 
  The Company will not incur, create, assume or otherwise become liable with
respect to any Indebtedness secured by a Lien, or guarantee any Indebtedness
with a guarantee which is secured by a Lien, on any Principal Domestic
Property of the Company or any shares of stock or Indebtedness of any
Significant Subsidiary, without effectively providing that the Debt Securities
of each Series (together with, if the Company shall so determine, any other
Indebtedness of the Company then existing or thereafter created ranking
equally with the Debt Securities of each Series) shall be secured equally and
ratably with (or, at the option of the Company, prior to) such secured
Indebtedness, so long as such secured Indebtedness shall be so secured;
provided, however, that this covenant will not apply to Indebtedness secured
by: (a) Liens existing on the date of the Indenture; (b) Liens in favor of
governmental bodies to secure progress, advance or other payments; (c) Liens
existing on property, shares of stock or Indebtedness at the time of
acquisition thereof (including acquisition through lease, merger or
consolidation) or Liens to secure the payment of all or any part of the
purchase price thereof or the cost of construction, installation, renovation,
improvement or development thereon or thereof or to secure any Indebtedness
incurred prior to, at the time of, or within 360 days after the later of the
acquisition, completion of such construction, installation, renovation,
improvement or development or the commencement of full operation of such
property or within 360 days after the acquisition of such shares or
Indebtedness for the purpose of financing all or any part of the purchase
price thereof; (d) Liens securing Indebtedness in an aggregate amount which,
at the time of incurrence and together with all outstanding Attributable Debt
in respect of Sale and Leaseback Transactions permitted by clause (y) in the
"Restrictions on Sales and Leasebacks" covenant, does not exceed ten percent
of the Consolidated Net Tangible Assets of the Company; (e) Liens securing
Indebtedness
 
                                       7
<PAGE>
 
other than Funded Debt; and (f) any extension, renewal or replacement (or
successive extensions, renewals or replacements), as a whole or in part, of
any Lien referred to in the foregoing clauses (a) through (e) inclusive;
provided that such extension, renewal or replacement of such Lien is limited
to all or any part of the same property, shares of stock or Indebtedness that
secured the Lien extended, renewed or replaced (plus improvements on such
property), and that such secured Indebtedness at such time is not increased.
 
 Restrictions on Sales and Leasebacks
 
  The Company will not sell or transfer any Principal Domestic Property of the
Company, with the Company taking back a lease of such Principal Domestic
Property of the Company (a "Sale and Leaseback Transaction"), unless (i) such
Principal Domestic Property of the Company is sold within 360 days from the
date of acquisition of such Principal Domestic Property of the Company or the
date of the completion of construction or commencement of full operations of
such Principal Domestic Property of the Company, whichever is later, or (ii)
the Company, within 120 days after such sale, applies or causes to be applied
to the retirement of Funded Debt of the Company or any Subsidiary (other than
Funded Debt of the Company which by its terms or the terms of the instrument
pursuant to which it was issued is subordinate in right of payment to the Debt
Securities of each Series) an amount not less than the greater of (A) the net
proceeds of the sale of such Principal Domestic Property of the Company or (B)
the fair value (as determined in any manner approved by the Board of
Directors) of such Principal Domestic Property of the Company. The provisions
of this covenant shall not prevent a Sale and Leaseback Transaction (x) if the
lease entered into by the Company in connection therewith is for a period,
including renewals, of not more than 36 months or (y) if the Company would, at
the time of entering into such Sale and Leaseback Transaction, be entitled,
without equally and ratably securing the Debt Securities, to create or assume
a Lien on such Principal Domestic Property of the Company securing
Indebtedness in an amount at least equal to the Attributable Debt in respect
of such Sale and Leaseback Transaction pursuant to clause (d) above in the
"Restrictions on Liens" covenant.
 
MERGER, CONSOLIDATION OR SALE OF ASSETS
 
  The Company shall not consolidate with or merge with or into any other
corporation or transfer all or substantially all of its property and assets as
an entirety to any person, unless (i) either the Company shall be the
continuing person, or the person (if other than the Company) formed by such
consolidation or into which the Company is merged or to which all or
substantially all of the properties and assets of the Company as an entirety
are transferred is a corporation organized and existing under the laws of the
United States or any State thereof or the District of Columbia which expressly
assumes all of the obligations of the Company under each Series of Debt
Securities and the Indenture with respect to each such Series and (ii)
immediately before and immediately after giving effect to such transaction, no
Event of Default and no event which, after notice or passage of time or both,
would become an Event of Default shall have occurred and be continuing.
Notwithstanding the foregoing, any Subsidiary may consolidate with, merge with
or into or transfer all or part of its properties and assets to the Company or
any other Subsidiary or Subsidiaries.
 
RANKING OF DEBT SECURITIES
 
 Senior Debt Securities
 
  The Senior Debt Securities will constitute unsecured senior obligations of
the Company and will rank pari passu in right of payment with all other Senior
Indebtedness (as defined below) of the Company. However, the Senior Debt
Securities will be effectively subordinated in right of payment to all secured
Indebtedness of the Company to the extent of the value of the assets securing
such Indebtedness and will be effectively subordinated to all indebtedness of
the Company's Subsidiaries and all mandatory redemption preferred stock of the
Company's Subsidiaries. As of September 30, 1997, the Company had
approximately $2,020.1 million of Senior Indebtedness outstanding and the
Company's Subsidiaries had outstanding an aggregate of approximately $1,834.9
million of Indebtedness owed to non-affiliates ($325.0 million of which has
been guaranteed by the Company). Additionally, as of September 30, 1997, the
Company had guaranteed approximately $97.2 million
 
                                       8
<PAGE>
 
of outstanding Indebtedness of various joint ventures, partnerships and other
parties, and Subsidiaries of the Company had guaranteed approximately $29.0
million of outstanding Indebtedness of affiliates. Except as otherwise set
forth in the applicable Senior Indenture or specified in an Authorizing
Resolution and/or supplemental indenture, if any, relating to a Series of
Senior Debt Securities to be issued, there will be no limitations in any
Senior Indenture on the amount of additional Indebtedness which may rank pari
passu with the Senior Debt Securities or on the amount of Indebtedness,
secured or otherwise, which may be incurred or preferred stock which may be
issued by any of the Company's Subsidiaries; provided that the incurrence of
secured Indebtedness by the Company is subject to the limitations set forth in
the "Restrictions on Liens" covenant.
 
 Subordinated Debt Securities
 
  The Subordinated Debt Securities will constitute unsecured obligations of
the Company. Unless otherwise provided in the applicable Prospectus
Supplement, the payment of principal of, interest on and all other amounts
owing in respect of the Subordinated Debt Securities will be subordinated in
right of payment to the prior payment in full in cash of principal of,
interest on and all other amounts owing in respect of all Senior Indebtedness
of the Company. Upon any payment or distribution of assets of the Company of
any kind or character, whether in cash, property or securities, to creditors
upon any total or partial liquidation, dissolution, winding up,
reorganization, assignment for the benefit of creditors or marshaling of
assets of the Company or in a bankruptcy, reorganization, insolvency,
receivership or other similar proceeding relating to the Company or its
property, whether voluntary or involuntary, all principal of, interest on and
all other amounts due or to become due upon all Senior Indebtedness shall
first be paid in full in cash, or such payment duly provided for to the
satisfaction of the holders of Senior Indebtedness, before any payment or
distribution of any kind or character is made on account of any principal of,
interest on or other amounts owing in respect of the Subordinated Debt
Securities, or for the acquisition of any of the Subordinated Debt Securities
for cash, property or otherwise. If any default occurs and is continuing in
the payment when due, whether at maturity, upon any redemption, by declaration
or otherwise, of any principal of, interest on, unpaid drawings for letters of
credit issued in respect of, or regularly accruing fees with respect to, any
Senior Indebtedness, no payment of any kind or character shall be made by or
on behalf of the Company or any other person on its or their behalf with
respect to any principal of, interest on or other amounts owing in respect of
the Subordinated Debt Securities or to acquire any of the Subordinated Debt
Securities for cash, property or otherwise.
 
  In addition, if any other event of default occurs and is continuing with
respect to any Senior Indebtedness, as such event of default is defined in the
instrument creating or evidencing such Senior Indebtedness, permitting the
holders of such Senior Indebtedness then outstanding to accelerate the
maturity thereof and if the Representative (as defined in the applicable
Indenture) for the respective issue of Senior Indebtedness gives written
notice of the event of default to the Trustee (a "Default Notice"), then,
unless and until all events of default have been cured or waived or have
ceased to exist or the Trustee receives notice from the Representative for the
respective issue of Senior Indebtedness terminating the Blockage Period (as
defined below), during the 180 days after the delivery of such Default Notice
(the "Blockage Period"), neither the Company nor any other person on its
behalf shall (x) make any payment of any kind or character with respect to any
principal of, interest on or other amounts owing in respect of the
Subordinated Debt Securities or (y) acquire any of the Subordinated Debt
Securities for cash, property or otherwise. Notwithstanding anything herein to
the contrary, in no event will a Blockage Period extend beyond 180 days from
the date the payment on the Subordinated Debt Securities was due and only one
such Blockage Period may be commenced within any 360 consecutive days. No
event of default which existed or was continuing on the date of the
commencement of any Blockage Period with respect to the Senior Indebtedness
shall be, or be made, the basis for commencement of a second Blockage Period
by the Representative of such Senior Indebtedness whether or not within a
period of 360 consecutive days, unless such event of default shall have been
cured or waived for a period of not less than 90 consecutive days (it being
acknowledged that any subsequent action, or any breach of any financial
covenants for a period commencing after the date of commencement of such
Blockage Period that, in either case, would give rise to an event of default
pursuant to any provisions under which an event of default previously existed
or was continuing shall constitute a new event of default for this purpose).
 
                                       9
<PAGE>
 
  The Subordinated Indentures will not restrict the amount of Senior
Indebtedness or other Indebtedness of the Company or any Subsidiary. As a
result of the foregoing provisions, in the event of the Company's insolvency,
holders of the Subordinated Debt Securities may recover ratably less than
general creditors of the Company.
 
  "Senior Indebtedness" will be defined in each Subordinated Indenture as
Indebtedness of the Company, whether outstanding on the date of issue of any
Subordinated Debt Securities or thereafter created, incurred, assumed or
guaranteed by the Company, other than the following: (i) any Indebtedness as
to which, by the terms of the instrument creating or evidencing such
Indebtedness, it is expressly provided that such Indebtedness is subordinated
in right of payment to all Indebtedness of the Company not expressly
subordinated to such Indebtedness, (ii) any Indebtedness which, by its terms,
expressly refers to the Subordinated Debt Securities and states that such
Indebtedness shall not be senior, shall be pari passu or shall be subordinated
in right of payment to the Subordinated Debt Securities, (iii) the
Subordinated Debt Securities of the same or another Series and (iv)
Indebtedness of or amounts owed by the Company for compensation to employees,
or for goods, materials and services purchased in the ordinary course of
business.
 
DISCHARGE
 
  Unless otherwise provided in the applicable Prospectus Supplement, the
Company generally may terminate its obligations under any Series of Debt
Securities and the Indenture with respect to such Series, at any time, (a) by
delivering all outstanding Debt Securities of such Series to the Trustee for
cancellation and paying all sums payable by it under such Debt Securities and
the Indenture with respect to such Series or (b) after giving notice to the
Trustee of its intention to defease all of the Debt Securities of such Series,
by irrevocably depositing with the Trustee or a paying agent (other than the
Company or a Subsidiary) (i) in the case of any Debt Securities of any Series
denominated in U.S. dollars, cash or U.S. Government Obligations sufficient to
pay all principal of and interest on such Debt Securities and (ii) in the case
of any Debt Securities of any Series denominated in any currency other than
U.S. dollars, an amount of the Required Currency sufficient to pay all
principal of and interest on such Debt Securities; provided that if such
irrevocable deposit pursuant to (b) above is made on or prior to one year from
the Stated Maturity for payment of principal of such Series of Debt
Securities, the Company shall have delivered to the Trustee either an opinion
of counsel with no material qualifications or a favorable ruling of the
Internal Revenue Service, in either case to the effect that holders of such
Debt Securities (i) will not recognize income, gain or loss for Federal income
tax purposes as a result of such deposit (and the defeasance contemplated in
connection therewith) and (ii) will be subject to Federal income tax on the
same amounts and in the same manner and at the same time as would have been
the case if such deposit and defeasance had not occurred.
 
MODIFICATION AND WAIVER
 
  Modification and amendment of an Indenture will be permitted to be made by
the Company and the Trustee with the consent of the holders of not less than a
majority in principal amount of the outstanding Debt Securities of all Series
affected thereby (voting as a single class); provided that such modification
or amendment may not, without the consent of each holder of the Debt
Securities affected thereby, (i) change the Stated Maturity of the principal
of or any installment of interest with respect to the Debt Securities; (ii)
reduce the principal amount of, or the rate of interest on, the Debt
Securities; (iii) change the currency of payment of principal of or interest
on the Debt Securities; (iv) impair the right to institute suit for the
enforcement of any payment on or with respect to the Debt Securities; (v)
reduce the above-stated percentage of holders of the Debt Securities of any
Series necessary to modify or amend the Indenture relating to such Series;
(vi) modify the foregoing requirements or reduce the percentage of outstanding
Debt Securities necessary to waive any covenant or past default; (vii) in the
case of any Subordinated Indenture, modify the subordination provisions
thereof in a manner adverse to the holders of Subordinated Debt Securities of
any Series then outstanding; or (viii) in the case of any convertible Debt
Securities, adversely affect the right to convert the Debt Securities into
Common Stock in accordance with the provisions of the applicable Indenture.
Holders of not less than a majority in principal amount of the outstanding
Debt Securities of all Series affected thereby (voting as a single class) may
waive certain past
 
                                      10
<PAGE>
 
defaults and may waive compliance by the Company with any provision of the
Indenture relating to such Debt Securities (subject to the immediately
preceding sentence); provided that, (i) without the consent of each holder of
Debt Securities affected thereby, no waiver may be made of a default in the
payment of the principal of or interest on any Debt Security and (ii) only the
holders of a majority in principal amount of Debt Securities of a particular
Series may waive compliance with a provision of the Indenture relating to such
Series or the Debt Securities of such Series having applicability solely to
such Series.
 
EVENTS OF DEFAULT AND NOTICE THEREOF
 
  Unless otherwise provided in the applicable Prospectus Supplement, each
Indenture will provide that the following events are "Events of Default" with
respect to any Series of Debt Securities issued thereunder: (i) failure of the
Company to pay interest on any Debt Securities of such Series within 30 days
of when due or principal of any Debt Securities of such Series when due
(including any Sinking Fund installment); (ii) failure to perform any other
agreement contained in the Debt Securities of such Series or the Indenture
relating to such Series (other than an agreement relating solely to another
Series of Debt Securities) for 60 days after notice; (iii) certain events of
bankruptcy, insolvency or reorganization with respect to the Company.
Additional or different Events of Default, if any, applicable to the Series of
Debt Securities in respect of which this Prospectus is being delivered will be
specified in the applicable Prospectus Supplement.
 
  Each Indenture will provide that the Trustee under such Indenture shall,
within 75 days after the occurrence of any default (the term "default" to
include the events specified above without grace or notice) with respect to
any Series of Debt Securities actually known to it, give to the holders of
such Debt Securities notice of such default; provided that, except in the case
of a default in the payment of principal of or interest on any of the Debt
Securities of such Series or in the payment of any Sinking Fund installment,
the Trustee for such Series shall be protected in withholding such notice if
it in good faith determines that the withholding of such notice is in the
interest of the holders of such Debt Securities. Each Indenture will require
the Company to certify to the Trustee under such Indenture quarterly as to
whether any default exists.
 
  In case an Event of Default (other than an Event of Default resulting from
bankruptcy, insolvency or reorganization) with respect to any Series of Debt
Securities shall occur and be continuing, the Trustee for such Series or the
holders of at least 25% in aggregate principal amount of the Debt Securities
of such Series then outstanding, by notice in writing to the Company (and to
the Trustee for such Series if given by the holders of the Debt Securities of
such Series), will be entitled to declare all unpaid principal of and accrued
interest on such Debt Securities then outstanding to be due and payable
immediately. In case an Event of Default resulting from certain events of
bankruptcy, insolvency or reorganization shall occur, all unpaid principal of
and accrued interest on all Debt Securities of such Series then outstanding
shall be due and payable immediately without any declaration or other act on
the part of the Trustee for such Series or the holders of any Debt Securities
of such Series. Such acceleration may be annulled and past defaults (except,
unless theretofore cured, a default in payment of principal of or interest on
the Debt Securities of such Series) may be waived by the holders of a majority
in principal amount of the Debt Securities of such Series then outstanding
upon the conditions provided in the applicable Indenture.
 
  Each Indenture will provide that no holder of the Debt Securities of any
Series issued thereunder may pursue any remedy under such Indenture unless the
Trustee for such Series shall have failed to act after, among other things,
notice of an Event of Default and request by holders of at least 25% in
principal amount of the Debt Securities of such Series of which the Event of
Default has occurred and the offer to the Trustee for such Series of indemnity
satisfactory to it; provided, however, that such provision does not affect the
right to sue for enforcement of any overdue payment on such Debt Securities.
 
CONVERSION RIGHTS
 
  The terms and conditions, if any, upon which the Debt Securities of any
Series will be convertible into Common Stock will be set forth in the
Prospectus Supplement relating thereto. Such terms will include the conversion
price (or manner of calculation thereof), the conversion period, provisions as
to whether conversion will be at the option of the holders of such Series of
Debt Securities or at the option of the Company, the events
 
                                      11
<PAGE>
 
requiring an adjustment of the conversion price and provisions affecting
conversion in the event of the redemption of such Series of Debt Securities.
 
THE TRUSTEE
 
  The Trustee for each Series of Debt Securities will be Harris Trust and
Savings Bank. Each Indenture will contain certain limitations on a right of
the Trustee thereunder, as a creditor of the Company, to obtain payment of
claims in certain cases, or to realize on certain property received in respect
of any such claim as security or otherwise. The Trustee will be permitted to
engage in other transactions; provided, however, that if it acquires any
conflicting interest, it must eliminate such conflict or resign.
 
  The holders of a majority in principal amount of all outstanding Debt
Securities of a Series (or if more than one Series is affected thereby, of all
Series so affected, voting as a single class) will have the right to direct
the time, method and place of conducting any proceeding for exercising any
remedy or power available to the Trustee for such Series or all such Series so
affected.
 
  In case an Event of Default shall occur (and shall not be cured) under any
Indenture relating to a Series of Debt Securities and is known to the Trustee
for such Series, such Trustee shall exercise such of the rights and powers
vested in it by such Indenture and use the same degree of care and skill in
its exercise as a prudent person would exercise or use under the circumstances
in the conduct of his own affairs. Subject to such provisions, the Trustee
will not be under any obligation to exercise any of its rights or powers under
the applicable Indenture at the request of any of the holders of Debt
Securities unless they shall have offered to the Trustee security and
indemnity satisfactory to it.
 
GOVERNING LAW
 
  The Indenture and the Debt Securities will be governed by the laws of the
State of New York.
 
GLOBAL SECURITIES; BOOK-ENTRY SYSTEM
 
  The Debt Securities of any Series may be issued in whole or in part in the
form of one or more global securities ("Global Securities") that will be
deposited with, or on behalf of, a depository (the "Depository") identified in
the Prospectus Supplement relating to such Series. Global Securities, if any,
issued in the United States are expected to be deposited with The Depository
Trust Company ("DTC"), as Depository. Global Securities will be issued in
fully registered form and may be issued in either temporary or permanent form.
Unless and until it is exchanged in whole or in part for the individual Debt
Securities represented thereby, a Global Security may not be transferred
except as a whole by the Depository for such Global Security to a nominee of
such Depository or by a nominee of such Depository to such Depository or
another nominee of such Depository or by such Depository or any nominee of
such Depository to a successor Depository or any nominee of such successor.
 
  The specific terms of the depository arrangement with respect to any Series
of Debt Securities will be described in the Prospectus Supplement relating to
such Series. The Company expects that unless otherwise indicated in the
applicable Prospectus Supplement, the following provisions will apply to
depository arrangements.
 
  Upon the issuance of a Global Security, the Depository for such Global
Security or its nominee will credit on its book-entry registration and
transfer system the respective principal amounts of the individual Debt
Securities represented by such Global Security to the accounts of persons that
have accounts with such Depository ("Participants"). Such accounts will be
designated by the underwriters, dealers or agents with respect to such Debt
Securities or by the Company if such Debt Securities are offered directly by
the Company. Ownership of beneficial interests in such Global Security will be
limited to Participants or persons that may hold interests through
Participants.
 
                                      12
<PAGE>
 
  The Company expects that, pursuant to procedures established by DTC,
ownership of beneficial interests in any Global Security with respect to which
DTC is the Depository will be shown on, and the transfer of that ownership
will be effected only through, records maintained by DTC or its nominee (with
respect to beneficial interests of Participants) and records of Participants
(with respect to beneficial interests of persons who hold through
Participants). Neither the Company nor the Trustee will have any
responsibility or liability for any aspect of the records of DTC or for
maintaining, supervising or reviewing any records of DTC or any of its
Participants relating to beneficial ownership interests in the Debt
Securities. The laws of some states require that certain purchasers of
securities take physical delivery of such securities in definitive form. Such
limits and laws may impair the ability to own, pledge or transfer beneficial
interest in a Global Security.
 
  So long as the Depository for a Global Security or its nominee is the
registered owner of such Global Security, such Depository or such nominee, as
the case may be, will be considered the sole owner or holder of the Debt
Securities represented by such Global Security for all purposes under the
applicable Indenture. Except as described below or in the applicable
Prospectus Supplement, owners of beneficial interest in a Global Security will
not be entitled to have any of the individual Debt Securities represented by
such Global Security registered in their names, will not receive or be
entitled to receive physical delivery of any such Debt Securities in
definitive form and will not be considered the owners or holders thereof under
the applicable Indenture. Beneficial owners of Debt Securities evidenced by a
Global Security will not be considered the owners or holders thereof under the
applicable Indenture for any purpose, including with respect to the giving of
any direction, instructions or approvals to the Trustee thereunder.
Accordingly, each person owning a beneficial interest in a Global Security
with respect to which DTC is the Depository must rely on the procedures of DTC
and, if such person is not a Participant, on the procedures of the Participant
through which such person owns its interests, to exercise any rights of a
holder under the applicable Indenture. The Company understands that, under
existing industry practice, if it requests any action of holders or if an
owner of a beneficial interest in a Global Security desires to give or take
any action which a holder is entitled to give or take under the applicable
Indenture, DTC would authorize the Participants holding the relevant
beneficial interest to give or take such action, and such Participants would
authorize beneficial owners through such Participants to give or take such
actions or would otherwise act upon the instructions of beneficial owners
holding through them.
 
  Payments of principal of, and any interest on, individual Debt Securities
represented by a Global Security registered in the name of a Depository or its
nominee will be made to or at the direction of the Depository or its nominee,
as the case may be, as the registered owner of the Global Security under the
applicable Indenture. Under the terms of the applicable Indenture, the Company
and the Trustee may treat the persons in whose name Debt Securities, including
a Global Security, are registered as the owners thereof for the purpose of
receiving such payments. Consequently, neither the Company nor the Trustee has
or will have any responsibility or liability for the payment of such amounts
to beneficial owners of Debt Securities (including principal and interest).
The Company believes, however, that it is currently the policy of DTC to
immediately credit the accounts of relevant Participants with such payments,
in amounts proportionate to their respective holdings of beneficial interests
in the relevant Global Security as shown on the records of DTC or its nominee.
The Company also expects that payments by Participants to owners of beneficial
interests in such Global Security held through such Participants will be
governed by standing instructions and customary practices, as is the case with
securities held for the account of customers in bearer form or registered in
street name, and will be the responsibility of such Participants. Redemption
notices with respect to any Debt Securities represented by a Global Security
will be sent to the Depository or its nominee. If less than all of the Debt
Securities of any series are to be redeemed, the Company expects the
Depository to determine the amount of the interest of each Participant in such
Debt Securities to be redeemed to be determined by lot. None of the Company,
the Trustee, any Paying Agent or the Registrar for such Debt Securities will
have any responsibility or liability for any aspect of the records relating to
or payments made on account of beneficial ownership interests in the Global
Security for such Debt Securities or for maintaining any records with respect
thereto.
 
  Neither the Company nor the Trustee will be liable for any delay by the
holders of a Global Security or the Depository in identifying the beneficial
owners of Debt Securities and the Company and the Trustee may
 
                                      13
<PAGE>
 
conclusively rely on, and will be protected in relying on, instructions from
the holder of a Global Security or the Depository for all purposes. The rules
applicable to DTC and its Participants are on file with the Securities and
Exchange Commission.
 
  If a Depository for any Debt Securities is at any time unwilling, unable or
ineligible to continue as depository and a successor depository is not
appointed by the Company within 90 days, the Company will issue individual
Debt Securities in exchange for the Global Security representing such Debt
Securities. In addition, the Company may at any time and in its sole
discretion, subject to any limitations described in the Prospectus Supplement
relating to such Debt Securities, determine not to have any of such Debt
Securities represented by one or more Global Securities and in such event will
issue individual Debt Securities in exchange for the Global Security or
Securities representing such Debt Securities. Individual Debt Securities so
issued will be issued in denominations of $1,000 and integral multiples
thereof.
 
                                      14
<PAGE>
 
                       DESCRIPTION OF EQUITY SECURITIES
 
GENERAL
 
  The Restated Certificate of Incorporation of the Company (the "Certificate
of Incorporation") provides that the aggregate number of shares of all classes
of stock that the Company has authority to issue is 302,700,000 shares,
consisting of 250,000,000 shares of Common Stock, 50,000,000 shares of
Preferred Stock and 2,700,000 shares of Class A common stock, par value 33
1/3c per share ("Class A Common Stock").
 
  As of September 30, 1997, the issued and outstanding Common Stock, Class A
Common Stock and Preferred Stock of the Company was as follows:
 
<TABLE>
<CAPTION>
                          CLASS OF STOCK                              SHARES
                          --------------                              ------
<S>                                                                 <C>
Common Stock....................................................... 105,685,179
Class A Common Stock...............................................     369,763
Preferred Stock:
  $1.19 Cumulative Convertible Preferred Stock, Series A ("Series A
   Preferred Stock")...............................................      58,001
  $1.83 Cumulative Convertible Preferred Stock, Series B ("Series B
   Preferred Stock")...............................................      69,989
  $5.00 Cumulative Convertible Preferred Stock, Series C ("Series C
   Preferred Stock")...............................................      29,840
  $2.125 Cumulative Preferred Stock, Series H ("Series H Preferred
   Stock").........................................................   8,000,000
</TABLE>
 
  All issued and outstanding shares are fully-paid and non-assessable.
 
PREFERRED STOCK
 
 Terms
 
  The following description of the Preferred Stock summarizes certain general
terms and provisions of each series of Preferred Stock to which any Prospectus
Supplement may relate. Certain other terms of a particular series of Preferred
Stock will be summarized in the Prospectus Supplement relating to such series.
The summaries of the terms of the Preferred Stock below and in any Prospectus
Supplement do not, and will not, purport to be complete and are subject to,
and qualified in their entirety by reference to, the Company's Certificate of
Incorporation and the certificate of designation establishing a series of
Preferred Stock (each, a "Certificate of Designation"), each of which will be
filed with the Commission at or prior to the time of the sale of such series
of Preferred Stock.
 
  The Board of Directors is authorized to provide for issuance of the
Preferred Stock of the Company from time to time, in one or more series, and
to fix the dividend rate, conversion or exchange rights, voting rights, terms
of redemption, redemption price or prices, liquidation preferences and
qualifications, limitations and restrictions thereof with respect to each
series.
 
  An applicable Prospectus Supplement will set forth or describe other
specific terms regarding each series of Preferred Stock offered thereby,
including:
 
    1. the title and stated value of such Preferred Stock;
 
    2. the number of shares of such Preferred Stock offered, the liquidation
  preference per share and the initial offering price of such Preferred
  Stock;
 
    3. the dividend rate, period and/or payment date, or method of
  calculation thereof, applicable to such Preferred Stock;
 
    4. the date from which dividends on such Preferred Stock shall
  accumulate, if applicable;
 
    5. the provision for a sinking fund, if any, for such Preferred Stock;
 
    6. the provision for redemption, if applicable, of such Preferred Stock;
 
                                      15
<PAGE>
 
    7. any listing of such Preferred Stock on any securities exchange;
 
    8. the terms and conditions, if applicable, upon which such Preferred
  Stock will be convertible into Common Stock or exchangeable for Debt
  Securities, including the conversion price or exchange rate, as the case
  may be (or the manner of calculation thereof);
 
    9. a discussion of Federal tax considerations applicable to such
  Preferred Stock;
 
    10. the relative ranking and preference of such Preferred Stock as to
  dividend rights and rights upon liquidation, dissolution or winding up of
  the affairs of the Company;
 
    11. any limitations on issuance of any series of Preferred Stock ranking
  senior to or on a parity with such series or Preferred Stock as to dividend
  rights and rights upon liquidation, dissolution or winding up of the
  affairs of the Company;
 
    12. the voting powers, if any, of such Preferred Stock, in addition to
  those set forth below; and
 
    13. any other specific terms, preferences, rights, limitations or
  restrictions of such Preferred Stock.
 
 Dividends
 
  The holders of the Preferred Stock of each series shall be entitled to
receive, when, as and if declared by the Board of Directors of the Company,
out of the funds of the Company legally available therefor, cash dividends at
the annual rate and on such dates as shall be set forth in the Prospectus
Supplement relating to such series. Each such dividend shall be paid to the
holders of record of shares of such series on such record date as shall be
fixed by the Board of Directors of the Company.
 
  If dividends are not paid in full or declared in full and a sum set apart
for the payment thereof upon the Preferred Stock of a series and any other
Preferred Stock ranking on a parity as to dividends with the Preferred Stock
of such series, all dividends declared upon shares of Preferred Stock of such
series and any other Preferred Stock ranking on a parity as to dividends shall
be declared pro rata so that in all cases the amount of dividends declared per
share on the Preferred Stock of such series and any other Preferred Stock
ranking on a parity as to dividends shall be in the same proportion as the
amount of dividends that would be paid on all shares of Preferred Stock of
such series and such other parity Preferred Stock if all such dividends
(including dividends accrued or in arrears) were paid in full. Except as
provided in the preceding sentence, unless full cumulative dividends on the
Preferred Stock of a series have been paid or declared in full and a sum set
aside for the payment thereof, no dividends shall be declared or paid or set
aside for payment or other distribution made upon the Company's Common Stock,
Class A Common Stock or any other class or series of capital stock of the
Company ranking junior to or on a parity with the Preferred Stock of the
applicable series as to dividends or liquidation rights, nor shall any Common
Stock, Class A Common Stock or any other class or series of capital stock of
the Company ranking junior to or on a parity with the Preferred Stock of such
series as to dividends or liquidation rights be redeemed, purchased or
otherwise acquired for any consideration (or any payment made to or available
for a sinking fund for the redemption of any shares of such stock) by the
Company or any subsidiary of the Company (except by conversion into or
exchange for stock of the Company ranking junior to the Preferred Stock of the
applicable series as to dividends and liquidation rights). Unless otherwise
stated in the applicable Prospectus Supplement, no interest, or sum of money
in lieu of interest, will be payable in respect of any dividend payment or
payments on Preferred Stock of any series which may be in arrears.
 
  Dividends payable on the Preferred Stock of a Series for any period less
than a full quarterly dividend period shall be computed on the basis of a 360-
day year of twelve 30-day months and the actual number of days elapsed in the
period for which payable.
 
 Voting Rights
 
  The holders of the Preferred Stock shall not, except as required by law or
as set forth in the applicable Prospectus Supplement, have any right or power
to vote on any question or in any proceeding or to be
 
                                      16
<PAGE>
 
represented at, or to receive notice of, any meeting of stockholders. On any
matters on which the holders of the Preferred Stock shall be entitled to vote,
they shall be entitled to one vote for each share held.
 
  Unless otherwise stated in the applicable Prospectus Supplement, in case at
any time the equivalent of six or more full quarterly dividends (whether
consecutive or not) on any series of Preferred Stock shall be in arrears, then
during the period (the "Voting Period") commencing with such time and ending
with the time when all arrearages in dividends on the Preferred Stock of all
series shall have been paid and the full dividend on the Preferred Stock of
all series for the then current quarterly dividend period shall have been paid
or declared and set apart for payment, at any meeting of the stockholders of
the Company held for the election of directors during the Voting Period, the
holders of a majority of the outstanding shares of Preferred Stock of all
series represented in person or by proxy at said meeting shall be entitled, as
a class, to the exclusion of the holders of all other classes of stock of the
Company, to elect two directors of the Company, each share of Preferred Stock
entitling the holder thereof to one vote.
 
  Any director who shall have been elected by holders of Preferred Stock, or
by any director so elected as herein contemplated, may be removed at any time
during a Voting Period, either for or without cause, by, and only by, the
affirmative votes of the holders of record of a majority of the outstanding
shares of Preferred Stock of all series given at a special meeting of such
stockholders called for the purpose, and any vacancy thereby created may be
filled during such Voting Period by the holders of Preferred Stock of all
series, present in person or represented by proxy at such meeting. Any
director elected by holders of Preferred Stock, or by any director so elected
as herein contemplated, who dies, resigns or otherwise ceases to be a director
shall, except as otherwise provided in the preceding sentence, be replaced by
the remaining director theretofore elected by the holders of Preferred Stock.
At the end of the Voting Period, the holders of Preferred Stock of all series
shall be automatically divested of all voting power vested in them under this
provision but subject always to the subsequent vesting of voting power in the
holders of Preferred Stock in the event of any similar cumulated arrearage in
payment of quarterly dividends occurring thereafter. The term of all directors
elected pursuant to this provision shall in all events expire at the end of
the Voting Period.
 
  The approval of the holders of at least two-thirds of the then outstanding
shares of Preferred Stock of a series will be required to amend the applicable
Certificate of Designation to adversely change the preferences, special rights
or powers of the Preferred Stock of such series or to authorize, create or
increase the authorized amount of any class or series of capital stock of the
Company ranking prior to the Preferred Stock of such series either as to
dividend or liquidation rights; provided that the creation or issuance of any
class or series of capital stock of the Company not ranking prior to the
Preferred Stock of a series as to dividend or liquidation rights shall not
require the consent of the holders of the Preferred Stock of such series.
 
 Ranking
 
  The Preferred Stock to which any Prospectus Supplement may relate will rank
pari passu with the outstanding shares of Series A Preferred Stock, Series B
Preferred Stock, Series C Preferred Stock and Series H Preferred Stock of the
Company with respect to dividend rights and liquidation preference. The
Preferred Stock will rank prior to the Company's Common Stock and Class A
Common Stock. Without the requisite vote of holders of the Preferred Stock, as
described above under "--Voting Rights," no class or series of capital stock
can be created ranking senior to the Preferred Stock as to dividend rights or
liquidation preference.
 
 Liquidation Rights
 
  In the event of any liquidation, dissolution or winding up of the Company,
the holders of shares of the Preferred Stock of each series are entitled to
receive out of assets of the Company available for distribution to
stockholders, before any distribution of assets is made to holders of Common
Stock, Class A Common Stock or any other class or series of capital stock of
the Company (including any Preferred Stock) which is junior as to liquidation
rights to the Preferred Stock of such series, liquidating distributions in the
amount set forth in the applicable Prospectus Supplement, plus dividends
accrued and accumulated but unpaid to the date of such
 
                                      17
<PAGE>
 
distribution. If, upon any liquidation, dissolution or winding up of the
Company, the amounts payable with respect to the Preferred Stock of such
series and any other Preferred Stock of the Company ranking as to any such
distribution on a parity with the Preferred Stock of such series are not paid
in full, the holders of the Preferred Stock of such series and of such other
Preferred Stock of the Company will share ratably in any such distribution of
assets in proportion to the full respective preferential amounts to which they
are entitled. After payment of the full amount of the liquidating distribution
to which they are entitled, the holders of shares of the Preferred Stock will
not be entitled to any further participation in any distribution of assets by
the Company. Neither a consolidation or merger of the Company with another
corporation nor a sale or transfer of all or part of the Company's assets for
cash or securities shall be considered a liquidation, dissolution or winding
up of the Company.
 
 Redemption Provisions
 
  The Preferred Stock of each series will have such optional or mandatory
redemption terms, if any, as shall be set forth in the applicable Prospectus
Supplement.
 
 Conversion and Exchange Rights
 
  The terms and conditions, if any, upon which any series of Preferred Stock
is convertible into Common Stock or exchangeable into Debt Securities will be
set forth in the applicable Prospectus Supplement relating to such series of
Preferred Stock. Such terms will include (i) in the case such series of
Preferred Stock is convertible into Common Stock, (A) the number of shares of
Common Stock into which shares of such series of Preferred Stock are
convertible, (B) the conversion price (or manner of calculation thereof), (C)
the conversion period, (D) provisions as to whether conversion will be at the
option of the holders of such series of Preferred Stock or at the option of
the Company, (E) the events requiring an adjustment of the conversion price
and (F) provisions affecting conversion in the event of the redemption of such
series of Preferred Stock and (ii) in the case such series of Preferred Stock
is exchangeable into Debt Securities, (A) the principal amount of Debt
Securities into which shares of such series of Preferred Stock are
exchangeable, (B) the exchange period and (C) provisions as to whether
exchange will be at the option of the holders of such series of Preferred
Stock or at the option of the Company.
 
 Miscellaneous
 
  The Preferred Stock will have no preemptive rights. All of the Preferred
Stock, upon payment in full therefor, will be fully paid and nonassessable.
 
COMMON STOCK AND CLASS A COMMON STOCK
 
 Dividends
 
  Subject to the preferential rights of the holders of Preferred Stock, all
issued and outstanding shares of Common Stock are entitled to participate
equally in dividends when, as and if declared by the Board of Directors of the
Company out of funds legally available for such purposes. The Directors of the
Company may declare and pay dividends upon the shares of its capital stock
either out of surplus or if there is no surplus, out of net profits for the
fiscal year in which the dividend is declared and/or the preceding fiscal
year, subject to the restrictions contained in certain agreements.
 
  The Board of Directors may fix, in advance, a date as the record date for
purposes of determining stockholders entitled to receive dividends. Such date
may not be more than 60 days prior to the payment of such dividends; however,
if no record date is fixed by the Board of Directors, the record date will be
at the close of business on the day which the Board of Directors adopts the
resolution relating to the dividend.
 
                                      18
<PAGE>
 
 Meetings of Stockholders
 
  A meeting of the stockholders of the Company for the election of Directors
and for the transaction of any other business of the Company as may lawfully
come before the meeting is held annually at a date, time and place designated
by the Board of Directors.
 
  In addition, a special meeting of the stockholders of the Company may be
called by the Board of Directors, the Chairman of the Board or the President
at any time. The Certificate of Incorporation provides that any action
required or permitted to be taken at a meeting of stockholders may be taken
only at a meeting of stockholders.
 
 Voting Rights
 
  A majority of the voting power of all outstanding shares of the Company
entitled to vote at a meeting of stockholders constitutes a quorum. Except as
otherwise provided by law or by the Certificate of Incorporation or the By-
laws of the Company, a resolution can be adopted at a meeting provided a
quorum is present.
 
  The holders of Common Stock are entitled to one vote per share on all
matters upon which stockholders generally have the right to vote, while
holders of Class A Common Stock are entitled to 100 votes per share on all
matters on which such holders have the right to vote. All shares presently
outstanding are fully paid and nonassessable.
 
  The shares of Common Stock do not have cumulative voting rights. At every
meeting of the stockholders called for the election of directors, the holders
of Common Stock, voting as a class with the holders of Series A Preferred
Stock, Series B Preferred Stock, Series C Preferred Stock and any other Series
of Preferred Stock generally entitled to vote therefor (collectively, the
"Voting Preferred"), shall be entitled to elect one-quarter of the number of
directors to be elected at such meeting, and if one-quarter of such number of
directors is not a whole number, then the holders of Common Stock, voting as a
class with the holders of Voting Preferred Stock, shall be entitled to elect
the next higher whole number of directors to be elected at such meeting, and
the holders of Class A Common Stock shall have no voting rights with respect
to the election of such directors. The holders of Class A Common Stock, Common
Stock and Voting Preferred Stock, voting as a single class, shall be entitled
to elect the remaining directors to be elected at such meeting. If, during the
interval between annual meetings of stockholders for the election of
directors, the number of directors who have been elected by either the holders
of Common Stock voting as a class with the holders of Voting Preferred Stock
or by the holders of Class A Common Stock, Common Stock and Voting Preferred
Stock, shall, by reason of resignation, death, retirement, disqualification or
removal, be reduced, the vacancy or vacancies in the directors so created may
be filled by a majority vote of the remaining directors then in office, even
if less than a quorum, or by a sole remaining director. Any director elected
by the remaining directors then in office to fill any vacancy in the
directorships designated by the holders of Common Stock and Voting Preferred
Stock may be removed from office by vote of the holders of a majority of the
shares of Common Stock voting as a class with the holders of Voting Preferred
Stock.
 
  Notice of a stockholders' meeting, stating the place, date, time and the
purpose thereof, must be delivered either personally or by mail to each
stockholder at his address as it appears on the books of the Company unless
otherwise provided by law or the Certificate of Incorporation at least 10 days
but not more than 50 days prior to the date set for the meeting. Stockholders
may exercise their voting rights through proxies as provided in the By-laws.
 
 Provisions Relating to Control of the Company
 
  The Class A Common Stock carries certain rights, and the Certificate of
Incorporation of the Company contains certain provisions, which affect the
control of the Company, and are described below.
 
 (i) Class A Common Stock
 
  The Class A Common Stock is non-transferable. Each share of Class A Common
Stock carries the right to exercise 100 votes and may be converted into one
share of Common Stock. The Board of Directors may declare
 
                                      19
<PAGE>
 
and pay dividends in respect of the Class A Common Stock provided that a
greater dividend is, at the same time, declared and paid in respect of the
Common Stock.
 
  As conversions into shares of Common Stock carrying only one vote per share
occur and the amount of outstanding Class A Common Stock is accordingly
reduced, the voting power attaching to the Class A Common Stock will become
consolidated in the hands of those who continue to hold such stock and
effectively strengthen their ability to influence the composition of the Board
of Directors (subject always to the right of the holders of Common Stock and
Voting Preferred Stock entitled to vote to elect one-quarter of the total
number of directors).
 
 (ii) Board of Directors
 
  (a) The Certificate of Incorporation of the Company provides for a Board of
Directors consisting of a minimum of three and a maximum of eighteen directors
to be divided into three classes (with each of the three classes required to
be as nearly equal as possible) serving staggered three-year terms. The effect
of this provision is that, at each annual meeting of the Company,
approximately one-third of the Board of Directors is elected to succeed those
whose terms expire. The total number of directors and the number of directors
constituting each class may be varied, from time to time, by the Board of
Directors within the authorized limits.
 
  (b) Notwithstanding that the maximum of directors is established at
eighteen, the rights of any holders of Preferred Stock or any other class or
series of stock (other than Common Stock) to elect a specified number of
directors, are governed by the terms of the Certificate of Incorporation
applicable thereto, and such directors shall not be classified as described
above unless so provided.
 
  (c) The directors are also empowered to fill casual vacancies occurring on
the Board. Any director so appointed by the Board would hold office for the
unexpired portion of the term of the director whose place he or she had taken.
Where the Board appoints a director to fill a newly created directorship
resulting from an increase in the number of directors, that director would
hold office until the next election of the class for which he or she was
chosen. If the size of the Board was increased, the additional director or
directors would be apportioned among the three classes to make all classes as
nearly equal as possible.
 
  (d) No person (except a person nominated by or on behalf of the Board) is
eligible for election as a director at any annual or special meeting of
stockholders unless a written request that such person's name be placed in
nomination is received from a stockholder of record by the Secretary of the
Company not less than 30 days prior to the date fixed for the meeting,
together with the written consent of such person to serve as a director.
 
 (iii) Meetings of Stockholders
 
  Stockholder action may be taken only at a stockholders' meeting. Coastal's
stockholders do not have the power to call a special meeting and it may
therefore be more difficult for stockholders to take action opposed by the
Board of Directors. This may have the effect of deterring persons from seeking
to acquire substantial stock positions in or control of the Company, including
an attempt to acquire control of the Company made in response to any attempt
by the Company to acquire securities of, or control of, another corporation.
 
 (iv) Business Combinations
 
  The approval of the holders of 85% of the voting power of the outstanding
shares of stock of the Company is required, in certain circumstances, for the
adoption or authorization of a business combination with any controlling
company (being an entity which either owns, or is controlled by any entity
which owns, 20% of the voting power of the outstanding shares of Coastal's
stock). Delaware law provides that, unless the certificate of incorporation
specifies otherwise, the votes of the holders of a majority of the outstanding
voting stock are sufficient to approve a business combination.
 
  A proposed business combination will not have to meet the 85% vote
requirement where certain fair price and other procedural requirements are
satisfied. These requirements are designed to ensure that the cash or
 
                                      20
<PAGE>
 
market value of any other consideration to be received by Coastal's
stockholders in such business combination is fair, to preserve the rights of
the public stockholders of Coastal by ensuring that appropriate representation
on the Board of Directors of the Company will be maintained, to keep public
stockholders fully informed as to the advisability of the proposed business
combination and to ensure that there is no major change in the business or
capital structure of the Company and no reduction in the rate of dividends
payable on the Company's stock without the approval of the Board of Directors.
 
 Pre-emptive Rights
 
  Neither stockholders nor any other person have any pre-emptive subscription
rights.
 
 Liquidation, Dissolution and Reorganization
 
  All shares of Common Stock and Class A Common Stock rank equally upon
liquidation or dissolution of the Company, after payment of all debts and
expenses and satisfaction of the interests of the holders of any shares of
Preferred Stock of the Company then outstanding.
 
  The Certificate of Incorporation provides that if a majority in number
representing three-fourths in value of the creditors or class or creditors,
and/or of the stockholders or class of stockholders of the Company, as the
case may be, agree to any compromise or arrangement and to any reorganization
of the Company at a meeting properly called by a Delaware court, such action,
if sanctioned by the court will be binding on all the creditors or class of
creditors, and/or on all the stockholders or class of stockholders, of the
Company as the case may be and also on the Company.
 
 Transferability of Shares of Common Stock and Class A Common Stock
 
  There are no restrictions in the Certificate of Incorporation or By-Laws of
the Company on the transferability of shares of Common Stock. Shares of Class
A Common Stock are not transferable and upon any attempted transfer or upon
death of the holder thereof are automatically converted into shares of Common
Stock.
 
                     DESCRIPTION OF COMMON STOCK WARRANTS
 
  The Company may issue Common Stock Warrants which may be issued
independently or together with any Securities offered by any Prospectus
Supplement and may be attached to or separate from such Securities. Each
series of Common Stock Warrants will be issued under a separate warrant
agreement (a "Warrant Agreement") to be entered into between the Company and a
bank or trust company, as Warrant Agent (the "Warrant Agent"), all as set
forth in the applicable Prospectus Supplement. The Warrant Agent will act
solely as an agent of the Company in connection with the certificates
representing the Common Stock Warrants (the "Common Stock Warrant
Certificates") and will not assume any obligation or relationship of agency or
trust for or with any holders of Common Stock Warrant Certificates or
beneficial owners of Common Stock Warrants. The Warrant Agreement, including
the form of Common Stock Warrant Certificate representing each series of
Common Stock Warrants, will be filed with the Commission at or prior to the
time of sale of any such series of Common Stock Warrants. The following
summaries of certain provisions of the Warrant Agreement and Common Stock
Warrant Certificate do not purport to be complete and are subject to, and are
qualified in their entirety by reference to, all the provisions of the Warrant
Agreement relating to, and the Common Stock Warrant Certificate representing,
a Series of Common Stock Warrants.
 
GENERAL
 
  An applicable Prospectus Supplement will set forth and describe other
specific terms regarding each series of Common Stock Warrants offered hereby,
including:
 
    1. the offering price;
 
                                      21
<PAGE>
 
    2. the number of shares of Common Stock purchasable upon exercise of each
  such Common Stock Warrant and the price at which such number of shares of
  Common Stock may be purchased upon such exercise;
 
    3. the date on which the right to exercise such Common Stock Warrants
  shall commence and the date on which such right shall expire (the
  "Expiration Date"); and
 
    4. any other terms of such Common Stock Warrants (and the applicable
  Prospectus Supplement may state that any of the terms set forth herein are
  inapplicable to such series).
 
  Common Stock Warrants for the purchase of Common Stock will be offered and
exercisable for U.S. dollars only and will be in registered form only.
 
  Common Stock Warrant Certificates may be exchanged for new Common Stock
Warrant Certificates of different denominations, may be presented for
registration or transfer, and may be exercised at the corporate trust office
of the Warrant Agent or any other office indicated in the applicable
Prospectus Supplement. Prior to the exercise of any Common Stock Warrants,
holders of such Common Stock Warrants will not have any rights of holders of
the Common Stock purchasable upon such exercise, including the right to
receive payments of dividends, if any, on the Common Stock purchasable upon
such exercise or to exercise any applicable right to vote.
 
EXERCISE OF COMMON STOCK WARRANTS
 
  Each Common Stock Warrant will entitle the holder thereof to purchase such
shares of Common Stock at such exercise price as shall in each case be set
forth in, or calculable from, the Prospectus Supplement relating to the
offered Common Stock Warrants. After the close of business on the Expiration
Date (or such later date to which such Expiration Date may be extended by the
Company) unexercised Common Stock Warrants will become void.
 
  Common Stock Warrants may be exercised by delivering to the Warrant Agent
payment as provided in the applicable Prospectus Supplement of the amount
required to purchase the Common Stock purchasable upon such exercise, together
with certain information set forth on the reverse side of the Common Stock
Warrant Certificate. Upon receipt of such payment and the Common Stock Warrant
Certificate properly completed and duly executed at the corporate trust office
of the Warrant Agent or any other office indicated in the applicable
Prospectus Supplement, the Company will, as soon as practicable, issue and
deliver the Common Stock purchasable upon such exercise. If fewer than all of
the Common Stock Warrants represented by such Common Stock Warrant Certificate
are exercised, a new Common Stock Warrant Certificate will be issued for the
remaining amount of Common Stock Warrants.
 
AMENDMENTS AND SUPPLEMENTS TO WARRANT AGREEMENT
 
  The Warrant Agreement for a series of Common Stock Warrants may be amended
or supplemented without the consent of the holders of the Common Stock
Warrants issued thereunder to effect changes that are not inconsistent with
the provisions of the Common Stock Warrants and that do not adversely affect
the interests of the holders of the Common Stock Warrants.
 
COMMON STOCK WARRANT ADJUSTMENTS
 
  Unless otherwise indicated in the applicable Prospectus Supplement, the
exercise price of, and the number of shares of Common Stock covered by, a
Common Stock Warrant are subject to adjustment in certain events, including:
(i) the issuance of Common Stock as a dividend or distribution on the Common
Stock; (ii) subdivisions and combinations of the Common Stock; (iii) the
issuance to all holders of Common Stock of
 
                                      22
<PAGE>
 
certain rights or warrants entitling them to subscribe for or purchase Common
Stock, at less than the Current Market Value (as defined in the Warrant
Agreement for such series of Common Stock Warrants); and (iv) the distribution
to all holders of Common Stock of evidences of indebtedness or assets of the
Company (excluding certain cash dividends and distributions described below).
 
  No adjustment in the exercise price of, and the number of shares of Common
Stock covered by, a Common Stock Warrant will be made for regular quarterly or
other periodic or recurring cash dividends or distributions or for cash
dividends or distributions to the extent paid from retained earnings. No
adjustment will be required unless such adjustment would require a change of
at least one percent in the exercise price and exercise rate then in effect;
provided that any such adjustment not so made will be carried forward and
taken into account in any subsequent adjustment; provided further, that any
such adjustment not so made shall be made no later than three years after the
occurrence of the event requiring such adjustment to be made or carried
forward. Except as stated above, the exercise price of, and the number of
shares of Common Stock covered by, a Common Stock Warrant will not be adjusted
for the issuance of Common Stock or any securities convertible into or
exchangeable for Common Stock, or securities carrying the right to purchase
any of the foregoing.
 
  In the case of (i) a reclassification or change of the Common Stock, (ii) a
consolidation or merger involving the Company or (iii) a sale or conveyance to
another corporation of the property and assets of the Company as an entirety
or substantially as an entirety, in each case as a result of which holders of
the Company's Common Stock shall be entitled to receive stock, securities,
other property or assets (including cash) with respect to or in exchange for
such Common Stock, the holders of the Common Stock Warrants then outstanding
will be entitled thereafter to convert such Common Stock Warrants into the
kind and amount of shares of stock and other securities or property which they
would have received upon such reclassification, change, consolidation, merger,
sale or conveyance had such Common Stock Warrants been exercised immediately
prior to such reclassification, change, consolidation, merger, sale or
conveyance.
 
                             PLAN OF DISTRIBUTION
 
  The Company may sell Securities in any of three ways: (i) through
underwriters or dealers; (ii) directly to a limited number of institutional
purchasers or to a single purchaser; or (iii) through agents. Any such dealer
or agent, in addition to any underwriter, may be deemed to be an underwriter
within the meaning of the Securities Act. The terms of the offering of the
Securities with respect to which this Prospectus is being delivered will be
set forth in the applicable Prospectus Supplement, including the name or names
of any underwriters, dealers or agents, the purchase price of such Securities
and the proceeds to the Company from such sale, any underwriting discounts and
other items constituting underwriters' compensation, the public offering price
and any discounts or concessions which may be allowed or reallowed or paid to
dealers and any securities exchanges on which the Securities may be listed.
 
  If underwriters are used in the sale of Securities, such Securities will be
acquired by the underwriters for their own account and may be resold from time
to time in one or more transactions, including negotiated transactions, at a
fixed public offering price or at varying prices determined at the time of
sale. The Securities may be offered to the public either through underwriting
syndicates represented by managing underwriters or directly by one or more
underwriters acting alone. Unless otherwise set forth in the applicable
Prospectus Supplement, the obligations of the underwriters to purchase the
Securities described in the applicable Prospectus Supplement will be subject
to certain conditions precedent, and the underwriters will be obligated to
purchase all such Securities if any are so purchased by them. Any public
offering price and any discounts or concessions allowed or reallowed or paid
to dealers may be changed from time to time.
 
  The Securities may be sold directly by the Company or through agents
designated by the Company from time to time. Any agents involved in the offer
or sale of the Securities in respect of which this Prospectus is being
delivered, and any commissions payable by the Company to such agents, will be
set forth in the applicable
 
                                      23
<PAGE>
 
Prospectus Supplement. Unless otherwise indicated in the applicable Prospectus
Supplement, any such agent will be acting on a best efforts basis for the
period of its appointment.
 
  If dealers are utilized in the sale of any Securities, the Company will sell
the Securities to the dealers, as principals. Any dealer may resell the
Securities to the public at varying prices to be determined by the dealer at
the time of resale. The name of any dealer and the terms of the transaction
will be set forth in the Prospectus Supplement with respect to the Securities
being offered.
 
  If so indicated in the applicable Prospectus Supplement, the Company will
authorize agents, underwriters or dealers to solicit offers by certain
specified institutions to purchase the Securities to which this Prospectus and
the applicable Prospectus Supplement relates from the Company at the public
offering price set forth in the applicable Prospectus Supplement, plus, if
applicable, accrued interest, pursuant to delayed delivery contracts providing
for payment and delivery on a specified date in the future. Such contracts
will be subject only to those conditions set forth in the applicable
Prospectus Supplement, and the applicable Prospectus Supplement will set forth
the commission payable for solicitation of such contracts.
 
  Underwriters will not be obligated to make a market in any Securities. The
Company cannot predict the activity of trading in, or liquidity of, any
Securities.
 
  Agents, dealers and underwriters may be entitled, under agreements entered
into with the Company, to indemnification by the Company against certain civil
liabilities, including liabilities under the Securities Act, or to
contribution by the Company to payments they may be required to make in
respect thereof. Agents, dealers and underwriters may be customers of, engage
in transactions with, or perform services for, the Company in the ordinary
course of business.
 
                                 LEGAL MATTERS
 
  Certain legal matters in connection with the Securities offered hereby will
be passed upon for the Company by Austin M. O'Toole, Esq., Senior Vice
President and Secretary of Coastal, and for any underwriters, agents and
dealers by Cahill Gordon & Reindel (a partnership including a professional
corporation), New York, New York. As of December 1, 1997, Mr. O'Toole
beneficially owned approximately 21,578 shares of Common Stock and 554 shares
of Class A Common Stock of Coastal, including exercisable stock options.
 
                                    EXPERTS
 
  The annual consolidated financial statements of the Company incorporated in
this Prospectus by reference from the 1996 Annual Report on Form 10-K have
been audited by Deloitte & Touche LLP, independent auditors, as stated in
their report, which is incorporated herein by reference, and have been so
incorporated in reliance upon the report of such firm given upon their
authority as experts in accounting and auditing.
 
                                      24
<PAGE>
 
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
 
 No dealer, salesman or other person has been authorized to give any
information or to make any representation not contained in this Prospectus
and, if given or made, such information or representation must not be relied
upon as having been authorized by the Company, by any underwriters, agents or
dealers or by any other person. This Prospectus does not constitute an offer
to sell, or a solicitation of an offer to buy, any of the securities offered
hereby to any person or by anyone in any jurisdiction in which such offer or
solicitation may not lawfully be made. Neither the delivery of this Prospectus
nor any sale made hereunder shall, under any circumstances, create any
implication that there had been no change in the affairs of the Company since
the date hereof.
 
                               -----------------
 
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                                                           PAGE
                                                                           ----
<S>                                                                        <C>
Available Information.....................................................   2
Incorporation of Certain Documents by Reference...........................   2
The Company...............................................................   3
Use of Proceeds...........................................................   3
Ratio of Earnings to Fixed Charges and Earnings to Combined Fixed Charges
 and Preferred Stock Dividends............................................   3
Description of Debt Securities............................................   3
Description of Equity Securities..........................................  15
Description of Common Stock Warrants......................................  21
Plan of Distribution......................................................  23
Legal Matters.............................................................  24
Experts...................................................................  24
</TABLE>
 
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------

- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
 
                [LOGO OF THE COASTAL CORPORATION APPEARS HERE]
 
 
                                  THE COASTAL
                                  CORPORATION
 
                                DEBT SECURITIES
                                PREFERRED STOCK
                                 COMMON STOCK
                             COMMON STOCK WARRANTS
 
                               -----------------
 
                                  PROSPECTUS
 
                               -----------------
 
 
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
<PAGE>
 
                PART II. INFORMATION NOT REQUIRED IN PROSPECTUS
 
ITEM 14. OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION.
 
  The expenses, other than underwriting discounts and commissions, in
connection with the offering are as follows (all amounts except for the
Securities and Exchange Commission filing fee are estimated):
 
<TABLE>
      <S>                                                              <C>
      Securities and Exchange Commission filing fee................... $118,000
      Printing and engraving expenses.................................   75,000
      Legal fees and expenses.........................................   25,000
      Accounting fees and expenses....................................   50,000
      Blue sky qualification fees and expenses........................   50,000
      Miscellaneous...................................................   22,000
                                                                       --------
          Total....................................................... $340,000
                                                                       ========
</TABLE>
 
ITEM 15. INDEMNIFICATION OF DIRECTORS AND OFFICERS.
 
  Section 145 of the General Corporation Law of the State of Delaware grants
each corporation organized thereunder, such as the Registrant, the power to
indemnify directors and officers under certain circumstances. Article FIFTH of
the Registrant's Certificate of Incorporation and Article IX of the
Registrant's By-laws provide for indemnification of directors and officers to
the fullest extent permitted by law.
 
  An Indemnity Agreement was approved on May 27, 1981, at the annual meeting
of the holders of the Common Stock and Preferred Stock of Coastal and is
incorporated herein by reference to the definitive Proxy Statement of Coastal
(Exhibit A) dated April 15, 1981. In April of 1988, the Board of Directors of
Coastal approved a revised and updated Indemnity Agreement which is
incorporated herein by reference to the 1995 Annual Report (Exhibit 28).
 
ITEM 16. EXHIBITS.
 
<TABLE>
     <C>  <S>
      1.1 --Form of Underwriting Agreement with respect to Debt Securities
           (including form of Terms Agreement).
      1.2 --Form of Underwriting Agreement with respect to Equity Securities
           (including form of Terms Agreement).
      3.1 --Restated Certificate of Incorporation of the Company (filed as
           Module TCC-Artl-Incorp on March 28, 1994).
      3.2 --By-Laws of the Company, as amended on January 16, 1990 (Exhibit 3.4
           to the Company's Annual Report on Form 10-K for the year ended
           December 31, 1989) .
      4.1 --Form of Indenture for the Senior Debt Securities.
      4.2 --Form of Senior Debt Security (included in Exhibit No. 4.1).
      4.3 --Form of Indenture for the Subordinated Debt Securities.
      4.4 --Form of Subordinated Debt Security (included in Exhibit No. 4.3).
      4.5 --Form of Common Stock Warrant Agreement.
      4.6 --Form of Common Stock Warrant (included in Exhibit No. 4.5).
       5  --Opinion of Austin M. O'Toole, Esq., Senior Vice President and
           Secretary of the Registrant, as to the legality of the securities
           being registered.
     23.1 --Independent Auditors' Consent.
     23.2 --Consent of Austin M. O'Toole, Esq. (included in Exhibit No. 5).
      24  --Powers of Attorney (included on the signature pages hereof).
      25  --Statement of Eligibility of Trustee on Form T-1 for the Debt
           Securities.
</TABLE>
 
ITEM 17. UNDERTAKINGS.
 
 The undersigned Registrant hereby undertakes that, for purposes of
determining any liability under the Securities Act of 1933, each filing of the
Registrant's annual report pursuant to Section 13(a) or Section 15(d) of the
Securities Exchange Act of 1934 that is incorporated by reference in this
Registration Statement shall be deemed to be a new registration statement
relating to the securities offered therein, and the offering of such
securities at that time shall be deemed to be the initial bona fide offering
thereof.
 
                                     II-1
<PAGE>
 
  Insofar as indemnification for liabilities arising under the Securities Act
of 1933 may be permitted to directors, officers and controlling persons of the
Registrant pursuant to the foregoing provisions described under Item 15 above,
or otherwise, the Registrant has been advised that in the opinion of the
Securities and Exchange Commission such indemnification is against public
policy as expressed in the Securities Act of 1933 and is, therefore,
unenforceable. In the event that a claim for indemnification against such
liabilities (other than the payment by the Registrant of expenses incurred or
paid by a director, officer or controlling person of the Registrant in the
successful defense of any action, suit or proceeding) is asserted by such
director, officer or controlling person in connection with the securities
being registered, the Registrant will, unless in the opinion of its counsel
the matter has been settled by controlling precedent, submit to a court of
appropriate jurisdiction the question whether such indemnification by it is
against public policy as expressed in the Securities Act of 1933 and will be
governed by the final adjudication of such issue.
 
  The undersigned Registrant hereby undertakes:
 
    (1) to file, during any period in which offers or sales are being made, a
  post-effective amendment to this Registration Statement: (i) to include any
  prospectus required by Section 10(a)(3) of the Securities Act of 1933; (ii)
  to reflect in the prospectus any facts or events arising after the
  effective date of the Registration Statement (or the most recent post-
  effective amendment thereof) which, individually or in the aggregate,
  represent a fundamental change in the information set forth in the
  Registration Statement. Notwithstanding the foregoing, any increase or
  decrease in volume of securities offered (if the total dollar value of
  securities offered would not exceed that which was registered) and any
  deviation from the low or high end of the estimated maximum offering range
  may be reflected in the form of prospectus filed with the Commission
  pursuant to Rule 424(b) if, in the aggregate, the changes in volume and
  price represent no more than a 20% change in the maximum aggregate offering
  price set forth in the "Calculation of Registration Fee" table in the
  effective Registration Statement; (iii) to include any material information
  with respect to the plan of distribution not previously disclosed in the
  Registration Statement or any material change to such information in the
  Registration Statement; provided, however, that paragraphs (1)(i) and
  (1)(ii) do not apply if the information required to be included in a post-
  effective amendment by those paragraphs is contained in periodic reports
  filed by the Registrant pursuant to Section 13 or Section 15(d) of the
  Securities Exchange Act of 1934 that are incorporated by reference in the
  Registration Statement;
 
    (2) that, for the purpose of determining any liability under the
  Securities Act of 1933, each such post-effective amendment shall be deemed
  to be a new registration statement relating to the securities offered
  therein, and the offering of such securities at that time shall be deemed
  to be the initial bona fide offering thereof; and
 
    (3) to remove from registration by means of a post-effective amendment
  any of the securities being registered which remain unsold at the
  termination of the offering.
 
  The undersigned Registrant hereby undertakes to file an application for the
purpose of determining the eligibility of the applicable trustee to act under
subsection (a) of Section 310 of the Trust Indenture Act of 1939 in accordance
with the rules and regulations of the Securities and Exchange Commission under
Section 305(b)(2) of the Securities Act of 1933.
 
                                     II-2
<PAGE>
 
                              POWERS OF ATTORNEY
 
  Each person whose signature appears below hereby appoints David A. Arledge,
Coby C. Hesse and Austin M. O'Toole and each of them, any one of whom may act
without the joinder of the others, as his attorney-in-fact to sign on his
behalf and in the capacity stated below and to file all amendments and post-
effective amendments to this Registration Statement, which amendment or
amendments may make such changes and additions in this Registration Statement
as such attorney-in-fact may deem necessary or appropriate.
 
                                  SIGNATURES
 
  PURSUANT TO THE REQUIREMENTS OF THE SECURITIES ACT OF 1933, THE REGISTRANT
CERTIFIES THAT IT HAS REASONABLE GROUNDS TO BELIEVE THAT IT MEETS ALL OF THE
REQUIREMENTS FOR FILING ON FORM S-3 AND HAS DULY CAUSED THIS REGISTRATION
STATEMENT TO BE SIGNED ON ITS BEHALF BY THE UNDERSIGNED, THEREUNTO DULY
AUTHORIZED, IN THE CITY OF HOUSTON, STATE OF TEXAS, ON JANUARY 20, 1998.
 
                                                 THE COASTAL CORPORATION
                                                      (Registrant)
 
                                                  /s/ David A. Arledge
                                          By __________________________________
                                                      David A. Arledge
                                              Chairman of the Board, President
                                                 and Chief Executive Officer
 
  PURSUANT TO THE REQUIREMENTS OF THE SECURITIES ACT OF 1933, THIS
REGISTRATION STATEMENT HAS BEEN SIGNED BY THE FOLLOWING PERSONS IN THE
CAPACITIES AND ON THE DATES INDICATED.
 
<TABLE>
<CAPTION>
             SIGNATURE                           TITLE                    DATE
             ---------                           -----                    ----
<S>                                  <C>                           <C>
 /s/
          David A. Arledge
- ------------------------------------
          David A. Arledge              Chairman of the Board,
                                      President, Chief Executive
                                       Officer, Chief Financial
                                         Officer and Director
                                     (Principal Executive Officer
                                        and Principal Financial
                                               Officer)             January 20, 1998
 /s/
           Coby C. Hesse
- ------------------------------------
           Coby C. Hesse               Executive Vice President
                                         (Principal Accounting
                                               Officer)             January 20, 1998
 /s/
          John M. Bissell
- ------------------------------------
          John M. Bissell                      Director             January 20, 1998
 /s/
      George L. Brundrett, Jr.
- ------------------------------------
      George L. Brundrett, Jr.                 Director             January 20, 1998
 /s/
           Harold Burrow                                            January 20, 1998
- ------------------------------------
           Harold Burrow                       Director
</TABLE>
 
                                     II-3
<PAGE>
 
<TABLE>
<CAPTION>
             SIGNATURE                           TITLE                    DATE
             ---------                           -----                    ----
<S>                                  <C>                           <C>
 /s/
         Roy D. Chapin, Jr.
- ------------------------------------
         Roy D. Chapin, Jr.                    Director             January 20, 1998
 /s/
          James F. Cordes
- ------------------------------------
          James F. Cordes                      Director             January 20, 1998
 /s/
            Roy L. Gates
- ------------------------------------
            Roy L. Gates                       Director             January 20, 1998
 /s/
         Kenneth O. Johnson
- ------------------------------------
         Kenneth O. Johnson                    Director             January 20, 1998
 /s/
          Jerome S. Katzin
- ------------------------------------
          Jerome S. Katzin                     Director             January 20, 1998
 /s/
          Thomas R. McDade
- ------------------------------------
          Thomas R. McDade                     Director             January 20, 1998
 /s/
      J. Carleton MacNeil, Jr.
- ------------------------------------
      J. Carleton MacNeil, Jr.                 Director             January 20, 1998
 /s/
          O. S. Wyatt, Jr.
- ------------------------------------
          O. S. Wyatt, Jr.                     Director             January 20, 1998
 /s/
         L. D. Wooddy, Jr.
- ------------------------------------
         L. D. Wooddy, Jr.                     Director             January 20, 1998
</TABLE>
 
                                      II-4
<PAGE>
 
                               INDEX TO EXHIBITS
 
 EXHIBIT
 NUMBER                               DESCRIPTION
 -------                              -----------

   1.1   --Form of Underwriting Agreement with respect to Debt Securities
           (including form of Terms Agreement).
   1.2   --Form of Underwriting Agreement with respect to Equity Securities
           (including form of Terms Agreement).
   3.1   --Restated Certificate of Incorporation of the Company (filed as
           Module TCC-Artl-Incorp on March 28, 1994).
   3.2   --By-Laws of the Company, as amended on January 16, 1990 (Exhibit 3.4
           to the Company's Annual Report on Form 10-K for the year ended
           December 31, 1989) .
   4.1   --Form of Indenture for the Senior Debt Securities.
   4.2   --Form of Senior Debt Security (included in Exhibit No. 4.1).
   4.3   --Form of Indenture for the Subordinated Debt Securities.
   4.4   --Form of Subordinated Debt Security (included in Exhibit No. 4.3).
   4.5   --Form of Common Stock Warrant Agreement.
   4.6   --Form of Common Stock Warrant (included in Exhibit No. 4.5).
   5     --Opinion of Austin M. O'Toole, Esq., Senior Vice President and
           Secretary of the Registrant, as to the legality of the securities
           being registered.
  23.1   --Independent Auditors' Consent.
  23.2   --Consent of Austin M. O'Toole, Esq. (included in Exhibit No. 5).
  24     --Powers of Attorney (included on the signature pages hereof).
  25     --Statement of Eligibility of Trustee on Form T-1 for the Debt
           Securities.

