ENERGEN CORP
S-3, 1997-12-24
NATURAL GAS DISTRIBUTION
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<PAGE>
 
   AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON DECEMBER 24, 1997
                                                     REGISTRATION NO. 333-
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
                      SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, D.C. 20549
 
                                ---------------
                                   FORM S-3
                            REGISTRATION STATEMENT
                                     UNDER
                          THE SECURITIES ACT OF 1933
 
                                ---------------
 
                              ENERGEN CORPORATION
            (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)
 
                                ---------------
 
              ALABAMA                               63-0757759
  (STATE OR OTHER JURISDICTION OF      (I.R.S. EMPLOYER IDENTIFICATION NO.)
   INCORPORATION OR ORGANIZATION)
 
                            2101 SIXTH AVENUE NORTH
                           BIRMINGHAM, ALABAMA 35203
                                (205) 326-2700
  (ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER, INCLUDING AREA CODE, OF
                   REGISTRANT'S PRINCIPAL EXECUTIVE OFFICES)
 
                                ---------------
                            J. DAVID WOODRUFF, JR.
                              ENERGEN CORPORATION
                            2101 SIXTH AVENUE NORTH
                           BIRMINGHAM, ALABAMA 35203
                                (205) 326-2700
 (NAME, ADDRESS, INCLUDING ZIP CODE AND TELEPHONE NUMBER, INCLUDING AREA CODE,
                                      OF
                              AGENT FOR SERVICE)
 
                                ---------------
 
     THE COMMISSION IS REQUESTED TO SEND COPIES OF ALL COMMUNICATIONS TO:
 
           JOHN K. MOLEN                           DAVID P. FALCK
   BRADLEY ARANT ROSE & WHITE LLP        WINTHROP, STIMSON, PUTNAM & ROBERTS
    2001 PARK PLACE, SUITE 1400                ONE BATTERY PARK PLAZA
     BIRMINGHAM, ALABAMA 35203              NEW YORK, NEW YORK 10004-1490
           (205) 521-8238                          (212) 858-1438
 
                                ---------------
 
  APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC: From time
to time after this Registration Statement becomes effective as the Registrant
may determine.
 
  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, 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. [X]
 
                        CALCULATION OF REGISTRATION FEE
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
<TABLE>
<CAPTION>
                                        PROPOSED MAXIMUM
        TITLE OF EACH CLASS OF         AGGREGATE OFFERING       AMOUNT OF
     SECURITIES TO BE REGISTERED            PRICE(1)      REGISTRATION FEE(2)(3)
- --------------------------------------------------------------------------------
<S>                                    <C>                <C>
Debt Securities; Common Stock........     $400,000,000           $108,704
</TABLE>
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
(1) Estimated solely for purposes of computing the registration fee.
(2) The registration fee has been calculated in accordance with Rule 457(o)
    under the Securities Act of 1933, as amended, and reflects the offering
    price rather than the principal amount of any Debt Securities issued at a
    discount.
(3) Pursuant to Rule 429 under the Securities Act of 1933, as amended,
    $31,512,500 of the securities being registered are being carried forward
    from a prior registration statement on Form S-3 (Registration No. 333-
    11239). The filing fee associated with such securities that was previously
    paid with the earlier registration statement was $10,866.
 
                                ---------------
  Pursuant to Rule 429 under the Securities Act of 1933, as amended, the
Prospectus contained herein also relates to securities of the Registrant
previously registered on Form S-3 (Registration No. 333-11239).
 
  THE REGISTRANT HEREBY AMENDS THIS REGISTRATION STATEMENT ON SUCH 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 THE REGISTRATION STATEMENT SHALL BECOME
EFFECTIVE ON SUCH DATE AS THE COMMISSION ACTING PURSUANT TO SAID SECTION 8(A),
MAY DETERMINE.
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
<PAGE>
 
                             SUBJECT TO COMPLETION
                   PRELIMINARY PROSPECTUS DATED        , 1998
 
PROSPECTUS
 
                                  $400,000,000
 
                              ENERGEN CORPORATION
 
                                DEBT SECURITIES
                                  COMMON STOCK
 
  Energen Corporation (the "Corporation") may offer from time to time up to an
aggregate amount of $400,000,000 (or the equivalent thereof if any of the
securities offered hereby are denominated in a currency, currency unit or
composite currency other than the U.S. dollar) of (i) its notes, debentures or
other evidences of unsecured indebtedness (the "Debt Securities") in one or
more currencies on terms to be determined at the time of sale and (ii) shares
of its common stock, par value $.01 per share (the "Common Stock"), on terms to
be determined at the time of sale. The Common Stock is referred to herein as
the "Equity Securities," and the Debt Securities and the Equity Securities are
collectively referred to herein as the "Offered Securities." The Offered
Securities may be sold for U.S. Dollars, foreign currencies or foreign currency
units, and the principal of or any interest on the Debt Securities may be
payable in U.S. Dollars, foreign currencies or foreign currency units. The Debt
Securities will rank equally with all other outstanding unsecured senior
indebtedness of the Corporation. The Debt Securities may be issued in one or
more series with the same or various maturities, at par or with an original
issue discount. The Debt Securities of any series may be in registered or
bearer form and may be represented by a single global security registered in
the name of a securities depositary.
 
  When Debt Securities are offered, a supplement to this Prospectus (the
"Prospectus Supplement") will set forth the specific terms of such Debt
Securities, including, where applicable, the specific designation, aggregate
principal amount, authorized denominations, currency or currency unit of
denomination and payment, maturity, interest rate (which may be fixed or
variable) and time of payment of interest, if any, any terms for redemption
(which either may be at the option of the Corporation or the holder), any terms
for sinking fund payments, and information about any listing on a securities
exchange of such Debt Securities. When Equity Securities are offered, a
Prospectus Supplement will set forth the aggregate number of shares offered.
Any Prospectus Supplement will also set forth the initial public offering
price, the net proceeds to the Corporation and other specific terms of the
Offered Securities.
 
  The Offered Securities may be sold to or through underwriters, dealers or
agents, or directly to purchasers. If any agents of the Corporation or any
underwriters are involved in the sale of the Offered Securities, their names,
and any applicable fee, commission or discount arrangements with them will be
set forth in any applicable Prospectus Supplement. See "Plan of Distribution."
No Offered Securities may be sold without delivery of a Prospectus Supplement
describing such series or issue of Offered Securities and the method and the
terms thereof.
 
THESE  SECURITIES HAVE NOT BEEN APPROVED  OR DISAPPROVED BY THE SECURITIES  AND
 EXCHANGE  COMMISSION   OR  ANY  STATE  SECURITIES  COMMISSION  NOR   HAS  THE
  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.
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+THE 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 A +
+SOLICITATION OF AN OFFER TO BUY NOR SHALL THERE BE ANY SALE OF THESE          +
+SECURITIES IN ANY JURISDICTION IN WHICH SUCH OFFER, SOLICITATION OR SALE      +
+WOULD BE UNLAWFUL PRIOR TO REGISTRATION OR QUALIFICATION UNDER THE SECURITIES +
+LAWS OF ANY SUCH JURISDICTION.                                                +
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

<PAGE>
 
                             AVAILABLE INFORMATION
 
  The Corporation is subject to the information requirements of the Securities
Exchange Act of 1934, as amended (the "Exchange Act"), and in accordance
therewith, files reports and other information with the Securities and
Exchange Commission (the "Commission"). Reports, proxy and information
statements and other information filed by the Corporation can be inspected and
copied at the public reference facilities maintained by the Commission at 450
Fifth Street, N.W., Washington, D.C. 20549 and at the Commission's regional
offices at 7 World Trade Center, Suite 1300, New York, New York 10048 and 500
West Madison Street, Suite 1400, Chicago, Illinois 60661-2511. Copies of such
material also can be obtained at prescribed rates from the Public Reference
Section of the Commission at its principal office at 450 Fifth Street, N.W.,
Washington, D.C. 20549. The Commission also maintains a web site
(http://www.sec.gov) that contains reports, proxy and information statements
and other information regarding reporting companies, including the
Corporation. The shares of Common Stock of the Corporation are listed on the
New York Stock Exchange, Inc., 20 Broad Street, New York, New York 10005.
Reports, proxy and information statements and other information concerning the
Corporation can be inspected at the offices of that exchange.
 
  The Corporation has filed a Registration Statement on Form S-3 (herein,
together with all exhibits and amendments thereto, called the "Registration
Statement") with the Commission under the Securities Act of 1933, as amended
(the "Securities Act"), with respect to the Offered Securities. This
Prospectus does not contain all of the information included in the
Registration Statement and the exhibits and schedules thereto. For further
information with respect to the Corporation and the Offered Securities,
reference is hereby made to the Registration Statement and the exhibits and
schedules thereto. The registration statement may be inspected without charge
at the offices of the Commission at 450 Fifth Street, N.W., Washington, D.C.
20549, and copies thereof may be obtained from the Public Reference Section of
the Commission at such address at prescribed rates.
 
                INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE
 
  The following documents filed by the Corporation with the Commission are
incorporated by reference in the Prospectus:
 
    (a) The Corporation's Annual Report on Form 10-K for the year ended
  September 30, 1997 filed pursuant to Section 13(a) of the Exchange Act; and
 
    (b) The description of the Corporation's preferred stock purchase rights
  contained in, and the Rights Agreement filed as an exhibit to, the
  Corporation's Registration Statement on Form 8-A, as amended, File No. 1-
  7810, dated August 8, 1988.
 
  All documents filed by the Corporation pursuant to Sections 13(a), 13(c), 14
or 15(d) of the Exchange Act subsequent to 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 in this Prospectus and to be a
part hereof from the date of filing such documents. Any statement contained in
a document incorporated or deemed to be incorporated by reference herein 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 which also is or is deemed to be incorporated by reference
herein modifies or replaces such statement. Any statement so modified or
superseded shall not be deemed, except as so modified or superseded, to
constitute a part of this Prospectus.
 
  The information relating to the Corporation contained in this Prospectus
summarizes, is based upon, or refers to, information and financial statements
contained in one or more of the documents incorporated by reference in this
Prospectus; accordingly, such information contained herein is qualified in its
entirety by reference to such incorporated documents and should be read in
conjunction therewith.
 
                                       2
<PAGE>
 
  The Corporation will provide without charge to each person, including any
beneficial owner, to whom a copy of this Prospectus is delivered, upon the
written or oral request of such person, a copy of any and all of the
information that has been incorporated by reference in the Prospectus (not
including exhibits to the information that is incorporated by reference in the
Prospectus unless such exhibits are specifically incorporated by reference
into the information that the Prospectus incorporates). Requests for such
copies should be addressed to Energen Corporation, Investor Relations
Department, 2101 Sixth Avenue North, Birmingham, Alabama 35203 (telephone
number (800) 654-3206 or (205) 326-2634).
 
                              ENERGEN CORPORATION
 
  The Corporation is a diversified energy holding company engaged in natural
gas distribution and oil and natural gas exploration and production
activities. The Corporation's utility subsidiary, Alabama Gas Corporation
("Alagasco"), is the largest natural gas distribution utility in the State of
Alabama. The Corporation's oil and gas exploration and production activities
are conducted by its subsidiary, Taurus Exploration, Inc. and its subsidiary
(collectively "Taurus").
 
  The Corporation's executive offices are located at 2101 Sixth Avenue North,
Birmingham, Alabama 35203, and its telephone number is (205) 326-2700.
 
               CONSOLIDATED RATIOS OF EARNINGS TO FIXED CHARGES
 
  The following are the consolidated ratios of earnings to fixed charges for
each of the periods indicated:
 
<TABLE>
<CAPTION>
                                                        YEAR ENDED SEPTEMBER 30,
                                                        ------------------------
                                                        1997 1996 1995 1994 1993
                                                        ---- ---- ---- ---- ----
   <S>                                                  <C>  <C>  <C>  <C>  <C>
   Ratio of Earnings to Fixed Charges.................. 2.40 2.91 2.95 3.68 3.01
</TABLE>
 
  For purposes of computing the consolidated ratio, earnings represent net
income applicable to Common Stock, plus applicable income taxes and fixed
charges. Fixed charges represent interest expense, capitalized interest and
amortization of debt expense.
 
                                       3
<PAGE>
 
                                USE OF PROCEEDS
 
  Except as may otherwise be described or referred to in a Prospectus
Supplement, the Company intends to use the net proceeds from the sale of the
Offered Securities for general corporate purposes, including the Corporation's
working capital needs, the funding of investments in, or extensions of credit
to, its subsidiaries, the possible acquisition of other corporations or their
assets or liabilities, including the acquisition of natural gas and oil
properties and the reduction of short-term or other outstanding indebtedness.
Pending such use, the Corporation may temporarily invest the net proceeds in
investment grade securities. The Corporation may, from time to time, engage in
additional capital financings of a character and in amounts to be determined
by the Corporation in light of its need at such time or times and in light of
prevailing market conditions.
 
                        DESCRIPTION OF DEBT SECURITIES
 
  The following description of the terms of the Debt Securities sets forth
certain general terms and provisions of the Debt Securities to which any
applicable Prospectus Supplement may relate. The particular terms of the Debt
Securities offered by any applicable Prospectus Supplement (the "Offered Debt
Securities") and the extent, if any, to which such general provisions may
apply to the Debt Securities so offered will be described in the Prospectus
Supplement relating to such Offered Debt Securities.
 
  The Debt Securities will be issued under an Indenture (the "Indenture")
between the Corporation and The Bank of New York (the "Trustee"). A copy of
the Indenture is filed as an exhibit to this Registration Statement. The
following summaries of the Debt Securities and the Indenture do not purport to
be complete and are subject to, and are qualified in their entirety by
reference to, all the provisions of the Indenture, including the applicable
definitions therein of certain terms used in this Prospectus. All capitalized
terms not defined in this Prospectus shall have the definitions ascribed to
them in the Indenture. Copies of the Indenture are available for inspection
during normal business hours at the principal office of the Corporation or at
the corporate trust office of the Trustee.
 
GENERAL
 
  The Debt Securities will be direct, unsecured obligations of the Corporation
and will rank pari passu with all outstanding unsecured senior indebtedness of
the Corporation. The Indenture does not limit the aggregate principal amount
of Debt Securities that may be issued thereunder and provides that Debt
Securities may be issued thereunder from time to time in one or more series.
All securities issued under the Indenture will rank equally and ratably with
all other securities to be issued under such Indenture. The Corporation has
previously issued $125,000,000 principal amount of its Medium-Term Notes,
Series A under the Indenture, all of which are outstanding on the date hereof.
 
  The Debt Securities will be obligations exclusively of the Corporation.
Since substantially all of the operations of the Corporation are conducted
through its subsidiaries, principally Alagasco and Taurus, the Corporation's
cash flow and consequently its ability to service debt is dependent upon the
cash flow of its subsidiaries and the payment of funds by those subsidiaries
in the form of dividends.
 
  The Prospectus Supplement and any related Pricing Supplement will describe
certain terms of the Offered Debt Securities, including: (1) the title of the
Offered Debt Securities; (2) any limit on the aggregate principal amount of
the Offered Debt Securities; (3) the date or dates on which the principal of
the Offered Debt Securities is payable; (4) the rate or rates per annum (which
may be fixed or variable) at which the Offered Debt Securities will bear
interest, if any, or any method by which such rate or rates shall be
determined, and the date or dates from which such interest will accrue; (5)
the date or dates on which interest, if any, on the Offered Debt Securities
will be payable and the Regular Record Dates for any such Interest Payment
Dates; (6) each office or agency where the principal of, and premium, if any,
and any interest on the Offered Debt Securities will be payable and may be
surrendered for registration of transfer or exchange; (7) the period or
periods within which,
 
                                       4
<PAGE>
 
the price or prices at which, and the terms and conditions upon which the
Offered Debt Securities may be redeemed, in whole or in part, at the option of
the Corporation; (8) the obligation, if any, of the Corporation to redeem or
purchase the Offered Debt Securities pursuant to any sinking fund or similar
provisions or at the option of a Holder thereof and the period or periods
within which, the price or prices at which and the terms and conditions upon
which the Offered Debt Securities will be redeemed or purchased, in whole or
in part, pursuant to any such obligation; (9) whether the Offered Debt
Securities are to be issued in whole or in part in the form of one or more
global notes, and, if so, the identity of the depositary for such global notes
and the terms and conditions, if any, on which interests in such global notes
may be exchanged for the individual securities represented thereby; (10)
whether the Offered Debt Securities are to be issued with original issue
discount within the meaning of section 1273(a) of the Internal Revenue Code of
1986, as amended (the "Code"), and the regulations thereunder and the amount
of such discount; (11) the obligations or instruments which shall be
considered to be Eligible Obligations in respect of Offered Debt Securities
denominated in any currency other than United States Dollars or in a composite
currency, and any additional or alternative provisions for the reinstatement
of the Corporation indebtedness in respect of Offered Debt Securities after
the satisfaction and discharge thereof; (12) any provisions for payment of
additional amounts for taxes, and any provisions for redemption in the event
the Corporation must comply with withholding tax or other tax reporting
requirements in respect of an Offered Debt Security other than a Floating Rate
Security ("Affected Security") or must pay such additional amounts in respect
of any Offered Debt Security; (13) any index used to determine the amount of
payment of principal of, and premium, if any, and any interest on the Offered
Debt Securities; (14) the applicable Overdue Rate, if any; (15) any addition
to, or modification or deletion of, any Events of Default or covenants
provided for with respect to the Offered Debt Securities; (16) if the
principal of or premium, if any, or interest, if any, on the Offered Debt
Securities are to be payable, at the election of the Corporation or a Holder
thereof, in a coin or currency other than that in which the Debt Securities
are stated to be payable, the period or periods within which, and the terms
and conditions upon which, such election may be made; (17) the currency or
currencies, including composite currencies, in which payment of the principal
of and premium, if any, and interest, if any, on the Offered Debt Securities
shall be payable (if other than the currency of the United States); (18) if
the principal of or premium, if any, or interest on the Offered Debt
Securities are to be payable, or are to be payable at the election of the
Corporation or a Holder thereof, in securities or other property, the type and
amount of such securities or other property, or the method by which such
amount shall be determined, and the period or periods within which, and the
terms and conditions upon which, any such election may be made; (19) the
terms, if any, pursuant to which the Offered Debt Securities may be converted
into or exchanged for shares of capital stock or other securities of the
Corporation; and (20) any other terms and provisions of the Offered Debt
Securities which are not inconsistent with the Indenture.
 
  Unless otherwise provided in the Prospectus Supplement or a Pricing
Supplement, the Debt Securities will be issued only in fully registered form,
without coupons, in denominations of $1,000 or any integral multiple thereof.
 
  Debt Securities may be issued as Discount Securities to be sold at a
substantial discount below their principal amount. Discount Securities mean
any Debt Securities issued with "original issue discount" within the meaning
of Section 1273(a) of the Code and the regulations thereunder. Special United
States income tax and other considerations applicable to Discount Securities
will be described in any applicable Prospectus Supplement relating thereto.
Discount Securities may provide for the declaration of acceleration of the
Maturity of an amount less than the principal amount thereof upon the
occurrence of an Event of Default and the continuation thereof.
 
  The Indenture provides that all Debt Securities of any one series need not
be issued at the same time and that the Corporation may, from time to time,
issue additional Debt Securities of a previously issued series. In addition,
the Indenture provides that the Corporation may issue Debt Securities with
terms different from those of any other series of Debt Securities and, within
a series of Debt Securities, terms (such as interest rate or manner in which
interest is calculated, original issue date, redemption provisions and
maturity date) may differ.
 
                                       5
<PAGE>
 
CERTAIN CONDITIONS FOR ISSUANCE OF ADDITIONAL INDEBTEDNESS
 
  Pursuant to Section 234 of the Constitution of Alabama of 1901, the bonded
indebtedness of Alabama corporations may not be increased without the consent
of shareholders. The Corporation is presently authorized to issue, without
further shareholder approval, bonded indebtedness in an amount which, when
added to the bonded indebtedness then outstanding, does not exceed the greater
of (i) $750,000,000 or (ii) one hundred fifty percent (150%) of the total
shareholders' equity of the Corporation as reflected in the consolidated
financial statements of the Corporation as of the end of the Corporation's
most recently completed fiscal quarter.
 
GLOBAL NOTES
 
  If the Prospectus Supplement so provides, the Offered Debt Securities of a
series may be issued in whole or in part in the form of one or more Global
Notes that will be deposited with or on behalf of a depositary located in the
United States identified in any applicable Prospectus Supplement relating to
such series. The laws of some jurisdictions require that certain purchasers of
securities take physical delivery of such securities in definitive form. Such
limits and such laws may impair the ability to transfer beneficial interests
in a Global Note. The specific terms of the depositary arrangement with
respect to any Offered Debt Securities of a series will be described in any
applicable Prospectus Supplement relating to such series.
 
PAYMENT AND PAYING AGENTS
 
  Except as may be provided in the applicable Prospectus Supplement, interest,
if any, on each Debt Security payable on each Interest Payment Date will be
paid to the person in whose name such Debt Security is registered as of the
close of business on the Regular Record Date relating to such Interest Payment
Date. However, if there has been a default in the payment of interest on any
Debt Security, such defaulted interest may be payable to the Holder of such
Debt Security as of the close of business on a date selected by the Trustee
not more than 15 days and not less than 10 days prior to the date proposed by
the Corporation for payment of such defaulted interest.
 
  Unless otherwise indicated in any applicable Prospectus Supplement,
principal of, and premium and interest, if any, on the Debt Securities will be
payable at the office of the Trustee designated for such purpose or at any
paying agent maintained by the Corporation for such purpose, except that at
the option of the Corporation payment of any interest may be made (i) by check
mailed to the address of the Person entitled thereto as such address shall
appear in the Security Register, or (ii) by wire transfer to an account
maintained by the Person entitled thereto. The Corporation may appoint one or
more Paying Agents and may remove any Paying Agent, all in its discretion.
 
  The transfer of the Debt Securities may be registered, and the Debt
Securities may be exchanged for other Debt Securities of authorized
denominations and of like tenor and aggregate principal amount at the office
of the Trustee designated for such purpose or at any paying agency maintained
by the Corporation for such purpose. The Corporation may appoint one or more
additional security registrars or transfer agents and may remove any security
registrar or transfer agent, all in its discretion. The applicable Prospectus
Supplement will identify any additional security registrar or transfer agent
appointed.
 
  No service charge will be made for any registration of transfer or exchange
of the Debt Securities, but the Corporation may require payment of a sum
sufficient to cover any tax or other governmental charge payable in connection
therewith. The Corporation will not be required (a) to issue, register the
transfer of or exchange Debt Securities during the period of 15 days prior to
giving any notice of redemption or (b) to issue, register the transfer of or
exchange any Debt Security selected for redemption in whole or in part, except
the unredeemed portion of any Debt Security being redeemed in part.
 
                                       6
<PAGE>
 
  All moneys paid by the Corporation to the Trustee or a Paying Agent for the
payment of principal of, and premium, if any, and any interest on any Debt
Securities which remain unclaimed at the end of two years after such
principal, premium or interest shall become due and payable will be repaid,
subject to applicable laws of escheat, to the Corporation, and the Holder of
such Debt Securities will thereafter look only to the Corporation for payment
thereof.
 
REDEMPTION
 
  Any terms for the optional or mandatory redemption of the Offered Debt
Securities will be set forth in the applicable Prospectus Supplement. In
accordance with the terms of the Indenture, Debt Securities will be redeemable
only upon notice, by mail, not less than 30 nor more than 60 days prior to the
date fixed for redemption and, if less than all of the Debt Securities of any
series are to be redeemed, the particular Debt Securities will be selected by
the Security Registrar by such method as the Trustee deems fair and
appropriate.
 
  Any notice of optional redemption may state that such redemption shall be
conditional upon the receipt by the Trustee, on or prior to the date fixed for
such redemption, of money sufficient to pay the principal of and premium and
interest, if any, on such Debt Securities and that if such money has not been
so received, such notice will be of no force or effect and the Corporation
will not be required to redeem such Debt Securities.
 
EVENTS OF DEFAULT
 
  The following are Events of Default under the Indenture with respect to the
Debt Securities of a series: (a) failure to pay any interest on any Debt
Security of that series within 30 days after the same becomes due and payable;
(b) failure to pay the principal of or premium, if any, on any Debt Security
of that series within three business days after the same becomes due and
payable; (c) failure to perform, or breach of, any other covenant or warranty
of the Corporation in the Indenture (other than a covenant or warranty
included in the Indenture solely for the benefit of one or more series of Debt
Securities other than such series), continued for 90 days after written notice
by the Trustee to the Corporation or by the Holders of at least 25% in
principal amount of all Outstanding Debt Securities of such series to the
Corporation and the Trustee as provided in the Indenture; (d) certain events
involving bankruptcy, insolvency, conservatorship, receivership or
reorganization of the Corporation or Alagasco or Taurus, whether voluntary or
involuntary; (e) a default under any other indebtedness of the Corporation or
Alagasco or Taurus or instrument under which there may be issued or by which
there may be secured or evidenced any indebtedness of the Corporation or
Alagasco or Taurus, in each case aggregating in excess of $10,000,000, which
default constitutes a failure to pay any portion of the principal of such
indebtedness when due or results in the acceleration of the maturity of such
indebtedness, unless within a period of 10 days after written notice of such
default has been given to the Corporation by the Trustee or to the Corporation
and the Trustee by the Holders of at least 10% in principal amount of the
Outstanding Debt Securities of any series, such indebtedness has been
discharged or such acceleration has been rescinded or annulled; and (f) any
other Event of Default provided for with respect to Debt Securities of that
series.
 
  Except as described in (d) and (e) above, no Event of Default with respect
to the Debt Securities of one series necessarily constitutes an Event of
Default with respect to the Debt Securities of any other series issued under
the Indenture.
 
REMEDIES
 
  If any Event of Default with respect to the Debt Securities of any series
occurs and is continuing, either the Trustee or the Holders of at least 33% in
aggregate principal amount of all the Outstanding Debt Securities of that
series may declare the principal amount of all the Outstanding Debt Securities
of that series to be due and payable immediately; provided, however, that if
an Event of Default occurs and is continuing with respect to more than one
series of Debt Securities, the Trustee or the Holders of not less than 33% in
aggregate principal amount of the Outstanding Debt Securities of all such
series, considered as one class, may make such declaration of acceleration and
not the Holders of the Debt Securities of any one of such series.
 
 
                                       7
<PAGE>
 
  The Holders of a majority in aggregate principal amount of the Outstanding
Debt Securities of each series may, on behalf of all Holders of the Debt
Securities of that series, waive any past default and its consequences under
the Indenture with respect to the Debt Securities of that series, except a
default in the payment of principal or premium or interest, if any, on any
Debt Security of that series, or in respect of a provision of the Indenture
which cannot be amended or modified without the consent of the Holder of each
Outstanding Debt Security of the series affected.
 
  At any time after the declaration of acceleration with respect to Debt
Securities of any series has been made, but before a judgment or decree for
the payment of money due has been obtained, the Event or Events of Default
giving rise to such declaration of acceleration shall, without further act, be
deemed to have been waived, and such declaration and its consequences shall,
without further act, be deemed to have been rescinded and annulled if (a) the
Corporation has paid or deposited with the Trustee a sum sufficient to pay (1)
all overdue interest on all of such Debt Securities; (2) the principal of and
premium, if any, on any of such Debt Securities which have become due
otherwise than by such declaration of acceleration and interest thereon at the
rate or rates prescribed therefor in such Debt Securities; (3) to the extent
that payment of such interest is lawful, interest upon overdue interest at the
rate or rates prescribed therefor in such Debt Securities; (4) all amounts due
to the Trustee under the Indenture; and (b) any other Events of Default with
respect to the Debt Securities of such series, other than the nonpayment of
the principal of such Debt Securities which has become due solely by such
declaration of acceleration, have been cured or waived as provided in the
Indenture.
 
MISCELLANEOUS RIGHTS AND OBLIGATIONS OF TRUSTEE
 
  The Indenture provides that, subject to the duty of the Trustee during the
continuance of an Event of Default to act with the required standard of care,
the Trustee will be under no obligation to exercise any of its rights or
powers under the Indenture at the request or direction of any of the Holders,
unless such Holders shall have offered to the Trustee reasonable security or
indemnity. Subject to such provisions for the indemnification of the Trustee
and subject to certain other limitations, the Holders of a majority in
aggregate principal amount of the Outstanding Debt Securities of any series
will have the right to direct the time, method and place of conducting any
proceeding for any remedy available to the Trustee, or exercising any trust or
power conferred on the Trustee, with respect to the Debt Securities of that
series; provided, however, that if an Event of Default occurs and is
continuing with respect to more than one series of Debt Securities, the
Holders of a majority in aggregate principal amount of the outstanding Debt
Securities of all such series, considered as one class, will have the right to
make such direction, and not the Holders of the Debt Securities of any one of
such series; and provided, further, that (a) such direction will not be in
conflict with any rule of law or with the Indenture and would not involve the
Trustee in personal liability in circumstances where reasonable indemnity
would not, in the Trustee's sole discretion, be adequate, (b) the Trustee
shall not have determined that the action so directed would be unjustly
prejudicial to the Holders not taking part in such direction and, (c) the
Trustee may take any other action it deems proper which is not inconsistent
with such direction. The right of a Holder of any Debt Security of such series
to institute a proceeding with respect to the Indenture is subject to certain
conditions precedent, but each Holder has an absolute right to receive payment
of principal and premium and interest, if any, when due and to institute suit
for the enforcement of any such payment. The Indenture provides that the
Trustee, within 90 days after the occurrence of any default thereunder with
respect to the Debt Securities of a series, is required to give the Holders of
the Debt Securities of such series notice of any default known to it, unless
cured or waived; provided, however, that, except in the case of a default in
the payment of principal of or premium or interest, if any, on any Debt
Securities of such series, the Trustee may withhold such notice if the Trustee
determines that it is in the interest of such Holders to do so; and, provided,
further, that in the case of an Event of Default of the character specified
above in clause (c) under "Events of Default," no such notice shall be given
to such Holders until at least 75 days after the occurrence thereof.
 
  The Corporation is required to furnish to the Trustee annually a statement
as to the performance by the Corporation of certain of its obligations under
the Indenture and as to any default in such performance. The Corporation is
also required to notify the Trustee of any Event of Default within 10 days
after certain of its officers obtain actual knowledge thereof.
 
                                       8
<PAGE>
 
MODIFICATION, WAIVER AND AMENDMENT
 
  Certain modifications and amendments of the Indenture may be made by the
Corporation and the Trustee without the consent of the Holders, including
those which: (a) evidence the assumption by any successor to the Corporation
of the Corporation's obligations under the Indenture or with respect to the
Debt Securities; (b) add to the covenants of or surrender any rights of the
Corporation under the Indenture; (c) add any Events of Default, in addition to
those specified in the Indenture, with respect to all or any series of
Outstanding Debt Securities; (d) change or eliminate any provision of the
Indenture or add any new provision to the Indenture; provided, however, that
if such change, elimination or addition will materially and adversely affect
the interests of Holders of Debt Securities of any series, such change,
elimination or addition will become effective with respect to such series only
when there is no Debt Security of such series remaining outstanding under the
Indenture; (e) provide collateral security for the Debt Securities; (f)
establish the form or terms of Debt Securities of any series; (g) evidence the
appointment of a successor Trustee with respect to the Debt Securities of one
or more series and to add to or change any of the provisions of the Indenture
as shall be necessary to provide for or facilitate the administration of the
trusts under the Indenture by more than one trustee; (h) provide for the
procedures required to permit the utilization of a noncertificated system of
registration for all or any series of Debt Securities; (i) subject to certain
conditions, change the place where Debt Securities may be transferred,
exchanged or paid; or (j) cure any ambiguity or inconsistency or make any
other provisions with respect to matters and questions arising under the
Indenture, provided such provisions shall not adversely affect the interests
of the Holders of Debt Securities of any series in any material respect.
 
  Without limiting the generality of the foregoing, if the Trust Indenture Act
of 1939, as amended (the "Trust Indenture Act"), is amended after the date of
the Indenture to require changes to the Indenture or the incorporation therein
of additional provisions or permit changes to, or the elimination of,
provisions which at the date of the Indenture are required by the Trust
Indenture Act to be contained in the Indenture, the Corporation and the
Trustee may, without the consent of any Holders, enter into one or more
supplemental indentures to effect or reflect any such change, incorporation or
elimination.
 
  Modifications of and amendments to the Indenture may be made by the
Corporation and the Trustee with the consent of the Holders of not less than a
majority in aggregate principal amount of the Outstanding Debt Securities of
each series affected by such modification or amendment voting separately;
provided, however, that no such modification or amendment may, without the
consent of the Holder of each Outstanding Debt Security affected thereby, (a)
change the Stated Maturity of the principal of, or any installment of
principal or interest on, any Debt Security; (b) reduce the principal amount
thereof or the rate of interest thereon or any premium payable upon redemption
thereof; (c) reduce the amount of the principal of Discounted Securities that
would be due and payable upon a declaration of acceleration of the maturity
thereof; (d) change the coin or currency in which any Debt Security or any
premium or the interest thereon is payable; (e) impair the right to institute
suit for the enforcement of any such payment; (f) reduce the percentage in
principal amount of Outstanding Debt Securities of any series, the consent of
whose Holders is required for modification or amendment of the Indenture or
for waiver of compliance with certain provisions of the Indenture or for
waiver of certain defaults; (g) reduce the requirements for quorum or voting;
or (h) modify the provisions of the Indenture relating to the modification of
the Indenture, or the circumstances under which the Holders may waive past
defaults by and certain covenants of the Corporation except to increase the
percentages in principal amount referred to therein.
 
  The Holders of not less than a majority in aggregate principal amount of the
Outstanding Debt Securities of all series with respect to which a certain
covenant or restriction has been specified, may, on behalf of all Holders of
Debt Securities waive compliance by the Corporation with certain covenants of
the Indenture. The Holders of a majority in aggregate principal amount of the
Outstanding Debt Securities of any series may, on behalf of all Holders of
Debt Securities of that series (a) waive any past default under the Indenture
with respect to Debt Securities of that series, except a default (i) in the
payment of principal, premium, if any, or interest on any Debt Security, or
(ii) in respect of a covenant or provision that cannot be modified or amended
without the consent of the Holder of each Outstanding Debt Security affected
thereby, and (b) waive any Event of Default resulting in acceleration of such
Debt Securities in specified circumstances.
 
                                       9
<PAGE>
 
CONSOLIDATION, MERGER AND SALE OF ASSETS
 
  The Indenture provides that the Corporation shall not consolidate with or
merge into any other corporation, association, company, joint stock company,
limited liability company or business trust (the "Successor Corporation") or
convey, transfer or lease its properties and assets substantially as an entity
to any Person unless (i) the Successor Corporation into which the Corporation
is merged or into which it is consolidated or the Person to which
substantially all of the Corporation's assets or properties are conveyed,
transferred or leased, is a Person organized under the laws of the United
States, any state thereof or the District of Columbia, and expressly assumes
by means of a supplemental indenture the due and punctual payment of the
principal (and premium, if any) and interest on all the Outstanding Debt
Securities and the performance of every covenant of the Corporation in the
Indenture; (ii) upon the occurrence of such a transaction, treating any
indebtedness for borrowed money which becomes an obligation of the Corporation
as a result of such transaction as having been incurred by the Corporation at
the time of such transaction, no Event of Default, and no event which, after
notice or lapse of time, or both, would become an Event of Default, shall
occur or be continuing; and (iii) the Corporation or the Successor Corporation
or Person delivers to the Trustee an Officers' Certificate and an Opinion of
Counsel stating that the consolidation, merger, conveyance, transfer or lease
and the supplemental indenture complies with the Indenture and all conditions
precedent for such transaction in the Indenture have been complied with.
 
CERTAIN COVENANTS
 
  Maintenance of Property. The Corporation will cause (or, with respect to
property owned in common with others, make reasonable effort to cause) all its
properties used or useful in the conduct of its business to be maintained and
kept in good condition, repair and working order and will cause (or with
respect to property owned in common with others, make reasonable effort to
cause) to be made all necessary repairs, renewals, replacements, betterments
and improvements thereof, all as, in the judgment of the Corporation, may be
necessary so that the business carried on in connection therewith may be
properly conducted; provided, however, that the foregoing shall not prevent
the Corporation from discontinuing, or causing the discontinuance of, the
operation and maintenance of any of its properties if such discontinuance, in
the judgment of the Corporation, (a) is desirable in the conduct of its
business and (b) will not adversely affect the interests of the Holders of
Debt Securities of any series in any material respect.
 
  Corporate Existence. Subject to the rights of the Corporation described
under "Consolidation, Merger and Sale of Assets," the Corporation will do or
cause to be done all things necessary to preserve and keep in full force and
effect its corporate existence and rights (charter and statutory) and
franchises of the Corporation; provided, however, that the Corporation shall
not be required to preserve any such right or franchise if, in the judgment of
the Corporation (a) preservation thereof is no longer desirable in the conduct
of the business of the Corporation and (b) the failure to preserve any such
right or franchise will not adversely affect the interests of the Holders of
Debt Securities of any series in any material respect.
 
  Restriction on Liens. The Corporation will not create, assume, incur or
suffer to exist any mortgage, lien, pledge, charge or encumbrance of any kind
(other than "Excepted Encumbrances") upon property of the Corporation (other
than "Excepted Property") to secure indebtedness without effectively providing
that the Debt Securities shall be secured equally and ratably with the
indebtedness secured by such mortgage, lien, pledge, charge or encumbrance.
Subject to the next succeeding sentence, the foregoing restriction shall not
apply to (1) pledging of any assets of the Corporation as security for payment
of taxes or other similar charges in connection with a good faith contest by
the Corporation as to its liability for such payment; (2) pledging of any
assets of the Corporation to secure a stay or discharge in connection with a
legal proceeding in which the Corporation or a subsidiary is a party or for
the purpose of obtaining insurance coverage or other surety obligations
providing for securing such stay or discharge in the event such stay or
discharge should be required; (3) making deposits or providing security in
connection with tenders, redemptions, contracts or leases to which the
Corporation is a party or deposits for the purpose of terminating obligations
under an indenture; (4) pledging
 
                                      10
<PAGE>
 
of assets in connection with the incurrence of indebtedness in aggregate
principal amount not exceeding 5% of the assets of the Corporation as
presented in the financial statements of the Corporation contained in the most
recently filed report on Form 10-K or 10-Q (or successor forms thereto) filed
with the Commission at the time of such pledge; (5) liens, pledges, security
interests or other encumbrances on property, stock or indebtedness of any
corporation existing at the time such corporation becomes a subsidiary of or
is merged into the Corporation, or existing at the time of acquisition of such
property or stock by the Corporation; (6) incurring liens, licenses, pledges,
security interests or other encumbrances to secure payment of all or a part of
the price of acquisition, construction or improvement of property or stock
acquired by the Corporation or to secure any indebtedness incurred by the
Corporation prior to, at the time of, or within 180 days after the later of
the acquisition or completion of construction where the secured debt is
incurred for the purpose of financing all or any part of the purchase price of
such property or construction or improvements thereon; (7) liens, pledges,
security interests or other encumbrances on property of the Corporation
created in favor of a government or any political subdivision or
instrumentality thereof, to secure partial progress, installment, advance or
other payments pursuant to any contract or statute or to secure any
indebtedness or other obligation incurred for the purpose of financing all or
any part of the purchase price or the cost of construction of property subject
to the encumbrance; or (8) any extension, renewal or replacement of any lien
or encumbrance referred to above, provided that the principal amount of the
indebtedness secured thereby is not increased and the lien or security
interest securing the indebtedness is not extended to cover additional
property. Notwithstanding the foregoing, in no event shall the Corporation
create, assume, incur or suffer to exist pursuant to the foregoing clauses (1)
and (3) through (8) any mortgage, lien, pledge, charge or encumbrance on the
capital stock of either of Alagasco or Taurus directly or indirectly owned by
the Corporation. The term "Excepted Encumbrances" means liens for taxes,
assessments or governmental charges not delinquent; liens securing
indebtedness existing in or relating to real estate acquired for right-of-way
purposes; easements or reservations in property of the Company by statute or
ordinance; liens and charges incidental to current construction activities;
obligations or duties created or imposed by municipalities or other public
authority affecting property of the Company; rights reserved to or vested in
any municipality or public authority to control or regulate the Company or use
of its property; irregularities or deficiencies of title with respect to
rights-of-way; and leases made or existing in the ordinary course of business
of the Company. The term "Excepted Property" generally means certain property
or equipment of the Corporation used in the ordinary course of business,
including current assets, vehicles, certain inventories and equipment, as more
particularly defined in the Indenture, and excludes capital stock issued by
Alagasco and Taurus.
 
  Restriction on Sale-Leaseback Transactions. The Corporation will not enter
into any arrangement providing for the lease to the Corporation of any
property of the Corporation (except for temporary leases for a term, including
any renewal thereof, of not more than three years), which property has been or
is to be sold or transferred by the Corporation to the lessor unless the
proceeds of such sale are at least equal to the fair value of such property
and either: (i) the Corporation would be entitled, under the sub-caption
"Restriction on Liens," to create, assume, incur or suffer to exist a
mortgage, lien, pledge, charge or encumbrance to secure indebtedness on the
property to be leased without equally and ratably securing the Offered
Securities; or (ii) the Corporation shall, or covenants that it will, within
120 days of the effective date of any such arrangement (or in the case of
clause (a) below, within six months thereafter pursuant to a commitment
entered into within such 120 day period), apply an amount not less than the
fair value of such property to any one or more of (a) the optional redemption
of, or the purchase and retirement of, the Debt Securities, or (b) the payment
or other retirement of Funded Debt (as defined therein) incurred or assumed by
the Corporation which ranks pari passu with the Debt Securities (other than
Funded Debt owned by the Corporation), or (c) the purchase at not more than
the fair value of property by the Corporation (other than property of the
Corporation involved in such sale).
 
SATISFACTION AND DISCHARGE; DEFEASANCE
 
  The Indenture, with respect to any and all series of Debt Securities (except
for certain specified surviving obligations) will be discharged and canceled
upon the satisfaction of certain conditions, including: (a) the payment in
full of the principal of (and premium, if any) and interest on all series of
the Debt Securities or the
 
                                      11
<PAGE>
 
deemed payment in full of such Debt Securities, as described below; (b) the
payment by the Corporation of all other sums required under the Indenture; and
(c) the delivery of a certificate by the Corporation to the Trustee stating
that all conditions precedent relating to the satisfaction and discharge of
the Indenture have been complied with.
 
  In addition, the Corporation may at any time (i) terminate certain of its
obligations under the Indenture with respect to Debt Securities of any series
("legal defeasance") or (ii) terminate its obligations under certain covenants
set forth in the Indenture with respect to Debt Securities of any series,
including the provisions described above under "Certain Covenants--Restriction
on Liens," "--Restriction on Sale-Leaseback Transactions" and "Consolidation,
Merger and Sale of Assets" (after which any omission to comply with such
obligations shall not constitute a Default with respect to such Debt
Securities) ("covenant defeasance"). To exercise either legal defeasance or
covenant defeasance, the Corporation must irrevocably deposit in trust with
the Trustee, for the benefit of the Holders, cash or Eligible Obligations, or
a combination thereof, in such amounts as will be sufficient to pay the
principal of and premium and interest, if any, due and to become due on the
Debt Securities of such series on or prior to their redemption or maturity
date in accordance with the terms of the Indenture and such Debt Securities;
provided either (i) that such money or the proceeds of such Eligible
Obligations shall have been on deposit with the Trustee for a period of at
least 90 days, or (ii) that the Trustee shall have received an Opinion of
Counsel to the effect that payments to Holders with such moneys as proceeds
are not recoverable as a preference under any applicable United States federal
or state law relating to bankruptcy, insolvency, receivership, winding-up,
liquidation, reorganization or relief of debtors. The Corporation must also
comply with certain other conditions, including the delivery of an opinion of
counsel to the effect that the holders of such Debt Securities will not
realize income, gain or loss for Federal income tax purposes as a result of
such defeasance but will realize income, gain or loss on the Debt Securities,
including payments of interest thereon, in the same manner and at the same
times as would have been the case if such defeasance had not occurred. In the
case of legal defeasance, the opinion of counsel must be accompanied by a
ruling of the Internal Revenue Service issued to the Corporation, or based on
a change in law or regulation occurring after the date of the Indenture.
 
  Eligible Obligations include: (a) with respect to Debt Securities
denominated in United States Dollars, Government Obligations (which include
direct obligations of, or obligations unconditionally guaranteed by, the
United States of America entitled to the benefit of the full faith and credit
thereof and certificates, depository receipts or other instruments which
evidence a direct ownership interest in such obligations or in any specific
interest or principal payments due in respect thereof); and (b) with respect
to Debt Securities denominated in a currency other than United States Dollars
or in a composite currency, such other obligations or instruments as shall be
specified with respect to such Debt Securities, as contemplated by the
Indenture.
 
GOVERNING LAW
 
  The Debt Securities and the Indenture will be governed by, and construed in
accordance with, the laws of the State of New York.
 
U.S. FEDERAL TAXATION
 
  The Prospectus Supplement will contain a brief summary of the relevant
United States federal income tax laws applicable to the Offered Debt
Securities.
 
                                      12
<PAGE>
 
                         DESCRIPTION OF CAPITAL STOCK
 
  The Corporation's authorized capital stock consists of 30,000,000 shares of
Common Stock, par value $.01 per share (hereinafter and hereinbefore referred
to as the "Common Stock"), and 5,000,000 shares of Preferred Stock, par value
$.01 per share ("Preferred Stock"), each of which is described below. The
Corporation is requesting that its shareholders approve an increase in the
number of authorized shares of Common Stock from 30,000,000 to 75,000,000 at
the annual meeting of its shareholders in January 1998. On December 10, 1997,
14,476,686 shares of Common Stock were issued and outstanding, excluding
shares held in treasury, and no shares of Preferred Stock were issued or
outstanding. The summary description of the capital stock of the Corporation
contained herein is necessarily general and reference should be made in each
case to the Corporation's Restated Certificate of Incorporation, Certificate
of Adoption of Resolutions Designating Series A Junior Participating Preferred
Stock, Bylaws and Rights Agreement which are exhibits to the Registration
Statement of which this Prospectus is a part.
 
COMMON STOCK
 
  General. Subject to any prior rights of the Preferred Stock then
outstanding, holders of Common Stock are entitled to receive dividends as and
when they are declared by the Board of Directors out of funds legally
available therefor. Subject to the rights, if any, of the Preferred Stock, all
voting rights are vested in the holders of shares of Common Stock, each share
being entitled to one vote. The holders of Common Stock are not entitled to
cumulative voting rights in the election of directors, which means that the
holders of more than 50% of the shares of Common Stock voting for election of
directors can elect 100% of the directors if they choose to do so and, in such
event, the holders of the remaining less than 50% of the shares voting for the
election of directors are not able to elect any person or persons to the Board
of Directors. Subject to any prior rights of the Preferred Stock, in the event
of liquidation, the holders of Common Stock are entitled to receive pro rata
any assets distributable to shareholders in respect of shares held by them.
Holders of Common Stock do not have any right to subscribe to any additional
securities which may be issued by the Company. The outstanding shares of
Common Stock are fully paid and nonassessable.
 
  Special Vote Requirements for Certain Transactions. The Restated Certificate
of Incorporation of the Corporation provides that certain specified
transactions or a series of such transactions with an "Interested Stockholder"
(generally defined as a holder of 10% or more of the voting power of the
outstanding voting stock of the Corporation or an affiliate of such a holder)
require approval by the vote of the holders of at least 80% of the then
outstanding shares of voting stock of the Corporation, except in cases in
which either certain price criteria and procedural requirements are satisfied
or the transaction is approved by a majority of the members of the Board of
Directors who are unaffiliated with, and not a nominee of, the Interested
Stockholder and who were directors before the Interested Stockholder became an
Interested Stockholder (or successors to such directors who are neither
affiliated with, nor the nominee of, the Interested Stockholder and who were
recommended to succeed their predecessors by a majority of the directors
meeting such criteria). The specified transactions include (i) a merger or
consolidation of the Corporation or any of its subsidiaries with or into an
Interested Stockholder or any other corporation which is, or after such merger
or consolidation would be, an Affiliate (as defined) of an Interested
Stockholder; (ii) the sale, lease, exchange, mortgage, pledge, transfer or
other disposition of assets of the Corporation or any of its subsidiaries
having a value of $1,000,000 or more to or with an Interested Stockholder or
any Affiliate of an Interested Stockholder; (iii) the issuance or transfer of
stock or other securities of the Corporation or of any of its subsidiaries to
an Interested Stockholder or any Affiliate of any Interested Stockholder in
exchange for cash, securities or other property having a value of $1,000,000
or more; (iv) the adoption of any plan or proposal for the liquidation or
dissolution of the Corporation proposed by or on behalf of an Interested
Stockholder or any Affiliate of any Interested Stockholder; or (v) any
reclassification of securities, recapitalization, merger or consolidation of
the Corporation with a subsidiary or any similar transaction which has the
effect, directly or indirectly, of increasing an Interested Stockholder's or
any Affiliate of an Interested Stockholder's proportionate share of the
outstanding equity securities (or securities convertible thereinto) of the
Corporation or any of its subsidiaries. At present, the Corporation is not
aware of the existence of any shareholder who would be an Interested
Stockholder.
 
                                      13
<PAGE>
 
  Provisions with respect to Board of Directors. The Restated Certificate of
Incorporation of the Corporation provides that the members of the Board of
Directors are divided into three classes as nearly equal as possible. Each
class is elected for a three-year term. At each annual meeting of
shareholders, one-third of the members of the Board of Directors are elected
for a three-year term, and the other directors remain in office until their
three-year terms expire. Thus, control of the Board of Directors cannot be
changed in one year; rather, at least two annual meetings must be held before
a majority of the members of the Board of Directors can be changed.
 
  Vacancies on the Board of Directors other than those caused by an increase
in the number of directors may be filled by a majority of the remaining
directors though less than a quorum. A director elected to fill such a vacancy
is elected to serve until the next annual meeting of shareholders. Any
directorship to be filled as a result of an increase in the number of
directors may be filled only by election at an annual meeting or at a special
meeting of shareholders called for such purpose unless Alabama law at such
time permits such vacancy to be filled by a majority of the remaining
directors.
 
  The Alabama Business Corporation Act provides (unless otherwise provided in
a corporation's charter) that a director, or the entire Board of Directors,
may be removed by the shareholders at a meeting of shareholders expressly
called for that purpose with or without cause by vote of the holders of a
majority of the shares of the Corporation then entitled to vote on election of
directors. The Restated Certificate of Incorporation and Bylaws of the
Corporation, however, provide that the affirmative vote of the holders of at
least 80% of the voting power of the outstanding capital stock entitled to
vote for the elections of directors is required to remove a director or the
entire Board of Directors from office.
 
  Special Vote Requirements for Certain Amendments to Restated Certificate of
Incorporation. Certain portions of the Restated Certificate of Incorporation
of the Corporation described in certain of the preceding paragraphs, including
those related to business combinations and the classified Board of Directors,
may be amended only by the affirmative vote of the holders of 80% of the
voting power of the outstanding voting stock of the Corporation.
 
  Possible Effects of Special Provisions. Certain of the provisions contained
in the Restated Certificate of Incorporation and Bylaws of the Corporation
described above have the effect of making it more difficult to change the
Board of Directors and may make the Board of Directors less responsive to
shareholder control. Certain of these provisions also may tend to discourage
attempts by third parties to acquire the Corporation because of the additional
time and expense involved and a greater possibility of failure, and, as a
result, may decrease the likelihood of an acquisition of the Corporation by a
potential purchaser or adversely affect the price that a potential purchaser
would be willing to pay for the capital stock of the Corporation.
 
  Preferred Stock Purchase Rights. In order to protect the Corporation's
shareholders from coercive or unfair takeover tactics, the Corporation's Board
of Directors on July 27, 1988 adopted a Shareholder Rights Plan (the
"Shareholder Rights Plan"). Pursuant to the Shareholder Rights Plan, each
share of the Corporation's Common Stock outstanding has associated with it
two-thirds of one right (a "Right") to purchase, until July 27, 1998 (or, if
earlier, the redemption of the Rights), a unit consisting of 1/100th of one
share of Series A Junior Participating Preferred Stock (the "Unit") at an
exercise price of $80 per Unit, subject to certain antidilution and other
adjustments as provided in the Shareholder Rights Plan. The Shareholder Rights
Plan also approved the further issuance of Rights for all shares of Common
Stock that are subsequently issued unless otherwise specified by the Board.
Accordingly and subject to adjustment as provided above, two-thirds of a Right
will be issued for each share of Common Stock offered hereby. Until certain
specified conditions exist, the Rights will be represented by the certificates
for the Common Stock and will not be exercisable or transferable apart from
the certificates for the Common Stock.
 
  The Rights have certain anti-takeover effects. The Rights will cause
substantial dilution to a person or group that attempts to acquire the
Corporation without conditioning the offer on a substantial number of Rights
being acquired. The Rights should not interfere with any merger or other
business combination approved by the Board of Directors of the Corporation
since, among other things, the Board of Directors may, at its option, at any
time
 
                                      14
<PAGE>
 
until 10 days (subject to extension) following the date on which a person or
group acquires 20% or more of the outstanding Common Stock, except under
certain circumstances, redeem all but not less than all the then outstanding
Rights at $.02 per Right.
 
  A Rights Agreement dated as of July 27, 1988, between the Corporation and
AmSouth Bank, N.A., as amended, specifies the terms of the Rights and the
foregoing description of the Rights is qualified in its entirety by reference
to such Rights Agreement, which is an exhibit to the Corporation's
Registration Statement on Form 8-A, as amended, File No. 1-7810, dated August
8, 1988, and which is incorporated by reference herein. See "Incorporation of
Certain Documents by Reference".
 
  Limitations on Dividend Payments. The Corporation is subject to several
indentures and other debt instruments which restrict the Corporation's ability
to pay dividends. Under the most restrictive indenture or other debt
instrument, the Corporation is required to maintain a consolidated tangible
net worth of not less than $80,000,000. At September 30, 1997, the Corporation
had a consolidated tangible net worth of approximately $300,900,000 and
therefore, under the indenture restriction, the Corporation could make
dividend payments in respect of its Common Stock of $220,900,000.
 
  Transfer Agent and Registrar. The transfer agent and registrar for the
Common Stock is Harris Trust and Savings Bank, 311 West Monroe Street, 11th
Floor, Chicago, Illinois 60606 . The Company's Common Stock is listed on the
New York Stock Exchange.
 
PREFERRED STOCK
 
  General. Under the Corporation's Restated Certificate of Incorporation, the
Board of Directors is authorized, without further shareholder action, to
provide for the issuance of up to 5,000,000 shares of Preferred Stock, in one
or more series, with such voting powers, or without voting powers, and with
such designations and relative rights and preferences as shall be set forth in
resolutions providing for the issue thereof adopted by the Board of Directors.
It is not possible to state the actual effect of the authorization and
issuance of Preferred Stock upon the rights of holders of the Common Stock
unless and until the Board of Directors determines the attributes of the
Preferred Stock and the specific rights of its holders. Such effects may
include, however, (i) restrictions on dividends on Common Stock if dividends
on Preferred Stock have not been paid; (ii) dilution of the voting power of
Common Stock to the extent that Preferred Stock has voting rights, or to the
extent that any Preferred Stock series is convertible into Common Stock; (iii)
dilution of the equity interest of Common Stock unless Preferred Stock is
redeemed by the Corporation; and (iv) limitation on the right of holders of
Common Stock to share in the Corporation's assets upon liquidation until
satisfaction of any liquidation preference granted to Preferred Stock.
Although the ability of the Corporation to issue Preferred Stock provides
flexibility in connection with possible acquisitions and other corporate
purposes, its issuance could be used to impede an attempt by a third party to
acquire a majority of the outstanding voting stock of the Corporation.
 
