INDIANA GAS CO INC
8-K, EX-4, 2000-12-27
NATURAL GAS DISTRIBUTION
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                          FIFTH SUPPLEMENTAL INDENTURE

                                       TO

                     INDENTURE DATED AS OF FEBRUARY 1, 1991

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


                           INDIANA GAS COMPANY, INC.,
                                     Issuer

                                       TO

                      U.S. BANK TRUST NATIONAL ASSOCIATION,
                                     Trustee

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


                          Dated as of December 28, 2000

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


                     7.15% INSURED QUARTERLY NOTES DUE 2015

                     7.45% INSURED QUARTERLY NOTES DUE 2030

<PAGE>
                                Table of Contents

                                                                            Page
                                                                            ----
                                    ARTICLE 1
           Form and Terms of Insured Quarterly Notes Due 2015 and 2030

 SECTION 101.  Definitions....................................................2
 SECTION 102.  Establishment..................................................3
 SECTION 103.  Payment of Principal and Interest..............................4
 SECTION 104.  Denominations..................................................5
 SECTION 105.  Global Securities..............................................5
 SECTION 106.  Transfer and Exchange..........................................6
 SECTION 107.  Redemption at the Company's Option.............................6
 SECTION 108.  Special Redemption at the Holders' Option......................6

                                    ARTICLE 2
                          Special Insurance Provisions

 SECTION 201.  Consent of Insurer............................................10
 SECTION 202.  Events of Default and Remedies................................10
 SECTION 203.  Notices/Information to be Given to Insurer....................10
 SECTION 204.  Insurance Policy Payment Procedures...........................11
 SECTION 205.  Special Rules Regarding Trustee...............................13
 SECTION 206.  Application of Term "Outstanding" to IQ Notes.................14
 SECTION 207.  Insurer as Third Party Beneficiary............................14
 SECTION 208.  Concerning the Special Insurance Provisions...................14

                                    ARTICLE 3
                            Miscellaneous Provisions

 SECTION 301.  Ratification and Incorporation of Original Indenture..........14
 SECTION 302.  Acceptance of Trust...........................................14
 SECTION 303.  Recitals by Company...........................................14
 SECTION 304.  Amendments....................................................14
 SECTION 305.  Executed in Counterparts......................................15


EXHIBIT A - Form of 15-Year IQ Note
EXHIBIT B - Form of 30-Year IQ Note
EXHIBIT C - Form of Redemption Request


<PAGE>

                  THIS FIFTH  SUPPLEMENTAL  INDENTURE,  dated as of December 28,
2000, by and between  INDIANA GAS COMPANY,  INC., a corporation  incorporated in
Indiana and Ohio, 1630 North Meridian Street,  Indianapolis,  Indiana 46202-1496
(the  "Company"),  and U.S. BANK TRUST NATIONAL  ASSOCIATION  (formerly known as
First Trust  National  Association,  which was formerly known as Bank of America
Illinois, which was formerly known as Continental Bank, National Association), a
national  banking  corporation duly organized and existing under the laws of the
United  States of America,  having its principal  corporate  trust office at 111
East Wacker Drive, Suite 300, Chicago, Illinois 60601 (the "Trustee").

                              W I T N E S S E T H:

                  WHEREAS,  the Company has entered into an Indenture,  dated as
of  February  1,  1991  (as  amended  prior to the date  hereof,  the  "Original
Indenture",   and  together  with  this  Fifth   Supplemental   Indenture,   the
"Indenture"),  with the Trustee to provide for the issuance from time to time of
the Company's  unsecured  debentures,  notes or other  evidences of indebtedness
(the "Securities"), to be issued in one or more series;

                  WHEREAS, Section 901 of the Original Indenture provides, among
other  things,  that the  Company  and the  Trustee  may enter  into  indentures
supplemental to the Original  Indenture for, among other things,  the purpose of
establishing  the form or terms of the  Securities of any series as permitted in
Sections 201 and 301 of the Original Indenture;

                  WHEREAS,  the  Company  by  corporate  action  duly  taken has
authorized  the issuance of two series of  Securities,  the 15-Year IQ Notes and
the 30-Year IQ Notes (as defined below), to contain such provisions as have been
determined  by the  Board of  Directors  of the  Company  (or a duly  authorized
committee thereof), including certain provisions required in connection with the
issuance of a financial  guaranty  insurance policy with respect to both series,
and as are set forth in this Fifth Supplemental Indenture;

                  WHEREAS,  all conditions  have been complied with, all actions
have been taken and all things  have been done which are  necessary  to make the
15-Year IQ Notes and the  30-Year IQ Notes,  when  executed  by the  Company and
authenticated  by or on behalf of the Trustee,  and when delivered as herein and
in the Original Indenture provided,  the valid obligations of the Company and to
make  this  Fifth  Supplemental  Indenture  a  valid  and  binding  supplemental
indenture to the Original Indenture;

                  NOW, THEREFORE, for and in consideration of the agreements and
obligations  set forth  herein  and the  purchase  of the  15-Year  IQ Notes and
30-Year IQ Notes by the Holders (as defined in the  Original  Indenture),  it is
mutually  covenanted and agreed, for the equal and proportionate  benefit of all
Holders of the 15-Year IQ Notes and the 30-Year IQ Notes, as follows:
<PAGE>

                                    ARTICLE 1

                       Form and Terms of Insured Quarterly
                             Notes Due 2015 and 2030

          SECTION 101. Definitions.  For all purposes of this Fifth Supplemental
Indenture,  except as otherwise herein expressly  provided or unless the context
otherwise requires:

                    (i) except as  otherwise  expressly  provided  or unless the
          context otherwise requires,  "Fifth Supplemental Indenture" means this
          instrument  as  originally  executed  or, if amended  or  supplemented
          pursuant to the applicable provisions of the Indenture,  as so amended
          or supplemented;

                    (ii) terms used  herein in  capitalized  form and defined in
          the Original Indenture, as supplemented to the date hereof, shall have
          the meanings specified in the Original Indenture;

                    (iii) the words  "herein",  "hereof"  and "hereto" and other
          words of  similar  import  used in this Fifth  Supplemental  Indenture
          refer to this Fifth  Supplemental  Indenture as a whole and not to any
          particular  section or other  subdivision  of this Fifth  Supplemental
          Indenture; and

                    (iv) the  provisions  of this Fifth  Supplemental  Indenture
          shall be read in  conjunction  with  the  provisions  of the  Original
          Indenture only with respect to the 15-Year IQ Notes and the 30-Year IQ
          Notes  and the  provisions  of the  Original  Indenture  shall  not be
          modified  by this Fifth  Supplemental  Indenture  with  respect to any
          other series of Securities  Outstanding or to be Outstanding under the
          Original Indenture.

          The  following  defined  terms used  herein  shall  have the  meanings
specified below:

          "15-Year  IQ Notes"  shall have the meaning  specified  in Section 102
hereof.

          "30-Year IQ Notes"  shall have the  meanings  specified in Section 102
hereof.

          "Beneficial  Owner"  shall have the meaning  specified  in Section 108
hereof.