<PAGE>
 
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------

                                                                     EXHIBIT 1.1
 
                            THE COASTAL CORPORATION
[LOGO APPEARS HERE]
                                      and
 
 
                             ---------------------
 
                             UNDERWRITING AGREEMENT
 
                                   DATED
 
                                      AND
 
                                TERMS AGREEMENT
 
                                   DATED
 
                             ---------------------
 
                                 $
                                  %     DUE
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
<PAGE>
 
                            THE COASTAL CORPORATION
 
                            UNDERWRITING AGREEMENT
 
                                                                         , 199
 
[Name and Address of Lead Underwriters]
 
Dear Sirs:
 
  The Coastal Corporation, a Delaware corporation (the "Company"), proposes to
issue and sell from time to time certain of its senior unsecured debt
securities referred to below (the "Senior Securities") and its subordinated
unsecured debt securities referred to below (the "Subordinated Securities" and
together with the Senior Securities, the "Securities") registered under the
registration statement referred to below. The Senior Securities will be issued
under an Indenture, as amended from time to time (the "Senior Indenture")
dated as of [     ], 1998 between the Company and Harris Trust and Savings
Bank, as Trustee (the "Senior Trustee"), and will have varying designations,
interest rates and times of payment of any interest, maturities, redemption
provisions, currencies and other terms, with all such terms for any particular
series of Senior Securities being determined at the time of sale. The
Subordinated Securities will be issued under an Indenture, as amended from
time to time (the "Subordinated Indenture" and together with the Senior
Indenture, the "Indentures"), dated as of [     ], 1998, between the Company
and Harris Trust and Savings Bank, as Trustee (the "Subordinated Trustee" and
together with the Senior Trustee, the "Trustees"), and will have varying
designations, interest rates and times of payment of any interest, maturities,
redemption provisions, currencies and other terms, with all such terms for any
particular series of the Securities being determined at the time of the sale.
Particular series of the Securities may be sold to you, and to other firms on
whose behalf you may act, for resale in accordance with the terms of offering
determined at the time of sale. The Securities involved in any such offering
are hereinafter referred to as the "Purchased Securities", and the firm or
firms which agree to purchase the same are hereinafter referred to as the
"Underwriters" of such Purchased Securities and the representative or
representatives of the Underwriters, if any, specified in a "Terms Agreement"
are hereinafter referred to as the "Representatives"; provided, however, that
if the Terms Agreement does not specify any representative of the
Underwriters, the term "Representatives" as used in this Agreement shall mean
the Underwriters. The terms and conditions herein shall constitute a separate
agreement between the Company and the respective Underwriters in regard to
each offering of Purchased Securities.
 
  This Agreement shall not limit or affect the right of the Company to offer
or sell any of the Securities through any other underwriters or agents or
through any other arrangements specified by the Company from time to time, and
this Agreement shall apply only to Securities in respect of which a Terms
Agreement shall have been executed as referred to herein.
 
  This is to confirm the agreement concerning the purchase of the Securities
from the Company by the Underwriters.
 
  1. REPRESENTATIONS AND WARRANTIES. The Company represents and warrants to,
and agrees with each Underwriter that:
 
    (a) A registration statement on Form S-3 (File No. 333-     ), prepared
  by the Company in conformity with the requirements of the Securities Act of
  1933, as amended, and the rules and regulations promulgated thereunder
  (collectively, the "Securities Act"), has been filed with the Securities
  and Exchange Commission (the "Commission") and has become effective for the
  registration under the Securities Act of the Securities. Copies of such
  registration statement and any amendments thereto, and all forms of the
  related prospectuses relating to the Securities contained therein, have
  been delivered to each Underwriter. Such registration statement, including
  the documents incorporated by reference therein and all
 
                                       1
<PAGE>
 
  financial schedules and exhibits thereto, as amended at the date of any
  Terms Agreement, is herein referred to as the "Registration Statement". As
  used in this Agreement, the term "Prospectus" means such prospectus
  included in the Registration Statement, supplemented by a Prospectus
  Supplement as contemplated by Section 2 hereof to reflect the terms of the
  Purchased Securities and the plan of distribution thereof. Any reference
  herein to the Registration Statement or the Prospectus shall be deemed to
  refer to and include the documents incorporated by reference therein
  pursuant to Item 12 of Form S-3 under the Securities Act, as of the date of
  the Prospectus, and any reference herein to the terms "amend", "amendment"
  or "supplement" with respect to any Prospectus shall be deemed to refer to
  and include any documents filed with the Commission after such date under
  the Securities Exchange Act of 1934, as amended, and the rules and
  regulations of the Commission promulgated thereunder (collectively, the
  "Exchange Act"), and so incorporated by reference (all such incorporated
  documents being herein called the "Incorporated Documents").
 
    (b) As of the date of any Terms Agreement, when the Prospectus is first
  filed pursuant to Rule 424(b) under the Securities Act and when, prior to
  the Closing Date (as defined in Section 2 hereof), any amendment to the
  Registration Statement becomes effective (including the filing of any
  document incorporated by reference in the Registration Statement) and at
  the Closing Date, the Registration Statement and the Prospectus, as amended
  or supplemented, shall comply in all material respects with the
  requirements of the Securities Act and the Trust Indenture Act of 1939, as
  amended, and the rules and regulations promulgated by the Commission
  thereunder (collectively, the "Trust Indenture Act"). No such document
  shall contain any untrue statement of a material fact or omit to state a
  material fact required to be stated therein or necessary to make the
  statements therein not misleading, except that the foregoing shall not
  apply to statements in or omissions from any such document in reliance upon
  and in conformity with written information furnished to the Company by any
  Underwriter specifically for use in the preparation thereof or to the part
  of the Registration Statement which constitutes the Statement of
  Eligibility of each Trustee under the Trust Indenture Act on Form T-1
  (each, a "Form T-1"), except statements or omissions in either Form T-1
  made in reliance on information furnished in writing to the Trustee by or
  on behalf of the Company for use in preparation thereof. There is no
  contract or document required to be described in the Registration Statement
  or the Prospectus or required to be filed as an exhibit to the Registration
  Statement that is not described or filed as required.
 
    (c) Deloitte & Touche LLP, whose report is incorporated by reference in
  the Prospectus, are independent certified public accountants as required by
  the Securities Act. The financial statements and schedules (including the
  related notes) included or incorporated by reference in the Registration
  Statement and the Prospectus, present fairly, in all material respects, the
  financial condition, the results of operations and cash flows of the
  entities purported to be shown thereby at the dates and for the periods
  indicated and have been prepared in accordance with generally accepted
  accounting principles.
 
    (d) The Incorporated Documents, when they became effective or were filed
  with the Commission, as the case may be, complied in all material respects
  with the requirements of the Securities Act or the Exchange Act, as
  applicable, and any documents so filed and incorporated by reference
  subsequent to the date of the Prospectus shall, when they are filed with
  the Commission, conform in all material respects to the requirements of the
  Securities Act and the Exchange Act, as applicable.
 
    (e) Each of the Company and its Subsidiaries has been duly organized and
  is validly existing as a corporation in good standing under the laws of the
  jurisdiction of its incorporation, with full power and authority (corporate
  and other) to own or lease its properties and conduct its business as
  described in the Prospectus, and is duly qualified to do business and is in
  good standing in each jurisdiction in which the character of the business
  conducted by it or the location of the properties owned or leased by it
  makes such qualification necessary, except where the failure to so qualify
  would not have a material adverse effect on the Company and its
  Subsidiaries taken as a whole.
 
    (f) All of the outstanding capital stock or other equity securities of
  each of the Subsidiaries of the Company have been duly and validly
  authorized and issued, are fully paid and nonassessable, and are owned
 
                                       2
<PAGE>
 
  by the Company free and clear of any mortgage, pledge (other than any
  negative pledge agreement to which the Company or any of its Subsidiaries
  may be a party), security interest or restrictions on transferability or
  voting.
 
    (g) Except as described in or contemplated by the Prospectus, there has
  not been any material adverse change in, or any adverse development which
  materially affects, the condition (financial or other), results of
  operation, business, prospects, net worth or assets of the Company and its
  Subsidiaries taken as a whole, from the date as of which information is
  given in the Prospectus.
 
    (h) Neither the Company nor any of its Subsidiaries is, nor with the
  giving of notice or lapse of time or both would be, in violation of or in
  default under, nor will the execution or delivery hereof or consummation of
  the transactions contemplated hereby result in a violation of, or
  constitute a default under, the certificate of incorporation, by-laws or
  other governing documents of the Company or any of its Subsidiaries, or any
  agreement, indenture or other instrument to which the Company or any of its
  Subsidiaries is a party or by which any of them is bound, or to which any
  of their properties is subject where the effect of such violation or
  default would have a material adverse effect on the Company and its
  Subsidiaries taken as a whole. The execution and delivery of this
  Agreement, the applicable Terms Agreement, the Indentures and any Delayed
  Delivery Contract (as defined in Section 2(c) hereof), the authorization,
  issuance and sale of the Purchased Securities, the fulfillment of this
  Agreement, the applicable Terms Agreement, the Indentures, the Purchased
  Securities and any Delayed Delivery Contract and the consummation of the
  transactions contemplated by each such agreement will not conflict with or
  constitute a breach of, or default (with the passage of time or otherwise)
  under, or result in the imposition of a lien on any properties of the
  Company or its Subsidiaries or an acceleration of indebtedness pursuant to,
  the certificate of incorporation or by-laws, or other governing documents
  of the Company or any of its Subsidiaries, or any bond, debenture, note or
  any other evidence of indebtedness or any indenture, mortgage, deed or
  trust or any other material agreement or instrument to which the Company or
  any of its Subsidiaries is a party or by which it or any of them is bound
  or to which any of the property or assets of the Company or any of its
  Subsidiaries is subject, or any law, administrative regulation or order of
  any court or governmental agency or authority applicable to the Company or
  any of its Subsidiaries. Except for the orders of the Commission declaring
  the Registration Statement effective under the Securities Act and
  qualifying the Indentures under the Trust Indenture Act, and permits and
  similar authorizations required under the securities or Blue Sky laws of
  certain jurisdictions, no consent, approval, authorization or order of any
  court, governmental agency or body or financial institution is required in
  connection with the consummation of the transactions contemplated by this
  Agreement or the applicable Terms Agreement.
 
    (i) This Agreement and the applicable Terms Agreement have been duly
  authorized, executed and delivered by the Company and each constitutes the
  legal, valid and binding obligation of the Company.
 
    (j) The Purchased Securities have been duly authorized and when executed,
  authenticated and delivered in accordance with the terms of the applicable
  Indenture will be legal, valid and binding obligations of the Company
  enforceable in accordance with their terms, except that (i) the
  enforceability thereof may be subject to bankruptcy, insolvency,
  reorganization, moratorium or other similar laws now or hereafter in effect
  relating to creditors' rights generally, (ii) the remedy of specific
  performance and injunctive and other forms of equitable relief may be
  subject to equitable defenses and to the discretion of the court before
  which any proceedings therefor may be brought and (iii) the waiver as to
  usury may be unenforceable. The Purchased Securities will be entitled to
  the benefits of the applicable Indenture, and will conform in all material
  respects to the description thereof in the Prospectus.
 
    (k) The Indentures have been duly authorized and when executed and
  delivered by the Company will be the legal, valid and binding agreement of
  the Company enforceable in accordance with its terms, except that (i) the
  enforceability thereof may be subject to bankruptcy, insolvency,
  reorganization, moratorium or other similar laws now or hereafter in effect
  relating to creditors' rights generally, (ii) the remedy of specific
 
                                       3
<PAGE>
 
  performance and injunctive and other forms of equitable relief may be
  subject to equitable defenses and to the discretion of the court before
  which any proceedings therefor may be brought and (iii) the waiver as to
  usury may be unenforceable. Each Indenture conforms in all material
  respects to its description in the Prospectus.
 
    (l) The Delayed Delivery Contracts, if any, have been duly authorized and
  when executed and delivered by the Company will be the legal, valid and
  binding agreements of the Company enforceable in accordance with their
  terms, except that (i) the enforceability thereof may be subject to
  bankruptcy, insolvency, reorganization, moratorium or other similar laws
  now or hereafter in effect relating to creditors' rights generally and (ii)
  the remedy of specific performance and injunctive and other forms of
  equitable relief may be subject to equitable defenses and to the discretion
  of the court before which any proceedings therefor may be brought.
 
    (m) Subsequent to the respective dates as of which information is given
  in the Registration Statement and Prospectus and prior to the Closing Date,
  neither the Company nor any of its Subsidiaries has incurred or will have
  incurred any liabilities or obligations for borrowed money, direct or
  contingent, or entered into any transactions, not in the ordinary course of
  business and material to the business of the Company and its Subsidiaries
  taken as a whole, and there has not been and will not have been any
  material change in the capital stock or long-term indebtedness of the
  Company or any of its Subsidiaries, or any material adverse change in the
  business, prospects, financial position, net worth or assets or results of
  operations of the Company and its Subsidiaries taken as a whole.
 
    (n) The Company and its Subsidiaries have such interests in their
  respective real (including leasehold interests) and personal properties
  that they reasonably believe are necessary, in the aggregate, to use such
  properties in the manner presently used or proposed to be used by the
  Company and its Subsidiaries.
 
    (o) Except as described in the Prospectus, there is no litigation or
  governmental proceeding to which the Company or any of its Subsidiaries is
  a party or to which any property of the Company or any of its Subsidiaries
  is subject or which is pending or, to the knowledge of the Company,
  contemplated against the Company or any of its Subsidiaries which might
  result in any material adverse change in the condition (financial or
  other), results of operations, business, prospects, net worth or assets of
  the Company and its Subsidiaries taken as a whole.
 
    (p) Neither the Company nor any Subsidiary is in violation of any law,
  ordinance, governmental rule or regulation or court decree to which it may
  be subject which violation might have a material adverse effect on the
  condition (financial or other), results of operations, business, prospects,
  net worth or assets of the Company and its Subsidiaries taken as a whole.
 
    (q) The conditions for use of Form S-3, set forth in the General
  Instructions thereto, have been satisfied.
 
  2. PURCHASE AND OFFERING.
 
    (a) The obligations of the Underwriters to purchase the Purchased
  Securities will be evidenced by an exchange of telegraphic or other written
  communications substantially in the form attached as Exhibit A hereto (a
  "Terms Agreement") at each time the Company determines to sell Purchased
  Securities, with such other provisions which the Representatives and the
  Company shall agree upon. Each Terms Agreement shall specify the firms
  which will be Underwriters (who shall become bound by the terms hereof when
  the Terms Agreement has been entered into), the principal amount to be
  purchased by each Underwriter, the purchase price to be paid by the
  Underwriters and the terms of the Purchased Securities not already
  specified in the applicable Indenture, including, but not limited to,
  interest rates, maturities, redemption provisions and sinking fund
  requirements. Each Terms Agreement shall also specify the date of delivery
  and payment for the Purchased Securities other than any Contract Securities
  (as defined in Section 2(c) hereof) and any
 
                                       4
<PAGE>
 
  details of the terms of offering which should be reflected in the
  Prospectus Supplement relating to the offering of the Purchased Securities.
  Such Prospectus Supplement shall set forth the terms contained in the Terms
  Agreement and such other information that you and the Company agree at the
  time the Terms Agreement is entered into should be included in the
  Prospectus Supplement. Insofar as any provision of this Agreement is
  inconsistent with any provision of the applicable Terms Agreement, the
  Terms Agreement shall be deemed to control. Purchased Securities to be
  purchased by Underwriters are herein referred to as "Underwriters'
  Securities", and any Purchased Securities to be purchased pursuant to
  Delayed Delivery Contracts as hereinafter provided are herein referred to
  as "Contract Securities". The obligations of the Underwriters to purchase
  the Underwriters' Securities shall be several and not joint. It is
  understood that the Underwriters propose to offer the Purchased Securities
  for sale as set forth in such Prospectus Supplement.
 
    (b) Payment of the purchase price for the Underwriters' Securities shall
  be made to the Company or its order in New York Clearing House funds, by
  certified or official bank check, against delivery of the Underwriters'
  Securities to you for the respective accounts of the Underwriters;
  provided, however, that at the request of the Company, payment will be made
  in immediately available funds, in which case the Company will reimburse
  you for your cost of obtaining such funds. Such payment and delivery shall
  be made at 10:00 A.M. New York time on the date of delivery specified in
  the Terms Agreement (unless another time not later than 10:00 A.M. New York
  time on the fifth Business Day thereafter shall be agreed to by you and the
  Company or unless postponed in accordance with the provisions of Section 7
  hereof). The time and date that such payment and delivery are actually made
  is herein sometimes referred to as the "Closing Date". The Underwriters'
  Securities shall be delivered to you in definitive form, in temporary or
  final form, and in such names and denominations as you shall request at
  least one Business Day prior to the Closing Date by written notice to the
  Company. For the purpose of expediting the checking and packaging of the
  Underwriters' Securities by you, the Company agrees to make them available
  to you for such purpose before the close of business on the Business Day
  prior to the Closing Date.
 
    (c) If any Terms Agreement provides for sales of Purchased Securities
  pursuant to Delayed Delivery Contracts, the Company authorizes the
  Underwriters to solicit offers to purchase Contract Securities pursuant to
  Delayed Delivery Contracts substantially in the form of Schedule I attached
  hereto (the "Delayed Delivery Contracts") with such changes therein as the
  Company may approve. Delayed Delivery Contracts are to be with
  institutional investors, including commercial and savings banks, insurance
  companies, pension funds, investment companies and educational and
  charitable institutions. At the time of purchase the Company will pay you
  as compensation, for the accounts of the Underwriters, the compensation set
  forth in such Terms Agreement in respect of the principal amount of
  Contract Securities. The Underwriters will not have any responsibility in
  respect of the validity or the performance of Delayed Delivery Contracts.
  If the Company executes and delivers Delayed Delivery Contracts, the
  Contract Securities shall be deducted from the Purchased Securities to be
  purchased by the several Underwriters and the aggregate principal amount of
  Purchased Securities to be purchased by each Underwriter shall be reduced
  pro rata in proportion to the principal amount of Purchased Securities set
  forth opposite each Underwriter's name in such Terms Agreement, except to
  the extent that you determine that such reduction shall be otherwise
  allocated and so advise the Company.
 
  3. COVENANTS. The Company covenants and agrees with each Underwriter that
they will furnish to counsel for the Underwriters, without charge, one signed
copy of the Registration Statement, including all exhibits, in the form it
became effective and of all amendments thereto and that, in connection with
each offering of Securities:
 
    (a) The Company shall notify you promptly of any request by the
  Commission for any amendment of or supplement to the Registration Statement
  or the Prospectus, or for additional information; the Company shall prepare
  and file with the Commission, promptly upon your request, any amendments of
  or supplements to the Registration Statement or the Prospectus which, in
  your opinion after consultation with the Company, may be necessary or
  advisable in connection with the distribution of the Securities and the
  Company shall
 
                                       5
<PAGE>
 
  not file any amendment or supplement to the Registration Statement or the
  Prospectus or file any document under the Exchange Act before the
  termination of the offering of the Securities if such document would be
  deemed to be incorporated by reference therein which is not approved by you
  after reasonable notice thereof, such approval not to be unreasonably
  withheld or delayed. The Company shall notify you promptly of the filing
  with the Commission of the Prospectus supplemented by the Prospectus
  Supplement relating to the Purchased Securities. The Company shall advise
  you promptly of the issuance by the Commission or any State or other
  regulatory body of any stop order or other order suspending the
  effectiveness of the Registration Statement, suspending or preventing the
  use of the Prospectus, or suspending the qualification of the Securities
  for offering or sale in any jurisdiction, or of the institution of any
  proceedings for any such purpose; and the Company shall use its best
  efforts to prevent the issuance of any stop order or other such order and,
  should a stop order or other such order be issued, to obtain as soon as
  possible the lifting thereof.
 
    (b) The Company shall furnish to you, from time to time and without
  charge, copies of the Registration Statement of which each Representative
  shall receive a conformed copy and which shall include exhibits and all
  amendments and supplements to any of such documents (including any
  Incorporated Documents), in each case as soon as available and in such
  quantities as you may from time to time reasonably request.
 
    (c) If any event occurs as a result of which the Prospectus as then
  amended or supplemented would include an untrue statement of a material
  fact or omit to state a material fact necessary to make the statements
  therein, in the light of the circumstances under which they were made, not
  misleading, or if it is necessary to amend the Registration Statement or
  supplement the Prospectus to comply with the Securities Act, the Company
  shall promptly notify you and shall amend the Registration Statement or
  supplement the Prospectus or file such document (at the expense of the
  Company) so as to correct such statement or omission or effect such
  compliance.
 
    (d) The Company shall take or cause to be taken all necessary action and
  furnish to whomever you may direct such information as may be required in
  qualifying the Purchased Securities for sale under the laws of such
  jurisdictions as the Representative shall designate and to continue such
  qualifications in effect for as long as may be necessary for the
  distribution of the Purchased Securities; except that in no event shall the
  Company be obligated in connection therewith to qualify as a foreign
  corporation, or to execute a general consent for service of process.
 
    (e) The Company shall make generally available to holders of the
  Purchased Securities, in the manner contemplated by Rule 158(b) under the
  Securities Act or otherwise, as soon as practicable after the date of the
  applicable Terms Agreement, but in any event not later than 45 days after
  the end of its fiscal quarter in which the first anniversary date of the
  date of the Terms Agreement occurs (or 90 days if such fiscal quarter is
  the last fiscal quarter of its fiscal year), an earnings statement
  satisfying the requirements of Section 11(a) of the Securities Act and
  covering a period of at least 12 consecutive months beginning after the
  effective date of the Registration Statement.
 
    (f) The Company shall apply the net proceeds of the sale of Purchased
  Securities as set forth in the Prospectus.
 
    (g) Whether or not this Agreement becomes effective or is terminated or
  the sale of the Purchased Securities to you is consummated, the Company
  shall pay or cause to be paid (A) all expenses (including transfer taxes)
  incurred in connection with the delivery to the Underwriters of the
  Purchased Securities, (B) all fees and expenses (including, without
  limitation, fees and expenses of the Company's accountants and counsel, but
  excluding fees and expenses of counsel to the Underwriters except as set
  forth in (C)) in connection with the preparation, printing, filing,
  delivery and shipping of the Registration Statement (including the
  financial statements therein and all amendments and exhibits thereto) and
  the Prospectus as amended or supplemented, and the printing, delivery and
  shipping of this Agreement, any Terms Agreement, any agreement among or
  between Underwriters and other underwriting documents, including the Blue
  Sky Survey and any legal investment survey, (C) all filing fees and fees
  and disbursements of
 
                                       6
<PAGE>
 
  counsel to the Underwriters incurred in connection with the qualification
  of the Purchased Securities under state securities laws as provided in
  Section 3(d) hereof, (D) the filing fee of the National Association of
  Securities Dealers, Inc., if any, (E) any applicable listing fees, (F) the
  cost of printing the Indenture and certificates representing the Purchased
  Securities, (G) the cost and charges of each of the Trustees, (H) any fees
  payable to rating agencies in connection with the rating of the Purchased
  Securities and (I) all other costs and expenses incident to the performance
  of its obligations hereunder which are not otherwise provided for in this
  Section. It is understood however, that, except as provided in this Section
  3(g), Section 5 and Section 6 hereof, each of the Underwriters shall pay
  all of its own costs and expenses including the fees of its counsel (except
  as set forth in (C) above) and any advertising expenses connected with any
  offers it may make. If the sale of the Purchased Securities provided for
  herein is not consummated by reason or acts of the Company pursuant to
  Section 6 hereof which prevent this Agreement or any Terms Agreement from
  becoming effective, or by reason of any failure, refusal or inability on
  the part of the Company to perform any agreement on its part to be
  performed or because any other condition of the Underwriters' obligations
  hereunder is not fulfilled, the Company shall reimburse each of the
  Underwriters for all reasonable out-of-pocket disbursements (including fees
  and disbursements of counsel) incurred by the Underwriters in connection
  with your investigation of or any preparation by them in respect of
  marketing the Purchased Securities or in contemplation of performing their
  respective obligations hereunder.
 
    (h) Prior to the Closing Date, the Company, at your request, shall
  furnish to you as soon as they have been prepared by the Company a copy of
  any unaudited interim consolidated financial statements of the Company and
  its Subsidiaries for any period subsequent to the period covered by the
  financial statements appearing in the Registration Statement and the
  Prospectus.
 
  4. CONDITIONS OF YOUR OBLIGATIONS. Your obligations are subject to the
accuracy, as of the date hereof and the Closing Date (as if made at such
Closing Date), of the representations and warranties of the Company contained
herein, to the performance by the Company of its obligations hereunder and to
the following additional conditions:
 
    (a) The Company shall have filed with the Commission on a timely basis
  pursuant to Rule 424(b) under the Securities Act, the Prospectus as
  supplemented by the Prospectus Supplement covering the Purchased
  Securities. No stop order suspending the effectiveness of the Registration
  Statement shall have been issued and no proceedings for that purpose shall
  be pending, threatened or contemplated by the Commission or any state
  securities or Blue Sky authority.
 
    (b) You shall not have advised the Company that the Registration
  Statement, any Prospectus, or any amendment or supplement thereto, contains
  an untrue statement of fact which, in your opinion, is material or omits to
  state a fact which, in your opinion, is material and is required to be
  stated therein or is necessary to make the statements therein not
  misleading.
 
    (c) You shall have received an opinion of Austin M. O'Toole, Esq., Senior
  Vice President and Secretary of the Company, dated the Closing Date and
  satisfactory to Cahill Gordon & Reindel, your counsel, to the effect that:
 
      (i) each of the Company and its Subsidiaries has been duly
    incorporated and is a validly existing corporation in good standing
    under the laws of its respective jurisdiction of incorporation with
    full corporate power and authority to own and occupy its properties and
    carry on its business as presently conducted and as described in the
    Prospectus, and the Company and each of its Subsidiaries is registered
    or qualified to conduct business and is in good standing in each
    jurisdiction in which, to the best of such counsel's knowledge, their
    failure to so register or qualify would have a material adverse effect
    on the Company and its Subsidiaries taken as a whole; all of the
    outstanding capital stock or other equity securities of each of the
    Subsidiaries of the Company have been duly and validly authorized and
    issued, are fully paid and nonassessable, and are owned by the Company
 
                                       7
<PAGE>
 
    free and clear of any mortgage, pledge (other than any negative pledge
    agreement to which the Company or any of its Subsidiaries may be a
    party), security interest or restrictions on transferability or voting,
    other than certain equity securities of Colorado Interstate Gas
    Company, which has outstanding capital stock held by entities not
    affiliated with the Company but which Subsidiary the Company, directly
    or indirectly, has control of its voting power and management, and
    other than the capital stock of the first tier subsidiaries of Coastal
    Natural Gas Company which has been pledged to secure certain
    borrowings;
 
      (ii) this Agreement, the Terms Agreement and the Indentures have been
    duly authorized, executed and delivered by the Company, and this
    Agreement, the Terms Agreement and the Indenture are legal, valid and
    binding agreements of the Company enforceable in accordance with their
    respective terms, except that (a) the enforceability hereof and thereof
    may be subject to bankruptcy, insolvency, reorganization, moratorium or
    other similar laws now or hereafter in effect relating to creditors'
    rights generally, (b) the remedy of specific performance and injunctive
    and other forms of equitable relief may be subject to equitable
    defenses and to the discretion of the court before which any
    proceedings therefor may be brought, (c) rights to indemnity and
    contribution hereunder may be limited by Federal and state securities
    laws or the policies underlying such laws and (d) the waiver as to
    usury in the Indentures may be unenforceable;
 
      (iii) the Delayed Delivery Contracts, if any, have been duly
    authorized, executed and delivered by the Company and (assuming that
    they have been duly authorized, executed and delivered by the
    purchasers thereunder) are valid and binding agreements of the Company;
 
      (iv) to the best knowledge of such counsel, there are no legal or
    governmental proceedings pending or threatened to which the Company or
    any of its Subsidiaries is a party, or of which the business or
    properties of the Company or any of its Subsidiaries is the subject,
    which are required to be disclosed in the Registration Statement and
    the Prospectus and are not so disclosed and there is no contract or
    document concerning the Company or any of its Subsidiaries of a
    character required to be described in the Prospectus or to be filed as
    an exhibit to the Registration Statement which is not described or
    filed as required;
 
      (v) the execution and delivery of this Agreement, the Terms Agreement
    and any Delayed Delivery Contract, the authorization, issuance and sale
    of the Purchased Securities, the fulfillment of the terms of the
    Indentures, this Agreement, the Terms Agreement and any Delayed
    Delivery Contract, and the consummation of the transactions
    contemplated by the Indentures, this Agreement, the Terms Agreement and
    any Delayed Delivery Contract, will not conflict with or constitute a
    breach of, or default (with the passage of time or otherwise) under, or
    result in the imposition of a lien on any properties of the Company or
    its Subsidiaries or an acceleration of indebtedness pursuant to, the
    certificate of incorporation and by-laws, or other equivalent
    instruments of the Company or any of its Subsidiaries or, to the best
    of such counsel's knowledge, any bond, debenture, note or any other
    evidence of indebtedness or any indenture, mortgage, deed of trust, or
    any other material agreement or instrument to which the Company or any
    of its Subsidiaries is subject where such breach or default would have
    a material adverse effect on the Company and its Subsidiaries taken as
    a whole, or any law, administrative regulation or court or governmental
    agency or authority ruling or decree known to such counsel to be
    applicable to the Company or any of its Subsidiaries or any of their
    properties or assets; and all legally required proceedings in
    connection with the authorization, issuance and sale of the Securities
    in accordance with the terms of this Agreement, the Terms Agreement and
    the Indentures have been taken and, except for permits and similar
    authorizations required under the securities or Blue Sky laws of
    certain jurisdictions (as to which such counsel need express no
    opinion), all consents, approvals, authorizations or other orders of
    any regulatory body, administrative agency or other governmental body
    legally required for the valid issuance and sale of the Purchased
    Securities or any transactions contemplated hereunder have been
    obtained;
 
                                       8
<PAGE>
 
      (vi) the Underwriters' Securities have been duly authorized and when
    executed and authenticated in accordance with the terms of the
    Indenture and delivered to, and paid for by, you will be legal, valid
    and binding obligations of the Company; the Contract Securities have
    been duly authorized and when executed and authenticated in accordance
    with the terms of the applicable Indenture and when issued and
    delivered against payment as provided in the Delayed Delivery
    Contracts, will have been duly issued and will constitute legal, valid
    and binding obligations of the Company, enforceable in accordance with
    their terms and the Underwriters' Securities are, and the Contract
    Securities will be, entitled to the benefits provided by the applicable
    Indenture, except that (a) the enforceability thereof may be subject to
    bankruptcy, insolvency, reorganization, moratorium or similar laws
    affecting creditors' rights generally, (b) the remedy of specific
    performance and injunctive and other forms of equitable relief may be
    subject to equitable defenses and to the discretion of the court before
    which any proceeding therefor may be brought and (c) the waiver as to
    usury in the Indentures may be unenforceable;
 
      (vii) the Registration Statement has become effective under the
    Securities Act, and, to the best knowledge of such counsel, no stop
    order suspending the effectiveness of the Registration Statement has
    been issued and no proceedings for that purpose have been instituted or
    are pending or contemplated;
 
      (viii) the Indentures have been qualified under the Trust Indenture
    Act;
 
      (ix) the Purchased Securities, the Delayed Delivery Contracts (if
    any) and the Indenture conform in all material respects to the
    descriptions thereof in the Prospectus; and
 
      (x) except as to financial statements and schedules and other
    financial or statistical data included therein, and the exhibits
    thereto including each Form T-1, as to which such counsel need not
    express any opinion, (a) the Registration Statement and the Prospectus
    and any supplements or amendments thereto comply as to form in all
    material respects with the Securities Act, (b) the Indentures comply as
    to form in all material respects with the Trust Indenture Act, and (c)
    the Incorporated Documents comply as to form in all material respects
    with the requirements of the Exchange Act and, to the best knowledge of
    such counsel, no such Incorporated Document contains an untrue
    statement of a material fact or omits to state a material fact required
    to be stated therein or necessary to make the statements therein not
    misleading.
 
    In addition, such counsel shall state that such counsel has participated
  in conferences with officers and other representatives of the Company,
  representatives of the independent public accountants for the Company and
  you at which the contents of the Registration Statement and Prospectus and
  related matters were discussed and, although such counsel is not passing
  upon and does not assume any responsibility for the accuracy, completeness
  or fairness of the statements contained in the Registration Statement and
  Prospectus (except to the extent stated in paragraph (ix) above), on the
  basis of the foregoing (relying as to materiality to a large extent upon
  the opinions of officers and other representatives of the Company), no
  facts have come to the attention of such counsel that lead him to believe
  that either the Registration Statement or any amendment thereto at the time
  such Registration Statement or amendment became effective contained an
  untrue statement of a material fact or omitted to state a material fact
  required to be stated therein or necessary to make the statements therein
  not misleading or that the Prospectus as of its date or any supplement
  thereto as of its date, and as of the Closing Date, contained an untrue
  statement of a material fact or omitted to state a material fact necessary
  in order to make the statements therein, in the light of the circumstances
  under which they were made, not misleading (it being understood that such
  counsel need not comment as to the financial statements, schedules and
  other statistical and financial data included in the Registration Statement
  or Prospectus or the exhibits (including each Form T-1) to the Registration
  Statement).
 
    (d) You shall have received on the Closing Date from Cahill Gordon &
  Reindel, your counsel, an opinion to the effect set forth in clauses (ii),
  (iii), (vi), (vii), (viii), (ix), (x)(a) (except with respect to the
  Incorporated Documents) and (x)(b) of Section 4(c) hereof. In addition,
  such counsel shall state that
 
                                       9
<PAGE>
 
  such counsel has participated in conferences with officers and other
  representatives of the Company, counsel for the Company, representatives of
  the independent public accountants for the Company and your representatives
  at which the contents of the Registration Statement and Prospectus and
  related matters were discussed and, although such counsel is not passing
  upon and does not assume any responsibility for the accuracy, completeness
  or fairness of the statements contained in the Registration Statement and
  Prospectus (except to the extent provided in paragraph (ix) of Section 4(c)
  hereof), on the basis of the foregoing (relying as to materiality to a
  large extent upon the opinions of officers and other representatives of the
  Company), no facts have come to the attention of such counsel that lead
  them to believe that either the Registration Statement or any amendment
  thereto at the time such Registration Statement or amendment became
  effective contained an untrue statement of a material fact or omitted to
  state a material fact required to be stated therein or necessary to make
  the statements therein not misleading or that the Prospectus as of its date
  or any supplement thereto as of its date contained an untrue statement of a
  material fact or omitted to state a material fact necessary in order the
  make the statements therein, in the light of the circumstances under which
  they were made, not misleading (it being understood that such counsel need
  express no comment with respect to the financial statements, schedules and
  other financial or statistical data included or incorporated by reference
  in the Registration Statement or Prospectus or the exhibits (including each
  Form T-1) to the Registration Statement).
 
    (e) There shall have been furnished to you a certificate, dated the
  Closing Date and addressed to you, signed by the President, or any Vice
  President and the Chief Financial Officer, any financial Vice President or
  the Treasurer of the Company to the effect that: (i) the representations
  and warranties of the Company contained in this Agreement are true and
  correct, as if made at and as of the Closing Date, and the Company has
  complied with all the agreements and satisfied all the conditions on its
  part to be performed or satisfied at or prior to the Closing Date; (ii) no
  stop order suspending the effectiveness of the Registration Statement has
  been issued, and no proceedings for that purpose have been initiated or
  threatened; (iii) all filings required by Rule 424 of the Securities Act
  have been made; (iv) the signers of said certificate have carefully
  examined the Registration Statement and the Prospectus, and any amendments
  or supplements thereto (including any documents filed under the Exchange
  Act and deemed to be incorporated by reference therein), and such documents
  contain all statements and information required to be included therein, and
  do not include any untrue statement of a material fact or omit to state any
  material fact required to be stated therein or necessary to make the
  statements therein not misleading; and (v) since the execution of the Terms
  Agreement, there has occurred no event required to be set forth in an
  amendment or supplement to the Registration Statement or the Prospectus
  which has not been so set forth; and there has been no document required to
  be filed under the Exchange Act that upon such filing would be deemed to be
  incorporated by reference into the Prospectus that has not been so filed.
 
    (f) Since the execution of the Terms Agreement, neither the Company nor
  any of its Subsidiaries shall have sustained any loss by fire, flood,
  accident or other calamity, or shall have become a party to or be subject
  to any litigation, which is material to the Company and its Subsidiaries
  taken as a whole, nor shall there have been a material adverse change in
  the general affairs, business, key personnel, capitalization, financial
  position or net worth of the Company and its Subsidiaries taken as a whole,
  whether or not arising in the ordinary course of business, which loss,
  litigation or change, in your judgment, shall render it inadvisable to
  proceed with the delivery of the Purchased Securities.
 
    (g) On the date of execution of the Terms Agreement and the Closing Date
  you shall have received a letter of Deloitte & Touche LLP, dated the date
  of execution of the Terms Agreement and the Closing Date, as the case may
  be, and addressed to you, confirming that they are independent certified
  public accountants, within the meaning of the Securities Act, and stating,
  as of the date of such letter (or, with respect to matters involving
  changes or developments since the respective dates as of which specified
  financial information is given or incorporated in the Prospectus, and a
  date not more than five days prior to the date of such letter), the
  conclusions and findings of such firm with respect to the financial
  information and other matters requested to be covered by its letter
  delivered to you concurrently with the execution of the Terms
 
                                      10
<PAGE>
 
  Agreement and, with respect to the letter delivered on the Closing Date,
  confirming the conclusions and findings set forth in such prior letter.
 
    (h) That the Company shall have accepted Delayed Delivery Contracts in
  any case where sales of Contract Securities arranged by the Underwriters
  have been approved by the Company.
 
    (i) You shall have been furnished with such additional documents and
  certificates as you may reasonably request.
 
    All such opinions, certificates, letters and documents shall be in
  compliance with the provisions hereof only if they are reasonably
  satisfactory in form and substance to you and to counsel for the
  Underwriters. The Company shall furnish to you such conformed copies of
  such opinions, certificates, letters and other documents as you shall
  reasonably request. If any of the conditions specified in this Section 4
  shall not have been fulfilled when and as required by this Agreement, this
  Agreement and the applicable Terms Agreement and all obligations of the
  Underwriters hereunder and thereunder may be cancelled at, or at any time
  prior to, the Closing Date, by you. Any such cancellation shall be without
  liability of the Underwriters to the Company. Notice of such cancellation
  shall be given to the Company in writing, or by telegraph or telephone and
  confirmed in writing.
 
  5. INDEMNIFICATION AND CONTRIBUTION. (a) The Company shall indemnify and
hold harmless each of the Underwriters against any loss, claim, damage or
liability to which the Underwriters may become subject, under the Securities
Act or otherwise, insofar as such loss, claim, damage or liability (or action
in respect thereof) arises out of or is based upon (i) any untrue statement or
alleged untrue statement made by the Company in Section 1 hereof, or (ii) any
untrue statement or alleged untrue statement of a material fact contained (A)
in the Registration Statement or the Prospectus or any amendment or supplement
thereto, or (B) in any Blue Sky application or other document executed by the
Company specifically for the purpose or based upon any written information
furnished by the Company filed in any state or other jurisdiction in order to
qualify any or all of the Purchased Securities under the securities laws
thereof (any such application, document or information being hereinafter
called "Blue Sky Information"), or (iii) the omission or alleged omission to
state in the Registration Statement or the Prospectus or any amendment or
supplement thereto or in any Blue Sky Information a material fact required to
be stated therein or necessary to make the statements therein not misleading;
and shall reimburse each of the Underwriters for any legal or other reasonable
expenses as incurred by the Underwriters in connection with investigating or
defending against or appearing as a third-party witness in connection with any
such loss, claim, damage, liability or action, notwithstanding the possibility
that payments for such expenses might later be held to be improper, in which
case the person receiving them shall promptly refund them; provided, however,
that the Company shall not be liable to an Underwriter in any such case to the
extent, but only to the extent, that any such loss, claim, damage or liability
arises out of or is based upon an untrue statement or alleged untrue statement
or omission or alleged omission made in reliance upon and in conformity with
written information furnished to the Company by such Underwriter specifically
for use in the preparation of the Registration Statement, Prospectus or any
amendment or supplement thereto, or any Blue Sky Information.
 
  (b) Each of the Underwriters, severally but not jointly, shall indemnify and
hold harmless the Company against any loss, claim, damage or liability to
which the Company may become subject, under the Securities Act or otherwise,
insofar as such loss, claim, damage or liability (or action in respect
thereof) arises out of or is based upon (i) any untrue statement or alleged
untrue statement of a material fact contained (A) in the Registration
Statement or the Prospectus or any amendment or supplement thereto, or (B) in
any Blue Sky Information, or (ii) the omission or alleged omission to state in
the Registration Statement or the Prospectus or any amendment or supplement
thereto or in any Blue Sky Information a material fact required to be stated
therein or necessary to make the statements therein not misleading; and shall
reimburse any legal or other expenses reasonably incurred by the Company in
connection with investigating or defending against any such loss, claim,
damage, liability or action, notwithstanding the possibility that payments for
such expenses might later be held
 
                                      11
<PAGE>
 
to be improper, in which case the Company shall promptly refund them;
provided, however, that such indemnification and expense reimbursement shall
be available from an Underwriter to the extent, but only to the extent, that
such untrue statement or alleged untrue statement or omission or alleged
omission was made in reliance upon and in conformity with written information
furnished to the Company by such Underwriter specifically for use in the
preparation thereof.
 
  (c) Promptly after receipt by an indemnified party under subsection (a) or
(b) above of notice of any claim or the commencement of any action, the
indemnified party shall, if a claim in respect thereof is to be made against
the indemnifying party under such subsection, notify the indemnifying party in
writing of the claim or the commencement of that action; provided, however,
that the failure to notify the indemnifying party shall not relieve it from
any liability which it may have to an indemnified party otherwise than under
such subsection. If any such claim or action shall be brought against an
indemnified party, and it shall notify the indemnifying party thereof, the
indemnifying party shall be entitled to participate therein and, to the extent
that it wishes, jointly with any other similarly notified indemnifying party,
to assume the defense thereof with counsel reasonably satisfactory to the
indemnified party. After notice from the indemnifying party to the indemnified
party of its election to assume the defense of such claim or action, the
indemnifying party shall not be liable to the indemnified party under such
subsection for any legal or other expenses subsequently incurred by the
indemnified party in connection with the defense thereof other than reasonable
costs of investigation; except that you shall have the right to employ counsel
to represent you in connection with any claim in respect of which indemnity
may be sought by the Underwriters against the Company under such subsection
if, in your reasonable judgment, it is advisable for you to be represented by
separate counsel, and in that event the reasonable fees and expenses of such
separate counsel shall be paid by the Company.
 
  (d) If the indemnification provided for in this Section 5 is unavailable or
insufficient to hold harmless an indemnified party under subsection (a) or (b)
above, then each indemnifying party shall contribute to the amount paid or
payable by such indemnified party as a result of the losses, claims, damages
or liabilities referred to in subsection (a) or (b) above (i) in such
proportion as is appropriate to reflect the relative benefits received by the
Company on the one hand and the Underwriters on the other hand from the
offering of the Purchased Securities or (ii) if the allocation provided by
clause (i) above is not permitted by applicable law, in such proportion as is
appropriate to reflect not only the relative benefits referred to in clause
(i) above but also the relative fault of the Company on the one hand and the
Underwriters on the other in connection with the statements or omissions that
resulted in such losses, claims, damages or liabilities, as well as any other
relevant equitable considerations. The relative benefits received by the
Company on the one hand and the Underwriters on the other shall be deemed to
be in the same proportion as the total net proceeds from the offering of the
Purchased Securities (before deducting expenses) received by the Company bear
to the total underwriting discounts and commissions received by the
Underwriters as set forth in the Prospectus Supplement covering the Purchased
Securities. Relative fault shall be determined by reference to, among other
things, whether the untrue or alleged untrue statement of a material fact or
the omission or alleged omission to state a material fact relates to
information supplied by the Company or the Underwriters and the parties'
relative intent, knowledge, access to information and opportunity to correct
or prevent such untrue statement or omission. The Company and the Underwriters
agree that it would not be just and equitable if contribution pursuant to this
subsection (d) were to be determined by pro rata allocation or by any other
method of allocation which does not take into account the equitable
considerations referred to in the first sentence of this subsection (d). The
amount paid by an indemnified party as a result of the losses, claims, damages
or liabilities referred to in the first sentence of this subsection (d) shall
be deemed to include any legal or other expenses reasonably incurred by such
indemnified party in connection with investigating or defending against any
action or claim which is the subject of this subsection (d). Notwithstanding
the provisions of this subsection (d), no Underwriter shall be required to
contribute any amount in excess of the amount by which the total price at
which the Purchased Securities underwritten by it and distributed to the
public were offered to the public exceeds the amount of any damages that such
Underwriter has otherwise been required to pay by reason of such untrue or
alleged untrue statement or omission or alleged omission. No person guilty of
fraudulent misrepresentation (within the meaning of Section 11(f) of the
Securities Act) shall be entitled to
 
                                      12
<PAGE>
 
contribution from any person who was not guilty of such fraudulent
misrepresentation. Each party entitled to contribution agrees that upon the
service of a summons or other initial legal process upon it in any action
instituted against it in respect of which contribution may be sought, it shall
promptly give written notice of such service to the party or parties from whom
contribution may be sought, but the omission so to notify such party or
parties of any such service shall not relieve the party from whom contribution
may be sought from any obligation it may have hereunder or otherwise.
 
  (e) The obligations of the Company under this Section 5 shall be in addition
to any liability which the Company may otherwise have, and shall extend, upon
the same terms and conditions, to each person, if any, who controls any
Underwriter within the meaning of the Securities Act and the Exchange Act; and
the obligations of the Underwriters under this Section 5 shall be in addition
to any liability that the respective Underwriters may otherwise have, and
shall extend, upon the same terms and conditions, to each director of the
Company (including any person who, with his or her consent, is named in the
Registration Statement as about to become a director of the Company), to each
officer of the Company who has signed the Registration Statement and to each
person, if any, who controls the Company within the meaning of the Securities
Act.
 
  6. EFFECTIVE DATE AND TERMINATION OF TERMS AGREEMENT. This Agreement shall
become effective (a) at 11:00 A.M., New York City time, on the first full
Business Day following the date of the Terms Agreement or (b) at such earlier
time after the date of the Terms Agreement as you shall first release the
Purchased Securities for sale to the public. You shall notify the Company
immediately after you have taken any action which causes this Agreement to
become effective. Until this Agreement is effective, it may be terminated by
the Company by giving notice as hereinafter provided to you or by you by
giving notice as hereinafter provided to the Company, except that the
provisions of Section 3(g) and Section 5 shall at all times be effective.
 
  Your obligations under any Terms Agreement may be terminated by you by
giving notice as hereinafter provided to the Company, if (i) the Company shall
have failed, refused or been unable, at or prior to the Closing Date to
perform any agreement on its part to be performed hereunder, (ii) any other
condition of the obligations of the Underwriters hereunder is not fulfilled,
(iii) trading in securities generally on the New York Stock Exchange ("NYSE")
or the American Stock Exchange or the over-the-counter market shall have been
suspended or minimum prices shall have been established on either of such
exchanges or such market by the Commission or by such exchange or other
regulatory body or governmental authority having jurisdiction, (iv) a general
banking moratorium shall have been declared by Federal or state authorities,
(v) the United States engages in hostilities or there is an escalation of
hostilities involving the United States or there is a declaration of war or
national emergency by the United States after the date hereof which, in your
judgment, makes it inadvisable or impracticable to proceed with the delivery
of the Purchased Securities, or (vi) there shall have been such a material
change in general economic, political or financial conditions or if the effect
of international conditions on the financial markets in the United States
shall be such as, in your judgment, makes it inadvisable or impracticable to
proceed with the delivery of the Purchased Securities. Any termination of this
Agreement pursuant to this Section 6 shall be without liability on the part of
the Company or the Underwriters except as otherwise provided in Sections 3(g)
and 5 hereof.
 
  Any notice referred to above may be given at the address specified in
Section 9 hereof in writing or by telegraph or telephone, and if by telegraph
or telephone, shall be immediately confirmed in writing.
 
  7. INCREASE IN UNDERWRITERS' COMMITMENTS. If any Underwriter shall default
in its obligation to take up and pay for the Purchased Securities to be
purchased by it under any Terms Agreement and if the principal amount of
Purchased Securities which all Underwriters so defaulting shall have so failed
to take up and pay for does not exceed 10% of the total principal amount of
Purchased Securities agreed to be purchased pursuant to such Terms Agreement,
the non-defaulting Underwriters shall take up and pay for (in addition to the
principal amount of Purchased Securities they are obligated to purchase
pursuant to such Terms Agreement) the principal amount of Purchased Securities
agreed to be purchased by all such defaulting Underwriters, as hereinafter
 
                                      13
<PAGE>
 
provided. Such Purchased Securities shall be taken up and paid for by such
non-defaulting Underwriter or Underwriters in such amount or amounts as you
may designate with the consent of each Underwriter so designated or, in the
event no such designation is made, such Purchased Securities shall be taken up
and paid for by all non-defaulting Underwriters pro rata in proportion to the
principal amount of Purchased Securities they have agreed to purchase under
such Terms Agreement.
 
  Without relieving any defaulting Underwriter from its obligations hereunder,
the Company agrees with the non-defaulting Underwriters that it will not sell
any Purchased Securities under any Terms Agreement unless all of the
Underwriters' Securities under any such Terms Agreement are purchased by the
Underwriters (or by substituted underwriters selected by you with the approval
of the Company or selected by the Company with your approval).
 
  If a new underwriter or underwriters are substituted by the Underwriters or
by the Company for a defaulting Underwriter or Underwriters in accordance with
the foregoing provision, the Company or you shall have the right to postpone
the Closing Date for a period not exceeding five full business days in order
that necessary changes in the Registration Statement and Prospectus and other
documents may be effected.
 
  The term Underwriter as used in this Agreement shall refer to and include
any underwriter substituted under this Section 7.
 
  8. SURVIVAL OF INDEMNITIES, CONTRIBUTIONS, WARRANTIES AND REPRESENTATIONS.
The indemnity and contribution agreements contained in Section 5 and the
representations, warranties and agreements of the Company in Sections 1 and 3
shall survive the delivery of the Purchased Securities to the Underwriters
hereunder and shall remain in full force and effect, regardless of any
termination or cancellation of this Agreement or any investigation made by or
on behalf of any indemnified party.
 
  9. NOTICES. Except as otherwise provided in this Agreement, (a) whenever
notice is required by the provisions of this Agreement to be given to the
Company, such notice shall be in writing addressed to the Company at The
Coastal Corporation, Coastal Tower, Nine Greenway Plaza, Houston, Texas 77046-
0995, Attention: Director--Financial Administration, with a copy to Austin M.
O'Toole, Esq.; and (b) whenever notice is required by the provisions of this
Agreement to be given to the Underwriters, such notice shall be in writing and
addressed to the Underwriters at their respective addresses furnished to the
Company in writing for the purpose of communications hereunder.
 
  10. INFORMATION FURNISHED BY UNDERWRITERS. The statements with respect to
the public offering of the Purchased Securities on the cover page of the
Prospectus Supplement covering the Purchased Securities and under the caption
"Plan of Distribution", if any in such Prospectus Supplement constitute the
only information furnished to the Company in writing on behalf of or by you
expressly for use in the Registration Statement, the Prospectus, or any
amendment or supplement thereto referred to in this Agreement.
 
  11. PARTIES. This Agreement shall inure to the benefit of and be binding
upon the Underwriters, the Company, any officer, director or controlling
person referred to in Section 5 hereof, and their respective successors and
assigns, and no other person shall acquire or have any right by virtue of this
Agreement. The term "successors and assigns", as used in this Agreement, shall
not include any purchaser of any of the Purchased Securities from the
Underwriters merely by reason of such purchase.
 
  12. DEFINITION OF "BUSINESS DAY" AND "SUBSIDIARY". For purposes of this
Agreement, (a) "Business Day" means any day on which the NYSE is open for
trading, and (b) "Subsidiary" has the meaning set forth in Rule 405 of the
Securities Act.
 
  13. GOVERNING LAW. THIS AGREEMENT SHALL BE GOVERNED BY AND CONSTRUED IN
ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK, WITHOUT GIVING EFFECT TO
THE CHOICE OF LAW OR CONFLICT OF LAWS PRINCIPLES THEREOF.
 
                                      14
<PAGE>
 
  14. COUNTERPART. This Agreement may be signed in one or more counterparts,
each of which shall constitute an original and all of which together shall
constitute one and the same agreement.
 
  Please confirm, by signing and returning to us four counterparts of this
Agreement, that the foregoing correctly sets forth the Agreement between you
and the Company.
 
                                          Very truly yours,
 
                                          THE COASTAL CORPORATION
 
                                          By: _________________________________
 
Confirmed and accepted as of
 the date first above mentioned:
[Lead Underwriters]
 
By:
 
By: _________________________________
 
                                       15
<PAGE>
 
                                   SCHEDULE A
                                       TO
                                TERMS AGREEMENT
 
<TABLE>
<CAPTION>
                                                                PRINCIPAL AMOUNT
                                                                  OF PURCHASED
                                NAME                               SECURITIES
                                ----                            ----------------
      <S>                                                       <C>
                                                                  $
                                                                  ------------
                                                                  ------------
          Total................................................   $
                                                                  ============
</TABLE>
<PAGE>
 
                                                                      EXHIBIT A
 
                                TERMS AGREEMENT
 
                             [TITLE OF SECURITIES]
 
                                                                         [Date]
 
The Coastal Corporation
Coastal Tower
Nine Greenway Plaza
Houston, Texas 77046-0995
 
Dear Sirs:
 
  The Coastal Corporation (the "Company") and [Lead Underwriters] [as
representatives of the underwriters named on Schedule A hereto] (the
"Underwriters") have entered into an Underwriting Agreement (the "Underwriting
Agreement"), dated        , relating to the issuance from time to time by the
Company of its [senior] [subordinated] unsecured debt securities under an
indenture (the "Indenture"), dated as of [ ], 1998, as amended from time to
time, between the Company and Harris Trust and Savings Bank, as Trustee. This
Terms Agreement, relating to the Purchased Securities referred to below, is
being entered into pursuant to the Underwriting Agreement. Capitalized terms
used herein, not otherwise defined, have the meanings given them in the
Underwriting Agreement, except for terms which are not used in the
Underwriting Agreement, which terms shall have the meanings given them in the
Indenture.
 
  The Underwriters understand that the Company proposes to issue and sell
$            aggregate principal amount of [Title of Securities] (the
"Purchased Securities"). Subject to the terms, conditions, representations and
warranties set forth or incorporated by reference herein, the Company agrees
to sell to the Underwriters and the Underwriters agree, severally but not
jointly, to purchase from the Company the Purchased Securities in the
respective principal amounts set forth next to their names in Schedule A
hereto, at      % of the principal amount thereof. The Prospectus Supplement
with respect to the Purchased Securities is dated         and includes the
Prospectus dated        .
 
  The Underwriters will pay for such Purchased Securities upon delivery
thereof in New York City at 10:00 A.M. (New York time) on         (the
"Closing Date") in New York Clearing House funds, or at such other time on the
Closing Date as shall be agreed upon by the Company and the Underwriters.
 
  The Purchased Securities shall have the following terms, in addition to
those set forth in the Indenture:
 
<TABLE>
   <S>                      <C>
   (a) Interest:                % per annum
   (b) Maturity:
   (c) Initial Public Of-         % of the principal amount of the Purchased
     fering Price:          Securities.
   (d) Interest Payment          and      of each year, commencing
      Dates:                     .
   (e) Redemption:
</TABLE>
 
  All provisions contained in the Underwriting Agreement are incorporated by
reference herein in their entirety and shall be deemed to be part of this
Agreement to the same extent as if such provisions had been set forth in full
herein.
 
                                       1
<PAGE>
 
  THIS AGREEMENT SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE
LAWS OF THE STATE OF NEW YORK, WITHOUT GIVING EFFECT TO THE CHOICE OF LAW OR
CONFLICT OF LAWS PRINCIPLES THEREOF.
 
  This instrument may be signed by the parties in counterparts which together
shall constitute one and the same agreement between the parties and shall
become effective at such time as each of the parties shall have signed such
counterparts and shall have notified the other party thereof.
 
  Please confirm your agreement herewith by having an authorized officer sign
a copy of this Agreement in the space provided below.
 
                                          Very truly yours,
 
                                          [Lead Underwriters]
 
                                          By:
 
                                          By: _________________________________
                                              Name:
                                              Title:
 
Accepted and Agreed to
as of the date first
above written
 
The Coastal Corporation
 
By: _________________________________
  Name:
  Title:
 
                                       2

<PAGE>
 
 
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------

                                                                     EXHIBIT 1.2
 
                            THE COASTAL CORPORATION
[LOGO APPEARS HERE]
                                      and
 
 
 
 
 
                             ---------------------
 
                             UNDERWRITING AGREEMENT
 
                                 DATED
 
                                      AND
 
                                TERMS AGREEMENT
 
                                 DATED
 
                             ---------------------
 
 
                          [TITLE OF EQUITY SECURITIES]
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
<PAGE>
 
                            THE COASTAL CORPORATION
 
                            UNDERWRITING AGREEMENT
 
                                                                         , 199
 
[Name and Address of Lead Underwriters]
 
Dear Sirs:
 
  The Coastal Corporation, a Delaware corporation (the "Company"), proposes to
issue and sell from time to time certain of its Preferred Stock, par value
$.33 1/3 per share (the "Preferred Stock"), Common Stock, par value $.33 1/3
per share (the "Common Stock") and/or Common Stock Warrants (the "Warrants")
referred to below (collectively, the "Securities") registered under the
registration statement referred to below. The Preferred Stock may be issued in
one or more series, may have varying dividend and liquidation preferences,
voting rights and redemption provisions, and may be convertible, as described
in the certificate of designations relating to such Preferred Stock (the
"Certificate of Designations"), into shares of the Common Stock. The Warrants
are to be issued pursuant to a Warrant Agreement dated as of [    ], 199  (the
"Warrant Agreement") between the Company and [    ] as Warrant Agent (the
"Warrant Agent"). The Securities may be sold to you, and to other firms on
whose behalf you may act, for resale in accordance with the terms of offering
determined at the time of sale. The Securities involved in any such offering
are hereinafter referred to as the "Purchased Securities", and the firm or
firms which agree to purchase the same are hereinafter referred to as the
"Underwriters" of such Purchased Securities and the representative or
representatives of the Underwriters, if any, specified in a "Terms Agreement"
are hereinafter referred to as the "Representatives"; provided, however, that
if the Terms Agreement does not specify any representative of the
Underwriters, the term "Representatives" as used in this Agreement shall mean
the Underwriters. The terms and conditions herein shall constitute a separate
agreement between the Company and the respective Underwriters in regard to
each offering of Purchased Securities.
 
  This Agreement shall not limit or affect the right of the Company to offer
or sell any of the Securities through any other underwriters or agents or
through any other arrangements specified by the Company from time to time, and
this Agreement shall apply only to Securities in respect of which a Terms
Agreement shall have been executed as referred to herein.
 
  This is to confirm the agreement concerning the purchase of the Securities
from the Company by the Underwriters.
 
  1. REPRESENTATIONS AND WARRANTIES. The Company represents and warrants to,
and agrees with each Underwriter that:
 
    (a) A registration statement on Form S-3 (File No. 333-     ), prepared
  by the Company in conformity with the requirements of the Securities Act of
  1933, as amended, and the rules and regulations promulgated thereunder
  (collectively, the "Securities Act"), has been filed with the Securities
  and Exchange Commission (the "Commission") and has become effective for the
  registration under the Securities Act of the Securities. Copies of such
  registration statement and any amendments thereto, and all forms of the
  related prospectuses relating to the Securities contained therein, have
  been delivered to each Underwriter. Such registration statement, including
  the documents incorporated by reference therein and all financial schedules
  and exhibits thereto, as amended at the date of any Terms Agreement, is
  herein referred to as the "Registration Statement". As used in this
  Agreement, the term "Prospectus" means such prospectus included in the
  Registration Statement, supplemented by a Prospectus Supplement as
  contemplated by Section 2 hereof to reflect the terms of the Purchased
  Securities and the plan of distribution thereof. Any reference herein to
  the Registration Statement or the Prospectus shall be deemed to refer to
 
                                       1
<PAGE>
 
  and include the documents incorporated by reference therein pursuant to
  Item 12 of Form S-3 under the Securities Act, as of the date of the
  Prospectus, and any reference herein to the terms "amend", "amendment" or
  "supplement" with respect to any Prospectus shall be deemed to refer to and
  include any documents filed with the Commission after such date under the
  Securities Exchange Act of 1934, as amended, and the rules and regulations
  of the Commission promulgated thereunder (collectively, the "Exchange
  Act"), and so incorporated by reference (all such incorporated documents
  being herein called the "Incorporated Documents").
 
    (b) As of the date of any Terms Agreement, when the Prospectus is first
  filed pursuant to Rule 424(b) under the Securities Act and when, prior to
  the Closing Date (as defined in Section 2 hereof), any amendment to the
  Registration Statement becomes effective (including the filing of any
  document incorporated by reference in the Registration Statement) and at
  the Closing Date, the Registration Statement and the Prospectus, as amended
  or supplemented, shall comply in all material respects with the
  requirements of the Securities Act. No such document shall contain any
  untrue statement of a material fact or omit to state a material fact
  required to be stated therein or necessary to make the statements therein
  not misleading, except that the foregoing shall not apply to statements in
  or omissions from any such document in reliance upon and in conformity with
  written information furnished to the Company by any Underwriter
  specifically for use in the preparation thereof. There is no contract or
  document required to be described in the Registration Statement or the
  Prospectus or required to be filed as an exhibit to the Registration
  Statement that is not described or filed as required.
 
    (c) Deloitte & Touche LLP, whose report is incorporated by reference in
  the Prospectus, are independent certified public accountants as required by
  the Securities Act. The financial statements and schedules (including the
  related notes) included or incorporated by reference in the Registration
  Statement and the Prospectus, present fairly, in all material respects, the
  financial condition, the results of operations and cash flows of the
  entities purported to be shown thereby at the dates and for the periods
  indicated and have been prepared in accordance with generally accepted
  accounting principles.
 
    (d) The Incorporated Documents, when they became effective or were filed
  with the Commission, as the case may be, complied in all material respects
  with the requirements of the Securities Act or the Exchange Act, as
  applicable, and any documents so filed and incorporated by reference
  subsequent to the date of the Prospectus shall, when they are filed with
  the Commission, conform in all material respects to the requirements of the
  Securities Act and the Exchange Act, as applicable.
 
    (e) Each of the Company and its Subsidiaries has been duly organized and
  is validly existing as a corporation in good standing under the laws of the
  jurisdiction of its incorporation, with full power and authority (corporate
  and other) to own or lease its properties and conduct its business as
  described in the Prospectus, and is duly qualified to do business and is in
  good standing in each jurisdiction in which the character of the business
  conducted by it or the location of the properties owned or leased by it
  makes such qualification necessary, except where the failure to so qualify
  would not have a material adverse effect on the Company and its
  Subsidiaries taken as a whole.
 
    (f) All of the outstanding capital stock or other equity securities of
  each of the Subsidiaries of the Company have been duly and validly
  authorized and issued, are fully paid and nonassessable, and are owned by
  the Company free and clear of any mortgage, pledge (other than any negative
  pledge agreement to which the Company or any of its Subsidiaries may be a
  party), security interest or restrictions on transferability or voting.
 
    (g) Since the date of the latest consolidated financial statements of the
  Company and its subsidiaries included in the Registration Statement and the
  Prospectus, there has not been any change in the Company's issued capital
  stock or options, except (I) as set forth in or expressly contemplated by
  the Registration Statement and the Prospectus, (II) pursuant to the
  exercise of options or the conversion, exchange or
 
                                       2
<PAGE>
 
  exercise of outstanding convertible, exchangeable or exercisable securities
  of the Company and (III) issuances of shares of Common Stock and options to
  acquire Common Stock issued after the date of such financial statements
  pursuant to the Company's employee benefit plans as in effect on the date
  hereof. Except as described in or contemplated by the Prospectus, there has
  not been any material adverse change in, or any adverse development which
  materially affects, the condition (financial or other), results of
  operation, business, prospects, net worth or assets of the Company and its
  Subsidiaries taken as a whole, from the date as of which information is
  given in the Prospectus.
 
    (h) Neither the Company nor any of its Subsidiaries is, nor with the
  giving of notice or lapse of time or both would be, in violation of or in
  default under, nor will the execution or delivery hereof or consummation of
  the transactions contemplated hereby result in a violation of, or
  constitute a default under, the certificate of incorporation, by-laws or
  other governing documents of the Company or any of its Subsidiaries, or any
  agreement, indenture or other instrument to which the Company or any of its
  Subsidiaries is a party or by which any of them is bound, or to which any
  of their properties is subject where the effect of such violation or
  default would have a material adverse effect on the Company and its
  Subsidiaries taken as a whole. The execution and delivery of this
  Agreement, the applicable Terms Agreement, the Warrant Agreement and any
  Delayed Delivery Contract (as defined in Section 2(c) hereof), the
  authorization, issuance and sale of the Purchased Securities, the
  fulfillment of this Agreement, the applicable Terms Agreement, the Warrant
  Agreement, the Certificate of Designations, the Purchased Securities and
  any Delayed Delivery Contract and the consummation of the transactions
  contemplated by each such agreement will not conflict with or constitute a
  breach of, or default (with the passage of time or otherwise) under, or
  result in the imposition of a lien on any properties of the Company or its
  Subsidiaries or an acceleration of indebtedness pursuant to, the
  certificate of incorporation or by-laws, or other governing documents of
  the Company or any of its Subsidiaries, or any bond, debenture, note or any
  other evidence of indebtedness or any indenture, mortgage, deed or trust or
  any other material agreement or instrument to which the Company or any of
  its Subsidiaries is a party or by which it or any of them is bound or to
  which any of the property or assets of the Company or any of its
  Subsidiaries is subject, or any law, administrative regulation or order of
  any court or governmental agency or authority applicable to the Company or
  any of its Subsidiaries. Except for the orders of the Commission declaring
  the Registration Statement effective under the Securities Act and permits
  and similar authorizations required under the securities or Blue Sky laws
  of certain jurisdictions, no consent, approval, authorization or order of
  any court, governmental agency or body or financial institution is required
  in connection with the consummation of the transactions contemplated by
  this Agreement or the applicable Terms Agreement, if applicable, the
  issuance of the Common Stock upon conversion, exchange or exercise of the
  Purchased Securities or the filing of the Certificate of Designation with
  the Secretary of State of the State of Delaware.
 
    (i) This Agreement and the applicable Terms Agreement have been duly
  authorized, executed and delivered by the Company and each constitutes the
  legal, valid and binding obligation of the Company.
 
    (j) As of the date of the Prospectus Supplement, the Company has the
  authorized, issued and outstanding capitalization set forth in the
  Prospectus under "Capitalization." The authorized capital stock of the
  Company conforms as to legal matters to the description thereof contained
  in the Registration Statement and the Prospectus, and all of the
  outstanding shares of capital stock of the Company have been duly
  authorized and validly issued, are fully paid and non-assessable and are
  not subject to any preemptive or similar rights.
 