  Series A Junior Participating Preferred Stock. In connection with the
adoption of the Shareholder Rights Plan described above, on July 27, 1988, the
Corporation's Board of Directors designated 150,000 shares of the
Corporation's authorized but unissued Preferred Stock as "Series A Junior
Participating Preferred Stock" (the "Series A Preferred Stock"). The terms of
the Series A Preferred Stock are such that one share of Series A Preferred
Stock will be approximately equivalent to 100 shares of Common Stock. Each
1/100th of one share of Series A Preferred Stock has the same dividend and
voting right as one full share of Common Stock, except that, if dividend
payments on the Series A Preferred Stock are in arrears for six consecutive
quarters, the Corporation's ability to pay dividends on its Common Stock is
restricted, and holders of the Series A Preferred Stock will have enhanced
voting rights. In addition each 1/100th of one share of Series A Preferred
Stock has a minimum quarterly dividend of $.05 per 1/100th of one share, a
liquidation preference and certain other rights preferential to Common Stock.
Pursuant to the Shareholder Rights Plan, Rights have been issued to the
Corporation's shareholders, but such Rights have not yet become exercisable
and no shares of Series A Preferred Stock have been issued.
 
                                      15
<PAGE>
 
                             PLAN OF DISTRIBUTION
 
  The Corporation may sell the Offered Securities being offered hereby to
underwriters or through agents or directly to purchasers. The applicable
Prospectus Supplement will set forth the terms of the offering of the Offered
Securities to which such Prospectus Supplement relates, including the name or
names of any underwriters or agents with whom the Corporation has entered into
arrangements with respect to the sale of such Offered Securities, the public
offering or purchase price of such Offered Securities and the net proceeds to
the Corporation from such sale, any underwriting discounts and other items
constituting underwriters' compensation, any discounts and commissions allowed
or paid to dealers, if any, any commissions allowed or paid to agents, and the
securities exchanges, if any, on which the Offered Securities will be listed.
 
  The Offered Securities may be purchased to be re-offered to the public
through underwriting syndicates led by one or more managing underwriters, or
through one or more underwriters. The underwriter or underwriters with respect
to an underwritten offering of the Offered Securities will be named in any
applicable Prospectus Supplement relating to such offering and, if an
underwriting syndicate is used, the managing underwriter or underwriters will
be set forth on the cover page of any applicable Prospectus Supplement. Unless
otherwise set forth in any applicable Prospectus Supplement, the obligations
of the underwriters to purchase the Offered Securities will be subject to
certain conditions precedent, and each of the underwriters with respect to a
sale of Offered Securities will be obligated to purchase all of its allocated
Offered Securities if any are purchased. Any initial public offering price and
any discount or concessions allowed or reallowed or paid to dealers may be
changed from time to time.
 
  Offered Securities may be offered and sold by the Corporation, directly or
through agents designated by the Corporation from time to time, which agents
may be affiliates of the Corporation. Any agent involved in the offer and sale
of the Offered Securities in respect of which this Prospectus is being
delivered will be named, and any commissions payable by the Corporation to
such agent will be set forth, in any applicable Prospectus Supplement. Unless
otherwise indicated in any applicable Prospectus Supplement, any such agent
will be acting on a reasonable efforts basis for the period of its
appointment.
 
  The Debt Securities will be new issues of securities with no established
trading market. Any underwriters to whom such Debt Securities are sold by the
Corporation for public offering and sale may make a market in such Debt
Securities, but such underwriters will not be obligated to do so and may
discontinue any market making at any time without notice. No assurance can be
given as to the liquidity of, or the the trading market for, any Offered
Securities.
 
  Any underwriter or agent participating in the distribution of the Offered
Securities may be deemed to be an underwriter, as that term is defined in the
Securities Act, of the Offered Securities so offered and sold, and any
discounts or commissions received by them from the Corporation and any profit
realized by them on the sale or resale of the Offered Securities may be deemed
to be underwriting discounts and commissions under the Securities Act.
 
  Underwriters, agents and their controlling persons may be entitled, under
agreements entered into with the Corporation, to indemnification by the
Corporation against certain civil liabilities, including liabilities under the
Securities Act or to contribution with respect to payments which the
underwriters or agents may be required to make in respect thereof.
 
                                LEGAL OPINIONS
 
  The legality of the Offered Securities being offered hereby will be passed
upon for the Corporation by Bradley Arant Rose & White LLP, Birmingham,
Alabama, and certain legal matters will be passed upon for any underwriters,
dealers or agents by Winthrop, Stimson, Putnam & Roberts, New York, New York.
As of December 23, 1997, the partners and associates of Bradley Arant Rose &
White LLP beneficially owned approximately 5,000 shares of Common Stock of the
Corporation.
 
                                      16
<PAGE>
 
                                    EXPERTS
 
  The consolidated balance sheets of Energen Corporation and its subsidiaries
as of September 30, 1997 and 1996 and the consolidated statements of income,
shareholders' equity, and cash flows for each of the three years in the period
ending September 30, 1997 and the related financial statement schedule, which
are incorporated by reference or included in the Corporation's Annual Report
on Form 10-K for the year ended September 30, 1997 and which are incorporated
by reference in the Prospectus, have been incorporated herein in reliance on
the report of Coopers & Lybrand L.L.P., independent accountants, given on the
authority of that firm as experts in auditing and accounting.
 
                                      17
<PAGE>
 
                                    PART II
 
                    INFORMATION NOT REQUIRED IN PROSPECTUS
 
ITEM 14. OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION.
 
  The Registrant estimates that the expenses, other than underwriting
commissions and discounts, to be incurred and borne by it in connection with
the proposed sale of the Common Stock and Debt Securities will be as follows:
 
<TABLE>
   <S>                                                            <C>
    Registration fee (not including registration fees previously
    paid)........................................................ $108,704.00
   *Listing fees.................................................   10,000.00
   *Rating Agency fees...........................................   60,000.00
   *Blue Sky expenses............................................    7,500.00
   *Transfer Agent's fees........................................    1,000.00
   *Fees of Trustee, including counsel and authentication fee....    7,500.00
   *Printing expenses............................................   20,000.00
   *Legal fees and expenses......................................  145,000.00
   *Accounting fees..............................................    8,000.00
   *Miscellaneous expenses.......................................   30,000.00
                                                                  -----------
     *Total expenses............................................. $397,704.00
                                                                  ===========
</TABLE>
- --------
* Estimated
 
ITEM 15. INDEMNIFICATION OF DIRECTORS AND OFFICERS.
 
  (a) Article XI of the Registrant's Restated Certificate of Incorporation
provides as follows:
 
  XI. Limitation of Liability:
 
    11.01 A director of the Corporation shall not be liable to the
  Corporation or its shareholders for money damages for any action taken, or
  failure to take action, as a director, except for (i) the amount of a
  financial benefit received by such director to which such director is not
  entitled; (ii) an intentional infliction of harm by such director on the
  Corporation or its shareholders; (iii) a violation of Section 10-2B-8.33 of
  the Code of Alabama of 1975 or any successor provision to such section;
  (iv) an intentional violation by such director of criminal law; or (v) a
  breach of such director's duty of loyalty to the Corporation or its
  shareholders. If the Alabama Business Corporation Act, or any successor
  statute thereto, is hereafter amended to authorize the further elimination
  or limitation of the liability of a director of a corporation, then the
  liability of a director of the Corporation, in addition to the limitations
  on liability provided herein, shall be limited to the fullest extent
  permitted by the Alabama Business Corporation Act, as amended, or any
  successor statute thereto. The limitation on liability of directors of the
  Corporation contained herein shall apply to liabilities arising out of acts
  or omissions occurring subsequent to the adoption of this Article XI and,
  except to the extent prohibited by law, to liabilities arising out of acts
  or omissions occurring prior to the adoption of this Article XI. Any repeal
  or modification of this Article XI by the shareholders of the Corporation
  shall be prospective only and shall not adversely affect any limitation on
  the liability of a director of the Corporation existing at the time of such
  repeal or modification.
 
  (b) Section 2.06 of the Registrant's Bylaws provides as follows:
 
  2.06 Indemnification of Directors and Officers; Liability Insurance--
 
    (a) The Corporation does hereby indemnify any officer or director of the
  Corporation who was, or is, a party, or is threatened to be made a party,
  to any threatened, pending, or completed claim, action, or proceeding,
  whether civil, criminal, administrative, or investigative, including
  appeals, other than an action by or in the right of the Corporation, by
  reason of the fact that he is or was a director, an officer, an employee,
  or an agent of the Corporation or is, or was, serving at the request of the
  Corporation as a director, officer partner, employee, or agent of another
  corporation, partnership, joint venture, trust, or other
 
                                     II-1
<PAGE>
 
  enterprise against expenses, including attorneys' fee, judgments, fines,
  and amounts paid in settlement actually and reasonably incurred by him in
  connection with such action or proceeding if he acted in good faith and in
  a manner he reasonably believed to be in or not opposed to the best
  interests of the Corporation and, with respect to any criminal action or
  proceeding, had no reasonably cause to believe his conduct was unlawful.
  The termination of any action or proceeding by judgment, order, settlement,
  conviction, or upon a plea of nolo contendere, or its equivalent, shall
  not, of itself, create a presumption that the person did not act in good
  faith and in a manner which he reasonably believed to be in or not opposed
  to the best interests of the Corporation and, with respect to any criminal
  action or proceeding, had reasonable cause to believe that his conduct was
  unlawful.
 
    (b) The Corporation does hereby indemnify any officer or director of the
  Corporation who was, or is, a party, or is threatened to be made a party,
  to any threatened, pending, or completed claim or action by, or in the
  right of, the Corporation to procure a judgment in its favor by reason of
  the fact that he is or was a director, an officer, an employee, or an agent
  of the Corporation, or is or was serving at the request of the Corporation
  as a director, officer, partner, employee, or agent of another corporation,
  partnership, joint venture, trust, or other enterprise against expenses,
  including attorneys' fees, actually and reasonably incurred by him in
  connection with the defense or settlement of such action if he acted in
  good faith and in a manner he reasonably believed to be in, or not opposed
  to, the best interests of the Corporation, except that no indemnification
  shall be made in respect of any claim, issue, or matter as to which such
  person shall have been adjudged to be liable for negligence or misconduct
  in the performance of his duty to the Corporation unless, and only to the
  extent that the court in which such action was brought shall determine upon
  application that, despite the adjudication of liability but in view of all
  circumstances of the case, such person is fairly and reasonably entitled to
  indemnity for such expenses which such court shall deem proper.
 
    (c) To the extent that a director or an officer of the Corporation has
  been successful on the merits or otherwise in defense of any action or
  proceeding referred to in subsections (a) and (b) of this section or in
  defense of any claim, issue, or matter therein, he shall be indemnified
  against expenses, including attorneys' fees, actually and reasonably
  incurred by him in connection therewith, notwithstanding that he has not
  been successful on any other claim, issue, or matter in any such action or
  proceeding.
 
    (d) Any indemnification under subsections (a) and (b) of this section,
  unless ordered by a court, shall be made by the Corporation only as
  authorized in the specific case upon a determination that indemnification
  of the director or officer is proper in the circumstances because he has
  met the applicable standard of conduct set forth in subsections (a) and (b)
  of this section. Such determination shall be made:
 
      (i) By the Board of Directors by a majority vote of a quorum
    consisting of directors who were not parties to, or who have been
    wholly successful on the merits or otherwise with respect to, such
    claim, action, or proceeding;
 
      (ii) If such a quorum is not obtainable, or even if obtainable a
    quorum of disinterested directors so directs, by independent legal
    counsel in a written opinion; or
 
      (iii) By the stockholders.
 
    (e) Expenses, including attorneys' fees, incurred in defending a civil or
  criminal claim, action, or proceeding may be paid by the Corporation in
  advance of the final disposition of such claim, action, or proceeding as
  authorized in the manner provided in subsection (d) of this section upon
  receipt of an undertaking by or on behalf of the director or officer to
  repay such amount if, and to the extent that, it shall ultimately be
  determined that he is not entitled to be indemnified by the Corporation as
  authorized in this section.
 
    (f) The indemnification authorized by this section shall not be deemed
  exclusive of, and shall be in addition to, any other rights, whether
  created prior or subsequent to the enactment of this section, to which
  those indemnified may be entitled under any statute, rule of law, provision
  of articles of incorporation, by-law, agreement, or vote of stockholders or
  disinterested directors, or otherwise, both as to action in his official
  capacity and as to action in another capacity while holding such office and
  shall continue as to a person who has ceased to be a director or an
  officer, and shall inure to the benefit of the heirs, executors, and
  administrators of such a person.
 
                                     II-2
<PAGE>
 
    (g) The Corporation shall have power to purchase and maintain insurance
  on behalf of any person who is or was a director or an officer of the
  Corporation, or is or was serving at the request of the Corporation as a
  director, officer, partner, employee, or agent of another corporation,
  partnership, joint venture, trust, or other enterprise against any
  liability asserted against him and incurred by him in any such capacity or
  arising out of his status as such, whether or not the Corporation would
  have the power to indemnify him against such liability under the provisions
  of this section."
 
  (c) In addition to the foregoing provisions of the Bylaws of the Registrant,
directors, officers and controlling persons of the Registrant may be
indemnified by the Registrant pursuant to the provisions of Sections 10-2B-
8.50 to 10-2B-8.58 of the Code of Alabama of 1975, as amended, which indemnity
may be broader than that provided by the Registrant's Bylaws.
 
  (d) In addition, the Registrant maintains officers' and directors' liability
insurance.
 
ITEM 16. EXHIBITS
 
<TABLE>
<CAPTION>
 EXHIBIT NO.                             DESCRIPTION
 -----------                             -----------
 <C>         <S>
 1(a)        Form of Selling Agency Agreement.
 1(b)        Form of Common Stock Underwriting Agreement.
 *4(a)       Restated Conformed Certificate of Incorporation of the Registrant,
             as amended through February 3, 1995, which was filed as Exhibit
             3(f) to the Registrant's Annual Report on Form 10-K for the year
             ended September 30, 1995 (File No. 1-7810).
 *4(b)       Certificate of Adoption of Resolutions Designating Series A Junior
             Participating Preferred Stock, adopted June 27, 1988, which was
             filed as Exhibit 4(e) to the Registrant's Registration Statement
             on Form S-2 (Registration No. 33-25435).
 *4(c)       Bylaws of the Registrant, which were filed as Exhibit 4(e) to the
             Registrant's Registration Statement on Form S-8 (Registration No.
             33-14855).
 *4(d)       Rights Agreement, dated as of July 27, 1988, between Energen
             Corporation and AmSouth Bank N.A., Rights Agent, which was filed
             as Exhibit I to the Registrant's Registration Statement on Form 8-
             A (File No. 1-7810).
 *4(e)       Amendment of Rights Agreement, dated as of February 28, 1990,
             between Energen Corporation and AmSouth Bank N.A., Rights Agent,
             which was filed as Exhibit 2 to Registrant's Form 8 Amendment No.
             2 to its Registration Statement on Form 8-A (File No. 1-7810).
 *4(f)       Indenture, dated as of January 1, 1992, between the Registrant and
             Boatmen's Trust Company, Trustee, which was filed as Exhibit 4 to
             the Registrant's Registration Statement on Form S-3 (Registration
             No. 33-44936).
 *4(g)       Indenture, dated as of March 1, 1993, between the Registrant and
             Boatman's Trust Company, Trustee, which was filed as Exhibit 4 to
             the Registrant's Registration Statement on Form S-3 (Registration
             No. 33-25435).
 *4(h)       Indenture dated as of November 1, 1993, between Alabama Gas
             Corporation and NationsBank of Georgia, National Association,
             Trustee, which was filed as Exhibit 4(k) to Alabama Gas's
             Registration Statement on Form S-3 (Registration No. 33-70466).
 4(i)        Indenture between Energen Corporation and The Bank of New York, as
             Trustee, dated as of September 1, 1996, with respect to the Debt
             Securities.
 5           Opinion of Bradley Arant Rose & White LLP.
 12          Computation of Ratios of Earnings to Fixed Charges.
 23(a)       Consent of Bradley Arant Rose & White LLP (contained in their
             opinion filed as Exhibit 5 to this Registration Statement).
 23(b)       Consent of Coopers & Lybrand L.L.P.
 24          Power of attorney authorizing execution of registration statement
             on Form S-3 on behalf of certain directors of the Registrant.
 25          Statement of Eligibility and Qualification of the Trustee under
             the Trust Indenture Act of 1939 on Form T-1.
</TABLE>
- --------
* Incorporated by reference.
 
                                     II-3
<PAGE>
 
ITEM. 17. UNDERTAKINGS.
 
  (a) 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 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 the undertakings set forth in paragraphs (1)(i)
  and (1)(ii) above do not apply if the registration statement is on Form S-
  3, Form S-8, or Form F-3, and the information required to be included in a
  post-effective amendment by those paragraphs is contained in periodic
  reports filed with or furnished to the Commission by the registrant
  pursuant to section 13 or section 15(d) of the Securities Exchange Act of
  1934 that are incorporated by reference in this 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.
 
    (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.
 
  (b) The undersigned registrant hereby undertakes that, for the 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 (and, where applicable, each filing of any
employee benefit plan's annual report pursuant to 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 herein, and the offering of such securities
at that time shall be deemed to be the initial bona fide offering thereof.
 
  (c) 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 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 Act, and is, therefore, unenforceable. In the event
that a claim for indemnification against such labilities (other than the
payment by the registrant of expenses incurred or paid by a director, officer
or controlling person of such registrant in the successful defense of any
action, suit or proceeding) is asserted against the registrant 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 Act and will be governed by the
final adjudication of such issue.
 
                                     II-4
<PAGE>
 
  (d) The undersigned Registrant hereby undertakes that, (1) for purposes of
determining any liability under the Securities Act of 1933, the information
omitted from the form of prospectus filed as a part of this Registration
Statement in reliance upon rule 430A and contained in a form of prospectus
filed pursuant to Rules 424(b)(1) or (4) or 497(h) under the Securities Act
shall be deemed to be a part of this Registration Statement at the time it was
declared effective, and (2) for the purpose of determining any liability under
the Securities Act of 1933, each post-effective amendment if that contains a
form of prospectus 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-5
<PAGE>
 
                                  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 BIRMINGHAM, STATE OF ALABAMA, ON DECEMBER 23, 1997.
 
                                          Energen Corporation
 
                                                  /s/ Geoffrey C. Ketcham
                                          By: _________________________________
                                                    GEOFFREY C. KETCHAM
                                               ITS EXECUTIVE VICE PRESIDENT,
                                                       TREASURER AND
                                                  CHIEF FINANCIAL OFFICER
 
  PURSUANT TO THE REQUIREMENTS OF THE SECURITIES ACT OF 1933, THIS
REGISTRATION STATEMENT HAS BEEN SIGNED BELOW BY THE FOLLOWING PERSONS IN THE
CAPACITIES AND ON THE DATES INDICATED.
 
              SIGNATURE                        TITLE                 DATE
 
                  *                    Director                  December 23,
- -------------------------------------                                1997
           STEPHEN D. BAN
 
                  *                    Director                  December 23,
- -------------------------------------                                1997
          JULIAN W. BANTON
 
                  *                    Director                  December 23,
- -------------------------------------                                1997
             R. D. CASH
 
                  *                    Director                  December 23,
- -------------------------------------                                1997
         J. MASON DAVIS, JR.
 
                  *                    Director                  December 23,
- -------------------------------------                                1997
         JAMES S. M. FRENCH
 
       /s/ Geoffrey C. Ketcham         Executive Vice            December 23,
- -------------------------------------   President,                   1997
         GEOFFREY C. KETCHAM            Treasurer and Chief
                                        Financial Officer
                                        (Principal
                                        Accounting Officer)
 
                  *
                                                                 December 23,
- -------------------------------------                                1997
          WALLACE L. LUTHY
 
                  *                    Chairman of the           December 23,
- -------------------------------------   Board and Director           1997
           REX J. LYSINGER
 
                                     II-6
<PAGE>
 
              SIGNATURE                         TITLE                DATE
 
                  *                     Director                 December 23,
- -------------------------------------                                1997
           JUDY M. MERRITT
 
                  *                     Director                 December 23,
- -------------------------------------                                1997
         DRAYTON NABERS, JR.
 
                  *                     Director                 December 23,
- -------------------------------------                                1997
          GEORGE S. SHIRLEY
 
                  *                     President, Chief         December 23,
- -------------------------------------    Executive Officer           1997
       WM. MICHAEL WARREN, JR.           and Director
 
       /s/ Geoffrey C. Ketcham
  *By:_______________________________                            December 23,
        GEOFFREY C. KETCHAM,                                         1997
          ATTORNEY-IN-FACT
 
                                      II-7
<PAGE>
 
           REGISTRATION STATEMENT ON FORM S-3 OF ENERGEN CORPORATION
 
                               ----------------
 
                               INDEX OF EXHIBITS
 
<TABLE>
<CAPTION>
 EXHIBIT
 NUMBER                                DESCRIPTION
 -------                               -----------
 <C>     <S>
   1(a)  Form of Selling Agency Agreement.
   1(b)  Form of Common Stock Underwriting Agreement.
  *4(a)  Restated Conformed Certificate of Incorporation of the Registrant, as
         amended through February 3, 1995, which was filed as Exhibit 3(f) to
         the Registrant's Annual Report on Form 10-K for the year ended
         September 30, 1995 (File No. 1-7810).
  *4(b)  Certificate of Adoption of Resolutions Designating Series A Junior
         Participating Preferred Stock, adopted June 27, 1988, which was filed
         as Exhibit 4(e) to the Registrant's Registration Statement on Form S-2
         (Registration No. 33-25435).
  *4(c)  Bylaws of the Registrant, which were filed as Exhibit 4(e) to the
         Registrant's Registration Statement on Form S-8 (Registration No. 33-
         14855).
  *4(d)  Rights Agreement, dated as of July 27, 1988, between Energen
         Corporation and AmSouth Bank N.A., Rights Agent, which was filed as
         Exhibit I to the Registrant's Registration Statement on Form 8-A (File
         No. 1-7810).
  *4(e)  Amendment of Rights Agreement, dated as of February 28, 1990, between
         Energen Corporation and AmSouth Bank N.A., Rights Agent, which was
         filed as Exhibit 2 to Registrant's Form 8 Amendment No. 2 to its
         Registration Statement on Form 8-A (File No. 1-7810).
  *4(f)  Indenture, dated as of January 1, 1992, between the Registrant and
         Boatmen's Trust Company, Trustee, which was filed as Exhibit 4 to the
         Registrant's Registration Statement on Form S-3 (Registration No. 33-
         44936).
  *4(g)  Indenture, dated as of March 1, 1993, between the Registrant and
         Boatman's Trust Company, Trustee, which was filed as Exhibit 4 to the
         Registrant's Registration Statement on Form S-3 (Registration No. 33-
         25435).
  *4(h)  Indenture dated as of November 1, 1993, between Alabama Gas
         Corporation and NationsBank of Georgia, National Association, Trustee,
         which was filed as Exhibit 4(k) to Alabama Gas's Registration
         Statement on Form S-3 (Registration No. 33-70466).
   4(i)  Indenture between Energen Corporation and The Bank of New York, as
         Trustee, dated as of September 1, 1996, with respect to the Debt
         Securities.
   5     Opinion of Bradley Arant Rose & White LLP.
  12     Computation of Ratios of Earnings to Fixed Charges.
  23(a)  Consent of Bradley Arant Rose & White LLP (contained in their opinion
         filed as Exhibit 5 to this Registration Statement).
  23(b)  Consent of Coopers & Lybrand L.L.P.
  24     Power of attorney authorizing execution of registration statement on
         Form S-3 on behalf of certain directors of the Registrant.
  25     Statement of Eligibility and Qualification of the Trustee under the
         Trust Indenture Act of 1939 on Form T-1.
</TABLE>
- --------
* Incorporated by reference.

<PAGE>
 
                                                                    Exhibit 1(a)



                              Energen Corporation

                  $____________ Medium-Term Notes, Series [_]
                  Due Nine Months or More from Date of Issue

                       Form of Selling Agency Agreement


                                                              ____________, 199_
                                                              New York, New York



[Agent's Name]
[Agent's Address]


Dear Sirs:

        Energen Corporation, an Alabama corporation (the "Company"), confirms
its agreement with each of you with respect to the issue and sale by the Company
of up to $___________ aggregate principal amount of its Medium-Term Notes,
Series A Due Nine Months or More from Date of Issue (the "Notes"). The Notes
will be issued under an indenture (the "Indenture") dated as of ____________,
1998 between the Company and The Bank of New York, as trustee (the "Trustee").
Unless otherwise specifically provided for and set forth in a Pricing Supplement
(as defined below), the Notes will be issued in minimum denominations of $1,000
and in denominations exceeding such amount by integral multiples of $1,000, will
be issued only in fully registered form and will have the interest rates,
maturities and, if applicable, other terms set forth in such Pricing Supplement.
The Notes will be issued, and the terms thereof established, in accordance with
the Indenture and the Medium-Term Notes Administrative Procedures attached
hereto as Exhibit A (the "Procedures") (unless a Terms Agreement (as defined in
Section 2(b)) modifies or otherwise supersedes such Procedures with respect to
the Notes issued pursuant to such Terms Agreement). The Procedures may be
amended only by written agreement of the Company and you after notice to, and
with the approval of, the Trustee. For the purposes of this Agreement, the term
"Agent" shall refer to any of you acting solely in the capacity as agent for the
Company pursuant to Section 2(a) and not as principal (collectively, the
"Agents"), the term "Purchaser" shall refer to one of you acting solely as
principal pursuant to Section 2(b) and not as agent, and the term "you" shall
<PAGE>
 
refer to you collectively whether at any time any of you is acting in both such
capacities or in either such capacity. In acting under this Agreement, in
whatever capacity, each of you is acting individually and not jointly.

        1. Representations and Warranties. The Company represents and warrants
           ------------------------------
to, and agrees with, you as set forth below in this Section 1. Certain terms
used in this Section 1 are defined in paragraph (d) hereof.

        (a) The Company meets the requirements for use of Form S-3 under the
    Securities Act of 1933 (the "Act"), and has filed with the Securities and
    Exchange Commission (the "Commission") a registration statement on such Form
    (File Number: 33-_____), including a basic prospectus, which has become
    effective, for the registration under the Act of $400,000,000 aggregate
    principal amount of debt and equity securities (the "Securities"), including
    the Notes. Such registration statement, as amended at the date of this
    Agreement, meets the requirements set forth in Rule 415(a)(1)(ix) or (x)
    under the Act and complies in all other material respects with said Rule.
    The Company has included in such registration statement, or has filed or
    will file with the Commission pursuant to the applicable paragraph of Rule
    424(b) under the Act, a supplement or supplements to the form of prospectus
    included in such registration statement relating to the Notes and the plan
    of distribution thereof (the "Prospectus Supplement"). In connection with
    the sale of Notes, the Company proposes to file with the Commission pursuant
    to the applicable paragraph of Rule 424(b) under the Act further supplements
    to the Prospectus Supplement (each a "Pricing Supplement") specifying the
    interest rates, maturity dates and, if appropriate, other similar terms of
    the Notes sold pursuant hereto or the offering thereof.

        (b) As of the Execution Time, on the Effective Date, when any supplement
    to the Prospectus is filed with the Commission, as of the date of a Terms
    Agreement and at the date of delivery by the Company of any Notes sold
    hereunder (a "Closing Date"), (i) the Registration Statement, as amended as
    of any such time, and the Prospectus, as supplemented as of any such time,
    and the Indenture will comply in all material respects with the applicable
    requirements of the Act, the Trust Indenture Act of 1939 (the "Trust
    Indenture Act") and the Securities Exchange Act of 1934 (the "Exchange Act")
    and the respective rules thereunder; (ii) the Registration Statement, as
    amended as of any such time, did not or will not contain any untrue
    statement of a material fact or omit to state any material fact required to
    be stated therein or necessary in order to make the statements therein not
    misleading; and (iii) the Prospectus, as supplemented as of any such time,
    will not contain any untrue statement of a material fact or omit 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;
    provided, however, that the Company makes no representations or warranties
    --------  -------
    as to (i) that part of the Registration Statement which shall constitute the
    Statement of Eligibility and Qualification (Form T-l) under the Trust
    Indenture Act of the Trustee or (ii) the information contained in or omitted
    from the Registration Statement or the Prospectus (or any supplement
    thereto) in reliance upon and in conformity with information furnished in
    writing to the Company by any of you specifically for inclusion in the
    Registration Statement or the Prospectus (or any supplement thereto).

                                       2
<PAGE>
 
        (c) As of the time any Notes are issued and sold hereunder, the
    Indenture will constitute a legal, valid and binding instrument enforceable
    against the Company in accordance with its terms (except insofar as
    enforcement may be limited by applicable bankruptcy, reorganization,
    fraudulent conveyance, insolvency or other laws affecting creditors' rights
    and remedies generally, as may from time to time be in effect, and by the
    availability of specific performance or of other equitable relief which is
    subject to the discretion of the court before which any proceeding may be
    brought) and such Notes will have been duly authorized, executed,
    authenticated and, when paid for by the purchasers thereof, will constitute
    legal, valid and binding obligations of the Company entitled to the benefits
    of the Indenture.

        (d) The terms which follow, when used in this Agreement, shall have the
    meanings indicated. The term "the Effective Date" shall mean each date that
    the Registration Statement and any post-effective amendment or amendments
    thereto became or become effective and each date after the date hereof on
    which a document incorporated by reference in the Registration Statement is
    filed. "Execution Time" shall mean the date and time that this Agreement is
    executed and delivered by the parties hereto. "Basic Prospectus" shall mean
    the form of basic prospectus relating to the Securities contained in the
    Registration Statement at the Effective Date (unless such basic prospectus
    has been amended by the Company subsequent to the Effective Date, in which
    case "Basic Prospectus" shall mean the form of basic prospectus as so
    amended, whether or not filed with the Commission pursuant to Rule 424(b)).
    "Prospectus" shall mean the Basic Prospectus as supplemented by the
    Prospectus Supplement. "Registration Statement" shall mean the registration
    statement referred to in paragraph (a) above, including incorporated
    documents, exhibits and financial statements, as amended at the Execution
    Time. "Rule 415" and "Rule 424" refer to such rules under the Act. Any
    reference herein to the Registration Statement, the Basic Prospectus, the
    Prospectus Supplement 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 which were filed under the Exchange Act on or before the
    Effective Date of the Registration Statement or the issue date of the Basic
    Prospectus, the Prospectus Supplement or the Prospectus, as the case may be;
    and any reference herein to the terms "amend", "amendment" or "supplement"
    with respect to the Registration Statement, the Basic Prospectus, the
    Prospectus Supplement or the Prospectus shall be deemed to refer to and
    include the filing of any document under the Exchange Act after the
    Effective Date of the Registration Statement or the issue date of the Basic
    Prospectus, the Prospectus Supplement or the Prospectus, as the case may be,
    deemed to be incorporated therein by reference.

        (e) Neither the Company nor Alabama Gas Corporation nor Taurus
    Exploration, Inc. nor Taurus Exploration U.S.A., Inc. (individually a
    "Subsidiary" and collectively the "Subsidiaries") is in violation of its
    charter or by-laws or in default in the performance or observance of any
    material obligation, agreement, covenant or condition contained in any
    contract, agreement or other instrument to which it is a party or by which
    it may be bound, the effect of which is material to the Company or either of

                                       3
<PAGE>
 
    the Subsidiaries, and neither the execution or delivery of this Agreement,
    the consummation of the transactions herein contemplated, the fulfillment of
    the terms hereof or of the Indenture or the Notes, nor compliance with the
    terms and provisions hereof or of the Indenture or the Notes will conflict
    with, or result in a breach of, or constitute a default under (i) the
    articles of incorporation, by-laws, or any contract, agreement or other
    instrument to which the Company or any of the Subsidiaries is a party or by
    which it may be bound or (ii) any law, order, rule or regulation applicable
    to the Company or any of the Subsidiaries of any court or any federal or
    state governmental body having jurisdiction over the Company or any of the
    Subsidiaries or over their respective properties.

        (f) The Indenture has been duly authorized, executed and delivered and
    constitutes a legal, valid and binding instrument enforceable against the
    Company in accordance with its terms (subject, as to enforcement of
    remedies, to applicable bankruptcy, reorganization, insolvency, moratorium,
    fraudulent conveyance or other laws affecting creditors' rights generally
    from time to time in effect, and by the availability of specific performance
    or of other equitable relief which is subject to the discretion of the court
    before which any proceeding may be brought) and has been qualified under the
    Trust Indenture Act.

        (g) Up to an aggregate principal amount of $__________ of the Notes have
    been duly authorized and, when executed and authenticated in accordance with
    the provisions of the Indenture and delivered and paid for by the purchasers
    thereof, will constitute legal, valid and binding obligations of the Company
    and will be entitled to the benefits of the Indenture.

        (h) Neither the execution or delivery of this Agreement, the
    consummation of the transactions herein contemplated, the fulfillment of the
    terms hereof or of the Indenture or the Notes, nor compliance with the terms
    and provisions hereof or of the Indenture or the Notes requires any consent,
    approval, authorization or order of any court or governmental agency or
    body, except such as may as have been obtained under the Act and the Trust
    Indenture Act and such as may be required under the blue sky laws of any
    jurisdiction in connection with the sale of the Notes as contemplated by
    this Agreement.

        (i) The Company has filed an annual exemption statement on Form U-3A-2
    pursuant to Rule 2 under the Public Utility Holding Company Act of 1935 (the
    "1935 Act"), and the Company is exempt from all of the provisions of the
    1935 Act except Section 9(a)(2) thereof and has received no notice, request
    or inquiry from the Commission terminating or threatening to terminate or
    questioning such exemption.


                                       4
<PAGE>
 
        2. Appointment of Agents; Solicitation by the Agents of Offers to
           --------------------------------------------------------------
Purchase; Sales of Notes to a Purchaser. (a) Subject to the terms and conditions
- ---------------------------------------
set forth herein, the Company hereby authorizes each of the Agents to act as its
agent to solicit offers for the purchase of all or part of the Notes from the
Company.

        On the basis of the representations and warranties, and subject to the
terms and conditions set forth herein, each of the Agents agrees, as agent of
the Company, to use its reasonable efforts to solicit offers to purchase the
Notes from the Company upon the terms and conditions set forth in the Prospectus
(and any supplement thereto) and in the Procedures. Each Agent shall make
reasonable efforts to assist the Company in obtaining performance by each
purchaser whose offer to purchase Notes has been solicited by such Agent and
accepted by the Company, but such Agent shall not, except as otherwise provided
in this Agreement, be obligated to disclose the identity of any purchaser or
have any liability to the Company in the event any such purchase is not
consummated for any reason. Except as provided in Section 2(b), under no
circumstances will any Agent be obligated to purchase any Notes for its own
account. It is understood and agreed, however, that any Agent may purchase Notes
as principal pursuant to Section 2(b).

        The Company reserves the right, in its sole discretion, to instruct the
Agents to suspend at any time, for any period of time or permanently, the
solicitation of offers to purchase Notes. Upon receipt of instructions from the
Company, the Agents will forthwith suspend solicitation of offers to purchase
Notes from the Company until such time as the Company has advised them that such
solicitation may be resumed. During the period of any such suspension or
suspensions, the Company shall be relieved of its obligation to provide to the
Agents the information, documents, certificates, opinions and letter required
pursuant to Sections 4(g), 4(j), 4(k) and 4(l) hereof. However, whenever such a
suspension is lifted, the Company shall be required to deliver to the Agents,
prior to the resumption of any sale of Securities hereunder, the most recent
information, documents, certificates, opinions and letter which would have been
required except for the suspension.

        The Company agrees to pay each Agent a commission, on the Closing Date
with respect to each sale of Notes by the Company as a result of a solicitation
made by such Agent, in an amount equal to that percentage specified in Schedule
I hereto of the aggregate principal amount of the Notes sold by the Company.
Such commission shall be payable as specified on Schedule I or in the applicable
Terms Agreement.

        Subject to the provisions of this Section and to the Procedures, offers
for the purchase of Notes may be solicited by an Agent as agent for the Company
at such time and in such amounts as such Agent deems advisable. The Company may
from time to time offer Notes for sale otherwise than through an Agent;
provided, however, that so long as this Agreement is in effect the Company shall
- --------  -------
not solicit or accept offers to purchase Notes through any agent other than an
Agent.

        If the Company shall default in its obligations to deliver Notes to a
purchaser whose offer it has accepted, the Company shall indemnify and hold each
of you harmless against any loss, claim or damage arising from or as a result of
such default by the Company.

                                       5
<PAGE>
 
        (b) Subject to the terms and conditions stated herein, whenever the
Company and any Agent determine that the Company shall sell Notes directly to
such Agent as Purchaser, such Agent will notify the Company and each such sale
of Notes shall be made in accordance with the terms of this Agreement and a
supplemental agreement relating to such sale. Each such supplemental agreement
(which may be either an oral or written agreement) is herein referred to as a
"Terms Agreement". Each Terms Agreement shall describe the Notes to be purchased
by the Purchaser pursuant thereto and shall specify the aggregate principal
amount of such Notes, the price to be paid to the Company for such Notes, the
maturity date of such Notes, the rate at which interest will be paid on such
Notes, the dates on which interest will be paid on such Notes and the record
date with respect to each such payment of interest, the Closing Date for the
purchase of such Notes, the place of delivery of the Notes and payment therefor,
the method of payment and any requirements for the delivery of opinions of
counsel, certificates from the Company or its officers or a letter from the
Company's independent public accountants as described in Section 6(b). Any such
Terms Agreement may also specify the period of time referred to in Section 4(m).
Any written Terms Agreement may be in the form attached hereto as Exhibit B. The
Purchaser's commitment to purchase Notes shall be deemed to have been made on
the basis of the representations and warranties of the Company herein contained
and shall be subject to the terms and conditions herein set forth.

        Delivery of the certificates for Notes sold to the Purchaser pursuant to
a Terms Agreement shall be made not later than the Closing Date agreed to in
such Terms Agreement, against payment of funds to the Company in the net amount
due to the Company for such Notes by the method and in the form set forth in the
Procedures, unless otherwise agreed to between the Company and the Purchaser in
such Terms Agreement.

        Unless otherwise agreed to between the Company and the Purchaser in a
Terms Agreement, any Note sold to a Purchaser (i) shall be purchased by such
Purchaser at a price equal to 100% of the principal amount thereof less a
percentage equal to the commission applicable to an agency sale of a Note of
identical maturity and (ii) may be resold by such Purchaser at varying prices
from time to time or, if set forth in the applicable Terms Agreement and Pricing
Supplement, at a fixed public offering price. In connection with any resale of
Notes purchased, a Purchaser may use a selling or dealer group and may reallow
to any broker or dealer any portion of the discount or commission payable
pursuant hereto.

        3. Offering and Sale of Notes. Each Agent and the Company agree to
           --------------------------
perform the respective duties and obligations specifically provided to be
performed by them in the Procedures.

        4.  Agreements.  The Company agrees with you that:
            ----------
        (a) Prior to the termination of the offering of the Notes (including by
    way of resale by a Purchaser of Notes), the Company will not file any
    amendment of the Registration Statement or supplement to the Prospectus
    (except for (i) periodic or current reports filed under the Exchange Act,
    (ii) a supplement relating to any offering of Notes providing solely for the
    specification of or a change in pricing information including the maturity

                                       6
<PAGE>
 
    dates, interest rates, issuance prices or other similar terms of any Notes
    or (iii) a supplement relating to an offering of Securities other than the
    Notes) unless the Company has furnished each of you a copy for your review
    prior to filing and given each of you a reasonable opportunity to comment on
    any such proposed amendment or supplement. Subject to the foregoing
    sentence, the Company will cause each supplement to the Prospectus to be
    filed with the Commission pursuant to the applicable paragraph of Rule
    424(b) within the time period prescribed and will provide evidence
    satisfactory to you of such filing. The Company will promptly advise each of
    you (i) when the Prospectus, and any supplement thereto, shall have been
    filed with the Commission pursuant to Rule 424(b), (ii) when, prior to
    termination of any offering of Notes, any amendment of the Registration
    Statement shall have been filed or become effective, (iii) of any request by
    the Commission for any amendment of the Registration Statement or supplement
    to the Prospectus or for any additional information, (iv) of the issuance by
    the Commission of any stop order suspending the effectiveness of the
    Registration Statement or the institution or threatening of any proceeding
    for that purpose and (v) of the receipt by the Company of any notification
    with respect to the suspension of the qualification of the Notes for sale in
    any jurisdiction or the initiation or threatening of any proceeding for such
    purpose. The Company will use its reasonable efforts to prevent the issuance
    of any such stop order and, if issued, to obtain as soon as possible the
    withdrawal thereof.

        (b) If, at any time when a prospectus relating to the Notes is required
    to be delivered under the Act, any event occurs as a result of which the
    Prospectus as then supplemented would include any untrue statement of a
    material fact or omit to state any material fact necessary to make the
    statements therein, in the light of the circumstances under which they were
    made, not misleading, or if it shall be necessary to amend the Registration
    Statement or to supplement the Prospectus to comply with the Act or the
    Exchange Act or the respective rules thereunder, the Company promptly will
    (i) notify each of you to suspend solicitation of offers to purchase Notes
    (and, if so notified by the Company, each of you shall forthwith suspend
    such solicitation and cease using the Prospectus as then supplemented), (ii)
    prepare and file with the Commission, subject to the first sentence of
    paragraph (a) of this Section 4, an amendment or supplement which will
    correct such statement or omission or effect such compliance and (iii)
    supply any supplemented Prospectus to each of you in such quantities as you
    may reasonably request. If such amendment or supplement, and any documents,
    certificates and opinions furnished to each of you pursuant to paragraph (g)
    of this Section 4 in connection with the preparation or filing of such
    amendment or supplement are satisfactory in all respects to you, you will,
    upon the filing of such amendment or supplement with the Commission and upon
    the effectiveness of an amendment to the Registration Statement, if such an
    amendment is required, resume your obligation to solicit offers to purchase
    Notes hereunder.

        (c) The Company, during the period when a prospectus relating to the
    Notes is required to be delivered under the Act, will file promptly all
    documents required to be filed with the Commission pursuant to Section
    13(a), 13(c), 14 or 15(d) of the Exchange Act and will furnish to each of
    you copies of such documents. In addition, on or prior to the date on which
    the Company makes any announcement to the general public concerning earnings

                                       7
<PAGE>
 
    or concerning any other event which is required to be described, or which
    the Company proposes to describe, in a document filed pursuant to the
    Exchange Act, the Company will furnish to each of you the information
    contained or to be contained in such announcement. The Company also will
    furnish to each of you copies of all press releases or announcements
    furnished to news or wire services and any other material press releases and
    announcements. The Company will promptly notify each of you of (i) any
    decrease in the rating of the Notes or any other debt securities of the
    Company by any "nationally recognized statistical rating organization" (as
    defined for purposes of Rule 436(g) under the Act) or (ii) any notice given
    of any intended or potential decrease in any such rating or of a possible
    change in any such rating that does not indicate the direction of the
    possible change, as soon as the Company learns of any such decrease or
    notice.

        (d) As soon as practicable, the Company will make generally available to
    its security holders and to each of you an earnings statement or statements
    of the Company and its subsidiaries which will satisfy the provisions of
    Section 11(a) of the Act and Rule 158 under the Act.

        (e) The Company will furnish to each of you and your counsel, without
    charge, copies of the Registration Statement (including exhibits thereto)
    and, so long as delivery of a prospectus may be required by the Act, as many
    copies of the Prospectus and any supplement thereto as you may reasonably
    request.

        (f) The Company will arrange for the qualification of the Notes for sale
    under the laws of such jurisdictions as any of you may designate, will
    maintain such qualifications in effect so long as required for the
    distribution of the Notes, and will arrange for the determination of the
    legality of the Notes for purchase by institutional investors; provided that
    in no event shall the Company be obligated to qualify to do business in any
    jurisdiction where it is not now so qualified or to take any action which
    would subject it to service of process in suits, other than those arising
    out of the offering or sale of the Notes, in any jurisdiction where it is
    not now so subject.

        (g) The Company shall furnish to each of you such information,
    documents, certificates of officers of the Company and opinions of counsel
    for the Company relating to the business, operations and affairs of the
    Company, the Registration Statement, the Prospectus, and any amendments
    thereof or supplements thereto, the Indenture, the Notes, this Agreement,
    the Procedures and the performance by the Company and you of its and your
    respective obligations hereunder and thereunder as any of you may from time
    to time and at any time prior to the termination of this Agreement
    reasonably request.

        (h) The Company shall, whether or not any sale of the Notes is
    consummated, (i) pay all expenses incident to the performance of its
    obligations under this Agreement and any Terms Agreement, including the fees
    and disbursements of its accountants and counsel, the cost of printing or
    other production and delivery of the Registration Statement, the Prospectus,
    all amendments thereof and supplements thereto, the Indenture, this

                                       8
<PAGE>
 
    Agreement, any Terms Agreement and all other documents relating to the
    offering, the cost of preparing, printing, packaging and delivering the
    Notes, the fees and disbursements, including fees of counsel, incurred in
    compliance with Section 4(f), the fees and disbursements of the Trustee and
    the fees of any agency that rates the Notes, (ii) reimburse each of you as
    requested for all out-of-pocket expenses (including without limitation
    advertising expenses), if any, incurred by you in connection with this
    Agreement and (iii) pay the fees and expenses of your counsel incurred in
    connection with this Agreement.

        (i) Each acceptance by the Company of an offer to purchase Notes will be
    deemed to be an affirmation that its representations and warranties
    contained in this Agreement are true and correct at the time of such
    acceptance, as though made at and as of such time, and a covenant that such
    representations and warranties will be true and correct at the time of
    delivery to the purchaser of the Notes relating to such acceptance, as
    though made at and as of such time (it being understood that for purposes of
    the foregoing affirmation and covenant such representations and warranties
    shall relate to the Registration Statement and Prospectus as amended or
    supplemented at each such time). Each such acceptance by the Company of an
    offer for the purchase of Notes shall be deemed to constitute an additional
    representation, warranty and agreement by the Company that, as of the
    settlement date for the sale of such Notes, after giving effect to the
    issuance of such Notes, of any other Notes to be issued on or prior to such
    settlement date and of any other Securities to be issued and sold by the
    Company on or prior to such settlement date, the aggregate amount of
    Securities (including any Notes) which have been issued and sold by the
    Company will not exceed the lesser of the principal amount of Securities
    registered pursuant to the Registration Statement and the limit of the
    bonded indebtedness of the Company as approved from time to time by the
    Company's shareholders. The Company will inform you promptly upon your
    request of the aggregate amount of Securities registered under the
    Registration Statement which remain unsold.

        (j) Each time that the Registration Statement or the Prospectus is
    amended or supplemented (other than by an amendment or supplement relating
    to any offering of Securities other than the Notes or providing solely for
    the specification of or a change in the maturity dates, the interest rates,
    the issuance prices or other similar terms of any Notes sold pursuant
    hereto), the Company will deliver or cause to be delivered promptly to each
    of you a certificate of the Company, signed by the Chairman of the Board or
    the President and the principal financial or accounting officer of the
    Company, dated the date of the effectiveness of such amendment or the date
    of the filing of such supplement, in form reasonably satisfactory to you, of
    the same tenor as the certificate referred to in Section 5(d) but modified
    to relate to the last day of the fiscal quarter for which financial
    statements of the Company were last filed with the Commission and to the
    Registration Statement and the Prospectus as amended and supplemented to the
    time of the effectiveness of such amendment or the filing of such
    supplement.

        (k) Each time that the Registration Statement or the Prospectus is
    amended or supplemented (other than by an amendment or supplement (i)
    relating to any offering of Securities other than the Notes, (ii) providing
    solely for the specification of or a change in the maturity dates, the

                                       9
<PAGE>
 
    interest rates, the issuance prices or other similar terms of any Notes sold
    pursuant hereto or (iii) setting forth or incorporating by reference
    financial statements or other information as of and for a fiscal quarter or
    fiscal year, unless, in the case of clause (iii) above, in the reasonable
    judgment of any of you, such financial statements or other information are
    of such a nature that an opinion of counsel should be furnished), the
    Company shall furnish or cause to be furnished promptly to each of you a
    written opinion of Bradley, Arant, Rose & White (or other counsel reasonably
    satisfactory to the Agents), counsel of the Company satisfactory to each of
    you, dated the date of the effectiveness of such amendment or the date of
    the filing of such supplement, in form satisfactory to each of you, of the
    same tenor as the opinion referred to in Section 5(b) hereof but modified to
    relate to the Registration Statement and the Prospectus as amended and
    supplemented to the time of the effectiveness of such amendment or the
    filing of such supplement or, in lieu of such opinion, such counsel may
    furnish each of you with a letter to the effect that you may rely on such
    last opinion to the same extent as though it were dated the date of such
    letter authorizing reliance (except that statements in such last opinion
    will be deemed to relate to the Registration Statement and the Prospectus as
    amended and supplemented to the time of the effectiveness of such amendment
    or the filing of such supplement).

        (l) Each time that the Registration Statement or the Prospectus is
    amended or supplemented to include or incorporate amended or supplemental
    financial information, the Company shall cause its independent public
    accountants promptly to furnish each of you a letter, dated the date of the
    effectiveness of such amendment or the date of the filing of such
    supplement, in form satisfactory to each of you, of the same tenor as the
    letter referred to in Section 5(e) hereof with such changes as may be
    necessary to reflect the amended and supplemental financial information
    included or incorporated by reference in the Registration Statement and the
    Prospectus, as amended or supplemented to the date of such letter; provided,
                                                                       --------
    however, that, if the Registration Statement or the Prospectus is amended or
    -------
    supplemented solely to include or incorporate by reference financial
    information as of and for a fiscal quarter, the Company's independent public
    accountants may limit the scope of such letter, which shall be satisfactory
    in form to each of you, to the unaudited financial statements, the related
    "Management's Discussion and Analysis of Financial Condition and Results of
    Operations" and any other information of an accounting, financial or
    statistical nature included in such amendment or supplement, unless, in the
    reasonable judgment of any of you, such letter should cover other
    information or changes in specified financial statement line items.

        (m) During the period, if any, specified (whether orally or in writing)
    in any Terms Agreement, the Company shall not, without the prior consent of
    the Purchaser thereunder, offer, sell or contract to sell, or otherwise
    dispose of, directly or indirectly, or announce the offering of, any debt
    securities issued or guaranteed by the Company (other than the Notes being
    sold pursuant to such Terms Agreement).

        (n) The Company confirms as of the date hereof, and each acceptance by
    the Company of an offer to purchase Notes will be deemed an affirmation,
    that the Company is in compliance with all provisions of Section 1 of Laws

                                       10
<PAGE>
 
    of Florida, Chapter 92-198, An Act Relating to Disclosure of Doing Business
                                -----------------------------------------------
    with Cuba, and the Company further agrees that if it commences engaging in
    ---------
    business with the government of Cuba or with any person or affiliate located
    in Cuba after the date the Registration Statement becomes effective with the
    Commission or with the Florida Department of Banking and Finance (the
    "Department"), whichever date is later, or if the information reported in
    the Prospectus, if any, concerning the Company's business with Cuba or with
    any person or affiliate located in Cuba changes in any material way, the
    Company will provide the Department notice of such business or change, as
    appropriate, in a form acceptable to the Department.

        (o) The Company will not issue and sell Notes in excess of $__________
    unless, as of the Closing Date for each issuance beyond such $__________
    limit, the Company furnishes or causes to be furnished to each of you (a)
    resolutions of the shareholders of the Company certified by the Secretary of
    the Company approving the issuance by the Company of additional bonded
    indebtedness, which approval would cover the Notes to be issued on such
    Closing Date, (b) resolutions of the Board of Directors of the Company
    approving the issuance by the Company of the Notes to be issued on such
    Closing Date and (c) the written opinion of Bradley Arant Rose & White LLP
    (or such other counsel reasonably satisfactory to the Agents), counsel for
    the Company, satisfactory to each of you, with respect to such issuance, of
    the same tenor as the opinions referred to in Sections 5(b)(v) and (x).

        5. Conditions to the Obligations of the Agents. The obligations of each
           -------------------------------------------
Agent to solicit offers to purchase the Notes shall be subject to the accuracy
of the representations and warranties on the part of the Company contained
herein as of the Execution Time, on the Effective Date, when any supplement to
the Prospectus is filed with the Commission and as of each Closing Date, to the
accuracy of the statements of the Company made in any certificates pursuant to
the provisions hereof, to the performance by the Company of its obligations
hereunder and to the following additional conditions:

        (a) If filing of the Prospectus, or any supplement thereto, is required
    pursuant to Rule 424(b), the Prospectus, and any such supplement, shall have
    been filed in the manner and within the time period required by Rule 424(b);
    and no stop order suspending the effectiveness of the Registration Statement
    shall have been issued and no proceedings for that purpose shall have been
    instituted or threatened.