          "Business Day" means any day, other than a Saturday or Sunday, that is
neither a legal holiday nor a day on which  commercial  banks are  authorized or
required by law, regulation or executive order to close in The City of New York.

          "Estate  Redemption Date" shall have the meaning  specified in Section
204(a) hereof.

          "IQ Notes" shall have the meaning specified in Section 102 hereof.

          "Indenture" shall have the meaning specified in the Recitals hereof.

          "Initial  Period"  shall have the  meaning  specified  in Section  108
hereof.

          "Insurance Trustee" means the United States Trust Company of New York,
in New York, New York, or any successor thereto,  as the Insurance Trustee under
the Policy.

          "Insurer" means Ambac  Assurance  Corporation,  a  Wisconsin-domiciled
stock insurance corporation.

          "Interest  Payment  Dates"  means March 15, June 15,  September 15 and
December 15 of each year, beginning on March 15, 2001.

          "Maturity  Date" shall mean the date on which the  principal  of an IQ
Note or an installment of principal becomes due and payable as herein or therein
provided, whether at Stated Maturity or by declaration of acceleration, call for
redemption by the Company,  notice of exercise of the redemption option referred
to in Section 108 hereof, or otherwise.

          "Original  Indenture" shall have the meaning specified in the Recitals
hereof.

          "Original Issue Date" means December 28, 2000 with respect to both the
15-Year IQ Notes and the 30-Year IQ Notes.

          "Participant" shall have the meaning specified in Section 108 hereof.

          "Policy" means the financial  guaranty  insurance policy issued by the
Insurer with respect to scheduled payments due for principal of and interest on,
and mandatory redemption payments pursuant to Section 108 hereof on, the 15-Year
IQ Notes and the 30-Year IQ Notes, as provided in such policy.

          "Redemption  Request" shall have the meaning  specified in Section 108
hereof.

          "Regular  Record Date" means,  with respect to each  Interest  Payment
Date,  the close of business on the 1st  calendar day of the month in which such
Interest Payment Date falls.

          "Representative"  shall have the  meaning  specified  in  Section  108
hereof.

          "Stated  Maturity" means December 15, 2015, in the case of the 15-Year
IQ Notes, and December 16, 2030, in the case of the 30-Year IQ Notes.

          "Subsequent  Period"  shall have the meaning  specified in Section 108
hereof.

          SECTION 102. Establishment. There are hereby established two series of
Securities  to be issued  under the  Indenture,  designated  as the "Indiana Gas
Company, Inc. 7.15% Insured Quarterly Notes due December 15, 2015" (the "15-Year
IQ Notes") and the "Indiana Gas Company,  Inc. 7.45% Insured Quarterly Notes due
December 16, 2030" (the "30-Year IQ Notes") (each referred to herein as a series
of IQ Notes, and collectively as the "IQ Notes").

          There are to be  authenticated  and  delivered  $20,000,000  aggregate
principal amount of 15-Year IQ Notes and $50,000,000  aggregate principal amount
of 30-Year IQ Notes,  and no further  15-Year IQ Notes or 30-Year IQ Notes shall
be  authenticated  and  delivered  except as otherwise  provided in the Original
Indenture.

          Each  series  of  IQ  Notes  shall  be  issued  as a  Global  Security
registered in the name of The Depository Trust Company (the "Depositary") or its
nominee and which shall  represent,  and shall be denominated in an amount equal
to the aggregate  principal  amount of, all Outstanding IQ Notes of such series,
except as otherwise  provided in Section 105 hereof.  The 15-Year IQ Notes shall
be in substantially  the form set forth in Exhibit A hereto,  and the 30-Year IQ
Notes shall be in substantially the form set forth in Exhibit B hereto.

          Each  series  of IQ Notes  shall be dated  the date of  authentication
thereof and shall bear  interest  from the Original  Issue Date or from the most
recent  Interest  Payment Date to which  interest has been paid or duly provided
for, as more fully set forth below.

          SECTION 103.  Payment of Principal and Interest.  The unpaid principal
amount of each series of IQ Notes  shall bear  interest at the per annum rate of
7.15% with  respect  to the  15-Year  IQ Notes,  and 7.45%  with  respect to the
30-Year IQ Notes,  until paid or duly provided for. The following terms apply to
each series of IQ Notes, respectively:

          Interest shall be paid  quarterly in arrears on each Interest  Payment
Date commencing on the Interest  Payment Date next succeeding the Original Issue
Date and, if applicable,  on the Maturity  Date.  Payments of interest on the IQ
Notes will  include  interest  accrued  from,  and  including,  the  immediately
preceding Interest Payment Date to which interest has been paid or duly provided
for (or from,  and  including,  the Original  Issue Date if no interest has been
paid or duly provided for) to, but excluding,  the applicable  Interest  Payment
Date or the  Maturity  Date,  as the case may be.  Interest  payments for the IQ
Notes shall be computed  and paid on the basis of a 360-day year  consisting  of
twelve 30-day months.

          The interest so payable and  punctually  paid or duly  provided for on
any  Interest  Payment  Date  will be paid to the  Holder(s)  thereof  as of the
Regular  Record Date for such Interest  Payment Date.  Any such interest that is
not so punctually  paid or duly  provided for on any Interest  Payment Date will
forthwith  cease to be payable to the  Holders  of the  particular  series of IQ
Notes as of the close of business on such Regular  Record Date and may either be
paid to the Person or Persons in whose name such IQ Notes are  registered at the
close of  business on a Special  Record  Date for the payment of such  defaulted
interest to be fixed by the Trustee, notice whereof shall be given to Holders of
the particular series of IQ Notes by the Trustee not less than ten (10) calendar
days  prior to such  Special  Record  Date,  or be paid at any time in any other
lawful manner, all as more fully provided in the Original Indenture.

          Payment of the  principal  of and any  interest on the IQ Notes due on
the Maturity Date shall be made in immediately  available funds, in such coin or
currency  of the  United  States of  America  as at the time of payment is legal
tender for payment of public and private debts,  upon presentation and surrender
of the applicable IQ Notes at the office or agency maintained by the Company for
that purpose in the Borough of  Manhattan,  The City of New York,  currently the
office of the Trustee located at 100 Wall Street, Suite 2000, New York, New York
10005,  or at such other paying agency in the Borough of Manhattan,  The City of
New York, as the Company may determine;  provided, however, that if the Maturity
Date falls on or after an Interest  Payment  Date then  Holders  presenting  and
surrendering  IQ Notes on the  Maturity  Date will only be  entitled to interest
accruing on or after such Interest Payment Date.  Payment of interest due on any
Interest  Payment  Date  other  than  the  Maturity  Date  will  be  made at the
aforementioned  office or agency  maintained by the Company or, at the option of
the Company,  (i) by check mailed to the address of the Person entitled  thereto
as such address shall appear in the Security Register  maintained by the Trustee
or (ii) by wire  transfer of  immediately  available  funds at such place and to
such account at a banking  institution in the United States as may be designated
in wire  transfer  instructions  received  in  writing  by the  Trustee at least
sixteen (16) days prior to such Interest  Payment  Date.  Any such wire transfer
instructions  received by the Trustee  shall remain in effect  until  revoked by
such Holder.