    (k) All corporate action required to be taken for the authorization,
  issuance and sale of the Purchased Securities pursuant to this Agreement
  and the Terms Agreement has been validly and sufficiently taken. The
  Purchased Securities have been duly authorized for issuance and sale to the
  Underwriters pursuant to this Agreement and the Terms Agreement and, when
  issued and delivered by the Company pursuant to this Agreement and the
  Terms Agreement against payment of the consideration set forth in the Terms
  Agreement (and, with respect to the Warrants, executed and authenticated in
  accordance with the Warrant Agreement), the Purchased Securities will be
  validly issued and fully paid and nonassessable (or, with respect to the
  Warrants, legal, valid and binding obligations of the Company, enforceable
  in accordance with their terms); no holder thereof will be subject to
  personal liability solely by reason of being such a holder; the Purchased
 
                                       3
<PAGE>
 
  Securities will not be subject to the preemptive rights of any stockholder
  of the Company. If the Purchased Securities are convertible into, or
  exchangeable or exercisable for, Common Stock, the Purchased Securities are
  convertible into, or exchangeable or exercisable for, Common Stock in
  accordance with their terms and/or the terms of the Warrant Agreement or
  the Certificate of Designation.
 
    (l) If the Purchased Securities are convertible into or exchangeable or
  exercisable for Common Stock, the Common Stock issuable upon conversion,
  exchange or exercise of the Purchased Securities pursuant to the terms of
  the Warrant Agreement or the Certificate of Designations has been duly
  authorized and validly reserved for issuance upon such conversion, exchange
  or exercise by all necessary corporate action and such Common Stock, when
  duly issued upon such conversion, exchange or exercise, will be validly
  issued and fully paid and nonassessable; no holder thereof will be subject
  to personal liability solely by reason of being such a holder; and the
  issuance of such Common Stock upon such conversion, exchange or exercise
  will not be subject to preemptive rights.
 
    (m) The Warrant Agreement has been duly authorized and when executed and
  delivered by the Company will be the legal, valid and binding agreement of
  the Company enforceable in accordance with its terms, except that (i) the
  enforceability thereof may be subject to bankruptcy, insolvency,
  reorganization, moratorium or other similar laws now or hereafter in effect
  relating to creditors' rights generally, (ii) the remedy of specific
  performance and injunctive and other forms of equitable relief may be
  subject to equitable defenses and to the discretion of the court before
  which any proceedings therefor may be brought and (iii) the waiver as to
  usury may be unenforceable. The Warrant Agreement and the Warrants conform
  in all material respects to their description in the Prospectus.
 
    (n) The Delayed Delivery Contracts, if any, have been duly authorized and
  when executed and delivered by the Company will be the legal, valid and
  binding agreements of the Company enforceable in accordance with their
  terms, except that (i) the enforceability thereof may be subject to
  bankruptcy, insolvency, reorganization, moratorium or other similar laws
  now or hereafter in effect relating to creditors' rights generally and (ii)
  the remedy of specific performance and injunctive and other forms of
  equitable relief may be subject to equitable defenses and to the discretion
  of the court before which any proceedings therefor may be brought.
 
    (o) Subsequent to the respective dates as of which information is given
  in the Registration Statement and Prospectus and prior to the Closing Date,
  neither the Company nor any of its Subsidiaries has incurred or will have
  incurred any liabilities or obligations for borrowed money, direct or
  contingent, or entered into any transactions, not in the ordinary course of
  business and material to the business of the Company and its Subsidiaries
  taken as a whole, and there has not been and will not have been any
  material change in the capital stock or long-term indebtedness of the
  Company or any of its Subsidiaries, or any material adverse change in the
  business, prospects, financial position, net worth or assets or results of
  operations of the Company and its Subsidiaries taken as a whole.
 
    (p) The Company and its Subsidiaries have such interests in their
  respective real (including leasehold interests) and personal properties
  that they reasonably believe are necessary, in the aggregate, to use such
  properties in the manner presently used or proposed to be used by the
  Company and its Subsidiaries.
 
    (q) Except as described in the Prospectus, there is no litigation or
  governmental proceeding to which the Company or any of its Subsidiaries is
  a party or to which any property of the Company or any of its Subsidiaries
  is subject or which is pending or, to the knowledge of the Company,
  contemplated against the Company or any of its Subsidiaries which might
  result in any material adverse change in the condition (financial or
  other), results of operations, business, prospects, net worth or assets of
  the Company and its Subsidiaries taken as a whole.
 
    (r) Neither the Company nor any Subsidiary is in violation of any law,
  ordinance, governmental rule or regulation or court decree to which it may
  be subject which violation might have a material adverse effect on the
  condition (financial or other), results of operations, business, prospects,
  net worth or assets of the Company and its Subsidiaries taken as a whole.
 
    (s) The conditions for use of Form S-3, set forth in the General
  Instructions thereto, have been satisfied.
 
                                       4
<PAGE>
 
  2. PURCHASE AND OFFERING.
 
    (a) The obligations of the Underwriters to purchase the Purchased
  Securities will be evidenced by an exchange of telegraphic or other written
  communications substantially in the form attached as Exhibit A hereto (a
  "Terms Agreement") at each time the Company determines to sell Purchased
  Securities, with such other provisions which the Representatives and the
  Company shall agree upon. Each Terms Agreement shall specify the firms
  which will be Underwriters (who shall become bound by the terms hereof when
  the Terms Agreement has been entered into), the principal amount to be
  purchased by each Underwriter, the purchase price to be paid by the
  Underwriters and the terms of the Purchased Securities not already
  specified in the Warrant Agreement or the Certificate of Designations,
  including, but not limited to, dividend rates, maturities, redemption
  provisions and sinking fund requirements. Each Terms Agreement shall also
  specify the date of delivery and payment for the Purchased Securities other
  than any Contract Securities (as defined in Section 2(c) hereof) and any
  details of the terms of offering which should be reflected in the
  Prospectus Supplement relating to the offering of the Purchased Securities.
  Such Prospectus Supplement shall set forth the terms contained in the Terms
  Agreement and such other information that you and the Company agree at the
  time the Terms Agreement is entered into should be included in the
  Prospectus Supplement. Insofar as any provision of this Agreement is
  inconsistent with any provision of the applicable Terms Agreement, the
  Terms Agreement shall be deemed to control. Purchased Securities to be
  purchased by Underwriters are herein referred to as "Underwriters'
  Securities", and any Purchased Securities to be purchased pursuant to
  Delayed Delivery Contracts as hereinafter provided are herein referred to
  as "Contract Securities". The obligations of the Underwriters to purchase
  the Underwriters' Securities shall be several and not joint. It is
  understood that the Underwriters propose to offer the Purchased Securities
  for sale as set forth in such Prospectus Supplement.
 
    (b) Payment of the purchase price for the Underwriters' Securities shall
  be made to the Company or its order in New York Clearing House funds, by
  certified or official bank check, against delivery of the Underwriters'
  Securities to you for the respective accounts of the Underwriters;
  provided, however, that at the request of the Company, payment will be made
  in immediately available funds, in which case the Company will reimburse
  you for your cost of obtaining such funds. Such payment and delivery shall
  be made at 10:00 A.M. New York time on the date of delivery specified in
  the Terms Agreement (unless another time not later than 10:00 A.M. New York
  time on the fifth Business Day thereafter shall be agreed to by you and the
  Company or unless postponed in accordance with the provisions of Section 7
  hereof). The time and date that such payment and delivery are actually made
  is herein sometimes referred to as the "Closing Date". The Underwriters'
  Securities shall be delivered to you in definitive form, in temporary or
  final form, and in such names and denominations as you shall request at
  least one Business Day prior to the Closing Date by written notice to the
  Company. For the purpose of expediting the checking and packaging of the
  Underwriters' Securities by you, the Company agrees to make them available
  to you for such purpose before the close of business on the Business Day
  prior to the Closing Date.
 
    (c) If any Terms Agreement provides for sales of Purchased Securities
  pursuant to Delayed Delivery Contracts, the Company authorizes the
  Underwriters to solicit offers to purchase Contract Securities pursuant to
  Delayed Delivery Contracts substantially in the form of Schedule I attached
  hereto (the "Delayed Delivery Contracts") with such changes therein as the
  Company may approve. Delayed Delivery Contracts are to be with
  institutional investors, including commercial and savings banks, insurance
  companies, pension funds, investment companies and educational and
  charitable institutions. At the time of purchase the Company will pay you
  as compensation, for the accounts of the Underwriters, the compensation set
  forth in such Terms Agreement in respect of the principal amount of
  Contract Securities. The Underwriters will not have any responsibility in
  respect of the validity or the performance of Delayed Delivery Contracts.
  If the Company executes and delivers Delayed Delivery Contracts, the
  Contract Securities shall be deducted from the Purchased Securities to be
  purchased by the several Underwriters and the aggregate principal amount of
  Purchased Securities to be purchased by each Underwriter shall be reduced
  pro rata in proportion to the principal amount of Purchased Securities set
  forth opposite each Underwriter's name in such Terms Agreement, except to
  the extent that you determine that such reduction shall be otherwise
  allocated and so advise the Company.
 
                                       5
<PAGE>
 
  3. COVENANTS. The Company covenants and agrees with each Underwriter that
they will furnish to counsel for the Underwriters, without charge, one signed
copy of the Registration Statement, including all exhibits, in the form it
became effective and of all amendments thereto and that, in connection with
each offering of Securities:
 
    (a) The Company shall notify you promptly of any request by the
  Commission for any amendment of or supplement to the Registration Statement
  or the Prospectus, or for additional information; the Company shall prepare
  and file with the Commission, promptly upon your request, any amendments of
  or supplements to the Registration Statement or the Prospectus which, in
  your opinion after consultation with the Company, may be necessary or
  advisable in connection with the distribution of the Securities and the
  Company shall not file any amendment or supplement to the Registration
  Statement or the Prospectus or file any document under the Exchange Act
  before the termination of the offering of the Securities if such document
  would be deemed to be incorporated by reference therein which is not
  approved by you after reasonable notice thereof, such approval not to be
  unreasonably withheld or delayed. The Company shall notify you promptly of
  the filing with the Commission of the Prospectus supplemented by the
  Prospectus Supplement relating to the Purchased Securities. The Company
  shall advise you promptly of the issuance by the Commission or any State or
  other regulatory body of any stop order or other order suspending the
  effectiveness of the Registration Statement, suspending or preventing the
  use of the Prospectus, or suspending the qualification of the Securities
  for offering or sale in any jurisdiction, or of the institution of any
  proceedings for any such purpose; and the Company shall use its best
  efforts to prevent the issuance of any stop order or other such order and,
  should a stop order or other such order be issued, to obtain as soon as
  possible the lifting thereof.
 
    (b) The Company shall furnish to you, from time to time and without
  charge, copies of the Registration Statement of which each Representative
  shall receive a conformed copy and which shall include exhibits and all
  amendments and supplements to any of such documents (including any
  Incorporated Documents), in each case as soon as available and in such
  quantities as you may from time to time reasonably request.
 
    (c) If any event occurs as a result of which the Prospectus as then
  amended or supplemented would include an untrue statement of a material
  fact or omit to state a material fact necessary to make the statements
  therein, in the light of the circumstances under which they were made, not
  misleading, or if it is necessary to amend the Registration Statement or
  supplement the Prospectus to comply with the Securities Act, the Company
  shall promptly notify you and shall amend the Registration Statement or
  supplement the Prospectus or file such document (at the expense of the
  Company) so as to correct such statement or omission or effect such
  compliance.
 
    (d) The Company shall take or cause to be taken all necessary action and
  furnish to whomever you may direct such information as may be required in
  qualifying the Purchased Securities (and the Common Stock, if applicable)
  for sale under the laws of such jurisdictions as the Representative shall
  designate and to continue such qualifications in effect for as long as may
  be necessary for the distribution of the Purchased Securities (and the
  Common Stock, if applicable); except that in no event shall the Company be
  obligated in connection therewith to qualify as a foreign corporation, or
  to execute a general consent for service of process.
 
    (e) The Company shall make generally available to holders of the
  Purchased Securities, in the manner contemplated by Rule 158(b) under the
  Securities Act or otherwise, as soon as practicable after the date of the
  applicable Terms Agreement, but in any event not later than 45 days after
  the end of its fiscal quarter in which the first anniversary date of the
  date of the Terms Agreement occurs (or 90 days if such fiscal quarter is
  the last fiscal quarter of its fiscal year), an earnings statement
  satisfying the requirements of Section 11(a) of the Securities Act and
  covering a period of at least 12 consecutive months beginning after the
  effective date of the Registration Statement.
 
    (f) The Company shall apply the net proceeds of the sale of Purchased
  Securities as set forth in the Prospectus.
 
    (g) Whether or not this Agreement becomes effective or is terminated or
  the sale of the Purchased Securities to you is consummated, the Company
  shall pay or cause to be paid (A) all expenses (including
 
                                       6
<PAGE>
 
  transfer taxes) incurred in connection with the delivery to the
  Underwriters of the Purchased Securities, (B) all fees and expenses
  (including, without limitation, fees and expenses of the Company's
  accountants and counsel, but excluding fees and expenses of counsel to the
  Underwriters except as set forth in (C)) in connection with the
  preparation, printing, filing, delivery and shipping of the Registration
  Statement (including the financial statements therein and all amendments
  and exhibits thereto) and the Prospectus as amended or supplemented, and
  the printing, delivery and shipping of this Agreement, any Terms Agreement,
  any agreement among or between Underwriters and other underwriting
  documents, including the Blue Sky Survey and any legal investment survey,
  (C) all filing fees and fees and disbursements of counsel to the
  Underwriters incurred in connection with the qualification of the Purchased
  Securities (and the Common Stock, if applicable) under state securities
  laws as provided in Section 3(d) hereof, (D) the filing fee of the National
  Association of Securities Dealers, Inc., if any, (E) any applicable listing
  fees, (F) the cost of printing the Warrant Agreement and certificates
  representing the Purchased Securities, (G) the cost and charges of the
  Warrant Agent, (H) any fees payable to rating agencies in connection with
  the rating of the Purchased Securities and (I) all other costs and expenses
  incident to the performance of its obligations hereunder which are not
  otherwise provided for in this Section. It is understood however, that,
  except as provided in this Section 3(g), Section 5 and Section 6 hereof,
  each of the Underwriters shall pay all of its own costs and expenses
  including the fees of its counsel (except as set forth in (C) above) and
  any advertising expenses connected with any offers it may make. If the sale
  of the Purchased Securities provided for herein is not consummated by
  reason or acts of the Company pursuant to Section 6 hereof which prevent
  this Agreement or any Terms Agreement from becoming effective, or by reason
  of any failure, refusal or inability on the part of the Company to perform
  any agreement on its part to be performed or because any other condition of
  the Underwriters' obligations hereunder is not fulfilled, the Company shall
  reimburse each of the Underwriters for all reasonable out-of-pocket
  disbursements (including fees and disbursements of counsel) incurred by the
  Underwriters in connection with your investigation of or any preparation by
  them in respect of marketing the Purchased Securities or in contemplation
  of performing their respective obligations hereunder.
 
    (h) Prior to the Closing Date, the Company, at your request, shall
  furnish to you as soon as they have been prepared by the Company a copy of
  any unaudited interim consolidated financial statements of the Company and
  its Subsidiaries for any period subsequent to the period covered by the
  financial statements appearing in the Registration Statement and the
  Prospectus.
 
    (i) To use its best efforts to effect the listing of the Purchased
  Securities (including, if applicable, the shares of Common Stock issuable
  upon the conversion, exchange or exercise of the Purchased Securities) on
  the New York Stock Exchange on the date of the Terms Agreement.
 
    (j) To reserve and keep available at all times, free of preemptive
  rights, sufficient shares of Common Stock to satisfy any obligations to
  issue shares of Common Stock upon conversion, exchange or exercise of all
  of the Purchased Securities that are convertible into or exchangeable or
  exercisable for the Common Stock.
 
  4. CONDITIONS OF YOUR OBLIGATIONS. Your obligations are subject to the
accuracy, as of the date hereof and the Closing Date (as if made at such
Closing Date), of the representations and warranties of the Company contained
herein, to the performance by the Company of its obligations hereunder and to
the following additional conditions:
 
    (a) The Company shall have filed with the Commission on a timely basis
  pursuant to Rule 424(b) under the Securities Act, the Prospectus as
  supplemented by the Prospectus Supplement covering the Purchased
  Securities. No stop order suspending the effectiveness of the Registration
  Statement shall have been issued and no proceedings for that purpose shall
  be pending, threatened or contemplated by the Commission or any state
  securities or Blue Sky authority.
 
    (b) You shall not have advised the Company that the Registration
  Statement, any Prospectus, or any amendment or supplement thereto, contains
  an untrue statement of fact which, in your opinion, is material
 
                                       7
<PAGE>
 
  or omits to state a fact which, in your opinion, is material and is
  required to be stated therein or is necessary to make the statements
  therein not misleading.
 
    (c) You shall have received an opinion of Austin M. O'Toole, Esq., Senior
  Vice President and Secretary of the Company, dated the Closing Date and
  satisfactory to Cahill Gordon & Reindel, your counsel, to the effect that:
 
      (i) each of the Company and its Subsidiaries has been duly
    incorporated and is a validly existing corporation in good standing
    under the laws of its respective jurisdiction of incorporation with
    full corporate power and authority to own and occupy its properties and
    carry on its business as presently conducted and as described in the
    Prospectus, and the Company and each of its Subsidiaries is registered
    or qualified to conduct business and is in good standing in each
    jurisdiction in which, to the best of such counsel's knowledge, their
    failure to so register or qualify would have a material adverse effect
    on the Company and its Subsidiaries taken as a whole; all of the
    outstanding capital stock or other equity securities of each of the
    Subsidiaries of the Company have been duly and validly authorized and
    issued, are fully paid and nonassessable, and are owned by the Company
    free and clear of any mortgage, pledge (other than any negative pledge
    agreement to which the Company or any of its Subsidiaries may be a
    party), security interest or restrictions on transferability or voting,
    other than certain equity securities of Colorado Interstate Gas
    Company, which has outstanding capital stock held by entities not
    affiliated with the Company but which Subsidiary the Company, directly
    or indirectly, has control of its voting power and management, and
    other than the capital stock of the first tier subsidiaries of Coastal
    Natural Gas Company which has been pledged to secure certain
    borrowings;
 
      (ii) this Agreement, the Terms Agreement and the Warrant Agreement
    have been duly authorized, executed and delivered by the Company, and
    this Agreement, the Terms Agreement and the Warrant Agreement are
    legal, valid and binding agreements of the Company enforceable in
    accordance with their respective terms, except that (a) the
    enforceability hereof and thereof may be subject to bankruptcy,
    insolvency, reorganization, moratorium or other similar laws now or
    hereafter in effect relating to creditors' rights generally, (b) the
    remedy of specific performance and injunctive and other forms of
    equitable relief may be subject to equitable defenses and to the
    discretion of the court before which any proceedings therefor may be
    brought and (c) rights to indemnity and contribution hereunder may be
    limited by Federal and state securities laws or the policies underlying
    such laws;
 
      (iii) the Delayed Delivery Contracts, if any, have been duly
    authorized, executed and delivered by the Company and (assuming that
    they have been duly authorized, executed and delivered by the
    purchasers thereunder) are valid and binding agreements of the Company;
 
      (iv) to the best knowledge of such counsel, there are no legal or
    governmental proceedings pending or threatened to which the Company or
    any of its Subsidiaries is a party, or of which the business or
    properties of the Company or any of its Subsidiaries is the subject,
    which are required to be disclosed in the Registration Statement and
    the Prospectus and are not so disclosed and there is no contract or
    document concerning the Company or any of its Subsidiaries of a
    character required to be described in the Prospectus or to be filed as
    an exhibit to the Registration Statement which is not described or
    filed as required;
 
      (v) the execution and delivery of this Agreement, the Terms Agreement
    and any Delayed Delivery Contract, the authorization, issuance and sale
    of the Purchased Securities, the fulfillment of the terms of the
    Warrant Agreement, this Agreement, the Certificate of Designation, the
    Terms Agreement and any Delayed Delivery Contract, and the consummation
    of the transactions contemplated by the Warrant Agreement, this
    Agreement, the Certificate of Designation, the Terms Agreement and any
    Delayed Delivery Contract, will not conflict with or constitute a
    breach of, or default (with the passage of time or otherwise) under, or
    result in the imposition of a lien on any properties of the Company or
    its Subsidiaries or an acceleration of indebtedness pursuant to, the
    certificate of incorporation and by-laws, or other equivalent
    instruments of the Company or any of its Subsidiaries or, to the best
    of such counsel's knowledge, any bond, debenture, note or any other
    evidence of indebtedness or any
 
                                       8
<PAGE>
 
    indenture, mortgage, deed of trust, or any other material agreement or
    instrument to which the Company or any of its Subsidiaries is subject
    where such breach or default would have a material adverse effect on
    the Company and its Subsidiaries taken as a whole, or any law,
    administrative regulation or court or governmental agency or authority
    ruling or decree known to such counsel to be applicable to the Company
    or any of its Subsidiaries or any of their properties or assets; and
    all legally required proceedings in connection with the authorization,
    issuance and sale of the Purchased Securities in accordance with the
    terms of this Agreement, the Terms Agreement and the Warrant Agreement
    have been taken and, except for permits and similar authorizations
    required under the securities or Blue Sky laws of certain jurisdictions
    (as to which such counsel need express no opinion), all consents,
    approvals, authorizations or other orders of any regulatory body,
    administrative agency or other governmental body legally required for
    the valid issuance and sale of the Purchased Securities or any
    transactions contemplated hereunder, if applicable, the issuance of the
    Common Stock upon conversion, exchange or exercise of the Purchased
    Securities or the filing of the Certificate of Designation with the
    Secretary of State of the State of Delaware have been obtained;
 
      (vi) the Underwriters' Securities have been duly authorized and, with
    respect to the Warrants, when executed and authenticated in accordance
    with the terms of the Warrant Agreement and delivered to, and paid for
    by, you will be validly issued and fully paid and non-assessable or,
    with respect to the Warrants, legal, valid and binding obligations of
    the Company; the Contract Securities have been duly authorized and,
    with respect to the Warrants, when executed and authenticated in
    accordance with the terms of the Warrant Agreement and when issued and
    delivered against payment as provided in the Delayed Delivery
    Contracts, will be validly issued and fully paid and non-assessable or,
    with respect to the Warrants, legal, valid and binding obligations of
    the Company, enforceable in accordance with their terms;
 
      (vii) the Registration Statement has become effective under the
    Securities Act, and, to the best knowledge of such counsel, no stop
    order suspending the effectiveness of the Registration Statement has
    been issued and no proceedings for that purpose have been instituted or
    are pending or contemplated;
 
      (viii) the number of authorized shares of capital stock of the
    Company is as set forth in the Prospectus under "Capitalization" and
    the authorized capital stock of the Company conforms as to legal
    matters to the description thereof contained in the Prospectus.
 
      (ix) the Purchased Securities, the Delayed Delivery Contracts (if
    any) and the Warrant Agreement conform in all material respects to the
    descriptions thereof in the Prospectus;
 
      (x) except as to financial statements and schedules and other
    financial or statistical data included therein, and the exhibits
    thereto, as to which such counsel need not express any opinion, (a) the
    Registration Statement and the Prospectus and any supplements or
    amendments thereto comply as to form in all material respects with the
    Securities Act and (b) the Incorporated Documents comply as to form in
    all material respects with the requirements of the Exchange Act and, to
    the best knowledge of such counsel, no such Incorporated Document
    contains an untrue statement of a material fact or omits to state a
    material fact required to be stated therein or necessary to make the
    statements therein not misleading;
 
      (xi) the issuance of the Purchased Securities is not subject to
    preemptive rights arising by operation of law or under the charter or
    by-laws of the Company; and no holder of the Purchased Securities will
    be subject to personal liability solely by reason of being such a
    holder; and
 
      (xii) if the Purchased Securities are convertible into or
    exchangeable or exercisable for Common Stock, upon issuance and
    delivery of the Purchased Securities, the Purchased Securities shall be
    convertible, exchangeable or exercisable at the option of the holder
    thereof into or for Common Stock in accordance with the terms of the
    Purchased Securities and the Certificate of Designation or Warrant
    Agreement; the Common Stock issuable upon conversion, exchange or
    exercise of the Purchased Securities has been duly authorized and
    validly reserved for issuance upon such conversion, exchange
 
                                       9
<PAGE>
 
    or exercise by all necessary corporate action, and such Common Stock,
    when issued upon such conversion, exchange or exercise, will be validly
    issued, fully paid and non-assessable; no holder of the Common Stock
    will be subject to personal liability solely by reason of being such a
    holder; and the issuance of such shares upon such conversion, exchange
    or exercise will not be subject to preemptive rights arising by
    operation of law or under the charter or by-laws of the Company.
 
    In addition, such counsel shall state that such counsel has participated
  in conferences with officers and other representatives of the Company,
  representatives of the independent public accountants for the Company and
  you at which the contents of the Registration Statement and Prospectus and
  related matters were discussed and, although such counsel is not passing
  upon and does not assume any responsibility for the accuracy, completeness
  or fairness of the statements contained in the Registration Statement and
  Prospectus (except to the extent stated in paragraph (ix) above), on the
  basis of the foregoing (relying as to materiality to a large extent upon
  the opinions of officers and other representatives of the Company), no
  facts have come to the attention of such counsel that lead him to believe
  that either the Registration Statement or any amendment thereto at the time
  such Registration Statement or amendment became effective contained an
  untrue statement of a material fact or omitted to state a material fact
  required to be stated therein or necessary to make the statements therein
  not misleading or that the Prospectus as of its date or any supplement
  thereto as of its date, and as of the Closing Date, contained an untrue
  statement of a material fact or omitted to state a material fact necessary
  in order to make the statements therein, in the light of the circumstances
  under which they were made, not misleading (it being understood that such
  counsel need not comment as to the financial statements, schedules and
  other statistical and financial data included in the Registration Statement
  or Prospectus or the exhibits to the Registration Statement).
 
    (d) You shall have received on the Closing Date from Cahill Gordon &
  Reindel, your counsel, an opinion to the effect set forth in clauses (ii),
  (iii), (vi), (vii), (ix), (x)(a) (except with respect to the Incorporated
  Documents) and (x)(b) of Section 4(c) hereof. In addition, such counsel
  shall state that such counsel has participated in conferences with officers
  and other representatives of the Company, counsel for the Company,
  representatives of the independent public accountants for the Company and
  your representatives at which the contents of the Registration Statement
  and Prospectus and related matters were discussed and, although such
  counsel is not passing upon and does not assume any responsibility for the
  accuracy, completeness or fairness of the statements contained in the
  Registration Statement and Prospectus (except to the extent provided in
  paragraph (ix) of Section 4(c) hereof), on the basis of the foregoing
  (relying as to materiality to a large extent upon the opinions of officers
  and other representatives of the Company), no facts have come to the
  attention of such counsel that lead them to believe that either the
  Registration Statement or any amendment thereto at the time such
  Registration Statement or amendment became effective contained an untrue
  statement of a material fact or omitted to state a material fact required
  to be stated therein or necessary to make the statements therein not
  misleading or that the Prospectus as of its date or any supplement thereto
  as of its date contained an untrue statement of a material fact or omitted
  to state a material fact necessary in order the make the statements
  therein, in the light of the circumstances under which they were made, not
  misleading (it being understood that such counsel need express no comment
  with respect to the financial statements, schedules and other financial or
  statistical data included or incorporated by reference in the Registration
  Statement or Prospectus or the exhibits to the Registration Statement).
 
    (e) There shall have been furnished to you a certificate, dated the
  Closing Date and addressed to you, signed by the President, or any Vice
  President and the Chief Financial Officer, any financial Vice President or
  the Treasurer of the Company to the effect that: (i) the representations
  and warranties of the Company contained in this Agreement are true and
  correct, as if made at and as of the Closing Date, and the Company has
  complied with all the agreements and satisfied all the conditions on its
  part to be performed or satisfied at or prior to the Closing Date; (ii) no
  stop order suspending the effectiveness of the Registration Statement has
  been issued, and no proceedings for that purpose have been initiated or
  threatened; (iii) all filings required by Rule 424 of the Securities Act
  have been made; (iv) the signers of said certificate have carefully
  examined the Registration Statement and the Prospectus, and any amendments
  or supplements thereto
 
                                      10
<PAGE>
 
  (including any documents filed under the Exchange Act and deemed to be
  incorporated by reference therein), and such documents contain all
  statements and information required to be included therein, and do not
  include any untrue statement of a material fact or omit to state any
  material fact required to be stated therein or necessary to make the
  statements therein not misleading; and (v) since the execution of the Terms
  Agreement, there has occurred no event required to be set forth in an
  amendment or supplement to the Registration Statement or the Prospectus
  which has not been so set forth; and there has been no document required to
  be filed under the Exchange Act that upon such filing would be deemed to be
  incorporated by reference into the Prospectus that has not been so filed.
 
    (f) Since the execution of the Terms Agreement, neither the Company nor
  any of its Subsidiaries shall have sustained any loss by fire, flood,
  accident or other calamity, or shall have become a party to or be subject
  to any litigation, which is material to the Company and its Subsidiaries
  taken as a whole, nor shall there have been a material adverse change in
  the general affairs, business, key personnel, capitalization, financial
  position or net worth of the Company and its Subsidiaries taken as a whole,
  whether or not arising in the ordinary course of business, which loss,
  litigation or change, in your judgment, shall render it inadvisable to
  proceed with the delivery of the Purchased Securities.
 
    (g) On the date of execution of the Terms Agreement and the Closing Date
  you shall have received a letter of Deloitte & Touche LLP, dated the date
  of execution of the Terms Agreement and the Closing Date, as the case may
  be, and addressed to you, confirming that they are independent certified
  public accountants, within the meaning of the Securities Act, and stating,
  as of the date of such letter (or, with respect to matters involving
  changes or developments since the respective dates as of which specified
  financial information is given or incorporated in the Prospectus, and a
  date not more than five days prior to the date of such letter), the
  conclusions and findings of such firm with respect to the financial
  information and other matters requested to be covered by its letter
  delivered to you concurrently with the execution of the Terms Agreement
  and, with respect to the letter delivered on the Closing Date, confirming
  the conclusions and findings set forth in such prior letter.
 
    (h) That the Company shall have accepted Delayed Delivery Contracts in
  any case where sales of Contract Securities arranged by the Underwriters
  have been approved by the Company.
 
    (i) You shall have been furnished with such additional documents and
  certificates as you may reasonably request.
 
    All such opinions, certificates, letters and documents shall be in
  compliance with the provisions hereof only if they are reasonably
  satisfactory in form and substance to you and to counsel for the
  Underwriters. The Company shall furnish to you such conformed copies of
  such opinions, certificates, letters and other documents as you shall
  reasonably request. If any of the conditions specified in this Section 4
  shall not have been fulfilled when and as required by this Agreement, this
  Agreement and the applicable Terms Agreement and all obligations of the
  Underwriters hereunder and thereunder may be cancelled at, or at any time
  prior to, the Closing Date, by you. Any such cancellation shall be without
  liability of the Underwriters to the Company. Notice of such cancellation
  shall be given to the Company in writing, or by telegraph or telephone and
  confirmed in writing.
 
  5. INDEMNIFICATION AND CONTRIBUTION. (a) The Company shall indemnify and
hold harmless each of the Underwriters against any loss, claim, damage or
liability to which the Underwriters may become subject, under the Securities
Act or otherwise, insofar as such loss, claim, damage or liability (or action
in respect thereof) arises out of or is based upon (i) any untrue statement or
alleged untrue statement made by the Company in Section 1 hereof, or (ii) any
untrue statement or alleged untrue statement of a material fact contained (A)
in the Registration Statement or the Prospectus or any amendment or supplement
thereto, or (B) in any Blue Sky application or other document executed by the
Company specifically for the purpose or based upon any written information
furnished by the Company filed in any state or other jurisdiction in order to
qualify any or all of the Purchased Securities under the securities laws
thereof (any such application, document or information being hereinafter
called "Blue Sky Information"), or (iii) the omission or alleged omission to
state in the Registration Statement
 
                                      11
<PAGE>
 
or the Prospectus or any amendment or supplement thereto or in any Blue Sky
Information a material fact required to be stated therein or necessary to make
the statements therein not misleading; and shall reimburse each of the
Underwriters for any legal or other reasonable expenses as incurred by the
Underwriters in connection with investigating or defending against or
appearing as a third-party witness in connection with any such loss, claim,
damage, liability or action, notwithstanding the possibility that payments for
such expenses might later be held to be improper, in which case the person
receiving them shall promptly refund them; provided, however, that the Company
shall not be liable to an Underwriter in any such case to the extent, but only
to the extent, that any such loss, claim, damage or liability arises out of or
is based upon an untrue statement or alleged untrue statement or omission or
alleged omission made in reliance upon and in conformity with written
information furnished to the Company by such Underwriter specifically for use
in the preparation of the Registration Statement, Prospectus or any amendment
or supplement thereto, or any Blue Sky Information.
 
  (b) Each of the Underwriters, severally but not jointly, shall indemnify and
hold harmless the Company against any loss, claim, damage or liability to
which the Company may become subject, under the Securities Act or otherwise,
insofar as such loss, claim, damage or liability (or action in respect
thereof) arises out of or is based upon (i) any untrue statement or alleged
untrue statement of a material fact contained (A) in the Registration
Statement or the Prospectus or any amendment or supplement thereto, or (B) in
any Blue Sky Information, or (ii) the omission or alleged omission to state in
the Registration Statement or the Prospectus or any amendment or supplement
thereto or in any Blue Sky Information a material fact required to be stated
therein or necessary to make the statements therein not misleading; and shall
reimburse any legal or other expenses reasonably incurred by the Company in
connection with investigating or defending against any such loss, claim,
damage, liability or action, notwithstanding the possibility that payments for
such expenses might later be held to be improper, in which case the Company
shall promptly refund them; provided, however, that such indemnification and
expense reimbursement shall be available from an Underwriter to the extent,
but only to the extent, that such untrue statement or alleged untrue statement
or omission or alleged omission was made in reliance upon and in conformity
with written information furnished to the Company by such Underwriter
specifically for use in the preparation thereof.
 
  (c) Promptly after receipt by an indemnified party under subsection (a) or
(b) above of notice of any claim or the commencement of any action, the
indemnified party shall, if a claim in respect thereof is to be made against
the indemnifying party under such subsection, notify the indemnifying party in
writing of the claim or the commencement of that action; provided, however,
that the failure to notify the indemnifying party shall not relieve it from
any liability which it may have to an indemnified party otherwise than under
such subsection. If any such claim or action shall be brought against an
indemnified party, and it shall notify the indemnifying party thereof, the
indemnifying party shall be entitled to participate therein and, to the extent
that it wishes, jointly with any other similarly notified indemnifying party,
to assume the defense thereof with counsel reasonably satisfactory to the
indemnified party. After notice from the indemnifying party to the indemnified
party of its election to assume the defense of such claim or action, the
indemnifying party shall not be liable to the indemnified party under such
subsection for any legal or other expenses subsequently incurred by the
indemnified party in connection with the defense thereof other than reasonable
costs of investigation; except that you shall have the right to employ counsel
to represent you in connection with any claim in respect of which indemnity
may be sought by the Underwriters against the Company under such subsection
if, in your reasonable judgment, it is advisable for you to be represented by
separate counsel, and in that event the reasonable fees and expenses of such
separate counsel shall be paid by the Company.
 
  (d) If the indemnification provided for in this Section 5 is unavailable or
insufficient to hold harmless an indemnified party under subsection (a) or (b)
above, then each indemnifying party shall contribute to the amount paid or
payable by such indemnified party as a result of the losses, claims, damages
or liabilities referred to in subsection (a) or (b) above (i) in such
proportion as is appropriate to reflect the relative benefits received by the
Company on the one hand and the Underwriters on the other hand from the
offering of the Purchased Securities or (ii) if the allocation provided by
clause (i) above is not permitted by applicable law, in such proportion as is
appropriate to reflect not only the relative benefits referred to in clause
(i) above but also the relative fault of the
 
                                      12
<PAGE>
 
Company on the one hand and the Underwriters on the other in connection with
the statements or omissions that resulted in such losses, claims, damages or
liabilities, as well as any other relevant equitable considerations. The
relative benefits received by the Company on the one hand and the Underwriters
on the other shall be deemed to be in the same proportion as the total net
proceeds from the offering of the Purchased Securities (before deducting
expenses) received by the Company bear to the total underwriting discounts and
commissions received by the Underwriters as set forth in the Prospectus
Supplement covering the Purchased Securities. Relative fault shall be
determined by reference to, among other things, whether the untrue or alleged
untrue statement of a material fact or the omission or alleged omission to
state a material fact relates to information supplied by the Company or the
Underwriters and the parties' relative intent, knowledge, access to
information and opportunity to correct or prevent such untrue statement or
omission. The Company and the Underwriters agree that it would not be just and
equitable if contribution pursuant to this subsection (d) were to be
determined by pro rata allocation or by any other method of allocation which
does not take into account the equitable considerations referred to in the
first sentence of this subsection (d). The amount paid by an indemnified party
as a result of the losses, claims, damages or liabilities referred to in the
first sentence of this subsection (d) shall be deemed to include any legal or
other expenses reasonably incurred by such indemnified party in connection
with investigating or defending against any action or claim which is the
subject of this subsection (d). Notwithstanding the provisions of this
subsection (d), no Underwriter shall be required to contribute any amount in
excess of the amount by which the total price at which the Purchased
Securities underwritten by it and distributed to the public were offered to
the public exceeds the amount of any damages that such Underwriter has
otherwise been required to pay by reason of such untrue or alleged untrue
statement or omission or alleged omission. No person guilty of fraudulent
misrepresentation (within the meaning of Section 11(f) of the Securities Act)
shall be entitled to contribution from any person who was not guilty of such
fraudulent misrepresentation. Each party entitled to contribution agrees that
upon the service of a summons or other initial legal process upon it in any
action instituted against it in respect of which contribution may be sought,
it shall promptly give written notice of such service to the party or parties
from whom contribution may be sought, but the omission so to notify such party
or parties of any such service shall not relieve the party from whom
contribution may be sought from any obligation it may have hereunder or
otherwise.
 
  (e) The obligations of the Company under this Section 5 shall be in addition
to any liability which the Company may otherwise have, and shall extend, upon
the same terms and conditions, to each person, if any, who controls any
Underwriter within the meaning of the Securities Act and the Exchange Act; and
the obligations of the Underwriters under this Section 5 shall be in addition
to any liability that the respective Underwriters may otherwise have, and
shall extend, upon the same terms and conditions, to each director of the
Company (including any person who, with his or her consent, is named in the
Registration Statement as about to become a director of the Company), to each
officer of the Company who has signed the Registration Statement and to each
person, if any, who controls the Company within the meaning of the Securities
Act.
 
  6. EFFECTIVE DATE AND TERMINATION OF TERMS AGREEMENT. This Agreement shall
become effective (a) at 11:00 A.M., New York City time, on the first full
Business Day following the date of the Terms Agreement or (b) at such earlier
time after the date of the Terms Agreement as you shall first release the
Purchased Securities for sale to the public. You shall notify the Company
immediately after you have taken any action which causes this Agreement to
become effective. Until this Agreement is effective, it may be terminated by
the Company by giving notice as hereinafter provided to you or by you by
giving notice as hereinafter provided to the Company, except that the
provisions of Section 3(g) and Section 5 shall at all times be effective.
 
  Your obligations under any Terms Agreement may be terminated by you by
giving notice as hereinafter provided to the Company, if (i) the Company shall
have failed, refused or been unable, at or prior to the Closing Date to
perform any agreement on its part to be performed hereunder, (ii) any other
condition of the obligations of the Underwriters hereunder is not fulfilled,
(iii) trading in securities generally on the New York Stock Exchange ("NYSE")
or the American Stock Exchange or the over-the-counter market shall have been
suspended or minimum prices shall have been established on either of such
exchanges or such market by the Commission or by such exchange or other
regulatory body or governmental authority having jurisdiction, (iv) a general
 
                                      13
<PAGE>
 
banking moratorium shall have been declared by Federal or state authorities,
(v) the United States engages in hostilities or there is an escalation of
hostilities involving the United States or there is a declaration of war or
national emergency by the United States after the date hereof which, in your
judgment, makes it inadvisable or impracticable to proceed with the delivery
of the Purchased Securities, or (vi) there shall have been such a material
change in general economic, political or financial conditions or if the effect
of international conditions on the financial markets in the United States
shall be such as, in your judgment, makes it inadvisable or impracticable to
proceed with the delivery of the Purchased Securities. Any termination of this
Agreement pursuant to this Section 6 shall be without liability on the part of
the Company or the Underwriters except as otherwise provided in Sections 3(g)
and 5 hereof.
 
  Any notice referred to above may be given at the address specified in
Section 9 hereof in writing or by telegraph or telephone, and if by telegraph
or telephone, shall be immediately confirmed in writing.
 
  7. INCREASE IN UNDERWRITERS' COMMITMENTS. If any Underwriter shall default
in its obligation to take up and pay for the Purchased Securities to be
purchased by it under any Terms Agreement and if the number of Purchased
Securities which all Underwriters so defaulting shall have so failed to take
up and pay for does not exceed 10% of the total number of Purchased Securities
agreed to be purchased pursuant to such Terms Agreement, the non-defaulting
Underwriters shall take up and pay for (in addition to the number of Purchased
Securities they are obligated to purchase pursuant to such Terms Agreement)
the number of Purchased Securities agreed to be purchased by all such
defaulting Underwriters, as hereinafter provided. Such Purchased Securities
shall be taken up and paid for by such non-defaulting Underwriter or
Underwriters in such amount or amounts as you may designate with the consent
of each Underwriter so designated or, in the event no such designation is
made, such Purchased Securities shall be taken up and paid for by all non-
defaulting Underwriters pro rata in proportion to the number of Purchased
Securities they have agreed to purchase under such Terms Agreement.
 
  Without relieving any defaulting Underwriter from its obligations hereunder,
the Company agrees with the non-defaulting Underwriters that it will not sell
any Purchased Securities under any Terms Agreement unless all of the
Underwriters' Securities under any such Terms Agreement are purchased by the
Underwriters (or by substituted underwriters selected by you with the approval
of the Company or selected by the Company with your approval).
 
  If a new underwriter or underwriters are substituted by the Underwriters or
by the Company for a defaulting Underwriter or Underwriters in accordance with
the foregoing provision, the Company or you shall have the right to postpone
the Closing Date for a period not exceeding five full business days in order
that necessary changes in the Registration Statement and Prospectus and other
documents may be effected.
 
  The term Underwriter as used in this Agreement shall refer to and include
any underwriter substituted under this Section 7.
 
  8. SURVIVAL OF INDEMNITIES, CONTRIBUTIONS, WARRANTIES AND REPRESENTATIONS.
The indemnity and contribution agreements contained in Section 5 and the
representations, warranties and agreements of the Company in Sections 1 and 3
shall survive the delivery of the Purchased Securities to the Underwriters
hereunder and shall remain in full force and effect, regardless of any
termination or cancellation of this Agreement or any investigation made by or
on behalf of any indemnified party.
 
  9. NOTICES. Except as otherwise provided in this Agreement, (a) whenever
notice is required by the provisions of this Agreement to be given to the
Company, such notice shall be in writing addressed to the Company at The
Coastal Corporation, Coastal Tower, Nine Greenway Plaza, Houston, Texas 77046-
0995, Attention: Director--Financial Administration, with a copy to Austin M.
O'Toole, Esq.; and (b) whenever notice is required by the provisions of this
Agreement to be given to the Underwriters, such notice shall be in writing and
addressed to the Underwriters at their respective addresses furnished to the
Company in writing for the purpose of communications hereunder.
 
                                      14
<PAGE>
 
  10. INFORMATION FURNISHED BY UNDERWRITERS. The statements with respect to
the public offering of the Purchased Securities on the cover page of the
Prospectus Supplement covering the Purchased Securities and under the caption
"Plan of Distribution", if any in such Prospectus Supplement constitute the
only information furnished to the Company in writing on behalf of or by you
expressly for use in the Registration Statement, the Prospectus, or any
amendment or supplement thereto referred to in this Agreement.
 
  11. PARTIES. This Agreement shall inure to the benefit of and be binding
upon the Underwriters, the Company, any officer, director or controlling
person referred to in Section 5 hereof, and their respective successors and
assigns, and no other person shall acquire or have any right by virtue of this
Agreement. The term "successors and assigns", as used in this Agreement, shall
not include any purchaser of any of the Purchased Securities from the
Underwriters merely by reason of such purchase.
 
  12. DEFINITION OF "BUSINESS DAY" AND "SUBSIDIARY". For purposes of this
Agreement, (a) "Business Day" means any day on which the NYSE is open for
trading, and (b) "Subsidiary" has the meaning set forth in Rule 405 of the
Securities Act.
 
  13. GOVERNING LAW. THIS AGREEMENT SHALL BE GOVERNED BY AND CONSTRUED IN
ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK, WITHOUT GIVING EFFECT TO
THE CHOICE OF LAW OR CONFLICT OF LAWS PRINCIPLES THEREOF.
 
  14. COUNTERPART. This Agreement may be signed in one or more counterparts,
each of which shall constitute an original and all of which together shall
constitute one and the same agreement.
 
  Please confirm, by signing and returning to us four counterparts of this
Agreement, that the foregoing correctly sets forth the Agreement between you
and the Company.
 
                                          Very truly yours,
 
                                          THE COASTAL CORPORATION
 
                                          By: _________________________________
 
Confirmed and accepted as of
 the date first above mentioned:
[Lead Underwriters]
 
By:
 
By: _________________________________
 
                                      15
<PAGE>
 
                                   SCHEDULE A
                                       TO
                                TERMS AGREEMENT
 
<TABLE>
<CAPTION>
                                                                       NUMBER
                                                                         OF
                                                                      PURCHASED
                                   NAME                              SECURITIES
                                   ----                              -----------
      <S>                                                            <C>
                                                                     -----------
          Total.....................................................
                                                                     ===========
</TABLE>
<PAGE>
 
                                                                      EXHIBIT A
 
                                TERMS AGREEMENT
 
                             [TITLE OF SECURITIES]
 
                                                                         [Date]
 
The Coastal Corporation
Coastal Tower
Nine Greenway Plaza
Houston, Texas 77046-0995
 
Dear Sirs:
 
  The Coastal Corporation (the "Company") and [Lead Underwriters] [as
representatives of the underwriters named in Schedule A hereto] (the
"Underwriters") have entered into an Underwriting Agreement (the "Underwriting
Agreement"), dated        , relating to the issuance from time to time by the
Company of its [Title of Securities]. This Terms Agreement, relating to the
Purchased Securities referred to below, is being entered into pursuant to the
Underwriting Agreement. Capitalized terms used herein, not otherwise defined,
have the meanings given them in the Underwriting Agreement.
 
  The Underwriters understand that the Company proposes to issue and sell
[    ] of [Title of Securities] (the "Purchased Securities"). Subject to the
terms, conditions, representations and warranties set forth or incorporated by
reference herein, the Company agrees to sell to the Underwriters and the
Underwriters agree, severally but not jointly, to purchase from the Company
the Purchased Securities in the respective numbers set forth next to their
names in Schedule A hereto, at [      ]. The Prospectus Supplement with
respect to the Purchased Securities is dated         and includes the
Prospectus dated        .
 
  The Underwriters will pay for such Purchased Securities upon delivery
thereof in New York City at 10:00 A.M. (New York time) on         (the
"Closing Date") in New York Clearing House funds, or at such other time on the
Closing Date as shall be agreed upon by the Company and the Underwriters.
 
  The Purchased Securities shall have the following terms, in addition to
those set forth in the governing documents:
 
<TABLE>
   <S>                      <C>
   (a) Dividends:               % per annum
   (b) Conversion:
   (c) Initial Public 
       Offering Price:
   (d) Dividend Payment  
       Dates:          and      of each year, commencing        .
   (e) Redemption:
   (f) Exercise Price:
</TABLE>
 
  All provisions contained in the Underwriting Agreement are incorporated by
reference herein in their entirety and shall be deemed to be part of this
Agreement to the same extent as if such provisions had been set forth in full
herein.
 
                                       1
<PAGE>
 
  THIS AGREEMENT SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE
LAWS OF THE STATE OF NEW YORK, WITHOUT GIVING EFFECT TO THE CHOICE OF LAW OR
CONFLICT OF LAWS PRINCIPLES THEREOF.
 
  This instrument may be signed by the parties in counterparts which together
shall constitute one and the same agreement between the parties and shall
become effective at such time as each of the parties shall have signed such
counterparts and shall have notified the other party thereof.
 
  Please confirm your agreement herewith by having an authorized officer sign
a copy of this Agreement in the space provided below.
 
                                          Very truly yours,
 
                                          [Lead Underwriters]
 
                                          By:
 
                                          By: _________________________________
                                              Name:
                                              Title:
 
Accepted and Agreed to
as of the date first
above written
 
The Coastal Corporation
 
By: _________________________________
  Name:
  Title:
 
                                       2

<PAGE>
 
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------

                                                                     EXHIBIT 4.1
                               THE COASTAL CORPORATION
[LOGO OF COASTAL                         AND
CORP. APPEARS HERE]     HARRIS TRUST AND SAVINGS BANK, TRUSTEE
                                 --------------------
                                       INDENTURE
                               DATED AS OF       , 199
                                 --------------------
                                SENIOR DEBT SECURITIES
 
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
<PAGE>
 
                             CROSS-REFERENCE TABLE
 
<TABLE>
<CAPTION>
                                                                   INDENTURE
 TIA SECTION                                                        SECTION
 -----------                                                       ---------
 <C>         <S>                                               <C>
 Section 310 (a)(1)..........................................  7.10
             (a)(2)..........................................  7.10
             (a)(3)..........................................  N.A.
             (a)(4)..........................................  N.A.
             (a)(5)..........................................  7.08
             (b).............................................  7.08; 7.10; 10.02
             (c).............................................  N.A.
 Section 311 (a).............................................  7.11
             (b).............................................  7.11
             (c).............................................  N.A.
 Section 312 (a).............................................  2.06
             (b).............................................  10.03
             (c).............................................  10.03
 Section 313 (a).............................................  7.06
             (b)(1)..........................................  N.A.
             (b)(2)..........................................  7.06
             (c).............................................  7.06; 10.02
             (d).............................................  7.06
 Section 314 (a).............................................  4.06; 10.02
             (b).............................................  N.A.
             (c)(1)..........................................  10.04
             (c)(2)..........................................  10.04
             (c)(3)..........................................  N.A.
             (d).............................................  N.A.
             (e).............................................  10.05
             (f).............................................  N.A.
 Section 315 (a).............................................  7.01(b)
             (b).............................................  7.05; 10.02
             (c).............................................  7.01(a)
             (d).............................................  7.01(c)
             (e).............................................  6.11
 Section 316 (a)(last sentence)..............................  2.10
             (a)(1)(A).......................................  6.05
             (a)(1)(B).......................................  6.04
             (a)(2)..........................................  N.A.
             (b).............................................  6.07
             (c).............................................  9.04
 Section 317 (a)(1)..........................................  6.08
             (a)(2)..........................................  6.09
             (b).............................................  2.05
 Section 318 (a).............................................  10.01
</TABLE>
- ---------
N.A. means Not Applicable.
NOTE:  This Cross-Reference Table shall not, for any purpose, be deemed to be
       a part of this Indenture.
<PAGE>

                                       i
 

                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                                                            PAGE
                                                                            ----
 <C>             <S>                                                        <C>
 Recitals of the Company...................................................   1
 
                                   ARTICLE 1
 
                   Definitions and Incorporation by Reference
 
 Section   1.01. Definitions..............................................    1
 Section   1.02. Incorporation by Reference of Trust Indenture Act........    8
 Section   1.03. Rules of Construction....................................    8
 
                                   ARTICLE 2
 
                                 The Securities
 
 Section   2.01. Form of Securities.......................................    9
 Section   2.02. Title and Terms..........................................   10
 Section   2.03. Execution and Authentication.............................   12
 Section   2.04. Registrar and Paying Agent...............................   15
 Section   2.05. Paying Agent to Hold Money in Trust......................   15
 Section   2.06. Securityholder Lists.....................................   15
 Section   2.07. Transfer and Exchange....................................   16
 Section   2.08. Replacement Securities...................................   18
 Section   2.09. Outstanding Securities...................................   18
 Section   2.10. Treasury Securities......................................   19
 Section   2.11. Temporary Securities.....................................   19
 Section   2.12. Cancellation.............................................   20
 Section   2.13. Defaulted Interest.......................................   20
 Section   2.14. Persons Deemed Owners....................................   20
 
                                   ARTICLE 3A
 
                                   Redemption
 
 Section  3A.01. Right of Redemption......................................   21
 Section  3A.02. Applicability of Article.................................   21
 Section  3A.03. Election to Redeem; Notice to Trustee....................   21
 Section  3A.04. Selection by Trustee of Securities to be Redeemed........   21
 Section  3A.05. Notice of Redemption.....................................   22
 Section  3A.06. Deposit of Redemption Price..............................   23
 Section  3A.07. Securities Payable on Redemption Date....................   23
 Section  3A.08. Securities Redeemed in Part..............................   23
</TABLE>
 
<PAGE>
 
 
                                       ii
 
                                   ARTICLE 3B
 
                                  Sinking Fund
 
<TABLE>
<CAPTION>
                                                                            PAGE
                                                                            ----
 <C>             <S>                                                        <C>
 Section  3B.01. Sinking Fund Payments....................................   24
 Section  3B.02. Satisfaction of Sinking Fund Payments with Securities....   24
 Section  3B.03. Redemption of Securities for Sinking Fund................   25
 
                                   ARTICLE 4
 
                                   Covenants
 
 Section   4.01. Payment of Securities....................................   25
 Section   4.02. Maintenance of Office or Agency..........................   26
 Section   4.03. Corporate Existence......................................   26
 Section   4.04. Liquidation..............................................   27
 Section   4.05. Compliance Certificate...................................   28
 Section   4.06. SEC Reports..............................................   28
 Section   4.07. Waiver of Stay, Extension or Usury Laws..................   29
 Section   4.08. Restrictions on Liens....................................   29
 Section   4.09. Restrictions on Sales and Leasebacks.....................   30
 
                                   ARTICLE 5
 
                             Successor Corporation
 
 Section   5.01. When Company May Merge, etc. ............................   31
 Section   5.02. Successor Corporation Substituted........................   32
 
                                   ARTICLE 6
 
                              Default and Remedies
 
 Section   6.01. Events of Default........................................   32
 Section   6.02. Acceleration.............................................   33
 Section   6.03. Other Remedies...........................................   34
 Section   6.04. Waiver of Past Defaults..................................   35
 Section   6.05. Control by Majority......................................   35
 Section   6.06. Limitation on Suits......................................   35
</TABLE>
<PAGE>
 
 
                                      iii
<TABLE>
<CAPTION>
                                                                            PAGE
                                                                            ----
 <C>             <S>                                                        <C>
 Section   6.07. Rights of Holders to Receive Payment.....................   36
 Section   6.08. Collection Suit by Trustee...............................   36
 Section   6.09. Trustee May File Proofs of Claim.........................   36
 Section   6.10. Priorities...............................................   37
 Section   6.11. Undertaking for Costs....................................   37
 
                                   ARTICLE 7
 
                                    Trustee
 
 Section   7.01. Duties of Trustee........................................   38
 Section   7.02. Rights of Trustee........................................   39
 Section   7.03. Individual Rights of Trustee.............................   39
 Section   7.04. Trustee's Disclaimer.....................................   40
 Section   7.05. Notice of Defaults.......................................   40
 Section   7.06. Reports by Trustee to Holders............................   40
 Section   7.07. Compensation and Indemnity...............................   40
 Section   7.08. Replacement of Trustee...................................   41
 Section   7.09. Successor Trustee by Merger, etc.........................   42
 Section   7.10. Eligibility; Disqualification............................   42
 Section   7.11. Preferential Collection of Claims Against Company........   43
 
                                   ARTICLE 8
 
                             Discharge of Indenture
 
 Section   8.01. Termination of Company's Obligations.....................   43
 Section   8.02. Application of Trust Money...............................   44
 Section   8.03. Repayment to Company.....................................   45
 Section   8.04. Reinstatement............................................   45
 Section   8.05. Indemnity for U.S. Government Obligations................   45
 
                                   ARTICLE 9
 
                      Amendments, Supplements and Waivers
 
 Section   9.01. Without Consent of Holders...............................   46
 Section   9.02. With Consent of Holders..................................   46
 Section   9.03. Compliance With Trust Indenture Act......................   48
 Section   9.04. Revocation and Effect of Consents........................   48
 Section   9.05. Notation On or Exchange of Securities....................   49
 Section   9.06. Trustee to Sign Amendments, etc..........................   49
</TABLE>
<PAGE>
 
 
                                       iv
 
                                   ARTICLE 10
 
                                 Miscellaneous
 
<TABLE>
<CAPTION>
                                                                           PAGE
                                                                           ----
 <C>             <S>                                                       <C>
 Section  10.01. Trust Indenture Act Controls............................   49
 Section  10.02. Notices.................................................   49
 Section  10.03. Communications by Holders With Other Holders............   50
 Section  10.04. Certificate and Opinion as to Conditions Precedent......   50
 Section  10.05. Statements Required in Certificate or Opinion...........   50
 Section  10.06. Rules by Trustee, Paying Agent, Registrar...............   51
 Section  10.07. Legal Holidays..........................................   51
 Section  10.08. Governing Law...........................................   51
 Section  10.09. No Adverse Interpretation of Other Agreements...........   51
 Section  10.10. No Recourse Against Others..............................   51
 Section  10.11. Successors..............................................   52
 Section  10.12. Duplicate Originals.....................................   52
 Section  10.13. Separability............................................   52
 Section  10.14. Action of Holders When Securities are Denominated in
                  Different Currencies...................................   53
 Section  10.15. Monies of Different Currencies to be Segregated.........   53
 Section  10.16. Payment to be in Proper Currency........................   53
  Signatures..............................................................  54
  Exhibit A--Form of Security............................................. A-1
</TABLE>
- ---------
NOTE:  This Table of Contents shall not, for any purpose, be deemed to be a
       part of this Indenture.
<PAGE>
 
 INDENTURE, dated as of        , 199  between The Coastal Corporation, a Dela-
ware corporation (the "Company"), and Harris Trust and Savings Bank, as
Trustee (the "Trustee").
 
                            RECITALS OF THE COMPANY
 
 The Company has duly authorized the execution and delivery of this Indenture
to provide for the issuance from time to time of its unsecured notes, deben-
tures or other evidences of indebtedness (collectively, the "Securities"), to
be issued from time to time in one or more series (a "Series") as provided in
this Indenture and as shall be provided, in respect of any Series, in or pur-
suant to the Authorizing Resolution hereinafter referred to and/or in the in-
denture supplemental hereto (if any) relating to such Series.
 
                                   ARTICLE 1
 
                  Definitions and Incorporation by Reference
 
 Section 1.01. Definitions.
 
 "Affiliate" of any specified person means any other person directly or indi-
rectly controlling or controlled by or under direct or indirect common control
with such specified person. For the purposes of this definition, "control"
when used with respect to any person means the power to direct the management
and policies of such person, directly or indirectly, whether through the own-
ership of voting securities, by contract or otherwise; and the terms "control-
ling" and "controlled" have meanings correlative to the foregoing.
 
 "Agent" means any Registrar, Paying Agent or co-Registrar.
 
 "Attributable Debt" means, with respect to any Sale and Leaseback Transaction
as of any particular time, the present value (discounted at the rate of inter-
est implicit in the terms of the lease) of the obligations of the lessee under
such lease for net rental payments during the remaining term of the lease (in-
cluding any period for which such lease has been extended or may, at the op-
tion of the Company, be extended).
 
 "Authorizing Resolution" means a Board Resolution providing for the issuance
of a Series of Securities.
<PAGE>
 
 
                                       2
 
 "Bankruptcy Law" shall have the meaning provided in Section 6.01.
 
 "Board of Directors" means the Board of Directors of the Company or any duly
authorized committee of the Board.
 
 "Board Resolution" means a copy of a resolution certified by the Secretary or
an Assistant Secretary of the Company to have been duly adopted by the Board
of Directors and to be in full force and effect on the date of such certifica-
tion, and delivered to the Trustee (except as provided in Section 2.03).
 
 "Business Day" means a day that is not a Legal Holiday.
 
 "Capital Stock" means, with respect to any person, any and all shares, inter-
ests, participations or other equivalents (however designated) of corporate
stock of such person other than Mandatory Redemption Preferred Stock.
 
 "Capitalized Lease Obligation" means Indebtedness represented by obligations
under a lease that is required to be capitalized for financial reporting pur-
poses in accordance with generally accepted accounting principles and the
amount of such Indebtedness shall be the capitalized amount of such obliga-
tions determined in accordance with such principles.
 
 "Company" means the party named as such in this Indenture until a successor
replaces it pursuant to this Indenture and thereafter means the successor.
 
 "Company Request" and "Company Order" mean, respectively, a written request
or order signed in the name of the Company by two Officers of the Company or
by an Officer and the Treasurer, an Assistant Treasurer, the Secretary or an
Assistant Secretary, and delivered to the Trustee in respect of the Series to
which the Company Request or Company Order shall relate.
 
 "Consolidated Net Tangible Assets" means the total assets appearing on a con-
solidated balance sheet of the Company and its Subsidiaries less, without du-
plication: (i) current liabilities; (ii) reserves for estimated rate refunds
pending the outcome of a rate proceeding to the extent such refunds have not
been finally determined; (iii) all intangible assets; and (iv) deferred income
tax assets.
<PAGE>
 
 
                                       3
 
 "Consolidated Subsidiary" means a Subsidiary which for financial reporting
purposes is accounted for by the Company as a consolidated subsidiary.
 
 "Corporate Trust Office" or other similar term means the principal office of
the Trustee at which at any particular time its corporate trust business shall
be administered, which office at the date hereof is located at         ; the
Trustee will notify the Company of any change thereof.
 
 "Custodian" shall have the meaning provided in Section 6.01.
 
 "Default" means any event which is, or after notice or passage of time or
both would become, an Event of Default.
 
 "Depository" means, with respect to the Securities of any Series issuable or
issued in the form of one or more Global Securities, the Person designated as
Depository by the Company pursuant to Section 2.02, initially The Depository
Trust Company, until a successor Depository shall have become such pursuant to
the applicable provisions of this Indenture, and thereafter "Depository" shall
mean or include each person who is then a Depository hereunder, and, if at any
time there is more than one such person, "Depository" as used with respect to
the Securities of any such Series shall mean the Depository with respect to
the Global Securities of such Series.
 
 "Event of Default" shall have the meaning provided in Section 6.01.
 
 "Extendible Securities" means Securities of any Series issued hereunder the
final maturity of which is extendible for a stated period of time, as shall be
provided in, or pursuant to, the Authorizing Resolution and/or supplemental
indenture (if any) relating to such Series.
 
 "Funded Debt" means all Indebtedness maturing one year or more from the date
of the creation thereof, all Indebtedness directly or indirectly renewable or
extendible, at the option of the debtor, by its terms or by the terms of any
instrument or agreement relating thereto, to a date one year or more from the
date of the creation thereof, and all Indebtedness under a revolving credit or
similar agreement obligating the lender or lenders to extend credit over a pe-
riod of one year or more, even though such Indebtedness may also conform to
the definition of Short-Term Borrowing.
 
 "Global Security" means a Security evidencing all or a part of a Series of
Securities issued to and registered in the name of the Depository for such Se-
ries, or its nominee, in accordance with Section 2.02, and bearing the legend
prescribed in Section 2.03.
<PAGE>
 
 
                                       4
 
 "Holder" or "Securityholder" means, with respect to any Security, the person
in whose name such Security is registered on the Security Register.
 
 "Indebtedness" means (i) any liability of any person (a) for borrowed money,
(b) evidenced by a note, debenture or similar instrument (including a purchase
money obligation) given in connection with the acquisition of any property or
assets (other than inventory or similar property acquired in the ordinary course
of business), including securities, or (c) for the payment of money relating to
a Capitalized Lease Obligation; (ii) any guarantee by any person of any liabil-
ity of others described in the preceding clause (i); and (iii) any amendment,
renewal, extension or refunding of any liability of the types referred to in
clauses (i) and (ii) above.
 
 "Indenture" means this Indenture as amended or supplemented from time to time
and shall include the forms and terms of particular Series of Securities es-
tablished as contemplated hereunder.
 
 "Interest Payment Date" means, for any Series of Securities issued and out-
standing hereunder, the date or dates in each year on which any interest on
such Series is paid or made available for payment.
 
 "Legal Holiday" shall have the meaning provided in Section 10.07.
 
 "Lien" means any mortgage, lien, pledge, charge, or other security interest
or encumbrance of any kind.
 
 "Mandatory Redemption Preferred Stock" means, with respect to any person, any
and all shares of preferred stock of such person now outstanding or hereafter
issued, subject to mandatory redemption provisions.
 
 "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 pro-
vided, whether at the Stated Maturity or by declaration of acceleration, call
for redemption or otherwise.
 
 "Maturity Date" means the date specified in each Security on which the prin-
cipal thereof is due and payable in full.
 
 "Officer" means the Principal Executive Officer, Principal Financial Officer
or Principal Accounting Officer of the Company.
 
 "Officers' Certificate" means a certificate signed by two Officers or by an
Officer and the Treasurer or an Assistant Treasurer or the Secretary or an As-
sistant Secretary of the Company and delivered to the Trustee. See Sections
10.04 and 10.05.
<PAGE>
 
 
                                       5
 
 "Opinion of Counsel" means a written opinion from legal counsel who is ac-
ceptable to the Trustee. The counsel may be an employee of or counsel to the
Company. See Sections 10.04 and 10.05.
 
 "Original Issue Date" means the date on which a Security is issued to the
original purchaser thereof, as specified in such Security.
 
 "Original Issue Discount Securities" means Securities which provide for an
amount less than 100% of the principal amount thereof to be due and payable
upon a declaration of acceleration of the Maturity thereof pursuant to Section
6.02.
 
 "Paying Agent" shall have the meaning provided in Section 2.04, except that
for the purposes of Article 8 and Section 4.04 the Paying Agent shall not be
the Company or any Subsidiary.
 
 "person" means any individual, corporation, partnership, joint venture, asso-
ciation, joint-stock company, trust, unincorporated organization or government
or other agency or political subdivision thereof.
 
 "principal" of a debt security means the principal of the security plus, when
appropriate, the premium, if any, on the security.
 
 "Principal Domestic Property of the Company" shall mean any property, plant,
equipment or facility of the Company which is located in the United States or
any territory or political subdivision thereof, except any property which the
Board of Directors or management of the Company shall determine to be not ma-
terial to the business or operations of the Company and its Subsidiaries,
taken as a whole.
 
 "Redeemable Securities" means Securities of any Series which may be redeemed,
at the option of the Company, prior to the Stated Maturity thereof, on the
terms specified in or pursuant to the Authorizing Resolution and/or supplemen-
tal indenture relating to such Series and in accordance with Article 3A here-
in.
 
 "Redemption Date" when used with respect to any Security of any Series to be
redeemed means the date fixed for such redemption by or pursuant to the provi-
sions of such Security, this Indenture and the Authorizing Resolution and/or
supplemental indenture (if any) relating to such Security.
 
 "Redemption Price" when used with respect to any Security of any Series to be
redeemed means the price at which it is to be redeemed pursuant to the provi-
sions of such Security, this Indenture and the Authorizing Resolution and/or
supplemental indenture relating to such Security.
 
 "Registrar" shall have the meaning provided in Section 2.04.
<PAGE>
 
 
                                       6
 
 "Regular Record Date" means, for the interest payable on any Interest Payment
Date in respect of any Series of Securities, except as provided in, or pursu-
ant to, the Authorizing Resolution and/or supplemental indenture (if any) re-
lating thereto, the day (whether or not a Business Day) that is fifteen days
preceding the applicable Interest Payment Date.
 
 "Required Currency" shall have the meaning provided in Section 10.16.
 
 "Sale and Leaseback Transaction" shall have the meaning provided in Section
4.09.
 
 "SEC" means the Securities and Exchange Commission.
 
 "Securities" means the Securities, as amended or supplemented from time to
time pursuant to the terms of this Indenture, of the Company of any Series
that are issued under this Indenture.
 
 "Security Register" shall have the meaning provided in Section 2.04.
 
 "Series" means, with respect to Securities issued hereunder, the Securities
issued pursuant to any particular Authorizing Resolution and/or supplemental
indenture (if any), subject to the right of the Board of Directors to specify
in such Authorizing Resolution and/or supplemental indenture (if any) that
such Securities shall constitute more than one Series.
 
 "Short-Term Borrowing" means all Indebtedness in respect of borrowed money
maturing on demand or within one year from the date of the creation thereof
and not directly or indirectly renewable or extendible, at the option of the
debtor, by its terms or by the terms of any instrument or agreement relating
thereto, to a date one year or more from the date of the creation thereof;
provided, that Indebtedness in respect of borrowed money arising under a re-
volving credit or similar agreement which obligates the lender or lenders to
extend credit over a period of one year or more shall constitute Funded Debt
and not Short-Term Borrowing even though the same matures on demand or within
one year from the date as of which such Short-Term Borrowing is to be deter-
mined.
 