        (b) The Company shall have furnished to each Agent the opinion of
    Bradley, Arant, Rose & White (or such other counsel reasonably satisfactory
    to the Agents), counsel for the Company, dated the Execution Time, to the
    effect that:

                (i) the Company has been duly incorporated and is validly
        existing as a corporation in good standing under the laws of the State
        of Alabama, with full corporate power and authority to own its
        properties and conduct its business as described in the Prospectus, and
        is duly qualified to do business as a foreign corporation and is in good
        standing under the laws of each jurisdiction which requires such
        qualification wherein it owns or leases material properties or conducts

                                       11
<PAGE>
 
        material business and wherein the failure to be so qualified would have
        a material adverse effect on the business of the Company and the
        subsidiaries taken as a whole;

                (ii) each of the Subsidiaries has been duly organized and is
        validly existing as a corporation in good standing under the laws of the
        jurisdiction in which it is chartered or organized, with full corporate
        power and authority to own its properties and conduct its business as
        described in the Prospectus, and Alabama Gas Corporation is duly
        qualified to do business as a foreign corporation and is in good
        standing under the laws of each jurisdiction which requires such
        qualification wherein it owns or leases material properties or conducts
        material business, except where the failure to so qualify does not have
        a material adverse effect on the business of the Company and its
        subsidiaries as a whole;

                (iii) all the outstanding shares of capital stock of each
        Subsidiary have been duly and validly authorized and issued and are
        fully paid and nonassessable, and, except as otherwise set forth in the
        Prospectus, all outstanding shares of capital stock of the Subsidiaries
        are owned by the Company either directly or through wholly owned
        subsidiaries free and clear of any perfected security interest and, to
        the knowledge of such counsel, any other security interests, claims,
        liens or encumbrances (with the exception of those encumbrances in the
        Indenture);

                (iv) the Company's authorized equity capitalization is as set
        forth in the Prospectus; and the Notes conform to the description
        thereof contained in the Prospectus (subject to the insertion in the
        Notes of the maturity dates, the interest rates and other similar terms
        thereof which will be described in supplements to the Prospectus as
        contemplated by the fourth sentence of Section 1(a) of this Agreement);

                (v) the Indenture has been duly authorized, executed and
        delivered, has been duly qualified under the Trust Indenture Act, and
        constitutes a legal, valid and binding instrument enforceable against
        the Company in accordance with its terms (subject, as to enforcement of
        remedies, to applicable bankruptcy, reorganization, fraudulent
        conveyance, insolvency, moratorium or other laws affecting creditors'
        rights generally from time to time in effect, and by the availability of
        specific performance or of other equitable relief which is subject to
        the discretion of the court before which any proceeding may be brought);
        and up to an aggregate principal amount of $__________ of the Notes have
        been duly authorized and, when executed and authenticated in accordance
        with the provisions of the Indenture and delivered to and paid for by
        the purchasers thereof, will constitute legal, valid and binding
        obligations of the Company entitled to the benefits of the Indenture
        (other than the indemnity provisions contained in Section 8 hereof or
        Section 701 of the Indenture as to which such counsel need express no
        opinion);

                                       12
<PAGE>
 
                (vi) to the knowledge of such counsel, there is no pending or
        threatened action, suit or proceeding before any court or governmental
        agency, authority or body or any arbitrator involving the Company or any
        of its subsidiaries, of a character required to be disclosed in the
        Registration Statement which is not adequately disclosed in the
        Prospectus, and there is no franchise, contract or other document of a
        character required to be described in the Registration Statement or
        Prospectus, or to be filed as an exhibit, which is not described or
        filed as required; and the statements included or incorporated by
        reference in the Prospectus describing material contracts or agreements
        relating to the Company fairly summarize such matters;

                (vii) the Registration Statement has become effective under the
        Act; any required filing of the Prospectus, and any supplements thereto,
        pursuant to Rule 424(b) has been or will be made in the manner and
        within the time period required by Rule 424(b); to the 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 threatened; and the Registration Statement and the
        Prospectus (other than the financial statements and other financial and
        statistical information contained therein as to which such counsel need
        express no opinion) comply as to form in all material respects with the
        applicable requirements of the Act, the Exchange Act and the Trust
        Indenture Act and the respective rules thereunder; and such counsel has
        no reason to believe that the Registration Statement at the Effective
        Date or at the Execution Time contained any untrue statement of a
        material fact or omitted to state any material fact required to be
        stated therein or necessary to make the statements therein not
        misleading or that the Prospectus includes any untrue statement of a
        material fact or omits to state a material fact necessary to make the
        statements therein, in the light of the circumstances under which they
        were made, not misleading;

                (viii) this Agreement has been duly authorized, executed and
        delivered by the Company;

                (ix) no consent, approval, authorization or order of any court
        or governmental agency or body is required for the consummation of the
        transactions contemplated herein except such as have been obtained under
        the Act and such as may be required under the blue sky laws of any
        jurisdiction in connection with the sale of the Notes as contemplated by
        this Agreement and such other approvals (specified in such opinion) as
        have been obtained;

                (x) neither the execution and delivery of the Indenture, the
        issue and sale up to an aggregate principal amount of $__________ of the
        Notes, nor the consummation of any other of the transactions herein
        contemplated nor the fulfillment of the terms hereof will conflict with,
        result in a breach or violation of, or constitute a default under any
        law or the charter or by-laws of the Company or the terms of any
        indenture or other agreement or instrument known to such counsel and to

                                       13
<PAGE>
 
        which the Company or any of its Subsidiaries is a party or bound or any
        judgment, order, regulation or decree known to such counsel to be
        applicable to the Company or any of its Subsidiaries of any court,
        regulatory body, administrative agency, governmental body or arbitrator
        having jurisdiction over the Company or any of its Subsidiaries;

                (xi) to the knowledge of such counsel no holders of securities
        of the Company have rights to the registration of such securities under
        the Registration Statement;

                (xii) the information contained in the Prospectus under the
        caption "Certain Tax Considerations" is a fair and accurate summary of
        the principal Federal income tax consequences associated with the
        ownership of the Notes; and

                (xiii) the Company is exempt from all provisions of the 1935 Act
        except Section 9(a)(2) thereof.

In rendering such opinion, such counsel may rely (A) as to matters involving the
application of laws of any jurisdiction other than the State of Alabama or the
United States, to the extent deemed proper and specified in such opinion, upon
the opinion of other counsel of good standing believed to be reliable and who
are satisfactory to counsel for the Agent and (B) as to matters of fact, to the
extent deemed proper, on certificates of responsible officers of the Company and
public officials.  References to the Prospectus in this paragraph (b) include
any supplements thereto at the date such opinion is rendered.

        (c) Each Agent shall have received from Winthrop, Stimson, Putnam &
Roberts (or such other counsel reasonably satisfactory to the Company and the
Agents), counsel for the Agents, such opinion or opinions, dated the Execution
Time, with respect to the issuance and sale of the Notes, the Indenture, the
Registration Statement, the Prospectus (together with any supplement thereto)
and other related matters as the Agents may reasonably require, and the Company
shall have furnished to such counsel such documents as they request for the
purpose of enabling them to pass upon such matters.

        (d)  The Company shall have furnished to each Agent a certificate of the
Company, signed by the Chairman of the Board or the president and the principal
financial or accounting officer of the Company, dated the Execution Time, to the
effect that the signers of such certificate have reviewed the Registration
Statement, the Prospectus, any supplement to the Prospectus and this Agreement
and that:

                (i) the representations and warranties of the Company in this
        Agreement are true and correct in all material respects on and as of the
        date hereof with the same effect as if made on the date hereof and the
        Company has complied with all the agreements and satisfied all the
        conditions on its part to be performed or satisfied as a condition to
        the obligation of the Agents to solicit offers to purchase the Notes;

                                       14
<PAGE>
 
                (ii) no stop order suspending the effectiveness of the
        Registration Statement has been issued and no proceedings for that
        purpose have been instituted or, to the Company's knowledge, threatened;
        and

                (iii) since the date of the most recent financial statements
        included in the Prospectus (exclusive of any supplement thereto), there
        has been no material adverse change in the condition (financial or
        other), earnings, business or properties of the Company and its
        subsidiaries, whether or not arising from transactions in the ordinary
        course of business, except as set forth in or contemplated in the
        Prospectus (exclusive of any supplement thereto).

        (e) At the Execution Time, Coopers & Lybrand (or such other accountants
reasonably satisfactory to the Company and the Agents) shall have furnished to
each Agent a letter or letters (which may refer to letters previously delivered
to the Agents), dated as of the Execution Time, in form and substance
satisfactory to the Agents, confirming that they are independent accountants
within the meaning of the Act and the Exchange Act and the respective applicable
published rules and regulations thereunder and stating in effect that:

                (i) in their opinion the audited financial statements, financial
        statement schedules and pro forma financial statements, if any, included
        or incorporated by reference in the Registration Statement and the
        Prospectus and reported on by them comply as to form in all material
        respects with the applicable accounting requirements of the Act and the
        Exchange Act and the related published rules and regulations;

                (ii) on the basis of a reading of the latest unaudited financial
        statements made available by the Company and its subsidiaries; the
        performance of the procedures specified by the American Institute of
        Certified Public Accountants for a review of interim financial
        information as described in SAS No. 71, Interim Financial Information,
                                                -----------------------------
        on the latest unaudited financial statements, if any, included or
        incorporated by reference in the Prospectus; a reading of the minutes of
        the meetings of the stockholders, directors, audit and finance
        committees of the Company and its subsidiaries; and inquiries of certain
        officials of the Company who have responsibility for financial and
        accounting matters of the Company and its subsidiaries as to
        transactions and events subsequent to the date of the most recent
        audited financial statements included or incorporated in the Prospectus
        (it being understood that the foregoing procedures do not constitute an
        examination made in accordance with generally accepted auditing
        standards and they would not necessarily reveal matters of significance
        with respect to the comments made in such letter), nothing came to their
        attention which caused them to believe that:

                        (1) any unaudited financial statements included or
        incorporated by reference in the Registration Statement and the
        Prospectus do not comply as to form in all material respects with the
        applicable accounting requirements of the Exchange Act and the related
        published rules and regulations thereunder; and that any material

                                       15
<PAGE>
 
        modifications should be made to said unaudited financial statements for
        them to be in conformity with generally accepted accounting principles;

                        (2) with respect to the period subsequent to the date of
        the most recent financial statements (other than any capsule
        information), audited or unaudited, included or incorporated in the
        Registration Statement and the Prospectus, there were any changes, at a
        specified date not more than five business days prior to the date of the
        letter, in the common stock, preferred stock, current liabilities or
        long-term debt of the Company and its subsidiaries or decreases in the
        total common stockholders' equity of the Company as compared with the
        amounts shown on the most recent balance sheet included or incorporated
        in the Registration Statement and the Prospectus, or for the period from
        the most recent fiscal year of the Company to the date of the most
        recent available financial statements (audited or unaudited) of the
        Company there were any decreases, as compared with the corresponding
        period in the preceding year in operating revenues, operating income,
        other income or net income of the Company and its subsidiaries except in
        all instances for changes or decreases set forth in such letter, in
        which case the letter shall be accompanied by an explanation by the
        Company as to the significance thereof unless said explanation is not
        deemed necessary by the Agents; or

                        (3) the amounts included in any unaudited "capsule"
        information included or incorporated in the Registration Statement and
        the Prospectus do not agree with the amounts set forth in the unaudited
        financial statements for the same periods or were not determined on a
        basis substantially consistent with that of the corresponding amounts in
        the audited financial statements included or incorporated in the
        Registration Statement and the Prospectus;

                (iii) they have performed certain other specified procedures as
    a result of which they determined that certain information of an accounting,
    financial or statistical nature (which is limited to accounting, financial
    or statistical information derived from the general accounting records of
    the Company and its subsidiaries) set forth in the Registration Statement
    and the Prospectus and in Exhibit 12 to the Registration Statement,
    including the information included or incorporated in Items 1, 2, 6, 7 and
    11 of the Company's Annual Report on Form 10-K, incorporated in the
    Registration Statement and the Prospectus, and the information included in
    the "Management's Discussion and Analysis of Financial Condition and Results
    of Operations" included or incorporated in the Company's Quarterly Reports
    on Form 10-Q, incorporated in the Registration Statement and the Prospectus,
    agrees with the accounting records of the Company and its subsidiaries,
    excluding any questions of legal interpretation;

        (iv) if unaudited pro forma financial statements are included or
    incorporated in the Registration Statement and the Prospectus, on the basis
    of a reading of the unaudited pro forma financial statements, carrying out
    certain specified procedures, inquiries of certain officials of the Company
    and the acquired company who have responsibility for financial and

                                       16
<PAGE>
 
    accounting matters, and proving the arithmetic accuracy of the application
    of the pro forma adjustments to the historical amounts in the pro forma
    financial statements, nothing came to their attention which caused them to
    believe that the pro forma financial statements do not comply in form in all
    material respects with the applicable accounting requirements of Rule 11-02
    of Regulation S-X or that the pro forma adjustments have not been properly
    applied to the historical amounts in the compilation of such statements; and

        References to the Prospectus in this paragraph (e) include any
    supplement thereto at the date of the letter.

        (f) Prior to the Execution Time, the Company shall have furnished to
    each Agent such further information, documents, certificates and opinions of
    counsel as the Agents may reasonably request.

        If any of the conditions specified in this Section 5 shall not have been
fulfilled in all material respects when and as provided in this Agreement, or if
any of the opinions and certificates mentioned above or elsewhere in this
Agreement shall not be in all material respects reasonably satisfactory in form
and substance to such Agents and counsel for the Agents, this Agreement and all
obligations of any Agent hereunder may be canceled at any time by the Agents.
Notice of such cancellation shall be given to the Company in writing or by
telephone or telegraph confirmed in writing.

        The documents required to be delivered by this Section 5 shall be
delivered at the office of Winthrop, Stimson, Putnam & Roberts, counsel for the
Agents, at One Battery Park Plaza, New York, New York 10004-1490, on the date
hereof.

        6.  Conditions to the Obligations of a Purchaser.  The obligations of a
            --------------------------------------------
Purchaser to purchase any Notes will be subject to the accuracy of the
representations and warranties on the part of the Company herein as of the date
of the related Terms Agreement and as of the Closing Date for such Notes, to the
performance and observance by the Company of all covenants and agreements herein
contained on its part to be performed and observed and to the following
additional conditions precedent:

        (a) If filing of the Prospectus or any supplement thereto is required
    pursuant to Rule 424(b), the Prospectus and any such supplement shall have
    been filed in the manner and within the time period required by Rule 424(b);
    and no stop order suspending the effectiveness of the Registration Statement

                                       17
<PAGE>
 
    shall have been issued and no proceedings for that purpose shall have been
    instituted or threatened; and shareholder approval sufficient to authorize
    the issuance and sale of the Notes to be sold to the Purchaser shall be
    obtained by the Company.

        (b) To the extent agreed to between the Company and the Purchaser in a
    Terms Agreement, the Purchaser shall have received, appropriately updated,
    (i) a certificate of the Company, dated as of the Closing Date, to the
    effect set forth in Section 5(d) (except that references to the Prospectus
    shall be to the Prospectus as supplemented as of the date of such Terms
    Agreement), (ii) the opinion of Bradley, Arant, Rose & White (or other
    counsel reasonably satisfactory to the Agents), counsel for the Company,
    dated as of the Closing Date, to the effect set forth in Section 5(b), (iii)
    the opinion of Winthrop, Stimson, Putnam & Roberts (or other counsel
    reasonably satisfactory to the Company), counsel for the Purchaser, dated as
    of the Closing Date, to the effect set forth in Section 5(c), and (iv)
    letter of Coopers & Lybrand (or other independent accountants reasonably
    satisfactory to the Agents), independent accountants for the Company, dated
    as of the Closing Date, to the effect set forth in Section 5(e).

        (c) Prior to the Closing Date, the Company shall have furnished to the
    Purchaser such further information, certificates and documents as the
    Purchaser may reasonably request.

        If any of the conditions specified in this Section 6 shall not have been
fulfilled in all material respects when and as provided in this Agreement and
the applicable Terms Agreement, or if any of the opinions and certificates
mentioned above or elsewhere in this Agreement or such Terms Agreement and
required to be delivered to the Purchaser pursuant to the terms hereof and
thereof shall not be in all material respects reasonably satisfactory in form
and substance to the Purchaser and its counsel, such Terms Agreement and all
obligations of the Purchaser thereunder and with respect to the Notes subject
thereto may be canceled at, or at any time prior to, the respective Closing Date
by the Purchaser.  Notice of such cancellation shall be given to the Company in
writing or by telephone or telegraph confirmed in writing.

        7. Right of Person Who Agreed to Purchase to Refuse to Purchase. (a) The
           ------------------------------------------------------------
Company agrees that any person who has agreed to purchase and pay for any Note
pursuant to a solicitation by any of the Agents shall have the right to refuse
to purchase such Note if, at the Closing Date therefor, any condition set forth
in Section 5 or 6, as applicable, shall not be satisfied.

        (b) The Company agrees that any person who has agreed to purchase and
pay for any Note pursuant to a solicitation by any of the Agents shall have the
right to refuse to purchase such Note if, subsequent to the agreement to
purchase such Note, any change, condition or development specified in any of
Sections 9(b)(i) through (v) shall have occurred (with the judgment of the Agent
which presented the offer to purchase such Note being substituted for any
judgment of a Purchaser required therein) the effect of which is, in the
judgment of the Agent which presented the offer to purchase such Note, so
material and adverse as to make it impractical or inadvisable to proceed with
the sale and delivery of such Note (it being understood that under no

                                       18
<PAGE>
 
circumstance shall any such Agent have any duty or obligation to the Company or
to any such person to exercise the judgment permitted to be exercised under this
Section 7(b) and Section 9(b)).

        8. Indemnification and Contribution. (a) The Company agrees to indemnify
           --------------------------------
and hold harmless each of you, the directors, officers, employees and agents of
each of you and each person who controls each of you within the meaning of
either the Act or the Exchange Act against any and all losses, claims, damages
or liabilities, joint or several, to which you, they or any of you or them may
become subject under the Act, the Exchange Act or other Federal or state
statutory law or regulation, at common law or otherwise, insofar as such losses,
claims, damages or liabilities (or actions in respect thereof) arise out of or
are based upon any untrue statement or alleged untrue statement of a material
fact contained in the registration statement for the registration of the
Securities as originally filed or in any amendment thereof, or in the Prospectus
or any preliminary Prospectus, or in any amendment thereof or supplement
thereto, or arise out of or are based upon the omission or alleged omission to
state therein a material fact required to be stated therein or necessary to make
the statements therein not misleading, and agrees to reimburse each such
indemnified party, as incurred, for any legal or other expenses reasonably
incurred by them in connection with investigating or defending any such loss,
claim, damage, liability or action; provided, however, that the Company will not
                                    --------  -------
be liable in any such case to the extent that any such loss, claim, damage or
liability arises out of or is based upon any such untrue statement or alleged
untrue statement or omission or alleged omission made therein in reliance upon
and in conformity with written information furnished to the Company by any of
you specifically for inclusion therein. This indemnity agreement will be in
addition to any liability which the Company may otherwise have.

        (b) Each of you agrees to indemnify and hold harmless the Company, each
of its directors, each of its officers who signs the Registration Statement and
each person who controls the Company within the meaning of either the Act or the
Exchange Act, to the same extent as the foregoing indemnity from the Company to
you, but only with reference to written information relating to such of you
furnished to the Company by such of you specifically for inclusion in the
documents referred to in the foregoing indemnity. This indemnity agreement will
be in addition to any liability which you may otherwise have. The Company
acknowledges that the statements set forth in the last paragraph of the cover
page, and under the heading "Plan of Distribution", of the Prospectus Supplement
constitute the only information furnished in writing by any of you for inclusion
in the documents referred to in the foregoing indemnity, and you confirm that
such statements are correct.

        (c) Promptly after receipt by an indemnified party under this Section 8
of notice of the commencement of any action, such indemnified party will, if a
claim in respect thereof is to be made against the indemnifying party under this
Section 8, notify the indemnifying party in writing of the commencement thereof;
but the failure so to notify the indemnifying party (i) will not relieve it from
liability under paragraph (a) or (b) above unless and to the extent it did not
otherwise learn of such action and such failure results in the forfeiture by the
indemnifying party of substantial rights and defenses and (ii) will not, in any
event, relieve the indemnifying party from any obligations to any indemnified
party other than the indemnification obligation provided in paragraph (a) or (b)

                                       19
<PAGE>
 
above. The indemnifying party shall be entitled to appoint counsel of the
indemnifying party's choice at the indemnifying party's expense to represent the
indemnified party in any action for which indemnification is sought (in which
case the indemnifying party shall not thereafter be responsible for the fees and
expenses of any separate counsel retained by the indemnified party or parties
except as set forth below); provided, however, that such counsel shall be
                            --------  -------
satisfactory to the indemnified party. Notwithstanding the indemnifying party's
election to appoint counsel to represent the indemnified party in an action, the
indemnified party shall have the right to employ separate counsel (including
local counsel), and the indemnifying party shall bear the reasonable fees, costs
and expenses of one such separate counsel for all indemnified parties if (i) the
use of counsel chosen by the indemnifying party to represent the indemnified
party would present such counsel with a conflict of interest, (ii) the actual or
potential defendants in, or targets of, any such action include both the
indemnified party and the indemnifying party and the indemnified party shall
have reasonably concluded that there may be legal defenses available to it
and/or other indemnified parties which are different from or additional to those
available to the indemnifying party, (iii) the indemnifying party shall not have
employed counsel satisfactory to the indemnified party to represent the
indemnified party within a reasonable time after notice of the institution of
such action or (iv) the indemnifying party shall authorize the indemnified party
to employ separate counsel at the expense of the indemnifying party.

        (d) In the event that the indemnity provided in paragraph (a) or (b) of
this Section 8 is unavailable to or insufficient to hold harmless an indemnified
party for any reason, the Company and each of you agree to contribute to the
aggregate losses, claims, damages and liabilities (including legal or other
expenses reasonably incurred in connection with investigating or defending same)
(collectively "Losses") to which the Company and one or more of you may be
subject in such proportion as is appropriate to reflect the relative benefits
received by the Company and by each of you from the offering of the Notes from
which such Losses arise; provided, however, that in no case shall any of you be
                         --------  -------
responsible for any amount in excess of the commissions received by such of you
in connection with the sale of Notes from which such Losses arise (or, in the
case of Notes sold pursuant to a Terms Agreement, the aggregate commissions that
would have been received by such of you if such commissions had been payable).
If the allocation provided by the immediately preceding sentence is unavailable
for any reason, the Company and each of you shall contribute in such proportion
as is appropriate to reflect not only such relative benefits but also the
relative fault of the Company and of each of you in connection with the
statements or omissions which resulted in such Losses as well as any other
relevant equitable considerations. Benefits received by the Company shall be
deemed to be equal to the total net proceeds from the offering (before deducting
expenses) of the Notes from which such Losses arise, and benefits received by
each of you shall be deemed to be equal to the total commissions received by
such of you in connection with the sale of Notes from which such Losses arise
(or, in the case of Notes sold pursuant to a Terms Agreement, the aggregate
commissions that would have been received by such of you if such commissions had
been payable). Relative fault shall be determined by reference to whether any
alleged untrue statement or omission relates to information provided by the
Company or any of you. The Company and each of you agree that it would not be
just and equitable if contribution were determined by pro rata allocation or any
other method of allocation which does not take account of the equitable
considerations referred to above. Notwithstanding the provisions of this
paragraph (d), no person guilty of fraudulent misrepresentation (within the

                                       20
<PAGE>
 
meaning of Section 11(f) of the Act) shall be entitled to contribution from any
person who was not guilty of such fraudulent misrepresentation. For purposes of
this Section 8, each person who controls any of you within the meaning of the
Act or the Exchange Act and each director, officer, employee and agent of any of
you shall have the same rights to contribution as you and each person who
controls the Company within the meaning of either the Act or the Exchange Act,
each officer of the Company who shall have signed the Registration Statement and
each director of the Company shall have the same rights to contribution as the
Company, subject in each case to the applicable terms and conditions of this
paragraph (d).

        9. Termination. (a) This Agreement will continue in effect until
           -----------
terminated as provided in this Section 9. This Agreement may be terminated
either by the Company as to any Agent or by any of you insofar as this Agreement
relates to any Agent, by giving written notice of such termination to such Agent
or the Company, as the case may be. This Agreement shall so terminate at the
close of business on the first business day following the receipt of such notice
by the party to whom such notice is given. In the event of such termination, no
party shall have any liability to the other party hereto, except as provided in
the fourth paragraph of Section 2(a), Section 4(h), Section 8 and Section 10.

        (b) Each Terms Agreement shall be subject to termination in the absolute
discretion of the Purchaser, by notice given to the Company prior to delivery of
any payment for any Note to be purchased thereunder, if prior to such time (i)
there shall have occurred, subsequent to the agreement to purchase such Note,
any change, or any development involving a prospective change, in or affecting
the business or properties of the Company and its subsidiaries the effect of
which is, in the judgment of the Purchaser, so material and adverse as to make
it impractical or inadvisable to proceed with the offering or delivery of such
Note, (ii) there shall have been, subsequent to the agreement to purchase such
Note, any decrease in the rating of any of the Company's debt securities by any
"nationally recognized statistical rating organization" (as defined for purposes
of Rule 436(g) under the Act) or any notice given of any intended or potential
decrease in any such rating or of a possible change in any such rating that does
not indicate the direction of the possible change, (iii) trading in any
securities of the Company shall have been suspended by the Commission or a
national securities exchange, or minimum or maximum prices for trading in
securities generally shall have been fixed, or maximum ranges for prices for
securities shall have been required, by either of said exchanges or by order of
the Commission or any other governmental authority (iv) a banking moratorium
shall have been declared by either Federal or New York State authorities or (v)
there shall have occurred any outbreak or escalation of hostilities, declaration
by the United States of a national emergency or war or other calamity or crisis
the effect of which on financial markets is such as to make it, in the judgment
of the Purchaser, impracticable or inadvisable to proceed with the offering or
delivery of such Notes as contemplated by the Prospectus (exclusive of any
supplement thereto which is created after the time of execution of such Terms
Agreement).

        10. Survival of Certain Provisions. The respective agreements,
            ------------------------------
representations, warranties, indemnities and other statements of the Company or
its officers and of you set forth in or made pursuant to this Agreement will
remain in full force and effect, regardless of any investigation made by or on
behalf of you or the Company or any of the directors, officers, employees,
agents or controlling persons referred to in Section 8 hereof, and will survive

                                       21
<PAGE>
 
delivery of and payment for the Notes. The provisions of Sections 4(h) and 8
hereof shall survive the termination or cancellation of this Agreement. The
provisions of this Agreement (including without limitation Section 7 hereof)
applicable to any purchase of a Note for which an agreement to purchase exists
prior to the termination hereof shall survive any termination of this Agreement.
If at the time of termination of this Agreement any Purchaser shall own any
Notes with the intention of selling them, the provisions of Section 4 shall
remain in effect until such Notes are sold by the Purchaser.

        11. Notices. All communications hereunder will be in writing and
            -------
effective only on receipt, and, if sent to any of you, will be mailed, delivered
or telegraphed and confirmed to such of you, at the address specified in
Schedule I hereto; or, if sent to the Company, will be mailed, delivered or
telegraphed and confirmed to it at the office of Energen Corporation, 2101 Sixth
Avenue North, Birmingham, Alabama 35203, Attention: Treasurer.

        12. Successors. This Agreement will inure to the benefit of and be
            ----------
binding upon the parties hereto, their respective successors, the directors,
officers, employees, agents and controlling persons referred to in Section 8
hereof and, to the extent provided in Section 7, any person who has agreed to
purchase Notes, and no other person will have any right or obligation hereunder.

        13. Applicable Law. This Agreement will be governed by and construed in
            --------------
accordance with the laws of the State of New York.

        14.  Counterparts.  This Agreement may be simultaneously executed in
             ------------
counterparts, each of which when so executed shall be deemed to be an original.
Such counterparts shall together constitute one and the same instrument.

                                       22
<PAGE>
 
        If the foregoing is in accordance with your understanding of our
agreement, please sign and return to us the enclosed duplicate hereof, whereupon
this letter and your acceptance shall represent a binding agreement among the
Company and you.

                                        Very truly yours,

                                        Energen Corporation

                                        By:_____________________________

                                        By:_____________________________

The foregoing Agreement is
hereby confirmed and accepted
as of the date hereof.

[Agent's Name]


By: _________________________
     Name:
     Title:

                                       23
<PAGE>
 
                                  SCHEDULE I

Commissions:

        The Company agrees to pay each Agent a commission equal to the following
percentage of the principal amount of each Note sold on an agency basis by such
Agent:

            Maturity                  Commission Rate

9 months to less than 12 months                  .125%
12 months to less than 18 months                 .150%
18 months to less than 2 years                   .200%
2 years to less than 3 years                     .250%
3 years to less than 4 years                     .350%
4 years to less than 5 years                     .450%
5 years to less than 6 years                     .500%
6 years to less than 7 years                     .550%
7 years to less than 8 years                     .600%
8 years to less than 9 years                     .600%
9 years to less than 10 years                    .600%
10 years to less than 15 years                   .625%
15 years to less than 20 years                   .700%
20 years to less than 30 years                   .750%
30 years and beyond                                 *


        Unless otherwise specified in the applicable Terms Agreement, the
discount or commission payable to a Purchaser shall be determined on the basis
of the commission schedule set forth above.


Address for Notice to you:
- -------------------------

        Notices to [Agent's Name] shall be directed to it at [address].

________________________

*  To be negotiated between the applicable Agent and the Company.
<PAGE>
 
                                                                       EXHIBIT A



                              ENERGEN CORPORATION

                  Medium-Term Note Administrative Procedures
                  ------------------------------------------

                              _____________, 1998


        The Medium-Term Notes, Due Nine Months or More from Date of Issue (the
"Notes") of Energen Corporation (the "Company") are to be offered on a
continuing basis. [Agent's Name(s)], as agents (each an "Agent"), have agreed to
solicit purchases of Notes issued in fully registered form.  The Agents will not
be obligated to purchase Notes for their own account.  The Notes are being sold
pursuant to a Selling Agency Agreement between the Company and the agents named
therein (including the Agents) dated the date hereof (the "Agency Agreement").
The Notes will rank equally with all other unsecured and unsubordinated debt of
the Company and have been registered with the Securities and Exchange Commission
(the "Commission").  The Notes will be issued under an Indenture dated as of
__________, 1998 (the "Indenture"), between the Company and The Bank of New
York, as trustee (the "Trustee").  The Trustee will act as the paying agent (the
"Paying Agent") for the payment of principal of and premium, if any, and
interest on the Notes and will perform, as the Paying Agent, unless otherwise
specified, the other duties specified herein.

        The Agency Agreement provides that Notes may also be purchased by an
Agent acting solely as principal and not as agent. In the event of any such
purchase, the functions of both the Agent and the beneficial owner under the
administrative procedures set forth below shall be performed by such Agent
acting solely as principal, unless otherwise agreed to between the Company and
such Agent acting as principal.

        Each Note will be represented by either a Global Security (as defined
hereinafter) delivered to Cede & Co. ("Cede"), as agent for The Depository Trust
Company ("DTC"), and recorded in the book-entry system maintained by DTC (a
"Book-Entry Note") or a certificate delivered to the Holder thereof or a Person
designated by such Holder (a "Certificated Note").  Only Notes denominated and
payable in U.S. dollars may be issued as Book-Entry Notes.  An owner of a Book-
Entry Note will not be entitled to receive a certificate representing such Note.

        The procedures to be followed during, and the specific terms of, the
solicitation of orders by the Agents and the sale as a result thereof by the
Company are explained below.  Administrative and record-keeping responsibilities
will be handled for the Company by its Treasurer.  The Company will advise the
Agents and the Trustee in writing of those persons handling administrative
<PAGE>
 
responsibilities with whom the Agents and the Trustee are to communicate
regarding orders to purchase Notes and the details of their delivery.

                Administrative procedures and specific terms of the offering are
explained below. Book-Entry Notes will be issued in accordance with the
administrative procedures set forth in Part I hereof, as adjusted in accordance
with changes in DTC's operating requirements, and Certificated Notes will be
issued in accordance with the administrative procedures set forth in Part II
hereof. Unless otherwise defined herein, terms defined in the Indenture and the
Notes shall be used herein as therein defined. Notes for which interest is
calculated on the basis of a fixed interest rate, which may be zero, are
referred to herein as "Fixed Rate Notes". Notes for which interest is calculated
on the basis of a floating interest rate are referred to herein as "Floating
Rate Notes". To the extent the procedures set forth below conflict with the
provisions of the Notes, the Indenture, DTC's operating requirements or the
Agency Agreement, the relevant provisions of the Notes, the Indenture, DTC's
operating requirements and the Agency Agreement shall control.


                                    PART I

                         Administrative Procedures for
                         -----------------------------
                               Book-Entry Notes
                               ----------------

                In connection with the qualification of the Book-Entry Notes for
eligibility in the book-entry system maintained by DTC, Trustee will perform the
custodial, document control and administrative functions described below, in
accordance with its respective obligations under a Letter of Representations
from the Company and Trustee to DTC dated as of the date hereof and a Medium-
Term Note Certificate Agreement between Trustee and DTC, dated as of __________,
19__, and its obligations as a participant in DTC, including DTC's Same-Day
Funds Settlement system ("SDFS").

Issuance:               On any date of settlement (as defined under "Settlement"
- --------                below) for one or more Book-Entry Notes, the Company
                        will issue a single global security in fully registered
                        form without coupons (a "Global Security") representing
                        up to $___________ principal amount of all such Book-
                        Entry Notes that have the same original issue date,
                        original issue discount provisions, if any, Interest
                        Payment Dates, Regular Record Dates, Interest Payment
                        Period, redemption, repayment and extension provisions,
                        if any, Maturity Date, and, in the case of Fixed Rate
                        Notes, interest rate, or, in the case of Floating Rate
                        Notes, initial interest rate, Base Rate, Index Maturity,
                        Interest Reset Period, Interest Reset Dates, Spread or
                        Spread Multiplier, if any, minimum interest rate, if
                        any, and maximum interest rate, if any (collectively,
                        the "Terms"). Each Global Security will be dated and
                        issued as of the date of its authentication by the
                        Trustee. Each Global Security will bear an original
                        issue date, which will be (i) with respect to an

                                       2
<PAGE>
 
                        original Global Security (or any portion thereof), the
                        original issue date specified in such Global Security
                        and (ii) following a consolidation of Global Securities,
                        with respect to the Global Security resulting from such
                        consolidation, the most recent Interest Payment Date to
                        which interest has been paid or duly provided for on the
                        predecessor Global Securities, regardless of the date of
                        authentication of such resulting Global Security. No
                        Global Security will represent any Certificated Note.

Identification
- --------------
Numbers                 The Company has arranged with the CUSIP Service Bureau
- -------                 of Standard & Poor's Corporation (the "CUSIP Service
                        Bureau") for the reservation of a series of CUSIP
                        numbers, which series consists of approximately ___
                        CUSIP numbers and relates to Global Securities
                        representing Book-Entry Notes and book-entry medium-term
                        notes issued by the Company with other series
                        designations. The Company has obtained from the CUSIP
                        Service Bureau a written list of such reserved CUSIP
                        numbers and has delivered such list to the Trustee and
                        DTC. The Company will assign CUSIP numbers to Global
                        Securities as described below under Settlement Procedure
                        "B". DTC will notify the CUSIP Service Bureau
                        periodically of the CUSIP numbers that the Company has
                        assigned to Global Securities. At any time when fewer
                        than 100 of the reserved CUSIP numbers remain unassigned
                        to Global Securities, and, if it deems necessary , the
                        Company will reserve additional CUSIP numbers for
                        assignment to Global Securities. Upon obtaining such
                        additional CUSIP numbers, the Company shall deliver a
                        list of such additional CUSIP numbers to Trustee and
                        DTC.

Registration:           Global Securities will be issued only in fully
- ------------            registered form without coupons. Each Global Security
                        will be registered in the name of CEDE & CO., as nominee
                        for DTC, on the securities register for the Notes
                        maintained under the Indenture. The beneficial owner of
                        a Book-Entry Note (or one or more indirect participants
                        in DTC designated by such owner) will designate one or
                        more participants in DTC (with respect to such Book-
                        Entry Note, the "Participants") to act as agent or
                        agents for such owner in connection with the book-entry
                        system maintained by DTC, and DTC will record in book-
                        entry form, in accordance with instructions provided by
                        such Participants, a credit balance with respect to such
                        beneficial owner in such Book-Entry Note in the account
                        of such Participants. The ownership interest of such
                        beneficial owner (or such participant) in such Book-
                        Entry Note will be recorded through the records of such

                                       3
<PAGE>
 
                        Participants or through the separate records of such
                        Participants and one or more indirect participants in
                        DTC.

Transfers:              Transfers of a Book-Entry Note will be accomplished by
- ---------               book entries made by DTC and, in turn, by Participants
                        (and in certain cases, one or more indirect participants
                        in DTC) acting on behalf of beneficial transferors and
                        transferees of such Note.

Exchanges:              Upon receipt of instructions from Company, Trustee may
- ---------               deliver to DTC and the CUSIP Service Bureau at any time
                        a written notice of consolidation (a copy of which shall
                        be attached to the resulting Global Security described
                        below) specifying (i) the CUSIP numbers of two or more
                        outstanding Global Securities that represent (A) Fixed
                        Rate Book-Entry Notes having the same Terms and for
                        which interest has been paid to the same date or (B)
                        Floating Rate Book-Entry Notes having the same Terms and
                        for which interest has been paid to the same date, (ii)
                        a date, occurring at least thirty days after such
                        written notice is delivered and at least thirty days
                        before the next Interest Payment Date for such Book-
                        Entry Notes, on which such Global Securities shall be
                        exchanged for a single replacement Global Security and
                        (iii) a new CUSIP number, obtained from the Company, to
                        be assigned to such replacement Global Security. Upon
                        receipt of such a notice, DTC will send to its
                        participants (including Trustee) a written
                        reorganization notice to the effect that such exchange
                        will occur on such date. Prior to the specified exchange
                        date, Trustee will deliver to the CUSIP Service Bureau a
                        written notice setting forth such exchange date and such
                        new CUSIP number and stating that, as of such exchange
                        date, the CUSIP numbers of the Global Securities to be
                        exchanged will no longer be valid. On the specified
                        exchange date, Trustee will exchange such Global
                        Securities for a single Global Security bearing the new
                        CUSIP number and the CUSIP numbers of the exchanged
                        Global Securities will, in accordance with CUSIP Service
                        Bureau procedures, be canceled and not reassigned until
                        the Book-Entry Notes represented by such exchanged
                        Global Securities have matured or been redeemed.
                        Notwithstanding the foregoing, if the Global Securities
                        to be exchanged exceed $200,000,000 in aggregate
                        principal amount, one Global Security will be
                        authenticated and issued to represent each $200,000,000
                        of principal amount of the exchanged Global Securities
                        and an additional Global Security will be authenticated
                        and issued to represent any remaining principal amount
                        of such Global Securities (see "Denominations" below).

                                       4
<PAGE>
 
Maturities:             Each Book-Entry Note will mature on a date nine months
- ----------              or more after the Original Issue Date for such Note. A
                        Floating Rate Book-Entry Note will mature only on an
                        Interest Payment Date for such Note.

Denominations:          Book-Entry Notes will be issued in principal amounts of
- -------------           $1,000 or any amount in excess thereof that is an
                        integral multiple of $1,000. Global Securities will be
                        denominated in principal amounts not in excess of
                        $200,000,000. If one or more Book-Entry Notes having an
                        aggregate principal amount in excess of $200,000,000
                        would, but for the preceding sentence, be represented by
                        a single Global Security, then one Global Security will
                        be authenticated and issued to represent each
                        $200,000,000 principal amount of such Book-Entry Note or
                        Notes and an additional Global Security will be
                        authenticated and issued to represent any remaining
                        principal amount of such Book-Entry Note or Notes. In
                        such a case, each of the Global Securities representing
                        such Book-Entry Note or Notes shall be assigned the same
                        CUSIP number.

Interest:               General. Interest, if any, on each Book-Entry Note will
- --------                -------
                        accrue from the original issue date for the first
                        interest period or the last date to which interest has
                        been paid, if any, for each subsequent interest period,
                        on the Global Security representing such Book-Entry
                        Note, and will be calculated and paid in the manner
                        described in such Book-Entry Note and in the Prospectus
                        (as defined in the Agency Agreement), as supplemented by
                        the applicable Pricing Supplement. Unless otherwise
                        specified therein, each payment of interest on a Book-
                        Entry Note will include interest accrued to but
                        excluding the Interest Payment Date (provided that, in
                        the case of Floating Rate Book-Entry Notes which reset
                        daily or weekly, interest payments will include accrued
                        interest to but excluding the Regular Record Date
                        immediately preceding the Interest Payment Date) or to
                        but excluding Maturity (other than a Maturity of a Fixed
                        Rate Book-Entry Note occurring on the 31st day of a
                        month, in which case such payment of interest will
                        include interest accrued to but excluding the 30th day
                        of such month). Interest payable at the Maturity of a
                        Book-Entry Note will be payable to the Person to whom
                        the principal of such Note is payable. Standard & Poor's
                        Corporation will use the information received in the
                        pending deposit message described under Settlement
                        Procedure "C" below in order to include the amount of
                        any interest payable and certain other information
                        regarding the related Global Security in the appropriate
                        (daily or weekly) bond report published by Standard &
                        Poor's Corporation.

                                       5
<PAGE>
 
                        Regular Record Dates. The Regular Record Date with
                        --------------------
                        respect to any Interest Payment Date shall be the date
                        fifteen calendar days immediately preceding such
                        Interest Payment Date (whether or not a Business Day).

                        Interest Payment Dates on Fixed Rate Book-Entry Notes.
                        -----------------------------------------------------
                        Unless otherwise specified pursuant to Settlement
                        Procedure "A" below, interest payments on Fixed Rate
                        Book-Entry Notes will be made semiannually on
                        ______________ and _____________ of each year and at
                        Maturity; provided, however, that if an Interest Payment
                        Date for a Fixed Rate Book-Entry Note is not a Business
                        Day, the payment due on such day shall be made on the
                        next succeeding Business Day and no interest shall
                        accrue on such payment for the period from and after
                        such Interest Payment Date; provided further, that in
                        the case of a Fixed Rate Book-Entry Note issued between
                        a Regular Record Date and an Interest Payment Date, the
                        first interest payment will be made on the Interest
                        Payment Date following the next succeeding Regular
                        Record Date.

                        Interest Payment Dates on Floating Rate Book-Entry
                        --------------------------------------------------
                        Notes. Interest payments will be made on Floating Rate
                        -----
                        Book-Entry Notes monthly, quarterly, semi-annually or
                        annually. Unless otherwise agreed upon, interest will be
                        payable, in the case of Floating Rate Book-Entry Notes
                        with a monthly Interest Payment Period, on the third
                        Wednesday of each month; with a quarterly Interest
                        Payment Period, on the third Wednesday of March, June,
                        September and December of each year; with a semi-annual
                        Interest Payment Period on the third Wednesday of the
                        two months specified pursuant to Settlement Procedure
                        "A" below; and with an annual Interest Payment Period,
                        on the third Wednesday of the month specified pursuant
                        to Settlement Procedure "A" below; provided, however,
                        that if an Interest Payment Date for a Floating Rate
                        Book-Entry Note would otherwise be a day that is not a
                        Business Day with respect to such Floating Rate Book-
                        Entry Note, such Interest Payment Date will be the next
                        succeeding Business Day with respect to such Floating
                        Rate Book-Entry Note, except in the case of a Floating
                        Rate Book-Entry Note for which the Base Rate is LIBOR,
                        if such Business Day is in the next succeeding calendar
                        month, such Interest Payment Date will be the
                        immediately preceding Business Day; and provided
                        further, that in the case of a Floating Rate Book-Entry
                        Note issued between a Regular Record Date and an
                        Interest Payment Date, the first interest payment will
                        be made on the Interest Payment Date following the next
                        succeeding Regular Record Date.

                                       6
<PAGE>
 
                        Notice of Interest Payment and Regular Record Dates. On
                        ---------------------------------------------------
                        the first Business Day of January, April, July and
                        October of each year, Trustee will deliver to the
                        Company and DTC a written list of Regular Record Dates
                        and Interest Payment Dates that will occur with respect
                        to Book-Entry Notes during the six-month period
                        beginning on such first Business Day. Promptly after
                        each Interest Determination Date for Floating Rate Book-
                        Entry Notes, Trustee as Calculation Agent, will notify
                        Standard & Poor's Corporation of the interest rates
                        determined on such Interest Determination Date.

Calculation of          Fixed Rate Book-Entry Notes. Interest on Fixed Rate Book
- --------------          Entry Notes (including interest for partial periods)
Interest:               will be calculated on the basis of a 360-day year of
- --------                twelve 30-day months.
                        

                        Floating Rate Book-Entry Notes. Interest rates on
                        ------------------------------
                        Floating Rate Book-Entry Notes will be determined as set
                        forth in the form of Notes. Interest on Floating Rate
                        Book-Entry Notes, except as otherwise set forth therein,
                        will be calculated on the basis of actual days elapsed
                        and a year of 360 days, except that in the case of a
                        Floating Rate Book-Entry Note for which the Base Rate is
                        Treasury Rate, interest will be calculated on the basis
                        of the actual number of days in the year.

Payments of             Payment of Interest Only.  Promptly after each Regular
- -----------             Record Date, Paying Agent will deliver to the Company
Principal and           and DTC a written notice setting forth, by CUSIP number,
- -------------           the amount of interest to be paid on each Global
Interest:               Security on the following Interest Payment Date (other
- --------                than an Interest Payment Date coinciding with Maturity)
                        and the total of such amounts. DTC will confirm the
                        amount payable on each Global Security on such Interest
                        Payment Date by reference to the appropriate (daily or
                        weekly) bond reports published by Standard & Poor's
                        Corporation. The Company will pay to Paying Agent, the
                        total amount of interest due on such Interest Payment
                        Date (other than at Maturity), and Paying Agent will pay
                        such amount to DTC, at the times and in the manner set
                        forth below under "Manner of Payment".

                        Payments at Maturity. On or about the first Business Day
                        --------------------
                        of each month, Paying Agent will deliver to the Company,
                        DTC and the Trustee a written list of principal and
                        interest to be paid on each Global Security maturing (on
                        a Maturity or Redemption Date or otherwise) in the
                        following month. Company and DTC will confirm the
                        amounts of such principal and interest payments with
                        respect to each such Global Security on or about the
                        fifth Business Day preceding the Maturity of such Global
                        Security. On or before Maturity, the Company will pay to

                                       7
<PAGE>
 
                        Paying Agent, the principal amount of such Global
                        Security, together with interest due at such Maturity.
                        Paying Agent will pay such amount to DTC at the times
                        and in the manner set forth below under "Manner of
                        Payment". If any Maturity of a Global Security
                        representing Book-Entry Notes is not a Business Day, the
                        payment due on such day shall be made on the next
                        succeeding Business Day and no interest shall accrue on
                        such payment for the period from and after such
                        Maturity. Promptly after payment to DTC of the principal
                        and interest due at Maturity of such Global Security,
                        the Trustee will cancel such Global Security in
                        accordance with the Indenture and so advise the Company.

                        Manner of Payment. The total amount of any principal and
                        -----------------
                        interest due on Global Securities on any Interest
                        Payment Date or at Maturity shall be paid by the Company
                        to Paying Agent in immediately available funds for use
                        by the Paying Agent on such date. The Company will make
                        such payment on such Global Securities by instructing
                        Paying Agent to withdraw funds from an account
                        maintained by the Company at Paying Agent or by wire
                        transfer to Paying Agent. The Company will confirm any
                        such instructions in writing to Paying Agent. Prior to
                        10 A.M. (New York City time) on the date of Maturity or
                        as soon as possible thereafter, Paying Agent will pay by
                        separate wire transfer (using Fedwire message entry
                        instructions in a form previously agreed to with DTC) to
                        an account at the Federal Reserve Bank of New York
                        previously specified by DTC, in funds available for
                        immediate use by DTC, each payment of principal
                        (together with interest thereon) due on a Global
                        Security on such date. On each Interest Payment Date
                        (other than at Maturity), interest payments shall be
                        made to DTC, in same day funds in accordance with
                        existing arrangements between Paying Agent and DTC. On
                        each such date, DTC will pay, in accordance with its
                        SDFS operating procedures then in effect, such amounts
                        in funds available for immediate use to the respective
                        Participants in whose names the Book-Entry Notes
                        represented by such Global Securities are recorded in
                        the book-entry system maintained by DTC. None of the
                        Company (as issuer or as paying agent), the Trustee or
                        Paying Agent shall have any direct responsibility or
                        liability for the payment by DTC to such Participants of
                        the principal of and interest on the Book-Entry Notes.

                        Withholding Taxes. The amount of any taxes required
                        under applicable law to be withheld from any interest
                        payment on a Book-Entry Note will be determined and
                        withheld by the Participant, indirect participant in DTC

                                       8
<PAGE>
 
                        or other Person responsible for forwarding payments and
                        materials directly to the beneficial owner of such Note.

Procedures upon         Company Notice to Trustee Regarding Exercise of Optional
- ---------------         Reset.  Not less than 45 or more than 60 days before an
Company's Exercise      Optional Reset Date as set forth in a Book Entry Note,
- ------------------      the Company will notify the Trustee whether it is 
of Optional Reset       exercising its option to reset the Interest Rate or 
- -----------------       Spread or Spread Multiplier, as the case may be, for
or Optional             such Book-Entry Note, and if so, (i) the new Interest 
- -----------             Rate or Spread or Spread Multiplier, as the case may be,
Extension of            for such Book-Entry Note during the period from such
- ------------            Optional Reset Date to the next Optional Reset Date as
Maturity:               set forth in such Book-Entry Note or, if there is no
- --------                such next Optional Reset Date, to the Stated Maturity of
                        such Book-Entry Note (the "Subsequent Interest Period");
                        and (ii) the provisions, if any, for redemption of such
                        Book-Entry Note during such Subsequent Interest Period,
                        including the date or dates on which or the period or
                        periods during which such redemption may occur during
                        such Subsequent Interest Period.

                        Company Notice to Trustee Regarding Exercise of Optional
                        --------------------------------------------------------
                        Extension of Maturity. If the Company elects to exercise
                        ---------------------
                        an option, as set forth in a Book-Entry Note, to extend
                        the Stated Maturity of such Note, it will so notify the
                        Trustee no less than 45 or more than 60 days before the
                        Stated Maturity of such Book-Entry Note, and will
                        further indicate (i) the new Stated Maturity; (ii) the
                        Interest Rate or Spread or Spread Multiplier, as the
                        case may be, and (iii) the provisions, if any, for
                        redemption of such Book-Entry Note during such extension
                        period, including the date or dates on which or the
                        period or periods during which such redemption may occur
                        during such extension period.

                        Trustee Notice to DTC Regarding Company's Exercise of
                        -----------------------------------------------------
                        Optional Extension or Reset. Upon receipt of notice from
                        ---------------------------
                        the Company regarding the Company's exercise of either
                        an optional extension of maturity or an optional reset,
                        the Trustee will hand-deliver a notice to DTC not less
                        than 40 days before the Optional Reset Date (in which
                        case a "Reset Notice") or the Stated Maturity (in which
                        case an "Extension Notice"), as the case may be, which
                        Reset Notice or Extension Notice shall identify such
                        Book-Entry Note by CUSIP number and shall contain the
                        information required by the terms of the Book-Entry
                        Note.

                        Trustee Notice to Company Regarding Option to be Repaid.
                        -------------------------------------------------------
                        If, after receipt of either a Reset Notice or an
                        Extension Notice, DTC exercises the option for repayment

                                       9
<PAGE>
 
                        by tendering the Global Security representing the Book-
                        Entry Note to be repaid as set forth in such Note, the
                        Trustee shall give notice to the Company not less than
                        22 days before the Optional Reset Date or the old Stated
                        Maturity, as the case may be, of the principal amount of
                        Book-Entry Notes to be repaid on such Optional Reset
                        Date or old Stated Maturity, as the case may be.

                        Company Notice Regarding New Interest Rate or New Spread
                        --------------------------------------------------------
                        or Spread Multiplier. If the Company elects to revoke
                        --------------------
                        the Interest Rate or Spread or Spread Multiplier and
                        establish a higher interest rate or Spread or Spread
                        Multiplier for an Optional Reset Period or extension
                        period, as the case may be, it shall, not less than 20
                        days before such Optional Reset Date or old Stated
                        Maturity, so notify the Trustee. The Trustee will
                        immediately thereafter notify DTC of the new Interest
                        Rate or Spread or Spread Multiplier applicable to such
                        Book-Entry Note.

                        Trustee Notice to Company Regarding DTC Revocation of
                        -----------------------------------------------------
                        Option to be Repaid. If, after DTC has tendered any 
                        ------------------- Book-Entry Notes for repayment 
                        pursuant to an Extension Notice or an Optional Reset
                        Notice, DTC then revokes such tender for repayment, the
                        Trustee shall give notice to the Company not less than
                        five days prior to the Stated Maturity or Optional Reset
                        Date, as the case may be, of such revocation and of the
                        principal amount of Book-Entry Notes for which tender
                        for repayment has been revoked.

                        Deposit of Repayment Price. On or before any old Stated
                        -------------------------- Maturity where the Maturity
                        has been extended, and on or before an Optional Reset
                        Date, the Company shall deposit with the Paying Agent an
                        amount of money sufficient to pay the principal amount,
                        plus interest accrued to such old Stated Maturity or
                        Optional Reset Date, as the case may be, for all the
                        Book-Entry Notes or portions thereof which are to be
                        repaid on such old Stated Maturity or Optional Reset
                        Date, as the case may be. Such Paying Agent will use
                        such money to repay such Book-Entry Notes pursuant to
                        the terms set forth in such Notes.

Procedures upon         Company Notice to Trustee Regarding Exercise of Optional
- ---------------         --------------------------------------------------------
Company's Exercise      Redemption.  At least 45 days prior to the date on
- ------------------      ----------
of Optional             which it intends to redeem a Book-Entry Note, the
- -----------             Company will notify the Trustee that it is exercising 
Redemption:             such option with respect to exercising such option with 
- ----------              respect to such Book-Entry Note on such date.


                        Trustee Notice to DTC Regarding Company's Exercise of
                        -----------------------------------------------------
                        Optional Redemption. After receipt of notice that the
                        -------------------
                        Company is exercising its option to redeem a Book-Entry

                                      10
<PAGE>
 
                        Note, the Trustee will, at least 30 days before the
                        redemption date for such Book-Entry Note, hand deliver
                        to DTC a notice identifying such Book-Entry Note by
                        CUSIP number and informing DTC of the Company's exercise
                        of such option with respect to such Book-Entry Note.

                        Deposit of Redemption Price. On or before any redemption
                        ---------------------------
                        date, the Company shall deposit with Paying Agent an
                        amount of money sufficient to pay the redemption price,
                        plus interest accrued to such redemption date, for all
                        the Book-Entry Notes or portions thereof which are to be
                        repaid on such redemption date. Such Paying Agent will
                        use such money to repay such Book-Entry Notes pursuant
                        to the terms set forth in such Notes.

Payments of Principal   Trustee Notice to Company of Option to be Repaid.  Upon
- ---------------------   ------------------------------------------------
and Interest upon       receipt of notice of exercise of the option for 
- -----------------       repayment and the Global Securities representing the
Exercise of Optional    Book-Entry Notes so to be repaid as set forth in such 
- --------------------    Notes, the Trustee shall (unless such notice was 
Repayment (Except       received pursuant to the Company's exercise of an
- -----------------       optional reset or an optional extension of maturity, in
Pursuant to Company's   each of which cases the relevant procedures set forth
- ---------------------   above are to be followed) give notice to the Company not
Exercise of Optional    less than 20 days prior to each Optional Repayment Date
- --------------------    of such Optional Repayment Date and of the principal 
Reset or Optional       amount of Book-Entry Notes to be repaid on such Optional
- -----------------       Repayment Date.
Extension):   
- ---------- 

                        Deposit of Repayment Price. On or prior to any Optional
                        --------------------------
                        Repayment Date, the Company shall deposit with such
                        Paying Agent an amount of money sufficient to pay the
                        optional repayment price, and accrued interest thereon
                        to such date, of all the Book-Entry Notes or portions
                        thereof which are to be repaid on such date. Such Paying
                        Agent will use such money to repay such Book-Entry Notes
                        pursuant to the terms set forth in such Notes.

Procedure for Rate      The Company and the Agents will discuss from time to 
- ------------------      time the aggregate principal amount of, the issuance
Setting and Posting:    price of, and the interest rates to be borne by, 
- -------------------     Book-Entry Notes that may be sold as a result of the
                        solicitation of orders by the Agents. If the Company
                        decides to set prices of, and rates borne by, any Book-
                        Entry Notes in respect of which the Agents are to
                        solicit orders (the setting of such prices and rates to
                        be referred to herein as "posting") or if the Company
                        decides to change prices or rates previously posted by
                        it, it will promptly advise the Agents of the prices and
                        rates to be posted.

                                      11
<PAGE>
 
Acceptance and          Unless otherwise instructed by the Company, each Agent
- --------------          will advise the Company promptly by telephone of all 
Rejection of Orders:    orders to purchase Book-Entry Notes received by such
- -------------------     Agent, other than those rejected by it in whole or in
                        part in the reasonable exercise of its discretion.
                        Unless otherwise agreed by the Company and the Agents,
                        the Company has the right to accept orders to purchase
                        Book-Entry Notes and may reject any such orders in whole
                        or in part.