          In the event that any Interest Payment Date or the Maturity Date falls
on a day that is not a Business  Day, the required  payment of principal  and/or
interest payable on such date shall be made on the next succeeding  Business Day
except that,  if such  Business  Day is in the next  succeeding  calendar  year,
payment shall be made on the  immediately  preceding  Business Day, in each case
with the same force and effect as if made on the date such  payment was due, and
no interest  shall  accrue with  respect to such payment for the period from and
after such  Interest  Payment Date or the Maturity  Date, as the case may be, to
the date of such payment on the next succeeding Business Day.

          SECTION 104.  Denominations.  Each series of IQ Notes may be issued in
minimum denominations of $1,000 and any integral multiples thereof.

          SECTION 105. Global Securities. Each series of IQ Notes will be issued
in the  form of one or more  Global  Securities  registered  in the  name of the
Depositary  or its  nominee.  Beneficial  Owners  of  interests  in such  Global
Securities  will not be considered the Holders thereof for any purpose under the
Indenture.  Except under the limited  circumstances  described  below, no Global
Security representing an IQ Note shall be exchangeable except for another Global
Security  of like  denomination  and tenor to be  registered  in the name of the
Depositary  or  its  nominee  or a  successor  Depositary  or its  nominee,  and
interests  in the IQ  Notes  represented  by the  Global  Security  will  not be
exchangeable   for,  and  will  not  otherwise  be  issuable  as,  IQ  Notes  in
certificated form. The Global Securities  described above may not be transferred
except by the  Depositary to a nominee of the  Depositary or by a nominee of the
Depositary  to the  Depositary  or another  nominee of the  Depositary or by the
Depositary  or any such nominee to a successor  Depositary  or its nominee.  The
rights of Holders of a Global  Security  shall be  exercised  only  through  the
Depositary.

          A Global Security shall be exchangeable for individual IQ Notes of the
same series and of like tenor and terms in certificated form and in an aggregate
principal  amount  equal  to the  principal  amount  of  such  Global  Security,
registered in the names of Persons other than the Depositary or its nominee only
if (i) the  Depositary  notifies the Company that it is at any time unwilling or
unable to continue as Depositary for such Global Security, or if at any time the
Depositary  shall no longer be eligible or in good standing under the Securities
Exchange Act of 1934, as amended,  or other  applicable  statute or  regulation,
and, in either case, no successor  Depositary  shall have been  appointed by the
Company  within  ninety  (90) days after the  Company  receives  such  notice or
becomes aware of such ineligibility,  (ii) if the Company in its sole discretion
determines at any time that such Global  Security shall be so  exchangeable  and
delivers to the Trustee a Company  Order to the effect  thereto,  or (iii) there
shall have occurred and be continuing a default by the Insurer under the Policy.
Any Global  Security that is  exchangeable  pursuant to the  preceding  sentence
shall be  exchangeable  for individual  certificated  IQ Notes of the applicable
series registered in such names as the Depositary shall direct.

          SECTION 106. Transfer and Exchange. No service charge will be made for
any transfer or exchange of IQ Notes,  provided,  however,  that the Company may
require  payment  of a sum  sufficient  to cover  any tax or other  governmental
charge that may be imposed in connection with the transfer or exchange.

          The Company shall not be required (a) to issue,  register the transfer
of or exchange any IQ Notes of a series during a period beginning at the opening
of  business  fifteen  (15)  days  before  the day of the  mailing  of a  notice
identifying  the serial  numbers  of the IQ Notes of such  series  selected  for
redemption under the Indenture and ending at the close of business on the day of
the  mailing,  or (b) to register  the  transfer of or exchange  any IQ Notes so
selected for redemption in whole or in part,  except the  unredeemed  portion of
any IQ Note being redeemed in part.

          SECTION 107.  Redemption  at the Company's  Option.  Each series of IQ
Notes shall be subject to redemption  at the option of the Company,  in whole or
in part,  without  premium  or  penalty,  at any time or from time to time on or
after  December 15, 2004, in the case of the 15-Year IQ Notes,  and December 15,
2005,  in the case of the 30-Year IQ Notes,  in each case at a Redemption  Price
equal to 100% of the principal  amount to be redeemed  plus any unpaid  interest
accrued to the Redemption Date.

          In the event of redemption of a series of IQ Notes in part only, a new
IQ Note or Notes of such series for the unredeemed portion will be issued in the
name or  names  of the  Holders  thereof  upon the  presentation  and  surrender
thereof, as set forth in Section 1103 of the Original Indenture.

          The IQ Notes will not have a sinking fund.

          Notice of redemption shall be given as provided in Section 1104 of the
Original Indenture.

          Any  redemption  of less than all of a series of IQ Notes shall,  with
respect to the principal thereof, be divisible by $1,000.

          SECTION 108. Special Redemption at the Holders' Option. With regard to
IQ Notes of any series, a "Beneficial  Owner" means the Person who has the right
to sell,  transfer  or  otherwise  dispose of an  interest in an IQ Note and the
right to receive the proceeds  therefrom  as well as the interest and  principal
payable to the  Holder  thereof.  In  general,  a  determination  of  beneficial
ownership  in the IQ  Notes  will  be  subject  to the  rules,  regulations  and
procedures governing the Depositary and institutions that have accounts with the
Depositary or a nominee thereof ("Participants").

          Unless the  applicable  series of IQ Notes has been  declared  due and
payable  prior to their  Stated  Maturity  following  an Event of  Default  with
respect to such series, the Representative of a deceased  Beneficial Owner of IQ
Notes of such  series has the right to require the Company to redeem all or part
of such  Beneficial  Owner's  interest in such series of IQ Notes,  expressed in
integral multiples of $1,000 principal amount,  prior to Stated Maturity at 100%
of the principal  amount to be redeemed plus any unpaid interest  accrued to the
date of payment, and the Company will redeem the same subject to the limitations
that the Company  will not be  obligated  to redeem,  during the period from the
Original  Issue Date  through and  including  December  15,  2001 (the  "Initial
Period"),  and during any  twelve-month  period which ends on and includes  each
December 15 thereafter (each such twelve-month period being hereinafter referred
to as a "Subsequent Period"), as follows:

                    (i) with  respect to the 15-Year IQ Notes:  (1) on behalf of
          an individual deceased Beneficial Owner, any ownership interest in the
          15-Year IQ Notes which exceeds a total principal amount of $25,000, or
          (2) ownership interests in the 15-Year IQ Notes of all Representatives
          of deceased Beneficial Owners so requesting redemption in an aggregate
          principal amount exceeding $600,000; and

                    (ii) with respect to the 30-Year IQ Notes:  (1) on behalf of
          an individual deceased Beneficial Owner, any ownership interest in the
          30-Year IQ Notes which exceeds a total principal amount of $25,000, or
          (2)   ownership   interests   in  the   30-Year   IQ  Notes   for  all
          Representatives of deceased Beneficial Owners so requesting redemption
          in an aggregate principal amount exceeding $1,500,000.