 "Significant Subsidiary" means a Subsidiary, including its Subsidiaries,
which meets any of the following conditions:
 
  (a) the Company's and its other Subsidiaries' investments in and advances
 to the Subsidiary exceed 10 percent of the total assets of the Company and
 its Subsidiaries consolidated as of the end of any two of the three most re-
 cently completed fiscal years; or
 
  (b) the Company's and its other Subsidiaries' proportionate share of the
 total assets of the Subsidiary exceeds 10 percent of the total assets of the
<PAGE>
 
 
                                       7
 Company and its Subsidiaries consolidated as of the end of any two of the
 three most recently completed fiscal years; or
 
  (c) the Company's and its other Subsidiaries' equity in the income from
 continuing operations before income taxes, extraordinary items and cumula-
 tive effect of a change in accounting principles of the Subsidiary exceeds
 10 percent of such income of the Company and its Subsidiaries consolidated
 as of the end of any two of the three most recently completed fiscal years.
 
 "Sinking Fund" means, with respect to any Sinking Fund Securities, a sinking
fund provided for in Article 3B.
 
 "Sinking Fund Securities" means Securities of any Series which are required
to be redeemed from time to time prior to the Stated Maturity thereof in whole
or in part under a Sinking Fund, on the terms specified in the Authorizing
Resolution and/or supplemental indenture (if any) relating to such Series and
in accordance with Article 3B herein.
 
 "Special Record Date" shall have the meaning provided in Section 2.13.
 
 "Stated Maturity" when used with respect to any Security or any installment
of interest thereon means the date specified in such Security as the fixed
date on which the principal of such Security or such installment of interest
is due and payable.
 
 "Subsidiary" means (i) a corporation a majority of whose Capital Stock with
voting power, under ordinary circumstances, to elect directors is at the time,
directly or indirectly, owned by the Company, by the Company and a Subsidiary
(or Subsidiaries) of the Company or by a Subsidiary (or Subsidiaries) of the
Company or (ii) any other person (other than a corporation) in which the Com-
pany, a Subsidiary (or Subsidiaries) of the Company or the Company and a Sub-
sidiary (or Subsidiaries) of the Company, directly or indirectly, at the date
of determination thereof has at least majority ownership interest; provided,
that no corporation shall be deemed a Subsidiary until the Company, a Subsidi-
ary (or Subsidiaries) of the Company or the Company and a Subsidiary (or Sub-
sidiaries) of the Company acquires more than 50% of the outstanding voting
stock thereof and has elected a majority of its board of directors.
 
 "TIA" means the Trust Indenture Act of 1939 (15 U.S. Code (S)(S) 77aaa-
77bbbb) as in effect on the date of this Indenture except as provided in Sec-
tion 9.03.
 
 "Trustee" means the party named as such in this Indenture until a successor
replaces it in accordance with the provisions of this Indenture and thereafter
means and includes the person or each person who is then a Trustee hereunder,
and if at any time there is more than one such person, "Trustee" as used with
<PAGE>
 
 
                                       8
respect to the Securities of any Series shall mean the Trustee with respect to
Securities of that Series.
 
 "Trust Officer" means any officer or assistant officer of the Trustee as-
signed by the Trustee to administer its corporate trust matters.
 
 "U.S. Government Obligations" shall have the meaning provided in Section
8.01.
 
 "Yield to Maturity" means, with respect to any Series of Securities, the
yield to maturity thereof, calculated at the time of issuance thereof, or, if
applicable, at the most recent redetermination of interest thereon, and calcu-
lated in accordance with accepted financial practice.
 
 Section 1.02. Incorporation by Reference of Trust Indenture Act.
 
 Whenever this Indenture refers to a provision of the TIA, the provision is
incorporated by reference in and made a part of this Indenture. The following
TIA terms used in this Indenture have the following meanings:
 
  "Commission" means the SEC;
 
  "indenture securities" means the Securities;
 
  "indenture security holder" means a Securityholder;
 
  "indenture to be qualified" means this Indenture;
 
  "indenture trustee" or "institutional trustee" means the Trustee; and
 
  "obligor" on the indenture securities means the Company or any other obli-
 gor on the Securities.
 
 All other TIA terms used in this Indenture that are defined by the TIA, de-
fined by TIA reference to another statute or defined by SEC rule and not oth-
erwise defined herein have the meanings assigned to them therein.
 
 Section 1.03. Rules of Construction.
 
 Unless the context otherwise requires:
 
  (1) a term has the meaning assigned to it;
 
  (2) an accounting term not otherwise defined has the meaning assigned to it
 in accordance with generally accepted accounting principles in effect in the
 United States, and any other reference in this Indenture to "generally ac-
 cepted accounting principles" refers to generally accepted accounting prin-
 ciples in effect in the United States;
<PAGE>
 
 
                                       9
 
  (3) "or" is not exclusive;
 
  (4) words in the singular include the plural, and words in the plural in-
 clude the singular;
 
  (5) provisions apply to successive events and transactions;
 
  (6) "herein," "hereof," "hereunder" and other words of similar import refer
 to this Indenture as a whole and not to any particular Article, Section or
 other subdivision; and
 
  (7) "include," "included," and "including" as used herein shall be deemed
 in each case to be folowed by the phrase "without limitation."
 
                                   ARTICLE 2
 
                                The Securities
 
 Section 2.01. Form of Securities.
 
 The Securities of each Series and the certificate of authentication thereon
shall be in substantially the forms set forth in Exhibit A or in such other
forms as shall be specified in, or pursuant to, the Authorizing Resolution
and/or in the indenture supplemental hereto (if any) relating to such Series,
with such appropriate insertions, omissions, substitutions and other varia-
tions as are required or permitted by this Indenture or the said Authorizing
Resolution and/or supplemental indenture (if any).
 
 The definitive Securities of each Series shall be printed, lithographed or
engraved or produced by any combination of these methods on steel engraved
borders or may be produced in any other manner permitted by the rules of any
securities exchange on which the Securities may be listed, or, if they shall
not be listed on any securities exchange, in any other manner consistent here-
with, all as shall be determined by the officers executing such Securities, as
evidenced by their execution of such Securities. The Securities may have nota-
tions, legends or endorsements required by law, stock exchange rule or usage.
The Company shall approve the form of the Securities and any notation, legend
or endorsement on them.
 
 The terms and provisions contained in the Securities, annexed hereto as Ex-
hibit A or such other forms as specified in the Authorizing Resolution and/or
supplemental indenture (if any) relating thereto, shall constitute, and are
hereby expressly made, a part of this Indenture.
<PAGE>
 
 
                                      10
 
 Section 2.02. Title and Terms.
 
 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
shall be as provided in an Authorizing Resolution and/or supplemental inden-
ture (if any) or shall be determined in the manner specified therein. The
terms to be specified in respect of each Series in the Authorizing Resolution
and/or supplemental indenture (if any), or by such person and/or procedures as
shall be provided therein, shall include the following:
 
  (1) the title of the Securities of such Series, which shall distinguish
 such Series from all other Series;
 
  (2) any limit upon the aggregate principal amount of the Securities of such
 Series which may be authenticated and delivered under this Indenture (except
 for Securities of such Series authenticated and delivered upon registration
 of transfer of, or in exchange for, or in lieu of, other Securities pursuant
 to Section 2.07, 2.08, 2.11, 3A.08 or 9.05);
 
  (3) the date or dates on which the principal of the Securities of such Se-
 ries is payable, and, if the Series shall be Extendible Securities, the
 terms on which the Company or any other person shall have the option to ex-
 tend the Maturity of such Securities and the rights, if any, of the Holders
 to require payment of the Securities;
 
  (4) the rate or rates at which the Securities of such Series shall bear in-
 terest, if any (whether floating or fixed), the provisions, if any, for de-
 termining such interest rate or rates and adjustments thereto, the date or
 dates from which such interest shall accrue, the provisions, if any, for de-
 termining such date or dates, the Interest Payment Dates therefor and the
 Regular Record Dates (if different from those provided in the form of Secu-
 rity herein set forth) for the determination of Holders of the Securities of
 such Series to whom interest is payable and the basis upon which interest,
 if any, shall be calculated if other than that of a 360-day year of twelve
 30-day months;
 
  (5) the place or places where the principal of and interest on Securities
 of such Series shall be payable (if other than as provided in Section 4.02),
 where Securities of such Series may be surrendered for registration of
 transfer or exchange and where notices or demands to or upon the Company in
 respect of Securities of such Series and this Indenture may be served;
 
  (6) the price or prices at which, the period or periods within which and
 the terms and conditions upon which the Securities of such Series may be re-
 deemed, in whole or in part, at the option of the Company, pursuant to a
 Sinking Fund or otherwise;
<PAGE>
 
 
                                      11
 
  (7) the obligation, if any, of the Company to redeem, purchase or repay Se-
 curities of such Series, in whole or in part, pursuant to a Sinking Fund or
 otherwise or at the option of a Holder thereof, and the price or prices at
 which, the period or periods within which and the terms and conditions upon
 which such redemption, purchase or repayment shall be made;
 
  (8) any deletions from, modifications of or additions to the Events of De-
 fault provided for herein with respect to the Securities of such Series, and
 any deletions from, modifications of or additions to the covenants or obli-
 gations provided for herein of the Company to the Holders of the Securities
 of such Series;
 
  (9) if less than 100% of the principal amount of the Securities of such Se-
 ries is payable on acceleration under Section 6.02 or in bankruptcy under
 Section 6.09 at any time, a schedule of or the manner of computing the
 amounts which are so payable from time to time;
 
  (10) the form of the Securities of such Series (which may be, but which
 need not be, consistent with the form set forth in Exhibit A attached here-
 to), including whether the Securities of such Series shall be issued in
 whole or in part in the form of one or more Global Securities and, in such
 case, the Depository with respect to such Global Security or Securities and
 the circumstances under which any Global Security may be registered for
 transfer or exchange, or authenticated and delivered, in the name of a Per-
 son other than such Depository or its nominee, if other than as set forth in
 Section 2.07;
 
  (11) if other than United States dollars, the currency(ies) in which pay-
 ment of the principal of or interest, if any, on the Securities of such Se-
 ries shall be payable;
 
  (12) if the principal of or interest, if any, on the Securities of such Se-
 ries is to be payable, at the election of the Company or a Holder thereof,
 in a currency or currencies other than that in which the Securities are
 stated to be payable, the period or periods within which, and the terms and
 conditions upon which, such election may be made;
 
  (13) if the amount 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 currency or currencies other than that in which the Securities are
 stated to be payable, the manner in which such amounts shall be determined;
 
  (14) whether and under what circumstances the Company will pay any addi-
 tional amounts on the Securities of such Series in respect of any tax, as-
 sessment or governmental charge and, if so, whether the Company will have
 the option to redeem the Securities of such Series in lieu of making such
 payment;
 
  (15) any provision relating to the issuing of the Securities of such Series
 as Original Issue Discount Securities (including, without limitation, the
 issue price thereof, the rate or rates at which such original issue discount
 shall
<PAGE>
 
 
                                      12
 accrue, if any, and the date or dates from or to which, or period or periods
 during which, such original issue discount shall accrue at such rate or
 rates;
 
  (16) if other than denominations of $1,000 and any integral multiple there-
 of, the denominations in which Securities of such Series shall be issued;
 and
 
  (17) any other terms of the Securities of such Series; provided, that such
 other terms shall not be inconsistent with any express terms of this Inden-
 ture or in conflict with any express terms of any other Series of Securities
 which shall be issued and outstanding.
 
 All Securities of any one Series shall be substantially identical in form ex-
cept as to denomination and except as may be otherwise provided in and pursu-
ant to the Authorizing Resolutions and/or supplemental indenture (if any) re-
lating thereto. All Securities of any one Series need not be issued at the
same time and may be issued from time to time, consistent with this Indenture,
if so provided by or pursuant to such Authorizing Resolutions and/or supple-
mental indenture (if any) relating thereto.
 
 Any such Authorizing Resolution with respect to the Securities of any Series
filed with the Trustee on or before the initial issuance of the Securities of
such Series shall be incorporated herein by reference with respect to Securi-
ties of such Series and shall thereafter be deemed to be a part of this Inden-
ture for all purposes relating to the Securities of such Series as if such Au-
thorizing Resolution were set forth herein in full.
 
 Section 2.03. Execution and Authentication.
 
 Two Officers or an Officer and the Secretary of the Company shall sign the
Securities for the Company by manual or facsimile signature. The Company's
seal shall be reproduced on the Securities and may be in facsimile form.
 
 If an Officer or a Secretary whose signature is on a Security no longer holds
that office at the time the Trustee authenticates the Security, the Security
shall be valid nevertheless.
 
 A Security shall not be valid until the Trustee manually signs the certifi-
cate of authentication on the Security. The signature shall be conclusive evi-
dence that the Security has been authenticated under this Indenture.
 
 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, together with a Company Order for the authentication
<PAGE>
 
 
                                      13
and delivery of such Securities. The Company Order may provide that the Secu-
rities which are the subject thereof shall be authenticated and delivered by
the Trustee upon the telephonic, written or other order of persons designated
in the Company Order, and that such persons are authorized to specify the
terms and conditions of such Securities, to the extent permitted by the Autho-
rizing Resolution and/or supplemental indenture (if any) relating thereto. The
Trustee shall execute and deliver the supplemental indenture (if any) relating
to said Securities and the Trustee shall authenticate and deliver said Securi-
ties as specified in such Company Order; provided that, prior to authentica-
tion and delivery of the first Securities of any Series, the Trustee shall
have received:
 
  (1) a copy of the Authorizing Resolution, with a copy of the form of Secu-
 rity approved thereby attached thereto, or a supplemental indenture in re-
 spect of the issuance of the Series, executed on behalf of the Company;
 
  (2) an Officers' Certificate to the effect that the Securities of such Se-
 ries comply or will comply with the requirements of this Indenture and the
 said Authorizing Resolution and/or supplemental indenture (if any);
 
  (3) an Opinion of Counsel (a) to the effect that (i) the Securities of such
 Series, the Authorizing Resolution and/or the supplemental indenture (if
 any) relating thereto comply or will comply with the requirements of this
 Indenture, and (ii) the Securities of such Series, when authenticated and
 delivered by the Trustee in accordance with the said Company Order, will
 constitute valid and binding obligations of the Company enforceable in ac-
 cordance with their terms, subject to (A) bankruptcy and other laws affect-
 ing creditors' rights generally as in effect from time to time, (B) limita-
 tions of generally applicable equitable principles and (C) other exceptions
 acceptable to the Trustee and its counsel; and (b) relating to such other
 matters as may reasonably be requested by the Trustee or its counsel; and
 
  (4) if the Securities to be issued are Original Issue Discount Securities,
 an Officers' Certificate setting forth the Yield to Maturity for the Securi-
 ties or other information sufficient to compute amounts due on acceleration,
 or specifying the manner in which such amounts are to be determined, pro-
 vided that such Yield to Maturity and other facts are not specified in the
 form of the Securities.
 
 Subject to Section 7.01 hereof, the Trustee shall be fully protected in rely-
ing upon the documents delivered to it as provided above in connection with
the issuance of any Series of Securities.
 
 The Trustee shall have the right to decline to authenticate and deliver any
Securities under this Section 2.03 if the Trustee, being advised by counsel,
determines that such action may not lawfully be taken or if the Trustee in
good faith by a committee of its Trust Officers shall determine that such ac-
tion would
<PAGE>
 
 
                                      14
expose the Trustee to liability to Holders of previously issued and outstand-
ing Securities.
 
 Each Security shall be dated the date of its authentication unless otherwise
specified in the Authorizing Resolution and/or supplemental indenture relating
thereto.
 
 The Trustee may appoint an authenticating agent reasonably acceptable to the
Company to authenticate Securities. An authenticating agent may authenticate
Securities whenever the Trustee may do so. Each reference in this Indenture to
authentication by the Trustee includes authentication by such agent. An au-
thenticating agent has the same rights as an Agent to deal with the Company or
an Affiliate of the Company
 
 The Securities of each Series shall be issuable only in registered form with-
out coupons and only in denominations of $1,000 and any integral multiple
thereof, or in such other currencies or denominations as may be specified in,
or pursuant to, the Authorizing Resolution and/or supplemental indenture (if
any) relating to the Series.
 
 If Securities of any Series are to be issued in the form of one or more
Global Securities, then the Company shall deliver such Global Security or Se-
curities executed by the Company to the Trustee, together with a Company Order
for the authentication and delivery of such Global Security or Securities, and
the Trustee shall, in accordance with this Section 2.03 and such Company Or-
der, authenticate and deliver such Global Security or Securities that (i)
shall represent and shall be denominated in an amount equal to the aggregate
principal amount of all of the Securities of such Series to be issued in the
form of such Global Security or Securities and not yet cancelled, (ii) shall
be registered in the name of the Depository for such Global Security or Secu-
rities or the nominee of such Depository, (iii) shall be delivered by the
Trustee to such Depository or pursuant to such Depository's instructions and
(iv) shall bear a legend substantially to the following effect: "Unless and
until this Security is exchanged in whole or in part for Securities in certif-
icated form, this Security may not be transferred except as a whole by the De-
pository to a nominee of the Depository or by a nominee of the Depository to
the Depository or another nominee of the Depository or by the Depository or
its nominee to a successor Depository or its nominee."
 
 Each Depository designated must, at the time of its designation and at all
times while it serves as Depository, be a clearing agency registered under the
Securities Exchange Act of 1934, as amended, and any other applicable statute
or regulation.
<PAGE>
 
 
                                      15
 
 Section 2.04. Registrar and Paying Agent.
 
 The Company shall cause to be kept a register (the "Security Register") at an
office or agency where Securities may be presented for registration of trans-
fer or for exchange ("Registrar") and an office or agency where Securities may
be presented for payment ("Paying Agent"). The Company may have one or more
co-Registrars and one or more additional paying agents. The term "Paying
Agent" includes any additional paying agent.
 
 The Company shall enter into an appropriate agency agreement with any Agent
not a party to this Indenture. The agreement shall implement the provisions of
this Indenture that relate to such Agent. The Company shall give prompt writ-
ten notice to the Trustee of the name and address of any such Agent and the
Trustee shall have the right to inspect the Security Register at all reason-
able times and to obtain copies thereof. If the Registrar shall not be the
Trustee in respect of any Series, the Company shall promptly notify the Regis-
trar as to the amounts and terms of each Security of such Series which shall
be authenticated and delivered hereunder, and as to the names in which such
Securities shall be registered. If the Company fails to maintain a Registrar
or Paying Agent, the Trustee shall act as such and shall be entitled to appro-
priate compensation therefor pursuant to Section 7.07.
 
 The Company initially appoints the Trustee as Registrar and Paying Agent.
 
 Section 2.05. Paying Agent to Hold Money In Trust.
 
 Each Paying Agent shall hold in trust for the benefit of Securityholders or
the Trustee all money held by the Paying Agent for the payment of principal of
or interest on the Securities (whether such money has been paid to it by the
Company or any other obligor on the Securities), and shall notify the Trustee
of any default by the Company (or any other obligor on the Securities) in mak-
ing any such payment. If the Company or a Subsidiary acts as Paying Agent, it
shall segregate the money and hold it as a separate trust fund. The Company at
any time may require a Paying Agent to pay all money held by it to the Trustee
and account for any funds disbursed and the Trustee may at any time during the
continuance of any payment default, upon written request to a Paying Agent,
require such Paying Agent to pay all money held by it to the Trustee and to
account for any funds disbursed. Upon doing so the Paying Agent shall have no
further liability for the money.
 
 Section 2.06. Securityholder Lists.
 
 The Trustee shall preserve in as current a form as is reasonably practicable
the most recent list furnished to it of the names and addresses of Security-
holders. If
<PAGE>
 
 
                                      16
the Trustee is not the Registrar, the Company shall furnish to the Trustee ten
days before each Interest Payment Date and at such other times as the Trustee
may request in writing a list in such form and as of such date as the Trustee
may reasonably require of the names and addresses of Holders of Securities of
any Series and the Company shall otherwise comply with Section 312(a) of the
TIA.
 
 The Trustee shall be entitled to rely upon a certificate of the Registrar,
the Company or such other Paying Agent, as the case may be, as to the names
and addresses of the Holders of Securities of any Series and the principal
amounts and serial numbers of such Securities.
 
 Section 2.07. Transfer and Exchange.
 
 When Securities are presented to the Registrar or a co-Registrar with a re-
quest to register the transfer or to exchange them for an equal principal
amount of Securities of the same Series and Stated Maturity of other autho-
rized denominations, the Registrar shall register the transfer or make the ex-
change as requested if its requirements for such transactions are met. To per-
mit registrations of transfers and exchanges, the Company shall execute and
the Trustee shall authenticate Securities at the Registrar's request. No serv-
ice charge shall be made to any Holder for any registration of transfer or ex-
change, but the Company or the Trustee may require payment of a sum sufficient
to cover any transfer tax or similar governmental charge payable in connection
therewith (other than any such transfer taxes or similar governmental charge
payable upon exchanges pursuant to Section 2.11, 3A.08 or 9.05 in which case
such transfer taxes or similar governmental charges shall be paid by the Com-
pany).
 
 The Company shall not be required (i) to issue, register the transfer of or
exchange any Security of any Series during a period beginning at the opening
of the day which is 15 Business Days before the day of the mailing of a notice
of redemption of Securities of such Series selected for redemption under Sec-
tion 3A.04 or 3B.01 and ending at the close of business on the day of such
mailing, or (ii) to register the transfer of or exchange any Security so se-
lected for redemption in whole or in part, except, in the case of any Security
to be redeemed in part, the portion thereof not to be redeemed.
 
 Notwithstanding any other provision of this Section 2.07, unless and until it
is exchanged in whole or in part for Securities, a Global Security represent-
ing all or part of the Securities of a Series may not be transferred except as
a whole by the Depository for such Series to a nominee of such Depository or
by a nominee
<PAGE>
 
 
                                      17
of such Depository to such Depository or another nominee of such Depository or
by such Depository or any such nominee to a successor Depository for such Se-
ries or a nominee of such successor Depository.
 
 If at any time the Depository for any Securities of a Series represented by
one or more Global Securities notifies the Company that it is unwilling or un-
able to continue as Depository for such Series or if at any time the Deposi-
tory for such Series shall no longer be eligible under Section 2.03, the Com-
pany shall appoint a successor Depository with respect to such Series. If a
successor Depository for such Series is not appointed by the Company within 90
days after the Company receives such notice or becomes aware of such ineligi-
bility, the Company's election that the Securities be represented by one or
more Global Securities pursuant to Section 2.02 shall no longer be effective
and the Company shall deliver Securities of such Series executed by the Com-
pany to the Trustee, together with a Company Order for the authentication and
delivery of such Securities, and the Trustee shall, in accordance with Section
2.03 and such Company Order, authenticate and deliver Securities of such Se-
ries, in any authorized denominations, in an aggregate principal amount equal
to the principal amount of the Global Security or Securities representing such
Series in exchange for such Global Security or Securities.
 
 The Company may at any time and in its sole discretion determine that the Se-
curities of any Series issued in the form of one or more Global Securities
shall no longer be represented by a Global Security or Securities. In such
event the Company shall deliver Securities of such Series executed by the Com-
pany to the Trustee, together with a Company Order for the authentication and
delivery of such Securities, and the Trustee shall, in accordance with Section
2.03 and such Company Order, authenticate and deliver Securities of such Se-
ries, in any authorized denominations, in an aggregate principal amount equal
to the principal amount of the Global Security or Securities representing such
Series, in exchange for such Global Security or Securities.
 
 If specified by the Company in the Authorizing Resolution and/or supplemental
indenture (if any) relating to the Securities of a Series represented by a
Global Security, the Depository for such Series may surrender such Global Se-
curity in exchange in whole or in part for Securities of the same Series on
such terms as are acceptable to the Company and the Depository. Thereupon, the
Company shall deliver Securities of such Series executed by the Company to the
Trustee, together with a Company Order for the authentication and delivery of
such
<PAGE>
 
 
                                      18
Securities, and the Trustee shall, in accordance with Section 2.03 and such
Company Order, authenticate and deliver, without charge,
 
  (1) to the person specified by such Depository, a new Security or Securi-
 ties of the same Series, in any authorized denominations as requested by
 such person, in an aggregate principal amount equal to and in exchange for
 such person's beneficial interest in the Global Security; and
 
  (2) to such Depository a new Global Security in a denomination equal to the
 difference, if any, between the principal amount of the surrendered Global
 Security and the aggregate principal amount of Securities authenticated and
 delivered pursuant to clause (1) above.
 
 Upon the exchange of a Global Security for the Securities of a Series repre-
sented thereby, in authorized denominations, such Global Security shall be
cancelled by the Trustee or an Agent of the Company or the Trustee. Securities
of a Series issued in exchange for a Global Security pursuant to this Section
2.07 shall be registered in such names and in such authorized denominations as
the Depository for such Global Security, pursuant to instructions from its di-
rect or indirect participants or otherwise, shall instruct the Trustee or an
Agent of the Company or the Trustee. The Trustee or such Agent shall deliver
at its office such Securities to or as directed by the persons in whose names
such Securities are so registered.
 
 Section  2.08. Replacement Securities.
 
 If a mutilated Security is surrendered to the Trustee or if the Holder of a
Security claims that the Security has been lost, destroyed or wrongfully tak-
en, the Company shall issue and the Trustee shall authenticate a replacement
Security of like tenor, Series and principal amount, bearing a number not as-
signed to any Security of the same Series then outstanding, if the Trustee's
requirements are met. If required by the Trustee or the Company, an indemnity
bond must be sufficient in the judgment of the Trustee to protect the Company,
the Trustee or any Agent from any loss which any of them may suffer if a Secu-
rity is replaced. The Company may charge such Holder for its expenses in re-
placing a Security.
 
 Every replacement Security is an additional obligation of the Company.
 
 Section 2.09. Outstanding Securities.
 
 Securities, or Securities of any particular Series, outstanding at any time
are all such Securities that have been authenticated and delivered by the
Trustee except for those cancelled by it, those delivered to it for cancella-
tion and those
<PAGE>
 
 
                                      19
described in this Section as not outstanding. A Security does not cease to be
outstanding because the Company or one of its Affiliates holds the Security.
 
 If a Security is replaced pursuant to Section 2.08, it ceases to be outstand-
ing unless the Trustee receives proof satisfactory to it that the replaced Se-
curity is held by a bona fide purchaser.
 
 If the Trustee or Paying Agent (other than the Company or a Subsidiary) holds
on the Maturity Date or Redemption Date money sufficient to pay Securities
payable on such date, then on and after that date such Securities cease to be
outstanding and interest on them ceases to accrue; provided that, if such Se-
curities are to be redeemed, notice of such redemption has been duly given
pursuant to this Indenture or provision therefor satisfactory to the Trustee
has been made.
 
 Section 2.10. Treasury Securities.
 
 In determining whether the Holders of the required principal amount of Secu-
rities of any Series have concurred in any direction, waiver or consent (a)
the principal amount of an Original Issue Discount Security, if any, of such
Series that shall be deemed to be outstanding for such purposes shall be the
amount that would be due and payable as of the date of determination upon a
declaration of acceleration thereof pursuant to Section 6.02 and (b) Securi-
ties of such Series owned by the Company or an Affiliate of the Company shall
be disregarded, except that for the purposes of determining whether the
Trustee shall be protected in relying on any such direction, waiver or con-
sent, only Securities of such Series which the Trustee actually knows are so
owned shall be so disregarded. Upon the request of the Trustee, the Company
shall furnish to the Trustee an Officers' Certificate identifying all Securi-
ties of such Series, if any, known by the Company to be owned by it or any of
its Affiliates.
 
 Section 2.11. Temporary Securities.
 
 Until definitive Securities of any Series are ready for delivery, the Company
may prepare and execute and, upon compliance with the requirements of Section
2.03, the Trustee shall authenticate temporary Securities of such Series. Tem-
porary Securities of any Series shall be substantially in the form of defini-
tive Securities of such Series but may have variations that the Company con-
siders appropriate for temporary Securities. In the case of Securities of any
Series, such temporary Securities may be in global form. Except in the case of
temporary Global Securities (which shall be exchanged as otherwise provided
herein or as otherwise provided in or pursuant to an Authorizing Resolution
and/or supplemental indenture, (if any), without unreasonable delay, the Com-
pany shall pre-
<PAGE>
 
 
                                      20
pare and the Trustee shall authenticate definitive Securities for such Series
in exchange for temporary Securities of such Series in an exchange pursuant to
Section 2.07.
 
 Section 2.12. Cancellation.
 
 The Company at any time may deliver Securities to the Trustee for cancella-
tion. The Registrar and the Paying Agent shall forward to the Trustee any Se-
curities surrendered to them for transfer, exchange or payment. The Trustee
and no one else shall cancel all Securities surrendered for transfer, ex-
change, payment or cancellation or for credit against any Sinking Fund Payment
in respect of such Series pursuant to Section 3B.02. The Company may not issue
new Securities to replace Securities it has paid or delivered to the Trustee
for cancellation.
 
 Section 2.13. Defaulted Interest.
 
 If the Company defaults in a payment of interest on the Securities of any Se-
ries, it shall pay the defaulted interest, plus any interest payable on the
defaulted interest, to the persons who are Holders of such Securities on a
subsequent special record date ("Special Record Date") and such term, as used
in this Section 2.13 with respect to the payment of any defaulted interest,
shall mean the fifteenth day next preceding the date fixed by the Company for
the payment of defaulted interest, whether or not such day is a Business Day.
At least 15 days before the Special Record Date, the Company shall mail to
each holder of such Securities a notice that states the Special Record Date,
the payment date and the amount of defaulted interest to be paid.
 
 Section 2.14. Persons Deemed Owners.
 
 The Company, the Trustee and any Agent may treat the person in whose name any
Security is registered as the owner of such Security for the purpose of re-
ceiving payment of principal of and (subject to Section 2.13) interest on such
Security and for all other purposes whatsoever, whether or not such Security
shall have matured, and neither the Company, the Trustee nor any Agent shall
be affected by any notice to the contrary.
<PAGE>
 
 
                                      21
 
                                  ARTICLE 3A
 
                                  Redemption
 
 Section 3A.01. Right of Redemption.
 
 Redeemable Securities may be redeemed otherwise than through the operation of
the Sinking Fund provided for in Article 3B at the election of the Company at
the times, on the conditions and at the Redemption Prices specified therein,
in (or pursuant to) the Authorizing Resolution relating thereto or in the sup-
plemental indenture (if any) executed in connection with the issuance of such
Securities to the extent provided therein, any Redemption Price to be accompa-
nied by accrued interest to the Redemption Date.
 
 Section 3A.02. Applicability of Article.
 
 Redemption of Securities at the election of the Company or otherwise, as per-
mitted or required by any provision referred to in Section 3A.01, shall be
made in accordance with such provision and this Article.
 
 Section 3A.03. Election to Redeem; Notice to Trustee.
 
 The election of the Company to redeem any Securities of any Series shall be
evidenced by a Board Resolution or set forth in an Officers' Certificate which
states that such election has been duly authorized by all requisite corporate
action on the part of the Company. In case of any redemption at the election
of the Company of less than all of the Securities of such Series the Company
shall, at least 60 days prior to the Redemption Date fixed by the Company (un-
less a shorter notice shall be satisfactory to the Trustee), notify the
Trustee of such Redemption Date and of the principal amount of Securities of
the Series or the several Series, as the case may be, to be redeemed. In the
case of any redemption of Securities prior to the expiration of any restric-
tion on such redemption provided in the Securities or elsewhere in this Inden-
ture, the Company shall furnish the Trustee with an Officers' Certificate evi-
dencing compliance with such restriction.
 
 Section 3A.04. Selection by Trustee of Securities to be Redeemed.
 
 If less than all the Securities of any Series are to be redeemed, the partic-
ular Securities of such Series to be redeemed shall be selected not more than
90 days prior to the Redemption Date by the Trustee, from the outstanding Se-
curities of
<PAGE>
 
 
                                      22
such Series not previously called for redemption, in compliance with the re-
quirements of the principal national securities exchange, if any, on which
such Securities are listed or, if the Securities are not listed on a national
securities exchange, on a pro rata basis or by lot, as the Trustee deems ap-
propriate in its sole discretion. The Trustee may select for redemption por-
tions (equal to the minimum authorized denomination of the Series or any inte-
gral multiple thereof) of the principal amount of such Securities of a denomi-
nation larger than such minimum denomination. If the Company shall so specify,
Securities held by the Company or any of its Subsidiaries or Affiliates shall
not be included in the Securities selected for redemption.
 
 The Trustee shall promptly notify the Company in writing of the Securities
selected for redemption and, in the case of any Securities selected for par-
tial redemption, the principal amount thereof to be redeemed.
 
 For all purposes of this Indenture, unless the context otherwise requires,
all provisions relating to the redemption of Securities shall relate, in the
case of any Securities redeemed or to be redeemed only in part, to the portion
of the principal amount of such Security which has been or is to be redeemed.
 
 Section 3A.05. Notice of Redemption.
 
 Notice of redemption shall be given by first class mail, postage prepaid,
mailed not less than 30 nor more than 60 days prior to the Redemption Date, to
each Holder of Securities to be redeemed, at his address appearing in the Se-
curity Register.
 
 All notices of redemption shall state:
 
  (1) the Redemption Date;
 
  (2) the Redemption Price;
 
  (3) if less than all outstanding Securities of the Series are to be re-
 deemed, the identification (and, in the case of partial redemption, the
 principal amount) of the particular Securities to be redeemed;
 
  (4) that on the Redemption Date the Redemption Price will become due and
 payable upon each such Security, and that interest thereon shall cease to
 accrue on and after said date;
 
  (5) that the redemption is for a Sinking Fund, if such is the case; and
 
  (6) the place or places where such Securities are to be surrendered for
 payment of the Redemption Price.
<PAGE>
 
 
                                      23
 
 Notice of redemption of Securities to be redeemed at the election of the Com-
pany shall be given by the Company or, at the Company's request, by the
Trustee in the name of and at the expense of the Company.
 
 Section 3A.06. Deposit of Redemption Price.
 
 On or prior to any Redemption Date, the Company shall deposit with the
Trustee or with a Paying Agent (or, if the Company is acting as its own Paying
Agent, segregate and hold in trust as provided in Section 2.05) an amount of
money sufficient to pay the Redemption Price of, and (except if the Redemption
Date shall be an Interest Payment Date) any accrued interest on, all the Secu-
rities or portions thereof which are to be redeemed on that date.
 
 Section 3A.07. Securities Payable on Redemption Date.
 
 Notice of redemption having been given as aforesaid, the Securities so to be
redeemed shall, on the Redemption Date, become due and payable at the Redemp-
tion Price thereof and from and after such date (unless the Company shall de-
fault in the payment of the Redemption Price and accrued interest) such Secu-
rities shall cease to bear interest. Upon surrender of any such Security for
redemption in accordance with said notice such Security shall be paid by the
Company at the Redemption Price, together with accrued interest to the Redemp-
tion Date; provided, however, that installments of interest whose Stated Matu-
rity is on or prior to the Redemption Date shall be payable to the Holders of
such Securities registered as such on the relevant Regular or Special Record
Date according to their terms and the provisions of such Security and Section
2.13.
 
 If any Security called for redemption shall not be so paid upon surrender
thereof for redemption, the principal shall, until paid or duly provided for,
bear interest from the Redemption Date at the rate borne by the Security or,
in the case of Original Issue Discount Securities, at a rate equal to the
Yield to Maturity thereof.
 
 Section 3A.08. Securities Redeemed in Part.
 
 Any Security which is to be redeemed only in part shall be surrendered at the
office or agency of the Company maintained for that purpose pursuant to Sec-
tion 4.02 (with, if the Company or the Trustee so requires, due endorsement
by, or a written instrument of transfer in form satisfactory to the Company
and the Trustee duly executed by, the Holder thereof or his attorney duly au-
thorized in
<PAGE>
 
 
                                      24
writing), and the Company shall execute and the Trustee shall authenticate and
deliver to the Holder of such Security, without service charge, a new Security
or Securities of the same Series, of any authorized denomination as requested
by such Holder in aggregate principal amount equal to and in exchange for the
unredeemed portion of the principal of the Security so surrendered.
 
                                  ARTICLE 3B
 
                                 Sinking Fund
 
 Section 3B.01. Sinking Fund Payments.
 
 As and for a Sinking Fund for the retirement of Sinking Fund Securities, the
Company will, until all such Securities are paid or payment thereof is duly
provided for, deposit in accordance with Section 3A.06, at such times and sub-
ject to such terms and conditions as shall be specified in the provisions of
such Securities and the Authorizing Resolution and/or supplemental indenture
(if any) relating thereto, such amounts in cash or such other Required Cur-
rency as shall be required or permitted under such provisions in order to re-
deem Securities on the specified Redemption Dates at a Redemption Price equal
to their principal amounts, less in each such case the amount of any credit
against such payment received by the Company under Section 3B.02. Each such
Sinking Fund payment shall be applied to the redemption of Securities on the
specified Redemption Date as herein provided.
 
 Section 3B.02. Satisfaction of Sinking Fund Payments with Securities.
 
 The Company (1) may deliver Securities of the same Series (other than any Se-
curities of such Series previously called for redemption pursuant to the Sink-
ing Fund or theretofore applied as a credit against a Sinking Fund payment)
and (2) may apply as a credit Securities of the same Series redeemed at the
election of the Company pursuant to Section 3A.01 or through the operation of
the Sinking Fund in any period in excess of the minimum amount required for
such period under Section 3B.01 and not theretofore applied as a credit
against a Sinking Fund payment, in each case in satisfaction of all or any
part of any Sinking Fund payment required to be made pursuant to Section
3B.01. Each such Security so delivered or applied shall be credited for such
purpose by the Trustee at a Redemption Price equal to its principal amount or,
in the case of an Original Issue Discount Security, its then accreted value,
and the required amount of such Sinking Fund payment in respect of such Series
shall be reduced accordingly.
<PAGE>
 
 
                                      25
 
 Section 3B.03. Redemption of Securities for Sinking Fund.
 
 If in any year the Company shall elect to redeem in excess of the minimum
principal amount of Securities of any Series required to be redeemed pursuant
to Section 3B.01 or to satisfy all or any part of any Sinking Fund payment by
delivering or crediting Securities of the same Series pursuant to Section
3B.02, then at least 45 days prior to the date on which the Sinking Fund pay-
ment in question shall be due, the Company shall deliver to the Trustee an Of-
ficers' Certificate specifying the amount of the Sinking Fund payment and the
portions thereof which are to be satisfied by payment of cash or such other
Required Currency, by delivery of Securities of such Series or by crediting
Securities of such Series, and, at least 45 days prior to the Sinking Fund
payment date (or such shorter period as shall be approved by the Trustee),
will also deliver to the Trustee the Securities of such Series to be so deliv-
ered. Such Officers' Certificate shall also state that the Securities forming
the basis of any such credit do not include any Securities which have been re-
deemed through the operation of the Sinking Fund in the minimum amount re-
quired under Section 3B.01 or previously credited against any Sinking Fund
payment. The Trustee shall, upon the receipt of such Officers' Certificate
(or, if it shall not have received such an Officers' Certificate at least 45
days prior to the Sinking Fund payment date, then following such 45th day),
select the Securities of such Series to be redeemed upon the next Sinking Fund
payment date, in the manner specified in Section 3A.04, and cause notice of
the redemption thereof to be given in the name of and at the expense of the
Company in the manner provided in Section 3A.05. Such notice having been duly
given, the redemption of such Securities shall be made upon the terms and in
the manner stated in Sections 3A.06, 3A.07 and 3A.08.
 
                                   ARTICLE 4
 
                                   Covenants
 
 Section 4.01. Payment of Securities.
 
 The Company shall pay the principal of and interest on the Securities of each
Series on the dates and in the manner provided in the Securities and in this
Indenture. An installment of principal or interest shall be considered paid on
the date due if the Trustee or Paying Agent (other than the Company or a Sub-
sidiary) holds on that date money designated for and sufficient to pay the in-
stallment.
<PAGE>
 
 
                                      26
 
 The Company shall pay interest on overdue principal at the respective rates
borne by such Securities or, in the case of Original Issue Discount Securi-
ties, at rates equal to the respective Yields to Maturity thereof; it shall
pay interest on overdue installments of interest at the respective rates borne
by such Securities to the extent lawful.
 
 Section 4.02. Maintenance of Office or Agency.
 
 Except as otherwise provided in the Authorizing Resolutions and/or supplemen-
tal indenture (if any) relating to any Series, the Company will maintain in
The City of New York, an office or agency where Securities may be surrendered
for registration of transfer or exchange or for presentation for payment and
where notices and demands to or upon the Company in respect to the Securities
and this Indenture may be served. The Company will give prompt written notice
to the Trustee of the location, and any change in the location, of such office
or agency. If at any time the Company shall fail to maintain any such required
office or agency or shall fail to furnish the Trustee with the address there-
of, such presentations, surrenders, notices and demands may be made or served
at the Corporate Trust Office.
 
 The Company may also from time to time designate one or more other offices or
agencies where the Securities of any Series or a particular Series may be pre-
sented or surrendered for any or all such purposes and may from time to time
rescind such designations; provided, that no such designation or rescission
shall in any manner relieve the Company of its obligation to maintain an of-
fice or agency in The City of New York, for such purposes. The Company will
give prompt written notice to the Trustee of any such designation or rescis-
sion and of any change in the location of any such other office or agency.
 
 The Company hereby initially designates the Trustee in The City of New York,
as an agency of the Company in accordance with Section 2.04.
 
 Section 4.03. Corporate Existence.
 
 Subject to Article 5 and Section 4.04, the Company will do or cause to be
done all things necessary to preserve and keep in full force and effect its
corporate existence and the rights (charter and statutory) and material fran-
chises of the Company; provided, however, that the Company shall not be re-
quired to preserve any such right or franchise if the Board of Directors or
management of the Company shall determine that the preservation thereof is no
longer desirable in
<PAGE>

 
                                      27
the conduct of the business of the Company and its Subsidiaries, taken as a
whole, and if the loss thereof is not, and will not be, adverse in any mate-
rial respect to the Holders.
 
 Section 4.04. Liquidation.
 
 The Board of Directors or the stockholders of the Company may not adopt a
plan of liquidation which provides for, contemplates or the effectuation of
which is preceded by (i) the sale, lease, conveyance or other disposition of
all or substantially all of the assets of the Company otherwise than substan-
tially as an entirety (Article 5 of this Indenture being the Article which
governs any such sale, lease, conveyance or other disposition substantially as
an entirety) and (ii) the distribution of all or substantially all of the pro-
ceeds of such sale, lease, conveyance or other disposition and of the remain-
ing assets of the Company to the holders of Capital Stock of the Company, un-
less the Company shall in connection with the adoption of such plan make pro-
visions for, or agree that prior to making any liquidating distributions it
will make provisions for, the satisfaction of the Company's obligations here-
under and under the Securities of each Series as to the payment of principal
and interest. The Company shall be deemed to make provision for such payments
only if (a) the Company delivers in trust to the Trustee or Paying Agent
(other than the Company or a Subsidiary) (i) in the case of any Securities of
any Series denominated in United States dollars, an amount of cash sufficient
to pay principal of and interest on such outstanding securities at their re-
spective Stated Maturities or U.S. Government Obligations in an aggregate
principal amount equal to the unpaid principal amount of such Securities and
having maturities and interest payment dates that shall coincide, as nearly as
may be practicable, with the dates that the principal of and interest on such
Securities are due and (ii) in the case of any Securities of any Series denom-
inated in any currency other than United States dollars, an amount of the Re-
quired Currency sufficient to pay principal of and interest on such outstand-
ing Securities at their respective Stated Maturities or (b) there is an ex-
press assumption of the due and punctual payment of the Company's obligations
hereunder and under the Securities of each Series and the performance and ob-
servance of all covenants and conditions to be performed by the Company here-
under, by the execution and delivery of a supplemental indenture in form sat-
isfactory to the Trustee by a person which acquires or will acquire (otherwise
than pursuant to a lease) a portion of the assets of the Company, and which
person will have assets (immediately after the acquisition) and aggregate net
earnings (for such person's four full fiscal quarters immediately preceding
the acquisition) equal to not less
<PAGE>
 
 
                                      28
than the assets of the Company (immediately preceding the acquisition) and the
aggregate net earnings of the Company (for its four full fiscal quarters imme-
diately preceding such acquisition), respectively, and which is organized and
existing under the laws of the United States, any State thereof or the Dis-
trict of Columbia; provided, however, that the Company shall not make any liq-
uidating distribution until after the Company shall have certified to the
Trustee with an Officers' Certificate and an Opinion of Counsel at least five
days prior to the making of any liquidating distribution that it has complied
with the provisions of this Section 4.04.
 
 Section 4.05. Compliance Certificate.
 
 The Company shall deliver to the Trustee within 90 days after the end of each
fiscal quarter of the Company an Officers' Certificate stating whether or not
the signers know of the existence of any Default or Event of Default by the
Company and whether all of the conditions and covenants of the Company are be-
ing complied with regardless of any period of grace or requirement of notice
provided under the Indenture. If they do know of such a Default or Event of
Default, the certificate shall describe the Default or Event of Default, as
the case may be, and its status. The first Officers' Certificate to be deliv-
ered pursuant to this Section 4.05 shall be for the fiscal quarter ending im-
mediately after the Original Issue Date.
 
 Section 4.06. SEC Reports.
 
 (a) The Company shall file with the Trustee within 15 days after it files
them with the SEC copies of the annual reports and of the information, docu-
ments and other reports (or copies of such portions of any of the foregoing as
the SEC may by rules and regulations prescribe) which the Company is required
to file with the SEC pursuant to Section 13 or 15(d) of the Securities Ex-
change Act of 1934, as amended. The Company also shall comply with the other
provisions of TIA (S) 314(a).
 
 (b) So long as the Securities of any Series remain outstanding, the Company
shall cause its annual report to stockholders and any quarterly or other fi-
nancial reports furnished by it to stockholders to be mailed to the Holders of
Securities outstanding at their adresses appearing in the Security Register.
<PAGE>
 
 
                                      29
 
 Section 4.07. Waiver of Stay, Extension or Usury Laws.
 
 The Company covenants (to the extent that it may lawfully do so) that it will
not at any time insist upon, plead, or in any manner whatsoever claim or take
the benefit or advantage of, any stay or extension law or any usury law or
other law, which would prohibit or forgive the Company from paying all or any
portion of the principal of and/or interest on the Securities of any Series as
contemplated herein, wherever enacted, now or at any time hereafter in force,
or which may affect the covenants or the performance of this Indenture; and
(to the extent that it may lawfully do so) the Company hereby expressly waives
all benefit or advantage of any such law, and covenants that it will not hin-
der, delay or impede the execution of any power herein granted to the Trustee,
but will suffer and permit the execution of every such power as though no such
law had been enacted.
 
 Section 4.08. Restrictions on Liens.
 
 The Company will not incur, create, assume or otherwise become liable in re-
spect of any Indebtedness secured by a Lien, or guarantee any Indebtedness
with a guarantee which is secured by a Lien, on any Principal Domestic Prop-
erty of the Company or any shares of stock or Indebtedness of any Significant
Subsidiary, without effectively providing that the Securities of each Series
(together with, if the Company shall so determine, any other Indebtedness of
the Company then existing or thereafter created ranking equally with the Secu-
rities of each Series) shall be secured equally and ratably with (or, at the
option of the Company, prior to) such secured Indebtedness, so long as such
secured Indebtedness shall be so secured; provided, however, that this Section
4.08 shall not apply to Indebtedness secured by:
 
  (1) Liens existing on the date of this Indenture;
 
  (2) Liens in favor of governmental bodies to secure progress, advance or
 other payments;
 
  (3) Liens existing on property, shares of stock or Indebtedness at the time
 of acquisition thereof (including acquisition through lease, merger or con-
 solidation) or Liens to secure the payment of all or any part of the pur-
 chase price thereof or the cost of construction, installation, renovation,
 improvement or development thereon or thereof or to secure any Indebtedness
 incurred prior to, at the time of, or within 360 days after the later of the
 acquisition, completion of such construction, installation, renovation, im-
 provement or development or the commencement of full operation of such prop-
 erty or within 360 days after the acquisition of such shares or Indebtedness
 for the purpose of financing all or any part of the purchase price thereof;
<PAGE>
 
 
                                      30
 
  (4) Liens securing Indebtedness in an aggregate amount which, at the time
 of incurrence and together with all outstanding Attributable Debt in respect
 of Sale and Leaseback Transactions permitted by clause (y) of the second
 paragraph of Section 4.09, does not exceed ten percent of the Consolidated
 Net Tangible Assets of the Company;
 
  (5) Liens to secure Indebtedness other than Funded Debt; and
 
  (6) any extension, renewal or replacement (or successive extensions, renew-
 als or replacements), as a whole or in part, of any Lien referred to in the
 foregoing clauses (1) to (5) inclusive; provided, that such extension, re-
 newal or replacement of such Lien is limited to all or any part of the same
 property, shares of stock or Indebtedness that secured the Lien extended,
 renewed or replaced (plus improvements on such property), and that such se-
 cured Indebtedness at such time is not increased.
 
 If at any time the Company shall incur, create, assume or otherwise become
liable in respect of any Indebtedness secured by a Lien, or guarantee any In-
debtedness with a guarantee which is secured by a Lien, on any Principal Do-
mestic Property of the Company or any shares of stock or Indebtedness of any
Significant Subsidiary other than as permitted under clauses (1) through (6)
of this Section 4.08, the Company shall promptly deliver to the Trustee (i) an
Officers' Certificate stating that the covenant of the Company to secure the
Securities equally and ratably with such secured Indebtedness pursuant to this
Section 4.08 has been complied with and (ii) an Opinion of Counsel that such
covenant has been complied with and that any instruments executed by the Com-
pany in performance of such covenant comply with the requirements of such cov-
enant.
 
 Section 4.09. Restrictions on Sales and Leasebacks.
 
 The Company will not sell or transfer any Principal Domestic Property of the
Company, with the Company taking back a lease of such Principal Domestic Prop-
erty of the Company (a "Sale and Leaseback Transaction"), unless (i) such
Principal Domestic Property of the Company is sold within 360 days from the
date of acquisition of such Principal Domestic Property of the Company or the
date of the completion of construction or commencement of full operations on
such Principal Domestic Property of the Company, whichever is later, or (ii)
the Company, within 120 days after such sale, applies or causes to be applied
to the retirement of Funded Debt of the Company or any Subsidiary (other than
Funded Debt of the Company which by its terms or the terms of the instrument
pursuant to which it was issued is subordinate in right of payment to the Se-
curities of each Series) an amount not less than the greater of (A) the net
proceeds of the sale of
<PAGE>
 
 
                                      31
such Principal Domestic Property of the Company or (B) the fair value (as de-
termined in any manner approved by the Board of Directors) of such Principal
Domestic Property of the Company.
 
 The provisions of this Section 4.09 shall not prevent a Sale and Leaseback
Transaction (x) if the lease entered into by the Company in connection there-
with is for a period, including renewals, of not more than 36 months or (y) if
the Company would, at the time of entering into such Sale and Leaseback Trans-
action, be entitled, without equally and ratably securing the Securities, to
create or assume a Lien on such Principal Domestic Property of the Company se-
curing Indebtedness in an amount at least equal to the Attributable Debt in
respect of such Sale and Leaseback Transaction pursuant to clause (4) of Sec-
tion 4.08.
 
                                   ARTICLE 5
 
                             Successor Corporation
 
 Section 5.01. When Company May Merge, etc.
 
 The Company shall not consolidate with or merge with or into any other corpo-
ration or transfer all or substantially all of its properties and assets as an
entirety to any person, unless:
 
  (1) either the Company shall be the continuing person, or the person (if
 other than the Company) formed by such consolidation or into which the Com-
 pany is merged or to which all or substantially all of the properties and
 assets of the Company as an entirety are transferred shall be a corporation
 organized and existing under the laws of the United States or any State
 thereof or the District of Columbia and shall expressly assume, by an inden-
 ture supplemental hereto, executed and delivered to the Trustee, in form
 satisfactory to the Trustee, all the obligations of the Company under the
 Securities of each Series and this Indenture;
 
  (2) immediately before and immediately after giving effect to such transac-
 tion, no Event of Default and no Default shall have occurred and be continu-
 ing; and
 
  (3) the Company shall have delivered to the Trustee an Officers' Certifi-
 cate and an Opinion of Counsel, each stating that such consolidation, merger
 or transfer and such supplemental indenture comply with this Article and
 that all conditions precedent herein provided for relating to such transac-
 tions have been complied with.
 
 Notwithstanding the foregoing, any Subsidiary may consolidate with, merge
with or into or transfer all or part of its properties and assets to the Com-
pany or any other Subsidiary or Subsidiaries.
<PAGE>
 
 
                                      32
 
 Section 5.02. Successor Corporation Substituted.
 
 Upon any consolidation or merger, or any transfer of all or substantially all
of the properties and assets of the Company in accordance with Section 5.01,
the successor corporation formed by such consolidation or into which the Com-
pany is merged or to which such transfer is made shall succeed to, and be sub-
stituted for, and may exercise every right and power of, the Company under
this Indenture with the same effect as if such successor corporation had been
named as the Company herein.
 
                                   ARTICLE 6
 
                             Default and Remedies
 
 Section 6.01. Events of Default.
 
 An "Event of Default" occurs if, with respect to any Series of Securities,
unless it is either inapplicable to a particular Series or it is specifically
deleted or modified in the Authorizing Resolution and/or supplemental inden-
ture (if any) in respect of such Series, and upon any other events which may
be specified as Events of Default in the Authorizing Resolution and/or supple-
mental indenture (if any) in respect of such Series:
 
  (1) the Company defaults in the payment of interest on any Securities of
 such Series when the same becomes due and payable and the default continues
 for a period of 30 days;
 
  (2) the Company defaults in the payment of the principal of any Securities
 of such Series when the same becomes due and payable at its Maturity or oth-
 erwise or defaults in the deposit of any Sinking Fund installment in respect
 of such Series, when and as payable by the terms of Section 3B.01 hereof;
 
  (3) the Company fails to comply with any of its other agreements contained
 in the Securities of such Series or this Indenture (other than an agreement
 relating exclusively to another Series of Securities) and the default con-
 tinues for the period and after the notice specified below;
 
  (4) the Company pursuant to or within the meaning of any Bankruptcy Law:
 
   (A) commences a voluntary case or proceeding,
 
   (B) consents to the entry of an order for relief against it in an invol-
  untary case or proceeding,
 
   (C) consents to the appointment of a Custodian of it or for all or sub-
  stantially all of its property, or
<PAGE>
 
 
                                      33
 
   (D) makes a general assignment for the benefit of its creditors; or
 
  (5) a court of competent jurisdiction enters an order or decree under any
 Bankruptcy Law that:
 
   (A) is for relief against the Company in an involuntary case or proceed-
  ing,
 
   (B) appoints a Custodian of the Company for all or substantially all of
  its properties, or
 
   (C) orders the liquidation of the Company,
 
 and in each case the order or decree remains unstayed and in effect for 60
 days.
 
 The term "Bankruptcy Law" means Title 11, U.S. Code or any similar Federal or
state law for the relief of debtors. The term "Custodian" means any receiver,
trustee, assignee, liquidator, sequestrator or similar official under any
Bankruptcy Law.
 
 A Default under clause (3) is not an Event of Default until the Trustee noti-
fies the Company, or the Holders of at least 25% in principal amount of the
outstanding Securities of such Series notify the Company and the Trustee, of
the Default and the Company does not cure the Default within 60 days after re-
ceipt of the notice. The notice must specify the Default, demand that it be
remedied and state that the notice is a "Notice of Default." When a Default is
cured, it ceases. Such notice shall be given by the Trustee if so requested by
the Holders of at least 25% in principal amount of the Securities of such Se-
ries then outstanding.
 
 Subject to the provisions of Sections 7.01 and 7.02, the Trustee shall not be
charged with knowledge of any Event of Default unless written notice thereof
shall have been given to a Trust Officer at the corporate trust office of the
Trustee by the Company, the Paying Agent, any Holder or an agent of any Hold-
er.
 
 Section 6.02. Acceleration.
 
 If an Event of Default (other than an Event of Default specified in Section
6.01(4) or (5)) with respect to Securities of any Series occurs and is contin-
uing, the Trustee may, by notice to the Company, or the Holders of at least
25% in principal amount of such Securities of such Series then outstanding
may, by notice to the Company and the Trustee, and the Trustee shall, upon the
request of such Holders, declare all unpaid principal (or, if such Securities
are Original Issue Discount Securities, such portion of the principal amount
as may then be
<PAGE>
 
 
                                      34
payable on acceleration as provided in the terms thereof) and accrued interest
to the date of acceleration on all such Securities of such Series then out-
standing (if not then due and payable) to be due and payable and, upon any
such declaration, the same shall become and be immediately due and payable. If
an Event of Default specified in Section 6.01(4) or (5) occurs, all unpaid
principal (or, if any Securities are Original Issue Discount Securities, such
portion of the principal amount as may then be payable on acceleration as pro-
vided in the terms thereof) and accrued interest on all Securities of every
Series then outstanding shall ipso facto become and be immediately due and
payable without any declaration or other act on the part of the Trustee or any
Securityholder. Upon payment of such principal amount and interest, all of the
Company's obligations under such Securities of such Series and this Indenture
with respect to such Securities of such Series, other than obligations under
Section 7.07, shall terminate. The Holders of a majority in principal amount
of the Securities of such Series then outstanding by notice to the Trustee may
rescind an acceleration and its consequences if (i) all existing Events of De-
fault, other than the non-payment of the principal of the Securities of such
Series which has become due solely by such declaration of acceleration, have
been cured or waived, (ii) to the extent the payment of such interest is law-
ful, interest on overdue installments of interest and overdue principal, which
has become due otherwise than by such declaration of acceleration, has been
paid, (iii) the rescission would not conflict with any judgment or decree of a
court of competent jurisdiction and (iv) all payments due to the Trustee and
any predecessor Trustee under Section 7.07 have been made. Anything herein
contained to the contrary notwithstanding, in the event of any acceleration
pursuant to this Section 6.02, the Company shall not be obligated to pay any
premium in connection with any repayment arising from an Event of Default.
 
 Section 6.03. Other Remedies.
 
 If an Event of Default occurs and is continuing, the Trustee may pursue any
available remedy by proceeding at law or in equity to collect the payment of
principal of or interest on the Securities of the Series as to which the Event
of Default shall have occurred or to enforce the performance of any provision
of such Securities or the Indenture.
 
 The Trustee may maintain a proceeding even if it does not possess any of the
Securities of the Series as to which the Event of Default shall have occurred
or does not produce any of them in the proceeding. A delay or omission by the
Trustee or any Securityholder in exercising any right or remedy accruing upon
<PAGE>
 
 
                                      35
an Event of Default shall not impair the right or remedy or constitute a
waiver of or acquiescence in the Event of Default. No remedy is exclusive of
any other remedy. All available remedies are cumulative to the extent permit-
ted by law.
 
 Section 6.04. Waiver of Past Defaults.
 
 Subject to Sections 6.07 and 9.02, the Holders of a majority in principal
amount of the outstanding Securities of a Series by written notice to the
Trustee may waive an existing Default or Event of Default and its conse-
quences, except a Default in the payment of principal of or interest on any
such Security as specified in clauses (1) and (2) of Section 6.01. When a De-
fault or Event of Default is waived, it is cured and ceases.
 
 Section 6.05. Control by Majority.
 
 The Holders of a majority in principal amount of the outstanding Securities
of a Series (or, if more than one Series is affected, of all such Series vot-
ing as a single class) may 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 it. However, the Trustee may refuse to follow any direction
that conflicts with any law or this Indenture that the Trustee determines may
be unduly prejudicial to the rights of another Securityholder, or that may in-
volve the Trustee in personal liability; provided that the Trustee may take
any other action deemed proper by the Trustee which is not inconsistent with
such direction.
 
 Section 6.06. Limitation on Suits.
 
 A Securityholder may not pursue any remedy with respect to this Indenture or
the Securities of the applicable Series unless:
 
  (1) the Holder gives to the Trustee written notice of a continuing Event of
 Default;
 
  (2) the Holders of at least 25% in principal amount of the outstanding Se-
 curities of the Series in respect of which the Event of Default has occurred
 make a written request to the Trustee to pursue a remedy;
 
  (3) such Holder or Holders offer to the Trustee indemnity satisfactory to
 the Trustee against any loss, liability or expense;
 
  (4) the Trustee does not comply with the request within 60 days after re-
 ceipt of the request and the offer of indemnity; and
 
  (5) during such 60-day period the Holders of a majority in principal amount
 of the outstanding Securities of such Series do not give the Trustee a di-
 rection which, in the opinion of the Trustee, is inconsistent with the re-
 quest.
<PAGE>
 
 
                                      36
 
 A Holder of Securities of any Series may not use this Indenture to prejudice
the rights of any other Holders of Securities of that Series or to obtain a
preference or priority over any other Holders of Securities of that Series.
 
 Section 6.07. Rights of Holders to Receive Payment.
 
 Notwithstanding any other provision of this Indenture, the right of any
Holder to receive payment of principal of and interest on the Security, on or
after the respective due dates expressed in such Security, or to bring suit
for the enforcement of any such payment on or after such respective dates,
shall not be impaired or affected without the consent of such Holder.
 
 Section 6.08. Collection Suit by Trustee.
 
 If an Event of Default in payment of interest or principal specified in Sec-
tion 6.01(1) or (2) occurs and is continuing, the Trustee may recover judgment
in its own name and as trustee of an express trust against the Company or any
other obligor on the Securities of the Series in respect of which the Event of
Default has occurred for the whole amount of principal and accrued interest
remaining unpaid, together with interest overdue on principal or, in the case
of Original Issue Discount Securities, the then accreted value, and to the ex-
tent that payment of such interest is lawful, interest on overdue installments
of interest, in each case at the rate per annum borne by such Securities or,
in the case of Original Issue Discount Securities, at a rate equal to the
Yield to Maturity thereof, and such further amount as shall be sufficient to
cover the costs and expenses of collection, including the reasonable compensa-
tion, expenses, disbursements and advances of the Trustee, its agents and
counsel.
 
 Section 6.09. Trustee May File Proofs of Claim.
 
 The Trustee may file such proofs of claim and other papers or documents as
may be necessary or advisable in order to have the claims of the Trustee (in-
cluding any claim for the reasonable compensation, expenses, disbursements and
advances of the Trustee, its agents and counsel) and the Securityholders al-
lowed in any judicial proceedings relative to the Company (or any other obli-
gor upon the Securities), its creditors or its property and shall be entitled
and empowered to collect and receive any monies or other property payable or
deliverable on any such claims and to distribute the same, and any Custodian
in any such judicial proceedings is hereby authorized by each Securityholder
to make such payments to the Trustee and, in the event that the Trustee shall
consent to the making of
<PAGE>

 
                                      37
such payments directly to the Securityholders, to pay to the Trustee any
amount due to it for the reasonable compensation, expenses, disbursements and
advances of the Trustee, its agents and counsel, and any other amounts due the
Trustee under Section 7.07. Nothing herein contained shall be deemed to autho-
rize the Trustee to authorize or consent to or accept or adopt on behalf of
any Securityholder any plan of reorganization, arrangement, adjustment or com-
position affecting the Securities of any Series or the rights of any Holder
thereof, or to authorize the Trustee to vote in respect of the claim of any
Securityholder in any such proceeding.
 
 Section 6.10. Priorities.
 
 If the Trustee collects any money or property pursuant to this Article 6 with
respect to Securities of a Series, it shall pay out the money or property in
the following order:
 
  First: to the Trustee for amounts due under Section 7.07;
 
  Second: to Holders for amounts due and unpaid on the Securities of such Se-
 ries in respect of which monies have been collected for principal and inter-
 est, ratably, without preference or priority of any kind, according to the
 amounts due and payable on such Securities for principal and interest, re-
 spectively; and
 
  Third: to the Company.
 
 The Trustee, upon prior written notice to the Company, may fix a record date
and payment date for any payment to Securityholders pursuant to this Section
6.10.
 
 Section 6.11. Undertaking for Costs.
 
 In any suit for the enforcement of any right or remedy under this Indenture
or in any suit against the Trustee for any action taken or omitted by it as
Trustee, a court in its discretion may require the filing by any party liti-
gant in the suit of an undertaking to pay the costs of the suit, and the court
in its discretion may assess reasonable costs, including reasonable attorneys'
fees, against any party litigant in the suit, having due regard to the merits
and good faith of the claims or defenses made by the party litigant. This Sec-
tion 6.11 does not apply to a suit by the Trustee, a suit by a Holder pursuant
to Section 6.07, or a suit by any Holder or a group of Holders of more than
10% in principal amount of the outstanding Securities of all Series (or, if
the matter in issue does not relate to all Series of Securities, then the
Holders of 10% in principal amount of the outstanding Securities of all Series
to which such issue relates) (treated as a single class).
<PAGE>
 
 
                                      38
 
                                   ARTICLE 7
 
                                    Trustee
 
 Section 7.01. Duties of Trustee.
 
 (a) The Trustee, except during the continuance of an Event of Default known
to it pursuant to Section 6.01, undertakes to perform such duties and only
such duties as are specifically set forth in this Indenture. If an Event of
Default known to the Trustee pursuant to Section 6.01 has occurred and is con-
tinuing, 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 person would exercise or use under the circumstances in the con-
duct of his own affairs.
 
 (b) Except during the continuance of an Event of Default known to the Trustee
pursuant to Section 6.01:
 
  (1) the Trustee need perform only those duties as are specifically set
 forth in this Indenture and no others and no implied covenants or obliga-
 tions shall be read into this Indenture against the Trustee;
 
  (2) in the absence of bad faith on its part, the Trustee may conclusively
 rely, as to the truth of the statements and the correctness of the opinions
 expressed therein, upon certificates or opinions furnished to the Trustee
 and conforming to the requirements of this Indenture; however, the Trustee
 shall examine the certificates and opinions to determine whether or not they
 conform to the requirements of this Indenture.
 
 (c) The Trustee may not be relieved from liability for its own negligent ac-
tion, its own negligent failure to act, or its own willful misconduct, except
that:
 
  (1) this paragraph does not limit the effect of paragraphs (a) and (b) of
 this Section 7.01;
 
  (2) the Trustee shall not be liable for any error of judgment made in good
 faith by a Trust Officer, unless it is proved that the Trustee was negligent
 in ascertaining the pertinent facts;
 
  (3) the Trustee shall not be liable with respect to any action it takes or
 omits to take in good faith in accordance with a direction received by it
 pursuant to Section 6.05.
 
 (d) No provision of this Indenture shall require the Trustee to expend or
risk its own funds or otherwise incur any financial liability in the perfor-
mance of any of its duties hereunder or in the exercise of any of its rights
or powers if it shall have reasonable grounds for believing that repayment of
such funds or adequate indemnity against such risk or liability is not reason-
ably assured to it.
<PAGE>
 
 
                                      39
 
 (e) Every provision of this Indenture that in any way relates to the Trustee
is subject to paragraphs (a), (b), (c) and (d) of this Section 7.01.
 
 (f) The Trustee shall not be liable for interest on any money received by it
except as the Trustee may agree with the Company in writing. Money held in
trust by the Trustee need not be segregated from other funds except to the ex-
tent required by law.
 
 Section 7.02. Rights of Trustee.
 
 Subject to Section 7.01:
 
  (a) the Trustee may rely on any document believed by it to be genuine and
 to have been signed or presented by the proper person; the Trustee need not
 investigate any fact or matter stated in the document;
 
  (b) before the Trustee acts or refrains from acting, it may require an Of-
 ficers' Certificate or an Opinion of Counsel, which shall conform to Section
 10.05; the Trustee shall not be liable for any action it takes or omits to
 take in good faith in reliance on such certificate or opinion;
 
  (c) the Trustee may act through its attorneys and agents and shall not be
 responsible for the misconduct or negligence of any agent appointed with due
 care;
 
  (d) the Trustee shall not be liable for any action it takes or omits to
 take in good faith which it reasonably believes to be authorized or within
 its rights or powers;
 
  (e) the Trustee may consult with counsel and the advice or opinion of such
 counsel as to matters of law shall be full and complete authorization and
 protection in respect of any action taken, omitted or suffered by it hereun-
 der in good faith and in accordance with the advice or opinion of such coun-
 sel; and
 
  (f) 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 the
 Holders, including, without limitation, the duties, rights and powers speci-
 fied in Section 6.02 hereof, unless such Holders have offered to the Trustee
 reasonable security or indemnity against the costs, expenses and liabilities
 which might be incurred by the Trustee in compliance with such request or
 action.
 
 Section 7.03. Individual Rights of Trustee.
 
 The Trustee in its individual or any other capacity may become the owner or
pledgee of Securities and may otherwise deal with the Company or its Affili-
ates with the same rights it would have if it were not Trustee. Any Agent may
do the same with like rights. However, the Trustee is subject to Sections 7.10
and 7.11.
<PAGE>
 
 
                                      40
 
 Section 7.04. Trustee's Disclaimer.
 
 The Trustee makes no representation as to the validity or adequacy of this
Indenture or the Securities of any Series, it shall not be accountable for the
recitals contained in this Indenture or for the Company's use of the proceeds
from the Securities of any Series, and it shall not be responsible for any
statement in the Securities of any Series, or in any prospectus used to sell
the Securities of any Series, other than its certificate of authentication.
 
 Section 7.05. Notice of Defaults.
 