Preparation of Pricing  If any order to purchase a Book-Entry Note is accepted
- ----------------------  by or on behalf of the Company, the Company will 
Supplement:             prepare a pricing supplement (a "Pricing Supplement")
- ----------              reflecting the applicable interest rates and other terms
                        of such Book-Entry Note and will arrange to have the
                        appropriate number of copies thereof filed with the
                        Commission in accordance with the applicable paragraph
                        of Rule 424(b) under the Act and will supply at least
                        ten copies thereof (and additional copies if requested)
                        to the Agent which presented the order (the "Presenting
                        Agent"). The Presenting Agent will cause a Prospectus
                        and Pricing Supplement to be delivered to the purchaser
                        of such Book-Entry Note.

                        In each instance that a Pricing Supplement is prepared,
                        the Presenting Agent will affix the Pricing Supplement
                        to Prospectuses prior to their use. Outdated Pricing
                        Supplements (other than those retained for files) will
                        be destroyed.

Suspension of           The Company reserves the right, in its sole discretion,
- -------------           to instruct the Agents to suspend at any time, for any
Solicitation;           period of time or permanently, the solicitation of 
- ------------            orders to purchase Book-Entry Notes.  Upon receipt of 
Amendment or            such instructions, the Agents will forthwith suspend
- ------------            solicitation until such time as the Company has advised
Supplement:             them that such solicitation may be resumed.
- ----------

                        In the event that at the time the Company suspends
                        solicitation of purchases there shall be any orders
                        outstanding for settlement, the Company will promptly
                        advise the Agents and the Trustee whether such orders
                        may be settled and whether copies of the Prospectus as
                        in effect at the time of the suspension, together with
                        the appropriate Pricing Supplement, may be delivered in
                        connection with the settlement of such orders. The
                        Company will have the sole responsibility for such
                        decision and for any arrangements that may be made in
                        the event that the Company determines that such orders
                        may not be settled or that copies of such Prospectus may
                        not be so delivered.

                                      12
<PAGE>
 
                        If the Company decides to amend or supplement the
                        Registration Statement (as defined in the Agency
                        Agreement) or the Prospectus, it will promptly advise
                        the Agents and furnish the Agents with the proposed
                        amendment or supplement and with such certificates and
                        opinions as are required, all to the extent required by
                        and in accordance with the terms of the Agency
                        Agreement. Subject to the provisions of the Agency
                        Agreement, the Company may file with the Commission any
                        such supplement to the Prospectus relating to the Notes.
                        The Company will provide the Agents, and the Trustee
                        with copies of any such supplement, and confirm to the
                        Agents that such supplement has been filed with the
                        Commission pursuant to the applicable paragraph of Rule
                        424(b).

Procedures For          When the Company has determined to change the interest
- --------------          rates of Book-Entry Notes being offered, it will
Rate Changes:           promptly advise the Agents and the Agents will forthwith
- ------------            suspend solicitation of orders. The Agents will
                        telephone the Company with recommendations as to the
                        changed interest rates. At such time as the Company has
                        advised the Agents of the new interest rates, the Agents
                        may resume solicitation of orders. Until such time only
                        "indications of interest" may be recorded.

Delivery of             A copy of the Prospectus and a Pricing Supplement 
- -----------             relating to a Book-Entry Note must accompany or precede 
Prospectus:             the earliest of any written offer of such Book-Entry
- ----------              Note, confirmation of the purchase of such Book-Entry
                        Note and payment for such Book-Entry Note by its
                        purchaser. If notice of a change in the terms of the
                        Book-Entry Notes is received by the Agents between the
                        time an order for a Book-Entry Note is placed and the
                        time written confirmation thereof is sent by the
                        Presenting Agent to a customer or his agent, such
                        confirmation shall be accompanied by a Prospectus and
                        Pricing Supplement setting forth the terms in effect
                        when the order was placed. Subject to "Suspension of
                        Solicitation; Amendment or Supplement" above, the
                        Presenting Agent will deliver a Prospectus and Pricing
                        Supplement as herein described with respect to each 
                        Book-Entry Note sold by it. The Company will make such
                        delivery if such Book-Entry Note is sold directly by the
                        Company to a purchaser (other than an Agent).

Confirmation:           For each order to purchase a Book-Entry Note solicited
- ------------            by any Agent and accepted by or on behalf of the 
                        Company, the Presenting Agent will issue a confirmation
                        to the purchaser, with a copy to the Company, setting
                        forth the details set forth above and delivery and
                        payment instructions.

                                      13
<PAGE>
 
Settlement:             The receipt by the Company of immediately available 
- ----------              funds in payment for a Book-Entry Note and the
                        authentication and issuance of the Global Security
                        representing such Book-Entry Note shall constitute
                        "settlement" with respect to such Book-Entry Note. All
                        orders accepted by the Company will be settled on the
                        third Business Day following the date of sale of such
                        Book-Entry Note pursuant to the timetable for settlement
                        set forth below unless the Company and the purchaser
                        agree to settlement on another day which shall be no
                        earlier than the next Business Day following the date of
                        sale.

Settlement              Settlement Procedures with regard to each Book-Entry 
- ----------              Note sold by the Company through any Agent, as agent,
Procedures:             shall be as follows:
- ----------
                        A.  The Presenting Agent will advise the Company by
                            telephone of the following settlement information:

                            1.  Principal amount.

                            2.  Maturity Date.

                            3.  In the case of a Fixed Rate Book-Entry Note, the
                                interest rate or, in the case of a Floating Rate
                                Book-Entry Note, the Base Rate, initial interest
                                rate (if known at such time), Index Maturity,
                                Interest Reset Period, Interest Reset Dates,
                                Spread or Spread Multiplier (if any), Minimum
                                Interest Rate (if any) and Maximum Interest Rate
                                (if any).

                            4.  Interest Payment Dates and the Interest Payment
                                Period.

                            5.  Redemption, repayment and extension provisions,
                                if any.

                            6.  Settlement date.

                            7.  Price.

                            8.  Presenting Agent's commission, determined as
                                provided in Section 2 of the Agency Agreement.

                            9.  Whether such Book-Entry Note is issued at an
                                original issue discount and, if so, the total
                                amount of OID, the yield to maturity and the
                                initial accrual period OID.

                                      14
<PAGE>
 
                        B.  The Company will assign a CUSIP number to the Global
                            Security representing such Book-Entry Note and then
                            advise Trustee by telephone (confirmed in writing at
                            any time on the same date) or electronic
                            transmission of the information set forth in
                            Settlement Procedure "A" above, such CUSIP number
                            and the name of the Presenting Agent. The Company
                            will also notify the Presenting Agent by telephone
                            of such CUSIP number as soon as practicable. Each
                            such communication by the Company shall constitute a
                            representation and warranty by the Company to the
                            Trustee and the Presenting Agent that (i) such Note
                            is then, and at the time of issuance and sale
                            thereof will be, duly authorized for issuance and
                            sale by the Company, and (ii) such Note, and the
                            Global Security representing such Note, will conform
                            with the terms of the Indenture for such Note.

                        C.  Trustee will enter a pending deposit message through
                            DTC's Participant Terminal System providing the
                            following settlement information to DTC (which shall
                            route such information to Standard & Poor's
                            Corporation), and the Presenting Agent:

                            1.  The information set forth in Settlement
                                Procedure "A".

                            2.  Identification as a Fixed Rate Book-Entry Note
                                or a Floating Rate Book-Entry Note.

                            3.  Initial Interest Payment Date for such Book-
                                Entry Note, number of days by which such date
                                succeeds the related Regular Record Date and
                                amount of interest payable on such Interest
                                Payment Date.

                            4.  The Interest Payment Period.

                            5.  CUSIP number of the Global Security representing
                                such Book-Entry Note.

                            6.  Whether such Global Security will represent any
                                other Book-Entry Note (to the extent known at
                                such time).

                        D.  To the extent the Company has not already done so,
                            the Company will deliver to the Trustee a Global

                                      15
<PAGE>
 
                            Security in a form that has been approved by the
                            Company, the Agents and the Trustee.

                        E.  The Trustee will complete such Book-Entry Note,
                            stamp the appropriate legend, as instructed by DTC,
                            if not already set forth thereon, and authenticate
                            the Global Security representing such Book-Entry
                            Note.

                        F.  DTC will credit such Book-Entry Note to Trustee's
                            participant account at DTC.

                        G.  Trustee will enter an SDFS deliver order through
                            DTC's Participant Terminal System instructing DTC to
                            (i) debit such Book-Entry Note to Trustee's
                            participant account and credit such Book-Entry Note
                            to the Presenting Agent's participant account and
                            (ii) debit the Presenting Agent's settlement account
                            and credit Trustee's settlement account for an
                            amount equal to the price of such Book-Entry Note
                            less the Presenting Agent's commission. The entry of
                            such a deliver order shall constitute a
                            representation and warranty by Trustee to DTC that
                            (i) the Global Security representing such Book-Entry
                            Note has been issued and authenticated and (ii)
                            Trustee is holding such Global Security pursuant to
                            the Medium-Term Note Certificate Agreement between
                            Trustee and DTC.

                        H.  The Presenting Agent will enter an SDFS deliver
                            order through DTC's Participant Terminal System
                            instructing DTC (i) to debit such Book-Entry Note to
                            the Presenting Agent's participant account and
                            credit such Book-Entry Note to the participant
                            accounts of the Participants with respect to such
                            Book-Entry Note and (ii) to debit the settlement
                            accounts of such Participants and credit the
                            settlement account of the Presenting Agent for an
                            amount equal to the price of such Book-Entry Note.

                        I.  Transfers of funds in accordance with SDFS deliver
                            orders described in Settlement Procedures "G" and
                            "H" will be settled in accordance with SDFS
                            operating procedures in effect on the settlement
                            date.

                        J.  Trustee will, upon receipt of funds from the
                            Presenting Agent in accordance with Settlement
                            Procedure "G", wire transfer to the account of the
                            Company maintained at _______________, Birmingham,
                            Alabama (or if directed in writing by the Company,
                            credit to an account of the Company maintained at

                                      16
<PAGE>
 
                            Trustee) funds available for immediate use in the
                            amount transferred to Trustee in accordance with
                            Settlement Procedure "G".

                        K.  The Presenting Agent will confirm the purchase of
                            such Book-Entry Note to the purchaser either by
                            transmitting to the Participants with respect to
                            such Book-Entry Note a confirmation order or orders
                            through DTC's institutional delivery system or by
                            mailing a written confirmation to such purchaser.

Settlement                  For orders of Book-Entry Notes solicited by any 
- ----------                  Agent and accepted by the Company for settlement
Procedures                  on the first Business Day after the sale date, 
- ----------                  Settlement procedures "A" through "K" set forth 
Timetable:                  above shall be completed as soon as possible but
- ---------                   not later than the respective times (New York City
                            time) set forth below:

                            Settlement
                            Procedure        Time
                            ---------        ----
                                A        11:00 A.M. on the sale date
                                B        12:00 Noon on the sale date
                                C        2:00 P.M. on the sale date
                                D        3:00 P.M. on the day before
                                              settlement
                                E        9:00 A.M. on settlement date
                                F        10:00 A.M. on settlement date
                              G-H        2:00 P.M. on settlement date
                                I        4:45 P.M. on settlement date
                              J-K        5:00 P.M. on settlement date

                        If a sale is to be settled more than one Business Day
                        after the sale date, Settlement Procedures "A", "B" and
                        "C", shall be completed as soon as practicable but no
                        later than 11:00 A.M. and 12:00 Noon on the first
                        Business Day after the sale date and no later than 2:00
                        P.M. on the Business Day before the settlement date,
                        respectively. If the initial interest rate for a
                        Floating Rate Book-Entry Note has not been determined at
                        the time that Settlement Procedure "A" is completed,
                        Settlement Procedures "B" and "C" shall be completed as
                        soon as such rate has been determined but no later than
                        12:00 Noon and 2:00 P.M., respectively, on the Business
                        Day before the settlement date. Settlement Procedure "I"
                        is subject to extension in accordance with any extension
                        of Fedwire closing deadlines and in the other events
                        specified in SDFS operating procedures in effect on the
                        settlement date.

                                      17
<PAGE>
 
                        If settlement of a Book-Entry Note is rescheduled or
                        canceled, Company will instruct Trustee to deliver to
                        DTC, through DTC's Participant Terminal System, a
                        cancellation message to such effect by no later than
                        12:00 noon on the Business Day immediately preceding the
                        scheduled settlement date and the Trustee will enter
                        such message no later than by 2:00 P.M. on the Business
                        Day immediately preceding the scheduled settlement date.

Failure to Settle:      If Trustee fails to enter an SDFS deliver order with 
- -----------------       respect to a Book-Entry Note pursuant to Settlement
                        Procedure "G", Trustee may deliver to DTC, through DTC's
                        Participant Terminal System, as soon as practicable, a
                        withdrawal message instructing DTC to debit such Book-
                        Entry Note to Trustee's participant account provided
                        that Trustee's participant account contains a principal
                        amount of the Global Security representing such Book-
                        Entry Note that is at least equal to the principal
                        amount to be debited. If a withdrawal message is
                        processed with respect to all the Book-Entry Notes
                        represented by a Global Security, the Trustee will mark
                        such Global Security "canceled" in accordance with the
                        Indenture and so advise the Company and Trustee will
                        make appropriate entries in its records and return the
                        canceled Global Securities to Company. The CUSIP number
                        assigned to such Global Security shall, in accordance
                        with CUSIP Service Bureau procedures, be canceled and
                        not reassigned until the Book-Entry Notes represented by
                        such Global Security have matured or been redeemed. If a
                        withdrawal message is processed with respect to one or
                        more, but not all, of the Book-Entry Notes represented
                        by a Global Security, Trustee will exchange such Book-
                        Entry Note for two Global Securities, one of which shall
                        represent such Book-Entry Notes and shall be canceled
                        immediately after issuance and the other of which shall
                        represent the other Book-Entry Notes previously
                        represented by the surrendered Global Security and shall
                        bear the CUSIP number of the surrendered Global
                        Security.

                        If the purchase price for any Book-Entry Note is not
                        timely paid to the Participants with respect to such
                        Note by the beneficial purchaser thereof (or a Person,
                        including an indirect participant in DTC, acting on
                        behalf of such purchaser), such Participants and, in
                        turn, the Presenting Agent may enter SDFS deliver orders
                        through DTC's Participant Terminal System reversing the
                        orders entered pursuant to Settlement Procedures "H" and
                        "G", respectively. Thereafter, Trustee will deliver the
                        withdrawal message and take the related actions
                        described in the preceding paragraph. If such failure
                        shall have occurred for any reason other than a default
                        by the Presenting Agent in the performance of its
                        obligations hereunder and under the Agency Agreement,

                                      18
<PAGE>
 
                        then the Company will reimburse the Presenting Agent or
                        Trustee as applicable, on an equitable basis for the
                        loss of the use of the funds during the period when they
                        were credited to the account of the Company.

                        Notwithstanding the foregoing, upon any failure to
                        settle with respect to a Book-Entry Note, DTC may take
                        any actions in accordance with its SDFS operating
                        procedures then in effect. In the event of a failure to
                        settle with respect to one or more, but not all, of the
                        Book-Entry Notes to have been represented by a Global
                        Security, Trustee will provide, in accordance with
                        Settlement Procedure "E", for the authentication and
                        issuance of a Global Security representing the other
                        Book-Entry Notes to have been represented by such Global
                        Security and will make appropriate entries in its
                        records.

Trustee Not to          Nothing herein shall be deemed to require the Trustee 
- --------------          to risk or expend its own funds in connection with any
Risk Funds:             payment to the Company, DTC, the Agents or the 
- ----------              purchaser, it being understood by all parties
                        that payments made by the Trustee to the Company, DTC,
                        the Agents or the purchaser shall be made only to the
                        extent that funds are provided to the Trustee for such
                        purpose.

Payment of              Each Agent shall forward to the Company on a monthly 
- ----------              basis, a statement of the out-of-pocket expenses 
Expenses:               incurred by such Agent during that month that are
- --------                reimbursable to it pursuant to the terms of the
                        Agency Agreement. The Company will remit payment to the
                        Agents currently on a monthly basis.

Advertising Costs:      The Company will determine with the Agents the amount of
- -----------------       advertising that may be appropriate in soliciting offers
                        to purchase the Book-Entry Notes. Advertising expenses
                        will be paid by the Company.

Periodic                Periodically, Trustee will send to the Company a 
- --------                statement setting forth the principal amount of
Statements from         Book-Entry Notes Outstanding as of that date and setting
- ---------------         forth a brief description of any sales of Book-Entry
Trustee:                Notes which the Company has advised Trustee but which
- -------                 have not yet been settled.


                                      19
<PAGE>
 
                                    PART II
               Administrative Procedures for Certificated Notes

    Trustee will serve as registrar and transfer agent in connection with the
Certificated Notes.

Issuance:               Each Certificated Note will be dated and issued as of
- --------                the date of its authentication by the Trustee. Each
                        Certificated Note will bear an Original Issue Date,
                        which will be (i) with respect to an original
                        Certificated Note (or any portion thereof), its original
                        issuance date (which will be the settlement date) and
                        (ii) with respect to any Certificated Note (or portion
                        thereof) issued subsequently upon transfer or exchange
                        of a Certificated Note or in lieu of a destroyed, lost
                        or stolen Certificated Note, the Original Issue Date of
                        the predecessor Certificated Note, regardless of the
                        date of authentication of such subsequently issued
                        Certificated Note.

Registration:           Certificated Notes will be issued only in fully
- ------------            registered form without coupons.

Transfers and           A Certificated Note may be presented for transfer or 
- -------------           exchange at the principal corporate trust office of
for Exchanges:          Trustee in Jacksonville, Florida. Certificated Notes
- -------------           will be exchangeable for other Certificated Notes having
                        identical terms but different authorized denominations
                        without service charge. Certificated Notes will not be
                        exchangeable for Book-Entry Notes.

Maturities:             Each Certificated Note will mature on a date nine months
- ----------              or more after the settlement date for such Note. A
                        Floating Rate Certificated Note will mature only on an
                        Interest Payment Date for such Note. Any Note
                        denominated in Japanese yen will mature on a date not
                        less than one year from the Original Issue Date (as
                        defined below) for such Note. Any Note denominated in
                        Pounds Sterling will mature on a date not less than one
                        year, nor more than five years, after its Original Issue
                        Date.

Denominations:          The denomination of any Certificated Note denominated in
- -------------           U.S. dollars will be a minimum of $1,000 or any amount
                        in excess thereof that is an integral multiple of
                        $1,000. The authorized denominations of Certificated
                        Notes denominated in any other currency will be
                        specified pursuant to "Settlement Procedures" below.

Interest:               General. Interest, if any, on each Certificated Note
- --------                -------
                        will accrue from the original issue date for the first
                        interest period or the last date to which interest has
                        been paid, if any, for each subsequent interest period,
<PAGE>
 
                        and will be calculated and paid in the manner described
                        in such Note and in the Prospectus, as supplemented by
                        the applicable Pricing Supplement. Unless otherwise
                        specified therein, each payment of interest on a
                        Certificated Note will include interest accrued to but
                        excluding the Interest Payment Date (provided that, in
                        the case of Certificated Notes which reset daily or
                        weekly, interest payments will include accrued interest
                        to but excluding the Regular Record Date immediately
                        preceding the Interest Payment Date) or to but excluding
                        Maturity (other than a Maturity of a Fixed Rate
                        Certificated Note occurring on the 31st day of a month,
                        in which case such payment of interest will include
                        interest accrued to but excluding the 30th day of such
                        month).

                        Regular Record Dates. The Regular Record Dates with
                        --------------------
                        respect to any Interest Payment Date shall be the date
                        fifteen calendar days immediately preceding such
                        Interest Payment Date (whether or not a Business Day).

                        Fixed Rate Certificated Notes. Unless otherwise
                        -----------------------------
                        specified pursuant to Settlement Procedure "A" below,
                        interest payments on Fixed Rate Certificated Notes will
                        be made semiannually on ________ and _________ of each
                        year and at Maturity; provided, however, that if any
                                              --------  -------
                        Interest Payment Date for a Fixed Rate Certificated Note
                        is not a Business Day, the payment due on such day shall
                        be made on the next succeeding Business Day and no
                        interest shall accrue on such payment for the period
                        from and after such Interest Payment Date; provided
                                                                   --------
                        further, that in the case of a Fixed Rate Certificated
                        -------
                        Note issued between a Regular Record Date and an
                        Interest Payment Date, the first interest payment will
                        be made on the Interest Payment Date following the next
                        succeeding Regular Record Date.

                        Floating Rate Certificated Notes. Interest payments will
                        --------------------------------
                        be made on Floating Rate Certificated Notes monthly,
                        quarterly, semi-annually or annually. Interest will be
                        payable, in the case of Floating Rate Certificated Notes
                        with a monthly Interest Payment Period, on the third
                        Wednesday of each month; with a quarterly interest
                        Payment Period, on the third Wednesday of March, June,
                        September and December of each year; with a semi-annual
                        Interest Payment Period, on the third Wednesday of the
                        two months specified pursuant to Settlement Procedure
                        "A" below; and with an annual Interest Payment Period,
                        on the third Wednesday of the month specified pursuant
                        to Settlement Procedure "A" below; provided, however,
                                                           --------  -------
                        that if an Interest Payment Date for a Floating Rate
                        Certificated Note would otherwise be a day that is not a
                        Business Day with respect to such Floating Rate

                                       2
<PAGE>
 
                        Certificated Note, such Interest Payment Date will be
                        the next succeeding Business Day with respect to such
                        Floating Rate Certificated Note, except in the case of a
                        Floating Rate Certificated Note for which the Base Rate
                        is LIBOR, if such Business Day is in the next succeeding
                        calendar month, such Interest Payment Date will be the
                        immediately preceding Business Day; and provided
                                                                --------
                        further, that in the case of a Floating Rate
                        -------
                        Certificated Note issued between a Regular Record Date
                        and an interest Payment Date, the first interest payment
                        will be made on the Interest Payment Date following the
                        next succeeding Regular Record Date.

Calculation of          Fixed Rate Certificated Note.  Interest on Fixed Rate
- --------------          Certificated Notes (including interest for partial
Interest:               periods) will be calculated on the basis of a 360-day
- --------                year of twelve 30-day months.

                        Floating Rate Certificated Notes. Interest rates on
                        --------------------------------
                        Floating Rate Certificated Notes will be determined as
                        set forth in the form of Notes. Interest on Floating
                        Rate Certificated Notes, except as otherwise set forth
                        therein, will be calculated on the basis of actual days
                        elapsed and a year of 360 days, except that in the case
                        of a Floating Rate Certificated Note for which the Base
                        Rate is Treasury Rate, interest will be calculated on
                        the basis of the actual number of days in the year.

Payments of             Interest, if any, on each Certificated Note will be
- -----------             calculated and and paid in the manner described in such
principal and           Note and in the Prospectus, as supplemented by the
- -------------           applicable Pricing Supplement. Unless otherwise provided
Interest:               in the Indenture or the Certificated Note, the first
- --------                payment of interest on any Certificated Note originally
                        issued between a Record Date and an Interest Payment
                        Date will be made on the next succeeding Interest
                        Payment Date. Interest payable at the Maturity of a
                        Certificated Note will be payable to the Person to whom
                        the principal of such Note is payable. Unless other
                        arrangements are made, all interest payments (excluding
                        interest payments made on the Maturity Date) will be
                        made by check mailed to the person entitled thereto as
                        provided above; provided, however, that the holder of
                                        --------  -------
                        $10,000,000 (or the equivalent thereof in other
                        currencies) or more of Certificated Notes with similar
                        tenor and terms will be entitled to receive payment by
                        wire transfer in U.S. dollars.

                        Within 10 days following each Record Date, the Trustee
                        will inform the Company of the total amount of the
                        interest payments to be made by the Company on the next
                        succeeding Interest Payment Date. The Trustee will
                        provide monthly to the Company a list of the principal

                                       3
<PAGE>
 
                        and interest to be paid on Certificated Notes maturing
                        in the next succeeding month.

                        Trustee will be responsible for withholding taxes on
                        interest paid on Certificated Notes as required by
                        applicable law.
        
                        If the Maturity of a Certificated Note is not a Business
                        Day, the payment due on such day shall be made on the
                        next succeeding Business Day and no interest shall
                        accrue on such payment for the period from and after
                        such Maturity.

Procedures upon         Company Notice to Trustee Regarding Exercise of Optional
- ---------------         --------------------------------------------------------
Company's Exercise      Reset. Not less than 45 or more more than 60 days before
- ------------------      -----
of Optional Reset       an Optional Reset Date as set forth in a Certificated
- -----------------       Note, the Company will notify the Trustee whether it is
or Optional             exercising its option to reset the Interest Rate or
- -----------             Spread or Spread Multiplier, as the case may be, for
Extension of            such certificated Note, and if so, (i) the new Interest
- ------------            Rate or Spread or Spread Multiplier, as the case may be,
Maturity:               for such Certificated Note during the period from such
- --------                Optional Reset Date to the next Optional Reset Date as
                        set forth in such Certificated Note or, if there is no
                        such next Optional Reset Date, to the Maturity Date of
                        such Certificated Note (the "Subsequent Interest
                        Period"); and (ii) the provisions, if any, for
                        redemption of such Certificated Note during such
                        Subsequent Interest Period, including the date or dates
                        on which or the period or periods during which such
                        redemption may occur during such Subsequent Interest
                        Period.

                        Company Notice to Trustee Regarding Exercise of Optional
                        --------------------------------------------------------
                        Extension of Maturity. If the Company elects to exercise
                        ---------------------
                        an option, as set forth in a Certificated Note, to
                        extend the Maturity Date of such Note, it will so notify
                        the Trustee no less than 45 or more than 60 days before
                        the Maturity Date of such Certificated Note, and will
                        further indicate (i) the new Maturity Date; (ii) the
                        Interest Rate or Spread or Spread Multiplier, as the
                        case may be, and (iii) the provisions, if any, for
                        redemption of such Certificated Note during such
                        extension period, including the date or dates on which
                        or the period or periods during which such redemption
                        may occur during such extension period.

                        Trustee Notice to Holders Regarding Company's Exercise
                        ------------------------------------------------------
                        of Optional Extension or Reset. Upon receipt of notice
                        ------------------------------
                        from the Company regarding the Company's exercise of
                        either an optional extension of maturity or an optional
                        reset, the Trustee will mail a notice, first class,
                        postage prepaid, to the Holder not less than 40 days
                        before the Optional Reset Date (in which case a "Reset

                                       4
<PAGE>
 
                        Notice") or the Maturity Date (in which case an
                        "Extension Notice"), as the case may be, which Reset
                        Notice or Extension Notice shall contain the information
                        required by the terms of the Certificated Note.

                        Trustee Notice to Company Regarding Option to be Repaid.
                        -------------------------------------------------------
                        If, after receipt of either a Reset Notice or an
                        Extension Notice, any Holder of a Certificated Note
                        exercises the option for repayment by tendering the
                        Certificated Note to be repaid as set forth in the
                        Certificated Note, the Trustee shall give notice to the
                        Company not less than 22 days before the Optional Reset
                        Date or the old Maturity Date, as the case may be, of
                        the principal amount of Certificated Notes to be repaid
                        on such Optional Reset Date or old Maturity Date, as the
                        case may be.

                        Company Notice Regarding New Interest Rate or New Spread
                        --------------------------------------------------------
                        or Spread Multiplier. If the Company elects to revoke
                        --------------------
                        the Interest Rate or Spread or Spread Multiplier and
                        establish a higher interest rate or Spread or Spread
                        Multiplier for an Optional Reset Period or extension
                        period, as the case may be, it shall, not less than 20
                        days before such Optional Reset Date or old Maturity
                        Date, so notify the Trustee. The Trustee will
                        immediately thereafter notify the Holder of such
                        Certificated Note, by first class mail, postage prepaid
                        of the new Interest Rate or Spread or Spread Multiplier
                        applicable to such Certificated Note.

                        Trustee Notice to Company Regarding Holders Revocation
                        ------------------------------------------------------
                        of Option to be Repaid. If, after the Holder has
                        ----------------------
                        tendered any Certificated Notes for repayment pursuant
                        to an Extension Notice or an Optional Reset Notice, such
                        Holder then revokes such tender for repayment, the
                        Trustee shall give notice to the Company not less than
                        five days prior to the Maturity Date or Optional Reset
                        Date, as the case may be, of such revocation and of the
                        principal amount of Certificated Notes for which tender
                        for repayment has been revoked.

                        Deposit of Repayment Price. On or before any old
                        --------------------------
                        Maturity Date where the Maturity has been extended, and
                        on or before an Optional Reset Date, the Company shall
                        deposit with the Trustee an amount of money sufficient
                        to pay the principal amount, plus interest accrued to
                        such old Maturity Date or Optional Reset Date, as the
                        case may be, for all the Certificated Notes or portions
                        thereof which are to be repaid on such old Maturity Date
                        or Optional Reset Date, as the case may be. Such Trustee
                        will use such money to repay such Certificated Notes
                        pursuant to the terms set forth in such Notes.

                                       5
<PAGE>
 
Procedures upon         Company Notice to Trustee Regarding Exercise of Optional
- ---------------         --------------------------------------------------------
Company's               Redemption. At least 45 days prior to the date on which
- ---------               ----------
Exercise of             it prior to the date on which it intends to redeem a 
- -----------             Certificated Note, the Company will notify the Trustee
Optional                that it is exercising such option with respect to such
- --------                Certificated Note on such date.                       
Redemption:   
- ----------    
                        Trustee Notice to Holders Regarding Company's Exercise
                        ------------------------------------------------------
                        of Optional Redemption. After receipt of notice that the
                        ----------------------
                        Company is exercising its option to redeem a
                        Certificated Note, the Trustee will, at least 30 days
                        before the redemption date for such Certificated Note,
                        mail a notice, first class, postage prepaid, to the
                        Holder of such Certificated Note informing such Holder
                        of the Company's exercise of such option with respect to
                        such Certificated Note.

                        Deposit of Redemption Price. On or before any redemption
                        ---------------------------
                        date, the Company shall deposit with such Trustee an
                        amount of money sufficient to pay the redemption price,
                        plus interest accrued to such redemption date, for all
                        the Certificated Notes or portions thereof and which are
                        to be repaid on such redemption date. Such Trustee will
                        use such money to repay such Certificated Notes pursuant
                        to the terms set forth in such Notes.

Payments of             Trustee Notice to Company of Option to be Repaid. Upon
- -----------             ------------------------------------------------
Principal and           receipt of notice of exercise of the option for
- -------------           repayment and the Global Securities representing the
Interest Upon           Certificated Notes so to be repaid as set forth in such
- -------------           Notes, the Trustee shall (unless such notice was
Exercise of             received pursuant to the Company's exercise of an
- -----------             optional reset or an optional extension of maturity, in
Optional Repayment      each of which cases the relevant procedures set forth
- ------------------      above are to be followed) give notice to the Company not
(Except Pursuant        less than 20 days prior to each Optional Repayment Date
- ----------------        of such Optional Repaymetn Date and of the principal
to Company's            amount of Certificated Notes to be repaid on such
- ------------            Optional Repayment Date.
Exercise of         
- -----------         
Optional Reset      
- --------------      
or Optional         
- -----------
Extension):
- ----------

                        Deposit of Repayment Price. On or prior to any Optional
                        --------------------------
                        Repayment Date, the Company shall deposit with such
                        Trustee an amount of money sufficient to pay the
                        optional repayment price, and accrued interest thereon
                        to such date, of all the Certificated Notes or portions
                        thereof which are to be repaid on such date. Such
                        Trustee will use such money to repay such Certificated
                        Notes pursuant to the terms set forth in such Notes.

                                       6
<PAGE>
 
Procedure for Rate      The Company and the Agents will discuss from time to
- ------------------      time the aggregate principal amount of, the issuance
Setting and             price of, and the interest rates to be borne by, Notes
- -----------             that may be sold as a result of the solicitation of
Posting:                orders by the Agents. If the Company decides to set
- -------                 prices of, and rates borne by, any Notes in respect of
                        which the Agents are to solicit orders (the setting of
                        such prices and rates to be referred to herein as
                        "posting") or if the Company decides to change prices or
                        rates previously posted by it, it will promptly advise
                        the Agents of the prices and rates to be posted.

Acceptance and          Unless otherwise instructed by the Company, each Agent
- --------------          will advise the Company promptly by telephone of all
Rejection of            orders to purchase Certificated Notes received by such
- ------------            Agent, other than those rejected by it in whole or in
Orders:                 part in the reasonable exercise of its discretion.
- ------                  Unless otherwise agreed by the Company and the Agents,
                        the Company has the sole right to accept orders to
                        purchase Certificated Notes and may reject any such
                        orders in whole or in part. Before accepting any order
                        to purchase a Certificated Note to be settled in less
                        than three Business Days, the Company shall verify that
                        the Trustee will have adequate time to prepare and
                        authenticate such Note.

Preparation of          If any order to purchase a Certificated Note is accepted
- --------------          by or on behalf of the Company, the Company will prepare
Pricing                 a pricing supplement (a "Pricing Supplement") reflecting
- -------                 the interest rates and other terms of such Certified
Supplement:             Note and will arrange to have the applicable number of
- ----------              copies thereof filed with the Commission in accordance
                        with the applicable paragraph of Rule 424(b) under the
                        Act and will supply at least ten copies thereof (and
                        additional copies if requested) to the Agent which
                        presented the order (the "Presenting Agent"). The
                        Presenting Agent will cause a Prospectus and Pricing
                        Supplement to be delivered to the purchaser of such
                        Certificated Note.

                        In each instance that a Pricing Supplement is prepared,
                        the Presenting Agent will affix the Pricing Supplement
                        to Prospectuses prior to their use. Outdated Pricing
                        Supplements (other than those retained for files) will
                        be destroyed.

Suspension of           The Company reserves the right, in it sole discretion to
- -------------           instruct the Agents to suspend at any time for any
Solicitation;           period of time or permanently, the solicitation of
- ------------            orders to purchase Certificated Notes. Upon receipt of
Amendment or            such instructions, the Agents will forthwith suspend
- ------------            solicitation until such time as the Company has advised
Supplement:             them that such solicitation may be resumed.
- ----------
                        In the event that at the time the Company suspends
                        solicitation of purchases there shall be any orders

                                       7
<PAGE>
 
                        outstanding for settlement, the Company will promptly
                        advise the Agents and the Trustee whether such orders
                        may be settled and whether copies of the Prospectus as
                        in effect at the time of the suspension, together with
                        the appropriate Pricing Supplement, may be delivered in
                        connection with the settlement of such orders. The
                        Company will have the sole responsibility for such
                        decision and for any arrangements that may be made in
                        the event that the Company determines that such orders
                        may not be settled or that copies of such Prospectus may
                        not be so delivered.

                        If the Company decides to amend or supplement the
                        Registration Statement or the Prospectus, it will
                        promptly advise the Agents and furnish the Agents with
                        the proposed amendment or supplement and with such
                        certificates and opinions as are required, all to the
                        extent required by and in accordance with the terms of
                        the Agency Agreement. Subject to the provisions of the
                        Agency Agreement, the Company may file with the
                        Commission any supplement to the Prospectus relating to
                        the Notes. The Company will provide the Agents and the
                        Trustee with copies of any such supplement, and confirm
                        to the Agents that such supplement has been filed with
                        the Commission pursuant to the applicable paragraph of
                        Rule 424(b).
              

Procedure for           When the Company has determined to change the interest
- -------------           rates of Certificated Notes being offered, it will
Rate Changes:           promptly advise the Agents and the Agents will forthwith
- ------------            suspend solicitation of orders. The Agents will
                        telephone the Company with recommendations as to the
                        changed interest rates. At such time as the Company has
                        advised the Agents of the new interest rates, the Agents
                        may resume solicitation of orders. Until such time only
                        "indications of interest" may be recorded.

Delivery of             A copy of the Prospectus and a Pricing Supplement
- -----------             relating to a Certificated Note must accompany or
Prospectus:             precede the earliest of any written offer of such
- ----------              Certificated Note, confirmation of the purchase of such
                        Certificated Note and payment for such Certificated Note
                        by its purchaser. If notice of a change in the terms of
                        the Certificated Notes is received by the Agents between
                        the time an order for a Certificated Note is placed and
                        the time written confirmation thereof is sent by the
                        Presenting Agent to a customer or his agent, such
                        confirmation shall be accompanied by a Prospectus and
                        Pricing Supplement setting forth the terms in effect
                        when the order was placed. Subject to "Suspension of
                        Solicitation; Amendment or Supplement" above, the
                        Presenting Agent will deliver a Prospectus and Pricing
                        Supplement as herein described with respect to each
                        Certificated Note sold by it. The Company will make such
<PAGE>
 
                        delivery if such Certificated Note is sold directly by
                        the Company to a purchaser (other than any Agent).

Confirmation:           For each order to purchase a Certificated Note solicited
- ------------            by any Agent and accepted by or on behalf of the
                        Company, the Presenting Agent will issue a confirmation
                        to the purchaser, with a copy to the Company, setting
                        forth the details set forth above and delivery and
                        payment instructions.

Settlement:             The receipt by the Company of immediately available
- ----------              funds in exchange for an authenticated Certificated Note
                        delivered to the Presenting Agent and the Presenting
                        Agent's delivery of such Certificated Note against
                        receipt of immediately available funds shall, with
                        respect to such Certificated Note, constitute
                        "settlement". All orders accepted by the Company will be
                        settled on the third Business Day following the date of
                        sale pursuant to the timetable for settlement set forth
                        below, unless the Company and the purchaser agree to
                        settlement on another day which shall be no earlier than
                        the next Business Day following the date of sale.

Settlement              Settlement Procedures with regard to each Certificated
- ----------              Note sold by the Company through any Agent, as agent,
Procedures:             shall be as follows:
- ----------
                        A. The Presenting Agent will advise the Company by
                           telephone of the following settlement information, in
                           time for the Trustee to prepare and authenticate the
                           required Note:

                           1.  Name in which such Certificated Note is to be
                               registered ("Registered Owner").

                           2.  Address of the Registered Owner and address for
                               payment of principal and interest.

                           3.  Taxpayer identification number of the Registered
                               Owner (if available).

                           4.  Principal amount.

                           5.  Maturity Date.

                           6.  In the case of a Fixed Rate Certificated Note,
                               the interest rate or, in the case of a Floating
                               Rate Certificated Note, the initial interest rate
                               (if known at such time), Base Rate, Index
                               Maturity, Interest Reset Period, Interest Reset
                               Dates, Spread or Spread Multiplier (if any),

                                       9
<PAGE>
 
                               Minimum Interest Rate (if any) and Maximum
                               Interest Rate (if any).

                           7.  Interest Payment Dates and the Interest Payment
                               Period.

                           8.  Specified Currency and whether the option to
                               elect payment in a Specified Currency applies and
                               if the Specified Currency is not U.S. dollars,
                               the authorized denominations.

                           9.  Redemption, repayment or extension provisions, if
                               any.

                          10.  Settlement date.

                          11.  Price (including currency).

                          12.  Presenting Agent's commission, determined as
                               provided in Section 2 of the Agency Agreement.

                          13.  Whether such Certificated Note is issued at an
                               original issue discount, and, if so, the total
                               amount of OID, the yield to maturity and the
                               initial accrual period OID.

                        B.  The Company will advise Trustee by telephone
                            (confirmed in writing at any time on the sale date)
                            or electronic transmission of the information set
                            forth in Settlement Procedure "A" above and the name
                            of the Presenting Agent. Before accepting any offer
                            to purchase a Certificated Note to be settled in
                            less than three Business Days, the Company shall
                            verify that the Trustee will have adequate time to
                            prepare and authenticate such Note.

                        C.  The Company will deliver to Trustee a pre-printed
                            four-ply packet for such Certificated Note, which
                            packet will contain the following documents in forms
                            that have been approved by Company, the Agents and
                            the Trustee:

                            1.  Certificated Note with customer confirmation.

                            2.  Stub One - For Trustee.

                            3.  Stub Two - For the Presenting Agent.

                                      10
<PAGE>
 
                            4.  Stub Three - For the Company.

                        D.  The Trustee will prepare such Certificated Note and
                            will authenticate such Certificated Note on the
                            settlement date and deliver it (with the
                            confirmation) and Stubs One and Two to the
                            Presenting Agent, all in accordance with the written
                            directions (or oral instructions confirmed in
                            writing on the next Business Day) of the Company,
                            and the Presenting Agent will acknowledge receipt of
                            the Note by stamping or otherwise marking Stub One
                            and returning it to the Trustee. Such delivery will
                            be made only against such acknowledgment of receipt.
                            In the event that the instructions given by the
                            Presenting Agent for payment to the account of the
                            Company are revoked, the Company will as promptly as
                            possible wire transfer to the account of the
                            Presenting Agent an amount of immediately available
                            funds equal to the amount of such payment made.

                        E.  The Presenting Agent will deliver such Certificated
                            Note (with the confirmation) to the customer against
                            payment in immediately payable funds. The Presenting
                            Agent will obtain the acknowledgement of receipt of
                            such Certificated Note by retaining Stub Two.
            
                        F.  Trustee will send Stub Three to the Company by 
                            first-class mail.

Settlement              For orders of Certificated Notes solicited by any Agent,
- ----------              as agent, and accepted by the Company, Settlement
Procedures              Procedures "A" through "F" set forth above shall be
- ----------              completed on or before the respective times (New York
Timetable:              City time) set forth below:
- ---------

                        Settlement                                         
                        Procedure      Time                        
                        ----------     ----
                            A          2:00 P.M. on the day before settlement  
                            B-C        3:00 P.M. on the day before settlement
                            D          2:15 P.M. on settlement date            
                            E          3:00 P.M. on settlement date            
                            F          5:00 P.M. on settlement date             

Failure to              If a purchaser fails to accept delivery of and make
- ----------              payment for any Certificated Note, the Presenting Agent
Settle:                 will notify the Company and Trustee by telephone and
- ------                  return such Certificated Note to the Trustee. Upon
                        receipt of such notice, the Company will immediately
                        wire transfer to the account of the Presenting 

                                      11
<PAGE>
 
                        Agent an amount equal to the amount previously credited
                        to the account of Company in respect of such
                        Certificated Note. Such wire transfer will be made on
                        the settlement date, if possible, and in any event not
                        later than the Business Day following the settlement
                        date. If the failure shall have occurred for any reason
                        other than a default by the Presenting Agent in the
                        performance of its obligations hereunder and under the
                        Agency Agreement, then the Company will reimburse the
                        Presenting Agent or Trustee as appropriate, on an
                        equitable basis for its loss of the use of the funds
                        during the period when they were credited to the account
                        of the Company. Immediately upon receipt of the
                        Certificated Note in respect of which such failure
                        occurred, the Trustee will cancel such Certificated Note
                        in accordance with the Indenture and so advise the
                        Company and Trustee will make appropriate entries in its
                        records and send such cancelled note or other evidence
                        of cancellation in accordance with the terms of the
                        indenture.

Trustee Not to          Nothing herein shall be deemed to require the Trustee to
- --------------          risk or expend its own funds in connection with any
Risk Funds:             payment to the Company, the Agents or the purchaser, it
- ----------              being understood by all parties that payments made by
                        the Trustee to the Company, the Agents or the purchaser
                        shall be made only to the extent that funds are provided
                        to the Trustee for such purpose.

Payment of              Each Agent shall forward to the Company, on a monthly
- ----------              basis, a statement of the out-of-pocket expenses
Expenses:               incurred by such Agent during that month that are
- --------                reimbursable to it pursuant to the terms of the Agency
                        Agreement. The Company will remit payment to the Agents
                        currently on a monthly basis.

Advertising Costs:      The Company will determine with the Agents the amount of
- -----------------       advertising that may be appropriate in soliciting orders
                        to purchase the Certificated Notes. Advertising expenses
                        will be paid by the Company.

Periodic                Periodically, Trustee will send to the Company a
- --------                statement setting forth the principal amount of
Statements              Certificated Notes Outstanding as of that date and
- ----------              setting forth a brief description of any sales of
from Trustee:           Certificated Notes which the Company has advised Trustee
- ------------            but which have not yet been settled.

                                      12
<PAGE>
 
                                                                      EXHIBIT B


                              Energen Corporation

                               Medium-Term Notes

                            Due Nine Months or More
                              from Date of Issue

                                TERMS AGREEMENT


                                                                         , 199
                                                            ------------      --


Attention:

        Subject in all respects to the terms and conditions of the Selling
Agency Agreement (the "Agreement") dated            , 1998, between [Agent's
                                         -----------
Name] and you, the undersigned agrees to purchase the following Notes of Energen
Corporation:


Aggregate Principal Amount:   $

Interest Rate:

Date of Maturity:

Interest Payment Dates:

Regular Record Dates:

Discount or Commission:                  % of Principal Amount       
                                                                     
Purchase Price:                          % of Principal Amount       
                                         [plus accrued interest from 
                                                    , 199  ]         
                                          ----------     --           
Purchase Date and Time:

Place for Delivery of Notes
and Payment Therefor:
<PAGE>
 
Method of Payment:

Modification, if any, in
the requirements to
deliver the documents
specified in Section 6(b)
of the Agreement:

Period during which additional
Notes may not be sold pursuant
to Section 4(m) of the Agreement:



                                         [Purchaser]

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


Accepted:

Energen Corporation

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



                                       2

<PAGE>
 
                                                                  Exhibit 1(b)

                              Energen Corporation

                        Form of Underwriting Agreement


                                                            _____________, 199__
                                                              New York, New York

To the Representatives
 named in Schedule I hereto
 of the Underwriters named
 in Schedule II hereto

Dear Sirs:

Energen Corporation, an Alabama corporation (the "Company"), proposes to sell to
the underwriters named in Schedule II hereto (the "Underwriters"), for whom you
(the "Representatives") are acting as representatives, (i) the number of shares
of Common Stock, $.01 par value, of the Company ("Common Stock"), set forth in
Schedule I hereto (the "Underwritten Securities") and (ii) an option described
in Section 2 hereof to purchase all or any part of the number of additional
shares of Common Stock to cover overallotments as is specified in Schedule I
hereto (the "Option Securities"; the Option Securities, together with the
Underwritten Securities, being hereinafter called the "Securities").  If the
firm or firms listed in Schedule II hereto include only the firm or firms listed
in Schedule I hereto, then the terms "Underwriters" and "Representatives," as
used herein, shall each be deemed to refer to such firm or firms.

  1. Representations and Warranties. The Company represents and warrants to, and
agrees with, each Underwriter as set forth below in this Section 1. Certain
terms used in this Section 1 are defined in paragraph (c) hereof.

     (a) If the offering of the Securities is a Delayed Offering (as specified
in Schedule I hereto), paragraph (i) below is applicable and, if the offering of
the Securities is a Non-Delayed Offering (as so specified), paragraph (ii) below
is applicable.

         (i) The Company meets the requirements for use of Form S-3 under the
    Securities Act of 1933 (the "Act") and has filed with the Securities and
    Exchange Commission (the "Commission") a registration statement (the file
    number of which is set forth in Schedule I hereto) on such Form, including a
    basic prospectus, for registration under the Act of the offering and sale of
    the Securities. The Company may have filed one or more amendments thereto,
    and may have used a Preliminary Final Prospectus, each of which has
    previously been furnished to you. Such registration statement, as so
    amended, has become effective. The offering of the Securities is a Delayed
    Offering and, although the Basic Prospectus may not include all the
    information with respect to the
<PAGE>
 
    Securities and the offering thereof required by the Act and the rules
    thereunder to be included in the Final Prospectus, the Basic Prospectus
    includes all such information required by the Act and the rules thereunder
    to be included therein as of the Effective Date. The Company will next file
    with the Commission pursuant to Rules 415 and 424(b)(2) or (5) a final
    supplement to the form of prospectus included in such registration statement
    relating to the Securities and the offering thereof. As filed, such final
    prospectus supplement shall include all required information with respect to
    the Securities and the offering thereof and, except to the extent the
    Representatives shall agree in writing to a modification, shall be in all
    substantive respects in the form furnished to you prior to the Execution
    Time or, to the extent not completed at the Execution Time, shall contain
    only such specific additional information and other changes (beyond that
    contained in the Basic Prospectus and any Preliminary Final Prospectus) as
    the Company has advised you, prior to the Execution Time, will be included
    or made therein.

         (ii) The Company meets the requirements for the use of Form S-3 under
    the Act and has filed with the Commission a registration statement (the file
    number of which is set forth in Schedule I hereto) on such Form, including a
    basic prospectus, for registration under the Act of the offering and sale of
    the Securities. The Company may have filed one or more amendments thereto,
    including a Preliminary Final Prospectus, each of which has previously been
    furnished to you. The Company will next file with the Commission either (x)
    a final prospectus supplement relating to the Securities in accordance with
    Rules 430A and 424(b)(1) or (4), or (y) prior to the effectiveness of such
    registration statement, an amendment to such registration statement,
    including the form of final prospectus supplement. In the case of clause
    (x), the Company has included in such registration statement, as amended at
    the Effective Date, all information (other than Rule 430A Information)
    required by the Act and the rules thereunder to be included in the Final
    Prospectus with respect to the Securities and the offering thereof. As
    filed, such final prospectus supplement or such amendment and form of final
    prospectus supplement shall contain all Rule 430A Information, together with
    all other such required information, with respect to the Securities and the
    offering thereof and, except to the extent the Representatives shall agree
    in writing to a modification, shall be in all substantive respects in the
    form furnished to you prior to the Execution Time or, to the extent not
    completed at the Execution Time, shall contain only such specific additional
    information and other changes (beyond that contained in the Basic Prospectus
    and any Preliminary Final Prospectus) as the Company has advised you, prior
    to the Execution Time, will be included or made therein.

     (b) On the Effective Date, the Registration Statement did or will, and when
the Final Prospectus is first filed (if required) in accordance with Rule 424(b)
and on the Closing Date, the Final Prospectus (and any supplement thereto) will,
comply in all material respects with the applicable requirements of the Act and
the Securities Exchange Act of 1934 (the "Exchange Act") and the respective
rules thereunder; on the Effective Date, the Registration Statement did not or
will not contain any untrue statement of a material fact or omit to state any
material fact required to be stated therein or necessary in order to make the
statements therein not misleading; and, on the Effective Date, the Final
Prospectus, if not filed pursuant to Rule 424(b), did not or will not, and on

                                       2
<PAGE>
 
the date of any filing pursuant to Rule 424(b) and on the Closing Date, the
Final Prospectus (together with any supplement thereto) will not, include any
untrue statement of a material fact or omit 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; provided, however, that the Company makes
                                      --------  -------
no representations or warranties as to the information contained in or omitted
from the Registration Statement or the Final Prospectus (or any supplement
thereto) in reliance upon and in conformity with information furnished in
writing to the Company by or on behalf of any Underwriter through the
Representatives specifically for inclusion in the Registration Statement or the
Final Prospectus (or any supplement thereto).

     (c) The terms which follow, when used in this Agreement, shall have the
meanings indicated.  The term "the Effective Date" shall mean each date that the
Registration Statement and any post-effective amendment or amendments thereto
became or become effective and each date after the date hereof on which a
document incorporated by reference in the Registration Statement is filed.
"Execution Time" shall mean the date and time that this Agreement is executed
and delivered by the parties hereto.  "Basic Prospectus" shall mean the
prospectus referred to in paragraph (a) above contained in the Registration
Statement at the Effective Date including, in the case of a Non-Delayed
Offering, any Preliminary Final Prospectus.  "Preliminary Final Prospectus"
shall mean any preliminary prospectus supplement to the Basic Prospectus which
describes the Securities and the offering thereof and is used prior to filing of
the Final Prospectus.  "Final Prospectus" shall mean the prospectus supplement
relating to the Securities that is first filed pursuant to Rule 424(b) after the
Execution Time, together with the Basic Prospectus or, if, in the case of a Non-
Delayed offering, no filing pursuant to Rule 424(b) is required, shall mean the
form of final prospectus relating to the Securities, including the Basic
Prospectus, included in the Registration Statement at the Effective Date.
"Registration Statement" shall mean the registration statement referred to in
paragraph (a) above, including incorporated documents, exhibits and financial
statements, as amended at the Execution Time (or, if not effective at the
Execution Time, in the form in which it shall become effective) and, in the
event any post-effective amendment thereto becomes effective prior to the
Closing Date (as hereinafter defined), shall also mean such registration
statement as so amended.  Such term shall include any Rule 430A Information
deemed to be included therein at the Effective Date as provided by Rule 430A.
"Rule 415", "Rule 424", "Rule 430A" and "Regulation S-K" refer to such rules or
regulation under the Act.  "Rule 430A Information" means information with
respect to the Securities and the offering thereof permitted to be omitted from
the Registration Statement when it becomes effective pursuant to Rule 430A.  Any
reference herein to the Registration Statement, the Basic Prospectus, any
Preliminary Final Prospectus or the Final Prospectus shall be deemed to refer to
and include the documents incorporated by reference therein pursuant to Item 12
of Form S-3 which were filed under the Exchange Act on or before the Effective
Date of the Registration Statement or the issue date of the Basic Prospectus,
any Preliminary Final Prospectus or the Final Prospectus, as the case may be;
and any reference herein to the terms "amend", "amendment" or "supplement" with
respect to the Registration Statement, the Basic Prospectus, any Preliminary
Final Prospectus or the Final Prospectus shall be deemed to refer to and include
the filing of any document under the Exchange Act after the Effective Date of
the Registration Statement or the issue date of the Basic Prospectus, any
Preliminary Final Prospectus or the Final Prospectus, as the case may be, deemed

                                       3
<PAGE>
 
to be incorporated therein by reference.  A "Non-Delayed Offering" shall mean an
offering of securities which is intended to commence promptly after the
effective date of a registration statement, with the result that, pursuant to
Rules 415 and 430A, all information (other than Rule 430A Information) with
respect to the securities so offered must be included in such registration
statement at the effective date thereof.  A "Delayed Offering" shall mean an
offering of securities pursuant to Rule 415 which does not commence promptly
after the effective date of a registration statement, with the result that only
information required pursuant to Rule 415 need be included in such registration
statement at the effective date thereof with respect to the securities so
offered.  Whether the offering of the Securities is a Non-Delayed Offering or a
Delayed Offering shall be set forth in Schedule I hereto.

     (d) Neither the Company nor Alabama Gas Corporation nor Taurus Exploration,
Inc. nor Taurus Exploration U.S.A., Inc. (individually a "Subsidiary" and
collectively the "Subsidiaries") is in violation of its charter or by-laws or in
default in the performance or observance of any material obligation, agreement,
covenant or condition contained in any contract, agreement or other instrument
to which it is a party or by which it may be bound, the effect of which is
material to the Company or either of the Subsidiaries, and neither the execution
or delivery of this Agreement, the consummation of the transactions herein
contemplated, the fulfillment of the terms hereof, nor compliance with the terms
and provisions hereof will conflict with, or result in a breach of, or
constitute a default under (i) the articles of incorporation, by-laws, or any
contract, agreement or other instrument to which the Company or any of the
Subsidiaries is a party or by which it may be bound or (ii) any law, order, rule
or regulation applicable to the Company or any of the Subsidiaries of any court
or any federal or state governmental body having jurisdiction over the Company
or any of the Subsidiaries or over their respective properties.

     (e) Neither the execution or delivery of this Agreement, the consummation
of the transactions herein contemplated, the fulfillment of the terms hereof,
nor compliance with the terms and provisions hereof requires any consent,
approval, authorization or order of any court or governmental agency or body,
except such as may as have been obtained under the Act and such as may be
required under the blue sky laws of any jurisdiction in connection with the sale
of the Securities as contemplated by this Agreement.