          The Company  may, at its  option,  redeem an interest of any  deceased
Beneficial  Owner of IQ Notes in the Initial Period or any Subsequent  Period in
excess of the $25,000 individual  limitation applicable to each series. Any such
redemption,  to the extent that it exceeds  the  $25,000  per series  individual
limitation  for any  deceased  Beneficial  Owner,  shall not be  included in the
computation of the $600,000 aggregate limitation,  in the case of the 15-Year IQ
Notes,  or the $1,500,000  aggregate  limitation,  in the case of the 30-Year IQ
Notes for such Initial Period or such Subsequent  Period, as the case may be, or
for any  succeeding  Subsequent  Period.  The  Company  also may, at its option,
redeem  interests  of  deceased  Beneficial  Owners of IQ Notes,  in the Initial
Period or any Subsequent  Period,  in an aggregate  principal  amount  exceeding
$600,000, in the case of the 15-Year IQ Notes, or $1,500,00,  in the case of the
30-Year IQ Notes. Any such  redemption,  to the extent it exceeds such aggregate
limitation for the applicable series of IQ Notes, shall not reduce the aggregate
limitation for such series for any Subsequent Period.

          With  respect  to each  series of IQ  Notes,  subject  to the  $25,000
individual  limitation and the aggregate principal amount limitation  applicable
to such series for the Initial Period and each  Subsequent  Period,  the Company
will redeem the interest of such Beneficial Owner in the IQ Notes within 60 days
following  receipt by the Company of a Redemption  Request from the Trustee.  If
Redemption  Requests  with respect to a series of IQ Notes exceed the  aggregate
principal amount of interests  required to be redeemed during the Initial Period
or any Subsequent Period,  then such excess Redemption  Requests will be applied
in  the  order  received  by  the  Trustee  to  successive  Subsequent  Periods,
regardless  of  the  number  of  Subsequent  Periods  required  to  redeem  such
interests.  With respect to each series of IQ Notes, the Company may at any time
notify the Trustee that it will redeem, on a date not less than 30 nor more than
60 days thereafter,  all or any such principal amount of IQ Notes of such series
for which Redemption Requests have been received but which are not then eligible
for redemption by reason of the $25,000 individual  limitation or the applicable
aggregate limitation. Any IQ Notes so redeemed shall be redeemed in the order of
receipt of Redemption Requests by the Trustee.

          A  request  for  redemption  of an  interest  in the IQ  Notes  may be
initiated  at any time and in any  principal  amount in  integral  multiples  of
$1,000 by the personal  representative  or other Person  authorized to represent
the estate of the deceased  Beneficial Owner or from a surviving joint tenant(s)
or  tenant(s)  by the  entirety  of, or the trustee of a trust for, the deceased
Beneficial Owner (each, a "Representative").  The Representative shall deliver a
request to the Participant through whom the deceased Beneficial Owner owned such
interest, in form satisfactory to the Participant, together with evidence of the
death of the Beneficial Owner,  evidence of the authority of the  Representative
satisfactory to the Participant, such waivers, notices or certificates as may be
required  under  applicable  state or federal law and such other evidence of the
right to such  redemption as the  Participant  shall require.  The request shall
specify the series and principal of the interest in the IQ Notes to be redeemed.
The  Participant  shall  thereupon  deliver  to the  Depositary  a  request  for
redemption  substantially  in the form  attached as Exhibit C hereto  (each such
request, a "Redemption Request").

          The Depositary will, on receipt of a Redemption  Request,  forward the
same to the  Trustee.  The  Trustee  shall  maintain  records  with  respect  to
Redemption  Requests received by it, including date of receipt,  the name of the
Participant filing the Redemption Request and the status of each such Redemption
Request with respect to the $25,000  individual  limitation  and the  applicable
aggregate limitation applicable to the series of IQ Notes to be redeemed for the
applicable  Initial Period or Subsequent  Period.  The Trustee will  immediately
file with the Company each  Redemption  Request it receives,  together  with the
information  regarding  the  eligibility  thereof  with  respect to the  $25,000
individual limitation and the applicable aggregate  limitation.  The Depositary,
the  Company  and the  Trustee  may  conclusively  assume,  without  independent
investigation, that the statements contained in each Redemption Request are true
and  correct  and shall  have no  responsibility  for  reviewing  any  documents
submitted to the Participant by the  Representative  or for determining  whether
the applicable  decedent is in fact the Beneficial  Owner of the interest in the
IQ Notes to be redeemed or is in fact deceased and whether the Representative is
duly  authorized to request  redemption on behalf of the  applicable  Beneficial
Owner.

          The price to be paid by the  Company  for the IQ Notes to be  redeemed
pursuant to a Redemption  Request is 100% of the principal  amount  thereof plus
any unpaid interest accrued to the date of payment. Subject to arrangements with
the  Depositary,  payment for interests in the IQ Notes which are to be redeemed
shall be made to the Depositary upon presentation of IQ Notes to the Trustee for
redemption  in the  aggregate  principal  amount  specified  in  the  Redemption
Requests submitted to the Trustee by the Depositary which are to be fulfilled in
connection with such payment.

          The principal  amount of any IQ Notes of a series acquired or redeemed
by the Company other than by redemption at the option of any Representative of a
deceased  Beneficial Owner pursuant to this Section 108 shall not be included in
the  computation of either the $25,000  individual  limitation or the applicable
aggregate  principal amount limitation for such series for the Initial Period or
for any Subsequent Period.

          For  purposes of this  Section  108, an interest in an IQ Note held in
tenancy by the entirety, joint tenancy or by tenants in common will be deemed to
be held by a single  Beneficial Owner and the death of a tenant by the entirety,
joint tenant or tenant in common will be deemed the death of a Beneficial Owner.
The death of a person  who,  during  such  person's  lifetime,  was  entitled to
substantially all of the rights of a Beneficial Owner of an interest in IQ Notes
will be deemed the death of such Beneficial Owner, regardless of the recordation
of such interest on the records of the relevant Participant,  if such rights can
be established to the satisfaction of such  Participant.  Such interest shall be
deemed to exist in  typical  cases of  nominee  ownership,  ownership  under the
Uniform  Gifts to Minors Act or the Uniform  Transfers to Minors Act,  community
property or other similar joint  ownership  arrangements,  including  individual
retirement  accounts or Keogh [H.R.  10] plans  maintained  solely by or for the
decedent or by or for the decedent and any spouse,  and trust and certain  other
arrangements  under  which one person has  substantially  all of the rights of a
Beneficial Owner during such person's lifetime.

          Any  Redemption  Request  may be  withdrawn  by the  Representative(s)
presenting the same upon delivery of a written request for such withdrawal given
by the Participant on behalf of such Representative to the Depositary and by the
Depositary to the Trustee not less than 60 days prior to payment  thereof by the
Company.

          The  Company  may,  at its  option,  purchase  any IQ Notes  for which
Redemption  Requests have been received in lieu of redeeming such IQ Notes.  Any
IQ Notes so purchased by the Company shall either be reoffered for sale and sold
within 180 days after the date of  purchase  or  presented  to the  Trustee  for
redemption  and  cancellation.  Any such  acquisition of IQ Notes by the Company
will not be included in the computation of the $25,000 individual  limitation or
the  aggregate  limitation  applicable  to the  relevant  series for the Initial
Period or any Subsequent Period.