 If a Default or an Event of Default occurs and is continuing with respect of
any Series of Securities, and if it is actually known to the Trustee pursuant
to Section 6.01 hereof, the Trustee shall mail to each Holder of the Securi-
ties of such Series notice of the Default or Event of Default within 75 days
after it occurs. Except in the case of a Default or an Event of Default in
payment of principal of or interest on any Security or in the payment of any
Sinking Fund installment, the Trustee may withhold such notice if and so long
as a committee of its Trust Officers in good faith determines that withholding
the notice is in the interest of Securityholders.
 
 Section 7.06. Reports by Trustee to Holders.
 
 The Trustee shall transmit to the Holder such reports concerning, among other
things, the Trustee and its action under this Indenture as may be required
pursuant to the TIA at the time and in compliance with TIA (S) 313(a). The
Trustee also shall comply with TIA (S) 313(b)(2) and 313(c).
 
 A copy of each such report at the time of its mailing to Securityholders
shall be filed with the SEC and each stock exchange, if any, on which the Se-
curities of any Series are listed.
 
 The Company shall notify the Trustee if the Securities of any Series become
listed on any stock exchange.
 
 Section 7.07. Compensation and Indemnity.
 
 The Company shall pay to the Trustee from time to time such compensation as
shall be agreed upon in writing by the Company and the Trustee. The Trustee's
compensation shall not be limited by any law on compensation of a trustee of
an express trust. The Company shall reimburse the Trustee upon request for
<PAGE>
 
 
                                      41
all reasonable disbursements, expenses and advances incurred or made by it.
Such expenses shall include the reasonable compensation, disbursements and ex-
penses of the Trustee's agents and counsel.
 
 The Company shall indemnify the Trustee for, and hold it harmless against,
any loss or liability incurred by it in connection with the administration of
this trust and its duties hereunder, including the reasonable expenses of de-
fending itself against any claim of liability arising hereunder. The Trustee
shall notify the Company promptly of any claim asserted against the Trustee
for which it may seek indemnity. The Company need not pay for any settlement
made without its written consent, which consent shall not be unreasonably
withheld. The Company need not reimburse any expense or indemnify against any
loss or liability incurred by the Trustee through negligence or bad faith.
 
 To secure the Company's payment obligations in this Section 7.07, the Trustee
shall have a lien prior to the Securities of each Series on all money or prop-
erty held or collected by the Trustee, in its capacity as Trustee, except
money or property held in trust to pay principal of or interest on particular
Securities.
 
 When the Trustee incurs expenses or renders services after an Event of De-
fault specified in Section 6.01(4) or (5) occurs, the expenses and the compen-
sation for the services are intended to constitute expenses of administration
under any Bankruptcy Law.
 
 Section 7.08. Replacement of Trustee.
 
 The Trustee may resign by so notifying the Company in writing. The Holders of
a majority in principal amount of the outstanding Securities of all Series
(voting as a single class) may remove the Trustee by so notifying the Trustee
in writing and may appoint a successor Trustee with the Company's consent.
Pursuant to a Company Order, the Company may remove the Trustee if:
 
  (1) the Trustee fails to comply with Section 7.10;
 
  (2) the Trustee is adjudged a bankrupt or an insolvent;
 
  (3) a receiver or other public officer takes charge of the Trustee or its
 property; or
 
  (4) the Trustee becomes incapable of acting.
 
 If the Trustee resigns or is removed or if a vacancy exists in the office of
Trustee for any reason, the Company shall promptly appoint a successor Trust-
ee. Within one year after the successor Trustee takes office, the Holders of a
majority
<PAGE>
 
 
                                      42
in principal amount of the Securities of all Series (voting as a single class)
may appoint a successor Trustee to replace the successor Trustee appointed by
the Company.
 
 A successor Trustee shall deliver a written acceptance of its appointment to
the retiring Trustee and to the Company. Immediately after that, the retiring
Trustee shall transfer, after payment of all sums then owing to the Trustee
pursuant to Section 7.07, all property and documentation held by it as Trustee
to the successor Trustee, subject to the lien provided in Section 7.07, the
resignation or removal of the retiring Trustee shall become effective, and the
successor Trustee shall have all the rights, powers and duties of the Trustee
under this Indenture. A successor Trustee shall mail notice of its succession
to each Securityholder.
 
 If a successor Trustee does not take office within 60 days after the retiring
Trustee resigns or is removed, the retiring Trustee, the Company or the Hold-
ers of at least 10% in principal amount of the outstanding Securities of all
Series (voting as a single class) may petition any court of competent juris-
diction for the appointment of a successor Trustee.
 
 If the Trustee fails to comply with Section 7.10, any Securityholder may pe-
tition any court of competent jurisdiction for the removal of the Trustee and
the appointment of a successor Trustee. Any successor Trustee shall comply
with TIA (S) 310(a)(5).
 
 Notwithstanding replacement of the Trustee pursuant to this Section 7.08, the
Company's obligations under Section 7.07 shall continue for the benefit of the
retiring Trustee.
 
 Section 7.09. Successor Trustee by Merger, etc.
 
 If the Trustee consolidates with, merges or converts into, or transfers all
or substantially all of its corporate trust business to, another corporation,
the resulting, surviving or transferee corporation without any further act
shall be the successor Trustee.
 
 Section 7.10. Eligibility; Disqualification.
 
 This Indenture shall always have a Trustee who satisfies the requirements of
TIA (S) 310(a)(1). The Trustee shall have a combined capital and surplus of at
least $50,000,000 as set forth in its most recent published annual report of
condition. The Trustee shall comply with TIA (S) 310(b), including the provi-
sion permitted by the second sentence of TIA (S) 310(b).
<PAGE>
 
 
                                      43
 
 Section 7.11. Preferential Collection of Claims Against Company.
 
 The Trustee shall comply with TIA (S) 311(a), excluding from the operation of
(S) 311(a) any creditor relationship listed in TIA (S) 311(b). A Trustee who
has resigned or been removed shall be subject to TIA (S) 311(a) to the extent
indicated.
 
                                   ARTICLE 8
 
                            Discharge of Indenture
 
 Section 8.01. Termination of Company's Obligations.
 
 The Company may terminate its obligations under the Securities of any Series
and this Indenture with respect to such Series, except those obligations re-
ferred to in the immediately succeeding paragraph, (a) if all Securities of
such Series previously authenticated and delivered (other than destroyed, lost
or stolen Securities of such Series which have been replaced or paid or Secu-
rities of such Series for whose payment money or securities have theretofore
been held in trust and thereafter repaid to the Company, as provided in Sec-
tion 8.03) have been delivered to the Trustee for cancellation and the Company
has paid all sums payable by it hereunder, or (b) if, following the date on
which the Company shall have given notice to the Trustee of its intention to
defease all of the Securities of such Series, the Company has irrevocably de-
posited or caused to be deposited with the Trustee or a Paying Agent (other
than the Company or a Subsidiary), under the terms of an irrevocable trust
agreement in form and substance satisfactory to the Trustee and any such Pay-
ing Agent, as trust funds in trust solely for the benefit of the Holders for
that purpose, (i) in the case of any Securities of any Series denominated in
United States dollars, an amount of cash sufficient to pay principal of and
interest on such outstanding Securities at their respective Stated Maturities,
or direct non-callable obligations of, or non-callable obligations guaranteed
by, the United States of America for the payment of which guarantee or obliga-
tion the full faith and credit of the United States is pledged, including but
not limited to depository receipts issued by a bank as custodian with respect
to any such security held by the custodian for the benefit of the holder of
such depository receipt ("U.S. Government Obligations"), maturing as to prin-
cipal and interest in such amounts and at such times as are sufficient without
consideration of any reinvestment of such interest, to pay principal of and
interest on such outstanding Securities at their respective Stated Maturities
and (ii) in the case of any Securities of any Series denominated in any cur-
rency other than United States dollars, an amount of the Required Currency
sufficient
<PAGE>
 
 
                                      44
to pay principal of and interest on such outstanding Securities at their re-
spective Stated Maturities; provided that the Trustee or such Paying Agent
shall have been irrevocably instructed to apply such cash, the proceeds of
such U.S. Government Obligations or the Required Currency, as the case may be,
to the payment of said principal and interest with respect to the Securities
of such Series; and provided further, that if such irrevocable deposit in
trust with the Trustee of cash, U.S. Government Obligations or the Required
Currency, as the case may be, is made on or prior to one year from the Stated
Maturity for payment of principal of the Securities of the applicable Series,
the Company shall have delivered to the Trustee either an Opinion of Counsel
with no material qualifications in form and substance satisfactory to the
Trustee to the effect that Holders of such Securities (i) will not recognize
income, gain or loss for Federal income tax purposes as a result of such de-
posit (and the defeasance contemplated in connection therewith) and (ii) will
be subject to Federal income tax on the same amounts and in the same manner
and at the same times as would have been the case if such deposit and defea-
sance had not occurred, or an applicable favorable ruling to that effect re-
ceived from or published by the Internal Revenue Service.
 
 Notwithstanding the foregoing paragraph, the Company's obligations in Sec-
tions 2.04, 2.05, 2.06, 2.07, 2.08, 4.01, 4.02, 7.07, 7.08, 8.03 and 8.04, and
except as otherwise provided in the Authorizing Resolution and/or the supple-
mental indenture (if any) in respect of any Series, shall survive until the
Securities are no longer outstanding. Thereafter, the Company's obligations in
Sections 7.07, 8.03 and 8.04 shall survive.
 
 After any such irrevocable deposit the Trustee upon request shall acknowledge
in writing the discharge of the Company's obligations under the Securities of
the applicable Series and this Indenture with respect to such Series except
for those surviving obligations specified above.
 
 Section 8.02. Application of Trust Money.
 
 The Trustee or Paying Agent shall hold in trust cash, U.S. Government Obliga-
tions or the Required Currency, as the case may be, deposited with it pursuant
to Section 8.01, and shall apply the deposited cash, the money from U.S. Gov-
ernment Obligations or the Required Currency, as the case may be, in accor-
dance with this Indenture to the payment of principal of and interest on the
Securities.
<PAGE>
 
 
                                      45
 
 Section 8.03. Repayment to Company.
 
 Subject to Section 8.01, the Trustee and the Paying Agent shall promptly pay
to the Company upon request any excess money held by them at any time. Subject
to the provisions of applicable law, the Trustee and the Paying Agent shall
pay to the Company upon request any money held by them for the payment of
principal or interest that remains unclaimed for two years; provided, however,
the Trustee or such Paying Agent before being required to make any payment may
at the expense of the Company cause to be published once in a newspaper of
general circulation in The City of New York or mail to each Holder entitled to
such money notice that such money remains unclaimed and that, after a date
specified therein which shall be at least 30 days from the date of such publi-
cation or mailing, any unclaimed balance of such money then remaining will be
repaid to the Company. After payment to the Company, the Trustee shall be re-
leased from all further liability with respect to such money and
Securityholders entitled to money must look to the Company for payment as gen-
eral creditors unless an applicable abandoned property law designates another
person.
 
 Section 8.04. Reinstatement.
 
 If the Trustee or Paying Agent is unable to apply any cash, U.S. Government
Obligations or the Required Currency, as the case may be, in accordance with
Section 8.01 by reason of any legal proceeding or by reason of any order or
judgment of any court or governmental authority enjoining, restraining or oth-
erwise prohibiting such application, the Company's obligations under this In-
denture (with respect to the applicable Series) and the Securities of the ap-
plicable Series shall be revived and reinstated as though no deposit had oc-
curred pursuant to Section 8.01 until such time as the Trustee or Paying Agent
is permitted to apply all such cash, U.S. Government Obligations and Required
Currency, as the case may be, in accordance with Section 8.01; provided, how-
ever, that if the Company has made any payment of interest on or principal of
any Securities of any Series because of the reinstatement of its obligations,
the Company shall be subrogated to the rights of the Holders of such Securi-
ties to receive such payment from the cash, U.S. Government Obligations or the
Required Currency, as the case may be, held by the Trustee or Paying Agent.
 
 Section 8.05. Indemnity for U.S. Government Obligations.
 
 The Company shall pay, and shall indemnify the Trustee against, any tax, fee
or other charge imposed on or assessed against U.S. Government Obligations
<PAGE>
 
 
                                      46
deposited pursuant to Section 8.01 or the principal and interest received on
such U.S. Government Obligations.
 
                                   ARTICLE 9
 
                      Amendments, Supplements and Waivers
 
 Section 9.01. Without Consent of Holders.
 
 The Company, when authorized by a Board Resolution, and the Trustee may amend
or supplement this Indenture or the Securities of any Series without notice to
or consent of any Securityholder:
 
  (1) to cure any ambiguity, defect or inconsistency;
 
  (2) to comply with Article 5;
 
  (3) to provide for uncertificated Securities in addition to certificated
 Securities;
 
  (4) to secure the Securities in connection with Section 4.08;
 
  (5) to make any change that does not adversely affect the rights of any
 Securityholder of such Series;
 
  (6) to provide for the issuance and the terms of any particular Series of
 Securities, the rights and obligations of the Company and the Holders of the
 Securities of such Series, the form or forms of the Securities of such Se-
 ries and such other matters in connection therewith as the Board of Direc-
 tors of the Company shall authorize, including, without limitation, provi-
 sions for (a) additional or different covenants, restrictions or conditions
 applicable to such Series, (b) additional or different Events of Default in
 respect of such Series, (c) a longer or shorter period of grace and/or no-
 tice in respect of any provision applicable to such Series than is provided
 in Section 6.01, (d) immediate enforcement of any Event of Default in re-
 spect of such Series or (e) limitations upon the remedies available in re-
 spect of any Events of Default in respect of such Series or upon the rights
 of the holders of Securities of such Series to waive any such Event of De-
 fault; provided, that this paragraph (6) shall not be deemed to require the
 execution of a supplemental indenture to provide for the issuance of any Se-
 ries of Securities unless the same shall be provided for in the Authorizing
 Resolution relating thereto; or
 
  (7) to provide for a separate Trustee for one or more Series.
 
 Section 9.02. With Consent of Holders.
 
 Subject to Section 6.07, with the written consent of the Holders of at least
a majority in principal amount of the outstanding Securities of all Series af-
fected
<PAGE>
 
 
                                      47
thereby (voting as a single class), the Company, when authorized by a Board
Resolution, and the Trustee may amend or supplement this Indenture or such Se-
curities without notice to any Securityholder. Subject to Section 6.07, the
Holders of a majority in principal amount of the outstanding Securities of all
Series affected thereby (voting as a single class) may waive compliance by the
Company with any provision of this Indenture or such Securities without notice
to any Securityholder; provided, that, only the holders of a majority in prin-
cipal amount of Securities of a particular Series may waive compliance with a
provision of this Indenture or the Securities of such Series having applica-
bility solely to such Series. However, without the consent of each
Securityholder affected, an amendment, supplement or waiver, including a
waiver pursuant to Section 6.04, may not:
 
  (1) reduce the amount of Securities of such Series or all Series (voting as
 a single class), as the case may be, whose Holders must consent to an amend-
 ment, supplement or waiver;
 
  (2) reduce the rate or change the Stated Maturity for payment of interest
 on any Security;
 
  (3) reduce the principal or any premium payable upon the redemption of or
 change the Stated Maturity of any Security;
 
  (4) waive a Default in the payment of the principal of or interest on any
 Security;
 
  (5) make any changes in Section 6.04, 6.07 or the third sentence of this
 Section 9.02; or
 
  (6) make any Security payable in money other than that stated in the Secu-
 rity.
 
A supplemental indenture which changes or eliminates any covenant or other
provision of this Indenture which has expressly been included solely for the
benefit of one or more particular Series of Securities, or which modifies the
rights of the Holders of Securities of such Series with respect to such cove-
nant or other provision, shall be deemed not to affect the rights under the
Indenture of the Holders of Securities of any other Series.
 
 It shall not be necessary for the consent of the Holders under this Section
to approve the particular form of any proposed amendment, supplement or waiv-
er, but it shall be sufficient if such consent approves the substance thereof.
 
 After an amendment, supplement or waiver under this Section becomes effec-
tive, the Company shall mail to the Holders affected thereby a notice briefly
<PAGE>
 
 
                                      48
describing the amendment, supplement or waiver. 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.
 
 Section 9.03. Compliance with Trust Indenture Act.
 
 Every amendment to or supplement of this Indenture or the Securities shall
comply with the TIA as then in effect.
 
 Section 9.04. Revocation and Effect of Consents.
 
 Until an amendment or waiver becomes effective, a consent to it by a Holder
is a continuing consent by the Holder and every subsequent Holder of such Se-
curity or portion of such Security that evidences the same debt as the con-
senting Holder's Security, even if notation of the consent is not made on any
Security. However, any such Holder or subsequent Holder may revoke in writing
the consent as to his Security or portion of a Security. Such revocation shall
be effective only if the Trustee receives the written notice of revocation be-
fore the date the amendment, supplement or waiver becomes effective.
 
 The Company may, but shall not be obligated to, fix a record date for the
purpose of determining the Holders entitled to consent to any amendment, sup-
plement or waiver which shall be at least 30 days prior to the first solicita-
tion of such consent. If a record date is fixed, then notwithstanding the last
two sentences of the immediately preceding paragraph, those persons who were
Holders at such record date (or their duly designated proxies), and only those
persons, shall be entitled to consent to such amendment, supplement or waiver
or to revoke any consent previously given, whether or not such persons con-
tinue to be Holders after such record date. No such consent shall be valid or
effective for more than 90 days after such record date.
 
 After an amendment, supplement or waiver becomes effective, it shall bind ev-
ery Holder of a Security of such Series, unless it makes a change described in
any of clauses (1) through (6) of Section 9.02. In that case the amendment,
supplement or waiver shall bind each Holder of a Security who has consented to
it and every subsequent Holder of a Security or portion of a Security of the
same Series that evidences the same debt as the consenting Holder's Security.
<PAGE>
 
 
                                      49
 
 Section 9.05. Notation On or Exchange of Securities.
 
 If an amendment, supplement or waiver changes the terms of a Security, the
Trustee may require the Holder of the Security to deliver it to the Trustee.
The Trustee may place an appropriate notation on the Security about the
changed terms and return it to the Holder. Alternatively, if the Company or
the Trustee so determines, the Company in exchange for the Security shall is-
sue and the Trustee shall authenticate a new Security of the same Series that
reflects the changed terms.
 
 Section 9.06. Trustee to Sign Amendments, etc.
 
 The Trustee shall be entitled to receive, and shall be fully protected in re-
lying upon, an Officers' Certificate and an Opinion of Counsel stating that
the execution of any amendment, supplement or waiver authorized pursuant to
this Article 9 is authorized or permitted by this Indenture. The Trustee may,
but shall not be obligated to, execute any such amendment, supplement or
waiver which affects the Trustee's own rights, duties or immunities under this
Indenture or otherwise.
 
                                  ARTICLE 10
 
                                 Miscellaneous
 
 Section 10.01. Trust Indenture Act Controls.
 
 If any provision of this Indenture limits, qualifies, or conflicts with an-
other provision which is required to be included in this Indenture by the TIA,
the required provision shall control.
 
 Section 10.02. Notices.
 
 Any notice or communication shall be sufficiently given if in writing and de-
livered in person or mailed by first-class mail addressed as follows:
 
  if to the Company:
 
   The Coastal Corporation
   Coastal Tower
   Nine Greenway Plaza
   Houston, Texas 77046-0995
   Attention: Director, Financial Administration
<PAGE>
 
 
                                      50
 
  if to the Trustee: Harris Trust and Savings Bank
                     c/o Bank of Montreal Trust Company
                     Wall Street Plaza
                     88 Pine Street
                     New York, New York 10005
                     Attention:
 
 The Company or the Trustee by notice to the other may designate additional or
different addresses for subsequent notices or communications.
 
 Any notice or communication mailed to a Securityholder shall be mailed to him
at his address as it appears on the Security Register and shall be suffi-
ciently given to him if so mailed within the time prescribed.
 
 Failure to mail a notice or communication to a Securityholder or any defect
in it shall not affect its sufficiency with respect to other Securityholders.
Except for a notice to the Trustee, which is deemed given only when received,
if a notice or communication is mailed in the manner provided above, it is
duly given, whether or not the addressee receives it.
 
 Section 10.03. Communications by Holders With Other Holders.
 
 Securityholders may communicate pursuant to TIA (S) 312(b) with other
Securityholders with respect to their rights under this Indenture or the Secu-
rities of an applicable Series. The Company, the Trustee, the Registrar and
any other person shall have the protection of TIA (S) 312(c).
 
 Section 10.04. Certificate and Opinion as to Conditions Precedent.
 
 Upon any request or application by the Company to the Trustee to take any ac-
tion under this Indenture, the Company shall furnish to the Trustee:
 
  (1) an Officers' Certificate stating that, in the opinion of the signers,
 all conditions precedent, if any, provided for in this Indenture relating to
 the proposed action have been complied with; and
 
  (2) an Opinion of Counsel stating that, in the opinion of such counsel, all
 such conditions precedent have been complied with.
 
 Section 10.05. Statements Required in Certificate or Opinion.
 
 Each certificate or opinion with respect to compliance with a condition or
covenant provided for in this Indenture, other than the Officers' Certificate
required by Section 4.05, shall include:
 
  (1) a statement that the person making such certificate or opinion has read
 such covenant or condition;
<PAGE>
 
 
                                      51
 
  (2) a brief statement as to the nature and scope of the examination or in-
 vestigation upon which the statements or opinions contained in such certifi-
 cate or opinion are based;
 
  (3) a statement that, in the opinion of such person, he has made such exam-
 ination or investigation as is necessary to enable him to express an in-
 formed opinion as to whether or not such covenant or condition has been com-
 plied with; and
 
  (4) a statement as to whether or not, in the opinion of such person, such
 condition or covenant has been complied with; provided, however, that with
 respect to matters of fact an Opinion of Counsel may rely on an Officers'
 Certificate or certificates of public officials.
 
 Section 10.06. Rules by Trustee, Paying Agent, Registrar.
 
 The Trustee may make reasonable rules for action by or at a meeting of
Securityholders. The Paying Agent or Registrar may make reasonable rules for
its functions.
 
 Section 10.07. Legal Holidays.
 
 A "Legal Holiday" is a Saturday, a Sunday or a day on which banking institu-
tions in New York, New York are not required to be open. If a payment date is
a Legal Holiday at a place of payment, payment may be made at that place on
the next succeeding day that is not a Legal Holiday, and no interest shall ac-
crue for the intervening period.
 
 Section 10.08. Governing Law.
 
 THE LAWS OF THE STATE OF NEW YORK SHALL GOVERN THIS INDENTURE AND THE SECURI-
TIES WITHOUT REGARD TO PRINCIPLES OF CONFLICTS OF LAW.
 
 Section 10.09. No Adverse Interpretation of Other Agreements.
 
 This Indenture may not be used to interpret another indenture, loan or debt
agreement of the Company or any of its Subsidiaries. Any such indenture, loan
or debt agreement may not be used to interpret this Indenture.
 
 Section 10.10. No Recourse Against Others.
 
 A director, officer, employee or stockholder, as such, of the Company shall
not have any liability for any obligations of the Company under the Securities
or the
<PAGE>
 
 
                                      52
Indenture or for any claim based on, in respect of or by reason of such obli-
gations or their creation. Each Securityholder by accepting a Security waives
and releases all such liability.
 
 Section 10.11. Successors.
 
 All agreements of the Company in this Indenture and the Securities shall bind
its successor. All agreements of the Trustee in this Indenture shall bind its
successor.
 
 Section 10.12. Duplicate Originals.
 
 The parties may sign any number of copies of this Indenture. Each signed copy
shall be an original, but all of them together represent the same agreement.
 
 Section 10.13. Separability.
 
 In case any provision in this Indenture or in the Securities shall be inval-
id, illegal or unenforceable, the validity, legality and enforceability of the
remaining provisions shall not in any way be affected or impaired thereby, and
a Holder shall have no claim therefor against any party hereto.
 
 Section 10.14. Action of Holders when Securities are Denominated in Different
                  Currencies.
 
 Whenever any action is to be taken hereunder by the Holders of two or more
Series of Securities denominated in different currencies, then, for the pur-
poses of determining the principal amount of Securities held by such Holders,
the aggregate principal amount of the Securities denominated in a currency
other than United States dollars shall be deemed to be that amount of United
States dollars that could be obtained for such principal amount on the basis
of the spot rate of exchange for such currency as determined by the Company or
by an authorized exchange rate agent and evidenced to the Trustee by an Offi-
cers' Certificate as of the date the taking of such action by the Holders of
the requisite percentage in principal amount of the Securities is evidenced to
the Trustee. An exchange rate agent may be authorized in advance or from time
to time by the Company, and may be the Trustee or its Affiliate. Any such de-
termination by the Company or by any such exchange rate agent shall be conclu-
sive and binding on all Holders and the Trustee, and neither the Company nor
such exchange rate agent shall be liable therefor in the absence of bad faith.
<PAGE>
 
 
                                      53
 
 Section 10.15. Monies of Different Currencies to be Segregated.
 
 The Trustee shall segregate monies, funds, and accounts held by the Trustee
hereunder in one currency from any monies, funds or accounts in any other cur-
rencies, notwithstanding any provision herein which would otherwise permit the
Trustee to commingle such amounts.
 
 Section 10.16. Payment to be in Proper Currency.
 
 Each reference in any Security, or in the Authorizing Resolution and/or sup-
plemental indenture, if any, relating thereto, to any currency shall be of the
essence. In the case of any Security denominated in any currency (the "Re-
quired Currency") other than United States dollars, except as otherwise pro-
vided therein or in the related Authorizing Resolution and/or supplemental in-
denture, if any, the obligation of the Company to make any payment of princi-
pal of or interest thereon shall not be discharged or satisfied by any tender
by the Company, or recovery by the Trustee, in any currency other than the Re-
quired Currency, except to the extent that such tender or recovery shall re-
sult in the Trustee timely holding the full amount of the Required Currency.
The costs and risks of any such exchange, including without limitations, the
risks of delay and exchange rate fluctuation, shall be borne by the Company;
the Company shall remain fully liable for any shortfall or delinquency in the
full amount of Required Currency then due and payable, and in no circumstances
shall the Trustee be liable therefor. The Company hereby waives any defense of
payment based upon any such tender or recovery which is not in the Required
Currency, or which, when exchanged for the Required Currency by the Trustee,
is less than the full amount of Required Currency then due and payable.
<PAGE>
 
 
                                       54

                                   SIGNATURES
 
 In Witness Whereof, the parties hereto have caused this Indenture to be duly
executed, and their respective corporate seals to be hereunto affixed and at-
tested, all as of the date first written above.
 
                                   The Coastal Corporation
 
[SEAL]
 
 
                                   By: ________________________________________
Attest:_________________________
 
                                      _________________________________________
 
[SEAL]
 
 
                                   By: ________________________________________
Attest:_________________________
<PAGE>
 
                                                                      EXHIBIT A
 
                          [Form of Face of Security]
 
 [If the Holder of this Security (as indicated below) is The Depository Trust
Company ("DTC") or a nominee of DTC, this Security is a Global Security and
the following two legends apply:
 
 UNLESS THIS SECURITY IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DE-
POSITORY TRUST COMPANY ("DTC"), 55 WATER STREET, NEW YORK, NEW YORK TO THE IS-
SUER OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND SUCH
SECURITY ISSUED IS REGISTERED IN THE NAME OF CEDE & CO., OR SUCH OTHER NAME AS
REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC, ANY TRANSFER, PLEDGE OR
OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL, SINCE
THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.
 
 UNLESS IT IS EXCHANGED IN WHOLE OR IN PART FOR SECURITIES IN DEFINITIVE REG-
ISTERED FORM, THIS SECURITY MAY NOT BE TRANSFERRED EXCEPT AS A WHOLE BY DTC TO
A NOMINEE OF DTC OR BY A NOMINEE OF DTC TO DTC OR ANOTHER NOMINEE OF DTC OR BY
DTC OR ANY SUCH NOMINEE TO A SUCCESSOR OF DTC OR A NOMINEE OF SUCH SUCCESSOR.]
 
 [The following is to be included if the Security is an Original Issue Dis-
count Security:]
 
 [FOR PURPOSES OF SECTION 1273 AND 1275 OF THE UNITED STATES INTERNAL REVENUE
CODE OF 1986, AS AMENDED: (I) THE ISSUE DATE OF THIS SECURITY IS             ;
(II) THE YIELD TO MATURITY IS     %; (III) THE ORIGINAL ISSUE DISCOUNT PER
$       FACE AMOUNT AT WHICH THE SECURITY IS ISSUED IS $     ; AND (IV) THE
[EXACT] [APPROXIMATE] METHOD HAS BEEN USED TO DETERMINE YIELD FOR THE ACCRUAL
PERIOD BEGINNING              AND ENDING              AND THE AMOUNT OF THE
ORIGINAL ISSUE DISCOUNT PER $       FACE AMOUNT ALLOCABLE TO THE ACCRUAL PE-
RIOD BEGINNING              AND ENDING              IS $      ].
<PAGE>
 
 
                                      A-2
 
                            The Coastal Corporation
                              [title of Security]
 
<TABLE>
<CAPTION>
RATE OF INTEREST               MATURITY DATE                           ORIGINAL ISSUE DATE
- ----------------               -------------                           -------------------
<S>                            <C>                                     <C>
 
No.                                                                          $
</TABLE>
 
 The Coastal Corporation, a corporation duly organized and existing under the
laws of the State of Delaware (herein called the "Company"), for value re-
ceived, hereby promises to pay to      or registered assigns, the principal
sum of     on the Maturity Date shown above, and to pay interest thereon, at
the annual rate of interest shown above, from the Original Issue Date shown
above or from the most recent Interest Payment Date (as hereinafter defined)
to which interest has been paid or duly provided for, payable semi-annually on
      and       of each year and at maturity (an "Interest Payment Date"),
commencing on the first such date after the Original Issue Date, except that
if the Original Issue Date is on or after a Regular Record Date but before the
next Interest Payment Date, interest payments will commence on the second In-
terest Payment Date following the Original Issue Date.
 
 [reference to currency[ies] of payment and currency exchange arrangements, if
applicable.]
 
 The interest so payable, and punctually paid or duly provided for, on any In-
terest Payment Date will, as provided in the Indenture, be paid to the person
in whose name this [name of Security] is registered at the close of business
on the Regular Record Date for any such Interest Payment Date, which shall be
the fifteenth calendar day (whether or not a Business Day) preceding the ap-
plicable Interest Payment Date. Any such interest not so punctually paid or
duly provided for, and any interest payable on such defaulted interest (to the
extent lawful), will forthwith cease to be payable to the Holder on such Regu-
lar Record Date and shall be paid to the person in whose name this [name of
Security] is registered at the close of business on a special record date for
the payment of such defaulted interest to be fixed by the Company, notice of
which shall be given to Holders of [name of Series] not less than 15 days
prior to such special record date. Payment
<PAGE>
 
 
                                      A-3
of the principal of and interest on this [name of Security] will be made at
the agency of the Company maintained for that purpose in [New York, New York
or other place of payment] and at any other office or agency maintained by the
Company for such purpose, in [reference to United States dollars or other cur-
rency of payment]; provided, however, that at the option of the Company pay-
ment of interest, other than interest due on the Maturity Date, may be made by
check mailed to the address of the person entitled thereto as such address
shall appear in the Security Register. [Include the following, if applicable:]
Payments on the Maturity Date will be made in immediately available funds
against presentment of this [name of Security].
 
 Reference is hereby made to the further provisions of this [name of Security]
set forth on the reverse hereof, which further provisions shall for all pur-
poses have the same effect as if set forth at this place.
 
 Unless the certificate of authentication hereon has been executed by the
Trustee referred to on the reverse hereof by manual signature, this [name of
Security] shall not be entitled to any benefit under the Indenture or be valid
or obligatory for any purpose.
 
 In Witness Whereof, The Coastal Corporation has caused this instrument to be
executed in its corporate name by the facsimile signature of its duly autho-
rized officers and has caused a facsimile of its corporate seal to be affixed
hereunto or imprinted hereon.
 
                                   The Coastal Corporation
 
 
Attest: ________________________   By: ________________________________________
        [Assistant] Secretary                    [Title of Officer]
<PAGE>
 
 
                                      A-4
DATED:
 
                    Trustee's Certificate of Authentication
 
 This is one of the [name of Series] referred to in the within-mentioned In-
denture.
 
 
 
                                   By: ________________________________________
                                                Authorized Signatory
 
                                [Reverse Side]
 
                            The Coastal Corporation
                              [Name of Security]
 
 This [name of Security] is one of a duly authorized issue of [name of Securi-
ties] of the Company (which term includes any successor corporation under the
Indenture hereinafter referred to) designated as its [title of Series] (the
"[name of Series]"),        issued or to be issued pursuant to an Indenture,
dated as of        , 199  (the "Indenture"), between the Company and Harris
Trust and Savings Bank, as Trustee (the "Trustee," which term includes any
successor trustee under the Indenture); and under [reference to Authorizing
Resolution and/or supplemental indenture (if any) relating to the Series]. The
terms of this [name of Security] include those stated in the Indenture and
[reference to Authorizing Resolution and/or supplemental indenture (if any)
relating to the Series] and those made part of the Indenture by reference to
the Trust Indenture Act of 1939, as in effect on the date of the Indenture.
Reference is hereby made to the Indenture and all [further] supplemental in-
dentures thereto for a statement of the respective rights, limitation of
rights, duties and immunities thereunder of the Company, the Trustee and the
Holders and of the terms upon which the [name of Security] are, and are to be,
authenticated and delivered.
 
 This [name of Series] is a Series of Securities issued or to be issued by the
Company under the Indenture, and this Series is limited in aggregate principal
amount to $   . The Indenture provides that the Securities of the Com-
<PAGE>
 
 
                                      A-5
pany referred to therein ("Securities"), including the [name of Series], may
be issued in one or more Series, which different Series may be issued in such
aggregate principal amounts and on such terms (including, but not limited to,
terms relating to interest rate or rates, provisions for determining such in-
terest rate or rates and adjustments thereto, maturity, redemption (optional
and mandatory), sinking fund, covenants and Events of Default) as may be pro-
vided in or pursuant to the Authorizing Resolutions and/or supplemental inden-
ture (if any) relating to the several Series.
 
 [The following to be included if the Securities are not redeemable prior to
maturity.]
 
 This [name of Security] may not be redeemed prior to its Maturity Date.
 
 [The following paragraph, or other appropriate redemption provisions, to be
included if the Securities are Redeemable Securities:]
 
 The [name of Series] are subject to redemption upon not less than 30 nor more
than 60 days' notice by mail, [the following clause to be included if there is
a Sinking Fund:] [ (1) on [annual Sinking Fund Redemption Date] in each year
commencing with the year [year of first Sinking Fund payment] through opera-
tion of the Sinking Fund at a Redemption Price equal to their principal amount
and (2)] [at any time or from time to time] in whole or in part, at the elec-
tion of the Company at a Redemption Price equal to the percentage set forth
below of the principal amount to be redeemed for the respective twelve-month
periods beginning [          ] of the years indicated:
 
                        [Schedule of Redemption Prices]
 
 
and thereafter at 100% of the principal amount thereof, together in each case
with accrued interest to the Redemption Date.
<PAGE>
 
 
                                      A-6
 
 [The following paragraph, or other appropriate Sinking Fund provision, to be
included if there is a Sinking Fund for the Series:]
 
 The Sinking Fund provides for the redemption on [first Sinking Fund Redemp-
tion Date] and on [annual Sinking Fund Redemption Date] in each year thereaf-
ter through [year of final Sinking Fund date] of not less than [minimum re-
quired Sinking Fund redemption amount] principal amount nor more than [maximum
permitted Sinking Fund redemption amount] principal amount of [name of Se-
ries]. [name of Series] purchased, acquired or redeemed by the Company other-
wise than by redemption through the Sinking Fund may be credited against Sink-
ing Fund requirements to the extent not previously so credited.
 
 [The following paragraph to be included if the Securities are Redeemable Se-
curities or Sinking Fund Securities:]
 
 If an event of redemption of this [name of Security] in part only, a new
[name of Security] or [name of Series] for the unredeemed portion hereof shall
be issued in the name of the Holder hereof upon the surrender hereof.
 
 [The following paragraph to be included if the Securities are not Original
Issue Discount Securities:]
 
 If an Event of Default, as defined in the Indenture and in the Authorizing
Resolution and/or supplemental indenture (if any) relating to the [name of Se-
ries] (if there shall be any additional Events of Default specified in respect
of the [name of Series]), shall occur and be continuing, the principal of all
the [name of Series] may be declared due and payable in the manner and with
the effect provided in the Indenture.
 
 [If the Securities are Original Issue Discount Securities, insert schedule as
to amounts which are payable on acceleration under Section 6.02 and provable
in bankruptcy under Section 6.09 from time to time.]
 
 The Indenture permits, with certain exceptions as therein provided, the
amendment thereof and the modification of the rights and obligations of the
Company and the rights of the Holders of the [name of Series] under the Inden-
ture at any time by the Company and the Trustee with the consent of the Hold-
ers of a majority in aggregate principal amount of the Securities affected
thereby, voting as a single class (which may include the [name of Series]), at
the time outstanding. The Indenture also contains provisions permitting the
Holders of specified percentages in aggregate principal amount of the Securi-
ties at the time outstand-
<PAGE>
 
 
                                      A-7
ing to waive compliance by the Company with certain provisions of the Inden-
ture and certain past defaults under the Indenture and their consequences. Any
such consent or waiver by the Holder of this [name of Security] shall be con-
clusive and binding upon such Holder and upon all future Holders of this [name
of Security] and of any [name of Security] issued upon the registration of
transfer hereof or in exchange herefor in lieu hereof, whether or not notation
of such consent or waiver is made upon this [name of Security].
 
 The Indenture provides that no Holder may pursue any remedy under the Inden-
ture unless the Trustee shall have failed to act after notice of an Event of
Default and written request by Holders of at least 25% in principal amount of
the [name of Securities] of the applicable Series and the offer to the Trustee
of indemnity satisfactory to it; however, such provision does not affect the
right to sue for enforcement of any overdue payment on any Security.
 
 No reference herein to the Indenture and no provision of this [name of Secu-
rity] or of the Indenture shall alter or impair the obligation of the Company,
which is absolute and unconditional, to pay the principal of and interest on
this [name of Security] at the times, places and rates, and in the coin or
currency, herein prescribed.
 
 As provided in the Indenture and subject to certain limitations therein set
forth, the transfer of this [name of Security] is registrable in the Security
Register upon surrender of this [name of Security] for registration of trans-
fer at the agency of the Company provided for that purpose duly endorsed by,
or accompanied by a written instrument of transfer in substantially the form
accompanying this [name of Security] duly executed by, the Holder hereof or
his attorney duly authorized in writing, and thereupon one or more new [name
of Series], of authorized denominations and for the same aggregate principal
amount, will be issued to the designated transferee or transferees.
 
 The [name of Series] are issuable only in registered form without coupons in
denominations of [currency and minimum denomination] and any integral multiple
thereof. As provided in the Indenture and subject to certain limitations
therein set forth, the [name of Series] are exchangeable for a like aggregate
principal amount of [name of Series] of a different authorized denomination,
as requested by the Holder surrendering the same.
 
 No service charge shall be made for any such registration of transfer or ex-
change, but the Company may require payment of a sum sufficient to cover
<PAGE>
 
 
                                      A-8
any transfer tax or similar governmental charge payable in connection there-
with (other than any such transfer taxes or similar governmental charge pay-
able upon exchanges pursuant to Section 2.11, 3A.08 or 9.05 in which case such
transfer taxes or similar governmental charges shall be paid by the Company).
 
 Prior to due presentment of this [name of Security] for registration of
transfer, the Company, the Trustee and any agent of the Company or the Trustee
may treat the person in whose name this [name of Security] is registered as
the owner hereof for all purposes, whether or not this [name of Security] be
overdue, and neither the Company, the Trustee nor any such agent shall be af-
fected by notice to the contrary.
 
 [Reference to Foreign Currencies]
 
 All terms used in this [name of Security] which are defined in the Indenture
shall have the meanings assigned to them in the Indenture.
 
 Customary abbreviations may be used in the name of a [name of Security]
holder or any assignee, such as: TEN COM ( = tenants in common), TEN ENT
( = tenants by the entireties), JT TEN ( = joint tenants with right of survi-
vorship and not as tenants in common), CUST ( = Custodian) and U/G/M/A
( = Uniform Gifts to Minors Act).
 
 The Company will furnish to any [name of Security] holder of record, upon
written request, without charge, a copy of the Indenture. Requests may be made
to: The Coastal Corporation, Coastal Tower, Nine Greenway Plaza, Houston,
Texas 77046-0995, Attention: Corporate Secretary.
<PAGE>
 
 
                                      A-9
                                ASSIGNMENT FORM
 
 If you the holder want to assign this [name of Security], fill in the form
below and have your signature guaranteed:
 
I or we assign and transfer this [name of Security] to:

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

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

- -------------------------------------------------------------------------------
                 (PRINT OR TYPE NAME, ADDRESS AND ZIP CODE AND
                SOCIAL SECURITY OR TAX ID NUMBER OF ASSIGNEES)
 
and irrevocably appoint, _________________________agent to transfer this [name
of Security] on the books of the Company. The agent may substitute another to
act for him.

Dated: _________________________     Signed: __________________________________

                                     __________________________________________
                                        (SIGN EXACTLY AS NAME APPEARS ON THE
                                      OTHER SIDE OF THIS [NAME OF SECURITY] )
 
SIGNATURE GUARANTEE: __________________________________________________________
 
 Notice: Signature(s) must be guaranteed by a member firm of the New York
Stock Exchange or a commercial bank or trust company.

<PAGE>
 
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------

                                                                     EXHIBIT 4.3
                            THE COASTAL CORPORATION
                                      AND
[LOGO APPEARS      HARRIS TRUST AND SAVINGS BANK, AS TRUSTEE
HERE]                         -------------------
                            SUBORDINATED INDENTURE
                            DATED AS OF       , 199
                              -------------------
                         SUBORDINATED DEBT SECURITIES
 
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
<PAGE>
 
                             CROSS-REFERENCE TABLE
 
<TABLE>
<CAPTION>
                                                                   INDENTURE
 TIA SECTION                                                        SECTION
 -----------                                                       ---------
 <C>         <S>                                               <C>
 Section 310 (a)(1)..........................................  7.10
             (a)(2)..........................................  7.10
             (a)(3)..........................................  N.A.
             (a)(4)..........................................  N.A.
             (a)(5)..........................................  7.08
             (b).............................................  7.08; 7.10; 10.02
             (c).............................................  N.A.
 Section 311 (a).............................................  7.11
             (b).............................................  7.11
             (c).............................................  N.A.
 Section 312 (a).............................................  2.06
             (b).............................................  10.03
             (c).............................................  10.03
 Section 313 (a).............................................  7.06
             (b)(1)..........................................  N.A.
             (b)(2)..........................................  7.06
             (c).............................................  7.06; 10.02
             (d).............................................  7.06
 Section 314 (a).............................................  4.05; 10.02
             (b).............................................  N.A.
             (c)(1)..........................................  10.04
             (c)(2)..........................................  10.04
             (c)(3)..........................................  N.A.
             (d).............................................  N.A.
             (e).............................................  10.05
             (f).............................................  N.A.
 Section 315 (a).............................................  7.01(b)
             (b).............................................  7.05; 10.02
             (c).............................................  7.01(a)
             (d).............................................  7.01(c)
             (e).............................................  6.11
 Section 316 (a)(last sentence)..............................  2.10
             (a)(1)(A).......................................  6.05
             (a)(1)(B).......................................  6.04
             (a)(2)..........................................  N.A.
             (b).............................................  6.07
             (c).............................................  9.04
 Section 317 (a)(1)..........................................  6.08
             (a)(2)..........................................  6.09
             (b).............................................  2.05
 Section 318 (a).............................................  10.01
</TABLE>
- ---------
N.A. means Not Applicable.
NOTE:  This Cross-Reference Table shall not, for any purpose, be deemed to be
       a part of this Indenture.
<PAGE>

                                      i
 
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                                                            PAGE
                                                                            ----
 <C>             <S>                                                        <C>
 Recitals of the Company...................................................   1
 
                                   ARTICLE 1
 
                   Definitions and Incorporation by Reference
 
 Section   1.01. Definitions..............................................    1
 Section   1.02. Incorporation by Reference of Trust Indenture Act........    7
 Section   1.03. Rules of Construction....................................    8
 
                                   ARTICLE 2
 
                                 The Securities
 
 Section   2.01. Form of Securities.......................................    8
 Section   2.02. Title and Terms..........................................    9
 Section   2.03. Execution and Authentication.............................   12
 Section   2.04. Registrar, Paying Agent and Conversion Agent.............   14
 Section   2.05. Paying Agent to Hold Money in Trust......................   15
 Section   2.06. Securityholder Lists.....................................   15
 Section   2.07. Transfer and Exchange....................................   16
 Section   2.08. Replacement Securities...................................   18
 Section   2.09. Outstanding Securities...................................   18
 Section   2.10. Treasury Securities......................................   19
 Section   2.11. Temporary Securities.....................................   19
 Section   2.12. Cancellation.............................................   20
 Section   2.13. Defaulted Interest.......................................   20
 Section   2.14. Persons Deemed Owners....................................   20
 
                                   ARTICLE 3A
 
                                   Redemption
 
 Section 3A.01.  Right of Redemption......................................   21
 Section 3A.02.  Applicability of Article.................................   21
 Section 3A.03.  Election to Redeem; Notice to Trustee....................   21
 Section 3A.04.  Selection by Trustee of Securities to be Redeemed........   21
 Section 3A.05.  Notice of Redemption.....................................   22
 Section 3A.06.  Deposit of Redemption Price..............................   23
 Section 3A.07.  Securities Payable on Redemption Date....................   23
 Section 3A.08.  Securities Redeemed in Part..............................   24
</TABLE>
 

<PAGE>
 
 
                                       ii
 
                                   ARTICLE 3B
 
                                  Sinking Fund
 
<TABLE>
<CAPTION>
                                                                            PAGE
                                                                            ----
 <C>             <S>                                                        <C>
 Section 3B.01.  Sinking Fund Payments....................................   24
 Section 3B.02.  Satisfaction of Sinking Fund Payments with Securities....   25
 Section 3B.03.  Redemption of Securities for Sinking Fund................   25
 
                                   ARTICLE 4
 
                                   Covenants
 
 Section   4.01. Payment of Securities....................................   26
 Section   4.02. Maintenance of Office or Agency..........................   26
 Section   4.03. Corporate Existence......................................   27
 Section   4.04. Compliance Certificate...................................   27
 Section   4.05. SEC Reports..............................................   28
 Section   4.06. Waiver of Stay, Extension or Usury Laws..................   28
 
                                   ARTICLE 5
 
                             Successor Corporation
 
 Section   5.01. When Company May Merge, etc. ............................   28
 Section   5.02. Successor Corporation Substituted........................   29
 
                                   ARTICLE 6
 
                              Default and Remedies
 
 Section   6.01. Events of Default........................................   29
 Section   6.02. Acceleration.............................................   31
 Section   6.03. Other Remedies...........................................   32
 Section   6.04. Waiver of Past Defaults..................................   32
 Section   6.05. Control by Majority......................................   32
 Section   6.06. Limitation on Suits......................................   33
 Section   6.07. Rights of Holders to Receive Payment.....................   33
 Section   6.08. Collection Suit by Trustee...............................   34
 Section   6.09. Trustee May File Proofs of Claim.........................   34
 Section   6.10. Priorities...............................................   35
 Section   6.11. Undertaking for Costs....................................   35
</TABLE>
<PAGE>
 
 
                                      iii
 
                                   ARTICLE 7
 
                                    Trustee
 
<TABLE>
<CAPTION>
                                                                            PAGE
                                                                            ----
 <C>             <S>                                                        <C>
 Section   7.01. Duties of Trustee........................................   35
 Section   7.02. Rights of Trustee........................................   37
 Section   7.03. Individual Rights of Trustee.............................   37
 Section   7.04. Trustee's Disclaimer.....................................   37
 Section   7.05. Notice of Defaults.......................................   38
 Section   7.06. Reports by Trustee to Holders............................   38
 Section   7.07. Compensation and Indemnity...............................   38
 Section   7.08. Replacement of Trustee...................................   39
 Section   7.09. Successor Trustee by Merger, etc.........................   40
 Section   7.10. Eligibility; Disqualification............................   40
 Section   7.11. Preferential Collection of Claims Against Company........   41
 
                                   ARTICLE 8
 
                             Discharge of Indenture
 
 Section   8.01. Termination of Company's Obligations.....................   41
 Section   8.02. Application of Trust Money...............................   42
 Section   8.03. Repayment to Company.....................................   43
 Section   8.04. Reinstatement............................................   43
 Section   8.05. Indemnity for U.S. Government Obligations................   43
 
                                   ARTICLE 9
 
                      Amendments, Supplements and Waivers
 
 Section   9.01. Without Consent of Holders...............................   44
 Section   9.02. With Consent of Holders..................................   44
 Section   9.03. Compliance With Trust Indenture Act......................   46
 Section   9.04. Revocation and Effect of Consents........................   46
 Section   9.05. Notation on or Exchange of Securities....................   47
 Section   9.06. Trustee to Sign Amendments, etc..........................   47
 Section   9.07. Subordination Unimpared..................................   47
</TABLE>
<PAGE>
 
 
                                       iv
 
                                   ARTICLE 10
 
                                 Miscellaneous
 
<TABLE>
<CAPTION>
                                                                            PAGE
                                                                            ----
 <C>              <S>                                                       <C>
 Section  10.01.  Trust Indenture Act Controls...........................    47
 Section  10.02.  Notices................................................    47
 Section  10.03.  Communications by Holders With Other Holders...........    48
 Section  10.04.  Certificate and Opinion as to Conditions Precedent.....    48
 Section  10.05.  Statements Required in Certificate or Opinion..........    48
 Section  10.06.  Rules by Trustee, Paying Agent, Registrar..............    49
 Section  10.07.  Legal Holidays.........................................    49
 Section  10.08.  Governing Law..........................................    49
 Section  10.09.  No Adverse Interpretation of Other Agreements..........    49
 Section  10.10.  No Recourse Against Others.............................    49
 Section  10.11.  Successors.............................................    50
 Section  10.12.  Duplicate Originals....................................    50
 Section  10.13.  Separability...........................................    50
 Section  10.14.  Action of Holders When Securities are Denominated in
                    Different Currencies.................................    50
 Section  10.15.  Monies of Different Currencies to be Segregated........    50
 Section  10.16.  Payment to be in Proper Currency.......................    51
 
                                   ARTICLE 11
 
                            Conversion of Securities
 
 Section   11.01. Applicability of Article...............................    51
 Section   11.02. Exercise of Conversion Privilege.......................    51
 Section   11.03  Fractional Interests...................................    53
 Section   11.04. Adjustment of Conversion Price.........................    54
 Section   11.05. Continuation of Conversion Privilege in Case of Merger,
                    Consolidation or Sale of Assets......................    57
 Section   11.06. Notice of Certain Events...............................    58
 Section   11.07. Taxes on Conversion....................................    59
 Section   11.08. Company to Provide Stock...............................    59
 Section   11.09. Disclaimer of Responsibility for Certain Matters.......    60
 Section   11.10. Return of Funds Deposited for Redemption of Converted
                    Securities...........................................    61
</TABLE>
<PAGE>
 
 
                                       v
 
                                   ARTICLE 12
 
                                 Subordination
 
<TABLE>
<CAPTION>
                                                                           PAGE
                                                                           ----
 <C>              <S>                                                      <C>
 Section   12.01. Securities Subordinated to Senior Indebtedness.........   61
 Section   12.02. Reliance on Certificate of Liquidating Agent; Further
                   Evidence as to Ownership of Senior Indebtedness.......   64
 Section   12.03. Payment Permitted If No Default........................   65
 Section   12.04. Disputes with Holders of Certain Senior Indebtedness...   65
 Section   12.05. Trustee Not Charged with Knowledge of Prohibition......   65
 Section   12.06. Trustee to Effectuate Subordination....................   66
 Section   12.07. Rights of Trustee as Holder of Senior Indebtedness.....   66
 Section   12.08. Article Applicable to Paying Agents....................   66
 Section   12.09. Subordination Rights Not Impaired by Acts or Omissions
                   of the Company or Holders of Senior Indebtedness......   67
 Section   12.10. Trustee Not Fiduciary for Holders of Senior 
                   Indebtedness...........................................  67
  Testimonium.............................................................
  Signatures..............................................................  68
  Exhibit A--Form of Security............................................. A-1
</TABLE>
- ---------
NOTE:  This Table of Contents shall not, for any purpose, be deemed to be a
       part of this Indenture.
<PAGE>
 
 SUBORDINATED INDENTURE, dated as of                 , 199 , between The
Coastal Corporation, a Delaware corporation (the "Company"), and Harris Trust
and Savings Bank, as Trustee (the "Trustee").
 
                            RECITALS OF THE COMPANY
 
 The Company has duly authorized the execution and delivery of this Indenture
to provide for the issuance from time to time of its unsecured subordinated
notes, debentures or other evidences of indebtedness (collectively, the "Secu-
rities"), to be issued from time to time in one or more series (a "Series") as
provided in this Indenture and as shall be provided, in respect of any Series,
in or pursuant to the Authorizing Resolution hereinafter referred to and/or in
the indenture supplemental hereto (if any) relating to such Series.
 
                                   ARTICLE 1
 
                  Definitions and Incorporation by Reference
 
 Section 1.01. Definitions.
 
 "Affiliate" of any specified person means any other person directly or indi-
rectly controlling or controlled by or under direct or indirect common control
with such specified person. For the purposes of this definition, "control"
when used with respect to any person means the power to direct the management
and policies of such person, directly or indirectly, whether through the own-
ership of voting securities, by contract or otherwise; and the terms "control-
ling" and "controlled" have meanings correlative to the foregoing.
 
 "Agent" means any Registrar, Paying Agent, co-Registrar or Conversion Agent.
 
 "Authorizing Resolution" means a Board Resolution providing for the issuance
of a Series of Securities.
 
 "Bankruptcy Law" shall have the meaning provided in Section 6.01.
 
 "Blockage Period" shall have the meaning provided in Section 12.01.
 
 "Board of Directors" means the Board of Directors of the Company or any duly
authorized committee of the Board.
 
<PAGE>
 
 
                                       2
 "Board Resolution" means a copy of a resolution certified by the Secretary or
an Assistant Secretary of the Company to have been duly adopted by the Board
of Directors and to be in full force and effect on the date of such certifica-
tion, and delivered to the Trustee (except as provided in Section 2.03).
 
 "Business Day" means a day that is not a Legal Holiday.
 
 "Capital Stock" means, with respect to any person, any and all shares, inter-
ests, participations or other equivalents (however designated) of corporate
stock of such person other than Mandatory Redemption Preferred Stock.
 
 "Capitalized Lease Obligation" means Indebtedness represented by obligations
under a lease that is required to be capitalized for financial reporting pur-
poses in accordance with generally accepted accounting principles.
 
 "Common Stock" means the common stock, par value $.33 1/3 per share, of the
Company, as the same exists at the date of execution and delivery of this In-
denture, or other Capital Stock of the Company into which such common stock is
reclassified or changed from time to time.
 
 "Company" means the party named as such in this Indenture until a successor
replaces it pursuant to this Indenture and thereafter means the successor.
 
 "Company Request" and "Company Order" mean, respectively, a written request
or order signed in the name of the Company by two Officers of the Company or
by an Officer and the Treasurer, an Assistant Treasurer, the Secretary or an
Assistant Secretary, and delivered to the Trustee in respect of the Series to
which the Company Request or Company Order shall relate.
 
 "Consolidated Subsidiary" means a Subsidiary which for financial reporting
purposes is accounted for by the Company as a consolidated subsidiary.
 
 "Conversion Agent" shall have the meaning provided in Section 2.04.
 
 "Conversion Price" shall have the meaning provided in Section 11.04.
 
 "Corporate Trust Office" or other similar term means the principal office of
the Trustee at which at any particular time its corporate trust business shall
be administered, which office at the date hereof is located at        ,
       ; the Trustee will notify the Company of any change thereof.
<PAGE>
 
 
                                       3
 
 "Custodian" shall have the meaning provided in Section 6.01.
 
 "Date of Conversion" shall have the meaning provided in Section 11.02.
 
 "Default" means any event which is, or after notice or passage of time or
both would become, an Event of Default.
 
 "Default Notice" shall have the meaning provided in Section 12.01.
 
 "Depository" means, with respect to the Securities of any Series issuable or
issued in the form of one or more Global Securities, the Person designated as
Depository by the Company pursuant to Section 2.02, initially The Depository
Trust Company, until a successor Depository shall have become such pursuant to
the applicable provisions of this Indenture, and thereafter "Depository" shall
mean or include each person who is then a Depository hereunder, and, if at any
time there is more than one such person, "Depository" as used with respect to
the Securities of any such Series shall mean the Depository with respect to
the Global Securities of such Series.
 
 "Event of Default" shall have the meaning provided in Section 6.01.
 
 "Extendible Securities" means Securities of any Series issued hereunder the
final maturity of which is extendible for a stated period of time, as shall be
provided in, or pursuant to, the Authorizing Resolution and/or supplemental
indenture (if any) relating to such Series.
 
 "Global Security" means a Security evidencing all or a part of a Series of
Securities issued to and registered in the name of the Depository for such Se-
ries, or its nominee, in accordance with Section 2.02, and bearing the legend
prescribed in Section 2.03.
 
 "Holder" or "Securityholder" means, with respect to any Security, the person
in whose name such Security is registered on the Security Register.
 
 "Indebtedness" means (i) any liability of any person (a) for borrowed money,
(b) evidenced by a note, debenture or similar instrument (including a purchase
money obligation) given in connection with the acquisition of any property or
assets (other than inventory or similar property acquired in the ordinary
course of business), including securities, or (c) for the payment of money re-
lating to a Capitalized Lease Obligation; (ii) any guarantee by any person of
any liability of others described in the preceding clause (i); and (iii) any
amendment, renewal, extension or refunding of any liability of the types re-
ferred to in clauses (i) and (ii) above.
<PAGE>
 
 
                                       4
 
 "Indenture" means this Indenture as amended or supplemented from time to time
and shall include the forms and terms of particular Series of Securities es-
tablished as contemplated hereunder.
 
 "Interest Payment Date" means, for any Series of Securities issued and out-
standing hereunder, the date or dates in each year on which any interest on
such Series is paid or made available for payment.
 
 "Last Sale Price" shall have the meaning provided in Section 11.03.
 
 "Legal Holiday" shall have the meaning provided in Section 10.07.
 
 "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 pro-
vided, whether at the Stated Maturity or by declaration of acceleration, call
for redemption or otherwise.
 
 "Maturity Date" means the date specified in each Security on which the prin-
cipal thereof is due and payable in full.
 
 "Officer" means the Principal Executive Officer, Principal Financial Officer
or Principal Accounting Officer of the Company.
 
 "Officers' Certificate" means a certificate signed by two Officers or by an
Officer and the Treasurer or an Assistant Treasurer or the Secretary or an As-
sistant Secretary of the Company and delivered to the Trustee. See Sections
10.04 and 10.05.
 
 "Opinion of Counsel" means a written opinion from legal counsel who is ac-
ceptable to the Trustee. The counsel may be an employee of or counsel to the
Company. See Sections 10.04 and 10.05.
 
 "Original Issue Date" means the date on which a Security is issued to the
original purchaser thereof, as specified in such Security.
 
 "Original Issue Discount Securities" means Securities which provide for an
amount less than 100% of the principal amount thereof to be due and payable
upon a declaration of acceleration of the Maturity thereof pursuant to Section
6.02.
 
 "Paying Agent" shall have the meaning provided in Section 2.04, except that
for the purposes of Article 8 the Paying Agent shall not be the Company or any
Subsidiary.
<PAGE>
 
 
                                       5
 
 "person" means any individual, corporation, partnership, joint venture, asso-
ciation, joint-stock company, trust, unincorporated organization or government
or other agency or political subdivision thereof.
 
 "principal" of a debt security means the principal of the security plus, when
appropriate, the premium, if any, on the security.
 
 "Redeemable Securities" means Securities of any Series which may be redeemed,
at the option of the Company, prior to the Stated Maturity thereof, on the
terms specified in or pursuant to the Authorizing Resolution and/or supplemen-
tal indenture relating to such Series and in accordance with Article 3A here-
in.
 
 "Redemption Date" when used with respect to any Security of any Series to be
redeemed means the date fixed for such redemption by or pursuant to the provi-
sions of such Security, this Indenture and the Authorizing Resolution and/or
supplemental indenture relating to such Security.
 
 "Redemption Price" when used with respect to any Security of any Series to be
redeemed means the price at which it is to be redeemed pursuant to the provi-
sions of such Security, this Indenture and the Authorizing Resolution and/or
supplemental indenture relating to such Security.
 
 "Registrar" shall have the meaning provided in Section 2.04.
 
 "Regular Record Date" means, for the interest payable on any Interest Payment
Date in respect of any Series of Securities, except as provided in, or pursu-
ant to, the Authorizing Resolution and/or supplemental indenture (if any) re-
lating thereto, the day (whether or not a Business Day) that is fifteen days
preceding the applicable Interest Payment Date.
 
 "Representative" shall have the meaning provided in Section 12.01.
 
 "Required Currency" shall have the meaning provided in Section 10.16.
 
 "SEC" means the Securities and Exchange Commission.
 
 "Securities" means the Securities, as amended or supplemented from time to
time pursuant to the terms of this Indenture, of the Company of any Series
that are issued under this Indenture.
 
 "Security Register" shall have the meaning provided in Section 2.04.
<PAGE>
 
 
                                       6
 
 "Senior Indebtedness" means Indebtedness of the Company, whether outstanding
on the date of issue of any Securities or thereafter created, incurred, as-
sumed or guaranteed by the Company, other than the following: (i) any Indebt-
edness as to which, by the terms of the instrument creating or evidencing such
Indebtedness, it is expressly provided that such Indebtedness is subordinated
in right of payment to all Indebtedness of the Company not expressly subordi-
nated to such Indebtedness, (ii) any Indebtedness which, by its terms, ex-
pressly refers to the Securities and states that such Indebtedness shall not
be senior, shall be pari passu or shall be subordinated in right of payment to
the Securities, (iii) Securities of the same or another Series and (iv) In-
debtedness of or amounts owed by the Company for compensation to employees, or
for goods, materials and services purchased in the ordinary course of busi-
ness.
 
 "Series" means, with respect to Securities issued hereunder, the Securities
issued pursuant to any particular Authorizing Resolution and/or supplemental
indenture (if any), subject to the right of the Board of Directors to specify
in such Authorizing Resolution and/or supplemental indenture (if any) that
such Securities shall constitute more than one Series.
 
 "Sinking Fund" means, with respect to any Sinking Fund Securities, a sinking
fund provided for in Article 3B.
 
 "Sinking Fund Securities" means Securities of any Series which are required
to be redeemed from time to time prior to the Stated Maturity thereof in whole
or in part under a Sinking Fund, on the terms specified in the Authorizing
Resolution and/or supplemental indenture (if any) relating to such Series and
in accordance with Article 3B herein.
 
 "Special Record Date" shall have the meaning provided in Section 2.13.
 
 "Stated Maturity" when used with respect to any Security or any installment
of interest thereon means the date specified in such Security as the fixed
date on which the principal of such Security or such installment of interest
is due and payable.
 
 "Subsidiary" means (i) a corporation a majority of whose Capital Stock with
voting power, under ordinary circumstances, to elect directors is at the time,
directly or indirectly, owned by the Company, by the Company and a Subsidiary
(or Subsidiaries) of the Company or by a Subsidiary (or Subsidiaries) of the
Company or (ii) any other person (other than a corporation) in which the Com-
pany, a Subsidiary (or Subsidiaries) of the Company or the Company and a
<PAGE>
 
 
                                       7
Subsidiary (or Subsidiaries) of the Company, directly or indirectly, at the
date of determination thereof has at least majority ownership interest; pro-
vided, that no corporation shall be deemed a Subsidiary until the Company, a
Subsidiary (or Subsidiaries) of the Company or the Company and a Subsidiary
(or Subsidiaries) of the Company acquires more than 50% of the outstanding
voting stock thereof and has elected a majority of its board of directors.
 
 "TIA" means the Trust Indenture Act of 1939 (15 U.S. Code (S)(S) 77aaa-
77bbbb) as in effect on the date of this Indenture except as provided in Sec-
tions 9.03 and 11.05.
 
 "Trading Day" shall have the meaning provided in Section 11.03.
 
 "Trustee" means the party named as such in this Indenture until a successor
replaces it in accordance with the provisions of this Indenture and thereafter
means and includes the person or each person who is then a Trustee hereunder,
and if at any time there is more than one such person, "Trustee" as used with
respect to the Securities of any Series shall mean the Trustee with respect to
Securities of that Series.
 
 "Trust Officer" means any officer or assistant officer of the Trustee as-
signed by the Trustee to administer its corporate trust matters.
 
 "U.S. Government Obligations" shall have the meaning provided in Section
8.01.
 
 "Yield to Maturity" means, with respect to any Series of Securities, the
yield to maturity thereof, calculated at the time of issuance thereof, or, if
applicable, at the most recent redetermination of interest thereon, and calcu-
lated in accordance with accepted financial practice.
 
 Section 1.02. Incorporation by Reference of Trust Indenture Act.
 
 Whenever this Indenture refers to a provision of the TIA, the provision is
incorporated by reference in and made a part of this Indenture. The following
TIA terms used in this Indenture have the following meanings:
 
   "Commission" means the SEC;
 
   "indenture securities" means the Securities;
 
   "indenture security holder" means a Securityholder;
 
   "indenture to be qualified" means this Indenture;
 
   "indenture trustee" or "institutional trustee" means the Trustee; and
<PAGE>
 
 
                                       8
 "obligor" on the indenture securities means the Company or any other obligor
on the Securities.
 
 All other TIA terms used in this Indenture that are defined by the TIA, de-
fined by TIA reference to another statute or defined by SEC rule and not oth-
erwise defined herein have the meanings assigned to them therein.
 
 Section 1.03. Rules of Construction.
 
 Unless the context otherwise requires:
 
   (1) a term has the meaning assigned to it;
 
   (2) an accounting term not otherwise defined has the meaning assigned to
  it in accordance with generally accepted accounting principles in effect
  in the United States, and any other reference in this Indenture to "gener-
  ally accepted accounting principles" refers to generally accepted account-
  ing principles in effect in the United States;
 
   (3) "or" is not exclusive;
 
   (4) words in the singular include the plural, and words in the plural in-
  clude the singular;
 
   (5) provisions apply to successive events and transactions;
 
   (6) "herein," "hereof," "hereunder" and other words of similar import re-
  fer to this Indenture as a whole and not to any particular Article, Sec-
  tion or other subdivision; and
 
   (7) "include," "included" and "including" as used herein shall be deemed
  in each case to be followed by the phrase "without limitation."
 
                                   ARTICLE 2
 
                                The Securities
 
 Section 2.01. Form of Securities.
 
 The Securities of each Series and the certificate of authentication thereon
shall be in substantially the forms set forth in Exhibit A or in such other
forms as shall be specified in, or pursuant to, the Authorizing Resolution
and/or in the indenture supplemental hereto (if any) relating to such Series,
with such appropriate insertions, omissions, substitutions and other varia-
tions as are required or permitted by this Indenture or the said Authorizing
Resolution and/or supplemental indenture (if any).
 
 The definitive Securities of each Series shall be printed, lithographed or
engraved or produced by any combination of these methods on steel engraved
<PAGE>
 
 
                                       9
borders or may be produced in any other manner permitted by the rules of any
securities exchange on which the Securities may be listed, or, if they shall
not be listed on any securities exchange, in any other manner consistent here-
with, all as shall be determined by the officers executing such Securities, as
evidenced by their execution of such Securities. The Securities may have nota-
tions, legends or endorsements required by law, stock exchange rule or usage.
The Company shall approve the form of the Securities and any notation, legend
or endorsement on them.
 
 The terms and provisions contained in the Securities, annexed hereto as Ex-
hibit A or such other forms as specified in the Authorizing Resolution and/or
supplemental indenture (if any) relating thereto, shall constitute, and are
hereby expressly made, a part of this Indenture.
 
 Section 2.02. Title and Terms.
 