     (f) The Company has filed an annual exemption statement on Form U-3A-2
pursuant to Rule 2 under the Public Utility Holding Company Act of 1935 (the
"1935 Act"), and the Company is exempt from all of the provisions of the 1935
Act except Section 9(a)(2) thereof and has received no notice, request or
inquiry from the Commission terminating or threatening to terminate or
questioning such exemption.

     2.  Purchase and Sale.  (a) Subject to the terms and conditions and in
reliance upon the representations and warranties herein set forth, the Company
agrees to sell to each Underwriter, and

                                       4
<PAGE>
 
each Underwriter agrees, severally and not jointly, to purchase from the
Company, at the purchase price per share set forth in Schedule I hereto, the
amount of Underwritten Securities set forth opposite such Underwriter's name in
Schedule II hereto.

     (b) Subject to the terms and conditions and in reliance upon the
representations and warranties herein set forth, the Company hereby grants an
option to the several Underwriters to purchase, severally and not jointly, up to
the number of shares of Option Securities set forth in Schedule I hereto at the
purchase price per share set forth on Schedule I hereto. Said option may be
exercised only to cover over-allotments in the sale of the Underwritten
Securities by the Underwriters. Said option may be exercised in whole or in part
at any time (but not more than once) on or before the 30th day after the date of
this Agreement upon written or telegraphic notice by the Representatives to the
Company setting forth the number of shares of the Option Securities as to which
the several Underwriters are exercising the option and the settlement date.
Delivery of certificates for the shares of Option Securities, and payment
therefor, shall be made as provided in Section 3 hereof. The number of shares of
the Option Securities to be purchased by each Underwriter shall be the same
percentage of the total number of shares of the Option Securities to be
purchased by the several Underwriters as such Underwriter is purchasing of the
Underwritten Securities, subject to such adjustments as you in your absolute
discretion shall make to eliminate any fractional shares.

     3.  Delivery and Payment.  Delivery of and payment for the Underwritten
Securities and the Option Securities (if the option provided for in Section 2(b)
hereof shall have been exercised on or before the second business day prior to
the Closing Date) shall be made on the date and at the time specified in
Schedule I hereto (or such later date not later than five business days after
such specified date as the Representatives shall designate), which date and time
may be postponed by agreement between the Representatives and the Company or as
provided in Section 8 hereof (such date and time of delivery and payment for the
Securities being herein called the "Closing Date").  Delivery of the Securities
shall be made to the Representatives for the respective accounts of the several
Underwriters against payment by the several Underwriters through the
Representatives of the purchase price thereof to the Company by wire transfer in
immediately available funds to an account designated by the Company. Delivery of
the Underwritten Securities and the Option Securities shall be made at such
location as the Representatives shall reasonably designate at least one business
day in advance of the Closing Date and payment for the Securities shall be made
at the office specified in Schedule I hereto.  Certificates for the Securities
shall be registered in such names and in such denominations as the
Representatives may request not less than one full business day in advance of
the Closing Date.

     The Company agrees to have the Securities available for inspection,
checking and packaging by the Representatives in New York, New York, not later
than [    ] PM on the business day prior to the Closing Date.

     If the option provided for in Section 2(b) hereof is exercised after the
second business day prior to the Closing Date, the Company will deliver (at the
expense of the Company) to the Representatives, at [          ],
on the date specified by the Representatives (which shall be within

                                       5
<PAGE>
 
three business days after exercise of said option), certificates for the Option
Securities in such names and denominations as the Representatives shall have
requested against payment of the purchase price thereof (determined as specified
in paragraph 2(b) above) to the Company by wire transfer in immediately
available funds to an account designated by the Company. If settlement for the
Option Securities occurs after the Closing Date, the Company will deliver to the
Representatives on the settlement date for the Option Securities, and the
obligation of the Underwriters to purchase the Option Securities shall be
conditioned upon receipt of, supplemental opinions, certificates and letters
confirming as of such date the opinions, certificates and letters delivered on
the Closing Date pursuant to Section 5 hereof.

     4.  Agreements.  The Company agrees with the several Underwriters that:

     (a) The Company will use its best efforts to cause the Registration
Statement, if not effective at the Execution Time, and any amendment thereto, to
become effective. Prior to the termination of the offering of the Securities,
the Company will not file any amendment of the Registration Statement or
supplement (including the Final Prospectus or any Preliminary Final Prospectus)
to the Basic Prospectus unless the Company has furnished you a copy for your
review prior to filing and will not file any such proposed amendment or
supplement to which you reasonably object. Subject to the foregoing sentence,
the Company will cause the Final Prospectus, properly completed, and any
supplement thereto to be filed with the Commission pursuant to the applicable
paragraph of Rule 424(b) within the time period prescribed and will provide
evidence satisfactory to the Representatives of such timely filing. The Company
will promptly advise the Representatives (i) when the Registration Statement, if
not effective at the Execution Time, and any amendment thereto, shall have
become effective, (ii) when the Final Prospectus shall have been filed with the
Commission pursuant to Rule 424(b), (iii) when, prior to termination of the
offering of the Securities, any amendment to the Registration Statement shall
have been filed or become effective, (iv) of any request by the Commission for
any amendment of the Registration Statement or supplement to the Final
Prospectus or for any additional information, (v) of the issuance by the
Commission of any stop order suspending the effectiveness of the Registration
Statement or the institution or threatening of any proceeding for that purpose
and (vi) of the receipt by the Company of any notification with respect to the
suspension of the qualification of the Securities for sale in any jurisdiction
or the initiation or threatening of any proceeding for such purpose. The Company
will use its best efforts to prevent the issuance of any such stop order and, if
issued, to obtain as soon as possible the withdrawal thereof.

     (b) If, at any time when a prospectus relating to the Securities is
required to be delivered under the Act, any event occurs as a result of
which the Final Prospectus as then supplemented would include any untrue
statement of a material fact or omit to state any material fact necessary to
make the statements therein in the light of the circumstances under which
they were made not misleading, or if it shall be necessary to amend the
Registration Statement or supplement the Final Prospectus to comply with the
Act or the Exchange Act or the respective rules thereunder, the Company
promptly will (i) prepare and file with the Commission, subject to the
second sentence of paragraph (a) of this Section 4, an amendment or
supplement which will correct such statement or omission or effect such

                                       6
<PAGE>
 
compliance and (ii) supply any supplemented Prospectus to you in such
quantities as you may reasonably request.

     (c) As soon as practicable, the Company will make generally available
to its security holders and to the Representatives an earnings statement or
statements of the Company and its subsidiaries which will satisfy the
provisions of Section 11(a) of the Act and Rule 158 under the Act.

    (d) The Company will furnish to the Representatives and counsel for the
Underwriters, without charge, copies of the Registration Statement (including
exhibits thereto) and, so long as delivery of a prospectus by an Underwriter or
dealer may be required by the Act, as many copies of any Preliminary Final
Prospectus and the Final Prospectus and any supplement thereto as the
Representatives may reasonably request.  The Company will pay the expenses of
printing or other production of all documents relating to the offering.

     (e) The Company will arrange for the qualification of the Securities for
sale under the laws of such jurisdictions as the Representatives may designate,
will maintain such qualifications in effect so long as required for the
distribution of the Securities and will pay the fee of the National Association
of Securities Dealers, Inc., in connection with its review of the offering;
provided that in no event shall the Company be obligated to qualify to do
business in any jurisdiction where it is not now so qualified or to take any
action which would subject it to service of process in suits, other than those
arising out of the offering or sale of the Securities, in any jurisdiction where
it is not now so subject.

     (f) Until the date set forth on Schedule I hereto, the Company will not,
without the prior written consent of the Representatives, offer, sell or
contract to sell, or otherwise dispose of, directly or indirectly, or announce
the offering of, any other shares of Common Stock or any securities convertible
into, or exchangeable for, shares of Common Stock; provided, however, that the
                                                   --------  -------
Company may issue and sell Common Stock pursuant to any director or employee
stock option, stock bonus or incentive plan, stock ownership plan, any Company
sponsored retirement or similar plan, any dividend reinvestment or direct stock
purchase plan or any other similar plan of the Company in effect at the
Execution Time and the Company may issue Common Stock issuable upon the
conversion of securities or the exercise of warrants outstanding at the
Execution Time.

     (g) The Company confirms as of the date hereof that it is in compliance
with all provisions of Section 1 of Laws of Florida, Chapter 92-198, An Act
                                                                     ------
Relating to Disclosure of Doing Business with Cuba, and the Company further
- --------------------------------------------------
agrees that if it commences engaging in business with the government of Cuba or
with any person or affiliate located in Cuba after the date the Registration
Statement becomes or has become effective with the Securities and Exchange
Commission or with the Florida Department of Banking and Finance (the
"Department"), whichever date is later, or if the information reported in the
Prospectus, if any, concerning the Company's business with Cuba or with any
person or affiliate located in Cuba changes in any material way, the Company

                                       7
<PAGE>
 
will provide the Department notice of such business or change, as appropriate,
in a form acceptable to the Department.

     5.  Conditions to the Obligations of the Underwriters.  The obligations of
the Underwriters to purchase the Underwritten Securities and the Option
Securities, as the case may be, shall be subject to the accuracy of the
representations and warranties on the part of the Company contained herein as of
the Execution Time and the Closing Date and any settlement date pursuant to
Section 3 hereof, to the accuracy of the statements of the Company made in any
certificates pursuant to the provisions hereof, to the performance by the
Company of its obligations hereunder and to the following additional conditions:

     (a) If the Registration Statement has not become effective prior to the
Execution Time, unless the Representatives agree in writing to a later time, the
Registration Statement will become effective not later than (i) 6:00 PM New York
City time, on the date of determination of the public offering price, if such
determination occurred at or prior to [   ] PM New York City time on such date 
or (ii) [     ] Noon on the business day following the day on which the public
offering price was determined, if such determination occurred after [   ] PM New
York City time on such date; if filing of the Final Prospectus, or any
supplement thereto, is required pursuant to Rule 424(b), the Final Prospectus,
and any such supplement, shall have been filed in the manner and within the time
period required by Rule 424(b); and no stop order suspending the effectiveness
of the Registration Statement shall have been issued and no proceedings for that
purpose shall have been instituted or threatened.

     (b) The Company shall have furnished to the Representatives the opinion of
Bradley Arant Rose & White LLP, counsel for the Company, dated the Closing Date,
to the effect that:

         (i) the Company has been duly incorporated and is validly existing as a
     corporation in good standing under the laws of the State of Alabama, with
     full corporate power and authority to own its properties and conduct its
     business as described in the Final Prospectus, and is duly qualified to do
     business as a foreign corporation and is in good standing under the laws of
     each jurisdiction which requires such qualification wherein it owns or
     leases material property or conducts material business and wherein the
     failure to be so qualified would have a material adverse effect on the
     business of the Company and its subsidiaries taken as a whole;

         (ii) each of Alabama Gas Corporation, Taurus Exploration, Inc. and
     Taurus Exploration U.S. A., Inc. (individually, a "Subsidiary" and
     collectively, the "Subsidiaries") has been duly organized and is validly
     existing as a corporation in good standing under the laws of the
     jurisdiction of its organization, with full corporate power and authority
     to own, lease and operate its properties and conduct its business as
     described in the Final Prospectus, and Alabama Gas Corporation is duly
     qualified to do business as a foreign corporation and is in good standing
     under the laws of each jurisdiction which requires such qualification

                                       8
<PAGE>
 
     wherein it owns or leases material property or conducts material business
     and wherein the failure to be so qualified would have a material adverse
     effect on the business of the Company and its subsidiaries taken as a
     whole;

         (iii) all of the outstanding shares of capital stock of each Subsidiary
     have been duly and validly authorized and issued and are fully paid and
     nonassessable, and, except as otherwise set forth in the Final Prospectus,
     all of the outstanding shares of capital stock of the Subsidiaries are
     owned by the Company either directly or through wholly owned subsidiaries
     free and clear of any perfected security interest and, to the knowledge of
     such counsel, any other security interests, claims, liens or encumbrances
     (with the exception of those encumbrances in the Indenture dated as of
     ___________, 1998 between the Company and The Bank of New York, as
     trustee);

         (iv) the Company's authorized equity capitalization is as set forth in
     the Final Prospectus; the capital stock of the Company conforms to the
     description thereof contained in the Final Prospectus; the outstanding
     shares of Common Stock have been duly and validly authorized and issued and
     are fully paid and nonassessable; the Securities have been duly and validly
     authorized, and, when issued and delivered to and paid for by the
     Underwriters pursuant to this Agreement, will be fully paid and
     nonassessable; the Securities are duly authorized for listing, subject to
     official notice of issuance, on the New York Stock Exchange; the
     certificates for the Securities conform to the requirements of Alabama law;
     and the holders of outstanding shares of capital stock of the Company are
     not entitled to preemptive or, to the knowledge of counsel, similar rights
     to subscribe for the shares of Common Stock;

         (v) to the knowledge of such counsel, there is no pending or threatened
     action, suit or proceeding before any court or governmental agency,
     authority or body or any arbitrator involving the Company or any of its
     subsidiaries, of a character required to be disclosed in the Registration
     Statement which is not adequately disclosed in the Final Prospectus, and
     there is no franchise, contract or other document of a character required
     to be described in the Registration Statement or Final Prospectus, or to be
     filed as an exhibit, which is not described or filed as required; and the
     statements included or incorporated in the Final Prospectus describing any
     material contracts or agreements relating to the Company fairly summarize
     such matters;

         (vi) the Registration Statement has become effective under the Act; any
     required filing of the Basic Prospectus, any Preliminary Final Prospectus
     and the Final Prospectus, and any supplements thereto, pursuant to Rule
     424(b) has been made in the manner and within the time period required by
     Rule 424(b); to the knowledge of such counsel, no stop order suspending the
     effectiveness of the Registration Statement has been issued, no proceedings
     for that purpose have been instituted or threatened, and the Registration
     Statement and the Final Prospectus (other than the financial statements and
     other financial and statistical information contained therein as to which

                                       9
<PAGE>
 
     such counsel need express no opinion) comply as to form in all material
     respects with the applicable requirements of the Act and the Exchange Act
     and the respective rules thereunder; and such counsel has no reason to
     believe that at the Effective Date the Registration Statement 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 Final Prospectus includes any untrue statement
     of a material fact or omits to state a material fact necessary to make the
     statements therein, in the light of the circumstances under which they were
     made, not misleading;

         (vii) this Agreement has been duly authorized, executed and delivered
     by the Company;

         (viii) no consent, approval, authorization or order of any court or
     governmental agency or body is required for the consummation of the
     transactions contemplated herein, except such as have been obtained under
     the Act and such as may be required under the blue sky laws of any
     jurisdiction in connection with the purchase and distribution of the
     Securities by the Underwriters and such other approvals (specified in such
     opinion) as have been obtained;

         (ix) neither the issue and sale of the Securities, nor the consummation
     of any other of the transactions herein contemplated nor the fulfillment of
     the terms hereof will conflict with, result in a breach or violation of, or
     constitute a default under any law or the charter or by-laws of the Company
     or the terms of any indenture or other agreement or instrument known to
     such counsel and to which the Company or the Subsidiaries is a party or
     bound or any judgment, order, regulation or decree known to such counsel to
     be applicable to the Company or any of the Subsidiaries of any court,
     regulatory body, administrative agency, governmental body or arbitrator
     having jurisdiction over the Company or any of the Subsidiaries;

         (x) to the knowledge of such counsel, no holders of securities of the
     Company have rights to the registration of such securities under the
     Registration Statement; and

         (xi) the Company is exempt from all provisions of the 1935 Act except
     Section 9(a)(2) thereof.

     In rendering such opinion, such counsel may rely (A) as to matters
involving the application of laws of any jurisdiction other than the State of
Alabama or the United States, to the extent deemed proper and specified in such
opinion, upon the opinion of other counsel of good standing believed to be
reliable and who are satisfactory to counsel for the Underwriters and (B) as to
matters of fact, to the extent deemed proper, on certificates of responsible
officers of the Company and public officials.  References to the Final

                                       10
<PAGE>
 
Prospectus in this paragraph (b) include any supplements thereto at the Closing
Date.

     (c) The Representatives shall have received from Winthrop, Stimson, Putnam
& Roberts, counsel for the Underwriters, such opinion or opinions, dated the
Closing Date, with respect to the issuance and sale of the Securities, the
Registration Statement, the Final Prospectus (together with any supplement
thereto) and other related matters as the Representatives may reasonably
require, and the Company shall have furnished to such counsel such documents as
they request for the purpose of enabling them to pass upon such matters.

     (d) The Company shall have furnished to the Representatives a certificate
of the Company, signed by the Chairman of the Board or the President and the
principal financial or accounting officer of the Company, dated the Closing
Date, to the effect that the signers of such certificate have carefully examined
the Registration Statement, the Final Prospectus, any supplement to the Final
Prospectus and this Agreement and that:

         (i) the representations and warranties of the Company in this Agreement
     are true and correct in all material respects on and as of the Closing Date
     with the same effect as if made on 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
     instituted or, to the Company's knowledge, threatened; and

         (iii) since the date of the most recent financial statements included
     in the Final Prospectus (exclusive of any supplement thereto), there has
     been no material adverse change in the condition (financial or other),
     earnings, business or properties of the Company and its subsidiaries,
     whether or not arising from transactions in the ordinary course of
     business, except as set forth in or contemplated in the Final Prospectus
     (exclusive of any supplement thereto).

     (e) At the Closing Date, Coopers & Lybrand shall have furnished to the
Representatives a letter or letters (which may refer to letters previously
delivered to one or more of the Representatives), dated as of the Closing Date,
in form and substance satisfactory to the Representatives, confirming that they
are independent accountants within the meaning of the Act and the Exchange Act
and the respective applicable published rules and regulations thereunder and
stating in effect that:

         (i) in their opinion the audited financial statements and financial
     statement schedules and pro forma financial statements, if any, included or
     incorporated by reference in the Registration Statement and the Final
     Prospectus and reported on by them comply as to form in all material

                                       11
<PAGE>
 
     respects with the applicable accounting requirements of the Act and the
     Exchange Act and the related published rules and regulations; 

         (ii) on the basis of a reading of the latest unaudited financial
     statements made available by the Company and its subsidiaries; the
     performance of the procedures specified by the American Institute of
     Certified Public Accountants for a review of interim financial information
     as described in SAS No. 71, Interim Financial Information, on the latest
                                 -----------------------------
     unaudited financial statements, if any, included or incorporated by
     reference in the Prospectus; a reading of the minutes of the meetings of
     the stockholders, directors, audit and finance committees of the Company
     and its subsidiaries; and inquiries of certain officials of the Company who
     have responsibility for financial and accounting matters of the Company and
     its subsidiaries as to transactions and events subsequent to the date of
     the most recent audited financial statements included or incorporated in
     the Prospectus (it being understood that the foregoing procedures do not
     constitute an examination made in accordance with generally accepted
     auditing standards and they would not necessarily reveal matters of
     significance with respect to the comments made in such letter), nothing
     came to their attention which caused them to believe that:

              (1) any unaudited financial statements included or incorporated by
         reference in the Registration Statement and the Prospectus do not
         comply as to form in all material respects with the applicable
         accounting requirements of the Exchange Act and the related published
         rules and regulations thereunder; and that any material modifications
         should be made to said unaudited financial statements for them to be in
         conformity with generally accepted accounting principles;

              (2) with respect to the period subsequent to the date of the most
         recent financial statements (other than any capsule information),
         audited or unaudited, included or incorporated in the Registration
         Statement and the Final Prospectus, there were any changes, at a
         specified date not more than five business days prior to the date of
         the letter, in the common stock, preferred stock, current liabilities
         or long-term debt of the Company and its subsidiaries or decreases in
         the total common stockholders' equity of the Company as compared with
         the amounts shown on the most recent consolidated balance sheet
         included or incorporated in the Registration Statement and the Final
         Prospectus, or for the period from the date of the most recent
         financial statements included or incorporated in the Registration
         Statement and the Final Prospectus to such specified date there were
         any decreases, as compared with the corresponding period in the
         preceding year in operating revenues, operating income, other income or
         net income of the Company and its subsidiaries except in all instances
         for changes or decreases set forth in such letter, in which case the
         letter shall be accompanied by an explanation by the Company as to the
         significance thereof unless said explanation is not deemed necessary by
         the Representatives; or

                                       12
<PAGE>
 
              (3) the amounts included in any unaudited "capsule" information
         included or incorporated in the Registration Statement and the Final
         Prospectus do not agree with the amounts set forth in the unaudited
         financial statements for the same periods or were not determined on a
         basis substantially consistent with that of the corresponding amounts
         in the audited financial statements included or incorporated in the
         Registration Statement and the Final Prospectus; and

         (iii) they have performed certain other specified procedures as a
     result of which they determined that certain information of an accounting,
     financial or statistical nature (which is limited to accounting, financial
     or statistical information derived from the general accounting records of
     the Company and its subsidiaries) set forth in the Registration Statement
     and the Final Prospectus and in Exhibit 12 to the Registration Statement,
     including the information included or incorporated in Items 1, 2, 6, 7 and
     11 of the Company's Annual Report on Form 10-K, incorporated in the
     Registration Statement and the Final Prospectus, and the information
     included in the "Management's Discussion and Analysis of Financial
     Condition and Results of Operations" included or incorporated in the
     Company's Quarterly Reports on Form 10-Q, incorporated in the Registration
     Statement and the Final Prospectus, agrees with the accounting records of
     the Company and its subsidiaries, excluding any questions of legal
     interpretation.

     References to the Final Prospectus in this paragraph (e) include any
supplement thereto at the date of the letter.

     In addition, except as provided in Schedule I hereto, at the Execution
Time, Coopers & Lybrand shall have furnished to the Representatives a letter or
letters, dated as of the Execution Time, in form and substance satisfactory to
the Representatives, to the effect set forth above.

     (f) Subsequent to the Execution Time or, if earlier, the dates as of which
information is given in the Registration Statement (exclusive of any amendment
thereof) and the Final Prospectus (exclusive of any supplement thereto), there
shall not have been (i) any change or decrease specified in the letter or
letters referred to in paragraph (e) of this Section 5 or (ii) any change, or
any development involving a prospective change, in or affecting the business or
properties of the Company and its subsidiaries the effect of which, in any case
referred to in clause (i) or (ii) above, is, in the judgment of the

                                       13
<PAGE>
 
Representatives, so material and adverse as to make it impractical or
inadvisable to proceed with the offering or delivery of the Securities as
contemplated by the Registration Statement (exclusive of any amendment thereof)
and the Final Prospectus (exclusive of any supplement thereto).

     (g) Prior to the Closing Date, the Company shall have furnished to the
Representatives such further information, certificates and documents as the
Representatives may reasonably request.

     If any of the conditions specified in this Section 5 shall not have been
fulfilled in all material respects when and as provided in this Agreement, or if
any of the opinions and certificates mentioned above or elsewhere in this
Agreement shall not be in all material respects reasonably satisfactory in form
and substance to the Representatives and counsel for the Underwriters, this
Agreement and all obligations of the Underwriters hereunder may be canceled at,
or at any time prior to, the Closing Date by the Representatives.  Notice of
such cancellation shall be given to the Company in writing or by telephone or
telegraph confirmed in writing.

     The documents required to be delivered by this Section 5 shall be delivered
at the office of Winthrop, Stimson, Putnam & Roberts, counsel for the
Underwriters, at One Battery Park Plaza, New York, New York, on the Closing
Date.

     6.  Reimbursement of Underwriters' Expenses.  If the sale of the Securities
provided for herein is not consummated because any condition to the obligations
of the Underwriters set forth in Section 5 hereof is not satisfied, because of
any termination pursuant to Section 9(i) hereof or because of any refusal,
inability or failure on the part of the Company to perform any agreement herein
or comply with any provision hereof other than by reason of a default by any of
the Underwriters, the Company will reimburse the Underwriters severally upon
demand for all out-of-pocket expenses (including reasonable fees and
disbursements of counsel) that shall have been incurred by them in connection
with the proposed purchase and sale of the Securities.

     7.  Indemnification and Contribution.  (a)  The Company agrees to indemnify
and hold harmless each Underwriter, the directors, officers, employees and
agents of each Underwriter and each person who controls any Underwriter within
the meaning of either the Act or the Exchange Act against any and all losses,
claims, damages or liabilities, joint or several, to which they or any of them
may become subject under the Act, the Exchange Act or other Federal or state
statutory law or regulation, at common law or otherwise, insofar as such losses,
claims, damages or liabilities (or actions in respect thereof) arise out of or
are based upon any untrue statement or alleged untrue statement of a material
fact contained in the registration statement for the registration of the
Securities as originally filed or in any amendment thereof, or in the Basic
Prospectus, any Preliminary Final Prospectus or the Final Prospectus, or in any
amendment thereof or supplement thereto, or arise out of or are based upon the
omission or alleged omission to state therein a material fact required to be
stated therein or necessary to make the statements therein not misleading, and
agrees to reimburse each such indemnified party, as incurred, for any legal or
other expenses reasonably incurred by them in connection with investigating or
defending any such loss, claim, damage, liability or action; provided, however,
                                                             --------  -------
that the Company will not be liable in any such case to the extent that any such

                                       14
<PAGE>
 
loss, claim, damage or liability arises out of or is based upon any such untrue
statement or alleged untrue statement or omission or alleged omission made
therein in reliance upon and in conformity with written information furnished to
the Company by or on behalf of any Underwriter through the Representatives
specifically for inclusion therein. This indemnity agreement will be in addition
to any liability which the Company may otherwise have.

     (b) Each Underwriter severally agrees to indemnify and hold harmless the
Company, each of its directors, each of its officers who signs the Registration
Statement, and each person who controls the Company within the meaning of either
the Act or the Exchange Act, to the same extent as the foregoing indemnity from
the Company to each Underwriter, but only with reference to written information
relating to such Underwriter furnished to the Company by or on behalf of such
Underwriter through the Representatives specifically for inclusion in the
documents referred to in the foregoing indemnity.  This indemnity agreement will
be in addition to any liability which any Underwriter may otherwise have.  The
Company acknowledges that the statements set forth in the last paragraph of the
cover page and under the heading "Underwriting" or "Plan of Distribution" in any
Preliminary Final Prospectus or the Final Prospectus constitute the only
information furnished in writing by or on behalf of the several Underwriters for
inclusion in the documents referred to in the foregoing indemnity, and you, as
the Representatives, confirm that such statements are correct.

     (c) Promptly after receipt by an indemnified party under this Section 7 of
notice of the commencement of any action, such indemnified party will, if a
claim in respect thereof is to be made against the indemnifying party under this
Section 7, notify the indemnifying party in writing of the commencement thereof;
but the failure so to notify the indemnifying party (i) will not relieve it from
liability under paragraph (a) or (b) above unless and to the extent it did not
otherwise learn of such action and such failure results in the forfeiture by the
indemnifying party of substantial rights and defenses and (ii) will not, in any
event, relieve the indemnifying party from any obligations to any indemnified
party other than the indemnification obligation provided in paragraph (a) or (b)
above.  The indemnifying party shall be entitled to appoint counsel of the
indemnifying party's choice at the indemnifying party's expense to represent the
indemnified party in any action for which indemnification is sought (in which
case the indemnifying party shall not thereafter be responsible for the fees and
expenses of any separate counsel retained by the indemnified party or parties
except as set forth below); provided, however, that such counsel shall be
                            --------  -------
satisfactory to the indemnified party.  Notwithstanding the indemnifying party's
election to appoint counsel to represent the indemnified party in an action, the
indemnified party shall have the right to employ separate counsel (including
local counsel), and the indemnifying party shall bear the reasonable fees, costs
and expenses of such separate counsel if (i) the use of counsel chosen by the
indemnifying party to represent the indemnified party would present such counsel
with a conflict of interest, (ii) the actual or potential defendants in, or
targets of, any such action include both the indemnified party and the
indemnifying party and the indemnified party shall have reasonably concluded
that there may be legal defenses available to it and/or other indemnified
parties which are different from or additional to those available to the
indemnifying party, (iii) the indemnifying party shall not have employed counsel
satisfactory to the indemnified party to represent the indemnified party within
a reasonable time after notice of the institution of such action or (iv) the
indemnifying party shall authorize the indemnified party to employ separate

                                       15
<PAGE>
 
counsel at the expense of the indemnifying party.  It is understood, however,
that the Company shall, in connection with any one such action, suit or
proceeding or separate but substantially similar or related actions, suits or
proceedings in the same jurisdiction arising out of the same general allegations
or circumstances, be liable for the reasonable fees and expenses of only one
separate firm of attorneys (in addition to any local counsel) at any time for
all such indemnified parties, which firm shall be designated in writing by
[                  ], and that all such fees and expenses shall be reimbursed as
they are incurred.  An indemnifying party will not, without the prior written
consent of the indemnified parties, which consent shall not be unreasonably
withheld, settle or compromise or consent to the entry of any judgment with
respect to any pending or threatened claim, action, suit or proceeding in
respect of which indemnification or contribution may be sought hereunder
(whether or not the indemnified parties are actual or potential parties to such
claim or action) unless such settlement, compromise or consent includes an
unconditional release of each indemnified party from all liability arising out
of such claim, action, suit or proceeding. The Company shall not be liable for
any settlement of any such action, suit or proceeding effected without its
written consent, but if settled with such written consent, or if there be a
final judgment for the plaintiff in any such action, suit or proceeding, the
Company agrees to indemnify and hold harmless any indemnified party, but only to
the extent provided in paragraph (a) of this Section 7, from and against any
loss, claim, damage, liability or expense by reason of such settlement or
judgment.

     (d) In the event that the indemnity provided in paragraph (a) or (b) of
this Section 7 is unavailable to or insufficient to hold harmless an indemnified
party for any reason, the Company and the Underwriters agree to contribute to
the aggregate losses, claims, damages and liabilities (including legal or other
expenses reasonably incurred in connection with investigating or defending same)
(collectively "Losses") to which the Company and one or more of the Underwriters
may be subject in such proportion as is appropriate to reflect the relative
benefits received by the Company and by the Underwriters from the offering of
the Securities; provided, however, that in no case shall any Underwriter (except
                --------  -------
as may be provided in any agreement among underwriters relating to the offering
of the Securities) be responsible for any amount in excess of the underwriting
discount or commission applicable to the Securities purchased by such
Underwriter hereunder.  If the allocation provided by the immediately preceding
sentence is unavailable for any reason, the Company and the Underwriters shall
contribute in such proportion as is appropriate to reflect not only such
relative benefits but also the relative fault of the Company and of the
Underwriters in connection with the statements or omissions which resulted in
such Losses as well as any other relevant equitable considerations.  Benefits
received by the Company shall be deemed to be equal to the total net proceeds
from the offering (before deducting expenses), and benefits received by the
Underwriters shall be deemed to be equal to the total underwriting discounts and
commissions, in each case as set forth on the cover page of the Final
Prospectus.  Relative fault shall be determined by reference to whether any
alleged untrue statement or omission relates to information provided by the
Company or the Underwriters.  The Company and the Underwriters agree that it
would not be just and equitable if contribution were determined by pro rata
allocation or any other method of allocation which does not take account of the
equitable considerations referred to above.  Notwithstanding the provisions of
this paragraph (d), no person guilty of fraudulent misrepresentation (within the
meaning of Section 11(f) of the Act) shall be entitled to contribution from any
person who was not guilty of such fraudulent misrepresentation.  For purposes of
this Section 7, each person who controls an Underwriter within the meaning of

                                       16
<PAGE>
 
either the Act or the Exchange Act and each director, officer, employee and
agent of an Underwriter shall have the same rights to contribution as such
Underwriter, and each person who controls the Company within the meaning of
either the Act or the Exchange Act, each officer of the Company who shall have
signed the Registration Statement and each director of the Company shall have
the same rights to contribution as the Company, subject in each case to the
applicable terms and conditions of this paragraph (d).

     8.  Default by an Underwriter.  If any one or more Underwriters shall fail
to purchase and pay for any of the Securities agreed to be purchased by such
Underwriter or Underwriters hereunder and such failure to purchase shall
constitute a default in the performance of its or their obligations under this
Agreement, the remaining Underwriters shall be obligated severally to take up
and pay for (in the respective proportions which the amount of Securities set
forth opposite their names in Schedule II hereto bears to the aggregate amount
of Securities set forth opposite the names of all the remaining Underwriters)
the Securities which the defaulting Underwriter or Underwriters agreed but
failed to purchase; provided, however, that in the event that the aggregate
                    --------  -------
amount of Securities which the defaulting Underwriter or Underwriters agreed but
failed to purchase shall exceed 10% of the aggregate amount of Securities set
forth in Schedule II hereto, the remaining Underwriters shall have the right to
purchase all, but shall not be under any obligation to purchase any, of the
Securities, and if such nondefaulting Underwriters do not purchase all the
Securities, this Agreement will terminate without liability to any nondefaulting
Underwriter or the Company.  In the event of a default by any Underwriter as set
forth in this Section 8, the Closing Date shall be postponed for such period,
not exceeding seven days, as the Representatives shall determine in order that
the required changes in the Registration Statement and the Final Prospectus or
in any other documents or arrangements may be effected.  Nothing contained in
this Agreement shall relieve any defaulting Underwriter of its liability, if
any, to the Company and any nondefaulting Underwriter for damages occasioned by
its default hereunder.

     9.  Termination.  This Agreement shall be subject to termination in the
absolute discretion of the Representatives, by notice given to the Company prior
to delivery of and payment for the Securities, if prior to such time (i) trading
in the Company's Common Stock shall have been suspended by the Commission or the
New York Stock Exchange, (ii) trading in securities generally on the New York
Stock Exchange shall have been suspended or limited or minimum prices shall have
been established on such Exchange, (iii) a banking moratorium shall have been
declared either by Federal or New York State authorities or (iv) there shall
have occurred any outbreak or escalation of hostilities, declaration by the
United States of a national emergency or war or other calamity or crisis the
effect of which on financial markets is such as to make it, in the judgment of
the Representatives, impracticable or inadvisable to proceed with the offering
or delivery of the Securities as contemplated by the Final Prospectus (exclusive
of any supplement thereto).

     10.  Representations and Indemnities to Survive.  The respective
agreements, representations, warranties, indemnities and other statements of the
Company or its officers and of the Underwriters set forth in or made pursuant to
this Agreement will remain in full force and effect, regardless of any
investigation made by or on behalf of any Underwriter or the Company or any of

                                       17
<PAGE>
 
the officers, directors or controlling persons referred to in Section 7 hereof,
and will survive delivery of and payment for the Securities.  The provisions of
Sections 6 and 7 hereof shall survive the termination or cancellation of this
Agreement.

     11.  Notices.  All communications hereunder will be in writing and
effective only on receipt, and, if sent to the Representatives, will be mailed,
delivered or telegraphed and confirmed to them, at the address specified in
Schedule I hereto; or, if sent to the Company, will be mailed, delivered or
telegraphed and confirmed to it at Energen Corporation, 2101 Sixth Avenue North,
Birmingham, Alabama 35203, Attention: Treasurer.

     12.  Successors.  This Agreement will inure to the benefit of and be
binding upon the parties hereto and their respective successors and the officers
and directors and controlling persons referred to in Section 7 hereof, and no
other person will have any right or obligation hereunder.

     13.  Applicable Law.  This Agreement will be governed by and construed in
accordance with the laws of the State of New York.

     14.  Counterparts.  This Agreement may be simultaneously executed in
counterparts, each of which when so executed shall be deemed to be an original.
Such counterparts shall together constitute one and the same instrument.

                                       18
<PAGE>
 
     If the foregoing is in accordance with your understanding of our agreement,
please sign and return to us the enclosed duplicate hereof, whereupon this
letter and your acceptance shall represent a binding agreement among the Company
and the several Underwriters.

                                       Very truly yours,               
                                                                       
                                       Energen Corporation             
                                                                       
                                                                       
                                       By:___________________________  
                                           Name:                           
                                           Title:                           
  
The foregoing Agreement is
hereby confirmed and accepted
as of the date specified in
Schedule I hereto.

[Names of Representatives]

By:  [Lead Representative]


By: _________________________
     Name:
     Title:

For themselves and the other
several Underwriters, if any,
named in Schedule II to the
foregoing Agreement.

     or

[Lead Representative]


By:_________________________
    Name:
    Title:


For itself and the other several
Underwriters, if any, named in
Schedule II to the foregoing
Agreement.

                                       19
<PAGE>
 
                                  SCHEDULE I



Underwriting Agreement dated ___________, 199_

Registration Statement No. 33-_____

Representative(s):
                     [Representative(s)]

Amount and Purchase Price of Securities:

     Number of Underwritten Securities:            _________

     Number of Option Securities:                  _________
     Purchase price per share:                  $      _____


Closing Date, Time and Location:

     [                  ]

Type of Offering:  [Delayed Offering or Non-Delayed Offering]


Date referred to in Section 4(f) after which the Company may offer or sell
additional Common Stock or securities convertible into, or exchangeable for,
shares of Common Stock without the consent of the Representative(s):

     ___________, 199_

Modification of items to be covered by the letter from [                ]
delivered pursuant to Section 5(e) at the Execution Time:   ______

                                       20
<PAGE>
 
                                  SCHEDULE II



                                                     Number of Shares
                Underwriters                         to be Purchased
                ------------                         ----------------

                [Underwriter]                            ________
                [Underwriter]                            ________

                   Total                                [        ]
                                                         ========

                                       21

<PAGE>
 
                                                                   EXHIBIT 4(i) 
================================================================================







                              ENERGEN CORPORATION

                                      TO

                             THE BANK OF NEW YORK
                                  as Trustee

                                    ______

                                   INDENTURE


                         Dated as of September 1, 1996

                                    ______







================================================================================
<PAGE>
 
                              ENERGEN CORPORATION

           Reconciliation and tie between Trust Indenture Act of 1939
                 and Indenture, dated as of September 1, 1996

<TABLE> 
<CAPTION> 
 Trust Indenture Act Section              Indenture Section
 
<S>                                               <C>
    (S) 310(a)(1)       ....................      909
           (a)(2)       ....................      909
           (a)(3)       ....................      Not Applicable
           (a)(4)       ....................      Not Applicable
           (a)(5)       ....................      909
           (b)          ....................      908
           (c)          ....................      Not Applicable
    (S) 311(a)          ....................      913(c)
           (b)          ....................      913(b)
           (b)(2)       ....................      1003(a)(2)
                        ....................      1003(b)
           (c)          ....................      Not Applicable
    (S) 312(a)          ....................      1001
                        ....................      1002(a)
           (b)          ....................      1002(b)
           (c)          ....................      1002(c)
    (S) 313(a)          ....................      1003(a)
           (b)          ....................      1003(b)
           (c)          ....................      1003(c)
           (c)(2)       ....................      Not Applicable
           (d)          ....................      1003(d)
    (S) 314(a)(4)       ....................      606
           (b)          ....................      Not Applicable
           (c)(1)       ....................      102
           (c)(2)       ....................      102
           (c)(3)       ....................      Not Applicable
           (d)          ....................      1003
           (e)          ....................      102
    (S) 315(a)          ....................      901(a)
           (b)          ....................      902
                        ....................      1003(a)(6)
           (c)          ....................      901(b)
           (d)          ....................      901(c)
           (d)(1)       ....................      901(a)(1)
           (d)(2)       ....................      901(c)(2)
           (d)(3)       ....................      901(c)(3)
           (e)          ....................      814
    (S) 316(a) last sentence................      101
           (a)(1)(A)    ....................      812
           (a)(1)(B)    ....................      813
           (a)(2)       ....................      Not Applicable
           (b)          ....................      808
    (S) 317(a)(1)       ....................      803
           (a)(2)       ....................      804
           (b)          ....................      603
    (S) 318(a)          ....................      607
</TABLE>

<PAGE>
 
                               TABLE OF CONTENTS


                                                                    Page
                                                                    ----
<TABLE> 
<CAPTION>                                                    

                                  ARTICLE ONE

            Definitions and Other Provisions of General Application
 
<C>           <S>                                                    <C>  
Section 101.  Definitions...........................................   1 
Section 102.  Compliance Certificates and Opinion...................   8 
Section 103.  Form of Documents Delivered to Trustee................   9 
Section 104.  Acts of Holders.......................................  10 
Section 105.  Notices, Etc. to Trustee and Company..................  11 
Section 106.  Notice to Holders of Securities; Waiver...............  12 
Section 107.  Conflict with Trust Indenture Act.....................  12 
Section 108.  Effect of Headings and Table of Contents..............  12 
Section 109.  Successors and Assigns................................  13 
Section 110.  Separability Clause...................................  13 
Section 111.  Benefits of Indenture.................................  13 
Section 112.  Governing Law.........................................  13 
Section 113.  Legal Holidays........................................  13 
<CAPTION>                                                                
                                  ARTICLE TWO                            
                                                                         
                                 Security Forms                          
<C>           <S>                                                     <C> 
Section 201.  Forms Generally.......................................  14 
Section 202.  Form of Trustee's Certificate of                           
              Authentication........................................  14 
                                                                         
<CAPTION>                                                                
                                 ARTICLE THREE                           
                                                                         
                                 The Securities                          
                                                                         
<C>           <S>                                                     <C> 
Section 301.  Amount Unlimited; Issuable in Series..................  15 
Section 302.  Denominations.........................................  18 
Section 303.  Execution, Authentication, Delivery and                    
              Dating................................................  18 
Section 304.  Temporary Securities..................................  21 
Section 305.  Registration, Registration of Transfer and                 
              Exchange..............................................  22 
Section 306.  Mutilated, Destroyed, Lost and Stolen                      
              Securities............................................  23 
Section 307.  Payment of Interest; Interest Rights                       
              Preserved.............................................  24 
Section 308.  Persons Deemed Owners.................................  25 
Section 309.  Cancellation..........................................  25 
Section 310.  Computation of Interest...............................  26 
Section 311.  Payment to Be in the Proper Currency..................  26  
</TABLE>

                                      -i-
<PAGE>
 
<TABLE>
<CAPTION>
                                 ARTICLE FOUR

                            Redemption of Securities
 
<C>           <S>                                                     <C> 
Section 401.  Applicability of Article............................... 26 
Section 402.  Election to Redeem; Notice to Trustee.................. 26 
Section 403.  Selection of Securities to Be Redeemed................. 27 
Section 404.  Notice of Redemption................................... 27 
Section 405.  Securities Payable on Redemption Date.................. 28 
Section 406.  Securities Redeemed in Part............................ 29 
                                                                         
<CAPTION>                                                                
                                  ARTICLE FIVE                           
                                                                         
                                 Sinking Funds                           

<C>           <S>                                                     <C> 
Section 501.  Applicability of Article............................... 29 
Section 502.  Satisfaction of Sinking Fund Payments with                 
              Securities............................................. 30 
Section 503.  Redemption of Securities for Sinking Fund.............. 30 

                                                                         
<CAPTION>                                                                
                                  ARTICLE SIX                            
                                                                         
                                   Covenants                             
                                                                         
<C>           <S>                                                     <C> 
Section 601.  Payment of Principal, Premium and Interest............. 31 
Section 602.  Maintenance of Office or Agency........................ 31  
Section 603.  Money for Securities Payments to Be                               
              Held in Trust.......................................... 32  
Section 604.  Corporate Existence.................................... 33  
Section 605.  Maintenance of Properties.............................. 33  
Section 606.  Statement as to Compliance; Notice of Certain                     
              Defaults............................................... 34  
Section 607.  Waiver of Certain Covenants............................ 34  
Section 608.  Restriction on Liens................................... 35  
Section 609.  Restrictions on Sale and                                   
              Lease-Back Transactions................................ 38 
<CAPTION>                                                                

                                 ARTICLE SEVEN                           
                                                                         
                           Satisfaction and Discharge                    
                                                                         
<C>           <S>                                                     <C> 
Section 701.  Satisfaction and Discharge of Indenture................ 39 
Section 702.  Legal and Covenant Defeasance.......................... 40 
Section 703.  Application of Trust Money............................. 44  
</TABLE>                                                               
                                                                         
                                     -ii-                               
<PAGE>
 
<TABLE>
<CAPTION>
                                 ARTICLE EIGHT

                          Events of Default; Remedies

<C>           <S>                                                     <C> 
Section 801.   Events of Default..................................... 44 
                                                                         
Section 802.   Acceleration of Maturity; Rescission and                  
               Annulment............................................. 46 
Section 803.   Collection of Indebtedness and Suits for                  
               Enforcement by Trustee................................ 47 
Section 804.   Trustee May File Proofs of Claim...................... 48 
Section 805.   Trustee May Enforce Claims Without Possession             
               of Securities......................................... 49 
Section 806.   Application of Money Collected........................ 49 
Section 807.   Limitations on Suits.................................. 49 
Section 808.   Unconditional Right of Holders to Receive                 
               Principal, Premium and Interest....................... 50 
Section 809.   Restoration of Rights and Remedies.................... 50 
Section 810.  Rights and Remedies Cumulative......................... 52 
Section 811.  Delay or Omission Not Waiver........................... 52 
Section 812.  Control by Holders of Securities....................... 52 
Section 813.  Waiver of Past Defaults................................ 53 
Section 814.  Undertaking for Costs.................................. 53 
                                                                         
<CAPTION>                                                                
                                  ARTICLE NINE                           
                                                                         
                                  The Trustee                            
<C>           <S>                                                     <C> 
Section 901.   Certain Duties and Responsibilities................... 54  
Section 902.   Notice of Defaults.................................... 55  
Section 903.   Certain Rights of Trustee............................. 55  
Section 904.   Not Responsible for Recitals or Issuance of                      
               Securities............................................ 57  
Section 905.   May Hold Securities................................... 57  
Section 906.   Money Held in Trust................................... 57  
Section 907.   Compensation and Reimbursement........................ 57  
Section 908.   Disqualification; Conflicting Interests............... 58  
Section 909.   Corporate Trustee Required; Eligibility............... 65  
Section 910.   Resignation and Removal; Appointment of                          
               Successor............................................. 65  
Section 911.   Acceptance of Appointment by Successor................ 67  
Section 912.   Merger, Conversion, Consolidation or                             
               Succession to Business................................ 68 
Section 913.  Preferential Collection of Claims                          
              Against Company........................................ 69 
Section 914.  Appointment of Authenticating Agent.................... 73  
</TABLE>                                                          

                                     -iii-
<PAGE>
 
<TABLE> 
<CAPTION> 
                                  ARTICLE TEN

               Holders' Lists and Reports by Trustee and Company

<C>           <S>                                                     <C> 
Section 1001.  Company to Furnish Trustee Names and
               Addresses of Holders.................................. 75
Section 1002.  Preservation of Information;
               Communications to Holders............................. 75
Section 1003.  Reports by Trustee.................................... 77
Section 1004.  Reports by Company.................................... 78
 
<CAPTION> 
                                ARTICLE ELEVEN

             Consolidation, Merger, Conveyance, Transfer or Lease

<C>           <S>                                                     <C>   
Section 1102. Successor Corporation Substituted...................... 80
<CAPTION> 

                                ARTICLE TWELVE

                            Supplemental Indentures

<C>           <S>                                                     <C>    
Section 1201.  Supplemental Indentures Without Consent
               of Holders............................................ 80
Section 1202.  Supplemental Indentures with Consent of
               Holders............................................... 82
Section 1203.  Execution of Supplemental Indentures.................. 84
Section 1204.  Effect of Supplemental Indentures..................... 84
Section 1205.  Conformity With Trust Indenture Act................... 84
Section 1206.  Reference in Securities to Supplemental
               Indentures............................................ 84
Section 1207.  Modification Without Supplemental
               Indenture............................................. 85
<CAPTION> 
                               ARTICLE THIRTEEN

                  Meetings of Holders; Action Without Meeting
<C>           <S>                                                     <C>    
Section 1301.  Purposes for Which Meetings                              
               May Be Called......................................... 85
Section 1302.  Call, Notice and Place of Meetings.................... 85
Section 1303.  Persons Entitled to Vote at Meetings.................. 86
Section 1304.  Quorum; Action........................................ 86
Section 1305.  Attendance at Meetings; Determination of                 
               Voting Rights; Conduct and Adjournment                   
               of Meetings........................................... 88
Section 1306.  Counting Votes and Recording Action of                   
               Meetings.............................................. 89
Section 1307.  Action Without Meeting................................ 89
Section 1308.  Fixing of Record Date................................. 89 
</TABLE>

                                     -iv-
<PAGE>
 
<TABLE> 
<CAPTION> 
                               ARTICLE FOURTEEN

                   Immunity of Incorporators, Stockholders,
                            Officers and Directors

<C>            <S>                                                     <C>   
Section 1401.  Liability Solely Corporate............................. 90
</TABLE> 

                                      -v-
<PAGE>
 
                                                                    Exhibit 4(i)
                                                                  Execution Copy
                                                                  --------------

          INDENTURE dated as of September 1, 1996, between ENERGEN
CORPORATION, a corporation duly organized and existing under the laws of the
State of Alabama (herein called the "Company"), having its principal office at
2101 Sixth Avenue North, Birmingham, Alabama 35203, and The Bank of New York, a
state banking corporation organized under the laws of the State of New York and
having its principal corporate trust office at Jacksonville, Florida, as
trustee (herein called the "Trustee").

                             RECITAL OF THE COMPANY

          WHEREAS, the Company has duly authorized the execution and delivery of
this Indenture to provide for the issuance from time to time of its unsecured
debentures, notes or other evidences of indebtedness (herein called the
"Securities"), to be issued in one or more series as in this Indenture provided;
and all other things necessary to make this Indenture a valid agreement of the
Company, in accordance with its terms, have been done.

          NOW, THEREFORE, THIS INDENTURE WITNESSETH:

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


                                  ARTICLE ONE

            Definitions and Other Provisions of General Application
            -------------------------------------------------------

          Section 101.  Definitions.
                        ----------- 

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

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

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

          (c) all accounting terms not otherwise defined herein have the
meanings assigned to them in accordance with generally accepted accounting
principles in the United States of America, and except as otherwise herein
expressly provided, the term "generally accepted accounting principles" with
respect to any
<PAGE>
 
computation required or permitted hereunder shall mean such accounting
principles as are generally accepted in the United States of America at the date
of such computation; provided however, that in determining generally accepted
accounting principles applicable to the Company, the Company shall, to the
extent required, conform to any order, rule or regulation of any administrative
agency, regulatory authority or other governmental body having jurisdiction over
the Company; and

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

          Certain terms, used principally in Article Nine, are defined in that
Article.

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

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

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

          "Board of Directors" means either the board of directors of the
Company or any duly authorized committee thereof.

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

          "Business Day", when used with respect to a Place of Payment or any
other particular location specified in the Securities or this Indenture, means
any day, other than a Saturday or Sunday, which is not a day on which banking
institutions and trust companies in such Place of Payment or other location are
generally authorized or required by law, regulation or executive order to remain
closed, except as may be otherwise specified as contemplated by Section 301.

          "Capital Stock" means, with respect to any Person, any and all shares,
interests, participation or other equivalents

                                      -2-
<PAGE>
 
(however designated, whether voting or non-voting) of such Person's capital
stock, whether now outstanding or issued after the date of this Indenture,
including, without limitation, all common stock and preferred stock.

          "Commission" means the Securities and Exchange Commission, as from
time to time constituted, created under the Securities Exchange Act of 1934, or,
if at any time after the execution of this instrument such Commission is not
existing and performing such duties now assigned to it under the Trust Indenture
Act, then the body performing such duties at such time.

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

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

          "Corporate Trust Office" means the office of the Trustee at which at
any particular time its corporate trust business shall be principally
administered, which office at the date of execution of this Indenture is located
at 10161 Centurion Parkway, Towermarc Plaza, 2nd Floor, Jacksonville, FL 32256,
Attention:  Sandra Carreker.

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

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

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

          "Eligible Obligations" means:

          (a) with respect to Securities denominated in United States Dollars,
Government Obligations; or

          (b) with respect to Securities denominated in a currency other than
United States Dollars or in a composite currency, such other obligations or
instruments as shall be specified with respect to such Securities, as
contemplated by Section 301.

                                      -3-
<PAGE>
 
          "Event of Default" has the meaning specified in Section 801.

          "Funded Debt" means all indebtedness of a Person that by its terms or
by the terms of any instrument or agreement relating thereto matures more than
one year from, or is directly or indirectly renewable or extendable at the
option of such Person to a date more than one year from the date of creation
thereof (including an option of such Person under a revolving credit or similar
agreement obligating the lender or lenders to extend credit over a period of one
year or more), but excluding any payments due under the terms thereof within 12
months of any date of determination (including any deposit or payment required
to be made under any prepayment provision, sinking fund, purchase fund or
similar provision).

          "Government Obligations" means:

          (a) direct obligations of, or obligations the principal of and
interest on which are unconditionally guaranteed by, the United States of
America entitled to the benefit of the full faith and credit thereof; and

          (b) certificates, depositary receipts or other instruments which
evidence a direct ownership interest in obligations described in clause (a)
above or in any specific interest or principal payments due in respect thereof;
provided, however, that the custodian of such obligations or specific interest
or principal payments shall be a bank or trust company subject to Federal or
state supervision or examination with a combined capital and surplus of at least
$50,000,000; and provided, further, that except as may be otherwise required by
law, such custodian shall be obligated to pay to the holders of such
certificates, depositary receipts or other instruments the full amount received
by such custodian in respect of such obligations or specific payments and shall
not be permitted to make any deduction therefrom.

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

          "Indenture" means this instrument as originally executed and as it may
from time to time be supplemented or amended by one or more indentures
supplemental hereto entered into pursuant to the applicable provisions hereof
and shall include the terms of particular series of Securities established as
contemplated by Section 301.

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


                                      -4-
<PAGE>
 
          "Interest Payment Date", when used with respect to any Security, means
the Stated Maturity of an installment of interest on such Security.

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

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

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

          "Original Issue Discount Security" means any Security which provides
for an amount less than the principal amount thereof to be due and payable upon
a declaration of acceleration of the Maturity thereof pursuant to Section 802.

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

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

          (b) Securities deemed to have been paid in accordance with Section
701; and

          (c) Securities which have been paid pursuant to Section 306 or in
exchange for or in lieu of which other Securities have been authenticated and
delivered pursuant to this Indenture, other than any such Securities in respect
of which there shall have been presented to the Trustee proof satisfactory to it
and the Company that such Securities are held by a bona fide purchaser in whose
hands such Securities are valid obligations of the Company; provided, however,
that in determining whether or not the Holders of the requisite principal amount
of the Securities Outstanding under this Indenture, or the Outstanding
Securities of any series or Tranche, have given any request, demand,
authorization, direction, notice, consent or waiver hereunder or whether or not
a quorum is present at a meeting of Holders of Securities,

          (x) Securities owned by the Company or any other obligor upon the
     Securities or any Affiliate of the Company or of such other obligor (unless
     the Company, such Affiliate

                                      -5-
<PAGE>
 
     or such obligor owns all Securities Outstanding under this Indenture, or
     all Outstanding Securities of each such series and each such Tranche, as
     the case may be, determined without regard to this clause (x)) shall be
     disregarded and deemed not to be Outstanding, except that, in determining
     whether the Trustee shall be protected in relying upon any such request,
     demand, authorization, direction, notice, consent or waiver or upon any
     such determination as to the presence of a quorum, only Securities which
     the Trustee knows to be so owned shall be so disregarded; provided,
     however, that Securities so owned which have been pledged in good faith may
     be regarded as Outstanding if the pledgee establishes to the satisfaction
     of the Trustee the pledgee's right so to act with respect to such
     Securities and that the pledgee is not the Company or any other obligor
     upon the Securities or any Affiliate of the Company or of such other
     obligor;

          (y) the principal amount of an Original Issue Discount Security that
     shall be deemed to be Outstanding for such purposes shall be the amount of
     the principal thereof that would be due and payable as of the date of such
     determination upon a declaration of acceleration of the Maturity thereof
     pursuant to Section 802; and

          (z) the principal amount of any Security which is denominated in a
     currency other than U.S. Dollars or in a composite currency that shall be
     deemed to be Outstanding for such purposes shall be the amount of U.S.
     Dollars which could have been purchased by the principal amount (or, in the
     case of an Original Issue Discount Security, the U.S. Dollar equivalent on
     the date determined as set forth below of the amount determined as provided
     in (y) above) of such currency or composite currency evidenced by such
     Security, in each such case certified to the Trustee in an Officers'
     Certificate based (i) on the average of the mean of the buying and selling
     spot rates quoted by three banks which are members of the New York Clearing
     House Association selected by the Company in effect at 11:00 A.M. (New York
     time) in The City of New York on the fifteenth Business Day preceding any
     such determination or (ii) if on such fifteenth Business Day it shall not
     be possible or practicable to obtain such quotations from such three banks,
     on such other quotations or alternative methods of determination which
     shall be as consistent as practicable with the method set forth in (i)
     above.