          With respect to each series of IQ Notes,  during such time or times as
such IQ  Notes  are not  represented  by a Global  Security  and are  issued  in
certificated  form, all references in this Section 108 to  Participants  and the
Depositary,   including  the  Depositary's  governing  rules,   regulations  and
procedures shall be deemed deleted,  all determinations which under this section
the Participants  are required to make shall be made by the Company  (including,
without  limitation,  determining whether the applicable decedent is in fact the
Beneficial  Owner of the  interest  in the IQ Notes to be redeemed or is in fact
deceased and whether the Representative is duly authorized to request redemption
on behalf of the applicable  Beneficial Owner), all requests for redemption,  to
be effective,  shall be delivered by the  Representative to the Trustee,  with a
copy to the  Company,  and shall be in the form of a  Redemption  Request  (with
appropriate  changes to reflect the fact that such  Redemption  Request is being
executed  by a  Representative)  and,  in  addition  to all  documents  that are
otherwise  required to accompany a Redemption  Request,  shall be accompanied by
the certificated IQ Note that is the subject of such request.

                                   ARTICLE 2

                          Special Insurance Provisions

          SECTION 201. Consent of Insurer.

          (a) Any provision of the Indenture  expressly  recognizing or granting
rights in or to the  Insurer may not be amended in any manner  which  materially
affects the rights of the Insurer hereunder without the prior written consent of
the Insurer.

          (b) In  any  instance  in  which  the  consent  of  all  or a  certain
percentage  of the  Holders  of a  series  of IQ  Notes is  required  under  the
Indenture,  the  Insurer's  consent  shall be  required  in addition to any such
required  Holders'  consent,  so long as the Insurer is not in default under the
Policy.

          SECTION 202. Events of Default and Remedies. Anything in the Indenture
to the contrary notwithstanding, if an Event of Default with respect to a series
of IQ Notes occurs and is continuing:

          (a) Consent of the Insurer upon Default. The Insurer shall be entitled
to control and direct the enforcement of all rights and remedies  granted to the
Holders of such series or to the Trustee for the benefit of such  Holders  under
the Indenture,  including,  without limitation,  (i) the right to accelerate the
principal of such series as provided in Section 202(b) below, and (ii) the right
to rescind and annul any such declaration of acceleration; and the Insurer shall
also be  entitled  to approve  any waiver of a past  default as  provided  under
Section  513 of the  Original  Indenture.  Notwithstanding  the  foregoing,  the
Insurer's  rights  referred  to in this  Section  202(a)  shall not apply to the
Representatives' rights under Section 108 hereof.

          (b)  Acceleration  Rights.  Upon the occurrence and  continuance of an
Event of Default  with  respect to a  particular  series of IQ Notes the Trustee
may, with the consent of the Insurer, and shall, at the direction of the Insurer
or not less than 33% of the  Holders of such series of IQ Notes with the consent
of the Insurer,  by written  notice to the Company and the Insurer,  declare the
principal  of such  series  of IQ  Notes  to be  immediately  due  and  payable,
whereupon  that portion of the principal of the IQ Notes of such series  thereby
coming  due and the  interest  thereon  accrued  to the date of  payment  shall,
without  further action,  become and be immediately  due and payable;  provided,
however, that if an Event of Default has occurred and is continuing with respect
to more than one series of Securities  under the  Indenture,  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.

          SECTION 203.  Notices/Information to be Given to Insurer. With respect
to each of the 15-Year IQ Notes and the 30-Year IQ Notes,  so long as the Policy
shall be in full force and effect,  the Company and the Trustee  agree to comply
with the provisions set forth below in this Section 203.

          (a)  Information to be provided by Company.  The Company shall furnish
to the surveillance department of the Insurer:

                    (i) as soon as practicable after the filing thereof with the
          Securities and Exchange Commission, a copy of any financial statements
          of the  Company  and a copy of any  audit  and  annual  report  of the
          Company filed therewith;

                    (ii)  such   additional   information  as  the  Insurer  may
          reasonably request; and

                    (iii) a copy of any  notice  to be given to the  Holders  of
          such series of IQ Notes, including, without limitation,  notice of any
          redemption of or defeasance of any such IQ Notes.

          (b)  Information  to be  provided  by  Trustee.  The Trustee or paying
agent,  as  applicable,  shall  notify the office of the general  counsel of the
Insurer as follows:

                    (i) of  any  failure  of the  Company  to  provide  relevant
          notices, certificates or other documents required to be provided under
          the Indenture to the Trustee with respect to such series of IQ Notes;

                    (ii) if at any time  there are  insufficient  moneys to make
          any payments of principal  and/or interest as required with respect to
          such series of IQ Notes; and

                    (iii)  promptly upon the  occurrence of any Event of Default
          under the Indenture.

          (c) Other Information  Rights.  The Company will permit the Insurer to
discuss the  affairs,  finances  and  accounts of the Company  with  appropriate
officers of the  Company.  In  addition,  the Trustee will permit the Insurer to
have  access to and to make  copies of all books and  records  relating  to such
series  of IQ Notes at any  reasonable  time.  The  Insurer  will  keep all such
information  confidential and will use such  information  solely for purposes of
monitoring its responsibilities with respect to such series of IQ Notes.

          SECTION 204. Insurance Policy Payment Procedures. With respect to each
of the 15-Year IQ Notes and the 30-Year IQ Notes, so long as the Policy shall be
in full force and effect,  the Company and the Trustee  agree to comply with the
provisions  set forth below in this  Section  204. In the event that the Company
appoints a paying  agent or new Security  Registrar  with respect to either such
series of IQ Notes,  all references to the Trustee in paragraphs (a) through (f)
of this  Section 204 shall be deemed  instead to refer to such  paying  agent or
Security Registrar, as applicable.  References to the IQ Notes in paragraphs (a)
through (f) of this  Section 204 shall be deemed to refer to each of the 15-Year
IQ Notes and the 30-Year IQ Notes, respectively.

          (a) At least one (1) Business Day prior to each Interest Payment Date,
Stated Maturity or Estate Redemption Date, the Trustee will determine whether it
holds  sufficient  funds for the payment of the principal of and/or  interest on
the IQ Notes  due on such  Interest  Payment  Date,  Stated  Maturity  or Estate
Redemption Date. If the Trustee determines that there will be insufficient funds
available,  the Trustee  shall so notify the Insurer.  Such notice shall specify
the amount of the anticipated deficiency,  the IQ Notes to which such deficiency
is applicable (including,  in the case of an interest in IQ Notes specified in a
Redemption Request, the principal amount thereof and any unpaid interest accrued
thereon that is subject to mandatory  redemption on an Estate  Redemption Date),
and whether such deficiency will be as to principal or interest, or both. If the
Trustee has so notified  the Insurer at least one (1)  Business Day prior to the
relevant  Interest Payment Date,  Stated Maturity or Estate Redemption Date, the
Insurer will make payments of principal  and/or  interest due on the relevant IQ
Notes on or before the first (1st) Business Day next following the date on which
the Insurer shall have received such notice of nonpayment  from the Trustee.  As
used in this Section 204, an "Estate  Redemption Date" shall be, with respect to
each Redemption  Request  submitted to the Company by the Trustee,  the sixtieth
(60th)  day  following  the date of receipt  by the  Company of such  Redemption
Request  from the Trustee,  as described in Section 108 hereof.  Interests in IQ
Notes which are subject to mandatory  redemption on any Estate  Redemption  Date
consist of all or such portion of the principal amount of the IQ Notes specified
in the relevant Redemption Request(s), together with any unpaid interest accrued
thereon,  which  does  not  exceed  the  $25,000  individual  limitation  or the
aggregate principal amount limitation applicable to the IQ Notes for the Initial
Period or Subsequent Period in which such Estate Redemption Date falls.