 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. All Securities issued
hereunder shall be subordinate and junior in right of payment, to the extent
and in the manner set forth in Article 12, to all Senior Indebtedness of the
Company. The terms of each Series shall be as provided in an Authorizing Reso-
lution and/or supplemental indenture (if any) or shall be determined in the
manner specified therein. The terms to be specified in respect of each Series
in the Authorizing Resolution and/or supplemental indenture (if any), or by
such person and/or procedures as shall be provided therein, shall include the
following:
 
   (1) the title of the Securities of such Series, which shall distinguish
  such Series from all other Series;
 
   (2) Whether the Securities will be convertible into Common Stock and, if
  so, the terms and conditions upon which such conversion will be effected
  including the initial Conversion Price and any adjustments thereto in ad-
  dition to or different from those set forth in Section 11, the conversion
  period and other provisions in addition to or in lieu of those set forth
  herein;
 
   (3) any limit upon the aggregate principal amount of the Securities of
  such Series which may be authenticated and delivered under this Indenture
  (except for Securities of such Series authenticated and delivered upon
  registration of transfer of, or in exchange for, or in lieu of, other Se-
  curities pursuant to Section 2.07, 2.08, 2.11, 3A.08, 9.05 or 11.02);
 
   (4) the date or dates on which the principal of the Securities of such
  Series is payable, and, if the Series shall be Extendible Securities, the
  terms
<PAGE>
 
 
                                      10
  on which the Company or any other person shall have the option to extend
  the Maturity of such Securities and the rights, if any, of the Holders to
  require payment of the Securities;
 
   (5) the rate or rates at which the Securities of such Series shall bear
  interest, if any (whether floating or fixed), the provisions, if any, for
  determining such interest rate or rates and adjustments thereto, the date
  or dates from which such interest shall accrue, the provisions, if any,
  for determining such date or dates, the Interest Payment Dates therefor,
  the Regular Record Dates (if different from those provided in the form of
  Security herein set forth) for the determination of Holders of the Securi-
  ties of such Series to whom interest is payable and the basis upon which
  interest, if any, shall be calculated if other than that of a 360-day year
  of twelve 30-day months;
 
   (6) the place or places where the principal of and interest on Securities
  of such Series shall be payable (if other than as provided in Section
  4.02), where Securities of such Series may be surrendered for registration
  of transfer or exchange and where notices or demands to or upon the Com-
  pany in respect of Securities of such Series and this Indenture may be
  served;
 
   (7) the price or prices at which, the period or periods within which and
  the terms and conditions upon which the Securities of such Series may be
  redeemed, in whole or in part, at the option of the Company, pursuant to a
  Sinking Fund or otherwise;
 
   (8) the obligation, if any, of the Company to redeem, purchase or repay
  Securities of such Series, in whole or in part, pursuant to a Sinking Fund
  or otherwise or at the option of a Holder thereof, and the price or prices
  at which, the period or periods within which and the terms and conditions
  upon which such redemption, purchase or repayment shall be made;
 
   (9) any deletions from, modifications of or additions to the Events of
  Default provided for herein with respect to the Securities of such Series,
  and any additions to the covenants or obligations provided for herein of
  the Company to the Holders of the Securities of such Series;
 
   (10) if less than 100% of the principal amount of the Securities of such
  Series is payable on acceleration under Section 6.02 or in bankruptcy un-
  der Section 6.09 at any time, a schedule of or the manner of computing the
  amounts which are so payable from time to time;
 
   (11) the form of the Securities of such Series (which may be, but which
  need not be, consistent with the form set forth in Exhibit A attached
  hereto), including whether the Securities of such Series shall be issued
  in whole or in part in the form of one or more Global Securities and, in
  such case, the Depository with respect to such Global Security or Securi-
  ties and the
<PAGE>
 
 
                                      11
  circumstances under which any Global Security may be registered for trans-
  fer or exchange, or authenticated and delivered, in the name of a Person
  other than such Depository or its nominee, if other than as set forth in
  Section 2.07;
 
   (12) if other than United States dollars, the currency(ies) in which pay-
  ment of the principal of or interest, if any, on the Securities of such
  Series shall be payable;
 
   (13) if the principal of or interest, if any, on the Securities of such
  Series is to be payable, at the election of the Company or a Holder there-
  of, in a currency or currencies other than that in which the Securities
  are stated to be payable, the period or periods within which, and the
  terms and conditions upon which, such election may be made;
 
   (14) if the amount of payments of principal of or interest, if any, on
  such Securities of the Series may be determined with reference to an index
  based on a currency or currencies other than that in which the Securities
  are stated to be payable, the manner in which such amounts shall be deter-
  mined;
 
   (15) whether and under what circumstances the Company will pay any addi-
  tional amounts on the Securities of such Series in respect of any tax, as-
  sessment or governmental charge and, if so, whether the Company will have
  the option to redeem the Securities of such Series in lieu of making such
  payment;
 
   (16) any provisions relating to the issuance of the Securities of any Se-
  ries as Original Issue Discount Securities (including, without limitation,
  the issue price thereof, the rate or rates at which such original issue
  discount shall accrue, if any, and the date or dates from or to which, or
  period or periods during which, such original issue discount shall accrue
  at such rate or rates);
 
   (17) if other than denominations of $1,000 and integral multiples there-
  of, the denominations in which Securities of any such Series shall be is-
  sued; and
 
   (18) any other terms of the Securities of such Series; provided, that
  such other terms shall not be inconsistent with any express terms of this
  Indenture or in conflict with any express terms of any other Series of Se-
  curities which shall be issued and outstanding.
 
 All Securities of any one Series shall be substantially identical in form ex-
cept as to denomination and except as may be otherwise provided in and pursu-
ant to the Authorizing Resolutions and/or supplemental indenture (if any) re-
lating thereto.
<PAGE>
 
 
                                      12
 
 All Securities of any one Series need not be issued at the same time and may
be issued from time to time, consistent with this Indenture, if so provided by
or pursuant to such Authorizing Resolution and/or supplemental indenture (if
any) relating thereto.
 
 Any such Authorizing Resolution with respect to the Securities of any Series
filed with the Trustee on or before the initial issuance of the Securities of
such Series shall be incorporated herein by reference with respect to Securi-
ties of such Series and shall thereafter be deemed to be a part of this Inden-
ture for all purposes relating to the Securities of such Series as if such Au-
thorizing Resolution were set forth herein in full.
 
 Section 2.03. Execution and Authentication.
 
 Two Officers or an Officer and the Secretary of the Company shall sign the
Securities for the Company by manual or facsimile signature. The Company's
seal shall be reproduced on the Securities and may be in facsimile form.
 
 If an Officer or a Secretary whose signature is on a Security no longer holds
that office at the time the Trustee authenticates the Security, the Security
shall be valid nevertheless.
 
 A Security shall not be valid until the Trustee manually signs the certifi-
cate of authentication on the Security. The signature shall be conclusive evi-
dence that the Security has been authenticated under this Indenture.
 
 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, together with a Company Order for the authentication
and delivery of such Securities. The Company Order may provide that the Secu-
rities which are the subject thereof shall be authenticated and delivered by
the Trustee upon the telephonic, written or other order of persons designated
in the Company Order, and that such persons are authorized to specify the
terms and conditions of such Securities, to the extent permitted by the Autho-
rizing Resolution and/or supplemental indenture (if any) relating thereto. The
Trustee shall execute and deliver the supplemental indenture (if any) relating
to said Securities and the Trustee shall authenticate and deliver said Securi-
ties as specified in such Company Order; provided that, prior to authentica-
tion and delivery of the first Securities of any Series, the Trustee shall
have received:
 
   (1) a copy of the Authorizing Resolution, with a copy of the form of Se-
  curity approved thereby attached thereto, or a supplemental indenture in
  respect of the issuance of the Series, executed on behalf of the Company;
<PAGE>
 
 
                                      13
 
   (2) an Officers' Certificate to the effect that the Securities of such
  Series comply or will comply with the requirements of this Indenture and
  the said Authorizing Resolution and/or supplemental indenture (if any);
 
   (3) an Opinion of Counsel (a) to the effect that (i) the Securities of
  such Series, the Authorizing Resolution and/or the supplemental indenture
  (if any) relating thereto comply or will comply with the requirements of
  this Indenture, and (ii) the Securities of such Series, when authenticated
  and delivered by the Trustee in accordance with the said Company Order,
  will constitute valid and binding obligations of the Company enforceable
  in accordance with their terms, subject to (A) bankruptcy and other laws
  affecting creditors' rights generally as in effect from time to time, (B)
  limitations of generally applicable equitable principles and (C) other ex-
  ceptions acceptable to the Trustee and its counsel; and (b) relating to
  such other matters as may reasonably be requested by the Trustee or its
  counsel; and
 
   (4) if the Securities to be issued are Original Issue Discount Securi-
  ties, an Officers' Certificate setting forth the Yield to Maturity for the
  Securities or other information sufficient to compute amounts due on ac-
  celeration, or specifying the manner in which such amounts are to be de-
  termined, provided that such Yield to Maturity and other facts are not
  specified in the form of the Securities.
 
 Subject to Section 7.01 hereof, the Trustee shall be fully protected in rely-
ing upon the documents delivered to it as provided above in connection with
the issuance of any Series of Securities.
 
 The Trustee shall have the right to decline to authenticate and deliver any
Securities under this Section 2.03 if the Trustee, being advised by counsel,
determines that such action may not lawfully be taken or if the Trustee in
good faith by a committee of its Trust Officers shall determine that such ac-
tion would expose the Trustee to liability to Holders of previously issued and
outstanding Securities.
 
 Each Security shall be dated the date of its authentication unless otherwise
specified in the Authorizing Resolution and/or supplemental indenture relating
thereto.
 
 The Trustee may appoint an authenticating agent reasonably acceptable to the
Company to authenticate Securities. An authenticating agent may authenticate
Securities whenever the Trustee may do so. Each reference in this Indenture to
authentication by the Trustee includes authentication by such agent. An au-
thenticating agent has the same rights as an Agent to deal with the Company or
an Affiliate of the Company.
<PAGE>
 
 
                                      14
 
 The Securities of each Series shall be issuable only in registered form with-
out coupons and only in denominations of $1,000 and any integral multiple
thereof, or in such other currencies or denominations as may be specified in,
or pursuant to, the Authorizing Resolution and/or supplemental indenture (if
any) relating to the Series.
 
 If Securities of any Series are to be issued in the form of one or more
Global Securities, then the Company shall deliver such Global Security or Se-
curities executed by the Company to the Trustee, together with a Company Order
for the authentication and delivery of such Global Security or Securities, and
the Trustee shall, in accordance with this Section 2.03 and such Company Or-
der, authenticate and deliver such Global Security or Securities that (i)
shall represent and shall be denominated in an amount equal to the aggregate
principal amount of all of the Securities of such Series to be issued in the
form of such Global Security or Securities and not yet cancelled, (ii) shall
be registered in the name of the Depository for such Global Security or Secu-
rities or the nominee of such Depository, (iii) shall be delivered by the
Trustee to such Depository or pursuant to such Depository's instructions and
(iv) shall bear a legend substantially to the following effect: "Unless and
until this Security is exchanged in whole or in part for Securities in certif-
icated form, this Security may not be transferred except as a whole by the De-
pository to a nominee of the Depository or by a nominee of the Depository to
the Depository or another nominee of the Depository or by the Depository or
its nominee to a successor Depository or its nominee."
 
 Each Depository designated must, at the time of its designation and at all
times while it serves as Depository, be a clearing agency registered under the
Securities Exchange Act of 1934, as amended, and any other applicable statute
or regulation.
 
 Section 2.04. Registrar, Paying Agent and Conversion Agent.
 
 The Company shall cause to be kept a register (the "Security Register") at an
office or agency where Securities may be presented for registration of trans-
fer or for exchange ("Registrar"), an office or agency where Securities may be
presented for payment ("Paying Agent"), and, if applicable, an office or
agency where Securities may be presented for conversion ("Conversion Agent").
The Company may have one or more co-Registrars and one or more additional pay-
ing agents. The term "Paying Agent" includes any additional paying agent.
 
 The Company shall enter into an appropriate agency agreement with any Agent
not a party to this Indenture. The agreement shall implement the provi-
<PAGE>
 
 
                                      15
sions of this Indenture that relate to such Agent. The Company shall give
prompt written notice to the Trustee of the name and address of any such Agent
and the Trustee shall have the right to inspect the Security Register at all
reasonable times and to obtain copies thereof. If the Registrar shall not be
the Trustee in respect of any Series, the Company shall promptly notify the
Registrar as to the amounts and terms of each Security of such Series which
shall be authenticated and delivered hereunder, and as to the names in which
such Securities shall be registered. If the Company fails to maintain a Regis-
trar, Paying Agent or Conversion Agent, the Trustee shall act as such and
shall be entitled to appropriate compensation therefor pursuant to Section
7.07.
 
 The Company initially appoints the Trustee as Registrar, Paying Agent and
Conversion Agent.
 
 Section 2.05. Paying Agent to Hold Money In Trust.
 
 Each Paying Agent shall hold in trust for the benefit of Securityholders or
the Trustee all money held by the Paying Agent for the payment of principal of
or interest on the Securities (whether such money has been paid to it by the
Company or any other obligor on the Securities), and shall notify the Trustee
of any default by the Company (or any other obligor on the Securities) in mak-
ing any such payment. If the Company or a Subsidiary acts as Paying Agent, it
shall segregate the money and hold it as a separate trust fund. The Company at
any time may require a Paying Agent to pay all money held by it to the Trustee
and account for any funds disbursed and the Trustee may at any time during the
continuance of any payment default, upon written request to a Paying Agent,
require such Paying Agent to pay all money held by it to the Trustee and to
account for any funds disbursed. Upon doing so the Paying Agent shall have no
further liability for the money.
 
 Section 2.06. Securityholder Lists.
 
 The Trustee shall preserve in as current a form as is reasonably practicable
the most recent list furnished to it of the names and addresses of
Securityholders. If the Trustee is not the Registrar, the Company shall fur-
nish to the Trustee ten days before each Interest Payment Date and at such
other times as the Trustee may request in writing a list in such form and as
of such date as the Trustee may reasonably require of the names and addresses
of Holders of Securities of any Series and the Company shall otherwise comply
with Section 312(a) of the TIA.
 
 The Trustee shall be entitled to rely upon a certificate of the Registrar,
the Company or such other Paying Agent, as the case may be, as to the names
and
<PAGE>
 
 
                                      16
addresses of the Holders of Securities of any Series and the principal amounts
and serial numbers of such Securities.
 
 Section 2.07. Transfer and Exchange.
 
 When Securities are presented to the Registrar or a co-Registrar with a re-
quest to register the transfer or to exchange them for an equal principal
amount of Securities of the same Series and Stated Maturity of other autho-
rized denominations, the Registrar shall register the transfer or make the ex-
change as requested if its requirements for such transactions are met. To per-
mit registrations of transfers and exchanges, the Company shall execute and
the Trustee shall authenticate Securities at the Registrar's request. No serv-
ice charge shall be made to any Holder for any registration of transfer or ex-
change, but the Company or the Trustee may require payment of a sum sufficient
to cover any transfer tax or similar governmental charge payable in connection
therewith (other than any such transfer taxes or similar governmental charge
payable upon exchanges pursuant to Section 2.11, 3A.08 or 9.05 in which case
such transfer taxes or similar governmental charges shall be paid by the Com-
pany).
 
 The Company shall not be required (i) to issue, register the transfer of or
exchange any Security of any Series during a period beginning at the opening
of the day which is 15 Business Days before the day of the mailing of a notice
of redemption of Securities of such Series selected for redemption under Sec-
tion 3A.04 or 3B.01 and ending at the close of business on the day of such
mailing, or (ii) to register the transfer of or exchange any Security so se-
lected for redemption in whole or in part, except, in the case of any Security
to be redeemed in part, the portion thereof not to be redeemed.
 
 Notwithstanding any other provision of this Section 2.07, unless and until it
is exchanged in whole or in part for Securities in definitive registered form,
a Global Security representing all or part of the Securities of a Series may
not be transferred except as a whole by the Depository for such Series to a
nominee of such Depository or by a nominee of such Depository to such Deposi-
tory or another nominee of such Depository or by such Depository or any such
nominee to a successor Depository for such Series or a nominee of such succes-
sor Depository.
 
 If at any time the Depository for any Securities of a Series represented by
one or more Global Securities notifies the Company that it is unwilling or un-
able to continue as Depository for such Series or if at any time the Deposi-
tory for such
<PAGE>
 
 
                                      17
Series shall no longer be eligible under Section 2.03, the Company shall ap-
point a successor Depository with respect to such Series. If a successor De-
pository for such Series is not appointed by the Company within 90 days after
the Company receives such notice or becomes aware of such ineligibility, the
Company's election that the Securities be represented by one or more Global
Securities pursuant to Section 2.02 shall no longer be effective and the Com-
pany shall deliver Securities of such Series executed by the Company to the
Trustee, together with a Company Order for the authentication and delivery of
such Securities, and the Trustee shall, in accordance with Section 2.03 and
such Company Order, authenticate and deliver Securities of such Series, in any
authorized denominations, in an aggregate principal amount equal to the prin-
cipal amount of the Global Security or Securities representing such Series in
exchange for such Global Security or Securities.
 
 The Company may at any time and in its sole discretion determine that the Se-
curities of any Series issued in the form of one or more Global Securities
shall no longer be represented by a Global Security or Securities. In such
event the Company shall deliver Securities of such Series executed by the Com-
pany to the Trustee, together with a Company Order for the authentication and
delivery of such Securities, and the Trustee shall, in accordance with Section
2.03 and such Company Order, authenticate and deliver Securities of such Se-
ries, in any authorized denominations, in an aggregate principal amount equal
to the principal amount of the Global Security or Securities representing such
Series, in exchange for such Global Security or Securities.
 
 If specified by the Company in the Authorizing Resolution and/or supplemental
indenture (if any) relating to the Securities of a Series represented by a
Global Security, the Depository for such Series may surrender such Global Se-
curity in exchange in whole or in part for Securities of the same Series on
such terms as are acceptable to the Company and the Depository. Thereupon, the
Company shall deliver Securities of such Series executed by the Company to the
Trustee, together with a Company Order for the authentication and delivery of
such Securities, and the Trustee shall, in accordance with Section 2.03 and
such Company Order, authenticate and deliver, without charge,
 
   (1) to the person specified by such Depository, a new Security or Securi-
  ties of the same Series, in any authorized denominations as requested by
  such person, in an aggregate principal amount equal to and in exchange for
  such person's beneficial interest in the Global Security; and
<PAGE>
 
 
                                      18
 
   (2) to such Depository a new Global Security in a denomination equal to
  the difference, if any, between the principal amount of the surrendered
  Global Security and the aggregate principal amount of Securities authenti-
  cated and delivered pursuant to clause (1) above.
 
 Upon the exchange of a Global Security for the Securities of a Series repre-
sented thereby, in authorized denominations, such Global Security shall be
cancelled by the Trustee or an Agent of the Company or the Trustee. Securities
of a Series issued in exchange for a Global Security pursuant to this Section
2.07 shall be registered in such names and in such authorized denominations as
the Depository for such Global Security, pursuant to instructions from its di-
rect or indirect participants or otherwise, shall instruct the Trustee or an
Agent of the Company or the Trustee. The Trustee or such Agent shall deliver
at its office such Securities to or as directed by the persons in whose names
such Securities are so registered.
 
 Section 2.08. Replacement Securities.
 
 If a mutilated Security is surrendered to the Trustee or if the Holder of a
Security claims that the Security has been lost, destroyed or wrongfully tak-
en, the Company shall issue and the Trustee shall authenticate a replacement
Security of like tenor, Series and principal amount, bearing a number not as-
signed to any Security of the same Series then outstanding, if the Trustee's
requirements are met. If required by the Trustee or the Company, an indemnity
bond must be sufficient in the judgment of the Trustee to protect the Company,
the Trustee or any Agent from any loss which any of them may suffer if a Secu-
rity is replaced. The Company may charge such Holder for its expenses in re-
placing a Security.
 
 Every replacement Security is an additional obligations of the Company.
 
 Section 2.09. Outstanding Securities.
 
 Securities, or Securities of any particular Series, outstanding at any time
are all such Securities that have been authenticated and delivered by the
Trustee except for those cancelled by it, those delivered to it for cancella-
tion and those described in this Section as not outstanding. A Security does
not cease to be outstanding because the Company or one of its Affiliates holds
the Security.
 
 If a Security is replaced pursuant to Section 2.08, it ceases to be outstand-
ing unless the Trustee receives proof satisfactory to it that the replaced Se-
curity is held by a bona fide purchaser.
<PAGE>
 
 
                                      19
 
 If the Trustee or Paying Agent (other than the Company or a Subsidiary) holds
on the Maturity Date or Redemption Date money sufficient to pay Securities
payable on such date, then on and after that date such Securities cease to be
outstanding and interest on them ceases to accrue; provided that, if such Se-
curities are to be redeemed, notice of such redemption has been duly given
pursuant to this Indenture or provisions therefor satisfactory to the Trustee
have been made.
 
 If a Security is converted into Common Stock pursuant to Article 11 hereof,
then such Security shall cease to be outstanding.
 
 Section 2.10. Treasury Securities.
 
 In determining whether the Holders of the required principal amount of Secu-
rities of any Series have concurred in any direction, waiver or consent (a)
the principal amount of an Original Issue Discount Security, if any, of such
Series that shall be deemed to be outstanding for such purposes shall be the
amount that would be due and payable as of the date of determination upon a
declaration of acceleration thereof pursuant to Section 6.02 and (b) Securi-
ties of such Series owned by the Company or an Affiliate of the Company shall
be disregarded, except that for the purposes of determining whether the
Trustee shall be protected in relying on any such direction, waiver or con-
sent, only Securities of such Series which the Trustee actually knows are so
owned shall be so disregarded. Upon the request of the Trustee, the Company
shall furnish to the Trustee an Officers' Certificate identifying all Securi-
ties of such Series, if any, known by the Company to be owned by it or any of
its Affiliates.
 
 Section 2.11. Temporary Securities.
 
 Until definitive Securities of any Series are ready for delivery, the Company
may prepare and execute and, upon compliance with the requirements of Section
2.03, the Trustee shall authenticate temporary Securities of such Series. Tem-
porary Securities of any Series shall be substantially in the form of defini-
tive Securities of such Series but may have variations that the Company con-
siders appropriate for temporary Securities. In the case of Securities of any
Series, such temporary Securities may be in global form. Except in the case of
temporary Global Securities (which shall be exchanged as otherwise provided
herein or as otherwise provided in or pursuant to the Authorizing Resolution
and/or supplemental indenture (if any) relating thereto, without unreasonable
delay, the Company shall prepare and the Trustee shall authenticate definitive
Securities for such
<PAGE>
 
 
                                      20
Series in exchange for temporary Securities of such Series in an exchange pur-
suant to Section 2.07.
 
 Section 2.12. Cancellation.
 
 The Company at any time may deliver Securities to the Trustee for cancella-
tion. The Registrar and the Paying Agent shall forward to the Trustee any Se-
curities surrendered to them for transfer, exchange or payment. The Trustee
and no one else shall cancel all Securities surrendered for transfer, ex-
change, payment or cancellation or for credit against any Sinking Fund Payment
in respect of such Series pursuant to Section 3B.02. The Company may not issue
new Securities to replace Securities it has paid or delivered to the Trustee
for cancellation.
 
 Section 2.13. Defaulted Interest.
 
 If the Company defaults in a payment of interest on the Securities of any Se-
ries, it shall pay the defaulted interest, plus any interest payable on the
defaulted interest, to the persons who are Holders of such Securities on a
subsequent special record date ("Special Record Date") and such term, as used
in this Section 2.13 with respect to the payment of any defaulted interest,
shall mean the fifteenth day next preceding the date fixed by the Company for
the payment of defaulted interest, whether or not such day is a Business Day.
At least 15 days before the Special Record Date, the Company shall mail to
each holder of such Securities a notice that states the Special Record Date,
the payment date and the amount of defaulted interest to be paid.
 
 Section 2.14. Persons Deemed Owners.
 
 The Company, the Trustee and any agent may treat the persons in whose name
any Security is registered as the owners of such Security for the purpose of
receiving payment of principal of and (subject to Section 2.13) interest on
such Security and for all other purposes whatsoever, whether or not such Secu-
rity shall have matured, and neither the Company, the Trustee nor any Agent
shall be affected by any notice to the contrary.
<PAGE>
 
 
                                      21
 
                                  ARTICLE 3A
 
                                  Redemption
 
 Section 3A.01. Right of Redemption.
 
 Redeemable Securities may be redeemed otherwise than through the operation of
the Sinking Fund provided for in Article 3B at the election of the Company at
the times, on the conditions and at the Redemption Prices specified therein,
in (or pursuant to) the Authorizing Resolution relating thereto or in the sup-
plemental indenture (if any) executed in connection with the issuance of such
Securities to the extent provided therein, any Redemption Price to be accompa-
nied by accrued interest to the Redemption Date.
 
 Section 3A.02. Applicability of Article.
 
 Redemption of Securities at the election of the Company or otherwise, as per-
mitted or required by any provision referred to in Section 3A.01, shall be
made in accordance with such provision and this Article.
 
 Section 3A.03. Election to Redeem; Notice to Trustee.
 
 The Election of the Company to redeem any Securities of any Series shall be
evidenced by a Board Resolution or set forth in an Officers' Certificate which
states that such election has been duly authorized by all requisite corporate
action on the part of the Company. In case of any redemption at the election
of the Company of less than all of the Securities of such Series the Company
shall, at least 60 days prior to the Redemption Date fixed by the Company (un-
less a shorter notice shall be satisfactory to the Trustee), notify the
Trustee of such Redemption Date and of the principal amount of Securities of
the Series or the several Series, as the case may be, to be redeemed. In the
case of any redemption of Securities prior to the expiration of any restric-
tion on such redemption provided in the Securities or elsewhere in this Inden-
ture, the Company shall furnish the Trustee with an Officers' Certificate evi-
dencing compliance with such restriction.
 
 Section 3A.04. Selection by Trustee of Securities to be Redeemed.
 
 If less than all the Securities of any Series are to be redeemed, the partic-
ular Securities of such Series to be redeemed shall be selected not more than
90 days
<PAGE>
 
 
                                      22
prior to the Redemption Date by the Trustee, from the outstanding Securities
of such Series not previously called for redemption, in compliance with the
requirements of the principal national securities exchange, if any, on which
such Securities are listed or, if the Securities are not listed on a national
securities exchange, on a pro rata basis or by lot, as the Trustee deems ap-
propriate in its sole discretion. The Trustee may select for redemption por-
tions (equal to the minimum authorized denomination of the Series or any inte-
gral multiple thereof) of the principal amount of such Securities of a denomi-
nation larger than such minimum denomination. If the Company shall so specify,
Securities held by the Company or any of its Subsidiaries or Affiliates shall
not be included in the Securities selected for redemption.
 
 The Trustee shall promptly notify the Company in writing of the Securities
selected for redemption and, in the case of any Securities selected for par-
tial redemption, the principal amount thereof to be redeemed.
 
 For all purposes of this Indenture, unless the context otherwise requires,
all provisions relating to the redemption of Securities shall relate, in the
case of any Securities redeemed or to be redeemed only in part, to the portion
of the principal amount of such Security which has been or is to be redeemed.
 
 If any Security selected for partial redemption is surrendered for conversion
after such selection, the converted portion of such Security shall be deemed
(so far as may be) to be the portion selected for redemption. Upon any redemp-
tion of less than all the Securities of a Series, for purposes of selection
for redemption the Company and the Trustee may treat outstanding Securities
surrendered for conversion during the period of 15 days next preceding the
mailing of a notice of redemption, and need not treat as outstanding any Secu-
rity authenticated and delivered during such period in exchange for the uncon-
verted portion of any Security converted in part during such period.
 
 Section 3A.05  Notice of Redemption.
 
 Notice of redemption shall be given by first class mail, postage prepaid,
mailed not less than 30 nor more than 60 days prior to the Redemption Date, to
each Holder of Securities to be redeemed, at his address appearing in the Se-
curity Register.
 
 All notices of redemption shall state:
 
   (1) the Redemption Date;
 
   (2) the Redemption Price;
<PAGE>
 
 
                                      23
 
   (3) if less than all outstanding Securities of the Series are to be re-
  deemed, the identification (and, in the case of partial redemption, the
  principal amount) of the particular Securities to be redeemed;
 
   (4) that on the Redemption Date the Redemption Price will become due and
  payable upon each such Security, and that interest thereon shall cease to
  accrue on and after said date;
 
   (5) that the redemption is for a Sinking Fund, if such is the case;
 
   (6) the place or places where such Securities are to be surrendered for
  payment of the Redemption Price; and
 
   (7) if applicable, the Conversion Price then in effect and the date on
  which the right to convert such Securities or the portions thereof to be
  redeemed will expire.
 
 Notice of redemption of Securities to be redeemed at the election of the Com-
pany shall be given by the Company or, at the Company's request, by the
Trustee in the name of and at the expense of the Company.
 
 Section 3A.06. Deposit of Redemption Price.
 
 On or prior to any Redemption Date, the Company shall deposit with the
Trustee or with a Paying Agent (or, if the Company is acting as its own Paying
Agent, segregate and hold in trust as provided in Section 2.05) an amount of
money sufficient to pay the Redemption Price of, and (except if the Redemption
Date shall be an Interest Payment Date) any accrued interest on, all the Secu-
rities or portions thereof which are to be redeemed on that date (other than
Securities or portions thereof surrendered for conversion into Common Stock).
If any Security called for redemption is converted into Common Stock pursuant
hereto, any monies deposited with the Trustee or a Paying Agent or so segre-
gated and held in trust for the redemption of such Security shall be paid to
the Company upon the Company's request, or, if then held by the Company, shall
be discharged from such trust.
 
 Section 3A.07. Securities Payable on Redemption Date.
 
 Notice of redemption having been given as aforesaid, the Securities so to be
redeemed shall, on the Redemption Date, become due and payable at the Redemp-
tion Price thereof and from and after such date (unless the Company shall de-
fault in the payment of the Redemption Price and accrued interest) such Secu-
rities shall cease to bear interest and from and after such date (unless an
earlier date shall be specified in the Authorizing Resolution or supplemental
indenture
<PAGE>
 
 
                                      24
(if any) pursuant to which the terms of the Securities of such Series were es-
tablished) such Securities shall cease to be convertible into Common Stock.
Upon surrender of any such Security for redemption in accordance with said no-
tice such Security shall be paid by the Company at the Redemption Price, to-
gether with accrued interest to the Redemption Date; provided, however, that
installments of interest whose Stated Maturity is on or prior to the Redemp-
tion Date shall be payable to the Holders of such Securities registered as
such on the relevant Regular or Special Record Date according to their terms
and the provisions of such Security and Section 2.13.
 
 If any Security called for redemption shall not be so paid upon surrender
thereof for redemption, the principal shall, until paid or duly provided for,
bear interest from the Redemption Date at the rate borne by the Security or,
in the case of Original Issue Discount Securities, at a rate equal to the
Yield to Maturity thereof, and such Security shall remain convertible into
Common Stock until the Redemption Price of such Security (together with such
interest thereon) shall have been paid or duly provided for.
 
 Section 3A.08. Securities Redeemed in Part.
 
 Any Security which is to be redeemed only in part shall be surrendered at the
office or agency of the Company maintained for that purpose pursuant to Sec-
tion 4.02 (with, if the Company or the Trustee so requires, due endorsement
by, or a written instrument of transfer in form satisfactory to the Company
and the Trustee duly executed by, the Holder thereof or his attorney duly au-
thorized in writing), and the Company shall execute and the Trustee shall au-
thenticate and deliver to the Holder of such Security, without service charge,
a new Security or Securities of the same Series, of any authorized denomina-
tion as requested by such Holder in aggregate principal amount equal to and in
exchange for the unredeemed portion of the principal of the Security so sur-
rendered.
 
                                  ARTICLE 3B
 
                                 Sinking Fund
 
 Section 3B.01. Sinking Fund Payments.
 
 As and for a Sinking Fund for the retirement of Sinking Fund Securities, the
Company will, until all such Securities are paid or payment thereof is duly
provided for, deposit in accordance with Section 3A.06, at such times and sub-
ject to such terms and conditions as shall be specified in the provisions of
such
<PAGE>
 
 
                                      25
Securities and the Authorizing Resolution and/or supplemental indenture (if
any) relating thereto, such amounts in cash or such other Required Currency as
shall be required or permitted under such provisions in order to redeem Secu-
rities on the specified Redemption Dates at a Redemption Price equal to their
principal amounts, less in each such case the amount of any credit against
such payment received by the Company under Section 3B.02. Each such Sinking
Fund payment shall be applied to the redemption of Securities on the specified
Redemption Date as herein provided.
 
 Section 3B.02. Satisfaction of Sinking Fund Payments with Securities.
 
 The Company (1) may deliver Securities of the same Series (other than any Se-
curities of such Series previously called for redemption pursuant to the Sink-
ing Fund or theretofore applied as a credit against a Sinking Fund payment),
(2) may apply as a credit Securities of the same Series redeemed at the elec-
tion of the Company pursuant to Section 3A.01 or through the operation of the
Sinking Fund in any period in excess of the minimum amount required for such
period under Section 3B.01 and not theretofore applied as a credit against a
Sinking Fund payment, or (3) may apply as credit Securities of the same Series
(not previously so credited) converted into Common Stock and so delivered to
the Trustee for cancellation, in each case in satisfaction of all or any part
of any Sinking Fund payment required to be made pursuant to Section 3B.01.
Each such Security so delivered or applied shall be credited for such purpose
by the Trustee at a Redemption Price equal to its principal amount or, in the
case of an Original Issue Discount Security, its then accreted value, and the
required amount of such Sinking Fund payment in respect of such Series shall
be reduced accordingly.
 
 Section 3B.03. Redemption of Securities for Sinking Fund.
 
 If in any year the Company shall elect to redeem in excess of the minimum
principal amount of Securities of any Series required to be redeemed pursuant
to Section 3B.01 or to satisfy all or any part of any Sinking Fund payment by
delivering or crediting Securities of the same Series pursuant to Section
3B.02, then at least 45 days prior to the date on which the Sinking Fund pay-
ment in question shall be due, the Company shall deliver to the Trustee an Of-
ficers' Certificate specifying the amount of the Sinking Fund payment and the
portions thereof which are to be satisfied by payment of cash or such other
Required Currency, by delivery of Securities of such Series or by crediting
Securities of such Series (including Securities of such Series previously con-
verted into Common Stock), and, at least 45 days prior to the Sinking Fund
payment date (or such
<PAGE>
 
 
                                      26
shorter period as shall be approved by the Trustee), will also deliver to the
Trustee the Securities of such Series to be so delivered. Such Officers' Cer-
tificate shall also state that the Securities forming the basis of any such
credit do not include any Securities which have been redeemed through the op-
eration of the Sinking Fund in the minimum amount required under Section 3B.01
or previously credited against any Sinking Fund payment. The Trustee shall,
upon the receipt of such Officers' Certificate (or, if it shall not have re-
ceived such an Officers' Certificate at least 45 days prior to the Sinking
Fund payment date, then following such 45th day), select the Securities of
such Series to be redeemed upon the next Sinking Fund payment date, in the
manner specified in Section 3A.04, and cause notice of the redemption thereof
to be given in the name of and at the expense of the Company in the manner
provided in Section 3A.05. Such notice having been duly given, the redemption
of such Securities shall be made upon the terms and in the manner stated in
Sections 3A.06, 3A.07 and 3A.08.
 
                                   ARTICLE 4
 
                                   Covenants
 
 Section 4.01. Payment of Securities.
 
 The Company shall pay the principal of and interest on the Securities of each
Series on the dates and in the manner provided in the Securities and in this
Indenture. An installment of principal or interest shall be considered paid on
the date due if the Trustee or Paying Agent (other than the Company or a Sub-
sidiary) holds on that date money designated for and sufficient to pay the in-
stallment.
 
 The Company shall pay interest on overdue principal at the respective rates
borne by such Securities or, in the case of Original Issue Discount Securi-
ties, at rates equal to the respective Yields to Maturity thereof; it shall
pay interest on overdue installments of interest at the respective rates borne
by such Securities to the extent lawful.
 
 Section 4.02. Maintenance of Office or Agency.
 
 Except as otherwise provided in the Authorizing Resolutions and/or supplemen-
tal indenture (if any) relating to any Series, the Company will maintain in
The City of New York, an office or agency where Securities may be surrendered
for registration of transfer or exchange, for presentation for payment or, if
applicable, for conversion, and where notices and demands to or upon the Com-
pany in respect to the Securities and this Indenture may be served. The Com-
pany will
<PAGE>
 
 
                                      27
give prompt written notice to the Trustee of the location, and any change in
the location, of such office or agency. If at any time the Company shall fail
to maintain any such required office or agency or shall fail to furnish the
Trustee with the address thereof, such presentations, surrenders, notices and
demands may be made or served at the Corporate Trust Office.
 
 The Company may also from time to time designate one or more other offices or
agencies where the Securities of any Series or a particular Series may be pre-
sented or surrendered for any or all such purposes and may from time to time
rescind such designations; provided, that no such designation or rescission
shall in any manner relieve the Company of its obligation to maintain an of-
fice or agency in The City of New York, for such purposes. The Company will
give prompt written notice to the Trustee of any such designation or rescis-
sion and of any change in the location of any such other office or agency.
 
 The Company hereby initially designates the Trustee in The City of New York,
as an agency of the Company in accordance with Section 2.04.
 
 Section 4.03. Corporate Existence.
 
 Subject to Article 5, the Company will do or cause to be done all things nec-
essary to preserve and keep in full force and effect its corporate existence
and the rights (charter and statutory) and material franchises of the Company;
provided, however, that the Company shall not be required to preserve any such
right or franchise if the Board of Directors or management of the Company
shall determine that the preservation thereof is no longer desirable in the
conduct of the business of the Company and its Subsidiaries, taken as a whole,
and if the loss thereof is not, and will not be, adverse in any material re-
spect to the Holders.
 
 Section 4.04. Compliance Certificate.
 
 The Company shall deliver to the Trustee within 90 days after the end of each
fiscal quarter of the Company an Officers' Certificate stating whether or not
the signers know of the existence of any Default or Event of Default by the
Company and whether all of the conditions and covenants of the Company are be-
ing complied with regardless of any period of grace or requirement of notice
provided under this Indenture. If they do know of such a Default or Event of
Default, the certificate shall describe the Default or Event of Default, as
the case may be, and its status. The first Officers' Certificate to be deliv-
ered pursuant to this Section 4.04 shall be for the fiscal quarter ending im-
mediately after the Original Issue Date.
<PAGE>
 
 
                                      28
 
 Section 4.05. SEC Reports.
 
 (a) The Company shall file with the Trustee within 15 days after it files
them with the SEC copies of the annual reports and of the information, docu-
ments and other reports (or copies of such portions of any of the foregoing as
the SEC may by rules and regulations prescribe) which the Company is required
to file with the SEC pursuant to Section 13 or 15(d) of the Securities Ex-
change Act of 1934, as amended. The Company also shall comply with the other
provisions of TIA (S) 314(a).
 
 (b) So long as the Securities of any Series remain outstanding, the Company
shall cause its annual report to stockholders and any quarterly or other fi-
nancial reports furnished by it to stockholders to be mailed to the Holders of
Securities outstanding at the their addresses appearing in the Security Regis-
ter.
 
 Section 4.06. Waiver of Stay, Extension or Usury Laws.
 
 The Company covenants (to the extent that it may lawfully do so) that it will
not at any time insist upon, plead, or in any manner whatsoever claim or take
the benefit or advantage of, any stay or extension law or any usury law or
other law, which would prohibit or forgive the Company from paying all or any
portion of the principal of and/or interest on the Securities of any Series as
contemplated herein, whenever enacted, now or at any time hereafter in force,
or which may affect the covenants or the performance of this Indenture, and
(to the extent that it may lawfully do so) the Company hereby expressly waives
all benefit or advantage of any such law, and covenants that it will not hin-
der, delay or impede the execution of any power herein granted to the Trustee
but will suffer and permit the execution of every such power as though no law
had been enacted.
 
                                   ARTICLE 5
 
                             Successor Corporation
 
 Section 5.01. When Company May Merge, etc.
 
 The Company shall not consolidate with or merge with or into any other corpo-
ration or transfer all or substantially all of its properties and assets as an
entirety to any person, unless:
 
   (1) either the Company shall be the continuing person, or the person (if
  other than the Company) formed by such consolidation or into which the
  Company is merged or to which all or substantially all of the properties
  and
<PAGE>
 
 
                                      29
  assets of the Company as an entirety are transferred shall be a corpora-
  tion organized and existing under the laws of the United States or any
  State thereof or the District of Columbia and shall expressly assume, by
  an indenture supplemental hereto, executed and delivered to the Trustee,
  in form satisfactory to the Trustee, all the obligations of the Company
  under the Securities of each Series and this Indenture and shall expressly
  provide for the conversion rights, if any, in accordance with this Inden-
  ture;
 
   (2) immediately before and immediately after giving effect to such trans-
  action, no Event of Default and no Default shall have occurred and be con-
  tinuing; and
 
   (3) the Company shall have delivered to the Trustee an Officers' Certifi-
  cate and an Opinion of Counsel, each stating that such consolidation,
  merger or transfer and such supplemental indenture comply with this Arti-
  cle and that all conditions precedent herein provided for relating to such
  transactions have been complied with.
 
 Notwithstanding the foregoing, any Subsidiary may consolidate with, merge
with or into or transfer all or part of its properties and assets to the Com-
pany or any other Subsidiary or Subsidiaries.
 
 Section 5.02. Successor Corporation Substituted.
 
 Upon any consolidation or merger, or any transfer of all or substantially all
of the properties and assets of the Company in accordance with Section 5.01,
the successor corporation formed by such consolidation or into which the Com-
pany is merged or to which such transfer is made shall succeed to, and be sub-
stituted for, and may exercise every right and power of, the Company under
this Indenture with the same effect as if such successor corporation had been
named as the Company herein.
 
                                   ARTICLE 6
 
                             Default and Remedies
 
 Section 6.01. Events of Default.
 
 An "Event of Default" occurs if, with respect to any Series of Securities,
unless it is either inapplicable to a particular Series or it is specifically
deleted or modified in the Authorizing Resolution and/or supplemental inden-
ture (if any) in respect of such Series, and upon any other events which may
be specified as
<PAGE>
 
 
                                      30
Events of Default in the Authorizing Resolution and/or supplemental indenture
(if any) in respect of such Series:
 
   (1) the Company defaults in the payment of interest on any Securities of
  such Series when the same becomes due and payable and the default contin-
  ues for a period of 30 days;
 
   (2) the Company defaults in the payment of the principal of any Securi-
  ties of such Series when the same becomes due and payable at its Maturity
  or otherwise or defaults in the deposit of any Sinking Fund installment in
  respect of such Series, when and as payable by the terms of Section 3B.01
  hereof;
 
   (3) the Company fails to comply with any of its other agreements con-
  tained in the Securities of such Series or this Indenture (other than an
  agreement relating exclusively to another Series of Securities) and the
  default continues for the period and after the notice specified below;
 
   (4) the Company pursuant to or within the meaning of any Bankruptcy Law:
 
     (A) commences a voluntary case or proceeding,
 
     (B) consents to the entry of an order for relief against it in an in-
    voluntary case or proceeding,
 
     (C) consents to the appointment of a Custodian of it or for all or
    substantially all of its property, or
 
     (D) makes a general assignment for the benefit of its creditors; or
 
   (5) a court of competent jurisdiction enters an order or decree under any
  Bankruptcy Law that:
 
     (A) is for relief against the Company in an involuntary case or pro-
    ceeding,
 
     (B) appoints a Custodian of the Company for all or substantially all
    of its properties, or
 
     (C) orders the liquidation of the Company,
 
  and in each case the order or decree remains unstayed and in effect for 60
  days.
 
 The term "Bankruptcy Law" means Title 11, U.S. Code or any similar Federal or
state law for the relief of debtors. The term "Custodian" means any receiver,
trustee, assignee, liquidator, sequestrator or similar official under any
Bankruptcy Law.
<PAGE>
 
 
                                      31
 
 A Default under clause (3) is not an Event of Default until the Trustee noti-
fies the Company, or the Holders of at least 25% in principal amount of the
outstanding Securities of such Series notify the Company and the Trustee, of
the Default and the Company does not cure the Default within 60 days after re-
ceipt of the notice. The notice must specify the Default, demand that it be
remedied and state that the notice is a "Notice of Default." When a Default is
cured, it ceases. Such notice shall be given by the Trustee if so requested by
the Holders of at least 25% in principal amount of the Securities of such Se-
ries then outstanding.
 
 Subject to the provisions of Sections 7.01 and 7.02, the Trustee shall not be
charged with knowledge of any Event of Default unless written notice thereof
shall have been given to a Trust Officer at the corporate trust office of the
Trustee by the Company, the Paying Agent, any Holder or an agent of any Hold-
er.
 
 Section 6.02. Acceleration.
 
 If an Event of Default (other than an Event of Default specified in Section
6.01(4) or (5)) with respect to Securities of any Series occurs and is contin-
uing, the Trustee may, by notice to the Company, or the Holders of at least
25% in principal amount of such Securities of such Series then outstanding
may, by notice to the Company and the Trustee, and the Trustee shall, upon the
request of such Holders, declare all unpaid principal (or, if such Securities
are Original Issue Discount Securities, such portion of the principal amount
as may then be payable on acceleration as provided in the terms thereof) and
accrued interest to the date of acceleration on all such Securities of such
Series then outstanding (if not then due and payable) to be due and payable
and, upon any such declaration, the same shall become and be immediately due
and payable. If an Event of Default specified in Section 6.01(4) or (5) oc-
curs, all unpaid principal (or, if any Securities are Original Issue Discount
Securities, such portion of the principal amount as may then be payable on ac-
celeration as provided in the terms thereof) and accrued interest on all Secu-
rities of every Series then outstanding shall ipso facto become and be immedi-
ately due and payable without any declaration or other act on the part of the
Trustee or any Securityholder. Upon payment of such principal amount and in-
terest, all of the Company's obligations under such Securities of such Series
and this Indenture with respect to such Securities of such Series, other than
obligations under Section 7.07, shall terminate. The Holders of a majority in
principal amount of the Securities of such Series then outstanding by notice
to the Trustee may rescind an acceleration and its consequences if (i) all ex-
isting Events of Default, other than the non-payment of the principal of the
<PAGE>
 
 
                                      32
Securities of such Series which has become due solely by such declaration of
acceleration, have been cured or waived, (ii) to the extent the payment of
such interest is lawful, interest on overdue installments of interest and
overdue principal, which has become due otherwise than by such declaration of
acceleration, has been paid, (iii) the rescission would not conflict with any
judgment or decree of a court of competent jurisdiction and (iv) all payments
due to the Trustee and any predecessor Trustee under Section 7.07 have been
made. Anything herein contained to the contrary notwithstanding, in the event
of any acceleration pursuant to this Section 6.02, the Company shall not be
obligated to pay any premium in connection with any repayment arising from an
Event of Default.
 
 Section 6.03. Other Remedies.
 
 If an Event of Default occurs and is continuing, the Trustee may pursue any
available remedy by proceeding at law or in equity to collect the payment of
principal of or interest on the Securities of the Series as to which the Event
of Default shall have occurred or to enforce the performance of any provision
of such Securities or the Indenture.
 
 The Trustee may maintain a proceeding even if it does not possess any of the
Securities of the Series as to which the Event of Default shall have occurred
or does not produce any of them in the proceeding. A delay or omission by the
Trustee or any Securityholder in exercising any right or remedy accruing upon
an Event of Default shall not impair the right or remedy or constitute a
waiver of or acquiescence in the Event of Default. No remedy is exclusive of
any other remedy. All available remedies are cumulative to the extent permit-
ted by law.
 
 Section 6.04. Waiver of Past Defaults.
 
 Subject to Sections 6.07 and 9.02, the Holders of a majority in principal
amount of the outstanding Securities of a Series by written notice to the
Trustee may waive an existing Default or Event of Default and its conse-
quences, except a Default in the payment of principal of or interest on any
such Security as specified in clauses (1) and (2) of Section 6.01. When a De-
fault or Event of Default is waived, it is cured and ceases.
 
 Section 6.05. Control by Majority.
 
 The Holders of a majority in principal amount of the outstanding Securities
of a Series (or, if more than one Series is affected, of all such Series vot-
ing as a
<PAGE>
 
 
                                      33
single class) may direct the time, method and place of conducting any proceed-
ing for any remedy available to the Trustee or exercising any trust or power
conferred on it. However, the Trustee may refuse to follow any direction that
conflicts with any law or this Indenture that the Trustee determines may be
unduly prejudicial to the rights of another Securityholder, or that may in-
volve the Trustee in personal liability; provided that the Trustee may take
any other action deemed proper by the Trustee which is not inconsistent with
such direction.
 
 Section 6.06. Limitation on Suits.
 
 A Securityholder may not pursue any remedy with respect to this Indenture or
the Securities of the applicable Series unless:
 
   (1) the Holder gives to the Trustee written notice of a continuing Event
  of Default;
 
   (2) the Holders of at least 25% in principal amount of the outstanding
  Securities of the Series in respect of which the Event of Default has oc-
  curred make a written request to the Trustee to pursue a remedy;
 
   (3) such Holder or Holders offer to the Trustee indemnity satisfactory to
  the Trustee against any loss, liability or expense;
 
   (4) the Trustee does not comply with the request within 60 days after re-
  ceipt of the request and the offer of indemnity; and
 
   (5) during such 60-day period the Holders of a majority in principal
  amount of the outstanding Securities of such Series do not give the
  Trustee a direction which, in the opinion of the Trustee, is inconsistent
  with the request.
 
 A Holder of Securities of any Series may not use this Indenture to prejudice
the rights of any other Holders of Securities of that Series or to obtain a
preference or priority over any other Holders of Securities of that Series.
 
 Section 6.07. Rights of Holders to Receive Payment.
 
 Notwithstanding any other provision of this Indenture, but subject to Article
12, the right of any Holder to receive payment of principal of and interest on
the Security, on or after the respective due dates expressed in such Security,
or to bring suit for the enforcement of any such payment on or after such re-
spective dates, shall not be impaired or affected without the consent of such
Holder.
<PAGE>
 
 
                                      34
 
 Section 6.08. Collection Suit by Trustee.
 
 If an Event of Default in payment of interest or principal specified in Sec-
tion 6.01(1) or (2) occurs and is continuing, the Trustee may recover judgment
in its own name and as trustee of an express trust against the Company or any
other obligor on the Securities of the Series in respect of which the Event of
Default has occurred for the whole amount of principal and accrued interest
remaining unpaid, together with interest overdue on principal or, in the case
of Original Issue Discount Securities, the then accreted value, and to the ex-
tent that payment of such interest is lawful, interest on overdue installments
of interest, in each case at the rate per annum borne by such Securities or,
in the case of Original Issue Discount Securities, at a rate equal to the
Yield to Maturity thereof, and such further amount as shall be sufficient to
cover the costs and expenses of collection, including the reasonable compensa-
tion, expenses, disbursements and advances of the Trustee, its agents and
counsel.
 
 Section 6.09. Trustee May File Proofs of Claim.
 
 The Trustee may file such proofs of claim and other papers or documents as
may be necessary or advisable in order to have the claims of the Trustee (in-
cluding any claim for the reasonable compensation, expenses, disbursements and
advances of the Trustee, its agents and counsel) and the Securityholders al-
lowed in any judicial proceedings relative to the Company (or any other obli-
gor upon the Securities), its creditors or its property and shall be entitled
and empowered to collect and receive any monies or other property payable or
deliverable on any such claims and to distribute the same, and any Custodian
in any such judicial proceedings is hereby authorized by each Securityholder
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 Securityholders, to pay
to the Trustee any amount due to it for the reasonable compensation, expenses,
disbursements and advances of the Trustee, its agents and counsel, and any
other amounts due the Trustee under Section 7.07. Nothing herein contained
shall be deemed to authorize the Trustee to authorize or consent to or accept
or adopt on behalf of any Securityholder any plan of reorganization, arrange-
ment, adjustment or composition affecting the Securities of any Series or the
rights of any Holder thereof, or to authorize the Trustee to vote in respect
of the claim of any Securityholder in any such proceeding.
<PAGE>
 
 
                                      35
 
 Section 6.10. Priorities.
 
 If the Trustee collects any money or property pursuant to this Article 6 with
respect to Securities of a Series, it shall pay out the money or property in
the following order:
 
   First: to the Trustee for amounts due under Section 7.07;
 
   Second: to Holders for amounts due and unpaid on the Securities of such
  Series in respect of which monies have been collected for principal and
  interest, ratably, without preference or priority of any kind, according
  to the amounts due and payable on such Securities for principal and inter-
  est, respectively; and
 
   Third: to the Company.
 
 The Trustee, upon prior written notice to the Company, may fix a record date
and payment date for any payment to Securityholders pursuant to this Section
6.10.
 
 Section 6.11. Undertaking for Costs.
 
 In any suit for the enforcement of any right or remedy under this Indenture
or in any suit against the Trustee for any action taken or omitted by it as
Trustee, a court in its discretion may require the filing by any party liti-
gant in the suit of an undertaking to pay the costs of the suit, and the court
in its discretion may assess reasonable costs, including reasonable attorneys'
fees, against any party litigant in the suit, having due regard to the merits
and good faith of the claims or defenses made by the party litigant. This Sec-
tion 6.11 does not apply to a suit by the Trustee, a suit by a Holder pursuant
to Section 6.07, or a suit by any Holder or a group of Holders of more than
10% in principal amount of the outstanding Securities of all Series (or, if
the matter in issue does not relate to all Series of Securities, then the
Holders of 10% in principal amount of the outstanding Securities of all Series
to which such issue relates) (treated as a single class).
 
                                   ARTICLE 7
 
                                    Trustee
 
 Section 7.01. Duties of Trustee.
 
 (a) The Trustee, except during the continuance of an Event of Default known
to it pursuant to Section 6.01, undertakes to perform such duties and only
such duties as are specifically set forth in this Indenture. If an Event of
Default known to the Trustee pursuant to Section 6.01 has occurred and is con-
tinuing, the Trustee shall exercise such of the rights and powers vested in it
by this Indenture
<PAGE>
 
 
                                      36
and use the same degree of care and skill in their exercise as a prudent per-
son would exercise or use under the circumstances in the conduct of his own
affairs.
 
 (b) Except during the continuance of an Event of Default known to the Trustee
pursuant to Section 6.01:
 
   (1) the Trustee need perform only those duties as are specifically set
  forth in this Indenture and no others and no implied covenants or obliga-
  tions shall be read into this Indenture against the Trustee;
 
   (2) in the absence of bad faith on its part, the Trustee may conclusively
  rely, as to the truth of the statements and the correctness of the opin-
  ions expressed therein, upon certificates or opinions furnished to the
  Trustee and conforming to the requirements of this Indenture, however, the
  Trustee shall examine the certificates and opinions to determine whether
  or not they conform to the requirements of this Indenture.
 
 (c) The Trustee may not be relieved from liability for its own negligent ac-
tion, its own negligent failure to act, or its own willful misconduct, except
that:
 
   (1) this paragraph does not limit the effect of paragraphs (a) and (b) of
  this Section 7.01;
 
   (2) the Trustee shall not be liable for any error of judgment made in
  good faith by a Trust Officer, unless it is proved that the Trustee was
  negligent in ascertaining the pertinent facts;
 
   (3) the Trustee shall not be liable with respect to any action it takes
  or omits to take in good faith in accordance with a direction received by
  it pursuant to Section 6.05.
 
 (d) No provision of this Indenture shall require the Trustee to expend or
risk its own funds or otherwise incur any financial liability in the perfor-
mance of any of its duties hereunder or in the exercise of any of its rights
or powers if it shall have reasonable grounds for believing that repayment of
such funds or adequate indemnity against such risk or liability is not reason-
ably assured to it.
 
 (e) Every provision of this Indenture that in any way relates to the Trustee
is subject to paragraphs (a), (b), (c) and (d) of this Section 7.01.
 
 (f) The Trustee shall not be liable for interest on any money received by it
except as the Trustee may agree with the Company in writing. Money held in
trust by the Trustee need not be segregated from other funds except to the ex-
tent required by law.
<PAGE>
 
 
                                      37
 
 Section 7.02. Rights of Trustee.
 
 Subject to Section 7.01:
 
   (a) the Trustee may rely on any document believed by it to be genuine and
  to have been signed or presented by the proper person; the Trustee need
  not investigate any fact or matter stated in the document;
 
   (b) before the Trustee acts or refrains from acting, it may require an
  Officers' Certificate or an Opinion of Counsel, which shall conform to
  Section 10.05; the Trustee shall not be liable for any action it takes or
  omits to take in good faith in reliance on such certificate or opinion;
 
   (c) the Trustee may act through its attorneys and agents and shall not be
  responsible for the misconduct or negligence of any agent appointed with
  due care;
 
   (d) the Trustee shall not be liable for any action it takes or omits to
  take in good faith which it reasonably believes to be authorized or within
  its rights or powers;
 
   (e) the Trustee may consult with counsel and the advice or opinion of
  such counsel as to matters of law shall be full and complete authorization
  and protection in respect of any action taken, omitted or suffered by it
  hereunder in good faith and in accordance with the advice or opinion of
  such counsel; and
 
   (f) 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 direc-
  tion of the Holders, including, without limitation, the duties, rights and
  powers specified in Section 6.02 hereof, unless such Holders have offered
  to the Trustee reasonable security or indemnity against the costs, ex-
  penses and liabilities which might be incurred by the Trustee in compli-
  ance with such request or action.
 
 Section 7.03. Individual Rights of Trustee.
 
 The Trustee in its individual or any other capacity may become the owner or
pledgee of Securities and may otherwise deal with the Company or its Affili-
ates with the same rights it would have if it were not Trustee. Any Agent may
do the same with like rights. However, the Trustee is subject to Sections 7.10
and 7.11.
 
 Section 7.04. Trustee's Disclaimer.
 
 The Trustee makes no representation as to the validity or adequacy of this
Indenture or the Securities of any Series, it shall not be accountable for the
recitals contained in this Indenture or for the Company's use of the proceeds
<PAGE>
 
 
                                      38
from the Securities of any Series, and it shall not be responsible for any
statement in the Securities of any Series, or in any prospectus used to sell
the Securities of any Series, other than its certificate of authentication.
 
 Section 7.05. Notice of Defaults.
 
 If a Default or Event of Default occurs and is continuing with respect of any
Series of Securities, and if it is actually known to the Trustee pursuant to
Section 6.01 hereof, the Trustee shall mail to each Holder of the Securities
of such Series notice of the Default or Event of Default within 75 days after
it occurs. Except in the case of a Default or Event of Default in payment of
principal of or interest on any Security or in the payment of any Sinking Fund
installment, the Trustee may withhold such notice if and so long as a commit-
tee of its Trust Officers in good faith determines that withholding the notice
is in the interest of Securityholders.
 
 Section 7.06. Reports by Trustee to Holders.
 
 The Trustee shall transmit to the Holder such reports concerning, among other
things, the Trustee and its action under this Indenture as may be required
pursuant to the TIA at the time and in compliance with TIA (S) 313(a). The
Trustee also shall comply with TIA (S) 313(b)(2) and 313(c).
 
 A copy of each such report at the time of its mailing to Securityholders
shall be filed with the SEC and each stock exchange, if any, on which the Se-
curities of any Series are listed.
 
 The Company shall notify the Trustee if the Securities of any Series become
listed on any stock exchange.
 
 Section 7.07. Compensation and Indemnity.
 
 The Company shall pay to the Trustee from time to time such compensation as
shall be agreed upon in writing by the Company and the Trustee. The Trustee's
compensation shall not be limited by any law on compensation of a trustee of
an express trust. The Company shall reimburse the Trustee upon request for all
reasonable disbursements, expenses and advances incurred or made by it. Such
expenses shall include the reasonable compensation, disbursements and expenses
of the Trustee's agents and counsel.
<PAGE>
 
 
                                      39
 
 The Company shall indemnify the Trustee for, and hold it harmless against,
any loss or liability incurred by it in connection with the administration of
this trust and its duties hereunder, including the reasonable expenses of de-
fending itself against any claim of liability arising hereunder. The Trustee
shall notify the Company promptly of any claim asserted against the Trustee
for which it may seek indemnity. The Company need not pay for any settlement
made without its written consent, which consent shall not be unreasonably
withheld. The Company need not reimburse any expense or indemnify against any
loss or liability incurred by the Trustee through negligence or bad faith.
 
 To secure the Company's payment obligations in this Section 7.07, the Trustee
shall have a lien prior to the Securities of each Series on all money or prop-
erty held or collected by the Trustee, in its capacity as Trustee, except
money or property held in trust to pay principal of or interest on particular
Securities.
 
 When the Trustee incurs expenses or renders services after an Event of De-
fault specified in Section 6.01(4) or (5) occurs, the expenses and the compen-
sation for the services are intended to constitute expenses of administration
under any Bankruptcy Law.
 
 Section 7.08. Replacement of Trustee.
 
 The Trustee may resign by so notifying the Company in writing. The Holders of
a majority in principal amount of the outstanding Securities of all Series
(voting as a single class) may remove the Trustee by so notifying the Trustee
in writing and may appoint a successor Trustee with the Company's consent.
Pursuant to a Company Order, the Company may remove the Trustee if:
 
   (1) the Trustee fails to comply with Section 7.10;
 
   (2) the Trustee is adjudged a bankrupt or an insolvent;
 
   (3) a receiver or other public officer takes charge of the Trustee or its
  property; or
 
   (4) the Trustee becomes incapable of acting.
 
 If the Trustee resigns or is removed or if a vacancy exists in the office of
Trustee for any reason, the Company shall promptly appoint a successor Trust-
ee. Within one year after the successor Trustee takes office, the Holders of a
majority in principal amount of the Securities of all Series (voting as a sin-
gle class) may appoint a successor Trustee to replace the successor Trustee
appointed by the Company.
<PAGE>
 
 
                                      40
 
 A successor Trustee shall deliver a written acceptance of its appointment to
the retiring Trustee and to the Company. Immediately after that, the retiring
Trustee shall transfer, after payment of all sums then owing to the Trustee
pursuant to Section 7.07, all property held by it as Trustee to the successor
Trustee, subject to the lien provided in Section 7.07, the resignation or re-
moval of the retiring Trustee shall become effective, and the successor
Trustee shall have all the rights, powers and duties of the Trustee under this
Indenture. A successor Trustee shall mail notice of its succession to each
Securityholder.
 
 If a successor Trustee does not take office within 60 days after the retiring
Trustee resigns or is removed, the retiring Trustee, the Company or the Hold-
ers of at least 10% in principal amount of the outstanding Securities of all
Series (voting as a single class) may petition any court of competent juris-
diction for the appointment of a successor Trustee.
 
 If the Trustee fails to comply with Section 7.10, any Securityholder may pe-
tition any court of competent jurisdiction for the removal of the Trustee and
the appointment of a successor Trustee. Any successor Trustee shall comply
with TIA (S) 310(a)(5).
 
 Notwithstanding replacement of the Trustee pursuant to this Section 7.08, the
Company's obligations under Section 7.07 shall continue for the benefit of the
retiring Trustee.
 
 Section 7.09. Successor Trustee by Merger, etc.
 
 If the Trustee consolidates with, merges or converts into, or transfers all
or substantially all of its corporate trust business to, another corporation,
the resulting, surviving or transferee corporation without any further act
shall be the successor Trustee.
 
 Section 7.10. Eligibility; Disqualification.
 
 This Indenture shall always have a Trustee who satisfies the requirements of
TIA (S) 310(a)(1). The Trustee shall have combined capital and surplus of at
least $50,000,000 as set forth in its most recent published annual report of
condition. The Trustee shall comply with TIA (S) 310(b), including the provi-
sion permitted by the second sentence of TIA (S) 310(b).
<PAGE>
 
 
                                      41
 
 Section 7.11. Preferential Collection of Claims Against Company.
 
 The Trustee shall comply with TIA (S) 311(a), excluding from the operation of
311(a) any creditor relationship listed in TIA (S) 311(b). A Trustee who has
resigned or been removed shall be subject to TIA (S) 311(a) to the extent in-
dicated.
 
                                   ARTICLE 8
 
                            Discharge of Indenture
 
 Section 8.01. Termination of Company's Obligations.
 
 The Company may terminate its obligations under the Securities of any Series
and this Indenture with respect to such Series, except those obligations re-
ferred to in the immediately succeeding paragraph, (a) if all Securities of
such Series previously authenticated and delivered (other than destroyed, lost
or stolen Securities of such Series which have been replaced or paid or Secu-
rities of such Series for whose payment money or securities have theretofore
been held in trust and thereafter repaid to the Company, as provided in Sec-
tion 8.03) have been delivered to the Trustee for cancellation and the Company
has paid all sums payable by it hereunder, or (b) if, following the date on
which the Company shall have given notice to the Trustee of its intention to
defease all of the Securities of such Series, the Company has irrevocably de-
posited or caused to be deposited with the Trustee or a Paying Agent (other
than the Company or a Subsidiary), under the terms of an irrevocable trust
agreement in form and substance satisfactory to the Trustee and any such Pay-
ing Agent, as trust funds in trust solely for the benefit of the Holders for
that purpose (i) in the case of any Securities of any Series denominated in
United States dollars, an amount of cash sufficient to pay principal of and
interest on such outstanding Securities at their respective Stated Maturities,
or direct non-callable obligations of, or non-callable obligations guaranteed
by, the United States of America for the payment of which guarantee or obliga-
tion the full faith and credit of the United States is pledged, including but
not limited to depository receipts issued by a bank as custodian with respect
to any such security held by the custodian for the benefit of the holder of
such depository receipt ("U.S. Government Obligations"), maturing as to prin-
cipal and interest in such amounts and at such times as are sufficient without
consideration of any reinvestment of such interest, to pay principal of and
interest on such outstanding Securities at their respective Stated Maturities
and (ii) in the case of any Securities of any Series denominated in any cur-
rency other than United States dollars, an amount of the Required Currency
sufficient to pay principal of
<PAGE>
 
 
                                      42
and interest on such outstanding Securities at their respective Stated maturi-
ties; provided that the Trustee or such Paying Agent shall have been irrevoca-
bly instructed to apply such cash, the proceeds of such U.S. Government Obli-
gations or the Required Currency, as the case may be, to the payment of said
principal and interest with respect to the Securities of such Series; and pro-
vided, further, that if such irrevocable deposit in trust with the Trustee of
cash, U.S. Government Obligations or the Required Currency, as the case may
be, is made on or prior to one year from the Stated Maturity for payment of
principal of the Securities of the applicable Series, the Company shall have
delivered to the Trustee either an Opinion of Counsel with no material quali-
fications in form and substance satisfactory to the Trustee to the effect that
Holders of such Securities (i) will not recognize income, gain or loss for
Federal income tax purposes as a result of such deposit (and the defeasance
contemplated in connection therewith) and (ii) will be subject to Federal in-
come tax on the same amounts and in the same manner and at the same times as
would have been the case if such deposit and defeasance had not occurred, or
an applicable favorable ruling to that effect received from or published by
the Internal Revenue Service.
 
 Notwithstanding the foregoing paragraph, the Company's obligations in Sec-
tions 2.04, 2.05, 2.06, 2.07, 2.08, 4.01, 4.02, 7.07, 7.08, 8.03, 8.04 and Ar-
ticle 11 and except as otherwise provided in the Authorizing Resolution and/or
the supplemental indenture (if any) in respect of any Series, shall survive
until the Securities are no longer outstanding. Thereafter, the Company's ob-
ligations in Sections 7.07, 8.03 and 8.04 shall survive.
 
 After any such irrevocable deposit the Trustee upon request shall acknowledge
in writing the discharge of the Company's obligations under the Securities of
the applicable Series and this Indenture with respect to such Series except
for those surviving obligations specified above.
 
 Section 8.02. Application of Trust Money.
 
 The Trustee or Paying Agent shall hold in trust cash, U.S. Government Obliga-
tions or the Required Currency, as the case may be, deposited with it pursuant
to Section 8.01, and shall apply the deposited cash, the money from U.S. Gov-
ernment Obligations or the Required Currency, as the case may be, in accor-
dance with this Indenture to the payment of principal of and interest on the
Securities.
<PAGE>
 
 
                                      43
 
 Section 8.03. Repayment to Company.
 
 Subject to Section 8.01, the Trustee and the Paying Agent shall promptly pay
to the Company upon request any excess money held by them at any time. Subject
to the provisions of applicable law, the Trustee and the Paying Agent shall
pay to the Company upon request any money held by them for the payment of
principal or interest that remains unclaimed for two years, provided, however,
the Trustee or such Paying Agent before being required to make any payment may
at the expense of the Company cause to be published once in a newspaper of
general circulation in The City of New York or mail to each Holder entitled to
such money notice that such money remains unclaimed and that, after a date
specified therein which shall be at least 30 days from the date of such publi-
cation or mailing, any unclaimed balance of such money then remaining will be
repaid to the Company. After payment to the Company, the Trustee shall be re-
leased from all further liability with respect to such money and
Securityholders entitled to money must look to the Company for payment as gen-
eral creditors unless an applicable abandoned property law designates another
person.
 
 Section 8.04. Reinstatement.
 
 If the Trustee or Paying Agent is unable to apply any cash, U.S. Government
Obligations or the Required Currency, as the case may be, in accordance with
Section 8.01 by reason of any legal proceeding or by reason of any order or
judgment of any court or governmental authority enjoining, restraining or oth-
erwise prohibiting such application, the Company's obligations under this In-
denture (with respect to the applicable Series) and the Securities of the ap-
plicable Series shall be revived and reinstated as though no deposit had oc-
curred pursuant to Section 8.01 until such time as the Trustee or Paying Agent
is permitted to apply all such cash, U.S. Government Obligations and Required
Currency, as the case may be, in accordance with Section 8.01; provided, how-
ever, that if the Company has made any payment of interest on or principal of
any Securities of any Series because of the reinstatement of its obligations,
the Company shall be subrogated to the rights of the Holders of such Securi-
ties to receive such payment from the cash, U.S. Government Obligations or the
Required Currency, as the case may be, held by the Trustee or Paying Agent.
 