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

          "Periodic Offering" means an offering of Securities of a series from
time to time the specific terms of which


                                      -6-
<PAGE>
 
Securities, including without limitation the rate or rates of interest, if any,
thereon, the Stated Maturity or Maturities thereof and the redemption
provisions, if any, with respect thereto, are to be determined by the Company or
its agents upon the issuance of such Securities.

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

          "Place of Payment", when used with respect to the Securities of any
series, means the place or places, specified as contemplated by Section 301, at
which, subject to Section 602, the principal of and premium, if any, and
interest, if any, on the Securities of such series are payable.

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

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

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

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

          "Required Currency" has the meaning specified in Section 311.

          "Responsible Officer", when used with respect to the Trustee, means
any officer in the corporate trust department of the Trustee or any other
officer of the Trustee customarily performing functions similar to those
performed by any such officer and also means, with respect to a particular
corporate trust matter, any other officer of the Trustee to whom such matter is
referred because of his knowledge of and familiarity with the particular
subject.

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


                                      -7-
<PAGE>
 
          "Security Register" and "Security Registrar" have the respective
meanings specified in Section 305.

          "Significant Subsidiary" means each of Alabama Gas Corporation, an
Alabama corporation, and Taurus Exploration, Inc., an Alabama corporation, or
their respective successors by merger, consolidation, sale of assets or
otherwise.

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

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

          "Tranche" means a group of Securities which (a) are of the same series
and (b) have identical terms except as to principal amount and date of issuance.

          "Trustee" means the Person named as the "Trustee" in the first
paragraph of this instrument until a successor Trustee shall have become such
with respect to one or more series of Securities pursuant to the applicable
provisions of this Indenture, and thereafter "Trustee" shall mean or include
each Person who is then a Trustee hereunder, and if at any time there is more
than one such Person, "Trustee" as used with respect to the Securities of any
series shall mean the Trustee with respect to Securities of that series.

          "Trust Indenture Act" means the Trust Indenture Act of 1939 as in
force at the date as of which this instrument was executed, except as provided
in Section 1205.

          "United States" means the United States of America, its territories,
its possessions and other areas subject to its jurisdiction.

          Section 102.  Compliance Certificates and Opinion.
                        ----------------------------------- 

          Except as otherwise expressly provided in this Indenture, upon any
application or request by the Company to the Trustee to take any action under
any provision of this Indenture, the Company shall, if requested by the Trustee,
furnish to the Trustee an Officers' Certificate stating that all conditions
precedent, if any, provided for in this Indenture relating to the proposed
action have been complied with and an Opinion of Counsel stating that in the
opinion of such counsel all such conditions precedent, if any, have been
complied with, except that in the case of any such application or request as to
which the furnishing of such documents is specifically required by any provision
of this Indenture relating to such particular

                                      -8-
<PAGE>
 
application or request, no certificate or opinion need be furnished except as
specifically contemplated by such provision of this Indenture.

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

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

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

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

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

          Section 103.  Form of Documents Delivered to Trustee.
                        -------------------------------------- 

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

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


                                      -9-
<PAGE>
 
          Where any Person is required to make, give or execute two or more
applications, requests, consents, certificates, statements, opinions or other
instruments under this Indenture, they may, but need not, be consolidated and
form one instrument.

          Section 104.  Acts of Holders.
                        --------------- 

          (a) Any request, demand, authorization, direction, notice, consent,
election, waiver or other action provided by this Indenture to be made, given or
taken by Holders may be embodied in and evidenced by one or more instruments of
substantially similar tenor signed by such Holders in person or by an agent duly
appointed in writing or, alternatively, may be embodied in and evidenced by the
record of Holders voting in favor thereof, either in person or by proxies duly
appointed in writing, at any meeting of Holders duly called and held in
accordance with the provisions of Article Thirteen, or a combination of such
instruments and any such record.  Except as herein otherwise expressly provided,
such action shall become effective when such instrument or instruments or record
or both are delivered to the Trustee and, where it is hereby expressly required,
to the Company.  Such instrument or instruments and any such record (and the
action embodied therein and evidenced thereby) are herein sometimes referred to
as the "Act" of the Holders signing such instrument or instruments and so voting
at any such meeting.  Proof of execution of any such instrument or of a writing
appointing any such agent, or of the holding by any Person of a Security, shall
be sufficient for any purpose of this Indenture and (subject to Section 901)
conclusive in favor of the Trustee and the Company, if made in the manner
provided in this Section.   The record of any meeting of Holders shall be proved
in the manner provided in Section 1306.

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

          (c) The principal amount (except as otherwise contemplated in clause
(y) of the proviso to the definition of "Outstanding") and serial numbers of
Securities held by any Person, and the date of holding the same, shall be proved
by the Security Register.

          (d) Any request, demand, authorization, direction, notice, consent,
election, waiver or other Act of a Holder shall bind every future Holder of the
same Security and the

                                     -10-
<PAGE>
 
Holder of every Security issued upon the registration of transfer thereof or in
exchange therefor or in lieu thereof in respect of anything done, omitted or
suffered to be done by the Trustee or the Company in reliance thereon, whether
or not notation of such action is made upon such Security.

          (e) Until such time as written instruments shall have been delivered
to the Trustee with respect to the requisite percentage of principal amount of
Securities for the action contemplated by such instruments, any such instrument
executed and delivered by or on behalf of a Holder may be revoked with respect
to any or all of such Securities by written notice by such Holder or any
subsequent Holder, proven in the manner in which such instrument was proven.

          (f) Securities of any series, or any Tranche thereof, authenticated
and delivered after any Act of Holders may, and shall if required by the
Trustee, bear a notation in form approved by the Trustee as to any action taken
by such Act of Holders.  If the Company shall so determine, new Securities of
any series, or any Tranche thereof, so modified as to conform, in the opinion of
the Trustee and the Company, to such action may be prepared and executed by the
Company and authenticated and delivered by the Trustee in exchange for
Outstanding Securities of such series or Tranche.

          (g) If the Company shall solicit from Holders any request, demand,
authorization, direction, notice, consent, waiver or other Act, the Company may,
at its option, by Board Resolution, fix in advance a record date for the
determination of Holders entitled to give such request, demand, authorization,
direction, notice, consent, waiver or other Act, but the Company shall have no
obligation to do so.  If such a record date is fixed, such request, demand,
authorization, direction, notice, consent, waiver or other Act may be given
before or after such record date, but only the Holders of record at the close of
business on the record date shall be deemed to be Holders for the purposes of
determining whether Holders of the requisite proportion of the Outstanding
Securities have authorized or agreed or consented to such request, demand,
authorization, direction, notice, consent, waiver or other Act, and for that
purpose the Outstanding Securities shall be computed as of the record date.

          Section 105.  Notices, Etc. to Trustee and Company.
                        ------------------------------------ 

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

          (a) the Trustee by any Holder or by the Company shall be sufficient
for every purpose hereunder if made, given,

                                     -11-
<PAGE>
 
furnished or filed in writing to or with the Trustee at its Corporate Trust
Office, or

          (b) the Company by the Trustee or by any Holder shall be sufficient
for every purpose hereunder (unless otherwise herein expressly provided) if in
writing and mailed, first-class postage prepaid, to the Company addressed to the
attention of its Treasurer, at 2101 Sixth Avenue North, Birmingham, Alabama
35203, or at any other address previously furnished in writing to the Trustee by
the Company.

          Section 106.  Notice to Holders of Securities; Waiver.
                        --------------------------------------- 

          Except as otherwise expressly provided herein, where this Indenture
provides for notice to Holders of any event, such notice shall be sufficiently
given, and shall be deemed given, to Holders if in writing and mailed, first
class postage prepaid, to each Holder affected by such event, at the address of
such Holder as it appears in the Security Register, not later than the latest
date, and not earlier than the earliest date, prescribed for the giving of such
notice.

          In case by reason of the suspension of regular mail service or by
reason of any other cause it shall be impracticable to give such notice to
Holders by mail, then such notification as shall be made with the approval of
the Trustee shall constitute a sufficient notification for every purpose
hereunder.  In any case where notice to Holders is given by mail, neither the
failure to mail such notice, nor any defect in any notice so mailed, to any
particular Holder shall affect the sufficiency of such notice with respect to
other Holders.

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

          Section 107.  Conflict with Trust Indenture Act.
                        --------------------------------- 

          If any provision of this Indenture limits, qualifies or conflicts with
another provision hereof which is required to be included in this Indenture by
any of the provisions of the Trust Indenture Act, such required provision shall
control.

          Section 108.  Effect of Headings and Table of Contents.
                        ---------------------------------------- 

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



                                     -12-
<PAGE>
 
          Section 109.  Successors and Assigns.
                        ---------------------- 

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

          Section 110.  Separability Clause.
                        ------------------- 

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

          Section 111.  Benefits of Indenture.
                        --------------------- 

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

          Section 112.  Governing Law.
                        ------------- 

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

          Section 113.  Legal Holidays.
                        -------------- 

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


                                     -13-
<PAGE>
 
                                  ARTICLE TWO

                                 Security Forms
                                 --------------

          Section 201.  Forms Generally.
                        --------------- 

          The definitive Securities of each series shall be in substantially the
forms thereof established in Board Resolutions or Officers' Certificates
pursuant to Board Resolutions, or in indentures supplemental hereto, in each
case with such appropriate insertions, omissions, substitutions and other
variations as are required or permitted by this Indenture, and may have such
letters, numbers or other marks of identification and such legends or
endorsements placed thereon as may be required to comply with the rules of any
securities exchange or as may, consistently herewith, be determined by the
officers executing such Securities, as evidenced by their execution of the
Securities.  If the forms of Securities of any series are established in a Board
Resolution or in an Officers' Certificate pursuant to a Board Resolution, such
Board Resolution and Officers' Certificate, if any, shall be delivered to the
Trustee at or prior to the delivery of the Company Order contemplated by Section
303 for the authentication and delivery of such Securities.

          The Securities of each series shall be issuable in registered form
without coupons.  The definitive Securities shall be produced in such manner as
shall be determined by the officers executing such Securities, as evidenced by
their execution thereof.

          Section 202.  Form of Trustee's Certificate of  
                        Authentication.
                        ---------------------------------

          The Trustee's certificate of authentication shall be in substantially
the form set forth below:

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


                    _________________________________
                    as Trustee

                    By:______________________________
                       Authorized Signatory


                                     -14-
<PAGE>
 
                                 ARTICLE THREE

                                The Securities
                                --------------

          Section 301.  Amount Unlimited; Issuable in Series.
                        ------------------------------------ 

          The aggregate principal amount of Securities which may be
authenticated and delivered under this Indenture is unlimited.

          The Securities may be issued in one or more series.  Subject to the
last paragraph of this Section, there shall be established in a Board Resolution
or in an Officers' Certificate pursuant to a Board Resolution, or established in
one or more indentures supplemental hereto, prior to the issuance of Securities
of any series,

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

          (b) 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 authenticated and delivered upon registration of
     transfer of, or in exchange for, or in lieu of, other Securities of the
     series pursuant to Section 304, 305, 306, 406 or 1206 and, except for any
     Securities which, pursuant to Section 303, are deemed never to have been
     authenticated and delivered hereunder);

          (c) the Person or Persons (without specific identification) to whom
     interest on Securities of such series, or any Tranche thereof, shall be
     payable on any Interest Payment Date, if other than the Person in whose
     name that Security (or one or more Predecessor Securities) is registered at
     the close of business on the Regular Record Date for such interest;

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

          (e) the rate or rates at which the Securities of such series, or any
     Tranche thereof shall bear interest, if any (including the rate or rates at
     which overdue principal, premium or interest shall bear interest, if any),
     or any method or methods by which such rate or rates shall be determined,
     the date or dates from which such interest shall accrue, the Interest
     Payment Dates on which such interest shall be payable and the Regular
     Record Date for the interest payable on Securities on any Interest Payment
     Date; and the basis of computation of interest, if other than as provided
     in Section 310;


                                     -15-
<PAGE>
 
          (f) the place or places where (1) the principal of and premium, if
     any, and interest, if any, on Securities of such series, or any Tranche
     thereof, shall be payable, (2) any Securities of such series, or any
     Tranche thereof, may be surrendered for registration of transfer, (3)
     Securities of such series, or any Tranche thereof, may be surrendered for
     exchange and (4) notices and demands to or upon the Company in respect of
     the Securities of such series, or any Tranche thereof, and this Indenture
     may be served;

          (g) the period or periods within which, the price or prices at which
     and the terms and conditions upon which the Securities of such series, or
     any Tranche thereof, may be redeemed, in whole or in part, at the option of
     the Company;

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

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

          (j) whether Securities of the series may be issued in whole or in part
     in global form and, if so, the identity of the depositary for such
     Securities, in global form, and the terms and conditions, if any, on which
     interests in such Securities, in global form, may be exchanged, in whole or
     in part, for the individual securities represented thereby;

          (k) if the principal of or premium, if any, or interest, if any, on
     the Securities of such series, or any Tranche thereof, are to be payable,
     at the election of the Company or a Holder thereof, in a coin or currency
     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;

          (l) the currency or currencies, including composite currencies, in
     which payment of the principal of and premium, if any, and interest, if
     any, on the Securities of such series, or any Tranche thereof, shall be
     payable (if other than the currency of the United States);

          (m) if the principal of or premium, if any, or interest on the
     Securities of such series, or any Tranche thereof, are to be payable, or
     are to be payable at the election of the Company or a Holder thereof, in
     securities


                                     -16-
<PAGE>
 
     or other property, the type and amount of such securities or other
     property, or the method by which such amount shall be determined, and the
     period or periods within which, and the terms and conditions upon which,
     any such election may be made;

          (n) if the amount of payments of principal of or premium, if any, or
     interest, if any, on the Securities of such series, or any Tranche thereof,
     may be determined with reference to an index, the manner in which such
     amounts shall be determined;

          (o) if other than the principal amount thereof, the portion of the
     principal amount of Securities of such series, or any Tranche thereof,
     which shall be payable upon declaration of acceleration of the Maturity
     thereof pursuant to Section 802;

          (p) any Events of Default, in addition to those specified in Section
     801, with respect to the Securities of such series, and any covenants of
     the Company for the benefit of the Holders of the Securities of such
     series, or any Tranche thereof, in addition to those set forth in Article
     Six;

          (q) the terms, if any, pursuant to which the Securities of such
     series, or any Tranche thereof, may be converted into or exchanged for
     shares of capital stock or other securities of the Company;

          (r) the obligations or instruments, if any, which shall be considered
     to be Eligible Obligations in respect of the Securities of such series, or
     any Tranche thereof, denominated in any currency other than United States
     Dollars or in a composite currency, and any additional or alternative
     provisions for the reinstatement of the Company's indebtedness in respect
     of such Securities after the satisfaction and discharge thereof as provided
     in Section 701;

          (s) if a service charge will be made for the registration of transfer
     or exchange of Securities of such series, or any Tranche thereof, the
     amount or terms thereof;

          (t) any exceptions to Section 113, or variation in the definition of
     Business Day, with respect to the Securities of such series, or any Tranche
     thereof; and

          (u) any other terms of the Securities of such series, or any Tranche
     thereof, not inconsistent with the provisions of this Indenture.

If any of the terms of the series are established in a Board Resolution or in an
Officers' Certificate pursuant to a Board


                                     -17-
<PAGE>
 
Resolution, such Board Resolution and Officers' Certificate, if any, shall be
delivered to the Trustee at or prior to the delivery of the Company Order
contemplated by Section 303 for the authentication and delivery of such
Securities.  With respect to Securities of a series subject to a Periodic
Offering, such Board Resolution or Officer's Certificate may provide general
terms or parameters for Securities of such series and provide either that the
specific terms of particular Securities of such series shall be specified in a
Company Order or that such terms shall be determined by the Company or its
agents in accordance with a Company Order as contemplated by the proviso of the
third paragraph of Section 303.

          Section 302.  Denominations.
                        ------------- 

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

          Section 303.  Execution, Authentication, Delivery and  
                        Dating.
                        ---------------------------------------
          The Securities shall be executed on behalf of the Company by its
Treasurer, Controller, or any Assistant Treasurer and any one of the following
officers of the Company:  Chairman of the Board, President, Executive Vice
President, Senior Vice President, any Vice President, Secretary, Treasurer,
Controller, Assistant Secretary and Assistant Treasurer.  The signature of any
or all of these officers on the Securities may be manual or facsimile.

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

          At any time and from time to time after the execution and delivery of
this Indenture, the Company may deliver Securities of any series executed by the
Company to the Trustee for authentication and delivery, together with a Company
Order for the authentication and delivery of such Securities, and the Trustee in
accordance with such Company Order shall authenticate and deliver such
Securities; provided, however, that, with respect to Securities of a series
subject to a Periodic Offering, (a) such Company Order may be delivered by the
Company to the Trustee prior to the delivery to the Trustee of such Securities
for authentication and delivery, (b) the Trustee shall authenticate and deliver
Securities of such series for original issue from time to time, in an aggregate
principal amount not exceeding the aggregate principal amount established for
such series, all pursuant to a Company Order or pursuant to such


                                     -18-
<PAGE>
 
procedures acceptable to the Trustee as may be specified from time to time by a
Company Order, (c) the maturity date or dates, original issue date or dates,
interest rate or rates and any other terms of Securities of such series shall be
determined by Company Order or pursuant to such procedures and (d) if provided
for in such procedures, such Company Order may authorize authentication and
delivery pursuant to oral or electronic instructions from the Company or its
duly authorized agent or agents, which oral instructions shall be promptly
confirmed in writing.

          In authenticating Securities of any series, and accepting
responsibilities under this Indenture in relation to such Securities, the
Trustee shall be entitled to receive, and (subject to Section 901) shall be
fully protected in relying upon, an Opinion of Counsel stating

          (a) that the forms of such Securities have been duly authorized by the
     Company and have been established in conformity with the provisions of this
     Indenture;

          (b) that the terms of such Securities have been duly authorized by the
     Company and have been established in conformity with the provisions of this
     Indenture; and

          (c) that such Securities, when authenticated and delivered by the
     Trustee and issued and delivered by the Company in the manner and subject
     to any conditions specified in such Opinion of Counsel, will have been duly
     issued under this Indenture and will constitute valid and legally binding
     obligations of the Company, entitled to the benefits provided by this
     Indenture, and enforceable against the Company in accordance with their
     terms, subject, as to enforcement, to applicable bankruptcy, insolvency,
     reorganization, moratorium, fraudulent conveyance or other laws affecting
     creditors' rights generally, and to general principles of equity and
     doctrines applicable thereto (including, but not limited to, all matters of
     public policy);

provided, however, that, with respect to Securities of a series subject to a
Periodic Offering, the Trustee shall be entitled to receive such Opinion of
Counsel only once at or prior to the time of the first authentication of
Securities of such series and that the opinions described in clauses (b) and (c)
above may, alternatively, state, respectively,

          (x) that, when the terms of such Securities shall have been
     established pursuant to a Company Order or pursuant to such procedures as
     may be specified from time to time by a Company Order, all as contemplated
     by and in accordance with a Board Resolution or an Officers' Certificate
     pursuant to a Board Resolution, as the case may be, such terms will have
     been duly authorized by the Company and will have been


                                     -19-
<PAGE>
 
     established in conformity with the provisions of this Indenture; and

          (y) that such Securities, when (1) executed by the Company, (2)
     authenticated and delivered by the Trustee in accordance with this
     Indenture, (3) issued and delivered by the Company and (4) paid for, all as
     contemplated by and in accordance with the aforesaid Company Order or
     specified procedure, as the case may be, will have been duly issued under
     this Indenture and will constitute valid and legally binding obligations of
     the Company, entitled to the benefits provided by the Indenture, and
     enforceable against the Company in accordance with their terms, subject, as
     to enforcement, to applicable bankruptcy, insolvency, reorganization,
     moratorium or other laws affecting creditors' rights generally, and to
     general principles of equity and doctrines applicable thereto (including
     but not limited to, all matters of public policy).

          With respect to Securities of a series subject to a Periodic Offering,
the Trustee may conclusively rely, as to the authorization by the Company of any
of such Securities, the form and terms thereof and the legality, validity,
binding effect and enforceability thereof, upon the Opinion of Counsel and other
documents delivered pursuant to Sections 201 and 301 and this Section, as
applicable, at or prior to the time of the first authentication of Securities of
such series unless and until such opinion or other documents have been
superseded or revoked.  In connection with the authentication and delivery of
securities of a series subject to a Periodic Offering, the Trustee shall be
entitled to assume that the Company's instructions to authenticate and deliver
such Securities do not violate any rules, regulations or orders of any
governmental agency or commission having jurisdiction over the Company.

          If the form or terms of the Securities of any series have been
established by or pursuant to a Board Resolution as permitted by Sections 201 or
301, the Trustee shall not be required to authenticate such Securities if the
issuance of such Securities pursuant to this Indenture will affect the Trustee's
own rights, duties or immunities under the Securities and this Indenture or
otherwise in a manner which is not reasonably acceptable to the Trustee.

          Each Security shall be dated the date of its authentication.

          No Security shall be entitled to any benefit under this Indenture or
be valid or obligatory for any purpose unless there appears on such Security a
certificate of authentication substantially in the form provided for herein
executed by the Trustee or its agent by manual signature, and such certificate
upon any Security shall be conclusive evidence, and the only evidence, that such
Security has been duly authenticated and


                                     -20-
<PAGE>
 
delivered hereunder and is entitled to the benefits of this Indenture.
Notwithstanding the foregoing, if any Security shall have been authenticated and
delivered hereunder to the Company, or any Person acting on its behalf, but
shall never have been issued and sold by the Company, and the Company shall
deliver such Security to the Trustee for cancellation as provided in Section 309
together with a written statement (which need not comply with Section 102 and
need not be accompanied by an Opinion of Counsel) stating that such Security has
never been issued and sold by the Company, for all purposes of this Indenture
such Security shall be deemed never to have been authenticated and delivered
hereunder and shall never be entitled to the benefits hereof.

          Section 304.  Temporary Securities.
                        -------------------- 

          Pending the preparation of definitive Securities of any series, the
Company may execute, and upon Company Order the Trustee shall authenticate and
deliver, temporary Securities which are printed, lithographed, typewritten,
mimeographed or otherwise produced, in any authorized denomination,
substantially of the tenor of the definitive Securities in lieu of which they
are issued, with such appropriate insertions, omissions, substitutions and other
variations as the officers executing such Securities may determine, as evidenced
by their execution of such Securities; provided, however, that temporary
Securities need not recite specific redemption, sinking fund, conversion or
exchange provisions.

          If temporary Securities of any series are issued, the Company shall
cause definitive Securities of such series to be prepared without unreasonable
delay.  After the preparation of definitive Securities of such series, the
temporary Securities of such series shall be exchangeable for definitive
Securities of such series upon surrender of the temporary Securities of such
series at the office or agency of the Company maintained pursuant to Section 602
in a Place of Payment for such series, without charge to the Holder. Upon
surrender for cancellation of any one or more temporary Securities of any
series, the Company shall execute and the Trustee shall authenticate and deliver
in exchange therefor definitive Securities of the same series, of authorized
denominations and of like tenor and aggregate principal amount.

          Until exchanged in full as hereinabove provided, the temporary
Securities of any series shall in all respects be entitled to the same benefits
under this Indenture as definitive Securities of the same series and of like
tenor authenticated and delivered hereunder.


                                     -21-
<PAGE>
 
          Section 305.  Registration, Registration of Transfer 
                        and Exchange.
                        ----------------------------------------

          The Company shall cause to be kept at the office of the Security
Registrar designated pursuant to Section 602 a register (referred to as the
"Security Register") in which, subject to such reasonable regulations as it may
prescribe, the Company shall provide for the registration of Securities and the
registration of transfer thereof.

          Upon surrender for registration of transfer of any Security of any
series at the office or agency of the Company maintained pursuant to Section 602
in a Place of Payment for such series, the Company shall execute, and the
Trustee shall authenticate and deliver, in the name of the designated transferee
or transferees, one or more new Securities of the same series, of authorized
denominations and of like tenor and aggregate principal amount.

          At the option of the Holder, Securities of any series may be exchanged
for other Securities of the same series, of authorized denominations and of like
tenor and aggregate principal amount, upon surrender of the Securities to be
exchanged at any such office or agency.  Whenever any Securities are so
surrendered for exchange, the Company shall execute, and the Trustee shall
authenticate and deliver, the Securities which the Holder making the exchange is
entitled to receive.

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

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

          Unless otherwise provided in a Board Resolution or an Officers'
Certificate pursuant to a Board Resolution, or in an indenture supplemental
hereto, with respect to Securities of any series, or any Tranche thereof, no
service charge shall be made for any registration of transfer or exchange of
Securities, but the Company may require payment of a sum sufficient to cover any
tax or other governmental charge that may be imposed in connection with any
registration of transfer or exchange of Securities, other than exchanges
pursuant to Section 304, 406 or 1206 not involving any transfer.


                                     -22-
<PAGE>
 
          The Company shall not be required (a) to issue, to register the
transfer of or to exchange Securities of any series during a period of 15 days
immediately preceding the date notice is given identifying the serial numbers of
the Securities of such series called for redemption or (b) to issue, to register
the transfer of or to exchange any Security so selected for redemption in whole
or in part, except the unredeemed portion of any Security being redeemed in
part.

          Section 306.  Mutilated, Destroyed, Lost and Stolen  
                        Securities.
                        --------------------------------------

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

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

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

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

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

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


                                     -23-
<PAGE>
 
          Section 307.  Payment of Interest; Interest Rights  
                        Preserved.
                        -------------------------------------

          Unless otherwise provided as contemplated by Section 301 with respect
to the Securities of any series, or any Tranche thereof, interest on any
Security which is payable, and is punctually paid or duly provided for, on any
Interest Payment Date shall be paid to the Person in whose name that Security
(or one or more Predecessor Securities) is registered at the close of business
on the Regular Record Date for such interest.

          Any interest on any Security of any series which is payable, but is
not punctually paid or duly provided for, on any Interest Payment Date (herein
called "Defaulted Interest") shall forthwith cease to be payable to the Holder
on the related Regular Record Date by virtue of having been such Holder, and
such Defaulted Interest may be paid by the Company, at its election in each
case, as provided in clause (a) or (b) below:

          (a) The Company may elect to make payment of any Defaulted Interest to
     the Persons in whose names the Securities of such series (or their
     respective Predecessor Securities) are registered at the close of business
     on a Special Record Date for the payment of such Defaulted Interest, which
     shall be fixed in the following manner.  The Company shall notify the
     Trustee in writing of the amount of Defaulted Interest proposed to be paid
     on each Security of such series and the date of the proposed payment (which
     shall be not less than 25 days after the receipt by the Trustee of such
     notice), and at the same time the Company shall deposit with the Trustee an
     amount money equal to the aggregate amount proposed to be paid in respect
     of such Defaulted Interest or shall make arrangements satisfactory to the
     Trustee for such deposit prior to the date of the proposed payment, such
     money when deposited to be held in trust for the benefit of the Persons
     entitled to such Defaulted Interest as in this clause provided.  Thereupon
     the Trustee shall fix a Special Record Date for the payment of such
     Defaulted Interest which shall be not more than 15 days and not less than
     10 days prior to the date of the proposed payment and not less than 10 days
     after the receipt by the Trustee of the notice of the proposed payment.
     The Trustee shall promptly notify the Company of such Special Record Date
     and, in the name and at the expense of the Company, shall promptly cause
     notice of the proposed payment of such Defaulted Interest and the Special
     Record Date therefor to be mailed, first-class postage prepaid, to each
     Holder of Securities of such series at the address of such Holder as it
     appears in the Security Register, not less than 10 days prior to such
     Special Record Date.  Notice of the proposed payment of such Defaulted
     Interest and the Special Record Date therefor having been so mailed, such
     Defaulted Interest shall be paid to the Persons in whose names the
     Securities of such series (or their respective Predecessor


                                     -24-
<PAGE>
 
     Securities) are registered at the close of business on such Special Record
     Date and shall no longer be payable pursuant to the following clause (b).

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

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

          Section 308.  Persons Deemed Owners.
                        --------------------- 

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

          Section 309.  Cancellation.
                        ------------ 

          All Securities surrendered for payment, redemption, registration of
transfer or exchange or for credit against any sinking fund payment shall, if
surrendered to any Person other than the Trustee, be delivered to the Trustee
and, if not theretofore cancelled, shall be promptly cancelled by the Trustee.
The Company may at any time deliver to the Trustee for cancellation any
Securities previously authenticated and delivered hereunder which the Company
may have acquired in any manner whatsoever or which the Company shall not have
issued and sold, and all Securities so delivered shall be promptly cancelled by
the Trustee.  No Securities shall be authenticated in lieu of or in exchange for
any Securities cancelled as provided in this Section, except as expressly
permitted by this Indenture.  Unless the Company shall direct by a Company
Order that cancelled Securities be returned to it, all cancelled Securities held
by the Trustee shall be destroyed by the Trustee and the Trustee shall deliver a
certificate of destruction to the Company upon the Company's request.

                                      -25-
<PAGE>
 
          Section 310.  Computation of Interest.
                        ----------------------- 

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

          Section 311.  Payment to Be in the Proper Currency.
                        ------------------------------------ 

          In the case of any Securities denominated in any currency other than
United States Dollars or in a composite currency (the "Required Currency"),
except as otherwise provided therein, the obligation of the Company to make any
payment of the principal thereof, or the premium 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 Required Currency, except to the extent
that such tender or recovery shall result in the Trustee timely holding the full
amount of the Required Currency then due and payable.  If any such tender or
recovery is in a currency other than the Required Currency, the Trustee may take
such actions as it considers appropriate to exchange such currency for the
Required Currency.  The costs and risks of any such exchange, including without
limitation 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 except in the case of its
negligence or willful misconduct.  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 FOUR

                            Redemption of Securities
                            ------------------------

          Section 401.  Applicability of Article.
                        ------------------------ 

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

          Section 402.  Election to Redeem; Notice to Trustee.
                        ------------------------------------- 

          The election of the Company to redeem any Securities shall be
evidenced by a Board Resolution or an Officers' Certificate.  The Company shall,
at least 45 days prior to the Redemption Date fixed by the Company (unless a
shorter notice shall be satisfactory to the Trustee) notify the Trustee in

                                      -26-
<PAGE>
 
writing of such Redemption Date and of the principal amount of such Securities
to be redeemed.  In the case of any redemption of Securities (a) prior to the
expiration of any restriction on such redemption provided in the terms of such
Securities or elsewhere in this Indenture or (b) pursuant to an election of the
Company which is subject to a condition specified in the terms of such
Securities, the Company shall furnish the Trustee with an Officers' Certificate
evidencing compliance with such restriction or condition.

          Section 403.  Selection of Securities to Be Redeemed.
                        -------------------------------------- 

          If less than all the Securities of any series, or Tranche thereof, are
to be redeemed, the particular Securities to be redeemed shall be selected by
the Security Registrar from the Outstanding Securities of such series or Tranche
not previously called for redemption, by such method as the Trustee shall deem
fair and appropriate and which may provide for the selection for redemption of
portions (equal to the minimum authorized denomination for Securities of such
series or Tranche or any integral multiple thereof) of the principal amount of
Securities of such series or Tranche of a denomination larger than the minimum
authorized denomination for Securities of such series or Tranche; provided,
however, that if, as indicated in an Officers' Certificate, the Company shall
have offered to purchase all Securities then Outstanding of any series, or any
Tranche thereof, and less than all of such Securities shall have been tendered
to the Company for such purchase, the Trustee, if so directed by Company Order,
shall select for redemption all such Securities which have not been so tendered.

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

          For all purposes of this Indenture, unless the context otherwise
requires, all provisions relating to the redemption of Securities shall relate,
in the case of any Securities redeemed or to be redeemed only in part, to the
portion of the principal amount of such Securities which has been or is to be
redeemed.

          Section 404.  Notice of Redemption.
                        -------------------- 

          Unless otherwise specified as contemplated by Section 301 with respect
to any series of Securities, notice of redemption shall be given in the manner
provided in Section 106 to the Holders to be redeemed not less than 30 nor more
than 60 days prior to the Redemption Date.

          All notices of redemption shall state:

               (a)  the Redemption Date,

                                      -27-
<PAGE>
 
               (b)  the Redemption Price,

               (c) if less than all the Securities of any series or Tranche are
     to be redeemed, the identification of the particular Securities to be
     redeemed and the portion of the principal amount of any Security to be
     redeemed in part,

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

               (e) the place or places where such Securities are to be
     surrendered for payment of the Redemption Price, and

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

          With respect to any notice of redemption of Securities at the election
of the Company, unless, upon the giving of such notice, such Securities shall be
deemed to have been paid in accordance with Section 701, such notice may state
that such redemption shall be conditional upon the receipt by the Trustee, on or
prior to the date fixed for such redemption, of money sufficient to pay the
principal of and premium, if any, and interest, if any, on such Securities and
that if such money shall not have been so received such notice shall be of no
force or effect and the Company shall not be required to redeem such Securities.
In the event that such notice of redemption contains such a condition and such
money is not so received, the redemption shall not be made and within a
reasonable time thereafter notice shall be given, in the manner in which the
notice of redemption was given, that such money was not so received and such
redemption was not required to be made.

          Notice of redemption of Securities to be redeemed at the election of
the Company, and any notice of non-satisfaction of a condition for redemption as
aforesaid, shall be given by the Company or, at the Company's request, by the
Trustee in the name and at the expense of the Company.

          Section 405.  Securities Payable on Redemption Date.
                        ------------------------------------- 

          Notice of redemption having been given as aforesaid, and the
conditions, if any, set forth in such notice having been satisfied, the
Securities or portions thereof so to be redeemed shall, on the Redemption Date,
become due and payable at the Redemption Price therein specified, and from and
after such date (unless, in the case of an unconditional notice of redemption,
the Company shall default in the payment of the Redemption Price and accrued
interest, if any) such Securities or portions thereof, if interest-bearing,
shall cease to bear interest.  Upon surrender of any such Security for
redemption in accordance with such notice, such Security or portion thereof
shall be paid by

                                      -28-
<PAGE>
 
the Company at the Redemption Price, together with accrued interest, if any, to
the Redemption Date; provided, however, that any installment of interest on any
Security the Stated Maturity of which installment is on or prior to the
Redemption Date shall be payable to the Holder of such Security, or one or more
Predecessor Securities, registered as such at the close of business on the
related Regular Record Date according to the terms of such Security or
Predecessor Security and subject to the provisions of Section 307.

          Section 406.  Securities Redeemed in Part.
                        --------------------------- 

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


                                  ARTICLE FIVE

                                 Sinking Funds
                                 -------------

          Section 501.  Applicability of Article.
                        ------------------------ 

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

          The minimum amount of any sinking fund payment provided for by the
terms of Securities of any series, or any Tranche thereof, is herein referred to
as a "mandatory sinking fund payment", and any payment in excess of such minimum
amount provided for by the terms of Securities of any series, or any Tranche
thereof, is herein referred to as an "optional sinking fund payment". If
provided for by the terms of Securities of any series, or any Tranche thereof,
the cash amount of any sinking fund payment may be subject to reduction as
provided in Section 502. Each sinking fund payment shall be applied to the
redemption of Securities of the series or Tranche in respect of which it was
made as provided for by the terms of such Securities.

                                      -29-
<PAGE>
 
          Section 502.  Satisfaction of Sinking Fund Payments with Securities.
                        -----------------------------------------------------

          The Company (a) may deliver Outstanding Securities (other than any
previously called for redemption) of a series or Tranche in respect of which a
mandatory sinking fund payment is to be made and (b) may apply as a credit
Securities of such series or Tranche which have been redeemed either at the
election of the Company pursuant to the terms of such Securities or through the
application of permitted optional sinking fund payments pursuant to the terms of
such Securities, in each case in satisfaction of all or any part of such
mandatory sinking fund payment; provided, however, that no Securities shall be
applied in satisfaction of a mandatory sinking fund payment if such Securities
shall have been previously so applied.  Securities so applied shall be received
and credited for such purpose by the Trustee at the Redemption Price specified
in such Securities for redemption through operation of the sinking fund and the
amount of such mandatory sinking fund payment shall be reduced accordingly.

          Section 503.  Redemption of Securities for Sinking Fund.
                        -----------------------------------------

          Not less than 45 days prior to each sinking fund payment date for the
Securities of any series or any Tranche thereof, the Company shall deliver to
the Trustee an Officers' Certificate specifying:

          (a)  the amount of the next succeeding mandatory sinking fund payment
     for such series or Tranche;

          (b)  the amount, if any, of the optional sinking fund payment to be
     made together with such mandatory sinking fund payment;

          (c)  the aggregate sinking fund payment;

          (d)  the portion, if any, of such aggregate sinking fund payment which
     is to be satisfied by the payment of cash;

          (e)  the portion, if any, of such aggregate sinking fund payment which
     is to be satisfied by delivering and crediting Securities of such series or
     Tranche pursuant to Section 502 and stating the basis for such credit and
     that such Securities have not previously been so credited.

and the Company shall also deliver to the Trustee any Securities to be so
delivered.  If the Company shall not deliver such Officers' Certificate, the
next succeeding sinking fund payment for such series or Tranche shall be made
entirely in cash in the amount of the mandatory sinking fund payment.  Not less
than 30 days before each such sinking fund payment date the Trustee shall

                                      -30-
<PAGE>
 
select the Securities to be redeemed upon such sinking fund payment date in the
manner specified in Section 403 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 404.  Such notice having been duly given, the redemption of such
Securities shall be made upon the terms and in the manner stated in Sections 405
and 406.


                                  ARTICLE SIX

                                   Covenants
                                   ---------

          Section 601.  Payment of Principal, Premium and Interest.
                        ------------------------------------------

          The Company shall pay the principal of and premium, if any, and
interest, if any, on the Securities of each series in accordance with the terms
of such Securities and this Indenture.

          Section 602.  Maintenance of Office or Agency.
                        ------------------------------- 

          The Company shall maintain in each Place of Payment for the Securities
of any series, or any Tranche thereof, an office or agency where such Securities
may be presented or surrendered for payment, where such Securities may be
surrendered for registration of transfer or exchange and where notices and
demands to or upon the Company in respect of such Securities and this Indenture
may be served.  The Company shall give prompt written notice to the Trustee of
the location, and any change in the location, of such office or agency and
prompt notice to the Holders of any such change in the manner specified in
Section 106.  If at any time the Company shall fail to maintain any such
required office or agency in respect of Securities of any series, or any Tranche
thereof, or shall fail to furnish the Trustee with the address thereof, such
presentations and surrenders of such Securities may be made and notices and
demands may be made or served at the Corporate Trust Office of the Trustee, and
the Company hereby appoints the Trustee as its agent to receive such respective
presentations, surrenders, notices and demands.

          The Company may also from time to time designate one or more other
offices or agencies where the Securities of one or more series, or any Tranche
thereof, may be presented or surrendered for any or all such purposes and may
from time to time rescind such designations; provided, however, that no such
                                             --------  -------              
designation or rescission shall in any manner relieve the Company of its
obligation to maintain an office or agency for such purposes in each Place of
Payment for such Securities in accordance with the requirements set forth above.
The Company shall give prompt written notice to the Trustee, and prompt notice
to the Holders in the manner specified in Section 106, of any such designation
or rescission and of any change in the location of any such other office or
agency.

                                      -31-
<PAGE>
 
          Anything herein to the contrary notwithstanding, any office or agency
required by this Section may be maintained at an office of the Company in which
event the Company shall perform all functions to be performed at such office or
agency.

          Section 603.  Money for Securities Payments to Be Held in Trust.
                        -------------------------------------------------

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

          Whenever the Company shall have one or more Paying Agents for the
Securities of any series, or any Tranche thereof, it shall, prior to each due
date of the principal of and premium, if any, or interest, if any, on such
Securities, deposit with such Paying Agents sums sufficient (without
duplication) to pay the principal and premium or interest so becoming due, such
sum to be held in trust for the benefit of the Persons entitled to such
principal, premium or interest and (unless such Paying Agent is the Trustee) the
Company shall promptly notify the Trustee of its action or failure so to act.

          The Company shall cause each Paying Agent for the Securities of any
series, or any Tranche thereof, other than the Trustee, to execute and deliver
to the Trustee an instrument in which such Paying Agent shall agree with the
Trustee, subject to the provisions of this Section, that such Paying Agent
shall:

          (a)  hold all sums held by it for the payment of the principal of and
     premium, if any, or interest, if, on Securities of such series or Tranche
     in trust for the benefit of the Persons entitled thereto until such sums
     shall be paid to such Persons or otherwise disposed of as herein provided;

          (b)  give the Trustee notice of any default by the Company (or any
     other obligor upon the Securities of such series or Tranche) in the making
     of any payment of principal of and premium, if any, or interest, if any, on
     the Securities of such series or Tranche; and

          (c)  at any time during the continuance of any such default, upon the
     written request of the Trustee, forthwith pay to the Trustee all sums so
     held in trust by such Paying Agent.

                                      -32-
<PAGE>
 
          The Company may at any time pay, or by Company Order direct any Paying
Agent to pay, to the Trustee all sums held in trust by the Company or such
Paying Agent, such sums to be held by the Trustee upon the same trusts as those
upon which such sums were held by the Company or such Paying Agent; and, upon
such payment by any Paying Agent to the Trustee, such Paying Agent shall be
released from all further liability with respect to such money.

          Any money deposited with the Trustee or any Paying Agent, or then held
by the Company, in trust for the payment of the principal of and premium, if
any, or interest, if any, on any Security and remaining unclaimed for two years
after such principal and premium, if any, or interest has become due and payable
shall be paid to the Company on Company Request, or, if then held  the Company,
shall be discharged from such trust; and the Holder of such Security shall
thereafter, as an unsecured general creditor, look only to the Company for
payment thereof, and all liability of the Trustee or such Paying Agent with
respect to such trust money, and all liability of the Company as  trustee
thereof, shall thereupon cease; provided, however, that the Trustee or such
Paying Agent, before being required to make any such payment to the Company, may
at the expense of the Company cause to be mailed, on one occasion only, notice
to such Holder that such money remains unclaimed and that, after a date
specified therein, which shall not be less than 30 days from the date of such
mailing, any unclaimed balance of such money then remaining will be paid to the
Company.

          Section 604.  Corporate Existence.
                        ------------------- 

          Subject to the rights of the Company under Article Eleven, the Company
shall 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 franchises of the Company; provided, however, that the Company shall not be
required to preserve any such right or franchise if, in the judgment of the
Company, (i) the preservation thereof is no longer desirable in the conduct of
the business of the Company and (ii) the failure to preserve any such right or
franchise will not adversely affect the interests of the Holders of Securities
of any series or Tranche in any material respect.

          Section 605.  Maintenance of Properties.
                        ------------------------- 

          The Company shall cause (or, with respect to property owned in common
with others, make reasonable effort to cause) all its properties used or useful
in the conduct of its business to be maintained and kept in good condition,
repair and working order and shall cause (or, with respect to property owned in
common with others, make reasonable effort to cause) to be made all necessary
repairs, renewals, replacements, betterments and improvements thereof, all as,
in the judgment of the Company, may be necessary so that the business carried on
in connection

                                      -33-
<PAGE>
 
therewith may be properly conducted; provided, however, that nothing in this
                                     --------  -------                      
Section shall prevent the Company from discontinuing, or causing the
discontinuance of, the operation and maintenance of any of its properties if, in
the judgment of the Company, such discontinuance (i) is desirable in the conduct
of its business and (ii) will not adversely affect the interests of the Holders
of Securities of any series or Tranche in any material respect.

          Section 606.  Statement as to Compliance; Notice of Certain Defaults.
                        ------------------------------------------------------

          The Company shall deliver to the Trustee, within 120 days after the
end of each fiscal year of the Company ending after the date hereof, a brief
certificate, which need not comply with Section 102, from the principal
executive officer, the principal financial officer or the principal accounting
officer of the Company, as to the signer's knowledge of the Company's compliance
with all conditions and covenants under this Indenture.  For purposes of this
Section 606, such compliance shall be determined without regard to any period of
grace or requirement of notice provided under any of the provisions of this
Indenture.  The Company's fiscal year presently ends on September 30 of each
year.

          The Company shall deliver to the Trustee, within 10 days after the
occurrence thereof, written notice of any event of which the Company's Chairman
of the Board, President, Treasurer or Controller has actual knowledge, which
event is, or after notice or lapse of time or both would become, an Event of
Default pursuant to Section 801.

          Section 607.  Waiver of Certain Covenants.
                        --------------------------- 

          The Company may omit in any particular instance to comply with any
term, provision or condition set forth in (a) any additional covenant or
restrictions specified with respect to the Securities of any series, or any
Tranche thereof, as contemplated in Section 301 if before the time for such
compliance the Holders of at least a majority in aggregate principal amount of
the Outstanding Securities of all series and Tranches with respect to which such
covenant or restriction was so specified, considered as one class, shall, by Act
of such Holders, either waive such compliance in such instance or generally
waive compliance with such term, provision or condition and (b) Section 602,
604, 605, 606, 608, 609 or Article Eleven if before the time for such compliance
the Holders of at least a majority in principal amount of Securities Outstanding
under this Indenture shall, by Act of such Holders, either waive such compliance
in such instance or generally waive compliance with such term, provision or
condition; but, in the case of (a) or (b), no such waiver shall extend to or
affect such term, provision or condition except to the extent so expressly
waived, and, until such waiver shall become effective, the obligations of the
Company and the duties

                                      -34-
<PAGE>
 
of the Trustee in respect of any such term, provision or condition shall remain
in full force and effect.

          Section 608.  Restriction on Liens.
                        -------------------- 

          The Company shall not hereafter create, assume, incur or suffer to
exist any mortgage, lien, pledge, charge or encumbrance of any kind, other than
"Excepted Encumbrances," upon any property of the Company, other than "Excepted
Property," whether owned as of the date hereof or hereafter acquired, to secure
indebtedness without effectively providing that the Securities shall be secured
equally and ratably with the indebtedness secured by such mortgage, lien,
pledge, charge or encumbrance.  Subject to the next succeeding sentence, the
restriction contained in this section shall not be applicable to nor prevent the
following:

          (a)  the pledging by the Company of any assets as security for the
     payment of any tax, assessment or other similar charge demanded of the
     Company by any governmental authority or public body so long as the Company
     in good faith contests its liability to pay the same, or as security to be
     deposited with any governmental authority or public body for any person at
     any time required by law or governmental regulation as a condition to the
     transaction of any business or the exercise of any privilege, license or
     right;

          (b)  the pledging by the Company of any assets for the purposes of
     securing a stay or discharge or for any other purpose in the course of any
     legal proceeding in which the Company or a subsidiary is a party or for the
     purpose of obtaining insurance coverage or other surety obligations
     providing for securing such stay or discharge in the event such stay or
     discharge should be required;

          (c)  making good faith deposits or providing security in connection
     with tenders, redemptions, contracts or leases to which the Company is a
     party or deposits for the purpose of terminating obligations under an
     indenture;

          (d)  the pledging by the Company of any assets in connection with the
     incurrence of indebtedness (under circumstances not otherwise excepted from
     the operation of this Section) in aggregate principal amount not exceeding
     five percent (5%) of the assets of the Company as presented in the
     financial statements of the Company contained in the most recently filed
     report on Form 10-K or 10-Q (or successor forms thereto) filed with the
     Commission at the time of such pledge;

          (e)  liens, pledges, security interests or other encumbrances on
     property, shares of stock or indebtedness of any corporation existing at
     the time such corporation

                                      -35-
<PAGE>
 
     becomes a subsidiary of or is merged into the Company, or existing at the
     time of acquisition of such property or stock by the Company;

          (f)  incurring liens, licenses, pledges, security interests or other
     encumbrances (which shall include, without limitation, purchase money
     mortgages, conditional sale agreements and other title retention agreements
     and leases in the nature of title retention agreements) to secure the
     payment of all or any part of the price of acquisition, construction or
     improvement of any property or stock acquired by the Company, or to secure
     any indebtedness incurred by the Company prior to, at the time of, or
     within 180 days after the later of the acquisition or completion of
     construction (including any improvements on an existing property) which
     secured debt is incurred for the purpose of financing all or any part of
     the purchase price thereof or construction or improvements thereon;
     provided, however, that in the case of any such acquisition, construction
     or improvement, the lien, pledge, security interest or other encumbrance
     shall not apply to any property theretofore owned by the Company, other
     than, in the case of any such construction or improvement, any theretofore
     substantially unimproved real property on which the property or improvement
     so constructed is located;

          (g)  any liens, pledges, security interests or other encumbrances
     (which shall include, without limitation, purchase money mortgages,
     conditional sale agreements and other title retention agreements and leases
     in the nature of title retention agreements) on property of the Company in
     favor of the United States of America or any state thereof, or any
     department, agency or instrumentality or political subdivision of the
     United States of America or any state thereof, or in favor of any other
     county or political subdivision thereof, or any department, agency or
     instrumentality of such county or political subdivision, to secure partial
     progress, installment, advance or other payments pursuant to any contract
     or statute or to secure any indebtedness or other obligation (or related
     instrument) incurred for the purpose of financing all or any part of the
     purchase price or the cost of construction of the property subject to such
     liens, pledges, security interest or other encumbrances;

          (h)  any extension, renewal or replacement (or successive extension,
     renewal or replacement) in whole or in part of any lien or encumbrance
     referred to in clauses (a) through (g) above, provided, however, that the
     principal amount of indebtedness secured thereby is not increased and the
     extension, renewal or replacement shall be limited to all or part of the
     property which secured the indebtedness so extended, renewed or replaced
     (plus improvements and construction on such property); or

                                      -36-
<PAGE>
 
          (i)  the lien granted to the Trustee pursuant to Section 907 hereof
     and any substantially equivalent lien granted to the respective trustees
     under the indentures for any other debt securities of the Company.

          Notwithstanding the foregoing, in no event shall the Company create,
assume, incur or suffer to exist pursuant to the foregoing clauses (a) and 
(c)-(i) and any mortgage, lien, pledge, charge or encumbrance on the Capital
Stock of either of the Significant Subsidiaries directly or indirectly owned by
the Company.

          Any instrument creating a lien pursuant to the requirements of this
Section shall contain reasonable and customary provisions for the enforcement of
such lien and for the release of, or substitution for, the property subjected to
such lien.

          The term  "Excepted Encumbrances" as used herein shall mean as of any
                     ---------------------                                     
particular time any of the following:

               (i)  liens for taxes, assessments or governmental charges not
     delinquent and liens for workers' compensation awards and similar
     obligations not delinquent and liens for taxes, assessments or governmental
     charges delinquent but the validity of which is being contested at the time
     by the Company in good faith by appropriate proceedings;

              (ii)  any liens securing indebtedness existing in or relating to
     real estate acquired by the Company for transmission, distribution or
     right-of-way purposes, or in connection with its usual operations;

             (iii)  easements or reservations in any property of the Company
     created for the purpose of roads, rights-of-way, railroads, railroad side
     tracks, electric lines, pipe lines, sewers, water and gas transmission and
     distribution mains, conduits, water rights of states, any subdivision
     thereof or others, building and use restrictions and defects of title to,
     or leases of, any parts of the property of the Company;

              (iv)  undetermined liens and charges incidental to current
     construction, including mechanics', laborers', materialmen's and similar
     liens not delinquent;

               (v)  any obligations or duties affecting the property of the
     Company to any municipality or public authority with respect to any
     franchise, grant, license, permit or certificate;

              (vi)  rights reserved to or vested in any municipality or public
     authority to control or regulate any property of the Company or to use such
     property in a manner

                                      -37-
<PAGE>
 
     which does not materially impair the use of such property for the purposes
     for which it is held by the Company;

             (vii)  any irregularities or deficiencies of title to any rights-
     of-way for mains or pipes and/or appurtenances thereto or other
     improvements thereon and to any real estate used or to be used primarily
     for right of way purposes; and

            (viii)  leases made, or leases existing on property acquired, in the
     ordinary course of business.

          The term "Excepted Property" as used herein shall mean (a) cash,
                    -----------------                                     
bonds, stocks, obligations and other securities (not including Capital Stock
issued by either of the Significant Subsidiaries); (b) choses in action,
accounts receivable, unbilled revenues, judgments and other evidences of
indebtedness and contracts, leases and operating agreements; (c) stock in trade,
merchandise, equipment, apparatus, materials or supplies manufactured or
acquired for the purpose of sale and/or resale in the usual course of business
or consumable in the operation of any of the properties of the Company or held
for the purpose of repairing or replacing (in whole or in part) any rolling
stock, buses, motor coaches, trucks, automobiles or other vehicles or aircraft;
(d) timber, gas, oil, minerals (including without limitation gas reserves and
natural or other gas in underground storage or otherwise), mineral rights and
royalties; (e) materials or products generated, manufactured, produced or
purchased by the Company for sale, distribution, or use in the ordinary course
of its business; (f) office furniture and equipment, tools, rolling stock,
buses, motor coaches, trucks and automobiles and other vehicles and aircraft;
and (g) the Company's franchise to be a corporation.

          Section 609.  Restrictions on Sale and Lease-Back Transactions.  The
                        ------------------------------------------------      
Company will not enter into any arrangement with any Person providing for the
lease to the Company of any property of the Company (except for temporary leases
for a term, including any  renewal thereof, of not more than three years), which
property has been or is to be sold or transferred by the Company (a "Sale and
Lease-back Transaction") to such Person unless the proceeds of such sale are at
least equal to the fair value of such property and either:

          (i) the Company would be entitled, pursuant to the provisions of
     Section 608, to create, assume, incur or suffer to exist a mortgage, lien,
     pledge, charge or encumbrance of any kind to secure indebtedness on the
     property to be leased without equally and ratably securing the Securities;
     or

          (ii) the Company shall, or in any such case the Company covenants that
     it will, within 120 days of the effective date of any such arrangement (or
     in the case of clause (a) below, within six months thereafter pursuant to a
     firm

                                      -38-
<PAGE>
 
     purchase commitment entered into within such 120 day period), apply an
     amount not less than the fair value of such property to any one or more of

               (a) the optional redemption of Securities issued under the
          Indenture in accordance with the provisions of Article Four and the
          terms of such Securities to be so redeemed or the purchase and
          retirement of Securities as provided pursuant to Article Seven hereof,
          or

               (b) the payment or other retirement of Funded Debt incurred or
          assumed by the Company which ranks pari passu with the Securities
          (other than Funded Debt owned by the Company), or

               (c) the purchase at not more than the fair value of property by
          the Company (other than property of the Company involved in such
          sale).