          (b) With respect to notices of nonpayment of interest and/or principal
applicable to all of the IQ Notes of the series, the Trustee shall, after giving
notice to the Insurer as provided in Section 204(a) above, make available to the
Insurer and, at the Insurer's direction,  to the Insurance Trustee, the Security
Register of the Company  maintained  by the Trustee and all records  relating to
the IQ Notes maintained under the Indenture.

          (c) The Trustee shall  provide the Insurer and the  Insurance  Trustee
with a list of Holders of the IQ Notes  entitled  to  receive  principal  and/or
interest  payments  from the Insurer  under the terms of the  Policy,  including
mandatory  redemption  payments  for  interests  in  IQ  Notes  specified  in  a
Redemption  Request,  and shall make arrangements with the Insurance Trustee (i)
to mail checks or drafts to the Holders of IQ Notes  entitled to receive full or
partial  interest  payments from the Insurer and (ii) to pay  principal  upon IQ
Notes  surrendered to the Insurance  Trustee by the Holders of IQ Notes entitled
to receive full or partial principal payments from the Insurer.

          (d) The Trustee shall,  at the time it provides  notice to the Insurer
pursuant to Section  204(a)  above,  notify the Holders of IQ Notes  entitled to
receive the payment of principal and/or interest thereon from the Insurer (i) as
to the fact of such entitlement, (ii) that the Insurer will remit to them all or
a part of the interest payments due for payment upon proof of Holder entitlement
such interest payments and delivery to the Insurance Trustee, in form reasonably
satisfactory  to the  Insurance  Trustee,  of an  appropriate  assignment of the
Holder's right to such payments,  (iii) that in order to receive full payment of
scheduled principal from the Insurer,  they must surrender their IQ Notes (along
with an appropriate instrument of assignment in form reasonably  satisfactory to
the Insurance  Trustee to permit  ownership of such IQ Notes to be registered in
the name of the  Insurer)  for  payment to the  Insurance  Trustee,  and not the
Trustee,  and  (iv)  that in order  to  receive  partial  payment  of  scheduled
principal  from the  Insurer,  they must  surrender  their IQ Notes for  payment
thereon first to the Trustee, who shall note on such IQ Notes the portion of the
principal paid by the Trustee and then, along with an appropriate  instrument of
assignment in form  reasonably  satisfactory  to the Insurance  Trustee,  to the
Insurance Trustee, which will then pay the unpaid portion of principal.

          (e) In the event  that the  Trustee  has  notice  that any  payment of
principal  of or  interest  on an IQ Note which has become Due for  Payment  (as
defined  in the  Policy)  and  which is made to a Holder  by or on behalf of the
Company has been deemed a preferential  transfer and theretofore  recovered from
its  Holder  pursuant  to the  United  States  Bankruptcy  Code by a trustee  in
bankruptcy  or  other   appropriate   person  in  accordance   with  the  final,
nonappealable order of a court having competent jurisdiction,  the Trustee shall
notify  all  Holders  of IQ  Notes of such  series  that in the  event  that any
Holder's  payment is so recovered,  such Holder will be entitled to payment from
the Insurer to the extent of such recovery if sufficient funds are not otherwise
available  from the Company,  and the Trustee  shall  furnish to the Insurer its
records  evidencing  the  payments of  principal of and interest on the IQ Notes
which have been made by the Trustee and subsequently  recovered from Holders and
the dates on which such payments were made.

          (f) In  addition  to  those  rights  granted  the  Insurer  under  the
Indenture,  the Insurer  shall,  to the extent it makes payments of principal of
and/or interest on IQ Notes,  become  subrogated to the rights of the recipients
of such  payments in  accordance  with the terms of the Policy,  and to evidence
such  subrogation  (i) in the  case of  subrogation  as to  claims  for past due
interest,  the  Trustee  shall  note the  Insurer's  rights as  subrogee  on the
Security  Register of the Company  maintained by the Trustee,  upon receipt from
the Insurer of proof of the  payment of interest  thereon to the Holders of such
IQ  Notes,  and  (ii) in the  case of  subrogation  as to  claims  for  past due
principal,  the  Trustee  shall note the  Insurer's  rights as  subrogee  on the
Security  Register of the Company  maintained  by the Trustee upon  surrender of
such IQ Notes by the  Holders  thereof,  together  with proof of the  payment of
principal thereof.

          SECTION 205. Special Rules Regarding Trustee

          (a) The Trustee or paying  agent,  if any, may be removed  pursuant to
Section 608 of the  Original  Indenture  only with the  consent of the  Insurer,
which consent shall not be unreasonably withheld.

          (b) The Insurer shall receive prior written notice from the Company of
the resignation of any Trustee or paying agent.

          (c) Every successor Trustee  appointed  pursuant to Section 608 of the
Original  Indenture  shall be a trust company or bank in good standing  having a
reported capital and surplus of not less than $75,000,000, and otherwise meeting
the eligibility requirements set forth in Section 310 of the Trust Indenture Act
of 1939, as amended.  Any such successor Trustee shall be reasonably  acceptable
to the  Insurer.  Any  successor  paying  agent,  if  applicable,  shall  not be
appointed unless the Insurer  approves such successor in writing,  such approval
not to be  unreasonably  withheld.  Notwithstanding  any other  provision of the
Indenture,  if a successor  Trustee with respect to a series of IQ Notes has not
been accepted by the Insurer within 30 days after a written notice of removal or
resignation has been delivered to the Company,  the Trustee may petition a court
of competent  jurisdiction  at the expense of the Company to appoint a successor
trustee with respect to such series of IQ Notes.

          (d)  Notwithstanding   any  other  provision  of  the  Indenture,   in
determining  whether  the rights of the  Holders of a series of IQ Notes will be
adversely  affected by any action taken  pursuant to the terms and provisions of
the  Indenture,  the Trustee (or paying agent) shall consider the effect on such
Holders as if there were no Policy with respect to such series.

          SECTION 206.  Application of Term  "Outstanding"  to IQ Notes.  In the
event that the  principal  and/or  interest due on a series of IQ Notes shall be
paid by the Insurer pursuant to the Policy, such series of IQ Notes shall remain
Outstanding for all purposes under the Indenture,  not be considered defeased or
otherwise  satisfied  and  not be  considered  paid  by  the  Company,  and  all
covenants,  agreements  and other  obligations  of the Company to the Holders of
such series  under the  Indenture  shall  continue to exist and shall run to the
benefit of the Insurer,  and the Insurer  shall be  subrogated  to the rights of
such Holders to the extent of each such payment.