 Section 8.05. Indemnity for U.S. Government Obligations.
 
 The Company shall pay, and shall indemnify the Trustee against, any tax, fee
or other charge imposed on or assessed against U.S. Government Obligations
<PAGE>
 
 
                                      44
deposited pursuant to Section 8.01 or the principal and interest received on
such U.S. Government Obligations.
 
                                   ARTICLE 9
 
                      Amendments, Supplements and Waivers
 
 Section 9.01. Without Consent of Holders.
 
 The Company, when authorized by a Board Resolution, and the Trustee may amend
or supplement this Indenture or the Securities of any Series without notice to
or consent of any Securityholder:
 
   (1) to cure any ambiguity, defect or inconsistency;
 
   (2) to comply with Article 5;
 
   (3) to provide for uncertificated Securities in addition to certificated
  Securities;
 
   (4) to make any change that does not adversely affect the rights of any
  Securityholder of such Series;
 
   (5) to provide for the issuance and the terms of any particular Series of
  Securities, the rights and obligations of the Company and the Holders of
  Securities of such Series, the form or forms of the Securities of such Se-
  ries and such other matters in connection therewith as the Board of Direc-
  tors of the Company shall consider appropriate, including, without limita-
  tion, provisions for (a) additional or different covenants, restrictions
  or conditions applicable to such Series, (b) additional or different
  Events of Default in respect of such Series, (c) a longer or shorter pe-
  riod of grace and/or notice in respect of any provision applicable to such
  Series than is provided in Section 6.01, (d) immediate enforcement of any
  Event of Default in respect of such Series or (e) limitations upon the
  remedies available in respect of any Events of Default in respect of such
  Series or upon the rights of the holders of Securities of such Series to
  waive any such Event of Default; provided, that this paragraph (5) shall
  not be deemed to require the execution of a supplemental indenture to pro-
  vide for the issuance of any Series of Securities unless the same shall be
  provided for in the Authorizing Resolution relating thereto; or
 
   (6) to provide for a separate Trustee for one or more Series.
 
 Section 9.02. With Consent of Holders.
 
 Subject to Section 6.07, with the written consent of the Holders of at least
a majority in principal amount of the outstanding Securities of all Series af-
fected
<PAGE>
 
 
                                      45
thereby (voting as a single class), the Company, when authorized by a Board
Resolution, and the Trustee may amend or supplement this Indenture or such Se-
curities without notice to any Securityholder. Subject to Section 6.07, the
Holders of a majority in principal amount of the outstanding Securities of all
Series affected thereby (voting as a single class) may waive compliance by the
Company with any provision of this Indenture or such Securities without notice
to any Securityholder; provided, that, only the holders of a majority in prin-
cipal amount of Securities of a particular Series may waive compliance with a
provision of this Indenture or the Securities of such Series having applica-
bility solely to such Series. However, without the consent of each
Securityholder affected, an amendment, supplement or waiver, including a
waiver pursuant to Section 6.04, may not:
 
   (1) reduce the amount of Securities of such Series or all Series (voting
  as a single class), as the case may be, whose Holders must consent to an
  amendment, supplement or waiver;
 
   (2) reduce the rate or change the Stated Maturity for payment of interest
  on any Security;
 
   (3) reduce the principal or any premium payable upon the redemption of or
  change the Stated Maturity of any Security;
 
   (4) waive a Default in the payment of the principal of or interest on any
  Security;
 
   (5) make any changes in Section 6.04, 6.07 or the third sentence of this
  Section 9.02;
 
   (6) make any Security payable in money other than that stated in the Se-
  curity; or
 
   (7) adversely affect the right to convert the Securities into Common
  Stock in accordance herewith.
 
 A supplemental indenture which changes or eliminates any covenant or other
provision of this Indenture which has expressly been included solely for the
benefit of one or more particular Series of Securities, or which modifies the
rights of the Holders of Securities of such Series with respect to such cove-
nant or other provision, shall be deemed not to affect the rights under the
Indenture of the Holders of Securities of any other Series.
 
 It shall not be necessary for the consent of the Holders under this Section
to approve the particular form of any proposed amendment, supplement or waiv-
er, but it shall be sufficient if such consent approves the substance thereof.
<PAGE>
 
 
                                      46
 
 After an amendment, supplement or waiver under this Section becomes effec-
tive, the Company shall mail to the Holders affected thereby a notice briefly
describing the amendment, supplement or waiver. 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.
 
 Section 9.03. Compliance with Trust Indenture Act.
 
 Every amendment to or supplement of this Indenture or the Securities shall
comply with the TIA as then in effect.
 
 Section 9.04. Revocation and Effect of Consents.
 
 Until an amendment or waiver becomes effective, a consent to it by a Holder
is a continuing consent by the Holder and every subsequent Holder of such Se-
curity or portion of such Security that evidences the same debt as the con-
senting Holder's Security, even if notation of the consent is not made on any
Security. However, any such Holder or subsequent Holder may revoke in writing
the consent as to his Security or portion of a Security. Such revocation shall
be effective only if the Trustee receives the written notice of revocation be-
fore the date the amendment, supplement or waiver becomes effective.
 
 The Company may, but shall not be obligated to, fix a record date for the
purpose of determining the Holders entitled to consent to any amendment, sup-
plement or waiver which shall be at least 30 days prior to the first solicita-
tion of such consent. If a record date is fixed, then notwithstanding the last
two sentences of the immediately preceding paragraph, those persons who were
Holders at such record date (or their duly designated proxies), and only those
persons, shall be entitled to consent to such amendment, supplement or waiver
or to revoke any consent previously given, whether or not such persons con-
tinue to be Holders after such record date. No such consent shall be valid or
effective for more than 90 days after such record date.
 
 After an amendment, supplement or waiver becomes effective, it shall bind ev-
ery Holder of a Security of such Series, unless it makes a change described in
any of clauses (1) through (7) of Section 9.02. In that case the amendment,
supplement or waiver shall bind each Holder of a Security who has consented to
it and every subsequent Holder of a Security or portion of a Security of the
same Series that evidences the same debt as the consenting Holder's Security.
<PAGE>
 
 
                                      47
 
 Section 9.05. Notation on or Exchange of Securities.
 
 If an amendment, supplement or waiver changes the terms of a Security, the
Trustee may require the Holder of the Security to deliver it to the Trustee.
The Trustee may place an appropriate notation on the Security about the
changed terms and return it to the Holder. Alternatively, if the Company or
the Trustee so determines, the Company in exchange for the Security shall is-
sue and the Trustee shall authenticate a new Security of the same Series that
reflects the changed terms.
 
 Section 9.06. Trustee to Sign Amendments, etc.
 
 The Trustee shall be entitled to receive, and shall be fully protected in re-
lying upon, an Officers' Certificate and an Opinion of Counsel stating that
the execution of any amendment, supplement or waiver authorized pursuant to
this Article 9 is authorized or permitted by this Indenture. The Trustee may,
but shall not be obligated to, execute any such amendment, supplement or
waiver which affects the Trustee's own rights, duties or immunities under this
Indenture or otherwise.
 
 Section 9.07. Subordination Unimpaired.
 
 This Indenture may not be amended to alter the subordination of any Security
without the written consent of each holder of Senior Indebtedness then out-
standing that would be adversely affected thereby.
 
                                  ARTICLE 10
 
                                 Miscellaneous
 
 Section 10.01  Trust Indenture Act Controls.
 
 If any provision of this Indenture limits, qualifies, or conflicts with an-
other provision which is required to be included in this Indenture by the TIA,
the required provision shall control.
 
 Section 10.02  Notices.
 
 Any notice or communication shall be sufficiently given if in writing and de-
livered in person or mailed by first- class mail addressed as follows:
 
  if to the Company:
 
   The Coastal Corporation
   Coastal Tower
   Nine Greenway Plaza
   Houston, Texas 77046-0995
 
   Attention:  Director, Financial Administration
<PAGE>
 
 
                                      48
 
 if to the Trustee: Harris Trust and Savings Bank
                    c/o Bank of Montreal Trust Company
                    Wall Street Plaza
                    88 Pine Street
                    New York, New York 10005
                    Attention:
 
 The Company or the Trustee by notice to the other may designate additional or
different addresses for subsequent notices or communications.
 
 Any notice or communication mailed to a Securityholder shall be mailed to him
at his address as it appears on the Security Register and shall be suffi-
ciently given to him if so mailed within the time prescribed.
 
 Failure to mail a notice or communication to a Securityholder or any defect
in it shall not affect its sufficiency with respect to other Securityholders.
Except for a notice to the Trustee, which is deemed given only when received,
if a notice or communication is mailed in the manner provided above, it is
duly given, whether or not the addressee receives it.
 
 Section 10.03. Communications by Holders with Other Holders.
 
 Securityholders may communicate pursuant to TIA (S) 312(b) with other
Securityholders with respect to their rights under this Indenture or the Secu-
rities of an applicable Series. The Company, the Trustee, the Registrar and
any other person shall have the protection of TIA (S) 312(c).
 
 Section 10.04. Certificate and Opinion as to Conditions Precedent.
 
 Upon any request or application by the Company to the Trustee to take any ac-
tion under this Indenture, the Company shall furnish to the Trustee:
 
   (1) an Officers' Certificate stating that, in the opinion of the signers,
  all conditions precedent, if any, provided for in this Indenture relating
  to the proposed action have been complied with; and
 
 
   (2) an Opinion of Counsel stating that, in the opinion of such counsel,
  all such conditions precedent have been complied with.
 
 Section 10.05. Statements Required in Certificate or Opinion.
 
 Each certificate or opinion with respect to compliance with a condition or
covenant provided for in this Indenture shall include:
 
   (1) a statement that the person making such certificate or opinion has
  read such covenant or condition;
<PAGE>
 
 
                                      49
 
   (2) a brief statement as to the nature and scope of the examination or
  investigation upon which the statements or opinions contained in such cer-
  tificate or opinion are based;
 
   (3) a statement that, in the opinion of such person, he has made such ex-
  amination or investigation as is necessary to enable him to express an in-
  formed opinion as to whether or not such covenant or condition has been
  complied with; and
 
   (4) a statement as to whether or not, in the opinion of such person, such
  condition or covenant has been complied with; provided, however, that with
  respect to matters of fact an Opinion of Counsel may rely on an Officers'
  Certificate or certificates of public officials.
 
 Section 10.06. Rules by Trustee, Paying Agent, Registrar.
 
 The Trustee may make reasonable rules for action by or at a meeting of
Securityholders. The Paying Agent or Registrar may make reasonable rules for
its functions.
 
 Section 10.07. Legal Holidays.
 
 A "Legal Holiday" is a Saturday, a Sunday or a day on which banking institu-
tions in New York, New York are not required to be open. If a payment date is
a Legal Holiday at a place of payment, payment may be made at the place on the
next succeeding day that is not a Legal Holiday, and no interest shall accrue
for the intervening period.
 
 Section 10.08. Governing Law.
 
 THE LAWS OF THE STATE OF NEW YORK SHALL GOVERN THIS INDENTURE AND THE SECURI-
TIES WITHOUT REGARD TO PRINCIPLES OF CONFLICTS OF LAW.
 
 Section 10.09. No Adverse Interpretation of Other Agreements.
 
 This Indenture may not be used to interpret another indenture, loan or debt
agreement of the Company or any of its Subsidiaries. Any such indenture, loan
or debt agreement may not be used to interpret this Indenture.
 
 Section 10.10. No Recourse Against Others.
 
 A director, officer, employee or stockholder, as such, of the Company shall
not have any liability for any obligations of the Company under the Securities
or the Indenture or for any claim based on, in respect of or by reason of such
obligations or their creation. Each Securityholder by accepting a Security
waives and releases all such liability.
<PAGE>
 
 
                                      50
 
 Section 10.11. Successors.
 
 All agreements of the Company in this Indenture and the Securities shall bind
its successor. All agreements of the Trustee in this Indenture shall bind its
successor.
 
 Section 10.12. Duplicate Originals.
 
 The parties may sign any number of copies of the Indenture. Each signed copy
shall be an original, but all of them together represent the same agreement.
 
 Section 10.13. Separability.
 
 In case any provision in this Indenture or in the Securities shall be inval-
id, illegal or unenforceable, the validity, legality and enforceability of the
remaining provisions shall not in any way be affected or impaired thereby, and
a Holder shall have no claim therefor against any party hereto.
 
 Section 10.14. Action of Holders When Securities Are Denominated in Different
                 Currencies.
 
 Whenever any action is to be taken hereunder by the Holders of two or more
Series of Securities denominated in different currencies, then, for the pur-
poses of determining the principal amount of Securities held by such Holders,
the aggregate principal amount of the Securities denominated in a currency
other than United States dollars shall be deemed to be that amount of United
States dollars that could be obtained for such principal amount on the basis
of the spot rate of exchange for such currency as determined by the Company or
by an authorized exchange rate agent and evidenced to the Trustee by an Offi-
cers' Certificate as of the date the taking of such action by the Holders of
the requisite percentage in principal amount of the Securities is evidenced to
the Trustee. An exchange rate agent may be authorized in advance or from time
to time by the Company, and may be the Trustee or its Affiliate. Any such de-
termination by the Company or by any such exchange rate agent shall be conclu-
sive and binding on all Holders and the Trustee, and neither the Company nor
such exchange rate agent shall be liable therefor in the absence of bad faith.
 
 Section 10.15. Monies of Different Currencies to be Segregated.
 
  The Trustee shall segregate monies, funds, and accounts held by the Trustee
hereunder in one currency from any monies, funds or accounts in any other cur-
rencies, notwithstanding any provision herein which would otherwise permit the
Trustee to commingle such amounts.
<PAGE>
 
 
                                      51
 
 Section 10.16. Payment to be in Proper Currency.
 
 Each reference in any Security, or in the Authorizing Resolution and/or sup-
plemental indenture, if any, relating thereto, to any currency shall be of the
essence. In the case of any Security denominated in any currency (the "Re-
quired Currency") other than United States dollars, except as otherwise pro-
vided therein or in the related Authorizing Resolution and/or supplemental in-
denture, if any, the obligation of the Company to make any payment of princi-
pal of or interest thereon shall not be discharged or satisfied by any tender
by the Company, or recovery by the Trustee, in any currency other than the Re-
quired Currency, except to the extent that such tender or recovery shall re-
sult in the Trustee timely holding the full amount of the Required Currency.
The costs and risks of any such exchange, including without limitations, the
risks of delay and exchange rate fluctuation, shall be borne by the Company;
the Company shall remain fully liable for any shortfall or delinquency in the
full amount of Required Currency then due and payable, and in no circumstances
shall the Trustee be liable therefor. The Company hereby waives any defense of
payment based upon any such tender or recovery which is not in the Required
Currency, or which, when exchanged for the Required Currency by the Trustee,
is less than the full amount of Required Currency then due and payable.
 
                                  ARTICLE 11
 
                           Conversion of Securities
 
 Section 11.01. Applicability of Article.
 
 The provisions of this Article shall be applicable to the Securities of any
Series which are convertible into Common Stock pursuant to the Authorizing
Resolution and/or Supple- mental Indenture (if any) by which the form and
terms of the Securities of such Series were established, as and to the extent
provided by the terms of the Securities of such Series.
 
 Section 11.02. Exercise of Conversion Privilege.
 
 In order to exercise the conversion privilege, the Holder of any Security to
be converted shall surrender such Security to the Conversion Agent at any time
during usual business hours at its office or agency maintained for the purpose
as provided in this Indenture, accompanied by a fully executed written notice,
in substantially the form set forth on the reverse of the Security, that the
Holder elects to convert such Security or a stated portion thereof constitut-
ing a multiple
<PAGE>
 
 
                                      52
of $1,000 in principal amount, and, if such Security is surrendered for con-
version during the period between the close of business on any Regular Record
Date for such Security and the opening of business on the related Interest
Payment Date and has not been called for redemption on a Redemption Date
within such period (or on such Interest Payment Date), accompanied also by
payment of an amount equal to the interest payable on such Interest Payment
Date on the portion of the principal amount of the Security being surrendered
for conversion. Such notice shall also state the name or names (and address)
in which the certificate or certificates of shares of Common Stock shall be
issued. Securities surrendered for conversion shall (if so required by the
Company or the Conversion Agent) be duly endorsed by, or be accompanied by a
written instrument or instruments of transfer in form satisfactory to the Com-
pany and the Conversion Agent duly executed by, the Holder or his attorney
duly authorized in writing. As promptly as practicable after the receipt of
such notice and the surrender of such Security as aforesaid, the Company
shall, subject to the provisions of Section 11.07, issue and deliver at such
office or agency to such Holder, or on his written order, a certificate or
certificates for the number of full shares of Common Stock issuable on conver-
sion of such Security in accordance with the provisions of such Security and
cash, as provided in Section 11.03, in respect of any fraction of a share of
Common Stock otherwise issuable upon such conversion. Such conversion shall be
at the Conversion Price in effect, and shall be deemed to have been effected,
immediately prior to the close of business on the date (herein called the
"Date of Conversion") on which such notice in proper form shall have been re-
ceived by the Conversion Agent and such Security shall have been surrendered
as aforesaid, and the person or persons in whose name or names any certificate
or certificates for shares of Common Stock shall be issuable upon such conver-
sion shall be deemed to have become on the Date of Conversion the holder or
holders of record of the shares represented thereby; provided, however, that
any such surrender on any date when the stock transfer books of the Company
shall be closed shall constitute the person or persons in whose name or names
the certificate or certificates for such shares are to be issued as the record
holder or holders thereof for all purposes at the opening of business on the
next succeeding day on which such stock transfer books are open but such con-
version shall nevertheless be at the Conversion Price in effect at the close
of business on the date when such Security shall have been so surrendered with
the conversion notice in proper form. In the case of conversion of a portion,
but less than all, of a Security, the Company shall execute, and the Trustee
shall authenticate and deliver to the Holder thereof, at the expense of the
Company, a Security or
<PAGE>
 
 
                                      53
Securities in the aggregate principal amount of the unconverted portion of the
Security surrendered. Except as otherwise expressly provided in this Inden-
ture, no payment or adjustment shall be made for interest accrued on any Secu-
rity (or portion thereof) converted or for dividends or distributions on any
Common Stock issued upon conversion of any Security. The right, if any, of a
Holder of any Security to cause the Company to redeem, purchase or repay such
Security shall terminate upon receipt by the Company of any notice of conver-
sion of such Security.
 
 Section 11.03. Fractional Interests.
 
 No fractions of shares or scrip representing fractions of shares shall be is-
sued upon conversion of Securities. If more than one Security shall be surren-
dered for conversion at one time by the same Holder, the number of full shares
which shall be issuable upon conversion thereof shall be computed on the basis
of the aggregate principal amount of the Securities so surrendered. If any
fraction of a share of Common Stock would, except for the provisions of this
Section 11.03, be issuable on the conversion of any Security or Securities,
the Company shall make payment in lieu thereof in cash equal to the value of
such fraction computed on the basis of the Last Sale Price of one share of
Common Stock on the most recent Trading Day prior to the Date of Conversion.
"Last Sale Price" on any Trading Day shall mean (i) the closing price regular
way (or, if no closing price is reported, the average of the bid and asked
prices) as reported on the New York Stock Exchange Composite Tape, or (ii) if
on such Trading Day the Common Stock is not listed or admitted to trading on
such exchange, the closing price regular way (or, if no closing price is re-
ported, the average of the bid and asked prices) on the principal national se-
curities exchange on which the Common stock is listed or admitted to trading,
or (iii) if not listed or admitted to trading on any national securities ex-
change on such Trading Day, then the average of the closing bid and asked
prices as reported through the National Association of Securities Dealers,
Inc. on its Nasdaq National Market System or Nasdaq System or a similar organ-
ization if Nasdaq is no longer reporting information, or (iv) if the Common
Stock is not listed or admitted to trading on any national securities exchange
or quoted on the Nasdaq National Market System or Nasdaq System on such Trad-
ing Day, then the average of the closing bid and asked prices in the over-the-
counter market as furnished by any New York Stock Exchange member firm se-
lected from time to time by the Company for that purpose or (v) if not quoted
by any such organization on such Trading Day, the fair value of such Common
Stock on such Trading Day, as determined by the Board of Directors.
<PAGE>
 
 
                                      54
The term "Trading Day" shall mean each Monday, Tuesday, Wednesday, Thursday
and Friday, other than any day on which securities are not traded on any of
the above mentioned exchanges or in such markets.
 
 Section 11.04. Adjustment of Conversion Price.
 
 The conversion price or rate (herein called the "Conversion Price") for the
Securities of any Series shall be as set forth in the Authorizing Resolution
and/or supplemental indenture (if any) pursuant to which the form and terms of
the Securities of such Series were established, and, except as otherwise pro-
vided therein, shall be subject to adjustment from time to time as follows:
 
   (a) In case the Company shall (1) pay a dividend or make a distribution
  in shares of Common Stock on the Common Stock, (2) subdivide its outstand-
  ing shares of Common Stock into a greater number of shares, (3) combine
  its outstanding shares of Common Stock into a smaller number of shares or
  (4) issue by reclassification of its Common Stock any shares of Capital
  Stock of the Company, the Conversion Price in effect immediately prior to
  such action shall be adjusted so that the Holder of any Security thereaf-
  ter surrendered for conversion shall be entitled to receive the number of
  shares of Common Stock or other Capital Stock of the Company which such
  Holder would have owned immediately following such action had such Secu-
  rity been converted immediately prior thereto. An adjustment made pursuant
  to this subsection (a) shall become effective immediately, except as pro-
  vided in subsection (e) below, after the record date in the case of a div-
  idend or distribution and shall become effective immediately after the ef-
  fective date in the case of a subdivision, combination or reclassifica-
  tion. If, as a result of an adjustment made pursuant to this subsection
  (a), the Holder of any Security thereafter surrendered for conversion
  shall become entitled to receive shares of two or more classes of Capital
  Stock (including shares of Common Stock and other Capital Stock) of the
  Company, the Board of Directors (whose determination shall be conclusive
  and shall be described in a statement filed with the Trustee) shall deter-
  mine the allocation of the adjusted Conversion Price between or among
  shares of such classes of Capital Stock or shares of Common Stock and
  other Capital Stock.
 
   (b) In case the Company shall issue rights or warrants to all holders of
  Common Stock entitling them (for a period not exceeding 45 days from the
  date of such issuance) to subscribe for or purchase shares of Common Stock
  at a price per share less than the current market price per share (as de-
  termined pursuant to subsection (d) below) of the Common Stock on the rec-
  ord date mentioned below, the Conversion Price shall be adjusted to a
  price,
<PAGE>
 
 
                                      55
  computed to the nearest cent, so that the same shall equal the price de-
  termined by multiplying:
 
     (1) the Conversion Price in effect immediately prior to the date of
    issuance of such rights or warrants by a fraction, of which
 
     (2) the numerator shall be (A) the number of shares of Common Stock
    outstanding on the date of issuance of such rights or warrants, imme-
    diately prior to such issuance, plus (B) the number of shares which
    the aggregate offering price of the total number of shares so offered
    for subscription or purchase would purchase at such current market
    price (determined by multiplying such total number of shares by the
    exercise price of such rights or warrants and dividing the product so
    obtained by such current market price), and of which
 
     (3) the denominator shall be (A) the number of shares of Common Stock
    outstanding on the date of issuance of such rights or warrants, imme-
    diately prior to such issuance, plus (B) the number of additional
    shares of Common Stock which are so offered for subscription or pur-
    chase.
 
  Such adjustment shall become effective immediately, except as provided in
  subsection (e) below, after the record date for the determination of hold-
  ers entitled to receive such rights or warrants.
 
   (c) In case the Company shall distribute to substantially all holders of
  Common Stock, evidences of indebtedness, equity securities (including eq-
  uity interests in the Company's Subsidiaries) other than Common Stock, or
  other assets (other than cash dividends paid out of surplus of the Compa-
  ny), or shall distribute to substantially all holders of Common Stock
  rights or warrants to subscribe for securities (other than those referred
  to in subsection (b) above) then in each such case the Conversion Price
  shall be adjusted so that the same shall equal the price determined by
  multiplying the Conversion Price in effect immediately prior to the date
  of such distribution by a fraction of which the numerator shall be the
  current market price per share (determined as provided in subsection (d)
  below) of the Common Stock on the record date mentioned below less the
  then fair market value as determined by the Board of Directors (whose de-
  termination shall, if made in good faith, be conclusive evidence of such
  fair market value) of the portion of the assets so distributed or of such
  subscription rights or warrants applicable to one share of Common Stock,
  and of which the denominator shall be such current market price per share
  of the Common Stock. Such adjustment shall become effective immediately,
  except as provided in subsection (e) below, after the record date for the
  determination of stockholders entitled to receive such distribution.
<PAGE>
 
 
                                      56
 
   (d) For the purpose of any computation under subsections (b) and (c)
  above, the current market price per share of Common Stock on any date
  shall be deemed to be the average of the Last Sale Prices for the 30 con-
  secutive Trading Days commencing 45 Trading Days before the date in ques-
  tion.
 
   (e) In any case in which this Section 11.4 shall require that an adjust-
  ment be made immediately following a record date, the Company may elect to
  defer the effectiveness of such adjustment (but in no event until a date
  later than the effective time of the event giving rise to such adjust-
  ment), in which case the Company shall, with respect to any Security con-
  verted after such record date and before such adjustment shall have become
  effective, (i) defer paying any cash payment pursuant to Section 11.03 or
  issuing to the Holder of such Security the number of shares of Common
  Stock and other Capital Stock of the Company issuable upon such conversion
  in excess of the number of shares of Common Stock and other Capital Stock
  of the Company issuable thereupon only on the basis of the Conversion
  Price prior to adjustment, and (ii) not later than five Business Days af-
  ter such adjustment shall have become effective, pay to such Holder the
  appropriate cash payment pursuant to Section 11.03 and issue to such
  Holder the additional shares of Common Stock and other Capital Stock of
  the Company issuable on such conversion.
 
   (f) No adjustment in the Conversion Price shall be required unless such
  adjustment would require an increase or decrease of at least 1% of the
  Conversion Price; provided that any adjustments which by reason of this
  subsection (f) are not required to be made shall be carried forward and
  taken into account in any subsequent adjustment; provided, further, that
  adjustment shall be required and made in accordance with the provisions of
  this Article 11 (other than this subsection (f)) not later than such time
  as may be required in order to preserve the tax-free nature of a distribu-
  tion to the holders of Securities or Common Stock. All calculations under
  this Article 11 shall be made to the nearest cent or to the nearest one-
  hundredth of a share, as the case may be.
 
   (g) Whenever the Conversion Price is adjusted as herein provided, the
  Company shall promptly (i) file with the Trustee and each Conversion Agent
  an Officer's Certificate setting forth the Conversion Price after such ad-
  justment and setting forth a brief statement of the facts requiring such
  adjustment, which certificate shall be conclusive evidence of the correct-
  ness of such adjustment, and (ii) mail or cause to be mailed a notice of
  such adjustment to each Holder of Securities in the manner provided in
  Section 10.02.
 
Anything in this Section 11.04 to the contrary notwithstanding, the Company
shall be entitled to make such reductions in the Conversion Price, in addition
to
<PAGE>
 
 
                                      57
those required by this Section 11.04, as it in its discretion shall determine
to be advisable in order that any stock dividend, subdivision of shares, dis-
tribution of rights or warrants to purchase stock or securities, or distribu-
tion of other assets (other than cash dividends) hereafter made by the Company
to its stockholders shall not be taxable.
 
 Section 11.05. Continuation of Conversion Privilege in Case of Merger, Con-
                 solidation or Sale of Assets.
 
 If any of the following shall occur, namely: (a) any consolidation or merger
of the Company as a result of which the holders of Common Stock shall be enti-
tled to receive stock, other securities or other assets (including cash) with
respect to or in exchange for Common Stock; or (b) any sale, lease, exchange
or other disposition of all or substantially all of the property and assets of
the Company as an entirety, then the Company, or such successor or purchasing
corporation, as the case may be, shall, as a condition precedent to such con-
solidation, merger, sale, lease, exchange or other disposition, execute and
deliver to the Trustee a supplemental indenture (which shall conform to the
TIA as in force at the date of the execution thereof) providing that the
Holder of each convertible Security then outstanding shall have the right to
convert such Security into the kind and amount of shares of stock and other
securities and property (including cash) receivable upon or in connection with
such consolidation, merger, sale, lease, exchange or other disposition by a
holder of the number of shares of Common Stock issuable upon conversion of
such Security immediately prior to such consolidation, merger, sale, lease,
exchange or other disposition. Such supplemental indenture shall provide for
adjustments which shall be as nearly equivalent as may be practicable to the
adjustments provided for in this Article 11. If, in the case of any such con-
solidation, merger, sale, lease, exchange or other disposition, the stock or
other securities and property (including cash) receivable thereupon or in con-
nection therewith by a holder of shares of Common Stock includes shares of
stock or other securities and property (including cash) of a corporation other
than the successor or purchasing corporation, as the case may be, in such con-
solidation, merger, sale, lease, exchange or other disposition, then such sup-
plemental indenture shall also be executed by such other corporation and shall
contain such additional provisions to protect the interests of the Holders of
the Securities as the Board of Directors shall reasonably consider necessary
by reason of the foregoing. The provisions of this Section 11.05 shall simi-
larly apply to successive consolidations, mergers, sales, leases, exchanges or
other dispositions.
<PAGE>
 
 
                                      58
 
 Notice of the execution of each such supplemental indenture shall be mailed
to each Holder of Securities in the manner provided in Section 10.02.
 
 Neither the Trustee nor any Conversion Agent shall be under any responsibil-
ity to determine the correctness of any provisions contained in any such sup-
plemental indenture relating either to the kind or amount of shares of stock
or securities or property (including cash) receivable by Holders of Securities
upon the conversion of their Securities after any such consolidation, merger,
sale, lease, exchange or other disposition or to any adjustment to be made
with respect thereto, but, subject to the provisions of Sections 7.01 and
7.02, may accept as conclusive evidence of the correctness of any such provi-
sions, and shall be protected in relying upon, the Officer's Certificate
(which the Company shall be obligated to file with the Trustee prior to the
execution of any such supplemental indenture) with respect thereto.
 
 Section 11.06. Notice of Certain Events.
 
 If:
 
   (a) the Company shall declare a dividend (or any other distribution) pay-
  able to the holders of Common Stock otherwise than in cash; or
 
   (b) the Company shall authorize the granting to all holders of Common
  Stock of rights to subscribe for or purchase any shares of stock of any
  class or of any other rights; or
 
   (c) the Company shall authorize any reclassification or change of the
  Common Stock (other than a subdivision or combination of its outstanding
  shares of Common Stock), or any consolidation or merger to which the Com-
  pany is a party and for which approval of any stockholders of the Company
  is required, or the sale, lease, exchange or other disposition of all or
  substantially all the property and assets of the Company; or
 
   (d) there shall be authorized or ordered any voluntary or involuntary
  dissolution, liquidation or winding-up of the Company;
 
then, the Company shall cause to be filed at the office or agency maintained
for the purpose of conversion of the Securities as provided in Section 4.02,
and shall cause to be mailed to each Holder of Securities, in the manner pro-
vided in Section 10.02, at least 20 days before the date hereinafter specified
(or the earlier of the dates hereinafter specified, in the event that more
than one date is specified), a notice stating the date on which (1) a record
is expected to be taken for the purpose of such dividend, distribution or
rights, or if a record is not to be taken, the date as of which the holders of
Common Stock of record to be entitled
<PAGE>
 
 
                                      59
to such dividend, distribution or rights are to be determined, or (2) such re-
classification, change, consolidation, merger, sale, lease, exchange or other
disposition, dissolution, liquidation or winding-up is expected to become ef-
fective and the date, if any is to be fixed, as of which it is expected that
holders of Common Stock of record shall be entitled to exchange their shares
of Common Stock for securities or other property deliverable upon such reclas-
sification, change, consolidation, merger, sale, lease, exchange or other dis-
position, dissolution, liquidation or winding-up.
 
 Section 11.07. Taxes on Conversion.
 
 The Company will pay any and all documentary, stamp or similar taxes payable
to the United States of America or any political subdivision or taxing author-
ity thereof or therein in respect of the issue or delivery of shares of Common
Stock on conversion of Securities pursuant thereto; provided, however, that
the Company shall not be required to pay any tax which may be payable in re-
spect of any transfer involved in the issue or delivery of shares of Common
Stock in a name other than that of the Holder of the Securities to be con-
verted (or payment of cash in lieu thereof to a person other than such Holder)
and no such issue or delivery (or payment) shall be made unless and until the
person requesting such issue or delivery (or payment) has paid to the Company
the amount of any such tax or has established, to the satisfaction of the Com-
pany, that such tax has been paid. The Company extends no protection with re-
spect to any other taxes imposed in connection with conversion of Securities.
 
 Section 11.08. Company to Provide Stock.
 
 The Company shall reserve, free from preemptive rights, out of its authorized
but unissued shares, sufficient shares to provide for the conversion of con-
vertible Securities from time to time as such Securities are presented for
conversion; provided, however, that nothing contained herein shall be con-
strued to preclude the Company from satisfying its obligations in respect of
the conversion of Securities by delivery of repurchased shares of Common Stock
which are held in the treasury of the Company.
 
 If any shares of Common Stock to be reserved for the purpose of conversion of
Securities hereunder require registration with or approval of any governmental
authority under any Federal or state law before such shares may be validly is-
sued or delivered upon conversion, then the Company covenants that it will in
good faith and as expeditiously as possible endeavor to secure such registra-
tion or
<PAGE>
 
 
                                      60
approval, as the case may be; provided, however, that nothing in this Section
11.08 shall be deemed to affect in any way the obligations of the Company to
convert Securities into Common Stock as provided in this Article 11.
 
 Before taking any action which would cause an adjustment reducing the Conver-
sion Price below the then par value, if any, of the Common Stock, the Company
will take all corporate action which may, in the opinion of counsel, be neces-
sary in order that the Company may validly and legally issue fully paid and
non-assessable shares of Common Stock at such adjusted Conversion Price.
 
 The Company covenants that all shares of Common Stock which may be issued
upon conversion of Securities will upon issue be fully paid and non-assessa-
ble by the Company and free of preemptive rights.
 
 Section 11.09.  Disclaimer of Responsibility for Certain Matters.
 
 Neither the Trustee, any Conversion Agent nor any agent of either shall at
any time be under any duty or responsibility to any Holder of Securities to
determine whether any facts exist which may require any adjustment of the Con-
version Price or with respect to the Officer's Certificate referred to in Sec-
tion 11.04(g), or with respect to the nature or extent of any such adjustment
when made, or with respect to the method employed, or herein or in any supple-
mental indenture provided to be employed, in making the same. Neither the
Trustee, any Conversion Agent nor any agent of either shall be accountable
with respect to the validity or value (or the kind or amount) of any shares of
Common Stock, or of any securities or property (including cash), which may at
any time be issued or delivered upon the conversion of any Security; and nei-
ther the Trustee, any Conversion Agent nor any agent of either makes any rep-
resentation with respect thereto. Neither the Trustee, any Conversion Agent
nor any agent of either shall be responsible for any failure of the Company to
issue, register the transfer of or deliver any shares of Common Stock or stock
certificates or other securities or property (including cash) upon the surren-
der of any Security for the purpose of conversion or, subject to Section 7.01
and 7.02, to comply with any of the covenants of the Company contained in this
Article 11.
<PAGE>
 
 
                                      61
 
 Section 11.10.  Return of Funds Deposited for Redemption of Converted Securi-
                 ties.
 
 Any funds which at any time shall have been deposited by the Company or on
its behalf with the Trustee or any Paying Agent for the purpose of paying the
principal of and interest, if any, on any of the Securities and which shall
not be required for such purposes because of the conversion of such Securi-
ties, as provided in this Indenture, shall forthwith after such conversion be
repaid to the Company by the Trustee or such Paying Agent.
 
                                  ARTICLE 12
 
                                 Subordination
 
 Section 12.01.  Securities Subordinated to Senior Indebtedness.
 
 The Company covenants and agrees that anything in this Indenture or the Secu-
rities of any Series to the contrary notwithstanding, the indebtedness evi-
denced by the Securities of each Series is subordinate and junior in right of
payment to all Senior Indebtedness to the extent provided herein, and each
Holder of Securities of each Series, by such Holder's acceptance thereof,
likewise covenants and agrees to the subordination herein provided and shall
be bound by the provisions hereof.
 
 If any default occurs and is continuing in the payment when due, whether at
maturity, upon any redemption, by declaration or otherwise, of any principal
of, interest on, unpaid drawings for letters of credit issued in respect of,
or regularly accruing fees with respect to, any Senior Indebtedness, no pay-
ment of any kind or character shall be made by or on behalf of the Company or
any other person on its or their behalf with respect to any principal of, in-
terest on or other amounts owing in respect of the Securities or to acquire
any of the Securities for cash, property or otherwise. In addition, if any
other event of default occurs and is continuing with respect to any Senior In-
debtedness, as such event of default is defined in the instrument creating or
evidencing such Senior Indebtedness, permitting the holders of such Senior In-
debtedness then outstanding to accelerate the maturity thereof and if the
holder or holders of such Senior Indebtedness or the trustee or agent acting
on behalf of such Senior Indebtedness (each such person a "Representative")
gives written notice of the event of default to the Trustee (a "Default No-
tice"), then, unless and until all events of default have been cured or waived
or have ceased to exist or the Trustee receives notice from
<PAGE>
 
 
                                      62
the Representative for the respective issue of Senior Indebtedness terminating
the Blockage Period (as defined below), during the 180 days after the delivery
of such Default Notice (the "Blockage Period"), neither the Company nor any
other person on its behalf shall (x) make any payment of any kind or character
with respect to any principal of, interest on or other amounts owing in re-
spect of the Securities or (y) acquire any of the Securities for cash, prop-
erty or otherwise. Notwithstanding anything herein to the contrary, in no
event will a Blockage Period extend beyond 180 days from the date the payment
on the Securities was due and only one such Blockage Period may be commenced
within any 360 consecutive days. No event of default which existed or was con-
tinuing on the date of the commencement of any Blockage Period with respect to
the Senior Indebtedness shall be, or be made, the basis for commencement of a
second Blockage Period by the Representative of such Senior Indebtedness
whether or not within a period of 360 consecutive days, unless such event of
default shall have been cured or waived for a period of not less than 90 con-
secutive days (it being acknowledged that any subsequent action, or any breach
of any financial covenants for a period commencing after the date of commence-
ment of such Blockage Period that, in either case, would give rise to an event
of default pursuant to any provisions under which an event of default previ-
ously existed or was continuing shall constitute a new event of default for
this purpose).
 
 Upon any payment or distribution of assets of the Company of any kind or
character, whether in cash, property or securities, to creditors upon any to-
tal or partial liquidation, dissolution, winding up, reorganization, assign-
ment for the benefit of creditors or marshaling of assets of the Company or in
a bankruptcy, reorganization, insolvency, receivership or other similar pro-
ceeding relating to the Company or its property, whether voluntary or involun-
tary, all principal of, interest on and all other amounts due or to become due
upon all Senior Indebtedness shall first be paid in full in cash, or such pay-
ment duly provided for to the satisfaction of the holders of Senior Indebted-
ness, before any payment or distribution of any kind or character is made on
account of any principal of, interest on or other amounts owing in respect of
the Securities, or for the acquisition of any of the Securities for cash,
property or otherwise. In the event of any such proceeding, after payment in
full of all sums owing with respect to Senior Indebtedness, the Holders of the
Securities, together with the holders of any obligations of the Company rank-
ing on a parity with the Securities, shall be entitled to be paid from the re-
maining assets of the Company the amounts at the time due and owing on account
of unpaid principal of and interest, if any, on the Securities and such other
obligations before any payment or other distribution,
<PAGE>
 
 
                                      63
whether in cash, property or otherwise, shall be made on account of any Capi-
tal Stock or any obligations of the Company ranking junior to the Securities
and such other obligations.
 
 If, notwithstanding the foregoing, any payment or distribution of any charac-
ter, whether in cash, securities or other property, shall be received by the
Trustee or any Holder in contravention of any of the terms hereof, such pay-
ment or distribution shall be received in trust for the benefit of, and shall
be paid over or delivered and transferred to, the holders of the Senior In-
debtedness then outstanding in accordance with the priorities then existing
among such holders for application to the payment of all Senior Indebtedness
remaining unpaid, to the extent necessary to pay all such Senior Indebtedness
in full. In the event of the failure of the Trustee or any Holder to endorse
or assign any such payment, distribution or security, each holder of Senior
Indebtedness is hereby irrevocably authorized to endorse or assign the same.
 
 No present or future holder of any Senior Indebtedness shall be prejudiced in
the right to enforce subordination of the indebtedness evidenced by the Secu-
rities by any act or failure to act on the part of the Company. Nothing con-
tained herein shall impair, as between the Company and the Holders of Securi-
ties of each Series, the obligation of the Company to pay to such Holders the
principal of and interest, if any, on such Securities or prevent the Trustee
or the Holder from exercising all rights, powers and remedies otherwise per-
mitted by applicable law or hereunder upon a Default or Event of Default here-
under, all subject to the rights of the holders of the Senior Indebtedness to
receive cash, securities or other property otherwise payable or deliverable to
the Holders.
 
 Senior Indebtedness shall not be deemed to have been paid in full unless the
holders thereof shall have received cash equal to the amount of such Senior
Indebtedness then outstanding. Upon the payment in full of all Senior Indebt-
edness, the Holders of Securities of each Series shall be subrogated to all
rights of any holders of Senior Indebtedness to receive any further payments
or distributions applicable to the Senior Indebtedness until the indebtedness
evidenced by the Securities of such Series shall have been paid in full, and
such payments or distributions received by such Holders, by reason of such
subrogation, of cash, securities or other property which otherwise would be
paid or distributed to the holders of Senior Indebtedness, shall, as between
the Company and its creditors other than the holders of Senior Indebtedness,
on the one hand, and such Holders, on the other hand, be deemed to be a pay-
ment by the Company on account of Senior Indebtedness, and not on account of
the Securities of such Series.
<PAGE>
 
 
                                      64
 
 The provisions of this Section 12.01 shall not impair any rights, interests,
remedies 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 In-
denture.
 
 The securing of any obligations of the Company, otherwise ranking on a parity
with the Securities or ranking junior to the Securities, shall not be deemed
to prevent such obligations from constituting, respectively, obligations rank-
ing on a parity with the Securities or ranking junior to the Securities.
 
 Section 12.02.  Reliance on Certificate of Liquidating Agent; Further Evi-
                 dence as to Ownership of Senior Indebtedness.
 
 Upon any payment or distribution of assets of the Company, the Trustee and
the Holders shall be entitled to rely upon an order or decree issued by any
court of competent jurisdiction in which such dissolution or winding up or
liquidation or reorganization or arrangement proceedings are pending or upon a
certificate of the trustee in bankruptcy, receiver, assignee for the benefit
of creditors or other person making such payment or distribution, delivered to
the Trustee or to the Holders, for the purpose of ascertaining the persons en-
titled to participate in such distribution, the holders of the Senior Indebt-
edness and other indebtedness of the Company, the amount thereof or payable
thereon, the amount or amounts paid or distributed thereon and all other facts
pertinent thereto or to this Article 12. In the absence of any such bankruptcy
trustee, receiver, assignee 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 (or a trustee or representative on behalf of such holder)
as evidence that such person is a holder of Senior Indebtedness (or is such a
trustee or representative). If the Trustee determines, in good faith, that
further evidence is required with respect to the right of any person as a
holder of Senior Indebtedness to participate in any payment or distributions
pursuant to this Article 12, the Trustee may request such person to furnish
evidence to the reasonable satisfaction of the Trustee as to the amount of Se-
nior Indebtedness held by such person, as to the extent to which such person
is entitled to participate in such payment or distribution, and as to other
facts pertinent to the rights of such persons under this Article 12, and if
such evidence is not furnished, the Trustee may defer any payment to such per-
son pending judicial determination as to the right of such person to receive
such payment.
<PAGE>
 
 
                                      65
 
 Section 12.03.  Payment Permitted If No Default.
 
 Nothing contained in this Article 12 or elsewhere in this Indenture, or in
any of the Securities, shall prevent (a) the Company at any time, except dur-
ing the pendency of any of the events described in the second and third para-
graphs of Section 12.01, from making payments of the principal of or interest,
if any, on the Securities, or (b) the application by the Trustee or any Paying
Agent of any moneys deposited with it hereunder to payments of the principal
of or interest, if any, on the Securities, unless and until the Trustee or
such Paying Agent, as the case may be, shall have timely received the Offi-
cer's Certificate or written notice provided for in Section 12.05.
 
 Section 12.04.  Disputes with Holders of Certain Senior Indebtedness.
 
 Any failure by the Company to make any payment on or under any Senior Indebt-
edness, other than any Senior Indebtedness as to which the provisions of this
Section 12.04 shall have been waived by the Company in the instrument or in-
struments by which the Company incurred, assumed, guaranteed or otherwise cre-
ated such Senior Indebtedness, shall not be deemed a default under Section
12.01 if (i) the Company shall be disputing its obligation to make such pay-
ment or perform such obligation, and (ii) either (A) no final judgment relat-
ing to such dispute shall have been issued against the Company which is in
full force and effect and is not subject to further review, including a judg-
ment that has become final by reason of the expiration of the time within
which a party may seek further appeal or review, or (B) in the event of a
judgment that is subject to further review or appeal has been issued, the Com-
pany shall in good faith be prosecuting an appeal or other proceeding for re-
view, and a stay of execution shall have been obtained pending such appeal or
review.
 
 Section 12.05.  Trustee Not Charged with Knowledge of Prohibition.
 
 Anything in this Article 12 or elsewhere in this Indenture contained to the
contrary notwithstanding, the Trustee shall not at any time be charged with
knowledge of the existence of any facts which would prohibit the making of any
payment of moneys to or by the Trustee and shall be entitled to assume conclu-
sively that no such facts exist and that no event specified in the third para-
graph of Section 12.01 has happened, unless and until the Trustee shall have
received an Officer's Certificate to that effect or notice in writing to that
effect signed by or on behalf of the holder or holders, or their representa-
tives, of Senior Indebtedness who shall have been certified by the Company or
otherwise established to
<PAGE>
 
 
                                      66
the reasonable satisfaction of the Trustee to be such holder or holders or
representatives or from any trustee under any indenture pursuant to which such
Senior Indebtedness shall be outstanding; provided, however, that, if the
Trustee shall not have received the Officer's Certificate or notice provided
for in this Section 12.05 at least three Business Days preceding the date upon
which by the terms hereof any such moneys may become payable for any purpose
(including, without limitation, the payment of either the principal of or in-
terest, if any, on any Security), then, anything herein contained to the con-
trary notwithstanding, the Trustee shall have full power and authority to re-
ceive such moneys and apply the same to the purpose for which they were re-
ceived and shall not be affected by any notice to the contrary which may be
received by it within three Business Days preceding such date. The Company
shall give prompt written notice to the Trustee and to each Paying Agent of
any facts which would prohibit any payment of moneys to or by the Trustee or
any Paying Agent, and the Trustee shall not be charged with knowledge of the
curing of any default or the elimination of any other fact or condition pre-
venting such payment or distribution unless and until the Trustee shall have
received an Officer's Certificate to such effect.
 
 Section 12.06.  Trustee to Effectuate Subordination.
 
 Each Holder of Securities by such Holder's acceptance thereof authorizes and
directs the Trustee on his behalf to take such action as may be necessary or
appropriate to effectuate the subordination as between such Holder and holders
of Senior Indebtedness as provided in this Article 12 and appoints the Trustee
its attorney-in-fact for any and all such purposes.
 
 Section 12.07.  Rights of Trustee as Holder of Senior Indebtedness.
 
 The Trustee shall be entitled to all the rights set forth in this Article 12
with respect to any Senior Indebtedness which may at the time be held by it,
to the same extent as any other holder of Senior Indebtedness and nothing in
this Indenture shall deprive the Trustee of any of its rights as such holder.
Nothing in this Article 12 shall apply to claims of, or payments to, the
Trustee under or pursuant to Section 7.07.
 
 Section 12.08.  Article Applicable to Paying Agents.
 
 In case at any time any Paying Agent other than the Trustee shall have been
appointed by the Company and be then acting hereunder, the term "Trustee" as
used in this Article 12 shall in such case (unless the context shall otherwise
<PAGE>
 
 
                                      67
require) be construed as extending to and including such Paying Agent within
its meaning as fully for all intents and purposes as if the Paying Agent were
named in this Article 12 in addition to or in place of the Trustee; provided,
however, that Sections 12.05 and 12.07 shall not apply to the Company if it
acts as Paying Agent.
 
 Section 12.09. Subordination Rights Not Impaired by Acts or Omissions of the
                Company or Holders of Senior Indebtedness.
 
 No right of any present or future holders of any Senior Indebtedness to en-
force subordination as herein provided shall at any time in any way be preju-
diced 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 which any such holder may have
or be otherwise charged with. The holders of Senior Indebtedness may, at any
time or from time to time and in their absolute discretion, change the manner,
place or terms of payment, change or extend the time of payment of, or renew
or alter, any such Senior Indebtedness, or amend or supplement any instrument
pursuant to which any such Senior Indebtedness is issued or by which it may be
secured, or release any security therefor, or exercise or refrain from exer-
cising any other of their rights under the Senior Indebtedness, including,
without limitation, the waiver of default thereunder, all without notice to or
assent from the Holders of the Securities or the Trustee and without affecting
the obligations of the Company, the Trustee or the Holders of Securities under
this Article 12.
 
 Section 12.10.  Trustee Not Fiduciary for Holders of Senior Indebtedness.
 
 The Trustee shall not be deemed to owe any fiduciary duty to the holder of
the Senior Indebtedness, and shall not be liable to any such holders if it
shall mistakenly pay over or distribute money or assets to Securityholders or
the Company.
<PAGE>
 
 
                                       68
 
                                   SIGNATURES
 
 In Witness Whereof, the parties hereto have caused this Indenture to be duly
executed, and their respective corporate seals to be hereunto affixed and at-
tested, all as of the date first written above.
 
                                   The Coastal Corporation
 
[SEAL]
 
Attest:                                By:
    ------------------------           ----------------------------------------
 
                                       ----------------------------------------
[SEAL]
 
Attest:                                By:
    ------------------------           ----------------------------------------
<PAGE>
 
                                                                      EXHIBIT A
 
                          [Form of Face of Security]
 
 [If the Holder of this Security (as indicated below) is The Depository Trust
Company ("DTC") or a nominee of DTC, this Security is a Global Security and
the following two legends apply:
 
 UNLESS THIS SECURITY IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DE-
POSITORY TRUST COMPANY ("DTC"), 55 WATER STREET, NEW YORK, NEW YORK TO THE IS-
SUER OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND SUCH
SECURITY ISSUED IS REGISTERED IN THE NAME OF CEDE & CO., OR SUCH OTHER NAME AS
REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC, ANY TRANSFER, PLEDGE OR
OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL, SINCE
THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.
 
 UNLESS IT IS EXCHANGED IN WHOLE OR IN PART FOR SECURITIES IN DEFINITIVE REG-
ISTERED FORM, THIS SECURITY MAY NOT BE TRANSFERRED EXCEPT AS A WHOLE BY DTC TO
A NOMINEE OF DTC OR BY A NOMINEE OF DTC TO DTC OR ANOTHER NOMINEE OF DTC OR BY
DTC OR ANY SUCH NOMINEE TO A SUCCESSOR OF DTC OR A NOMINEE OF SUCH SUCCESSOR.]
 
 [The following is to be included if the Security is an Original Issue Dis-
count Security:]
 
 [FOR PURPOSES OF SECTION 1273 AND 1275 OF THE UNITED STATES INTERNAL REVENUE
CODE OF 1986, AS AMENDED: (I) THE ISSUE DATE OF THIS SECURITY IS             ;
(II) THE YIELD TO MATURITY IS    %; (III) THE ORIGINAL ISSUE DISCOUNT PER
$       FACE AMOUNT AT WHICH THE SECURITY IS ISSUED IS $      ; AND (IV) THE
[EXACT] [APPROXIMATE] METHOD HAS BEEN USED TO DETERMINE YIELD FOR THE ACCRUAL
PERIOD BEGINNING              AND ENDING              AND THE AMOUNT OF THE
ORIGINAL ISSUE DISCOUNT PER $       FACE AMOUNT ALLOCABLE TO THE ACCRUAL PE-
RIOD BEGINNING              AND ENDING              IS   $      ].
 
<PAGE>
 
 
                                      A-2
 
                            The Coastal Corporation
                              [title of Security]
 
<TABLE>
<CAPTION>
RATE OF INTEREST               MATURITY DATE                           ORIGINAL ISSUE DATE
- ----------------               -------------                           -------------------
<S>                            <C>                                     <C>
 
No.                                                                          $
</TABLE>
 
 The Coastal Corporation, a corporation duly organized and existing under the
laws of the State of Delaware (herein called the "Company"), for value re-
ceived, hereby promises to pay to or registered assigns, the principal sum of
on the Maturity Date shown above, and to pay interest thereon, at the annual
rate of interest shown above, from the Original Issue Date shown above or from
the most recent Interest Payment Date (as hereinafter defined) to which inter-
est has been paid or duly provided for, payable semi-annually on and of each
year and at maturity (an "Interest Payment Date"), commencing on the first
such date after the Original Issue Date, except that if the Original Issue
Date is on or after a Regular Record Date but before the next Interest Payment
Date, interest payments will commence on the second Interest Payment Date fol-
lowing the Original Issue Date.
 
 [reference to currency[ies] of payment and currency exchange arrangements, if
applicable.]
 
 The interest so payable, and punctually paid or duly provided for, on any In-
terest Payment Date will, as provided in the Indenture, be paid to the person
in whose name this [name of Security] is registered at the close of business
on the Regular Record Date for any such Interest Payment Date, which shall be
the fifteenth calendar day (whether or not a Business Day) preceding the ap-
plicable Interest Payment Date. Any such interest not so punctually paid or
duly provided for, and any interest payable on such defaulted interest (to the
extent lawful), will forthwith cease to be payable to the Holder on such Regu-
lar Record Date and shall be paid to the person in whose name this [name of
Security] is registered at the close of business on a special record date for
the payment of such defaulted interest to be fixed by the Company, notice of
which shall be given to Holders of [name of Series] not less than 15 days
prior to such special record date. Payment
<PAGE>
 
 
                                      A-3

of the principal of and interest on this [name of Security] will be made at
the agency of the Company maintained for that purpose in [New York, New York
or other place of payment] and at any other office or agency maintained by the
Company for such purpose, in [reference to United States dollars or other cur-
rency of payment]; provided, however, that at the option of the Company pay-
ment of interest, other than interest due on the Maturity Date, may be made by
check mailed to the address of the person entitled thereto as such address
shall appear in the Security Register. [Include the following, if applicable:]
Payments on the Maturity Date will be made in immediately available funds
against presentment of this [name of Security].
 
 Reference is hereby made to the further provisions of this [name of Security]
set forth on the reverse hereof, which further provisions shall for all pur-
poses have the same effect as if set forth at this place.
 
 Unless the certificate of authentication hereon has been executed by the
Trustee referred to on the reverse hereof by manual signature, this [name of
Security] shall not be entitled to any benefit under the Indenture or be valid
or obligatory for any purpose.
 
 In Witness Whereof, The Coastal Corporation has caused this instrument to be
executed in its corporate name by the facsimile signature of its duly autho-
rized officers and has caused a facsimile of its corporate seal to be affixed
hereunto or imprinted hereon.
 
                                   The Coastal Corporation
 
 
Attest: ________________________   By: ________________________________________
        [Assistant] Secretary                    [Title of Officer]
<PAGE>
 
 
                                      A-4
DATED:
 
                    Trustee's Certificate of Authentication
 
 This is one of the [name of Series] referred to in the within-mentioned
Indenture.
 
 
 
                                   By: ________________________________________
                                                Authorized Signatory
 
                                [Reverse Side]
 
                            The Coastal Corporation
                              [Name of Security]
 
 This [name of Security] is one of a duly authorized issue of [name of Securi-
ties] of the Company (which term includes any successor corporation under the
Indenture hereinafter referred to) designated as its [title of Series] (the
"[name of Series]"),             issued or to be issued pursuant to an Inden-
ture, dated as of               , 199  (the "Indenture"), between the Company
and Harris Trust and Savings Bank, as Trustee (the "Trustee," which term in-
cludes any successor trustee under the Indenture); and under [reference to Au-
thorizing Resolution and/or supplemental indenture (if any) relating to the
Series]. The terms of this [name of Security] include those stated in the In-
denture and [reference to Authorizing Resolution and/or supplemental indenture
(if any) relating to the Series] and those made part of the Indenture by ref-
erence to the Trust Indenture Act of 1939, as in effect on the date of the In-
denture. Reference is hereby made to the Indenture and all [further] supple-
mental indentures thereto for a statement of the respective rights, limitation
of rights, duties and immunities thereunder of the Company, the Trustee and
the Holders and of the terms upon which the [name of Security] are, and are to
be, authenticated and delivered.
 
 This [name of Series] is a Series of Securities issued or to be issued by the
Company under the Indenture, and this Series is limited in aggregate principal
amount to $     . The Indenture provides that the Securities of the Com-
<PAGE>
 
 
                                      A-5

pany referred to therein ("Securities"), including the [name of Series], may
be issued in one or more Series, which different Series may be issued in such
aggregate principal amounts and on such terms (including, but not limited to,
terms relating to interest rate or rates, provisions for determining such in-
terest rate or rates and adjustments thereto, maturity, redemption (optional
and mandatory), sinking fund, covenants and Events of Default) as may be pro-
vided in or pursuant to the Authorizing Resolutions and/or supplemental inden-
ture (if any) relating to the several Series.
 
 The [name of Series] are subordinated in right of payment, in the manner and
to the extent set forth in the Indenture, to the prior payment in full of all
Senior Indebtedness (as defined in the Indenture). Each Holder by accepting a
Security agrees to such subordination and authorizes the Trustee to give it
effect.
 
 [The following to be included if the Securities are not redeemable prior to
maturity.]
 
 This [name of Security] may not be redeemed prior to its Maturity Date.
 
 [The following paragraph, or other appropriate redemption provisions, to be
included if the Securities are Redeemable Securities:]
 
 The [name of Series] are subject to redemption upon not less than 30 nor more
than 60 days' notice by mail, [the following clause to be included if there is
a Sinking Fund:] [(1) on [annual Sinking Fund Redemption Date] in each year
commencing with the year [year of first Sinking Fund payment] through opera-
tion of the Sinking Fund at a Redemption Price equal to their principal amount
and (2)] [at any time or from time to time] in whole or in part, at the elec-
tion of the Company at a Redemption Price equal to the percentage set forth
below of the principal amount to be redeemed for the respective twelve-month
periods beginning [         ] of the years indicated:
 
                        [Schedule of Redemption Prices]
 
and thereafter at 100% of the principal amount thereof, together in each case
with accrued interest to the Redemption Date.
<PAGE>
 
 
                                      A-6
 
 [The following paragraph, or other appropriate Sinking Fund provision, to be
included if there is a Sinking Fund for the Series:]
 
 The Sinking Fund provides for the redemption on [first Sinking Fund Redemp-
tion Date] and on [annual Sinking Fund Redemption Date] in each year thereaf-
ter through [year of final Sinking Fund date] of not less than [minimum re-
quired Sinking Fund redemption amount] principal amount not more than [maximum
permitted Sinking Fund redemption amount] principal amount of [name of Se-
ries], [name of Series] purchased, acquired or redeemed by the Company other-
wise than by redemption through the Sinking Fund may be credited against Sink-
ing Fund requirements to the extent not previously so credited.
 
 [The following paragraph to be included if the Securities are Redeemable Se-
curities or Sinking Fund Securities:]
 
 If an event of redemption of this [name of Security] in part only, a new
[name of Security] or [name of Series] for the unredeemed portion hereof shall
be issued in the name of the Holder hereof upon the surrender hereof.
 
 [The following paragraph to be included if the Securities are not Original
Issue Discount Securities:]
 
 If an Event of Default, as defined in the Indenture and in the Authorizing
Resolution and/or supplemental indenture (if any) relating to the [name of Se-
ries] (if there shall be any additional Events of Default specified in respect
of the [name of Series]), shall occur and be continuing, the principal of all
the [name of Series] may be declared due and payable in the manner and with
the effect provided in the Indenture.
 
 [If the Securities are Original Issue Discount Securities, insert schedule as
to amounts which are payable on acceleration under Section 6.02 and provable
in bankruptcy under Section 6.09 from time to time.]
 
 The Indenture permits, with certain exceptions as therein provided, the
amendment thereof and the modification of the rights and obligations of the
Company and the rights of the Holders of the [name of Series] under the Inden-
ture at any time by the Company and the Trustee with the consent of the Hold-
ers of a majority in aggregate principal amount of the Securities affected
thereby, voting as a single class (which may include the [name of Series]), at
the time outstanding. The Indenture also contains provisions permitting the
Holders of specified
<PAGE>
 
 
                                      A-7

percentages in aggregate principal amount of the Securities at the time out-
standing to waive compliance by the Company with certain provisions of the In-
denture and certain past defaults under the Indenture and their consequences.
Any such consent or waiver by the Holder of this [name of Security] shall be
conclusive and binding upon such Holder and upon all future Holders of this
[name of Security] and of any [name of Security] issued upon the registration
of transfer hereof or in exchange herefor in lieu hereof, whether or not nota-
tion of such consent or waiver is made upon this [name of Security].
 
 The Indenture provides that no Holder may pursue any remedy under the Inden-
ture unless the Trustee shall have failed to act after notice of an Event of
Default and written requestn by Holders of at least 25% in principal amount of
the [name of Securities] of the applicable Series and the offer to the Trustee
of indemnity satisfactory to it; however, such provision does not affect the
right to sue for enforcement of any overdue payment on any Security.
 
 No reference herein to the Indenture and no provision of this [name of Secu-
rity] or of the Indenture shall alter or impair the obligation of the Company,
which is absolute and unconditional, to pay the principal of and interest on
this [name of Security] at the times, places and rates, and in the coin or
currency, herein prescribed.
 
 As provided in the Indenture and subject to certain limitations therein set
forth, the transfer of this [name of Security] is registrable in the Security
Register upon surrender of this [name of Security] for registration of trans-
fer at the agency of the Company provided for that purpose duly endorsed by,
or accompanied by a written instrument of transfer in substantially the form
accompanying this [name of Security] duly executed by, the Holder hereof or
his attorney duly authorized in writing, and thereupon one or more new [name
of Series], of authorized denominations and for the same aggregate principal
amount, will be issued to the designated transferee or transferees.
 
 The [name of Series] are issuable only in registered form without coupons in
denominations of [currency and minimum denomination] and any integral multiple
thereof. As provided in the Indenture and subject to certain limitations
therein set forth, the [name of Series] are exchangeable for a like aggregate
principal amount of [name of Series] of a different authorized denomination,
as requested by the Holder surrendering the same.
 
 No service charge shall be made for any such registration of transfer or ex-
change, but the Company may require payment of a sum sufficient to cover any
<PAGE>
 
 
                                      A-8

transfer tax or similar governmental charge payable in connection therewith
(other than any such transfer taxes or similar governmental charge payable
upon exchanges pursuant to Section 2.11, 3A.08 or 9.05 in which case such
transfer taxes or similar governmental charges shall be paid by the Company).
 
 Prior to due presentment of this [name of Security] for registration of
transfer, the Company, the Trustee and any agent of the Company or the Trustee
may treat the person in whose name this [name of Security] is registered as
the owner hereof for all purposes, whether or not this [name of Security] be
overdue, and neither the Company, the Trustee nor any such agent shall be af-
fected by notice to the contrary.
 
 [Reference to Foreign Currencies]
 
 All terms used in this [name of Security] which are defined in the Indenture
shall have the meanings assigned to them in the Indenture.
 
 Customary abbreviations may be used in the name of a [name of Security]
holder or any assignee, such as: TEN COM ( = tenants in common), TEN ENT
( = tenants by the entireties), JT TEN ( = joint tenants with right of survi-
vorship and not as tenants in common), CUST ( = Custodian) and U/G/M/A
( = Uniform Gifts to Minors Act).
 
 The Company will furnish to any [name of Security] holder of record, upon
written request, without charge, a copy of the Indenture. Requests may be made
to: The Coastal Corporation, Coastal Tower, Nine Greenway Plaza, Houston,
Texas 77046-0995, Attention: Corporate Secretary.
<PAGE>
 
 
                                      A-9

                                ASSIGNMENT FORM
 
 If you the holder want to assign this [name of Security], fill in the form
below and have your signature guaranteed:
 
I or we assign and transfer this [name of Security] to:
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
                 (PRINT OR TYPE NAME, ADDRESS AND ZIP CODE AND
                SOCIAL SECURITY OR TAX ID NUMBER OF ASSIGNEES)
 
and irrevocably appoint, ______agent to transfer this [name of Security] on the
books of the Company. The agent may substitute another to act for him.
 
Dated: _________________________     Signed: __________________________________
                                     __________________________________________
                                       (SIGN EXACTLY AS NAME APPEARS ON OTHER
                                         SIDE OF THIS [NAME OF SECURITY] )
 
SIGNATURE GUARANTEE: __________________________________________________________
 
 Notice: Signature(s) must be guaranteed by a member firm of the New York
Stock Exchange or a commercial bank or trust company.

<PAGE>
 
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------

                                                                     EXHIBIT 4.5
                               WARRANT AGREEMENT
 
                                    BETWEEN
 
                            THE COASTAL CORPORATION
[LOGO APPEARS                         AND
HERE]
                                           , AS WARRANT AGENT
                             --------------------
                            DATED AS OF       , 199
                             --------------------
 
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
<PAGE>

                                       i

 
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                                                           PAGE
                                                                           ----
 <C>         <S>                                                           <C>
 Section 1.  Appointment of Warrant Agent................................    1
 Section 2.  Warrant Certificates........................................    1
 Section 3.  Execution of Warrant Certificates...........................    1
 Section 4.  Registration and Countersignature...........................    2
 Section 5.  Registration of Transfers and Exchanges.....................    2
         (a) Transfer and Exchange of Warrants...........................    2
         (b) Obligations with Respect to Transfers and Exchanges of
             Warrants....................................................    3
 Section 6.  Exercise of Warrants........................................    3
 Section 7.  Payment of Taxes............................................    5
 Section 8.  Mutilated or Missing Warrant Certificates...................    5
 Section 9.  Reservation of Warrant Shares...............................    5
 Section 10. Obtaining Stock Exchange Listings...........................    6
 Section 11. Warrant Price: Adjustments..................................    7
 (a)         Adjustment for Change in Common Stock.......................    7
 (b)         Adjustment for Rights and Warrants..........................    7
 (c)         Adjustment for Certain Distributions........................    8
 (d)         Certain Exercise Price and Exercise Rate Adjustments........    9
 (e)         Voluntary Adjustment........................................    9
 (f)         Reorganization of the Company...............................    9
 (g)         When Issuance or Payment May Be Deferred....................   10
 (h)         When Adjustment May Be Deferred.............................   10
 (i)         Specificity of Adjustment...................................   11
 (j)         Company Determination Final.................................   11
 (k)         Adjustment for Tax Purposes.................................   11
 (l)         Adjustments to Par Value....................................   11
 (m)         No Other Adjustment for Dividends...........................   11
 (n)         Multiple Adjustments........................................   11
 (o)         Definitions.................................................   11
 (p)         Warrant Agent's Disclaimer..................................   12
 Section 12. Fractional Interests........................................   12
 Section 13. Notices to Warrant Holders..................................   13
 Section 14. Reports.....................................................   14
 Section 15. Merger, Consolidation or Change of Name of Warrant Agent....   14
 Section 16. Warrant Agent...............................................   15
 Section 17. Change of Warrant Agent.....................................   18
 Section 18. Notices to the Company and Warrant Agent....................   19
 Section 19. Supplements and Amendments..................................   19
 Section 20. Successors..................................................   20
 Section 21. Termination.................................................   20
 Section 22. Governing Law...............................................   20
 Section 23. Benefits of This Agreement..................................   20
 Section 24. Severability................................................   21
 Section 25. Counterparts................................................   21
 Section 26. Headings....................................................   21
    Exhibit A--Form of Warrant Certificate................................ A-1
</TABLE>
 

<PAGE>
 
  WARRANT AGREEMENT dated as of       , 199  between The Coastal Corporation,
a Delaware corporation (the "Company"), and      , as warrant agent (the "War-
rant Agent").
 
  WHEREAS, the Company proposes to issue warrants (the "Warrants") to purchase
an aggregate of      shares (the "Warrant Shares") of common stock, par value
$.33 1/3 per share (the "Common Stock"), of the Company at an initial cash
purchase price of $     per share at any time [after and] prior to       P.M.
Houston time on       (the "Expiration Date");
 
  WHEREAS, the Company desires the Warrant Agent to act on behalf of the Com-
pany, and the Warrant Agent is willing so to act, in connection with the issu-
ance of Warrant Certificates (as defined below) and other matters as provided
herein; (as defined below) and other matters as provided herein;
 
  NOW, THEREFORE, in consideration of the premises and the mutual agreements
herein set forth, the parties hereto agree as follows:
 
  Section 1. Appointment of Warrant Agent. The Company hereby appoints the
Warrant Agent to act as agent for the Company in accordance with the terms and
conditions set forth in this Agreement, and the Warrant Agent hereby accepts
such appointment.
 