                                 ARTICLE SEVEN

                           Satisfaction and Discharge
                           --------------------------

          Section 701.  Satisfaction and Discharge of Indenture.
                        --------------------------------------- 

          (a) This Indenture shall upon Company Request cease to be of further
effect (except that Sections 304, 305, 306, 404, 503 (as to notice of
redemption), 602, 603, 907 and 914 and this Article Seven shall survive), and
the Trustee, at the expense of the Company, shall execute proper instruments
acknowledging satisfaction and discharge of this Indenture, when

          (i)  either

               (1) all Securities theretofore authenticated and delivered (other
          than (A) Securities which have been destroyed, lost or stolen and
          which have been replaced or paid as provided in Section 306 and (B)
          Securities deemed to have been paid in accordance with Section 702(a))
          have been delivered to the Trustee for cancellation; or

               (2) all Securities not theretofore delivered to the Trustee for
          cancellation (other than Securities described in clause (1)(A) above)
          shall be deemed to have been paid in accordance with Section 702(a);

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

          (iii)  the Company has delivered to the Trustee an Officers'
     Certificate stating that all conditions precedent

                                      -39-
<PAGE>
 
     herein provided for relating to the satisfaction and discharge of this
     Indenture have been complied with.

          (b) In the event there shall be Securities of two or more series
Outstanding hereunder, the Trustee shall be required to execute an instrument
acknowledging satisfaction and discharge of this Indenture only if requested to
do so with respect to Securities of all series as to which it is Trustee and if
the other conditions thereto as required herein are met.  In the event there
shall be two or more Trustees hereunder, then the effectiveness of each such
instrument from each Trustee hereunder shall be conditioned upon receipt of such
instruments from each other Trustee hereunder.

          (c) Upon satisfaction and discharge of this Indenture as provided in
this Section 701, the Trustee shall assign, transfer and turn over to the
Company, subject to the lien provided by Section 907, any and all money,
securities and other property then held by the Trustee for the benefit of the
Holders of the Securities other than money and Eligible Obligations held by the
Trustee pursuant to Section 703.

          Section 702.  Legal and Covenant Defeasance.
                        ----------------------------- 

          (a) On and after the date the Company shall have fulfilled the
conditions of Section 702(c), it shall be deemed to have paid and discharged the
entire Indebtedness represented by any Security or Securities of any series or
Tranche, or any portion of the principal amount thereof, and satisfied its
obligations under this Indenture with respect thereto (hereinafter, "Legal
Defeasance"). Such Securities shall thereafter be deemed to be "Outstanding"
solely for the purposes of Section 703 hereof and the following provisions of
this Indenture shall survive with respect thereto: (i) the rights of Holders of
such Securities to receive, solely from the trust fund described in Section
702(c), payments in respect of the principal of, premium, if any, and interest
on such Securities when such payments are due, or on the redemption date, as the
case may be, and (ii) the obligations of the Company and the Trustee with
respect to such Securities under Sections 304, 305, 306, 404, 503 (as to notice
of redemption), 602, 603, 907 and 914 and this Article Seven.  The Company may
elect to effect a Legal Defeasance under this Section 702(a) notwithstanding the
prior election to effect a Covenant Defeasance under Section 702(b) with respect
to Securities or portions thereof of the same series or Tranche.

          (b) The Company shall be released from its obligations under the
covenants contained in Sections 604 (except with respect to maintaining its
corporate existence), 605, 606, 608 and 609 and Article Eleven with respect to
any Security or Securities of any series or Tranche or any portion of the
principal amount thereof (and under any covenants inserted pursuant to Section
301(u) hereof, in any supplemental indenture,

                                      -40-
<PAGE>
 
Board Resolution or Officers' Certificate establishing such Security), on and
after the date the conditions in Section 702(c) are satisfied (hereinafter,
"Covenant Defeasance").  Such Securities or portions thereof shall thereafter be
deemed not "Outstanding" for the purposes of any direction, waiver, consent or
declaration or Act of Holders (and the consequences of any thereof) in
connection with such covenants, but shall continue to be deemed "Outstanding"
for all other purposes hereunder.  In the event of a Covenant Defeasance, the
Company may omit to comply with and shall have no liability in respect of any
term, condition or limitation set forth in any such covenant, whether directly
or indirectly, by reason of any reference elsewhere herein to any such covenant
or by reason of any reference in any such covenant to any other provision herein
or in any other document and such omission to comply shall not constitute a
Default or an Event of Default under Section 801(c) with respect to such
Securities or portions thereof, but, except as specified above, the remainder of
this Indenture and such Securities or portions thereof shall continue to be in
full force and effect.

          (c) The following shall be the conditions to any defeasance under this
Section 702:

                    (i) there shall have been irrevocably deposited with the
          Trustee, in trust:  (1) money in an amount which shall be sufficient,
          or (2) Eligible Obligations, which shall not contain provisions
          permitting the redemption or other prepayment thereof at the option of
          the issuer thereof, the principal of and the interest on which when
          due, without any regard to reinvestment thereof will provide moneys
          which, together with the money, if any, deposited with or held by the
          Trustee, shall be sufficient, or (3) a combination of (1) or (2) which
          shall be sufficient, to pay when due the principal of and premium, if
          any, and interest, if any, due and to become due on such Securities or
          portions thereof; provided, however, that (x) in the case of the
                            --------  -------                             
          provision for payment or redemption of less than all the Securities of
          any series or Tranche, such Securities or portions thereof shall have
          been selected by the Security Registrar as provided herein and, in the
          case of a redemption, the notice requisite to the validity of such
          redemption shall have been given or irrevocable authority shall have
          been given by the Company to the Trustee to give such notice, under
          arrangements satisfactory to the Trustee and (y) such money or the
          proceeds of such Eligible Obligations shall either (i) have been on
          deposit with the Trustee for a period of at least 90 days, or (ii) the
          Trustee shall have received an Opinion of Counsel reasonably
          satisfactory in form to the Trustee to the effect that payments to
          Holders with such moneys as proceeds are not recoverable as a
          preference under any applicable United States federal

                                      -41-
<PAGE>
 
          or state law relating to bankruptcy, insolvency, receivership,
          winding-up, liquidation, reorganization or relief of debtors;

                    (ii) if such deposit shall have been made prior to the
          Maturity of such Securities, the Company shall have delivered to the
          Trustee a Company Order stating that the money and Eligible
          Obligations deposited with the Trustee in accordance with this Section
          shall be held by the Trustee, in trust, as provided in Section 703;

                    (iii) if Eligible Obligations shall have been deposited with
          the Trustee, the Company shall have delivered to the Trustee an
          opinion of an independent public accountant of nationally recognized
          standing, selected by the Company, to the effect that the requirements
          set forth in clause (i) above have been satisfied;

                    (iv) the Company shall have delivered to the Trustee an
          Opinion of Counsel in the form described in Section 702(d); and

                    (v) the Company shall have delivered to the Trustee an
          Officers' Certificate and an Opinion of Counsel, each stating that all
          conditions precedent herein relating to either the Legal Defeasance
          under Section 702(a) or the Covenant Defeasance under Section 702(b),
          as the case may be, have been complied with.

          (d) (i) In the case of Legal Defeasance under Section 702(a), the
Opinion of Counsel referred to in Section 702(c) shall be in a form reasonably
satisfactory to the Trustee and shall be (x) accompanied by a ruling of the
Internal Revenue Service issued to the Company, or (y) based on a change in law
or regulation occurring after the date hereof, to the effect that the Holders
will not realize income, gain or loss for Federal income tax purposes as a
result of such Legal Defeasance but will realize income, gain or loss on the
Securities, including payments of interest thereon, in the same amounts and in
the same manner and at the same time as would have been the case if such Legal
Defeasance had not occurred; and

                    (ii)  In the case of Covenant Defeasance under Section
          702(b), the Opinion of Counsel referred to in Section 702(c) shall be
          in a form reasonably satisfactory to the Trustee and to the effect
          that the Holders will not realize income, gain or loss for Federal
          income tax purposes as a result of such Covenant Defeasance but will
          realize income, gain or loss on the Securities, including payments of
          interest thereon, in the same manner and at the same times as

                                      -42-
<PAGE>
 
          would have been the case if such Covenant Defeasance had not occurred.

          (e) In the event that the Company effects a Legal Defeasance, upon
receipt by the Trustee of money or Eligible Obligations, or both, in accordance
with Section 702(c), together with the documents required by such paragraph, the
Trustee shall, upon receipt of a Company Request, acknowledge in writing that
the Security or Securities or portions thereof with respect to which such
deposit was made are deemed to have been paid for all purposes of this Indenture
and that the entire indebtedness of the Company in respect thereof is deemed to
have been satisfied and discharged.

          (f) If payment of less than all of the Securities of any series, or
any Tranche thereof, is to be provided for in the manner and with the effect
provided in this Section, the Security Registrar shall select such Securities,
or portions of principal amount thereof in the manner specified by Section 403
for selection for redemption of less than all the Securities of a series or
Tranche.

          (g) In the event that Securities which shall be deemed to have been
paid as a result of a Legal Defeasance (or with respect to which a Covenant
Defeasance has been effected) do not mature and are not to be redeemed within
the 60-day period commencing with the date of the deposit with the Trustee of
moneys or Eligible Obligations, the Company shall, as promptly as practicable,
give a notice, in the same manner as a notice of redemption with respect to such
Securities, to the Holders of such Securities to the effect that such deposit
has been made and the effect thereof.

          (h) The Company shall pay, and shall indemnify the Trustee and each
Holder of Securities which are deemed to have been paid as provided in this
Section against any tax, fee or other charge imposed on or assessed against the
Eligible Obligations deposited with the Trustee or the principal or interest
received by the Trustee in respect of such Eligible Obligations.

          (i) Anything herein to the contrary notwithstanding, if, at any time
after a Legal Defeasance or a Covenant Defeasance is effected pursuant to this
Section (without regard to the provisions of this paragraph (i)), the Trustee
shall be required to return the money or Eligible Obligations, or combination
thereof, deposited with it to the Company or its representative under any
applicable Federal or State bankruptcy, insolvency or other similar law, the
indebtedness of the Company in respect of such Security shall thereupon be
deemed retroactively not to have been satisfied and discharged, as aforesaid,
and to remain Outstanding, or, as the case may be,  the obligations under the
above-mentioned covenants in respect of such Security shall thereupon be deemed
retroactively not to have been released.

                                      -43-
<PAGE>
 
          Section 703.  Application of Trust Money.
                        -------------------------- 

          Neither the Eligible Obligations nor the money deposited with the
Trustee pursuant to Section 702(c)(i), nor the principal or interest payments on
any such Eligible Obligations, shall be withdrawn or used for any purpose other
than, and shall be held in trust for, the payment of the principal of and
premium, if any, and interest, if any, on the Securities or portions of
principal amount thereof in respect of which such deposit was made, all subject,
however, to the provisions of Section 603; provided, however, that, so long as
                                           --------  -------                  
there shall not have occurred and be continuing an Event of Default, any cash
received from such principal or interest payments on such Eligible Obligations
deposited with the Trustee, if not then needed for such purpose, shall, to the
extent practicable, be invested in Eligible Obligations of the type described in
Section 702(c)(i)(2) maturing at such times and in such amounts as shall be
sufficient to pay when due the principal of and premium, if any, and interest,
if any, due and to become due on such Securities or portions thereof on and
prior to the Maturity thereof, and interest earned from such reinvestment shall
be paid over to the Company as received by the Trustee, free and clear of any
trust, lien or pledge under this Indenture except the lien provided by Section
907; and provided, further, that, so long as there shall not have occurred and
         --------  -------                                                    
be continuing an Event of Default, any moneys held by the Trustee in accordance
with this Section on the Maturity of all such Securities in excess of the amount
required to pay the principal of and premium, if any, and interest, if any, then
due on such Securities shall be paid over to the Company free and clear of any
trust, lien or pledge under this Indenture except the lien provided by Section
907.


                                 ARTICLE EIGHT

                          Events of Default; Remedies
                          ---------------------------

          Section 801.  Events of Default.
                        ----------------- 

          "Event of Default", wherever used herein with respect to Securities of
any series, means any one of the following events:

          (a)  failure to pay any interest on any Security of such series within
30 days after the same becomes due and payable; or

          (b)  failure to pay the principal of or premium, if any, on any
Security of such series within three Business Days after it becomes due; or

          (c)  failure to perform or breach of any covenant or warranty of the
Company in this Indenture (other than a covenant or warranty a default in the
performance of which or breach of

                                      -44-
<PAGE>
 
which is elsewhere in this Section specifically dealt with or which has
expressly been included in this Indenture solely for the benefit of one or more
series of Securities other than such series) for a period of 90 days after there
has been given, by registered or certified mail, to the Company by the Trustee,
or to the Company and the Trustee by the Holders of at least 25% in principal
amount of the Outstanding Securities of such series, a written notice specifying
such default or breach and requiring it to be remedied and stating that such
notice is a "Notice of Default" hereunder; or

          (d)  the entry by a court having jurisdiction in the premises of (1) a
decree or order for relief in respect of the Company or a Significant Subsidiary
in an involuntary case or proceeding under any applicable Federal or State
bankruptcy, insolvency, reorganization or other similar law or (2) a decree or
order adjudging the Company or a Significant Subsidiary a bankrupt or insolvent,
or approving as properly filed a petition by one or more Persons other than the
Company or a Significant Subsidiary seeking reorganization, arrangement,
adjustment or composition of or in respect of the Company or a Significant
Subsidiary under any applicable Federal or State law, or appointing a custodian,
receiver, liquidator, assignee, trustee, sequestrator or other similar official
for the Company or a Significant Subsidiary or for any substantial part of its
respective property, or ordering the winding up or liquidation of its affairs,
and any such decree or order for relief or any such other decree or order shall
have remained unstayed and in effect for a period of 90 consecutive days; or

          (e)  the commencement by the Company or a Significant Subsidiary of a
voluntary case or proceeding under any applicable Federal or State bankruptcy,
insolvency, reorganization or other similar law or of any other case or
proceeding to be adjudicated a bankrupt or insolvent, or the consent by it to
the entry of a decree or order for relief in respect of the Company or a
Significant Subsidiary in a case or proceeding under any applicable Federal or
State bankruptcy, insolvency, reorganization or other similar law or to the
commencement of any bankruptcy or insolvency case or proceeding against it, or
the consent by it to the appointment of or taking possession by a custodian,
receiver, liquidator, assignee, trustee, sequestrator or similar official of the
Company or a Significant Subsidiary or of any substantial part of its respective
property, or the making by the Company or a Significant Subsidiary of an
assignment for the benefit of creditors, or the admission by the Company or a
Significant Subsidiary in writing of its inability to pay its debts generally as
they become due, or the authorization of such action by the Board of Directors
of the Company or of a Significant Subsidiary; or

          (f)  a default under any bond, debenture, note or other evidence of
indebtedness by the Company (including a default with respect to Securities of
any series) or by a Significant

                                      -45-
<PAGE>
 
Subsidiary or a default under any mortgage, indenture or instrument under which
there may be issued or by which there may be secured or evidenced any
indebtedness by the Company (including this Indenture) or by a Significant
Subsidiary, in each case aggregating in excess of $10,000,000, whether such
indebtedness now exists or shall hereafter be created, which default shall
constitute a failure to pay any portion of the principal of such indebtedness
when due and payable after the expiration of any applicable grace period with
respect thereto or shall have resulted in such indebtedness becoming or being
declared due and payable prior to the date on which it would otherwise have
become due and payable, if (1) there shall have been given, by registered or
certified mail, to the Company by the Trustee or to the Company and the Trustee
by the Holders of at least 10% in principal amount of the Outstanding Securities
of any series a written notice specifying such default and requiring the Company
to cause such indebtedness to be discharged or cause such acceleration to be
rescinded or annulled and (2) within a period of 10 days after said notice is
given to the Company, such indebtedness is not discharged or such acceleration
is not rescinded or annulled; or

          (g)  any other Event of Default specified with respect to Securities
of such series.

          Section 802.  Acceleration of Maturity; Rescission and Annulment.
                        --------------------------------------------------

          If an Event of Default shall have occurred and be continuing with
respect to Securities of any series at the time Outstanding, then in every such
case the Trustee or the Holders of not less than 33% in principal amount of the
Outstanding Securities of such series may declare the principal amount (or, if
any of the Securities of such series are Original Issue Discount Securities,
such portion of the principal amount of such Securities as may be specified in
the terms thereof as contemplated by Section 301) of all of the Securities of
such series to be due and payable immediately, by a notice in writing to the
Company (and to the Trustee if given by Holders), and upon receipt by the
Company of such notice of such declaration such principal amount (or specified
amount) shall become immediately due and payable; provided, however, that if an
Event of Default shall have occurred and be continuing with respect to more than
one series of Securities, the Trustee or the Holders of not less than 33% in
aggregate principal amount of the Outstanding Securities of all such series,
considered as one class, may make such declaration of acceleration, and not the
Holders of the Securities of any one of such series.

          At any time after such a declaration of acceleration with respect to
Securities of any series shall have been made and before a judgment or decree
for payment of the money due shall have been obtained by the Trustee as
hereinafter in this Article provided, the Event or Events of Default giving rise
to such

                                      -46-
<PAGE>
 
declaration of acceleration shall, without further act, be deemed to have been
waived, and such declaration and its consequences shall, without further act, be
deemed to have been rescinded and annulled, if

          (a)  the Company shall have paid or deposited with the Trustee a sum
     sufficient to pay

               (1)  all overdue interest on all Securities of any such series;

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

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

               (4)  all amounts due to the Trustee under Section 907;

     and

          (b)  any other Event or Events of Default with respect to Securities
     of such series, other than the non-payment of the principal of Securities
     of such series which shall have become due solely by such declaration of
     acceleration, shall have been cured or waived as provided in Section 813.

No such rescission shall affect any subsequent Event of Default or impair any
right consequent thereon.

          Section 803.  Collection of Indebtedness and Suits for Enforcement by
                        Trustee.
                        -------------------------------------------------------

          If any Event of Default described in clause (a) or (b) of Section 801
shall have occurred and be continuing, the Company shall, upon demand of the
Trustee, pay to it, for the benefit of the Holders of the Securities of the
series with respect to which such Event of Default shall have occurred, the
whole amount then due and payable on such Securities for principal and premium,
if any, and interest, if any, and, to the extent required by such Securities and
permitted by law, interest on premium, if any,  and on any overdue principal and
interest, at the rate or rates prescribed therefor in such Securities, and, in
addition thereto, such further amount as shall be sufficient to cover any
amounts due to the Trustee under Section 907.

          If the Company shall fail to pay such amounts forthwith upon such
demand, the Trustee, in its own name and as trustee of an express trust, may
institute a judicial proceeding for the

                                      -47-
<PAGE>
 
collection of the sums so due and unpaid, may prosecute such proceeding to
judgment or final decree and may enforce the same against the Company or any
other obligor upon such Securities and collect the moneys adjudged or decreed to
be payable in the manner provided by law out of the property of the Company or
any other obligor upon such Securities, wherever situated.

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

          Section 804.  Trustee May File Proofs of Claim.
                        -------------------------------- 

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

          (a)  to file and prove a claim for the whole amount of principal,
     premium if any, and interest, if any, owing and unpaid in respect of the
     Securities and to file such other papers or documents as may be necessary
     or advisable in order to have the claims of the Trustee (including any
     claim for amounts due to the Trustee under Section 907) and of the Holders
     allowed in such judicial proceeding, and

          (b)  to collect and receive any moneys or other property payable or
     deliverable on any such claims and to distribute the same;

and any custodian, receiver, assignee, trustee, liquidator, sequestrator or
other similar official in any such judicial proceeding is hereby authorized by
each Holder to make such payments to the Trustee and, in the event that the
Trustee shall consent to the making of such payments directly to the Holders, to
pay to the Trustee any amounts due to it under Section 907.

          Nothing herein contained shall be deemed to authorize the Trustee to
authorize or consent to or accept or adopt on behalf of any Holder any plan of
reorganization, arrangement, adjustment or composition affecting the Securities
or the rights

                                      -48-
<PAGE>
 
of any Holder thereof or to authorize the Trustee to vote in respect of the
claim of any Holder in any such proceeding.

          Section 805.  Trustee May Enforce Claims Without Possession of
                        ------------------------------------------------
                        Securities.
                        ----------

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

          Section 806.  Application of Money Collected.
                        ------------------------------ 

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

          First:  To the payment of all amounts due the Trustee under Section
907;

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

          Third:  To the Company.

          Section 807.  Limitations on Suits.
                        -------------------- 

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

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

          (b)  the Holders of not less than a majority in aggregate principal
     amount of the Outstanding Securities of

                                      -49-
<PAGE>
 
     all series in respect of which an Event of Default shall have occurred and
     be continuing, considered as one class, shall have made written request to
     the Trustee to institute proceedings in respect of such Event of Default in
     its own name as Trustee hereunder;

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

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

          (e)  no direction inconsistent with such written request shall have
     been given to the Trustee during such 60-day period by the Holders of a
     majority in aggregate principal amount of the Outstanding Securities of a
     series in respect of which an Event of Default shall have occurred and be
     continuing, considered as one class;

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

          Section 808.  Unconditional Right of Holders to Receive Principal,
                        Premium and Interest.
                        ---------------------------------------------------

          Notwithstanding any other provision in this Indenture, the Holder of
any Security shall have the right, which is absolute and unconditional, to
receive payment of the principal of and premium, if any, and (subject to Section
307) interest, if any, on such Security on the Stated Maturity or Maturities
expressed in such Security (or, in the case of redemption, on the Redemption
Date) and to institute suit for the enforcement of any such payment, and such
rights shall not be impaired without the consent of such Holder.

          Section 809.  Restoration of Rights and Remedies.
                        ---------------------------------- 

          If the Trustee or any Holder has instituted any proceeding to enforce
any right or remedy under this Indenture and such proceeding shall have been
discontinued or abandoned for any reason, or shall have been determined
adversely to the Trustee or to such Holder, then and in every such case, subject
to any determination in such proceeding, the Company, and Trustee and such
Holder shall be restored severally and respectively to their former positions
hereunder and thereafter all rights and

                                      -50-
<PAGE>
 
remedies of the Trustee and such Holder shall continue as though no such
proceeding had been instituted.

          Section 810.  Rights and Remedies Cumulative.
                        ------------------------------ 

          Except as otherwise provided in the last paragraph of Section 306, no
right or remedy herein conferred upon or reserved to the Trustee or to the
Holders is intended to be exclusive of any other right or remedy, and every
right and remedy shall, to the extent permitted by law, be cumulative and in
addition to every other right and remedy given hereunder or now or hereafter
existing at law or in equity or otherwise.  The assertion or employment of any
right or remedy hereunder, or otherwise, shall not prevent the concurrent
assertion or employment of any other appropriate right or remedy.

          Section 811.  Delay or Omission Not Waiver.
                        ---------------------------- 

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

          Section 812.  Control by Holders of Securities.
                        -------------------------------- 

          If an Event of Default shall have occurred and be continuing in
respect of a series of Securities, the Holders of a majority in principal amount
of the Outstanding Securities of such series shall have the right to direct the
time, method and place of conducting any proceeding for any remedy available to
the Trustee, or exercising any trust or power conferred on the Trustee, with
respect to the Securities of such series; provided, however, that if an Event of
Default shall have occurred and be continuing with respect to more than one
series of Securities, the Holders of a majority in aggregate principal amount of
the Outstanding Securities of all such series, considered as one class, shall
have the right to make such direction, and not the Holders of the Securities of
any one of such series; and provided, further, that

          (a) such direction shall not be in conflict with any rule of law or
     with this Indenture, and could not involve the Trustee in personal
     liability in circumstances where indemnity would not, in the Trustee's sole
     discretion, be adequate;

          (b) the Trustee shall not have determined that the action so directed
     would be unjustly prejudicial to the Holders not taking part in such
     direction; and

                                      -51-
<PAGE>
 
          (c) the Trustee may take any other action deemed proper by the Trustee
     which is not inconsistent with such direction.

          Section 813.  Waiver of Past Defaults.
                        ----------------------- 

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

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

          (b) in respect of a covenant or provision hereof which under Section
     1202 cannot be modified or amended without the consent of the Holder of
     each Outstanding Security of such series affected.

          Upon any such waiver, such default shall cease to exist, and any and
all Events of Default arising therefrom shall be deemed to have been cured, for
every purpose of this Indenture; but no such waiver shall extend to any
subsequent or other default or impair any right consequent thereon.

          Section 814.  Undertaking for Costs.
                        --------------------- 

          The Company and the Trustee agree, and each Holder by his acceptance
thereof shall be deemed to have agreed, that any court may in its discretion
require, in any suit for the enforcement of any right or remedy under this
Indenture, or in any suit against the Trustee for any action taken, suffered or
omitted by it as Trustee, the filing by any party litigant in such suit of an
undertaking to pay the costs of such suit, and that such court may in its
discretion assess reasonable costs, including reasonable attorneys' fees,
against any party litigant in such suit, having due regard to the merits and
good faith of the claims or defenses made by such party litigant; but the
provisions of this Section shall not apply to any suit instituted by the
Company, to any suit instituted by the Trustee, to any suit instituted by any
Holder, or group of Holders, holding in the aggregate more than 10% in aggregate
principal amount of the Outstanding Securities of all series in respect of which
such suit may be brought, considered as one class, or to any suit instituted by
any Holder for the enforcement of the payment of the principal of or premium, if
any, or interest, if any, on any Security on or after the Stated Maturity or
Maturities expressed in such Security (or, in the case of redemption, on or
after the Redemption Date).  This Section 814 shall be in lieu of Section 315(e)
of the Trust Indenture Act and such Section 315(e) is hereby expressly excluded
from this Indenture as permitted by the Trust Indenture Act.

                                      -52-
<PAGE>
 
                                  ARTICLE NINE

                                  The Trustee
                                  -----------

          Section 901.  Certain Duties and Responsibilities.
                        ----------------------------------- 

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

               (1) the Trustee undertakes to perform, with respect to Securities
          of such series, such duties and only such duties as are specifically
          set forth in this Indenture, and no implied covenants or obligations
          shall be read into this Indenture against the Trustee; and

               (2) in the absence of bad faith on its part, the Trustee may,
          with respect to Securities of such series, 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; but in
          the case of any such certificates or opinions which by any provision
          hereof are specifically required to be furnished to the Trustee, the
          Trustee shall be under a duty to examine the same to determine whether
          or not they conform to the requirements of this Indenture.

          (b) In case an Event of Default with respect to Securities of any
     series shall have occurred and be continuing, the Trustee shall exercise,
     with respect to Securities of such series, such of the rights and powers
     vested in it by this Indenture, and use the same degree of care and skill
     in their exercise, as a prudent man would exercise or use under the
     circumstances in the conduct of his own affairs.

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

               (1) this subsection shall not be construed to limit the effect of
          subsection (a) of this Section;

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

               (3) the Trustee shall not be liable with respect to any action
          taken or omitted to be taken by it in good faith in accordance with
          the direction of the

                                      -53-
<PAGE>
 
          Holders of a majority in principal amount of the Outstanding
          Securities of any one or more series, as provided herein, relating to
          the time, method and place of conducting any proceeding for any remedy
          available to the Trustee, or exercising any trust or power conferred
          upon the Trustee, under this Indenture with respect to the Securities
          of such series; and

               (4) no provision of this Indenture shall require the Trustee to
          expend or risk its own funds or otherwise incur any financial
          liability in the performance of any of its duties hereunder, or in the
          exercise of any of its rights or powers, if it shall have reasonable
          grounds for believing that repayment of such funds or adequate
          indemnity against such risk or liability is not reasonably assured to
          it.

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

          Section 902.  Notice of Defaults.
                        ------------------ 

          Within 90 days after the occurrence of any default hereunder with
respect to the Securities of any series, the Trustee shall transmit by mail to
all Holders of Securities of such series entitled to receive reports pursuant to
Section 1003(c), notice of any default hereunder known to the Trustee, unless
such default shall have been cured and waived; provided, however, that, except
in the case of a default in the payment of the principal of or premium, if any,
or interest, if any, on any Security of such series or in the payment of any
sinking fund instalment with respect to Securities of such series, the Trustee
shall be protected in withholding such notice if and so long as the board of
directors, the executive committee or a trust committee of directors or
Responsible Officers of the Trustee in good faith determine that the withholding
of such notice is in the interest of the Holders of Securities of such series;
and provided, further, that in the case of any default of the character
specified in Section 801(c) with respect to Securities of such series, no such
notice to Holders shall be given until at least 75 days after the occurrence
thereof.  For the purpose of this Section, the term "default" means any event
which is, or after notice or lapse of time or both would become, an Event of
Default with respect to Securities of such series.

     Section 903.  Certain Rights of Trustee.
                   ------------------------- 

          Subject to the provisions of Section 901:

          (a) the Trustee may rely and shall be protected in acting or
     refraining from acting upon any resolution, certificate, statement,
     instrument, opinion, report, notice,

                                      -54-
<PAGE>
 
     request, direction, consent, order, bond, debenture, note, other evidence
     of indebtedness or other paper or document believed by it to be genuine and
     to have been signed or presented by the proper party or parties;

          (b) any request or direction of the Company mentioned herein shall be
     sufficiently evidenced by a Company Request or Company Order, or as
     otherwise expressly provided herein, and any resolution of the Board of
     Directors may be sufficiently evidenced by a Board Resolution;

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

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

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

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

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

          (h) except as otherwise provided in Section 801(d), the Trustee shall
     not be charged with knowledge of any Event of Default with respect to the
     Securities of any series for

                                      -55-
<PAGE>
 
     which it is acting as Trustee unless either (1) a Responsible Officer of
     the Trustee assigned to the Corporate Trust Department of the Trustee (or
     any successor division or department of the Trustee) shall have actual
     knowledge of the Event of Default or (2) written notice of such Event of
     Default shall have been given to the Trustee by the Company, any other
     obligor on such Securities or by any Holder of such Securities.

          Section 904.  Not Responsible for Recitals or Issuance of Securities.
                        ------------------------------------------------------

          The recitals contained herein and in the Securities (except the
Trustee's certificates of authentication) shall be taken as the statements of
the Company, and the Trustee or any Authenticating Agent assumes no
responsibility for their correctness.  The Trustee makes no representations as
to the validity or sufficiency of this Indenture or of the Securities.  The
Trustee or any Authenticating Agent shall not be accountable for the use or
application by the Company of Securities of the proceeds thereof, nor shall it
be responsible for any statement in the registration statement or prospectus for
the Securities under the Securities Act of 1933, as amended, or the
determination as to which beneficial owners are entitled to receive any notices
hereunder.

          Section 905.  May Hold Securities.
                        ------------------- 

          The Trustee, any Authenticating Agent, any Paying Agent, any Security
Registrar or any other agent of the Company, in its individual or any other
capacity, may become the owner or pledgee of Securities and, subject to Sections
908 and 913, may otherwise deal with the Company with the same rights it would
have if it were not Trustee, Authenticating Agent, Paying Agent, Security
Registrar or such other agent.

          Section 906.  Money Held in Trust.
                        ------------------- 

          Money held by the Trustee in trust hereunder need not be segregated
from other funds, except to the extent required by law.  Neither the Trustee nor
the Paying Agent shall be under any liability for interest on any money received
by it hereunder except as otherwise agreed with the Company.

          Section 907.  Compensation and Reimbursement.
                        ------------------------------ 

          The Company shall

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

                                      -56-
<PAGE>
 
          (b) except as otherwise expressly provided herein, reimburse the
     Trustee upon its request for all reasonable expenses, disbursements and
     advances reasonably incurred or made by the Trustee in accordance with any
     provision of this Indenture (including the reasonable compensation and the
     expenses and disbursements of its agents and counsel), except any such
     expense, disbursement or advance as may be attributable to its negligence,
     wilful misconduct or bad faith; and

          (c) indemnify the Trustee and its officers, directors, employees and
     agents and hold each of them harmless from and against, any loss, liability
     or expense reasonably incurred without negligence, willful misconduct or
     bad faith on the part of such indemnified party, arising out of or in
     connection with the acceptance or administration of the trust or trusts
     hereunder, including the costs and expenses of defense against any claim or
     liability in connection with the exercise or performance of any of such
     indemnified party's powers or duties hereunder.

          As security for the performance of the obligations of the Company
under this Section, the Trustee shall have a lien prior to the Securities upon
all property and funds held or collected by the Trustee as such other than
property and funds held in trust under Section 703 except as otherwise provided
in Section 703, and other than the property or funds deposited with the Trustee
pursuant to Section 701.  Anything to the contrary notwithstanding, the
obligations of the Company under this Section 907 shall survive payment in full
of the Securities and discharge of this Indenture.

          Section 908.  Disqualification; Conflicting Interests.
                        --------------------------------------- 

          (a) If the Trustee shall have or acquire any conflicting interest, as
defined in this Section, with respect to the Securities of any series, it shall,
within 90 days after ascertaining that it has such conflicting interest and if
the default (as defined in Section 908(d), to which such conflicting interest
relates has not been cured or duly waived or otherwise eliminated before the end
of such 90-day period, either eliminate such conflicting interest or resign with
respect to the Securities of such series in the manner and with the effect
hereinafter specified in this Article.

          (b) In the event that the Trustee shall fail to comply with the
provisions of subsection (a) of this Section with respect to the Securities of
any series, the Trustee shall, within 10 days after the expiration of such 90-
day period, transmit, in the manner and to the extent provided in Section
1003(c), to all Holders of Securities of such series notice of such failure.

                                      -57-
<PAGE>
 
          (c) For the purposes of this Section, the Trustee shall be deemed to
have a conflicting interest with respect to the Securities of any series if the
Securities of such series are in default (as such term is defined in Section
801, but exclusive of any period of grace or requirement of notice); and

               (1) the Trustee is trustee under this Indenture with respect to
          the Outstanding Securities of any series other than such series or is
          trustee under another indenture under which any other securities, or
          certificates of interest or participation in any other securities, of
          the Company are outstanding, unless such other indenture is a
          collateral trust indenture under which the only collateral consists of
          Securities issued under this Indenture; provided, however, that there
          shall be excluded from the operation of this paragraph of this
          Indenture Outstanding Securities of any series other than such series
          or any other indenture under which any other securities, or
          certificates of interest or participation in any other securities, of
          the Company are outstanding, if

                    (A) this Indenture and such other indenture or indentures
               are wholly unsecured and rank equally and such other indenture or
               indentures are hereafter qualified under the Trust Indenture Act,
               unless the Commission shall have found and declared by order
               pursuant to Section 305(b) or Section 307(c) of the Trust
               Indenture Act that differences exist between the provisions of
               this Indenture with respect to Securities of such series and one
               or more other series or the provisions of such other indenture or
               indentures which are so likely to involve a material conflict of
               interest as to make it necessary in the public interest or for
               the protection of investors to disqualify the Trustee from acting
               as such under this Indenture with respect to the Securities of
               such series and such other series or under such other indenture
               or indentures, or

                    (B) the Company shall have sustained the burden of proving,
               on application to the Commission and after opportunity for
               hearing thereon, that trusteeship under this Indenture with
               respect to the Securities of such series and such other series or
               such other indenture or indentures is not so likely to involve a
               material conflict of interest as to make it necessary in the
               public interest or for the protection of investors to disqualify
               the Trustee from acting as such under this Indenture with respect
               to the Securities of such series and such other series or under
               such other indenture or indentures;

                                      -58-
<PAGE>
 
               (2) the Trustee or any of its directors or executive officers is
          an underwriter for the Company;

               (3) the Trustee directly or indirectly controls or is directly or
          indirectly controlled by or is under direct or indirect common control
          with an underwriter for the Company;

               (4) the Trustee or any of its directors or executive officers is
          a director, officer, partner, employee, appointee or representative of
          the Company, or of an underwriter (other than the Trustee itself) for
          the Company who is currently engaged in the business of underwriting,
          except that (A) one individual may be a director and/or an executive
          officer, of the Trustee and a director and/or an executive officer of
          the Company but may not be at the same time an executive officer of
          both the Trustee and the Company; (B) if and so long as the number of
          directors of the Trustee in office is more than nine, one additional
          individual may be a director and/or an executive officer of the
          Trustee and a director of the Company; and (C) the Trustee may be
          designated by the Company or by any underwriter for the Company to act
          in the capacity of transfer agent, registrar, custodian, paying agent,
          fiscal agent, escrow agent or depositary, or in any other similar
          capacity, or, subject to the provisions of paragraph (1) of this
          Section 908(c) to act as trustee, whether under an indenture or
          otherwise;

               (5) 10% or more of the voting securities of the Trustee is
          beneficially owned either by the Company or by any director, partner
          or executive officer thereof, or 20% or more of such voting securities
          is beneficially owned, collectively, by any two or more of such
          persons; or 10% or more of the voting securities of the Trustee is
          beneficially owned either by an underwriter for the Company or by any
          director, partner or executive officer thereof, or is beneficially
          owned, collectively, by any two or more such persons;

               (6) the Trustee is the beneficial owner of, or holds as
          collateral security for an obligation which is in default (as
          hereinafter in this subsection defined), (A) 5% or more of the voting
          securities, or 10% or more of any other class of security, of the
          Company not including the Securities issued under this Indenture and
          securities issued under any other indenture under which the Trustee is
          also trustee or (B) 10% or more of any class of security of any
          underwriter for the Company;

                                      -59-
<PAGE>
 
               (7) the Trustee is the beneficial owner of, or holds as
          collateral security for an obligation which is in default (as
          hereinafter in this subsection defined), 5% or more of the voting
          securities of any person who, to the knowledge of the Trustee, owns
          10% or more of the voting securities of, or controls directly or
          indirectly or is under direct or indirect common control with, the
          Company;

               (8) the Trustee is the beneficial owner of, or holds as
          collateral security for an obligation which is in default (as
          hereinafter in this subsection defined), 10% or more of any class of
          security of any person who, to the knowledge of the Trustee, owns 50%
          or more of the voting securities of the Company; or

               (9) the Trustee owns, on the date of default upon the Securities
          of such series (as such term is defined in Section 801, but exclusive
          of any period of grace or requirement of notice) or any anniversary of
          such default while such default upon the Securities of such series
          remains outstanding, in the capacity of executor, administrator,
          testamentary or inter vivos trustee, guardian, committee or
          conservator, or in any other similar capacity, an aggregate of 25% or
          more of the voting securities, or of any class of security, of any
          person, the beneficial ownership of a specified percentage of which
          would have constituted a conflicting interest under paragraph (6), (7)
          or (8) of this subsection.  As to any such securities of which the
          Trustee acquired ownership through becoming executor, administrator or
          testamentary trustee of an estate which included them, the provisions
          of the preceding sentence shall not apply, for a period of two years
          from the date of such acquisition, to the extent that such securities
          included in such estate do not exceed 25% of such voting securities or
          25% of any such class of security.  Promptly after the dates of any
          such default upon the Securities of such series and annually in each
          succeeding year that the Securities of such series remain in default
          the Trustee shall make a check of its holdings of such securities in
          any of the above-mentioned capacities as of such dates.  If the
          Company shall fail to make payment in full of the principal of or
          premium, if any, or interest, if any, on any of the Securities when
          and as the same becomes due and payable, and such failure shall
          continue for 30 days thereafter, the Trustee shall make a prompt check
          of its holdings of such securities in any of the above-mentioned
          capacities as of the date of the expiration of such 30-day period, and
          after such date, notwithstanding the foregoing provisions of this
          paragraph, all such securities so held by the Trustee, with sole or
          joint control over such securities vested

                                      -60-
<PAGE>
 
          in it, shall, but only so long as such failure shall continue, be
          considered as though beneficially owned by the Trustee for the
          purposes of paragraphs (6), (7) and (8) of this subsection; or

               (10) except under the circumstances described in paragraph (1),
          (3), (4) (5) or (6) of Section 913(b) hereof, the Trustee shall be or
          shall become a creditor of the Company.

          The specification of percentages in paragraphs (5) to (9), inclusive,
of this subsection shall not be construed as indicating that the ownership of
such percentages of the securities of a person is or is not necessary or
sufficient to constitute direct or indirect control for the purposes of
paragraph (3) or (7) of this subsection.

          For the purposes of paragraphs (6), (7), (8) and (9) of this
subsection only, (a) the terms "security" and "securities" shall include only
such securities as are generally known as corporate securities, but shall not
include any note or other evidence of indebtedness issued to evidence an
obligation to repay moneys lent to a person by one or more banks, trust
companies or banking firms, or any certificate of interest or participation in
any such note or evidence of indebtedness; (b) an obligation shall be deemed to
be "in default" when a default in payment of principal shall have continued for
30 days or more and shall not have been cured; and (c) the Trustee shall not be
deemed to be the owner or holder of (1) any security which it holds as
collateral security, as trustee or otherwise, for an obligation which is not in
default as defined in clause (b) above, (2) any security which it holds as
collateral security under this Indenture, irrespective of any default hereunder
or (3) any security which it holds as agent for collection, or as custodian,
escrow agent or depositary, or in any similar representative capacity.

          (d)  For the purpose of this Section:

               (1) the term "underwriter", when used with reference to the
          Company means every person who, within one year prior to the time as
          of which the determination is made, has purchased from the Company
          with a view to, or has offered or sold for the Company in connection
          with, the distribution of any security of the Company outstanding at
          such time, or has participated or has had a direct or indirect
          participation in any such undertaking, or has participated or has had
          a participation in the direct or indirect underwriting of any such
          undertaking, but such term shall not include a person whose interest
          was limited to a commission from an underwriter or dealer not in
          excess of the usual and customary distributors' or sellers'
          commission;

                                     -61-
<PAGE>
 
               (2) the term "director" means any director of a corporation or
          any individual performing similar functions with respect to any
          organization, whether incorporated or unincorporated;

               (3) the term "person" means an individual, a corporation, a
          partnership, an association, a joint-stock company, a trust, an
          unincorporated organization or a government or political subdivision
          thereof; and as used in this paragraph, the term "trust" shall include
          only a trust where the interest or interests of the beneficiary or
          beneficiaries are evidenced by a security;

               (4) the term "voting security" means any security presently
          entitling the owner or holder thereof to vote in the direction or
          management of the affairs of a person, or any security issued under or
          pursuant to any trust, agreement or arrangement whereby a trustee or
          trustees or agent or agents for the owner or holder of such security
          are presently entitled to vote in the direction or management of the
          affairs of a person;

               (5) the term "Company" means any obligor upon the Securities; and

               (6) the term "executive officer" means the president, every vice
          president, every trust officer, the cashier, the secretary and the
          treasurer of a corporation, and any individual customarily performing
          similar functions with respect to any organization whether
          incorporated or unincorporated, but shall not include the chairman of
          the board of directors.

          (e) Except in the case of a default in the payment of the principal of
or interest on any Security, or in the payment of any sinking or purchase fund
installment, the Trustee shall not be required to resign as provided by this
Section 908 if the Trustee shall have sustained the burden of proving, on
application to the Commission and after opportunity for hearing thereon, that
(i) the default under the Indenture may be cured or waived during a reasonable
period and under the procedures described in such application, and (ii) a stay
of the Trustee's duty to resign will not be inconsistent with the interest of
the Holders.  The filing of such an application shall automatically stay the
performance of the duty to resign until the Commission orders otherwise.

          (f) The percentages of voting securities and other securities
specified in this Section shall be calculated in accordance with the following
provisions:

               (1) a specified percentage of the voting securities of the
          Trustee, the Company or any other

                                     -62-
<PAGE>
 
          person referred to in this Section (each of whom is referred to as a
          "person" in this paragraph) means such amount of the outstanding
          voting securities of such person as entitles the holder or holders
          thereof to cast such specified percentage of the aggregate votes which
          the holders of all the outstanding voting securities of such person
          are entitled to cast in the direction or management of the affairs of
          such person;

               (2) a specified percentage of a class of securities of a person
          means such percentage of the aggregate amount of securities of the
          class outstanding.

               (3) the term "amount", when used in regard to securities, means
          the principal amount if relating to evidences of indebtedness, the
          number of shares if relating to capital shares and the number of units
          if relating to any other kind of security;

               (4) the term "outstanding", as used in this  Section, means
          issued and not held by or for the account of the issuer; the following
          securities shall not be deemed outstanding within the meaning of this
          definition:

                   (A) securities of an issuer held in a sinking fund relating
               to securities of the issuer of the same class;

                   (B) securities of an issuer held in a sinking fund relating
               to another class of securities of the issuer, if the obligation
               evidenced by such other class of securities is not in default as
               to principal or interest or otherwise;

                   (C) securities pledged by the issuer thereof as security for
               an obligation of the issuer not in default as to principal or
               interest or otherwise; and

                   (D) securities held in escrow if placed in escrow by the
               issuer thereof;

          provided, however, that any voting securities of an issuer shall be
          deemed outstanding if any person other than the issuer is entitled to
          exercise the voting rights thereof; and

               (5) a security shall be deemed to be of the same class as another
          security if both securities confer upon the holder or holders thereof
          substantially the same rights and privileges; provided, however, that,
          in the case of secured evidences of indebtedness, all of

                                     -63-
<PAGE>
 
          which are issued under a single indenture, differences in the interest
          rates or maturity dates of various series thereof shall not be deemed
          sufficient to constitute such series different classes; and provided,
          further, that, in the case of unsecured evidences of indebtedness,
          differences in the interest rates or maturity dates thereof shall not
          be deemed sufficient to constitute them securities of different
          classes, whether or not they are issued under a single indenture.

          Section 909.  Corporate Trustee Required; Eligibility.
                        --------------------------------------- 

          There shall at all times be a Trustee hereunder which shall be a
corporation organized and doing business under the laws of the United States of
America, any State thereof or the District of Columbia, authorized under such
laws to exercise corporate trust powers, having a combined capital and surplus
of at least $50,000,000 and subject to supervision or examination by Federal or
State authority and qualified and eligible under this Article.  If such
corporation publishes reports of condition at least annually, pursuant to law or
to the requirements of such supervising or examining authority, then for the
purposes of this Section, the combined capital and surplus of such corporation
shall be deemed to be its combined capital and surplus as set forth in its most
recent report of condition so published.  No obligor upon the Securities or
person directly or indirectly controlling, controlled by, or under common
control with such obligor shall serve as Trustee.  If at any time the Trustee
shall cease to be eligible in accordance with the provisions of this Section, it
shall resign immediately in the manner and with the effect hereinafter specified
in this Article.

          Section 910.  Resignation and Removal; Appointment of Successor.
                        -------------------------------------------------

          (a) No resignation or removal of the Trustee and no  appointment of a
successor Trustee pursuant to this Article shall become effective until the
acceptance of appointment by the successor Trustee in accordance with the
applicable requirements of Section 911.

          (b) The Trustee may resign at any time with respect to the Securities
of one or more series by giving written notice thereof to the Company.  If the
instrument of acceptances by a successor Trustee required by Section 911 shall
not have been delivered to the Trustee within 30 days after the giving of such
notice of resignation, the resigning Trustee may petition any court of competent
jurisdiction for the appointment of a successor Trustee with respect to the
Securities of such series.

          (c) The Company may at any time by a Board Resolution remove the
Trustee with respect to the Securities of any or all series.

                                     -64-
<PAGE>
 
          (d)  The Trustee may be removed at any time with respect to the
Securities of any series by Act of the Holders of a majority in principal amount
of the Outstanding Securities of such series delivered to the Trustee and to the
Company.

          (e)  If at any time:

                 (1)  the Trustee shall fail to comply with Section 908(a) after
          written request therefor by any Holder who has been a bona fide Holder
          for at least six months, or

                 (2)  the Trustee shall cease to be eligible under Section 909
          and shall fail to resign after written request therefor by any such
          Holder, or

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

then, in any such case, subject to Section 814, any Holder who has been a bona
fide Holder for at least six months may, on behalf of himself and all others
similarly situated, petition any court of competent jurisdiction for the removal
of the Trustee with respect to all Securities and the appointment of a successor
Trustee or Trustees.

          (f)  If the Trustee shall resign, be removed or become incapable of
acting, or if a vacancy shall occur in the office of Trustee for any cause, with
respect to the Securities of one or more series, the Company, by a Board
Resolution, shall promptly appoint a successor Trustee or Trustees with respect
to the Securities of that or those series (it being understood that any such
successor Trustee may be appointed with respect to the Securities of one or more
or all of such series and that at any time there shall be only one Trustee with
respect to the Securities of any particular series) and shall comply with the
applicable requirements of Section 911.  If, within one year after such
resignation, removal or incapability, or the occurrence of such vacancy, a
successor Trustee with respect to the Securities of any series shall be
appointed by Act of the Holders of a majority in principal amount of the
Outstanding Securities of such series delivered to the Company and the retiring
Trustee, the successor Trustee so appointed shall, forthwith upon its acceptance
of such appointment in accordance with the applicable requirements of Section
911, become the successor Trustee with respect to the Securities of such series
and to that extent supersede the successor Trustee appointed by the Company.  If
no successor Trustee with respect to the Securities of any series shall have
been so appointed by the

                                     -65-
<PAGE>
 
Company or the Holders and accepted appointment in the manner required by
Section 911, any Holder who has been a bona fide Holder of a Security of such
series for at least six months may, subject to Section 814, on behalf of himself
and all others similarly situated, petition any court of competent jurisdiction
for the appointment of a successor Trustee with respect to the Securities of
such series.

          (g)  The Company shall give notice of each resignation and each
removal of the Trustee with respect to the Securities of any series and each
appointment of a successor Trustee with respect to the Securities of any series
by mailing written notice of such event by first-class mail, postage prepaid, to
all Holders of Securities of such series as their names and addresses appear in
the Security Register.  Each notice shall include the name of the successor
Trustee with respect to the Securities of such series and the address of its
Corporate Trust Office.

          Section 911.  Acceptance of Appointment by Successor.
                        -------------------------------------- 

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

          (b)  In case of the appointment hereunder of a successor Trustee with
respect to the Securities of one or more (but not all) series, the Company, the
retiring Trustee and each successor Trustee with respect to the Securities of
one or more series shall execute and deliver an indenture supplemental hereto
wherein each successor Trustee shall accept such appointment and which (1) shall
contain such provisions as shall be necessary or desirable to transfer and
confirm to, and to vest in, each successor Trustee all the rights, powers,
trusts and duties of the retiring Trustee with respect to the Securities of that
or those series to which the appointment of such successor Trustee relates, (2)
if the retiring Trustee is not retiring with respect to all Securities, shall
contain such provisions as shall be deemed necessary or desirable to confirm
that all the rights, powers, trusts and duties of the retiring Trustee with
respect to the Securities of that or those series as to which the retiring
Trustee is not retiring shall continue to be vested in the retiring Trustee and
(3) shall add to or change any of the

                                     -66-
<PAGE>
 
provisions of this Indenture as shall be necessary to provide for or facilitate
the administration of the trusts hereunder by more than one Trustee, it being
understood that nothing herein or in such supplemental indenture shall
constitute such Trustees co-trustees of the same trust and that each such
Trustee shall be trustee of a trust or trusts hereunder separate and apart from
any trust or trusts hereunder administered by any other such Trustee; and upon
the execution and delivery of such supplemental indenture the resignation or
removal of the retiring Trustee shall become effective to the extent provided
therein and each such successor Trustee, without any further act, deed or
conveyance, shall become vested with all the rights, powers, trusts and duties
of the retiring Trustee with respect to the Securities of that or those series
to which the appointment of such successor Trustee relates; but, on request of
the Company or any successor Trustee, such retiring Trustee, upon payment of all
sums owed to it, shall duly assign, transfer and deliver to such successor
Trustee all property and money held by such retiring Trustee hereunder with
respect to the Securities of that or those series to which the appointment of
such successor Trustee relates.

          (c)  Upon request of any such successor Trustee, the Company shall
execute any instrument which fully vests in and confirm to such successor
Trustee all such rights, powers and trusts referred to in subsection (a) or (b)
of this Section, as the case may be.

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

          Section 912.  Merger, Conversion, Consolidation or Succession to
                        Business.
                        --------------------------------------------------

          Any corporation into which the Trustee may be merged or converted or
with which it may be consolidated, or any  corporation resulting from any
merger, conversion or consolidation to which the Trustee shall be a party, or
any corporation succeeding to all or substantially all the corporate trust
business of the Trustee, shall be successor of the Trustee hereunder, provided
such corporation shall be otherwise qualified and eligible under this Article,
without the execution or filing of any paper or any further act on the part of
any of the parties thereto.  In case any Securities shall have been
authenticated, but not delivered, by the Trustee then in office, any successor
by merger, conversion or consolidation to such authenticating Trustee may adopt
such authentication and deliver the Securities so authenticated with the same
effect as if such successor Trustee had itself authenticated such Securities.

                                     -67-
<PAGE>
 
          Section 913.  Preferential Collection of Claims
                        Against Company.
                        ---------------------------------

          (a)  Subject to subsection (b) of this Section, if the Trustee shall
be or shall become a creditor, directly or  indirectly, secured or unsecured, of
the Company within three months prior to a default, as defined in subsection (c)
of this Section, or subsequent to such a default, then, unless and until such
default shall be cured, the Trustee shall set apart and hold in a special
account for the benefit of the Trustee individually, the Holders and the holders
of other indenture securities, as defined in subsection (c) of this Section:

          (1) an amount equal to any and all reductions in the amount due and
     owing upon any claim as such creditor in respect of principal or interest,
     effected after the beginning of such three months' period and valid as
     against the Company and its other creditors, except any such reduction
     resulting from the receipt or disposition of any property described in
     clause (2) of this paragraph, or from the exercise of any right of set-off
     which the Trustee could have exercised if a petition in bankruptcy had been
     filed by or against the Company upon the date of such default; and

          (2) all property received by the Trustee in respect of any claims as
     such creditor, either as security therefor, or in satisfaction or
     composition thereof, or otherwise, after the beginning of such three
     months' period, or an amount equal to the proceeds of any such property, if
     disposed of, subject, however, to the rights, if any, of the Company and
     its other creditors in such property or such proceeds.

          Nothing herein contained, however, shall affect the right of the
Trustee,

          (1) to retain for its own account (A) payments made on account of any
     such claim by any Person (other that the Company) who is liable thereon,
     and (B) the proceeds of the bona fide sale of any such claim by the Trustee
     to a third Person and (C) distributions made in cash, securities or other
     property in respect of claims filed against the Company in bankruptcy or
     receivership or in proceedings for reorganization pursuant to the Federal
     Bankruptcy Act or applicable State laws;

          (2)  to realize, for its own account, upon any property held by it as
     security for any such claim, if such property was so held prior to the
     beginning of such three months' period;

          (3) to realize, for its own account, but only to the extent of the
     claim hereinafter mentioned, upon any property held by it as security for
     any such claim, if such claim was

                                     -68-
<PAGE>
 
     created after the beginning of such three months' period and such property
     was received as security therefor simultaneously with the creation thereof,
     and if the Trustee shall sustain the burden of proving that at the time
     such property was so received the Trustee had no reasonable cause to
     believe that a default, as defined in subsection (c) of this Section, would
     occur within three months; or

          (4) to receive payment on any claim referred to in clause (2) or (3)
     of this paragraph, against the release of any property held as security for
     such claim as provided in such clause (2) or (3), as the case may be, to
     the extent of the fair value of such property.