          SECTION 207.  Insurer as Third Party  Beneficiary.  To the extent that
this Fifth Supplemental Indenture confers upon or gives or grants to the Insurer
any right,  remedy or claim under or by reason of the Indenture,  the Insurer is
hereby explicitly  recognized as being a third-party  beneficiary  hereunder and
may  enforce  any such  right,  remedy  or  claim  conferred,  given or  granted
hereunder.

          SECTION  208.  Concerning  the  Special  Insurance   Provisions.   The
provisions   of  this  Article  2  shall  apply  to  each  series  of  IQ  Notes
notwithstanding  anything in the Indenture to the contrary,  but only so long as
the Policy  with  respect to such  series of IQ Notes shall be in full force and
effect and the Insurer is not in default thereunder.

                                   ARTICLE 3

                            Miscellaneous Provisions

          SECTION 301.  Ratification and  Incorporation  of Original  Indenture.
From and  after the date  hereof,  the  Original  Indenture  is in all  respects
ratified and confirmed,  and the Original  Indenture,  as  supplemented  by this
Fifth Supplemental Indenture,  shall be read, taken and construed as one and the
same instrument with respect to the 15-Year IQ Notes and the 30-Year IQ Notes.

          SECTION  302.  Acceptance  of Trust.  The  Trustee  accepts the trusts
created by the Original  Indenture,  as supplemented by this Fifth  Supplemental
Indenture,  and agrees to perform the same upon the terms and  conditions in the
Original Indenture, as supplemented by this Fifth Supplemental Indenture.

          SECTION  303.  Recitals  by Company.  The  recitals  contained  in the
Indenture  and the  15-Year  IQ Notes  and the  30-Year  IQ  Notes,  except  the
Trustee's certificate of authentication, are made by the Company only and not by
the Trustee,  and all of the provisions  contained in the Original  Indenture in
respect of the rights, privileges,  immunities, powers and duties of the Trustee
shall be  applicable in respect of the 15-Year IQ Notes and the 30-Year IQ Notes
and of this Fifth Supplemental Indenture as fully and with like effect as if set
forth herein in full.

          SECTION 304.  Amendments.  Notwithstanding any other provision hereof,
all amendments to the Original Indenture made hereby shall have effect only with
respect to the 15-Year IQ Notes and the 30-Year IQ Notes,  and not with  respect
to the Securities of any other series created subsequent to the date hereof.

          SECTION  305.  Executed  in  Counterparts.   This  Fifth  Supplemental
Indenture may be simultaneously executed in any number of counterparts,  each of
which  when so  executed  shall  be  deemed  to be an  original,  and  all  such
counterparts shall together constitute but one and the same instrument.


<PAGE>

          IN  WITNESS   WHEREOF,   each  party  hereto  has  caused  this  Fifth
Supplemental  Indenture  to be signed in its name and on its  behalf by its duly
authorized officers, all as of the date first above written.

ATTEST:                                   INDIANA GAS COMPANY, INC.


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


ATTEST:                                   U.S. BANK TRUST NATIONAL
                                          ASSOCIATION, as Trustee


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




<PAGE>



                                    EXHIBIT A


                             FORM OF 15-YEAR IQ NOTE




<PAGE>
UNLESS THIS NOTE IS PRESENTED BY AN AUTHORIZED  REPRESENTATIVE OF THE DEPOSITORY
TRUST COMPANY (THE  "DEPOSITARY")  (55 WATER STREET,  NEW YORK, NEW YORK) TO THE
ISSUER HEREOF OR ITS AGENT FOR  REGISTRATION  OF TRANSFER,  EXCHANGE OR PAYMENT,
AND ANY NOTE ISSUED IS  REGISTERED  IN THE NAME OF CEDE & CO. OR SUCH OTHER NAME
AS REQUESTED BY AN AUTHORIZED  REPRESENTATIVE  OF THE DEPOSITARY AND ANY PAYMENT
IS MADE TO CEDE & CO.,  ANY  TRANSFER,  PLEDGE OR OTHER USE  HEREOF FOR VALUE OR
OTHERWISE BY OR TO ANY PERSON IS WRONGFUL  SINCE THE  REGISTERED  OWNER  HEREOF,
CEDE & CO., HAS AN INTEREST HEREIN.

UNLESS AND UNTIL IT IS  EXCHANGED IN WHOLE OR IN PART FOR THE  INDIVIDUAL  NOTES
REPRESENTED HEREBY IN CERTIFICATED FORM, THIS NOTE MAY NOT BE TRANSFERRED EXCEPT
AS A WHOLE BY THE  DEPOSITARY TO A NOMINEE OF THE  DEPOSITARY OR BY A NOMINEE OF
THE DEPOSITARY TO THE DEPOSITARY OR ANOTHER  NOMINEE OF THE DEPOSITARY OR BY THE
DEPOSITARY  OR ANY SUCH NOMINEE TO A SUCCESSOR  DEPOSITARY  OR A NOMINEE OF SUCH
SUCCESSOR DEPOSITARY.

REGISTERED
NO.                                                         CUSIP NO. 454758AL7


                            INDIANA GAS COMPANY, INC.

                          7.15% INSURED QUARTERLY NOTE
                              DUE DECEMBER 15, 2015

  Principal Amount:                 $________________

  Regular Record Date:              1st calendar day  of the month in which each
                                    Interest Payment Date falls

  Original Issue Date:              December 28, 2000

  Stated Maturity:                  December 15, 2015

  Interest Payment Dates:           March 15, June 15, September 15 and December
                                    15, commencing March 15, 2001

  Interest Rate:                    7.15% per annum

  Authorized Denomination:          $1,000

  Initial Redemption Date:          December 15, 2004
<PAGE>

         Indiana Gas Company,  Inc., a corporation  incorporated  in Indiana and
Ohio (the "Company"),  which term includes any successor  corporation  under the
Indenture referred to on the reverse hereof, for value received, hereby promises
to pay, without relief from valuation and appraisement  laws, to  ____________.,
or its  registered  assigns,  the  principal  sum of  _________________  DOLLARS
($____________)  on the Stated Maturity shown above (or any Redemption  Date, as
defined on the reverse hereof,  or any earlier date of acceleration of maturity)
(each  such date  being  hereinafter  referred  to as the  "Maturity  Date" with
respect to the principal  repayable on such date),  and to pay interest  thereon
(and on any overdue principal or interest to the extent legally  enforceable) at
the Interest Rate specified  above,  until the principal  hereof is paid or made
available  for payment.  The Company will pay interest  from the Original  Issue
Date  shown  above,  or from  the most  recent  Interest  Payment  Date to which
interest  has been paid or duly  provided  for,  quarterly  in  arrears  on each
Interest  Payment Date as specified  above,  commencing on the Interest  Payment
Date next succeeding the Original Issue Date shown above and, if applicable,  on
the  Maturity  Date.  Payments of interest  on this Note will  include  interest
accrued from, and including,  the immediately preceding Interest Payment Date to
which interest has been paid or duly provided for (or from,  and including,  the
Original  Issue Date if no interest has been paid or duly  provided for) to, but
excluding,  the  applicable  Interest  Payment Date or the Maturity Date, as the
case may be.  Interest  payments for this Note shall be computed and paid on the
basis of a 360-day year consisting of twelve 30-day months.