  Section 2. Warrant Certificates. (a) The Warrants will be issued in defini-
tive form substantially in the form of Exhibit A. Any certificates (the "War-
rant Certificates") evidencing the Warrants to be delivered pursuant to this
Agreement shall be substantially in the form set forth in Exhibit A attached
hereto.
 
  Section 3. Execution of Warrant Certificates. Warrant Certificates shall be
signed on behalf of the Company by its Chairman of the Board, Chief Executive
Officer, Chief Operating Officer or its President or a Vice President or the
Chief Financial Officer (each an "Executing Officer"). Each such signature
upon the Warrant Certificates may be in the form of a facsimile signature of
the Executing Officer and may be imprinted or otherwise reproduced on the War-
rant Certificates.
 
  In case any Executing Officer of the Company who shall have signed any of
the Warrant Certificates shall cease to be an Executing Officer before the
Warrant Certificates so signed shall have been countersigned by the Warrant
Agent, or disposed of by the Company, such Warrant Certificates nevertheless
<PAGE>

                                      2


 
may be countersigned and delivered or disposed of as though such person had
not ceased to be an Executing Officer of the Company; and any Warrant Certifi-
cate may be signed on behalf of the Company by any person who, at the actual
date of the execution of such Warrant Certificate, shall be a proper Executing
Officer of the Company to sign such Warrant Certificate, although at the date
of the execution of this Warrant Agreement any such person was not such an
officer.
 
  Section 4. Registration and Countersignature. The Warrant Agent, on behalf
of the Company, shall number and register the Warrant Certificates in a regis-
ter (the "Warrant Register") as they are issued by the Company. Warrant Cer-
tificates shall be manually countersigned by an authorized officer of the War-
rant Agent and shall not be valid for any purpose unless so countersigned.
Warrant Certificates shall be dated the date of such countersignature. The
Warrant Agent shall, upon written instructions of the Chairman of the Board,
Chief Executive Officer, Chief Operating Officer, President or Vice President
or Chief Financial Officer of the Company, initially countersign, issue and
deliver Warrants entitling the holders thereof to purchase not more than the
number of Warrant Shares referred to above in the first recital hereof and
shall countersign and deliver Warrants as otherwise provided in this Agree-
ment.
 
  The Company and the Warrant Agent may deem and treat the registered hold-
er(s) of the Warrant Certificates as the absolute owner(s) thereof (notwith-
standing any notation of ownership or other writing thereon made by anyone),
for all purposes, and neither the Company nor the Warrant Agent shall be af-
fected by any notice to the contrary.
 
  Section 5. Registration of Transfers and Exchanges.
 
  (a) Transfer and Exchange of Warrants. When Warrants are presented to the
Warrant Agent with a request:
 
    (i) to register the transfer of the Warrants; or
 
    (ii) to exchange such Warrants for an equal number of Warrants of other
  authorized denominations, the Warrant Agent shall register the transfer or
  make the exchange as requested if the requirements for such transactions
  are met; provided, however, that the Warrants presented or surrendered for
  registration of transfer or exchange shall be duly endorsed or accompanied
  by a written instruction of transfer in form satisfactory to the Company
  and the Warrant Agent, duly executed by the holder thereof or by his at-
  torney, duly authorized in writing.
 
<PAGE>
                                      3


 
  (b) Obligations with Respect to Transfers and Exchanges of Warrants.
 
    (i) To permit registrations of transfers and exchanges, the Company
  shall execute and the Warrant Agent is hereby authorized to countersign,
  in accordance with the provisions of Section 4 and this Section 5, War-
  rants as required pursuant to the provisions of this Section 5.
 
    (ii) All Warrants issued upon any registration of transfer or exchange
  of Warrants shall be the valid obligations of the Company, entitled to the
  same benefits under this Warrant Agreement as the Warrants surrendered
  upon such registration of transfer or exchange.
 
    (iii) Prior to due presentment for registration of transfer of any War-
  rant, the Warrant Agent and the Company may deem and treat the person in
  whose name any Warrant is registered as the absolute owner of such War-
  rant, and neither the Warrant Agent nor the Company shall be affected by
  notice to the contrary.
 
    (iv) No service charge shall be made to a holder for any registration of
  transfer or exchange.
 
  Section 6. Exercise of Warrants.
 
  (a) Upon the terms and subject to the conditions set forth in this Agreement
and the Warrant Certificates, each Warrant holder shall have the right, which
may be exercised at any time [commencing on        , 199  and] until
P.M., Houston time, on             , to receive from the Company the number of
fully paid and nonassessable Warrant Shares which the holder may at the time
be entitled to receive on exercise of such Warrants and payment of the Exer-
cise Price (as defined herein) then in effect for such Warrant Shares. Each
Warrant not exercised prior to      P.M., New York time, on       shall expire
and all rights thereunder and all rights in respect thereof under this Agree-
ment and the Warrant Certificates shall cease as of such time.
 
  (b) A Warrant may be exercised upon surrender to the Company at the princi-
pal office of the Warrant Agent of the Warrant Certificate or Certificates ev-
idencing the Warrants to be exercised with the form of election to purchase on
the reverse thereof duly completed and signed (which signature shall be guar-
anteed by an "eligible guarantor" as defined in the regulations promulgated
under the Securities Exchange Act of 1934, as amended (the "Exchange Act"))
and upon payment to the Warrant Agent of the exercise price of $     per share
of Common Stock, subject to adjustment as set forth herein (the "Exercise
Price"), plus transfer taxes (if applicable pursuant to Section 7) for each of
the Warrant Shares in respect of which such Warrants are then exercised. Pay-
ment of the
 
<PAGE>
                                       4


 
aggregate Exercise Price shall be made (i) in cash or (ii) by certified or of-
ficial bank check payable to the order of the Company. All funds received upon
the exercise of the Warrants shall be delivered or deposited by the Warrant
Agent as instructed in writing by the Company.
 
  (c) Subject to the provisions of Section 7 hereof, upon such surrender of
Warrants and payment of the Exercise Price, the Company shall issue and cause
to be delivered with all reasonable dispatch to or upon the written order of
the Warrant holder and in such name or names as the Warrant holder may desig-
nate, a certificate or certificates for the number of full Warrant Shares is-
suable upon the exercise of such Warrants together with cash as provided in
Section 12; provided, however, that if any consolidation, merger, transfer or
lease of assets is proposed to be effected by the Company as described in sub-
section (f) of Section 11 hereof, or a tender offer or an exchange offer for
shares of Common Stock of the Company shall be made, upon such surrender of
Warrants and payment of the Exercise Price as aforesaid, the Company shall, as
soon as possible, but in any event not later than three Business Days (as de-
fined in subsection (o) of Section 11) thereafter, issue and cause to be de-
livered the full number of Warrant Shares issuable upon the exercise of such
Warrants in the manner described in this sentence and/or any other considera-
tion to be issued to such Warrant holder pursuant to subsection (f) of Section
11 hereof, together with cash as provided in Section 12. Such certificate or
certificates shall be deemed to have been issued and any person so designated
to be named therein shall be deemed to have become a holder of record of such
Warrant Shares as of the date of the surrender of such Warrants and payment of
the Exercise Price.
 
  (d) The Warrants shall be exercisable, at the election of the registered
holders thereof, either in full or from time to time in part, and, in the
event that a certificate evidencing Warrants is exercised in respect of fewer
than all of the Warrant Shares issuable on such exercise at any time prior to
the date of expiration of the Warrants, a new certificate evidencing the re-
maining Warrant or Warrants will be issued and the Warrant Agent is hereby ir-
revocably authorized to countersign and to deliver the required new Warrant
Certificate or Certificates pursuant to the provisions of this Section and of
Section 5 hereof, and the Company, whenever required by the Warrant Agent,
will supply the Warrant Agent with Warrant Certificates duly executed on be-
half of the Company for such purpose.
 
  (e) All Warrant Certificates surrendered upon exercise of Warrants shall be
cancelled by the Warrant Agent and delivered to and disposed of by the Com-
 
<PAGE>

                                      5


 
pany in accordance with applicable law. The Warrant Agent shall account
promptly to the Company with respect to Warrants exercised and concurrently
pay to the Company payments, in whatever form permitted by this Warrant Agree-
ment, received by the Warrant Agent for the purchase of the Warrant Shares
through the exercise of such Warrants. The Warrant Agent shall keep copies of
this Agreement and any notices given or received hereunder available for in-
spection by the registered holders during normal business hours at its office.
The Company shall supply the Warrant Agent from time to time with such numbers
of copies of the Agreement as the Warrant Agent may request.
 
  Section 7. Payment of Taxes. The Company will pay all documentary stamp
taxes attributable to the initial issuance of Warrant Shares upon the exercise
of Warrants; provided, however, that the Company shall not be required to pay
any tax or taxes which may be payable in respect of any transfer involved in
the issue of any Warrant Certificates or any certificates for Warrant Shares
in a name other than that of the registered holder of a Warrant Certificate
surrendered upon the exercise of a Warrant, and the Company shall not be re-
quired to issue or deliver such Warrant Certificates or certificates for War-
rant Shares unless or until the person or persons requesting the issuance
thereof shall have paid to the Company the amount of such tax or shall have
established to the satisfaction of the Company that such tax has been paid.
 
  Section 8. Mutilated or Missing Warrant Certificates. In case any of the
Warrant Certificates shall be mutilated, lost, stolen or destroyed, the Com-
pany may in its discretion issue and the Warrant Agent may countersign, in ex-
change and substitution for and upon cancellation of the mutilated Warrant
Certificate, or in lieu of and substitution for the Warrant Certificate lost,
stolen or destroyed, a new Warrant Certificate of like tenor and representing
an equivalent number of Warrants, but only upon receipt of evidence reasonably
satisfactory to the Company and the Warrant Agent of such loss, theft or de-
struction of such Warrant Certificate and indemnity, if requested, satisfac-
tory to each of them. Applicants for such substitute Warrant Certificates
shall also comply with such other reasonable regulations and pay such other
reasonable charges as the Company or the Warrant Agent may prescribe.
 
  Section 9. Reservation of Warrant Shares. The Company will at all times re-
serve and keep available, free from preemptive rights, out of the aggregate of
its authorized but unissued Common Stock or its authorized and issued Common
Stock held in its treasury, for the purpose of enabling it to satisfy any
 
<PAGE>

                                      6



 
obligation to issue Warrant Shares upon exercise of Warrants, the maximum num-
ber of shares of Common Stock (as adjusted from time to time pursuant to Sec-
tion 11) which may then be deliverable upon the exercise of all outstanding
Warrants.
 
 The Company or, if appointed, the transfer agent for the Common Stock (the
"Transfer Agent") and every subsequent transfer agent for any shares of the
Company's Capital Stock (as defined in subsection (o) of Section 11) issuable
upon the exercise of any of the rights of purchase aforesaid will be irrevoca-
bly authorized and directed at all times to reserve such number of authorized
shares as shall be required for such purpose. The Company will keep a copy of
this Agreement on file with the Transfer Agent and with every subsequent
transfer agent for any shares of the Company's Capital Stock issuable upon the
exercise of the rights of purchase represented by the Warrants. The Warrant
Agent is hereby irrevocably authorized to requisition from time to time from
such Transfer Agent (including the Company if it is acting as Transfer Agent)
the stock certificates required to honor outstanding Warrants upon exercise
thereof in accordance with the terms of this Agreement. The Company will sup-
ply such Transfer Agent with duly executed certificates for such purposes and
will provide or otherwise make available any cash which may be payable as pro-
vided in Section 12. The Company will furnish such Transfer Agent a copy of
all notices of adjustments and certificates related thereto, transmitted to
each holder pursuant to Section 14 hereof.
 
 The Company covenants that all Warrant Shares which may be issued upon exer-
cise of Warrants will, upon payment of the Exercise Price therefore and the
issuance thereof, be fully paid, nonassessable, free of preemptive rights,
free from all taxes (subject to Section 7 hereof) and free from all liens,
charges and security interests, created by or through the Company, with re-
spect to the issue thereof.
 
 Section 10. Obtaining Stock Exchange Listings. The Company will from time to
time take all action which may be necessary so that the Warrant Shares, imme-
diately upon their issuance upon the exercise of Warrants, will be listed on
the principal securities exchanges and markets within the United States of
America, if any, on which other shares of Common Stock are then listed or
quoted. Upon the listing of such Warrant Shares, the Company shall notify the
Warrant Agent in writing.
 
<PAGE>
                                      7


 
 Section 11. Warrant Price; Adjustments. The Exercise Price and the number of
Warrant Shares issuable upon the exercise of each Warrant (the "Exercise
Rate") are subject to adjustment from time to time as set forth in this Sec-
tion 11.
 
 (a) Adjustment for Change in Common Stock. In case the Company shall at any
time after the date of this Agreement (i) pay a dividend, or make a distribu-
tion on, the Common Stock which is payable in shares of its Common Stock, (ii)
subdivide or reclassify its outstanding shares of Common Stock into a greater
number of securities (including shares of Common Stock), or (iii) combine or
reclassify outstanding shares of Common Stock into a smaller number of shares
(including shares of Common Stock), the Exercise Rate immediately prior to the
occurrence of such event shall be adjusted so that the holder of each Warrant
shall be entitled to receive upon payment of the Exercise Price the aggregate
number of shares of Common Stock of the Company which, if such Warrant had
been exercised immediately prior to the occurence of such event, such holder
would have owned or have been entitled to receive immediately after the occur-
rence of such event. An adjustment pursuant to this subparagraph (a) shall be-
come effective immediately after the record date in the case of a dividend and
shall become effective immediately after the effective date in the case of a
subdivision or combination. If, as a result of an adjustment made pursuant to
this subparagraph (a), the holder of any Warrant thereafter exercised shall
become entitled to receive shares of two or more classes of Capital Stock of
the Company, the Board of Directors of the Company (whose determination shall
be conclusive) shall determine the allocation between or among shares of such
classes of Capital Stock.
 
 In the event that at any time, as a result of an adjustment made pursuant to
this subparagraph (a), the holder of any Warrant thereafter exercised shall
become entitled to receive any shares or other securities of the Company other
than shares of Common Stock, thereafter the number of such other shares so re-
ceived upon exercise of any Warrant shall be subject to adjustment from time
to time in a manner and on terms as nearly equivalent as practicable to the
provisions with respect to the shares of Common Stock contained in this para-
graph, and other provisions of this paragraph 11(a) with respect to the Common
Stock shall apply on like terms to any such other shares or other securities.
 
 (b) Adjustment for Rights or Warrants. In case the Company shall fix a record
date for the issuance of rights or warrants to all holders of its Common
 
<PAGE>
                                      8



 
Stock entitling them to subscribe for or purchase Common Stock at a price per
share less than the Current Market Value per share of Common Stock (as defined
in subparagraph (o) below) at such record date, the Exercise Price shall be
adjusted by multiplying the Exercise Price in effect immediately prior to such
record date by a fraction, the numerator of which shall be the number of
Shares of Common Stock outstanding on such record date plus the number of
Shares of Common Stock which the aggregate offering price of the total number
of shares so offered would purchase at such Current Market Value, and the de-
nominator of which shall be the number of shares of Common Stock outstanding
on such record date plus the number of additional Shares of Common Stock of-
fered for subscription or purchase. Such adjustment shall be made successively
whenever such a record date is fixed, and shall become effective immediately
after such record date. In determining whether any rights or warrants entitle
the holders to subscribe for or purchase shares of Common Stock at less than
such Current Market Value, and in determining the aggregate offering price of
such shares, there shall be taken into account any consideration received by
the Company for such rights or warrants, the value of such consideration, if
other than cash, to be determined by the Board of Directors of the Company.
Common Stock owned by or held for the account of the Company or any majority
owned subsidiary shall not be deemed outstanding for the purpose of any ad-
justment required under this subparagraph (b). To the extent that shares of
Common Stock are not delivered after the expiration of such rights or war-
rants, the Exercise Price shall be readjusted to the Exercise Price which
would then be in effect had the adjustments made in respect of the issuance of
such rights or warrants been made on the basis of delivery of only the number
of shares of Common Stock actualy delivered.
 
 (c) Adjustment for Certain Distributions. In case the Company shall fix a
record date for making a distribution to all holders of its Common Stock of
evidences of its indebtedness or assets (excluding regular quarterly or other
periodic or recurring cash dividends or distributions and cash dividends or
distributions paid from retained earnings or referred to in subparagraph (a)
above) or rights or warrants to subscribe or warrants to purchase such evi-
dences of indebtedness or assets (excluding those referred to in subparagraph
(b) above), then in each such case the Exercise Price shall be adjusted by
multiplying the Exercise Price in effect immediatley prior to such record date
by a fraction (x) the numerator of which shall be the Current Market Value (as
defined in subparagraph (o) below) per share of Common Stock on such record
date, less the then fair market value (as determined in good faith by the
Board of Directors, whose determina-
 
<PAGE>
                                      9


 
tion shall be conclusive) of the portion of the assets or evidence of indebt-
edness so distributed or of such subscription rights or warrants applicable to
one share of the Common Stock and (y) the denominator of which shall be the
Current Market Value per share of the Common Stock on such record date. Such
adjustment shall be made successively whenever such a record date is fixed and
shall become effective immediately after such record date. Common Stock owned
by or held for the account of the Company or any majority owned subsidiary
shall not be deemed outstanding for the purpose of any adjustment required un-
der this subparagraph (c).
 
 (d) Certain Exercise Price and Exercise Rate Adjustments. After each Exercise
Rate adjustment pursuant to subparagraph 11(a), the Exercise Price shall be
adjusted by multiplying such Exercise Price immediately prior to such adjust-
ment by a fraction of which the numerator shall be the number of shares pur-
chasable upon exercise of each Warrant immediately prior to such adjustment,
and the denominator of which shall be the number of shares purchasable immedi-
ately thereafter. After each adjustment of the Exercise Price pursuant to sub-
paragraph 11(b) or (c), the Exercise Rate shall be adjusted by multiplying
such Exercise Rate by a fraction, the numerator of which the Exercise Price
immediately after such adjustment and the denominator of which is the Exercise
Price immediately prior to such adjustment.
 
 (e) Voluntary Adjustment. The Company from time to time may decrease the Ex-
ercise Price by any amount for any period of time if the period is at least 20
days and if the decrease is irrevocable during the period. Whenever the Exer-
cise Price is so decreased, the Company shall mail to the Warrant Agent and
each of the Warrant holders a notice of the decrease. The Company shall mail
the notice at least 15 days before the date the decreased Exercise Price takes
effect. The notice shall state the decreased Exercise Price and the period it
will be in effect.
 
 A decrease of the Exercise Price pursuant to this subsection (e) does not
change or adjust the Exercise Price otherwise in effect for purposes of this
Section 11.
 
 (f) Reorganization of the Company. If the Company consolidates or merges with
or into, or transfers or leases all or substantially all its assets to, any
person, upon consummation of such transaction the Warrants shall automatically
become exercisable for the kind and amount of securities, cash or other assets
which the holder of a Warrant would have owned immediately after the consoli-
dation,
 
<PAGE>
                                      10



 
merger, transfer or lease if the holder had exercised the Warrant immediately
before the effective date of the transaction. Concurrently with the consumma-
tion of such transaction, the corporation formed by or surviving any such con-
solidation or merger if other than the Company, or the person to which such
sale or conveyance shall have been made, shall enter into a supplemental War-
rant Agreement so providing and further providing for adjustments which shall
be as nearly equivalent as may be practical to the adjustments provided for in
this Section 11. The successor to the Company shall mail to Warrant holders a
notice describing the supplemental Warrant Agreement.
 
 If the issuer of securities deliverable upon exercise of Warrants under the
supplemental Warrant Agreement is an affiliate of the formed, surviving,
transferee or lessee corporation, that issuer shall join in the supplemental
Warrant Agreement.
 
  If this subsection (f) applies, subsections (a), (b) and (c) of this Section
11 shall not apply.
 
 (g) When Issuance or Payment May Be Deferred. In any case in which this Sec-
tion 11 shall require that an adjustment in the Exercise Rate and Exercise
Price be made effective as of a record date for a specified event, the Company
may elect to defer until the occurrence of such event (i) issuing to the
holder of any Warrant exercised after such record date the Warrant Shares and
other Capital Stock of the Company, if any, issuable upon such exercise over
and above the Warrant Shares and other Capital Stock of the Company, if any,
issuable upon such exercise on the basis of the Exercise Rate and Exercise
Price prior to adjustment and (ii) paying to such holder any amount in cash in
lieu of a fractional share pursuant to Section 12, provided, however, that the
Company shall deliver to such holder a due bill or other appropriate instru-
ment evidencing such holder's right to receive such additional Warrant Shares,
other Capital Stock and cash upon the occurrence of the event requiring such
adjustment.
 
 (h) When Adjustment May be Deferred. No adjustment in the Exercise Price and
Exercise Rate shall be required unless and until the earlier of the following
shall have occurred: (x) such adjustment would require an increase or decrease
of at least 1% in the Exercise Price and Exercise Rate or (y) a period of
three years shall have elapsed from the date of the occurrence of any event
requiring any such adjustment pursuant to subparagraphs (a), (b) or (c) above.
All adjustments shall be made to the nearest one hundredth of a Share and the
nearest cent, and any adjustments which by reason of this subparagraph (f) are
not required to
 
<PAGE>
                                      11


 
be made shall be carried forward cumulatively and taken into account in any
subsequent adjustment which (including such carry-forward) is required to be
made under this subparagraph (h).
 
 (i) Specificity of Adjustment. Irrespective of any adjustments in the number
or kind of shares purchasable upon the exercise of the Warrants, Warrants
theretofore or thereafter issued may continue to express the same number and
kind of shares per Warrant as are stated on the Warrants initially issuable
pursuant to this Agreement.
 
 (j) Company Determination Final. Any determination that the Company or the
Board of Directors of the Company must make pursuant to this Section 11 will
be conclusive if made in good faith.
 
 (k) Adjustment for Tax Purposes. The Company may make such increases in the
Exercise Price and Exercise Rate, in addition to those otherwise required by
this Section 11, as it considers to be advisable in order that any event
treated for Federal income tax purposes as a dividend of stock or stock rights
shall not be taxable to the recipients.
 
 (l) Adjustments to Par Value. The Company shall make such adjustments to the
par value of the Common Stock in order that, upon exercise of the Warrants,
the Warrant Shares will be fully paid and non-assessable.
 
 (m) No Other Adjustment for Dividends.  Except as provided in this Section
11, no adjustment will be made for dividends on any Common Stock.
 
 (n) Multiple Adjustments. After an adjustment to the Exercise Price and Exer-
cise Rate under this Section 11, any subsequent event requiring an adjustment
under this Section 11 shall cause an adjustment to the Exercise Price and Exer-
cise Rate as so adjusted.
 
 (o) Definitions.
 
 "Business Day" shall mean any day on which (i) banks in New York City, (ii)
the principal national securities exchange or market, if any, on which the
Common Stock is listed or admitted to trading and (iii) the principal national
securities exchange or market, if any, on which the Warrants are listed or ad-
mitted to trading are each open for business.
 
 "Capital Stock" means, with respect to any corporation, any and all shares,
interests, rights to purchase, warrants, options, participations or other
equivalents of or interests (however designated) in stock issued by that cor-
poration.
 
<PAGE>

                                      12


 
 "Current Market Value" per share of Common Stock or of any other security at
any date shall be the average of the daily closing prices for the 30 consecu-
tive business days commencing 45 business days before the day in question. The
closing price for each day shall be (i) if the Common Stock is listed or ad-
mitted for trading on any national securities exchange, the last sale price
(regular way), or the average of the closing bid and ask prices, if no sale
occurred, of Common Stock on the principal securities exchange on which the
Common Stock is listed, (ii) if not listed as described in (i), the mean be-
tween the closing high bid and low asked quotations of Common Stock in the Na-
tional Association of Securities Dealers, Inc., Automated Quotation System, or
any similar system or automated dissemination of quotations or securities
prices then in common use, if so quoted, or (iii) if not quoted as described
in clause (ii), the mean between the high bid and low asked quotations for
Common Stock as reported by the National Quotation Bureau Incorporated if at
least two securities dealers have inserted both bid and asked quotations for
Common Stock on at least 5 of the 10 preceding days. If none of the conditions
set forth above is met, the Closing Price of Common Stock on any day or the
average of such Closing Prices for any period shall be the fair market value
of Common Stock as determined by a member firm of the New York Stock Exchange,
Inc., selected by the Company.
 
 (p) Warrants Agent's Disclaimer. The Warrant Agent has no duty to determine
when an adjustment under this Section 11 should be made, how it should be made
or what it should be. The Warrant Agent has no duty to determine whether any
provisions of a supplemental Warrant Agreement under subsection (g) of this
Section 11 are correct. The Warrant Agent makes no representation as to the
validity or value of any securities or assets issued upon exercise of War-
rants. The Warrant Agent shall not be responsible for the Company's failure to
comply with this Section 11.
 
 Section 12. Fractional Interests. The Company shall not be required to issue
fractional Warrant Shares on the exercise of Warrants. If more than one War-
rant shall be presented for exercise in full at the same time by the same
holder, the number of full Warrant Shares which shall be issuable upon the ex-
ercise thereof shall be computed on the basis of the aggregate number of War-
rant Shares purchasable on exercise of the Warrants so presented. If any frac-
tion of a Warrant Share would, except for the provisions of this Section 12,
be issuable on the exercise of any Warrants (or specified portion thereof),
the Company shall pay an amount in cash equal to the Current Market Value per
Warrant Share on the day immediately preceding the date the Warrant is pre-
sented for exercise, multiplied by such fraction.
 
<PAGE>

                                      13

 
 Section 13. Notices to Warrant Holders. Upon any adjustment of the Exercise
Rate and Exercise Price pursuant to Section 11, the Company shall promptly
thereafter but in no event later than 15 days (i) cause to be filed with the
Warrant Agent a certificate of a firm of independent public accountants of na-
tionally recognized standing selected by the Board of Directors of the Company
(who may be the regular auditors of the Company) setting forth the Exercise
Rate after such adjustment and setting forth in reasonable detail the method
of calculation and the facts upon which such calculations are based, which
certificate shall be conclusive evidence of the correctness of the matters set
forth therein, and (ii) cause to be given to each of the registered holders of
the Warrant Certificates at his or her address appearing on the Warrant Regis-
ter written notice of such adjustments by first-class mail, postage prepaid.
Where appropriate, such notice may be given in advance and included as part of
the notice required to be mailed under the other provisions of this Section
13.
 
 In case:
 
   (a) the Company shall authorize the issuance to all holders of shares of
  Common Stock of rights, options or warrants to subscribe for or purchase
  shares of Common Stock or of any other subscription rights or warrants; or
 
   (b) of any consolidation or merger to which the Company is a party and
  for which approval of any stockholders of the Company is required, or of
  the conveyance or transfer of the properties and assets of the Company
  substantially as an entirety, or of any reclassification or change of Com-
  mon Stock issuable upon exercise of the Warrants (other than a change in
  par value, or from par value to no par value, or from no par value to par
  value, or as a result of a subdivision or combination), or of a tender of-
  fer or exchange offer for shares of Common Stock; or
 
   (c) of the voluntary or involuntary dissolution, liquidation or winding
  up of the Company; or
 
   (d) the Company proposes to take any action which would require an ad-
  justment of the Exercise Rate and Exercise Price pursuant to Section 11;
  or
 
   (e) the Company takes any action that would require a supplemental War-
  rant Agreement pursuant to subsection (f) of Section 11;
 
then the Company shall cause to be filed with the Warrant Agent and shall
cause to be given to each of the registered holders of the Warrant Certifi-
cates at his or her address appearing on the Warrant Register, at least 20
days (or 10 days in any case specified in clauses (a) or (b) above) prior to
the applicable record date
 
<PAGE>

                                      14


 
hereinafter specified, or promptly in the case of events for which there is no
record date, by first class mail, postage prepaid, a written notice stating
(i) the date as of which the holders of record of shares of Common Stock to be
entitled to receive any such rights, options, warrants or distribution are to
be determined, or (ii) the initial expiration date set forth in any tender of-
fer or exchange offer for shares of Common Stock, or (iii) the date on which
any such reclassification, consolidation, merger, conveyance, transfer, disso-
lution, liquidation or winding up is expected to become effective or consum-
mated, and the date as of which it is expected that holders of record of
shares of Common Stock shall be entitled to exchange such shares for securi-
ties or other property, if any, deliverable upon such reclassification, con-
solidation, merger, conveyance, transfer, dissolution, liquidation or winding
up. The failure to give the notice required by this Section 13 or any defect
therein shall not affect the legality or validity of any distribution, right,
option, warrant, reclassification, consolidation, merger, conveyance, trans-
fer, dissolution, liquidation or winding up, or the vote upon any action.
Nothing contained in this Agreement or in any of the Warrant Certificates
shall be construed as conferring upon the holders thereof the right to vote or
to consent or to receive notice as shareholders in respect of the meetings of
shareholders or the election of Directors of the Company or any other matter,
or any rights whatsoever as shareholders of the Company.
 
 Section 14. Reports. Whether or not required by the rules and regulations of
the SEC, so long as any Warrants or Warrant Shares are outstanding, the Com-
pany will furnish to the registered holders of Warrants and Warrant Shares all
financial information that would be required to be contained in a filing with
the SEC on Forms 10-Q, 10-K and 8-K if the Company were required to file such
forms. In addition, whether or not required by the rules and regulations of
the SEC, the Company will file a copy of all such information and reports with
the SEC for public availability (unless the SEC will not accept such a filing)
and make such information available to investors who request it in writing.
 
 Section 15. Merger, Consolidation or Change of Name of Warrant Agent. Any
corporation into which the Warrant Agent may be merged or with which it may be
consolidated, or any corporation resulting from any merger or consolidation to
which the Warrant Agent shall be a party, or any corporation succeeding to all
or substantially all of the corporate trust business of the Warrant Agent,
shall be the successor to the Warrant Agent hereunder without the execution or
filing of any paper or any further act on the part of any of the parties here-
to, provided that such corporation would be eligible for appointment as a
 
<PAGE>
                                      15



successor warrant agent under the provisions successor warrant agent under the
provisions of Section 20. In case at the time such successor to the Warrant
Agent shall succeed to the agency created by this Agreement, and in case at
that time any of the Warrant Certificates shall have been countersigned but
not delivered, any such successor to the Warrant Agent may adopt the counter-
signature of the predecessor Warrant Agent; and in case at that time any of
the Warrant Certificates shall not have been countersigned, any successor to
the Warrant Agent may countersign such Warrant Certificates either in the name
of the predecessor Warrant Agent or in the name of the successor to the War-
rant Agent; and in all such cases such Warrant Certificates shall have the
full force and effect provided in the Warrant Certificates and in this Agree-
ment.
 
 In case at any time the name of the Warrant Agent shall be changed and at
such time any of the Warrant Certificates shall have been countersigned but
not delivered, the Warrant Agent whose name has been changed may adopt the
countersignature under its prior name, and in case at that time any of the
Warrant Certificates shall not have been countersigned, the Warrant Agent may
countersign such Warrant Certificates either in its prior name or in its
changed name, and in all such cases such Warrant Certificates shall have the
full force and effect provided in the Warrant Certificates and in this Agree-
ment.
 
 Section 16. Warrant Agent. The Warrant Agent undertakes the duties and obli-
gations imposed by this Agreement upon the following terms and conditions, by
all of which the Company and the holders of Warrants, by their acceptance
thereof, shall be bound:
 
   (a) The statements contained herein and in the Warrant Certificates shall
  be taken as statements of the Company, and the Warrant Agent assumes no
  responsibility for the correctness of any of the same except such as de-
  scribe the Warrant Agent or action taken or to be taken by it. The Warrant
  Agent assumes no responsibility with respect to the distribution of the
  Warrant Certificates except as herein otherwise provided.
 
   (b) The Warrant Agent shall not be responsible for any failure of the
  Company to comply with any of the covenants contained in this Agreement or
  in the Warrant Certificates.
 
   (c) The Warrant Agent may consult at any time with counsel satisfactory
  to it (who may be counsel for the Company) and the Warrant Agent shall in-
  cur no liability or responsibility to the Company or to any holder of any
  Warrant Certificate in respect of any action taken, suffered or omitted by
  it hereunder in good faith and in accordance with the opinion or the ad-
  vice of such counsel.
 
<PAGE>
                                      16


 
   (d) The Warrant Agent shall incur no liability or responsibility to the
  Company or to any holder of any Warrant Certificate for any action taken
  in reliance on any Warrant Certificate, certificate of shares, notice,
  resolution, waiver, consent, order, certificate, or other paper, document
  or instrument believed by it in good faith to be genuine and to have been
  signed, sent or presented by the proper party or parties.
 
   (e) The Company agrees to pay to the Warrant Agent compensation for all
  services rendered by the Warrant Agent in the execution and performance of
  this Agreement at such rates as have been separately agreed to by the Com-
  pany and the Warrant Agent and to reimburse the Warrant Agent for all ex-
  penses, taxes and governmental charges and other charges of any kind and
  nature incurred by the Warrant Agent in the execution and performance of
  this Agreement. The Company shall indemnify the Warrant Agent and its
  agents and save each of them harmless against any and all losses, reason-
  able expenses, liabilities, including judgments, costs and counsel fees
  and the costs and expenses of investigating or defending any claim of such
  liability, for anything done or omitted by the Warrant Agent or its agents
  in the execution of and performance of its obligations under this Agree-
  ment except as a result of its negligence or bad faith. The Warrant Agent
  shall notify the Company promptly of any claim for which it may seek in-
  demnity; provided that failure by the Warrant Agent to so notify the Com-
  pany shall not relieve its obligations hereunder. The Company shall defend
  the claim and the Warrant Agent shall cooperate in the defense. The War-
  rant Agent may have separate counsel and the Company shall pay the reason-
  able fees and expenses of such counsel. The Company need not pay for any
  settlement made without its consent, which consent shall not be unreason-
  ably withheld.
 
   (f) The Warrant Agent shall be under no obligation to institute, appear
  in or defend any action, suit or legal proceeding or to take any other ac-
  tion likely to involve expense unless the Company or one or more regis-
  tered holders of Warrant Certificates shall furnish the Warrant Agent with
  security and indemnity reasonably satisfactory to it for any costs and ex-
  penses which may be incurred, but this provision shall not affect the
  power of the Warrant Agent to take such action as it may consider proper,
  whether with or without any such security or indemnity. All rights of ac-
  tion under this Agreement or under any of the Warrants may be enforced by
  the Warrant Agent without the possession of any of the Warrant Certifi-
  cates or the production thereof at any trial or other proceeding relative
  thereto, and any such action, suit or proceeding instituted by the Warrant
  Agent shall be brought in its name as Warrant Agent and any recovery of
  judgment shall be for the ratable benefit of the registered holders of the
  Warrants, as their respective rights or interests may appear.
 
<PAGE>
                                      17



 
   (g) The Warrant Agent, and any stockholder, director, officer or employee
  of it, may buy, sell or deal in any of the Warrants or other securities of
  the Company or become pecuniarily interested in any transaction in which
  the Company may be interested, or contract with or lend money to the Com-
  pany or otherwise act as fully and freely as though it were not Warrant
  Agent under this Agreement. Nothing herein shall preclude the Warrant
  Agent from acting in any other capacity for the Company or for any other
  legal entity.
 
   (h) The Warrant Agent shall act hereunder solely as agent for the Compa-
  ny, its duties shall be determined solely by the provisions hereof, and no
  implied covenants or obligations shall be read into this Agreement against
  the Warrant Agent. The Warrant Agent shall not be liable for anything
  which it may do or refrain from doing in connection with this Agreement
  except for its own negligence or bad faith.
 
   (i) The Warrant Agent shall not at any time be under any duty or respon-
  sibility to any holder of any Warrant Certificate to make or cause to be
  made any adjustment of the Exercise Price or Exercise Rate or other secu-
  rities or property deliverable as provided in this Agreement, or to deter-
  mine whether any facts exist which may require any of such adjustments, or
  with respect to the nature, accuracy, correctness or extent of any such
  adjustments, when made, or with respect to the method employed in making
  the same. The Warrant Agent shall not be accountable with respect to the
  validity or value or the kind or amount of any Warrant Shares or of any
  securities or property which may at any time be issued or delivered upon
  the exercise of any Warrant or with respect to whether any such Warrant
  Shares or other securities will when issued be validly issued and fully
  paid and nonassessable, and makes no representation with respect thereto.
 
   (j) In the absence of bad faith on its part, the Warrant Agent may con-
  clusively rely, as to the truth of the statements and the correctness of
  the opinions expressed therein, upon certificates or opinions furnished to
  the Warrant Agent and, if required by the terms thereof, conforming to the
  requirements of this Warrant Agreement. However, the Warrant Agent shall
  examine the certificates and opinions, if required by the terms thereof,
  to determine whether or not they conform to the requirements of this War-
  rant Agreement.
 
   (k) The Warrant Agent may rely and shall be fully protected in relying
  upon any document believed by it in good faith to be genuine and to have
  been signed or presented by the proper person. The Warrant Agent need not
  investigate any fact or matter stated in the documents.
 
   (l) The Warrant Agent may act through agents and shall not be responsible
  for the misconduct or negligence of any agent appointed and monitored in
  good faith and with due care.
 
<PAGE>

                                      18



 
   (m) The Company will perform, execute, acknowledge and deliver or cause
  to be performed, executed, acknowledged and delivered all such further
  acts, instruments and assurances as may reasonably be required by the War-
  rant Agent in order to enable it to carry out or perform its duties under
  this Agreement.
 
 Section 17. Change of Warrant Agent. The Warrant Agent may resign at any time
by so notifying the Company. If the Warrant Agent shall resign or become inca-
pable of acting as Warrant Agent, the Company shall appoint a successor to
such Warrant Agent. If the Company shall fail to make such appointment within
a period of 30 days after it has been notified in writing of such incapacity
or resignation by the Warrant Agent or by the registered holder of a Warrant
Certificate, then the registered holder of any Warrant Certificate may apply
to any court of competent jurisdiction for the appointment of a successor to
the Warrant Agent. Pending appointment of a successor to such Warrant Agent,
either by the Company or by such a court, the duties of the Warrant Agent
shall be carried out by the Company. The registered holders of a majority of
the unexercised Warrants shall be entitled at any time to remove the Warrant
Agent and appoint a successor to such Warrant Agent. Such successor to the
Warrant Agent need not be approved by the Company or the former Warrant Agent.
After appointment the successor to the Warrant Agent shall be vested with the
same powers, rights, duties and responsibilities as if it had been originally
named as Warrant Agent without further act or deed; but the former Warrant
Agent shall, after the payment of all outstanding amounts owed to it hereun-
der, deliver and transfer to the successor to the Warrant Agent any property
at the time held by it hereunder and execute and deliver any further assur-
ance, conveyance, act or deed necessary for the purpose. Failure to give any
notice provided for in this Section 17, however, or any defect therein, shall
not affect the legality or validity of the appointment of a successor to the
Warrant Agent. The provisions of Section 16 with respect to any Warrant Agent
shall survive such Warrant Agent's resignation or removal.
 
<PAGE>
                                      19


 
 Section 18. Notices to the Company and Warrant Agent. Any notice or demand
authorized by this Agreement to be given or made by the Warrant Agent or by
the registered holder of any Warrant Certificate to or on the Company shall be
sufficiently given or made when and if telecopied to the number indicated be-
low or deposited in the mail, first class or registered, postage prepaid, ad-
dressed (until another telecopy number or address is filed in writing by the
Company with the Warrant Agent), as follows:
 
      The Coastal Corporation
      Coastal Tower
      Nine Greenway Plaza
      Houston, Texas 77046-0995
      Attention: Corporate Secretary
      Telecopier No.: (713) 877-7071
 
 In case the Company shall fail to maintain such office or shall fail to give
such notice of any change in the location thereof, presentations may be made
and notices and demands may be served at the principal office of the Warrant
Agent.
 
 Any notice pursuant to this Agreement to be given by the Company or by the
registered holder(s) of any Warrant Certificate to the Warrant Agent shall be
sufficiently given when and if telecopied to the number indicated below or de-
posited in the mail, first class or registered, postage prepaid, addressed
(until another telecopy number or address is filed in writing by the Warrant
Agent with the Company) to the Warrant as follows:
 
      Attention: Corporate Trust Department
      Telecopier No.:
 
 Any notice to be mailed to a registered holder of Warrants shall be mailed to
each holder at its address as it appears on the Warrant Register maintained by
the Warrant Agent. Copies of any such communication shall also be mailed to
the Warrant Agent. The Warrant Agent shall furnish the Company promptly when
requested with a list of registered holders of Warrants for the purpose of
mailing any notice or communication to the registered holders of the Warrants
and at such other times as may be reasonably requested.
 
 Section 19. Supplements and Amendments. The Company and the Warrant Agent may
from time to time supplement or amend this Agreement without the approval of
any registered holders of Warrant Certificates in order to cure any ambiguity
or to correct or supplement any provision contained herein which may
 
<PAGE>

                                      20


 
be defective or inconsistent with any other provisions herein, or to make any
other provisions in regard to matters or questions arising hereunder which the
Company and the Warrant Agent may deem necessary or desirable and which shall
not, as evidenced by an opinion of counsel delivered to the Warrant Agent, in
any way adversely affect the interests of the holders of Warrant Certificates.
Any amendment or supplement to this Agreement that has an adverse effect on
the interests of holders shall require the written consent of registered hold-
ers of a majority of the then outstanding Warrants. However, the consent of
each registered holder of a Warrant affected shall be required for any amend-
ment pursuant to which the Exercise Price would be increased, the Exercise
Rate would be decreased or the period for exercise of the Warrants would be
shortened. The Warrant Agent shall be entitled to receive and, subject to Sec-
tion 16 shall be fully protected in relying upon an officers' certificate and
opinion of counsel as conclusive evidence that any such amendment or supple-
ment is authorized or permitted hereunder, that it is not inconsistent here-
with, and that it will be valid and binding upon the Company in accordance
with its terms. The Company may not sign any amendment or supplement until the
Company's board of directors approves it.
 
 Section 20. Successors. All the covenants and provisions of this Agreement by
or for the benefit of the Company or the Warrant Agent shall bind and inure to
the benefit of its respective successors and assigns hereunder.
 
 Section 21. Termination. This Agreement shall terminate at        p.m., Hous-
ton time, on           ,     . The provisions of Section 16 hereof regarding
compensation, reimbursement and indemnification shall survive such termina-
tion. Notwithstanding the foregoing, this Agreement shall not terminate until
the obligations of the Company with respect to the delivery of Warrant Shares
to any holder of Warrants who exercises such Warrants prior to       p.m., New
York time, on         ,      have been satisfied.
 
 Section 22. Governing Law. THIS AGREEMENT AND EACH WARRANT CERTIFICATE ISSUED
HEREUNDER SHALL BE DEEMED TO BE A CONTRACT MADE UNDER THE LAWS OF THE STATE OF
NEW YORK AND FOR ALL PURPOSES SHALL BE CONSTRUED IN ACCORDANCE WITH THE INTER-
NAL LAWS OF SAID STATE.
 
 Section 23. Benefits of This Agreement. Nothing in this Agreement shall be
construed to give to any person or corporation other than the Company, the
Warrant Agent and the registered holders of the Warrant Certificates and War-
rant
 
<PAGE>
                                      21

 
Shares any legal or equitable right, remedy or claim under this Agreement; but
this Agreement shall be for the sole and exclusive benefit of the Company, the
Warrant Agent and the registered holders of the Warrant Certificates and War-
rant Shares.
 
 Section 24. Severability. The provisions of this Warrant Agreement are sever-
able, and if any clause or provision shall be held invalid, illegal or unen-
forceable in whole or in part in any jurisdiction, then such invalidity or un-
enforceability shall affect in that jurisdiction only such clause or provi-
sion, or part thereof, and shall not in any manner affect such clause or pro-
vision in any other jurisdiction or any other clause or provision of this War-
rant Agreement in any jurisdiction.
 
 Section 25. Counterparts. This Agreement may be executed in any number of
counterparts and each of such counterparts shall for all purposes be deemed to
be an original, and all such counterparts shall together constitute but one
and the same instrument.
 
 Section 26. Headings. The headings in this Agreement are for the convenience
of reference only and shall not limit or otherwise affect the meaning of any
provision hereof.
 
                           [Signature Page Follows]
 
<PAGE>

                                      22


 
 IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be duly
executed, as of the day and year first above written.
 
                                The Coastal Corporation
 
                                By: ___________________________________________
                                    Name:
                                    Title:
 
                                   ___________________________________________,
                                   as Warrant Agent
 
                                By: ___________________________________________
                                    Name:
                                    Title:
 
<PAGE>
 
                                                                      EXHIBIT A
 
                         [Form of Warrant Certificate]
 
                                    [Face]
 
No.                                                                    Warrants
 
                              Warrant Certificate
 
                            THE COASTAL CORPORATION
 
                                                                     CUSIP No.:
 
 This Warrant Certificate certifies that          , or registered assigns, is
the registered holder of Warrants expiring          ,      (the "Warrants") to
purchase Common Stock, par value $.33 1/3 per share (the "Common Stock"), of
THE COASTAL CORPORATION, a Delaware corporation (the "Company"). Each Warrant
entitles the registered holder upon exercise [from      ,      , until] on or
before       p.m. Houston time on      ,     , to receive from the Company one
fully paid and nonassessable share of Common Stock (each such share, a "War-
rant Share") at the exercise price of $      per share (the "Exercise Price")
payable (i) in cash or (ii) by certified or official bank check. The Warrants
represented by this Warrant Certificate may be exercised upon surrender of
this Warrant Certificate and payment of the Exercise Price at the office of
the Warrant Agent designated for such purpose, but only subject to the condi-
tions set forth herein and in the Warrant Agreement referred to on the reverse
hereof.
 
 The number of Warrant Shares issuable upon exercise of the Warrants is sub-
ject to adjustment upon the occurrence of certain events set forth in the War-
rant Agreement.
 
 No Warrant may be exercised after       p.m., New York time, on      ,     ,
and to the extent not exercised by such time such Warrants shall expire.
 
 Reference is hereby made to the further provisions of this Warrant Certifi-
cate set forth on the reverse hereof and such further provisions shall for all
purposes have the same effect as though fully set forth at this place.
<PAGE>

                                     A-2


 
 This Warrant Certificate shall not be valid unless countersigned by the War-
rant Agent, as such term is used in the Warrant Agreement.
 
 This Warrant Certificate shall be governed by and construed in accordance
with the internal laws of the State of New York.
 
 IN WITNESS WHEREOF, The Coastal Corporation has caused this Warrant Certifi-
cate to be signed by its duly authorized officer.
 
Dated:             , 199
                                The Coastal Corporation
 
                                By:  __________________________________________
                                    Title:
 
Countersigned:
 
 as Warrant Agent
 
By: _________________________________
  Authorized Signature
 
<PAGE>

                                      A-3



 
                         [Form of Warrant Certificate]
 
[Reverse]
 
 The Warrants evidenced by this Warrant Certificate are part of a duly autho-
rized issue of Warrants expiring      ,     , entitling the holder on exercise
to receive shares of Common Stock, par value $.33 1/3 per share, of the Com-
pany (the "Common Stock"), and are issued or to be issued pursuant to a War-
rant Agreement dated as of        ,      (the "Warrant Agreement"), between
the Company and               , as Warrant Agent (the "Warrant Agent"), which
Warrant Agreement is hereby incorporated by reference in and made a part of
this instrument and is hereby referred to for a description of the rights,
limitation of rights, obligations, duties and immunities thereunder of the
Company, the Warrant Agent and the holders (the words "holders" or "holder"
meaning the registered holders or registered holder) of the Warrants. A copy
of the Warrant Agreement may be obtained by the holder hereof upon written re-
quest to the Company. Capitalized terms used herein without definition shall
have the meanings ascribed to them in the Warrant Agreement.
 
 Warrants may be exercised at any time on or (after       and) before
p.m., New York time, on         ,     . The holder of Warrants evidenced by
this Warrant Certificate may exercise them by surrendering this Warrant Cer-
tificate, with the form of election to purchase set forth hereon properly com-
pleted and executed, together with payment of the Exercise Price (i) in cash
or (ii) by certified or official bank check. In the event that upon any exer-
cise of Warrants evidenced hereby the number of Warrants exercised shall be
less than the total number of Warrants evidenced hereby, there shall be issued
to the holder hereof or his assignee a new Warrant Certificate evidencing the
number of Warrants not exercised. No adjustment shall be made for any divi-
dends on any Common Stock issuable upon exercise of this Warrant.
 
 The Warrant Agreement provides that upon the occurrence of certain events the
number of shares of Common Stock issuable upon the exercise of each Warrant
shall be adjusted. No fractions of a share of Common Stock will be issued upon
the exercise of any Warrant, but the Company will pay the cash value thereof
determined as provided in the Warrant Agreement.
 
 Warrant Certificates, when surrendered at the office of the Warrant Agent by
the registered holder thereof in person or by legal representative or attorney
duly authorized in writing, may be exchanged, in the manner and subject to the
limi-
 
<PAGE>

                                     A-4


 
tations provided in the Warrant Agreement, but without payment of any service
charge, for another Warrant Certificate or Warrant Certificates of like tenor
evidencing in the aggregate a like number of Warrants.
 
 Upon due presentation for registration of transfer of this Warrant Certifi-
cate at the office of the Warrant Agent a new Certificate or Warrant Certifi-
cates of like tenor and evidencing in the aggregate a like number of Warrants
shall be issued to the transferee(s) in exchange for this Warrant Certificate,
subject to the limitations provided in the Warrant Agreement, without charge
except for any tax or other governmental charge imposed in connection there-
with.
 
 The Company and the Warrant Agent may deem and treat the registered holder(s)
hereon as the absolute owner(s) of this Warrant Certificate (notwithstanding
any notation of ownership or other writing hereon made by anyone), for the
purpose of any exercise hereof, of any distribution to the holder(s) hereof,
and for all other purposes, and the Company and the Warrant Agent shall not be
affected by any notice to the contrary. Neither the Warrants nor this Warrant
Certificate entitles any holder hereof to any rights of a stockholder of the
Company.
 
<PAGE>

                                      A-5



 
                         Form of Election to Purchase
 
                   (To Be Executed Upon Exercise Of Warrant)
 
 The undersigned hereby irrevocably elects to exercise      Warrants contain-
ing the right, represented by this Warrant Certificate, to receive
shares of Common Stock and herewith (check item) tenders payment for such
shares to the order of The Coastal Corporation in the amount of $     per
share of Common Stock in accordance with the terms hereof, as follows:
 
   [_] $         in cash or by certified or official bank check to the order
  of The Coastal Corporation; or
 
  The undersigned requests that a certificate for such shares be registered
  in the name of            , whose address is                     , and
  that such shares be delivered to        , whose address is
                            .
 
   If said numbers of shares is less than all of the shares of Common Stock
  purchasable hereunder, the undersigned requests that a new Warrant Certif-
  icate for           Warrants representing the remaining balance of such
  Warrants be registered in the name of                      , whose address
  is                                   , and that such Warrant Certificate
  be delivered to                         , whose address is
                            .
 
                                _______________________________________________
                                Signature
 
                                Date: _________________________________________
 
                                _______________________________________________
                                             Signature Guaranteed
                                Participant in a recognized Signature
                                Guarantee Medallion Program (or other
                                signature guarantor program reasonably
                                acceptable to the Warrant Agent)
 
<PAGE>
                                      A-6



 
                                ASSIGNMENT FORM
 
 To assign this Warrant, fill in the form below: (I) or (we) assign and trans-
fer this Warrant to:
 
- --------------------------------------------------------------------------------
                 (INSERT ASSIGNEE'S SOC. SEC. OR TAX I.D. NO.)
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
             (PRINT OR TYPE ASSIGNEE'S NAME, ADDRESS AND ZIP CODE)
 
and irrevocably appoint_____________________to transfer this Warrant on the
books of the Company. The agent may substitute another to act for him.
- --------------------------------------------------------------------------------
 
Dated: _____________________ Your Signature: __________________________________
                                     (SIGN EXACTLY AS NAME APPEARS ON THE FACE
                                                  OF THIS WARRANT)
                                     __________________________________________
                                                Signature Guaranteed
                                     Participant in a recognized Signature
                                     Guarantee Medallion Program (or other
                                     signature guarantor program reasonably
                                     acceptable to the Warrant Agent)
 

<PAGE>
 
                                          January 20, 1998
 
The Coastal Corporation
Coastal Tower
Nine Greenway Plaza
Houston, Texas 77046-0995
 
Gentlemen:
 
  I have acted as counsel to The Coastal Corporation, a Delaware corporation
(the "Company"), in connection with the offering by the Company of up to $400
million aggregate public offering price of: (i) unsecured senior debt
securities (the "Senior Debt Securities"), (ii) unsecured subordinated debt
securities (the "Subordinated Debt Securities" and, together with the Senior
Debt Securities, the "Debt Securities"), which may be convertible into shares
of Common Stock, par value 33 1/3 cents per share, of the Company (the "Common
Stock"), (iii) shares of its Preferred Stock, par value 33 1/3 cents per share
(the "Preferred Stock"), which may be convertible into shares of Common Stock
or exchangeable for Debt Securities, (iv) shares of its Common Stock and/or
(v) warrants to purchase shares of Common Stock (the "Common Stock Warrants")
pursuant to a registration statement on Form S-3 (the "Registration
Statement"), filed by the Company with the Securities and Exchange Commission
under the Securities Act of 1933, as amended (the "Act"). The Debt Securities,
the Common Stock, the Preferred Stock and the Common Stock Warrants are
referred to as the "Securities" and individually as a "Security."
 
  The Senior Debt Securities are proposed to be issued under an indenture (the
"Senior Indenture") to be executed between the Company and a trustee to be
selected by the Company. The Subordinated Debt Securities are proposed to be
issued under an indenture (the "Subordinated Indenture") to be executed
between the Company and a trustee to be selected by the Company. The Common
Stock Warrants are proposed to be issued under a warrant agreement (the
"Warrant Agreement") to be executed between the Company and a bank or trust
company as Warrant Agent to be selected by the Company. In this connection, I
have examined such corporate proceedings of the Company and I have also
examined such statutes, corporate records and other instruments and documents
which I have deemed it necessary to examine for the purposes of this opinion.
 
  Based on the foregoing, I am of the opinion that:
 
  1. The Company has been duly organized and is validly existing under the
     laws of the State of Delaware.
 
  2. With respect to shares of Common Stock, when certificates representing
     the shares of Common Stock have been duly executed, countersigned,
     registered and delivered either (a) in accordance with the applicable
     definitive purchase, underwriting or similar agreement approved by the
     Board of Directors or the Executive Committee of the Board of Directors
     of the Company (the "Board") upon payment of the consideration therefor
     (not less than the par value of the Common Stock) provided for therein,
     or (b) upon conversion, exchange or exercise of any other Security
     (including the Common Stock Warrants) in accordance with the terms of
     such Security or the instrument governing such Security providing for
     such conversion, exchange or exercise as approved by the Board, for the
     consideration approved by the Board (not less than the par value of the
     Common Stock), the shares of Common Stock will be duly authorized,
     validly issued, fully paid and nonassessable.
 
  3. With respect to shares of Preferred Stock, when certificates
     representing the shares of Preferred Stock have been duly executed,
     countersigned, registered and delivered either (a) in accordance with
     the applicable definitive purchase, underwriting or similar agreement
     approved by the Board upon payment of the consideration therefor (not
     less than the par value of the Preferred Stock) provided for therein, or
     (b) upon conversion, exchange or exercise of any other Security in
     accordance with the terms of such Security or the instrument governing
     such Security providing for such conversion, exchange or exercise as
     approved by the Board, for the consideration approved by the Board (not
     less than the par
<PAGE>
 
     value of the Preferred Stock), the shares of Preferred Stock will be
     duly authorized, validly issued, fully paid and nonassessable.
 
  4. With respect to the Senior Debt Securities to be issued under the Senior
     Indenture, when (i) the Senior Indenture has been duly executed by the
     Company and the Trustee and has been duly qualified under the Trust
     Indenture Act of 1939, as amended; (ii) the Board has taken all
     necessary corporate action to approve the issuance and terms of such
     Senior Debt Securities, the terms of the offering thereof and related
     matters; and (iii) such Senior Debt Securities have been duly executed,
     authenticated, issued and delivered in accordance with the provisions of
     the Senior Indenture and in accordance with the applicable definitive
     purchase, underwriting or similar agreement approved by the Board upon
     payment of the consideration therefor provided for therein, such Debt
     Securities will be legally issued and will constitute valid and binding
     obligations of the Company, enforceable against the Company in
     accordance with their terms, except as such enforcement is subject to
     any applicable bankruptcy, insolvency, reorganization, fraudulent
     transfer or other law relating to or affecting creditors' rights
     generally and general principles of equity and will be entitled to the
     benefits of the Senior Indenture and except that the waiver as to usury
     in the Senior Indenture may be unenforceable.
 
  5. With respect to the Subordinated Debt Securities to be issued under the
     Subordinated Indenture, when (i) the Subordinated Indenture has been
     duly executed by the Company and the Trustee and has been duly qualified
     under the Trust Indenture Act of 1939, as amended; (ii) the Board has
     taken all necessary corporate action to approve the issuance and terms
     of such Subordinated Debt Securities, the terms of the offering thereof
     and related matters; and (iii) such Subordinated Debt Securities have
     been duly executed, authenticated, issued and delivered in accordance
     with the provisions of the Subordinated Indenture and in accordance with
     the applicable definitive purchase, underwriting or similar agreement
     approved by the Board upon payment of the consideration therefor
     provided for therein, such Subordinated Debt Securities will be legally
     issued and will constitute valid and binding obligations of the Company,
     enforceable against the Company in accordance with their terms, except
     as such enforcement is subject to any applicable bankruptcy, insolvency,
     reorganization, fraudulent transfer or other law relating to or
     affecting creditors' rights generally and general principles of equity
     and will be entitled to the benefits of the Subordinated Indenture and
     except that the waiver as to usury in the Subordinated Indenture may be
     unenforceable.
 
  6. With respect to the Common Stock Warrants, when (i) the Board has taken
     all necessary corporate action to approve the issuance of such Common
     Stock Warrants, the terms of the offering thereof and related matters;
     and (ii) such Common Stock Warrants have been duly executed, issued and
     delivered in accordance with the provisions of the Warrant Agreement and
     in accordance with the applicable definitive purchase, underwriting or
     similar agreement, if any, approved by the Board and upon payment of any
     consideration therefor provided for therein, such Common Stock Warrants
     will be legally issued and will constitute valid and binding obligations
     of the Company, enforceable against the Company in accordance with their
     terms, except as such enforcement is subject to any applicable
     bankruptcy, insolvency, reorganization, fraudulent transfer or other law
     relating to or affecting creditors' rights generally and general
     principles of equity and will be entitled to the benefits of the Warrant
     Agreement.
 
  I hereby consent to the filing of this opinion as an exhibit to the
Registration Statement and to the reference to the undersigned under the
caption therein entitled "Legal Matters."
 
                                        Very truly yours,
 
                                        /s/ Austin M. O'Toole
 
                                        Austin M. O'Toole

<PAGE>
 
                                                                   EXHIBIT 23.1
 
                         INDEPENDENT AUDITORS' CONSENT
 
  We consent to the incorporation by reference in this Registration Statement
of The Coastal Corporation on Form S-3 of our report dated January 31, 1997,
appearing in the Annual Report on Form 10-K of The Coastal Corporation for the
year ended December 31, 1996, and to the reference to us under the heading
"Experts" in the Prospectus, which is a part of this Registration Statement.
 
DELOITTE & TOUCHE LLP
 
Houston, Texas
January 20, 1998

<PAGE>
 
________________________________________________________________________________
________________________________________________________________________________



                      SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, D.C. 20549
                       _________________________________

                                   FORM T-1


        STATEMENT OF ELIGIBILITY UNDER THE TRUST INDENTURE ACT OF 1939
                 OF A CORPORATION DESIGNATED TO ACT AS TRUSTEE


   Check if an Application to Determine Eligibility of a trustee Pursuant to
                              Section 305(b) ____


                         HARRIS TRUST AND SAVINGS BANK
              (EXACT NAME OF TRUSTEE AS SPECIFIED IN ITS CHARTER)

                     Illinois                                  36-1194448
(JURISDICTION OF INCORPORATION OR ORGANIZATION             (I.R.S. EMPLOYER
          IF NOT A U.S. NATIONAL BANK)                     IDENTIFICATION NO.)

            111 West Monroe Street
              Chicago, Illinois                                  60603
  (ADDRESS OF PRINCIPAL EXECUTIVE OFFICES)                    (ZIP CODE)

                              Mark F. McLaughlin
                         Harris Trust and Savings Bank
                   111 West Monroe Street, Chicago, Illinois
                                (312) 461-2531
           (NAME, ADDRESS AND TELEPHONE NUMBER OF AGENT FOR SERVICE)

                     ____________________________________


                            THE COASTAL CORPORATION
              (EXACT NAME OF OBLIGOR AS SPECIFIED IN ITS CHARTER)

           DELAWARE                                           74-1734212
(STATE OR OTHER JURISDICTION OF                           (I.R.S. EMPLOYER
INCORPORATION OR ORGANIZATION)                            IDENTIFICATION NUMBER)



                                 Coastal Tower
                              Nine Greenway Plaza
                          Houston, Texas  77046-0995

                    ______________________________________


                             _____ NOTES DUE_____
                      (TITLE OF THE INDENTURE SECURITIES)

________________________________________________________________________________
________________________________________________________________________________
<PAGE>
 
                                     - 2 -
1.   GENERAL INFORMATION.

     Furnish the following information as to the Trustee:

     (a) Name and address of each examining or supervising authority to which it
         is subject.

             Commissioner of Banks and Trust Companies, State of Illinois,
             Springfield, Illinois; Chicago Clearing House Association, 164 West
             Jackson Boulevard, Chicago, Illinois; Federal Deposit Insurance
             Corporation, Washington, D.C.; The Board of Governors of the
             Federal Reserve System, Washington, D.C.

     (b) Whether it is authorized to exercise corporate trust powers.

             Harris Trust and Savings Bank is authorized to exercise corporate
             trust powers.

2.   AFFILIATIONS WITH OBLIGOR.
 
     If the Obligor is an affiliate of the Trustee, describe each such
     affiliation.

             The Obligor is not an affiliate of the Trustee.

3. through 15.

     NO RESPONSE NECESSARY

16.  LIST OF EXHIBITS.

     1.  A copy of the articles of association of the Trustee is now in effect
         which includes the authority of the trustee to commence business and to
         exercise corporate trust powers.

     A copy of the Certificate of Merger dated April 1, 1972 between Harris
         Trust and Savings Bank, HTS Bank and Harris Bankcorp, Inc. which
         constitutes the articles of association of the Trustee as now in effect
         and includes the authority of the Trustee to commence business and to
         exercise corporate trust powers was filed in connection with the
         Registration Statement of Louisville Gas and Electric Company, File No.
         2-44295, and is incorporated herein by reference.

     2. A copy of the existing by-laws of the Trustee.

     A copy of the existing by-laws of the Trustee was filed in connection with
         the Registration Statement of C-Cube Microsystems Inc., File No. 33-
         97166, and is incorporated herein by reference.

     3.  The consents of the Trustee required by Section 321(b) of the Act.

     (included as Exhibit A on page 3 of this statement)

     4.  A copy of the latest report of condition of the Trustee published
         pursuant to law or the requirements of its supervising or examining
         authority.

         (included as Exhibit B on page 4 of this statement)

                                   SIGNATURE

Pursuant to the requirements of the Trust Indenture Act of 1939, the Trustee,
HARRIS TRUST AND SAVINGS BANK, a corporation organized and existing under the
laws of the State of Illinois, has duly caused this statement of eligibility to
be signed on its behalf by the undersigned, thereunto duly authorized, all in
the City of Chicago, and State of Illinois, on the 13th day of January, 1998.

                         HARRIS TRUST AND SAVINGS BANK

                     By: /s/ AMY ROBERTS
                        -----------------------------------
                                    Amy Roberts
                                  Vice President
<PAGE>
 
                                      -3-
                                                                       EXHIBIT A


The consents of the trustee required by Section 321(b) of the Act.

Harris Trust and Savings Bank, as the Trustee herein named, hereby consents that
reports of examinations of said trustee by Federal and State authorities may be
furnished by such authorities to the Securities and Exchange Commission upon
request therefor.

                         HARRIS TRUST AND SAVINGS BANK


                     By: /s/ AMY ROBERTS
                        -----------------------------------
                                    Amy Roberts
                                  Vice President
<PAGE>
 
                                      -4-
                                                                       EXHIBIT B

Attached is a true and correct copy of the statement of condition of Harris
Trust and Savings Bank as of September 30, 1997, as published in accordance with
a call made by the State Banking Authority and by the Federal Reserve Bank of
the Seventh Reserve District.

                        [HARRIS BANK LOGO APPEARS HERE]

                         Harris Trust and Savings Bank
                            111 West Monroe Street
                           Chicago, Illinois  60603

of Chicago, Illinois, And Foreign and Domestic Subsidiaries, at the close of
business on September 30, 1997, a state banking institution organized and
operating under the banking laws of this State and a member of the Federal
Reserve System. Published in accordance with a call made by the Commissioner of
Banks and Trust Companies of the State of Illinois and by the Federal Reserve
Bank of this District.

                        Bank's Transit Number 71000288

<TABLE>
<CAPTION>
                                                                                                THOUSANDS
                                    ASSETS                                                     OF DOLLARS
<S>                                                                                   <C>           <C> 
Cash and balances due from depository institutions:
            Non-interest bearing balances and currency and coin...............                       $ 1,188,709
            Interest bearing balances.........................................                       $   550,173
Securities:...................................................................
a.  Held-to-maturity securities                                                                      $         0
b.  Available-for-sale securities                                                                    $ 3,685,983
Federal funds sold and securities purchased under agreements to resell                               $   396,400
Loans and lease financing receivables:
            Loans and leases, net of unearned income..........................        $ 8,401,048
            LESS:  Allowance for loan and lease losses........................        $   107,180
                                                                                      -----------
 
            Loans and leases, net of unearned income, allowance, and reserve
            (item 4.a minus 4.b)..............................................                       $ 8,293,868
Assets held in trading accounts...............................................                       $    98,368
Premises and fixed assets (including capitalized leases)......................                       $   213,612
Other real estate owned.......................................................                       $       778
Investments in unconsolidated subsidiaries and associated companies...........                       $        86
Customer's liability to this bank on acceptances outstanding..................                       $    41,205
Intangible assets.............................................................                       $   283,839
Other assets..................................................................                       $   603,886
                                                                                                     -----------
 
TOTAL ASSETS                                                                                         $15,356,907
                                                                                                     ===========
</TABLE>
<PAGE>
 
                                      -5-


<TABLE>
<CAPTION>
 

                                   LIABILITIES
<S>                                                                                    <C>           <C> 
Deposits:
       In domestic offices....................................................                       $ 8,374,055
            Non-interest bearing..............................................         $2,770,029
            Interest bearing..................................................         $5,604,026
       In foreign offices, Edge and Agreement subsidiaries, and IBF's.........                       $ 1,991,659
            Non-interest bearing..............................................         $   27,364
            Interest bearing..................................................         $1,964,295
Federal funds purchased and securities sold under agreements to repurchase in
 domestic offices of the bank and of its Edge and Agreement subsidiaries, and
 in IBF's:
       Federal funds purchased & securites sold under agreements to repurchase                       $ 2,549,328
Trading Liabilities                                                                                       62,186
Other borrowed money:.........................................................
a.  With remaining maturity of one year or less                                                      $   630,911
b.  With remaining maturity of more than one year                                                    $         0
Bank's liability on acceptances executed and outstanding                                             $    41,205
Subordinated notes and debentures.............................................                       $   325,000
Other liabilities.............................................................                       $   132,188
                                                                                                     -----------
TOTAL LIABILITIES                                                                                    $14,106,532
                                                                                                     ===========
 
                                EQUITY CAPITAL
Common stock..................................................................                       $   100,000
Surplus.......................................................................                       $   600,853
a.  Undivided profits and capital reserves....................................                       $   553,257
b.  Net unrealized holding gains (losses) on available-for-sale securities                               ($3,735)
                                                                                                     ----------- 
 
TOTAL EQUITY CAPITAL                                                                                 $ 1,250,375
                                                                                                     =========== 
Total liabilities, limited-life preferred stock, and equity capital...........                       $15,356,907
                                                                                                     ===========
</TABLE>

     I, Pamela Piarowski, Vice President of the above-named bank, do hereby
declare that this Report of Condition has been prepared in conformance with the
instructions issued by the Board of Governors of the Federal Reserve System and
is true to the best of my knowledge and belief.

                               PAMELA PIAROWSKI
                                   10/29/97

     We, the undersigned directors, attest to the correctness of this Report of
Condition and declare that it has been examined by us and, to the best of our
knowledge and belief, has been prepared in conformance with the instructions
issued by the Board of Governors of the Federal Reserve System and the
Commissioner of Banks and Trust Companies of the State of Illinois and is true
and correct.

          EDWARD W. LYMAN,
          ALAN G. McNALLY,
          JAMES J. GLASSER
                                                                      Directors.


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