For the purposes of clauses (2), (3) and (4) of this paragraph, property
substituted after the beginning of such three months' period for property held
as security at the time of such substitution shall, to the extent of the fair
value of the property released, have the same status as the property released,
and, to the extent that any claim referred to in any of such paragraphs is
created in renewal of or in substitution for or for the purpose of repaying or
refunding any pre-existing claim of the Trustee as such creditor, such claim
shall have the same status as such pre-existing claim.

          If the Trustee shall be required to account, the funds and property
held in such special account and the proceeds thereof shall be apportioned among
the Trustee, the Holders and the holders of other indenture securities in such
manner that the Trustee, the Holders and the holders of other indenture
securities realize, as a result of payments from such special account and
payments of dividends on claims filed against the Company in bankruptcy or
receivership or in proceedings for reorganization pursuant to the Federal
Bankruptcy Act or applicable State law, the same percentage of their respective
claims, figured before crediting to the claim of the Trustee anything on account
of the receipt by it from the Company of the funds and property in such special
account and before crediting to the respective claims of the Trustee and the
Holders and the holders of other indenture securities dividends on claims filed
against the Company in bankruptcy or receivership or in proceedings for
reorganization pursuant to the Federal Bankruptcy Act or applicable State law,
but after crediting thereon receipts on account of the indebtedness represented
by their respective claims from all sources other than from such dividends and
from the funds and property so held in such special account.  As used in this
paragraph, with respect to any claim, the term "dividends" shall include any
distribution with respect to such claim, in bankruptcy or receivership or
proceedings for reorganization pursuant to the Federal Bankruptcy Act or
applicable State law, whether such distribution is made in cash, securities or
other property, but shall not include any such distribution with respect to the
secured portion, if any, of such claim.  The court in which such bankruptcy,
receivership or

                                     -69-
<PAGE>
 
proceedings for reorganization is pending shall have jurisdiction (1) to
apportion among the Trustee, the Holders and the holders of other indenture
securities, in accordance with the provisions of this paragraph, the funds and
property held in such special account and proceeds thereof, or (2) in lieu of
such apportionment, in whole or in part, to give to the provisions of this
paragraph due consideration in determining the fairness of the distributions to
be made to the Trustee and the Holders and the holders of other indenture
securities with respect to their respective claims, in which event it shall not
be necessary to liquidate or to appraise the value of any securities or other
property held in such special account or as security for any such claim, or to
make a specific allocation of such distributions as between the secured and
unsecured portions of such claims, or otherwise to apply to the provisions of
this paragraph as a mathematical formula.

          Any Trustee which has resigned or been removed after the beginning of
such three months' period shall be subject to the provisions of this subsection
as though such resignation or removal had not occurred.  If any Trustee has
resigned or been removed prior to the beginning of such three months' period, it
shall be subject to the provisions of this subsection if and only if the
following conditions exist:

          (1)  the receipt of property or reduction of claim, which would have
     given rise to the obligation to account, if such Trustee had continued as
     Trustee, occurred after the beginning of such three months' period; and

          (2)  such receipt of property or reduction of claim occurred within
     three months after such resignation or removal.

          (b) There shall be excluded from the operation of subsection (a) of
this Section a creditor relationship arising from:

          (1) the ownership or acquisition of securities issued under any
     indenture, or any security or securities having a maturity of one year or
     more at the time of acquisition by the Trustee;

          (2) advances authorized by a receivership or bankruptcy court of
     competent jurisdiction or by this Indenture, for the purpose of preserving
     any property which shall at any time be subject to the lien of this
     Indenture or of discharging tax liens or other prior liens of encumbrances
     thereon, if notice of such advances and of the circumstances surrounding
     the making thereof is given to the Holders at the time and in the manner
     provided in this Indenture;

                                     -70-
<PAGE>
 
          (3) disbursements made in the ordinary course of business in the
     capacity of trustee under an indenture, transfer agent, registrar,
     custodian, paying agent, fiscal agent or depositary, or other similar
     capacity;

          (4) an indebtedness created as a result of services rendered or
     premises rented; or an indebtedness created as a result of goods or
     securities sold in a cash transaction, as defined in subsection (c) of this
     Section;

          (5) the ownership of stock or of other securities of a corporation
     organized under the provisions of Section 25(a) of the Federal Reserve Act,
     as amended, which is directly or indirectly a creditor of the Company; and

          (6) the acquisition, ownership, acceptance or negotiation of any
     drafts, bills of exchange, acceptances or obligations which fall within the
     classification of self-liquidating paper, as defined in subsection (c) of
     this Section.

          (c) For the purposes of this Section only:

          (1) the term "default" means any failure to make payment in full of
     the principal of or interest on any of the Securities or upon the other
     indenture securities when and as such principal or interest becomes due and
     payable;

          (2) the term "other indenture securities" means securities upon which
     the Company is an obligor outstanding under any other indenture (A) under
     which the Trustee is also trustee, (B) which contains provisions
     substantially similar to the provisions of this Section and (C) under which
     a default exists at the time of the apportionment of the funds and property
     held in such special account;

          (3) the term "cash transaction" means any transaction in which full
     payment for goods or securities sold is made within seven days after
     delivery of the goods or securities in currency or in checks or other
     orders drawn upon banks or bankers and payable upon demand;

          (4) the term "self-liquidating paper" means any draft, bill of
     exchange, acceptance or obligation which is made, drawn, negotiated or
     incurred by the Company for the purpose of financing the purchase,
     processing, manufacturing, shipment, storage or sale of goods, wares or
     merchandise and which is secured by documents evidencing title to,
     possession of, or a lien upon, the goods, wares or merchandise or the
     receivables or proceeds arising from the sale of the goods, wares or
     merchandise previously constituting the security, provided the security is
     received by the Trustee simultaneously with the creation of the creditor
     relationship with the Company arising from the

                                      -71-
<PAGE>
 
     making, drawing, negotiating or incurring of the draft, bill of exchange,
     acceptance or obligations;

          (5) the term "Company" means any obligor upon the Securities; and

          (6) the term "Federal Bankruptcy Act" means the Bankruptcy Act or
     Title 11 of the United States Code.

          Section 914.  Appointment of Authenticating Agent.
                        ----------------------------------- 

          The Trustee may appoint an Authenticating Agent or Agents with respect
to the Securities of one or more series, or any Tranche thereof, which shall be
authorized to act on behalf of the Trustee to authenticate Securities of such
series or Tranche issued upon original issuance, exchange, registration of
transfer or partial redemption thereof or pursuant to Section 306, and
Securities so authenticated shall be entitled to the benefits of this Indenture
and shall be valid and obligatory for all purposes as if authenticated by the
Trustee hereunder.  Wherever reference is made in this Indenture to the
authentication and delivery of Securities by the Trustee or the Trustee's
certificate of authentication, such reference shall be deemed to include
authentication and delivery on behalf of the Trustee by an Authenticating Agent
and a certificate of authentication executed on behalf of the Trustee by an
Authenticating Agent.  Each Authenticating Agent shall be acceptable to the
Company and shall at all times be a corporation organized and doing business
under the laws of the United States of America, any State or territory thereof
or the District of Columbia or the Commonwealth of Puerto Rico, authorized under
such laws to act as Authenticating Agent, having a combined capital and surplus
of not less than $25,000,000 and subject to supervision or examination by
Federal or State authority.  If such Authenticating Agent publishes reports of
condition at least annually, pursuant to law or to the requirements of said
supervising or examining authority, then for the purposes of this Section, the
combined capital and surplus of such Authenticating Agent shall be deemed to be
its combined capital and surplus as set forth in its most recent report of
condition so published.  If at any time an Authenticating Agent shall cease to
be eligible in accordance with the provisions of this Section, such
Authenticating Agent shall resign immediately in the manner and with the effect
specified in this Section.

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

                                      -72-
<PAGE>
 
execution or filing of any paper or any further act on the part of the Trustee
or the Authenticating Agent.

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

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

          The provisions of Sections 308, 904 and 905 shall be applicable to
each Authenticating Agent.

          If an appointment with respect to the Securities of one or more
series, or any Tranche thereof, shall be made pursuant to this Section, the
Securities of such series or Tranche may have endorsed thereon, in addition to
the Trustee's certificate of authentication, an alternate certificate of
authentication substantially in the following form:

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



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



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



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

          If all the Securities of a series may not be originally issued at one
time, and if the Trustee does not have an office capable of authenticating
Securities upon original issuance

                                      -73-
<PAGE>
 
located in a Place of Payment where the Company wishes to have Securities of
such series authenticated upon original issuance, the Trustee, if so requested
by the Company in writing (which writing need not comply with Section 102 and
need not be accompanied by an Opinion of Counsel), shall appoint, in accordance
with this Section and in accordance with such procedures as shall be acceptable
to the Trustee, an Authenticating Agent (which, if so requested by the Company,
may be an Affiliate of the Company) having an office in a Place of Payment
designated by the Company with respect to such series of Securities.


                                  ARTICLE TEN

               Holders' Lists and Reports by Trustee and Company
               -------------------------------------------------

          Section 1001.  Company to Furnish Trustee Names and
                         Addresses of Holders.
                         -------------------- 

          The Company shall furnish or cause to be furnished to the Trustee

          (a) semiannually, not later than April 1 and October 1, in
     each year, a list, in such form as the Trustee may reasonably require,
     containing all the information in the possession or control of the Company,
     or any of its Paying Agents other than the Trustee, as to the names and
     addresses of the Holders as of the preceding March 15 or September 15, as
     the case may be, and

          (b) at such other times as the Trustee may request in writing, within
     30 days after the receipt by the Company of any such request, a list of
     similar form and content as of a date not more than 15 days prior to the
     time such list is furnished;

provided, however, that, so long as the Trustee is the Security Registrar, no
such list shall be required to be furnished.

          Section 1002.  Preservation of Information;
                         Communications to Holders.
                         ----------------------------

          (a) The Trustee shall preserve, in as current a form as is reasonably
practicable, the names and addresses of Holders (1) contained in the most recent
list furnished to the Trustee as provided in Section 1001 and (2) received by
the Trustee in any other capacity.  The Trustee may (1) destroy any list
furnished to it as provided in Section 1001 upon receipt of a new list so
furnished, (2) destroy any information received by it as Paying Agent (if so
acting) hereunder upon delivering to itself as Trustee, not earlier than
March 15 or September 15, a list containing the names and addresses of
the Holders obtained from such information since the delivery of the next
previous list, if

                                      -74-
<PAGE>
 
any, and (3) destroy any list delivered to itself as Trustee which was compiled
from information received by it as Paying Agent (if so acting) hereunder upon
the receipt of a new list so delivered.

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

          (1) afford such applicants access to the information preserved at the
     time by the Trustee in accordance with Section 1002(a), or

          (2) inform such applicants as to the approximate number of Holders
     whose names and addresses appear in the information preserved at the time
     by the Trustee in accordance with Section 1002(a), and as to the
     approximate cost of mailing to such Holders the form of proxy or other
     communication, if any, specified in such application.

          If the Trustee shall elect not to afford such applicants access to
such information, the Trustee shall, upon the written request of such
applicants, mail to each Holder whose name and address appear in the information
preserved at the time by the Trustee in accordance with Section 1002(a) a copy
of the form of proxy or other communication which is specified in such request,
with reasonable promptness after a tender to the Trustee by such applicants of
the material to be mailed and of payment, or provision for the payment, of the
reasonable expenses of mailing, unless within five days after such tender the
Trustee shall mail to such applicants and file with the Commission, together
with a copy of the material to be mailed, a written statement to the effect
that, in the opinion of the Trustee, such mailing would be contrary to the best
interest of the Holders or would be in violation of applicable law.  Such
written statement shall specify the basis of such opinion.  If the Commission,
after opportunity for a hearing upon the objections specified in the written
statement so filed, shall enter an order refusing to sustain any of such
objections or if, after the entry of an order sustaining one or more of such
objections, the Commission shall find, after notice and opportunity for hearing,
that all the objections so sustained have been met and shall enter an order so
declaring, the Trustee shall mail copies of such material to all such Holders
with reasonable promptness after the entry of such order and the renewal of such
tender by such applicants as aforesaid; otherwise the Trustee shall be relieved
of any

                                      -75-
<PAGE>
 
obligation or duty to such applicants respecting their application.

          (c) Every Holder of Securities, by receiving and holding the same,
shall be deemed to have agreed with the Company and the Trustee that neither the
Company nor the Trustee nor any agent of either of them shall be held
accountable by reason of the disclosure of any such information as to the names
and addresses of the Holders in accordance with Section 1002(b), regardless of
the source from which such information was derived, and that the Trustee shall
not be held accountable by reason of mailing any material pursuant to a request
made under Section 1002(b).

          Section 1003.  Reports by Trustee.
                         ------------------ 

          (a) Within 60 days after May 15 of each year commencing with the year
1997, the Trustee shall transmit by mail to the Holders, as provided in
subsection (c) of this Section, a brief report dated as of such May 15 with
respect to the following (but if no event has occurred within such period, no
report need be transmitted):

          (1) any change in its eligibility under Section 909 and its
     qualifications under Section 908;

          (2) the creation of or any material change to a relationship specified
     in paragraphs (1) through (10) of Section 908(c);

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

          (4) the amount, interest rate and maturity date of all other
     indebtedness owing by the Company (or by any other obligor on the
     Securities) to the Trustee in its individual capacity, on the date of such
     report, with a brief description of any property held as collateral
     security therefor, except an indebtedness based upon a creditor
     relationship arising in any manner described in Section 913(b)(2), (3), (4)
     or (6);

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

                                      -76-
<PAGE>
 
          (6) any additional issue of Securities which the Trustee has not
     previously reported; and

          (7) any action taken by the Trustee in the performance of its duties
     hereunder which it has not previously reported and which in its opinion
     materially affects the Securities or the Securities of any series, except
     action in respect of a default, notice of which has been or is to be
     withheld by the Trustee in accordance with Section 902.

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

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

          (1) to all Holders, as their names and addresses appear in the
     Security Register; and

          (2) except in the case of reports pursuant to subsection (b) of this
     Section, to each Holder whose name and address is preserved at the time by
     the Trustee, as provided in Section 1002(a).

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

          Section 1004.  Reports by Company.
                         ------------------ 

          The Company shall:

          (a) file with the Trustee, within 45 days after the Company is
required to file the same with the Commission, copies of the annual reports and
of the information, documents and other reports (or copies of such portions of
any of the foregoing as the Commission may from time to time by rules and
regulations prescribe) which the Company may be required to file with the

                                      -77-
<PAGE>
 
Commission pursuant to Section 13 or Section 15(d) of the Securities Exchange
Act of 1934; or, if the Company is not required to file information, documents
or reports pursuant to either of said Sections, then it shall file with the
Trustee and the Commission, in accordance with the rules and regulations
prescribed from time to time by the Commission, such of the supplementary and
periodic information, documents and reports which may be required pursuant to
Section 13 of the Securities Exchange Act of 1934 in respect of a security
listed and registered on a national securities exchange as may be prescribed
from time to time in such rules and regulations;

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

          (c) transmit, within 30 days after the filing thereof with the
Trustee, to the Holders, in the manner and to the extent provided in Section
1003(c) with respect to reports pursuant to Section 1003(a), such summaries of
any information, documents and reports required to be filed by the Company
pursuant to paragraphs (a) and (b) of this Section as may be required by rules
and regulations prescribed from time to time by the Commission.


                                 ARTICLE ELEVEN

              Consolidation, Merger, Conveyance, Transfer or Lease
              ----------------------------------------------------

          Section 1101. Company May Consolidate, etc., Only on
                        Certain Terms.
                        --------------------------------------

          The Company shall not consolidate with or merge into any other
Corporation or convey, transfer or lease its properties and assets substantially
as an entirety to any Person, unless

          (a) the Corporation formed by such consolidation or into which the
     Company is merged or the Person which acquires by conveyance or transfer,
     or which leases, the properties and assets of the Company substantially as
     an entirety shall be a Person organized and existing under the laws of the
     United States of America, any State thereof or the District of Columbia,
     and shall expressly assume, by an indenture supplemental hereto, executed
     and delivered to the Trustee, in form satisfactory to the Trustee, the due
     and punctual payment of the principal of and premium, if any, and interest,
     if any, on all Outstanding Securities and the performance of every covenant
     of this Indenture on the part of the Company to be performed or observed;

                                      -78-
<PAGE>
 
          (b) immediately after giving effect to such transaction and treating
     any indebtedness for borrowed money which becomes an obligation of the
     Company as a result of such transaction as having been incurred by the
     Company at the time of such transaction, no Event of Default, and no event
     which, after notice or lapse of time or both, would become an Event of
     Default, shall have occurred and be continuing; and

          (c) the Company, the Corporation formed by such consolidation or into
     which the Company is merged or the Person which acquires by conveyance or
     transfer shall have delivered to the Trustee an Officers' Certificate and
     an Opinion of Counsel, each stating that such consolidation, merger,
     conveyance, transfer or lease and such indenture supplemental hereto
     complies with this Article and that all conditions precedent herein
     provided for relating to such transactions have been complied with.

          Section 1102.  Successor Corporation Substituted.
                         --------------------------------- 

          Upon any consolidation by the Company with or merger by the Company
into any other Corporation or any conveyance, transfer or lease of the
properties and assets of the Company substantially as an entirety in accordance
with Section 1101, the successor Corporation formed by such consolidation or
into which the Company is merged or the Person to which such conveyance,
transfer or lease is made shall succeed to, and be substituted for, and may
exercise every right and power of, the Company under this Indenture with the
same effect as if such successor Person had been named as the Company herein,
and thereafter, except in the case of a lease, the predecessor Person shall be
relieved of all obligations and covenants under this Indenture and the
Securities Outstanding hereunder.


                                 ARTICLE TWELVE

                            Supplemental Indentures
                            -----------------------

          Section 1201.  Supplemental Indentures Without Consent
                         of Holders.
                         ---------------------------------------

          Without the consent of any Holders, the Company and the Trustee, at
any time and from time to time, may enter into one or more indentures
supplemental hereto, in form satisfactory to the Trustee, for any of the
following purposes:

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

          (b) to add to the covenants of the Company for the benefit of the
     Holders of all or any series of Securities,

                                      -79-
<PAGE>
 
     or any Tranche thereof (and if such covenants are to be for the benefit of
     less than all Securities, stating that such covenants are expressly being
     included solely for the benefit of such series or Tranche) or to surrender
     any right or power herein conferred upon the Company; or

          (c) to add any additional Events of Default with respect to all or any
     series of Securities Outstanding hereunder; or

          (d) to change or eliminate any provision of this Indenture or to add
     any new provision to this Indenture; provided, however, that if such
     change, elimination or addition shall materially and adversely affect the
     interests of the Holders of Securities of any series or Tranche, such
     change, elimination or addition shall become effective with respect to such
     series or Tranche only when no Security of such series or Tranche remains
     Outstanding; or

          (e) to provide collateral security for the Securities; or

          (f) to establish the form or terms of Securities of any series or
     Tranche as contemplated by Sections 201 and 301; or

          (g) to evidence and provide for the acceptance of appointment
     hereunder by a separate or successor Trustee with respect to the Securities
     of one or more series and to add to or change any of the provisions of this
     Indenture as shall be necessary to provide for or facilitate the
     administration of the trusts hereunder by more than one Trustee, pursuant
     to the requirements of Section 911(b); or

          (h) to provide for the procedures required to permit the Company to
     utilize, at its option, a non-certificated system registration for all, or
     any series or Tranche of, the Securities; or

          (i) to change any place or places where (1) the principal of and
     premium, if any, and interest, if any, on all or any series of Securities,
     or any Tranche thereof, shall be payable, (2) all or any series of
     Securities, or any Tranche thereof, may be surrendered for registration of
     transfer, (3) all or any series of Securities, or any Tranche thereof, may
     be surrendered for exchange and (4) notices and demands to or upon the
     Company in respect of all or any series of Securities, or any Tranche
     thereof, and this Indenture may be served; provided, however, that any such
     place is located in New York, New York, Birmingham, Alabama, Chicago,
     Illinois, Atlanta, Georgia, Jacksonville, Florida, Charlotte, North
     Carolina or Los Angeles, California or in any other city located in the
     United States

                                      -80-
<PAGE>
 
     of America which has a population of at least 1,000,000 inhabitants; or

          (j) to cure any ambiguity, to correct or supplement any provision
     herein which may be defective or inconsistent with any other provision
     herein, or to make any other provisions with respect to matters or
     questions arising under this Indenture, provided that such other provisions
     shall not adversely affect the interests of the Holders of Securities of
     any series or Tranche in any material respect.

          Without limiting the generality of the foregoing, if the Trust
Indenture Act shall be amended at any time or times after the date of the
execution and delivery of this Indenture and

              (x) if any such amendment shall require one or more changes to any
     provisions hereof or the incorporation herein of any additional provisions,
     or shall by operation of law be deemed to effect such changes or
     incorporate such provisions, this Indenture shall be deemed to have been
     amended so as to conform to such amendment to the Trust Indenture Act, and
     the Company and the Trustee may, without the consent of any Holders, enter
     into an indenture supplemental hereto to effect or evidence such changes or
     additional provisions; or

              (y) if any such amendment shall permit one or more changes to, or
     the elimination of, any provisions hereof which, at the date of the
     execution and delivery hereof, are required by the Trust Indenture Act to
     be contained herein, this Indenture shall be deemed to have been amended to
     effect such changes or elimination, and the Company and the Trustee may,
     without the consent of any Holders, enter into an indenture supplemental
     hereto to effect such changes or elimination; or

              (z) if, by reason of any such amendment, it shall be no longer
     necessary for this Indenture to contain one or more provisions which, at
     the date of the execution and delivery hereof, are required by the Trust
     Indenture Act to be contained herein, the Company and the Trustee may,
     without the consent of any Holders, enter into an indenture supplemental
     hereto to effect the elimination of such provisions.

              Section 1202.  Supplemental Indentures with Consent of
                             Holders.
                             ---------------------------------------

              With the consent of the Holders of not less than a majority in
aggregate principal amount of the Securities of all series then Outstanding
under this Indenture, considered as one class, by Act of said Holders delivered
to the Company and the Trustee, the Company, when authorized by a Board
Resolution, and

                                      -81-
<PAGE>
 
the Trustee may enter into an indenture or indentures supplemental hereto for
the purpose of adding any provisions to, or changing in any manner or
eliminating any of the provisions of, this Indenture; provided, however, that if
there shall be Securities of more than one series Outstanding hereunder and if a
proposed supplemental indenture shall directly affect the rights of the Holders
of Securities of one or more, but less than all, of such series, then the
consent only of the Holders of a majority in aggregate principal amount of the
Outstanding Securities of all series so directly affected, considered as one
class, shall be required; and provided, further, that if the Securities of any
series shall have been issued in more than one Tranche and if the proposed
supplemental indenture shall directly affect the rights of the Holders of
Securities of one or more, but less than all, of such Tranches, then the consent
only of the Holders of a majority in aggregate principal amount of the
Outstanding Securities of all Tranches so directly affected, considered as one
class, shall be required; and provided, further, that no such supplemental
indenture shall, without the consent of the Holder of each Outstanding Security
of each series or Tranche so directly affected,

          (a) change the Stated Maturity of the principal of, or any installment
of principal or interest on, any Security, or reduce the principal amount
thereof or the rate of interest thereon (or the amount of any installment of
interest thereon) or any premium payable upon the redemption thereof, or change
the method of calculating the rate of interest thereon, or reduce the amount of
the principal of an Original Issue Discount Security that would be due and
payable upon a declaration of acceleration of the Maturity thereof pursuant to
Section 802, or the coin or currency (or other property) in which, any Security
or any premium or the interest thereon is payable, or impair the right to
institute suit for the enforcement of any such payment on or after the Stated
Maturity thereof (or, in the case of redemption, on or after the Redemption
Date), or

          (b) reduce the percentage in principal amount of the Outstanding
Security of such series or Tranche, the consent of whose Holders is required for
any such supplemental indenture, or the consent of whose Holders is required for
any waiver of compliance with any provision of this Indenture or of any default
hereunder and its consequences, or reduce the requirements of Section 1304 for
quorum or voting, or

          (c) modify any of the provisions of this Section, Section 607 or
Section 813, except to increase the percentages in principal amount referred to
in this Section or such other Sections or to provide that other provisions of
this Indenture cannot be modified or waived without the consent of the Holder of
each Outstanding Security affected thereby; provided, however, that this clause
shall not be deemed to require the consent of any Holder with respect to changes
in the references to "the Trustee" and concomitant changes in this Section, or
the deletion

                                      -82-
<PAGE>
 
of this proviso, in accordance with the requirements of Sections 911(b) and
1201(g).

          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 of one or more
Tranches thereof, or which modifies the rights of the Holders of Securities of
such series or Tranches with respect to such covenant or other provision, shall
be deemed not to affect the rights under this Indenture of the Holders of
Securities of any other series or Tranche.

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

          Section 1203.  Execution of Supplemental Indentures.
                         ------------------------------------ 

          In executing, or accepting the additional trusts created by, any
supplemental indenture permitted by this Article or the modifications thereby of
the trusts created by this Indenture, the Trustee shall be entitled to receive,
and (subject to Section 901) shall be fully protected in relying upon, an
Opinion of Counsel stating that the execution of such supplemental indenture is
authorized or permitted by this Indenture.  The Trustee may, but shall not be
obligated to, enter into any such supplemental indenture which affects the
Trustee's own rights, duties, immunities or liabilities under this Indenture or
otherwise.

          Section 1204.  Effect of Supplemental Indentures.
                         --------------------------------- 

          Upon the execution of any supplemental indenture under this Article
this Indenture shall be modified in accordance therewith, and such supplemental
indenture shall form a part of  this Indenture for all purposes; and every
Holder of Securities theretofore or thereafter authenticated and delivered
hereunder shall be bound thereby.  Any supplemental indenture permitted by this
Article may restate this Indenture in its entirety, and, upon the execution and
delivery thereof, any such restatement shall supersede this Indenture as
theretofore in effect for all purposes.

          Section 1205.  Conformity With Trust Indenture Act.
                         ----------------------------------- 

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

                                      -83-
<PAGE>
 
          Section 1206.  Reference in Securities to Supplemental
                         Indentures.
                         ---------------------------------------

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

          Section 1207.  Modification Without Supplemental
                         Indenture.
                         ---------------------------------

          If the terms of any particular series of Securities shall have been
established in a Board Resolution or an Officers' Certificate pursuant to a
Board Resolution as contemplated by Section 301, and not in an indenture
supplemental hereto, additions to, changes in or the elimination of any of such
terms may be effected by means of a supplemental Board Resolution or Officers'
Certificate, as the case may be, delivered to, and accepted by, the Trustee;
provided, however, that such supplemental Board Resolution or Officers'
Certificate shall not be accepted by the Trustee or otherwise be effective
unless all conditions set forth in this Indenture which would be required to be
satisfied if such additions, changes or elimination were contained in a
supplemental indenture shall have been appropriately satisfied.  Upon the
acceptance thereof by the Trustee, any such supplemental Board Resolution or
Officers' Certificate shall be deemed to be a "supplemental indenture" for
purposes of Section 1204 and 1206.


                               ARTICLE THIRTEEN

                  Meetings of Holders; Action Without Meeting
                  -------------------------------------------

          Section 1301.  Purposes for Which Meetings
                         May Be Called.
                         ---------------------------

          A meeting of Holders of Securities of one or more, or all, series, or
any Tranche or Tranches thereof, may be called at any time and from time to time
pursuant to this Article to make, give or take any request, demand,
authorization, direction, notice, consent, waiver or other action provided by
this Indenture to be made, given or taken by Holders of Securities of such
series or Tranches.

                                      -84-
<PAGE>
 
          Section 1302.  Call, Notice and Place of Meetings.
                         ---------------------------------- 

          (a) The Trustee may at any time call a meeting of Holders of
Securities of one or more, or all, series, or any Tranche or Tranches thereof,
for any purpose specified in Section 1301, to be held at such time and at such
place in the Borough of Manhattan, The City of New York, as the Trustee shall
determine, or, with the approval of the Company, at any other place.  Notice of
every such meeting setting forth the time and place of such meeting and in
general terms the action proposed to be taken at such meeting, shall be given,
in the manner provided in Section 106, not less than 21 nor more than 180 days
prior to the date fixed for the meeting.

          (b) If the Trustee shall have been requested to call a meeting of the
Holders of Securities of one or more, or all, series, or any Tranche or Tranches
thereof, by the Company or by the Holders of 33% in aggregate principal amount
of all such series and Tranches, considered as one class, for any purpose
specified in Section 1301, by written request setting forth in reasonable detail
the action proposed to be taken at the meeting, and the Trustee shall not have
given the notice of such meeting within 21 days after receipt of such request or
shall not thereafter proceed to cause the meeting to be held as provided herein,
then the Company or the Holders of Securities of such series and Tranches in the
amount above specified, as the case may be, may determine the time and the place
in the Borough of Manhattan, The City of New York, or in such other place as
shall be determined or approved by the Company, for such meeting and may call
such meeting for such purposes by giving notice thereof as provided in
subsection (a) of this Section.

          (c) Any meeting of Holders of Securities of one or more, or all,
series, or any Tranche or Tranches thereof, shall be valid without notice if the
Holders of all Outstanding Securities of such series or Tranche are present in
person or by proxy and if representatives of the Company and the Trustee are
present, or if notice is waived in writing before or after the meeting by the
Holders of all Outstanding Securities of such series or Tranche, or by such of
them as are not present at the meeting in person or by proxy, and by the Company
and the Trustee.

          Section 1303.  Persons Entitled to Vote at Meetings.
                         ------------------------------------ 

          To be entitled to vote at any meeting of Holders of Securities of one
or more, or all, series, or any Tranche or Tranches thereof, a Person shall be
(a) a Holder of one or more Outstanding Securities of such series or Tranches,
or (b) a Person appointed by an instrument in writing as proxy for a Holder or
Holders of one or more Outstanding Securities of such series or Tranches by such
Holder or Holders.  The only Persons who shall be entitled to attend any meeting
of Holders of Securities of any series or Tranche shall be the Person entitled

                                      -85-
<PAGE>
 
to vote at such meeting and their counsel, any representatives of the Trustee
and its counsel and any representatives of the Company and its counsel.

          Section 1304.  Quorum; Action.
                         -------------- 

          The Persons entitled to vote a majority in aggregate principal amount
of the Outstanding Securities of the series and Tranches with respect to which a
meeting shall have been called as hereinbefore provided, considered as one
class, shall constitute a quorum for a meeting of Holders of Securities of such
series and Tranches; provided, however, that if any action is to be taken at
such meeting which this Indenture expressly provides may be taken by the Holders
of a specified percentage, which is less than a majority, in principal amount of
the Outstanding Securities of such series and Tranches, considered as one class,
the Persons entitled to vote such specified percentage in principal amount of
the Outstanding Securities of such series and Tranches, considered as one class,
shall constitute a quorum.  In the absence of a quorum within one hour of the
time appointed for any such meeting, the meeting shall, if convened at the
request of Holders of Securities of such series and Tranches, be dissolved.  In
any other case the meeting may be adjourned for a period of not less than 10
days as determined by the chairman of the meeting prior to the adjournment of
such meeting.  In the absence of a quorum at any such adjourned meeting, such
adjourned meeting may be further adjourned for a period of not less than 10 days
as determined by the chairman of the meeting prior to the adjournment of such
adjourned meeting.  Except as provided by Section 1305(e), notice of the
reconvening of any adjourned meeting shall be given as provided in Section
1302(a) not less than five days prior to the date on which the meeting is
scheduled to be reconvened.  Notice of the reconvening of an adjourned meeting
shall state expressly the percentage, as provided above, of the principal amount
of the Outstanding Securities of such series and Tranches which shall constitute
a quorum.

          Except as limited by Section 1202, any resolution presented to a
meeting or adjourned meeting duly reconvened at which a quorum is present as
aforesaid may be adopted only by the affirmative vote of the Holders of a
majority in aggregate principal amount of the Outstanding Securities of the
series and Tranches with respect to which such meeting shall have been called,
considered as one class; provided, however, that, except as so limited, any
resolution with respect to any action which this Indenture expressly provides
may be taken by the Holders of a specified percentage, which is less than a
majority, in principal amount of the Outstanding Securities of such series and
Tranches, considered as one class, may be adopted at a meeting or an adjourned
meeting duly reconvened and at which a quorum is present as aforesaid by the
affirmative vote of the Holders of such specified percentage in principal amount
of the Outstanding Securities of such series and Tranches, considered as one
class.

                                      -86-
<PAGE>
 
          Any resolution passed or decision taken at any meeting of Holders of
Securities duly held in accordance with this Section shall be binding on all the
Holders of Securities of the series and Tranches with respect to which such
meeting shall have been held, whether or not present or represented at the
meeting.

     Section 1305.  Attendance at Meetings; Determination of
                    Voting Rights; Conduct and Adjournment
                    of Meetings.
                    -----------------------------------------

          (a) Attendance at meetings of Holders of Securities may be in person
or by proxy; and, to the extent permitted by law, any such proxy shall remain in
effect and be binding upon any future Holder of Securities with respect to which
it was given unless and until specifically revoked by the Holder or future
Holder of such Securities before being voted.

          (b) Notwithstanding any other provisions of this Indenture, the
Trustee may make such reasonable regulations as it may deem advisable for any
meeting of Holders of Securities in regard to proof of the holding of such
Securities and of the appointment of proxies and in regard to the appointment
and duties of inspectors of votes, the submission and examination of proxies,
certificates and other evidence of the right to vote, and such other matters
concerning the conduct of the meeting as it shall deem appropriate.  Except as
otherwise permitted or required by any such regulations, the holding of
Securities shall be proved in the manner specified in Section 104 and the
appointment of any proxy shall be proved in the manner specified in Section 104.
Such regulations may provide that written instruments appointing proxies,
regular on their face, may be presumed valid and genuine without the proof
specified in Section 104 or other proof.

          (c) The Trustee shall, by an instrument in writing appoint a temporary
chairman of the meeting, unless the meeting shall have been called by the
Company or by Holders as provided in Section 1302(b), in which case the Company
or the Holders of Securities of the series and Tranches calling the meeting, as
the case may be, shall in like manner appoint a temporary chairman.  A permanent
chairman and a permanent secretary of the meeting shall be elected by vote of
the persons entitled to vote a majority in aggregate principal amount of the
Outstanding Securities of all series and Tranches represented at the meeting,
considered as one class.

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

                                      -87-
<PAGE>
 
          (e) Any meeting duly called pursuant to Section 1302 at which a quorum
is present may be adjourned from time to time by Persons entitled to vote a
majority in aggregate principal amount of the Outstanding Securities of all
series and Tranches represented at the meeting considered as one class; and the
meeting may be held as so adjourned without further notice.

          Section 1306.  Counting Votes and Recording Action of
                         Meetings.
                         --------------------------------------

          The vote upon any resolution submitted to any meeting of Holders shall
be by written ballots on which shall be subscribed the signatures of the Holders
or of their representatives by proxy and the principal amounts and serial
numbers of the Outstanding Securities, of the series and Tranches with respect
to which the meeting shall have been called, held or represented by them.  The
permanent chairman of the meeting shall appoint two inspectors of votes who
shall count all votes cast at the meeting for or against any resolution and who
shall make and file with the secretary of the meeting their verified written
reports of all votes cast at the meeting.  A record of the proceedings of each
meeting of Holders shall be prepared by the secretary of the meeting and there
shall be attached to said record the original reports of the inspectors of votes
on any vote by ballot taken thereat and affidavits by one or more persons having
knowledge of the facts setting forth a copy of the notice of the meeting and
showing that said notice was given as provided in Section 1302 and, if
applicable, Section 1304.  Each copy shall be signed and verified by the
affidavits of the permanent chairman and secretary of the meeting and one such
copy shall be delivered to the Company, and another to the Trustee to be
preserved by the Trustee, the latter to have attached thereto the ballots voted
at the meeting.  Any record so signed and verified shall be conclusive evidence
of the matters therein stated.

          Section 1307.  Action Without Meeting.
                         ---------------------- 

          In lieu of a vote of Holders at a meeting as hereinbefore contemplated
by this Article, any request, demand, authorization, direction, notice, consent,
waiver or other action may be made, given or taken by Holders by written
instruments as provided in Section 104.

          Section 1308.  Fixing of Record Date.
                         --------------------- 

          Anything in this Article to the contrary notwithstanding, the Company
may, but shall not be obliged to, fix a record date for the purpose of
determining the Holders of Securities entitled to attend and vote in person or
by proxy at a meeting of Holders of Securities held pursuant to this Article or
to consent to any modification, alteration or other action.  If a record date is
fixed, those persons who were Holders of Securities at the close of business of
the Trustee on such record

                                      -88-
<PAGE>
 
date (or their duly designated proxies), and only those Persons, shall be
entitled to attend and vote in person or by proxy at a meeting of Holders of
Securities held pursuant to this Article or to consent to such modification,
alteration or other action or to revoke any proxy or consent previously given,
whether or not such Persons continue to be Holders of Securities after such
record date.


                                ARTICLE FOURTEEN

                    Immunity of Incorporators, Stockholders,
                              Officers and Directors
                     ----------------------------------------

          Section 1401.  Liability Solely Corporate.
                         -------------------------- 

          No recourse shall be had for the payment of the principal of or
premium, if any, or interest, if any, on any Securities, or any part thereof, or
for any claim based thereon or otherwise in respect thereof, or of the
indebtedness represented thereby, or upon any obligation, covenant or agreement
under this Indenture, against any incorporator, stockholder, officer or
director, as such, past, present or future of the Company or of any predecessor
or successor Corporation (either directly or through the Company or a
predecessor or successor Corporation), whether by virtue of any constitutional
provision, statute or rule of law, or by the enforcement of any assessment or
penalty or otherwise; it being expressly agreed and understood that this
Indenture and all the Securities are solely corporate obligations, and that no
personal liability whatsoever shall attach to, or be incurred by, any
incorporator, stockholder, officer or director, past, present or future, of the
Company or of any predecessor or successor Corporation, either directly or
indirectly through the Company or any predecessor or successor Corporation,
because of the indebtedness hereby authorized or under or by reason of any of
the obligations, covenants or agreements contained in this Indenture or in any
of the Securities or to be implied herefrom or therefrom, and that any such
personal liability is hereby expressly waived and released as a condition of,
and as part of the consideration for, the execution of this Indenture and the
issuance of the Securities.

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

                                      -89-
<PAGE>
 
          IN WITNESS WHEREOF, the parties hereto have caused this Indenture to
be duly executed, and their respective corporate seals to be hereunto affixed
and attested, all as of the day and year first above written.


                                    ENERGEN CORPORATION


                                    By:  /s/ Wm. Michael Warren, Jr.
                                       --------------------------------------
                                       Name:  Wm. Michael Warren, Jr.
                                       Title: President


ATTEST:

/s/ J. David Woodruff, Jr.
- ---------------------------------- 



                                    THE BANK OF NEW YORK, as trustee


                                    By:  /s/ Sandra Carreker
                                       --------------------------------------
                                       Name:  Sandra Carreker
                                       Title: Agent


ATTEST:

/s/ William A. Lamm
- ---------------------------------- 

                                      -90-
<PAGE>
 
STATE OF ALABAMA    )
                    )  SS.:
COUNTY OF JEFFERSON )


          On the 17th day of September, 1996, before me personally came
W. Michael Warren, Jr., to me known, who, being by me duly sworn, did depose and
say that (s)he is a President of Energen Corporation, one of the corporations
described in and which executed the foregoing instrument; that (s)he knows the
seal of said corporation; that the seal affixed to said instrument is such
corporate seal; that it was so affixed by authority of the Board of Directors of
said corporation, and that (s)he signed his/her name thereto by like authority.

                                                 /s/ Margaret G. Priola
                                           -----------------------------------
                                                       Notary Public



STATE OF FLORIDA    )
                    )  SS.:
COUNTY OF DUVAL     )


          On the 13th day of September, 1996, before me personally came
Sandra Carreker, to me known, who, being by me duly sworn, did depose and
say that (s)he is a Agent of The Bank of New York, one of the corporations
described in and which executed the foregoing instrument; that (s)he knows the
seal of said corporation; that the seal affixed to said instrument is such
corporate seal; that it was so affixed by authority of the Board of Directors of
said corporation, and that (s)he signed his/her name thereto by like authority.

                                                   /s/ Deborah T. Daly
                                           -----------------------------------
                                                       Notary Public

                                      -91-

<PAGE>
 
                                                                       EXHIBIT 5



                               December 23, 1997



Energen Corporation
2101 Sixth Avenue North
Birmingham, Alabama  35203

Ladies and Gentlemen:

                In our capacity as counsel for Energen Corporation, an Alabama
corporation ("Energen"), we have examined the Registration Statement on Form S-3
(the "Registration Statement"), in the form as proposed to be filed by Energen
on December 24, 1997 with the Securities and Exchange Commission under the
provisions of the Securities Act of 1933, as amended, relating to up to
$400,000,000 of (i) its notes, debentures or other evidences of unsecured
indebtedness (the "Debt Securities") and (ii) its common stock, par value $.01
per share (the "Common Stock"). The Common Stock and the Debt Securities are
collectively referred to as the "Offered Securities." The Offered Securities are
to be offered by Energen to the public pursuant to the Registration Statement.
In this connection, we have examined such records, documents and proceedings as
we have deemed relevant and necessary as a basis for the opinions expressed
herein.

                Upon the basis of the foregoing, we are of the opinion that:

                (i) the Debt Securities to be offered under the Registration
        Statement, to the extent actually issued by Energen pursuant to the
        Selling Agency Agreement described in the Registration Statement (the
        "Selling Agency Agreement"), will be duly and validly authorized and
        issued, will be fully paid and non-assessable Debt Securities of
        Energen, and will constitute legal, valid and binding obligations of
        Energen in accordance with their terms;
   
                (ii) the Common Stock to be offered under the Registration
        Statement, to the extent actually issued by Energen pursuant to the
        Common Stock Underwriting Agreement described in the Registration
        Statement (the "Underwriting Agreement"), will be duly and validly
        authorized and issued and will be fully paid and nonassessable Common
        Stock of Energen; and

                (iii) under the laws of the State of Alabama, no personal
        liability will attach to the ownership of the Offered Securities of
        Energen.
 
                We hereby consent to the filing of this opinion with the
Securities and Exchange Commission as an exhibit to the Registration Statement.
In addition, we hereby consent to the inclusion of the statements made in
reference to our firm under the caption "LEGAL OPINIONS" in the Prospectus which
is a part of the Registration Statement.

                                       Yours very truly,


                                       /s/ Bradley Arant Rose & White LLP
 

<PAGE>
 
ENERGEN CORPORATION                                                   EXHIBIT 12
Computation of Ratio of Earnings to Fixed Charges
(In Thousands, Except for Ratios)

<TABLE>
<CAPTION>
                                                                 Years Ended September 30,

                                                    1997       1996        1995        1994        1993
                                                  -------     -------     -------     -------     -------
<S>                                               <C>         <C>         <C>         <C>         <C>
Earnings, as defined:

  Income from continuing operations
    before provision for income taxes  . . . .    $32,094     $26,589     $22,989     $30,362     $21,489

Add:
  Interest, net of amounts capitalized (1) . .     22,906      13,920      11,818      11,345      10,605
  Dividends on preferred stock of subsidiary .          0           0           0           0          70
                                                  -------     -------     -------     -------     -------

Total earnings, as defined . . . . . . . . . .    $55,000     $40,509     $34,807     $41,707     $32,164
                                                  =======     =======     =======     =======     =======

Fixed charges, as defined:

  Interest (1) . . . . . . . . . . . . . . . .    $22,906     $13,920     $11,818     $11,345     $10,605
  Dividends on preferred stock of subsidiary .          0           0           0           0          70
                                                  -------     -------     -------     -------     -------

Total fixed charges, as defined  . . . . . . .    $22,906     $13,920     $11,818     $11,345     $10,675
                                                  =======     =======     =======     =======     =======

Ratio of earnings to fixed charges . . . . . .       2.40        2.91        2.95        3.68        3.01
                                                  =======     =======     =======     =======     =======
</TABLE>

(1)  Includes amortization of debt discount and expense.


<PAGE>
 
 
                                                                   EXHIBIT 23(a)
                      CONSENT OF INDEPENDENT ACCOUNTANTS



We consent to the incorporation by reference in this Registration Statement on
Form S-3 (Registration No. __________) of Energen Corporation for the
registration of debt securities and common stock of Energen Corporation, of our
report, dated October 23, 1997, on our audits of the consolidated financial
statements and financial statement schedules of Energen Corporation as of
September 30, 1997 and 1996 and for the years ended September 30, 1997, 1996 and
1995. We also consent to the reference to our firm under the caption "Experts."


                                       /s/ Coopers & Lybrand L.L.P.

                                       COOPERS & LYBRAND L.L.P.

Birmingham, Alabama
December 23, 1997


<PAGE>
 
STATE OF ALABAMA      )                                               EXHIBIT 24
COUNTY OF JEFFERSON   )

                               POWER OF ATTORNEY
                       ($400,000,000 SHELF REGISTRATION)


           KNOW ALL MEN BY THESE PRESENTS, that each of the undersigned Officers
 and/or Directors of Energen Corporation, whose signatures appear below hereby
 constitutes and appoints Rex J. Lysinger, Wm. Michael Warren, Jr., and Geoffrey
 C. Ketcham, and each of them, his or her true and lawful attorneys-in-fact and
 agents, with full power of substitution and resubstitution, for him or her and
 in his or her name, place and stead, in any and all capacities, to sign a
 registration statement of Energen Corporation on Form S-3 relating to the
 offering of up to $400,000,000 aggregate amount of debt and/or equity
 securities of Energen Corporation, including all amendments to such
 registration statement, and to file the same, with all exhibits thereto, and
 other documents in connection therewith, with the Securities and Exchange
 Commission and with any state securities commission, granting unto said
 attorneys-in-fact and agents full power and authority to do and perform each
 and every act and thing requisite and necessary to be done in and about the
 premises, as fully to all intents and purposes as he or she might or could do
 in person, hereby ratifying and confirming all that said attorneys-in-fact and
 agents, or any of them, or their substitute or substitutes, may lawfully do or
 cause to be done by virtue hereof.

           Dated as of the 25th day of November, 1997.
 
 
/s/ STEPHEN D. BAN                     /s/ JULIAN W. BANTON
- ------------------------------         ------------------------------
STEPHEN D. BAN - Director              JULIAN W. BANTON - Director


/s/ R.D. CASH                          /s/ J. MASON DAVIS, JR. 
- ------------------------------         ------------------------------
R.D. CASH - Director                   J. MASON DAVIS, JR. - Director
 

/s/ JAMES S.M. FRENCH                  /s/ WALLACE L. LUTHY            
- ------------------------------         ------------------------------  
JAMES S.M. FRENCH - Director           WALLACE L. LUTHY - Director     


/s/ REX J. LYSINGER                    /s/ JUDY M. MERRITT
- ------------------------------         ------------------------------
REX J. LYSINGER - Director,            JUDY M. MERRITT - Director
Chairman of the Board


/s/ DRAYTON NABERS, JR.                /s/ GEORGE S. SHIRLEY          
- ------------------------------         ------------------------------ 
DRAYTON NABERS, JR. - Director         GEORGE S. SHIRLEY - Director    


/s/ WM. MICHAEL WARREN, JR.            /s/ G.C. KETCHAM
- ------------------------------         ------------------------------
WM. MICHAEL WARREN, JR.                G.C. KETCHAM - Executive Vice
Director and President and Chief       President, Chief Financial Officer
Operating Officer                      and Treasurer


<PAGE>

                                                                      EXHIBIT 25

 
                      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)(2)  '___'
                              __________________

                             THE BANK OF NEW YORK
              (Exact name of trustee as specified in its charter)

                                  13-5160382
                     (I.R.S. employer identification no.)

                   48 Wall Street, New York, New York  10286
             (Address of principal executive offices)  (Zip Code)
                              ___________________

                             The Bank of New York
                            10161 Centurion Parkway
                          Towermarc Plaza, 2nd Floor
                         Jacksonville, Florida  32256
                          Attn:  Ms. Sandra Carreker
                                (904) 998-4716
           (Name, address and telephone number of agent for service)
                             ____________________

                              ENERGEN CORPORATION
              (Exact name of obligor as specified in its charter)

                       Alabama                        63-0757759
           (State or other jurisdiction of           (IRS employer
            incorporation or organization)        identification no.)

              2101 Sixth Avenue North, Birmingham, Alabama 35203
                                (205) 326-2700
       (Address and telephone number of principal executive offices)   
                                  (Zip code)
                             ____________________

                                Debt Securities
                      (Title of the indenture securities)
<PAGE>
 
1.   General Information.
     -------------------

     Furnish the following information as to the trustee--

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

             Superintendent of Banks of the State of New York
             2 Rector Street
             New York, N.Y.  10006, and Albany, N.Y.  12203

             Federal Reserve Bank of New York
             33 Liberty Plaza
             New York, N.Y.  10045

             Federal Deposit Insurance Corporation
             Washington, D.C.  20429

             New York Clearing House Association
             New York, N.Y.

             Whether it is authorized to exercise corporate trust powers.

             Yes.


2.   Affiliations with Obligor.
     -------------------------

     If the obligor is an affiliate of the trustee, describe each such
     affiliation.

     None.  (See Note on page 4.)


16.  List of Exhibits.

     Exhibits identified in parentheses below, on file with the Commission, are
     incorporated herein by reference as an exhibit hereto, pursuant to Rule 7a-
     29 under the Trust Indenture Act of 1939 (the "Act") and Rule 24 of the
     Commission's Rules of Practice.

     (1) A copy of the Organization Certificate of the Bank of New York
     (formerly Irving Trust Company) as now in effect, which contains the
     authority to commence business and a grant of powers to exercise corporate
     trust powers. (Exhibit 1 to Amendment 1 to Form T-1 filed with 

<PAGE>
 
     Registration Statement No. 33-6215, Exhibits 1a and 1b to Form T-1 filed
     with Registration Statement No. 33-21672 and Exhibit 1 to Form T-1 filed
     with Registration Statement No. 33-29637.)

     (4) A copy of the existing By-laws of the Trustee. (Exhibit 4 to Form T-1
     filed with Registration Statement No. 33-31019.)

     (6) The consent of the Trustee required by Section 321(b) of the Act.
     (Exhibit 6 to Form T-1 filed with Registration No. 33-44051.)

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

                                     NOTE

Inasmuch as this Form T-1 is filed prior to the ascertainment by the Trustee of
all facts on which to base a responsive answer to Item 2, the answer to said
Item is based on incomplete information.

Item 2 may, however, be considered as correct unless amended by an amendment to
this Form T-1.

<PAGE>
 
                                   SIGNATURE


     Pursuant to the requirements of the Act, the Trustee, The Bank of New York,
a corporation organized and existing under the laws of the State of New York,
has duly caused this statement of eligibility to be signed on its behalf by the
undersigned, thereunto duly authorized, all in the City of Jacksonville and the
State of Florida, on the 19th day of December, 1997.


                                       THE BANK OF NEW YORK


                                       By: /s/ Tammy Stegall
                                           ___________________________
                                           Tammy Stegall, Agent
<PAGE>
 
                             EXHIBIT 6 TO FORM T-1

                              CONSENT OF TRUSTEE


     Pursuant to the requirements of Section 321(b) of the Trust Indenture Act
of 1939, in connection with the proposed issuance of Energen Corporation Debt
Securities, The Bank of New York hereby consents that reports of examinations by
Federal, State, Territorial or District Authorities may be furnished by such
authorities to the Securities and Exchange Commission upon request therefor.


                                       THE BANK OF NEW YORK

                                       By: /s/ Tammy Stegall
                                           __________________________
                                           Tammy Stegall, Agent
<PAGE>
 
                             EXHIBIT 7 TO FORM T-1

                      Consolidated Report of Condition of
                             THE BANK OF NEW YORK
                   of 48 Wall Street, New York, N.Y.  10286

     And Foreign and Domestic Subsidiaries, a member of the Federal Reserve
System, at the close of business June 30, 1996, published in accordance with a
call made by the Federal Reserve Bank of this District pursuant to the
provisions of the Federal Reserve Act.
<TABLE>
<CAPTION>
 
                                                                  Dollar Amounts
                                                                    in Thousands
ASSETS
- ------
<S>                                           <C>                  <C>
 
Cash and balances due from
     depository institutions:
     Noninterest-bearing balances
       and currency and coin                                        $ 3,650,068
     Interest-bearing balances                                          738,260
     Securities:                                                           
     Held-to-maturity securities                                        784,969
     Available-for-sale securities                                    2,033,407
Federal funds sold and securities                                          
     purchased under agreements to resell                                  
     in domestic offices of the bank:                                      
     Federal funds sold                                               3,699,232
     Securities purchased under                                            
       agreements to resell                                              20,000
Loans and lease financing receivables:
     Loans and leases,
       net of unearned income                 27,521,958
     LESS: Allowance for loan and
       lease losses                              586,658
     LESS: Allocated transfer
       risk reserve                                  429
     Loans and leases, net of unearned
       income and allowance and reserve                              27,521,958
</TABLE> 
 

<PAGE>
 
<TABLE> 
<S>                                           <C>                  <C>

Assets held in trading accounts                                         678,844
Premises and fixed assets (including                                         
     capitalized leases)                                                608,217
Other real estate owned                                                  50,599
Investments in unconsolidated                                                
     subsidiaries and associated                                             
     companies                                                          235,670
Customers' liability to this bank                                          
     on acceptances outstanding                                         904,948
Intangible assets                                                       450,230
Other assets                                                          1,299,464
                                                                     ----------
Total assets                                                        $42,675,866
                                                                     ========== 
 

LIABILITIES
- ----------- 

Deposits:
     In domestic offices                                            $19,223,050
     Noninterest-bearing                       7,675,758
     Interest-bearing                         11,547,292
     In foreign offices, Edge and
       Agreement subsidiaries, and IBFs                              11,527,685
     Noninterest-bearing                          48,502
     Interest-bearing                         11,479,183
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 IBFs:
     Federal funds purchased                                          1,498,351
     Securities sold under agreements                                          
       to repurchase                                                    126,974
Demand notes issued to the                                                     
     U.S. Treasury                                                      231,865
Trading liabilities                                                     479,390
Other borrowed money:                                                          
     With original maturity of one year                                        
       or less                                                        2,521,578
     With original maturity of more                                            
       than one year                                                     20,780
 
</TABLE> 

<PAGE>
 
<TABLE> 
<S>                                                                  <C> 
Bank's liability on acceptances
       executed and outstanding                                         905,850
Subordinated notes and debentures                                     1,020,400
Other liabilities                                                     1,543,657
                                                                     ----------
Total liabilities                                                    39,099,580
                                                                     ==========
 

EQUITY CAPITAL
- --------------
 
Common stock                                                            942,284 
Surplus                                                                 525,666 
Undivided profits and capital                                                   
     reserves                                                         2,124,231 
Net unrealized holding gains (losses)                                           
     on available-for-sale securities                                    (8,063)
Cumulative foreign currency                                                     
     translation adjustments                                             (7,832)
                                                                     ----------
Total equity capital                                                  3,576,286
                                                                     ----------
Total liabilities and equity capital                                $42,675,866 
                                                                    ===========

</TABLE>


     I, Robert E. Keilman, Senior Vice President and Comptroller 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.

                                                     Robert E. Keilman


     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 is true and
correct.


     J. Carter Bacot  )
     Thomas A. Renyi  )  Directors
     Alan R. Griffith )



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