         The interest so payable and punctually paid or duly provided for on any
Interest Payment Date will, as provided in such Indenture, be paid to the Person
(the  "Holder") in whose name this Note (the "Note") is  registered at the close
of business  on the Regular  Record Date  specified  above next  preceding  such
Interest Payment Date. Except as otherwise  provided in the Indenture,  any such
interest not so  punctually  paid or duly  provided for on any Interest  Payment
Date ("Defaulted  Interest") will forthwith cease to be payable to the Holder at
the close of business on the  applicable  Regular  Record Date and may either be
paid to the  Person  in whose  name  this  Note is  registered  at the  close of
business on a Special Record Date for the payment of such Defaulted  Interest to
be fixed by the  Trustee,  notice  whereof  shall be given to the Holder of this
Note by the Trustee not less than 10 days prior to such Special  Record Date, or
be paid at any time in any other lawful  manner,  all as more fully  provided in
the Indenture.

         Payment of the  principal  of and any  interest in respect of this Note
due on the Maturity Date will be made in immediately  available  funds,  in such
coin or  currency  of the United  States of America as at the time of payment is
legal  tender for payment of public and private  debts,  upon  presentation  and
surrender  of this Note at the office or agency  maintained  by the  Company for
that purpose in the Borough of  Manhattan,  The City of New York,  currently the
office of the Trustee located at 100 Wall Street, Suite 2000, New York, New York
10005,  or at such other paying agency in the Borough of Manhattan,  The City of
New York, as the Company may determine;  provided, however, that if the Maturity
Date falls on or after an Interest  Payment  Date then  Holders  presenting  and
surrendering  IQ Notes on the  Maturity  Date will only be  entitled to interest
accruing on or after such Interest Payment Date.  Payment of interest due on any
Interest  Payment  Date  other  than  the  Maturity  Date  will  be  made at the
aforementioned  office or agency  maintained by the Company or, at the option of
the Company,  (i) by check mailed to the address of the Person entitled  thereto
as such address shall appear in the Security Register  maintained by the Trustee
or (ii) by wire  transfer of  immediately  available  funds at such place and to
such account at a banking  institution in the United States as may be designated
in writing by the Holder to the Trustee at least 16 days prior to such  Interest
Payment Date. Any such wire instructions received by the Trustee shall remain in
effect until revoked by the Holder.

         In the event that any Interest  Payment Date or the Maturity Date falls
on a day that is not a Business  Day,  then the  required  payment of  principal
and/or  interest  payable  on such  date  will be  made on the  next  succeeding
Business  Day,  except  that,  if such  Business  Day is in the next  succeeding
calendar year, payment shall be made on the immediately  preceding Business Day,
in each case with the same force and effect as if made on the date such  payment
was due,  and no  interest  shall  accrue with  respect to such  payment for the
period from and after such  Interest  Payment Date or the Maturity  Date, as the
case may be, to the date of such payment on the next succeeding  Business Day. A
"Business  Day" shall mean any day,  other than a Saturday or a Sunday,  that is
neither a legal holiday nor a day on which  commercial  banks are  authorized or
required by law, regulation or executive order to close in The City of New York.

         Financial  Guaranty  Insurance Policy No. _________ (the "Policy") with
respect to payments due for principal of and interest on this Note and,  subject
to certain annual  principal  amount  limitations set forth in the Indenture and
described on the reverse  hereof,  any payments in connection with the mandatory
redemption  of  interests  in this  Note at the  option  of  representatives  of
deceased  Beneficial  Owners  thereof,   has  been  issued  by  Ambac  Assurance
Corporation  ("Ambac  Assurance").  The Policy has been  delivered to the United
States Trust Company of New York as the Insurance  Trustee under said Policy and
will be held by such Insurance Trustee or any successor  insurance trustee.  The
Policy is on file and  available for  inspection at the principal  office of the
Insurance           Trustee,            currently           located           at
____________________________________________________________, and a copy thereof
may be secured  from Ambac  Assurance  or the  Insurance  Trustee.  All payments
required  to be made  under  the  Policy  shall be made in  accordance  with the
provisions  thereof.  The Holder of this Note  acknowledges  and consents to the
subrogation rights of Ambac Assurance as more fully set forth in the Policy.

         REFERENCE  IS HEREBY  MADE TO THE FURTHER  PROVISIONS  OF THIS NOTE SET
FORTH ON THE REVERSE  HEREOF,  WHICH FURTHER  PROVISIONS  SHALL FOR ALL PURPOSES
HAVE THE SAME EFFECT AS IF SET FORTH ON THE FACE HEREOF.

         Unless the  certificate of  authentication  hereon has been executed by
the Trustee by manual signature,  this Note shall not be entitled to any benefit
under the Indenture or be valid or obligatory for any purpose.


<PAGE>



         IN WITNESS  WHEREOF,  Indiana Gas Company, Inc. has caused this Note to
be duly executed by one of its duly authorized officers.

                                          INDIANA GAS COMPANY, INC.


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


Dated:



TRUSTEE'S CERTIFICATE OF AUTHENTICATION

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

U.S. BANK TRUST NATIONAL ASSOCIATION,
as Trustee

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


<PAGE>

                                [REVERSE OF NOTE]

                            INDIANA GAS COMPANY, INC.

               7.15% INSURED QUARTERLY NOTE DUE DECEMBER 15, 2015

          This  Note is one of a duly  authorized  series of  Securities  of the
Company issued and to be issued under an Indenture, dated as of February 1, 1991
(as amended by the Second  Supplemental  Indenture thereto dated as of September
15, 1991, and by the Fifth Supplemental Indenture dated as of December 28, 2000,
herein referred to as the "Indenture"),  between the Company and U.S. Bank Trust
National Association (formerly known as First Trust National Association,  which
was formerly  known as Bank of America  Illinois,  which was  formerly  known as
Continental Bank, National Association),  as trustee (the "Trustee",  which term
includes any successor trustee under the Indenture),  to which Indenture and all
indentures  supplemental thereto reference is hereby made for a statement of the
respective rights,  limitations of rights,  duties and immunities  thereunder of
the  Company,  the Trustee and the Holders of the  Securities,  and of the terms
upon which the Securities are, and are to be, authenticated and delivered.  This
Note is one of the  series  designated  on the face  hereof  as  "7.15%  Insured
Quarterly Notes due December 15, 2015" (the "15-Year IQ Notes") in the aggregate
principal  amount of  $_________,  subject to the  provisions of the  Indenture.
Capitalized  terms used herein for which no definition is provided  herein shall
have the meanings set forth in the Indenture or on the face hereof,  as the case
may be.

          The Company shall have the right,  subject to the terms and conditions
of the Indenture, to redeem this Note at any time on or after December 15, 2004,
at the option of the Company,  without premium or penalty,  in whole or in part,
at a Redemption  Price equal to 100% of the principal amount to be redeemed plus
any unpaid interest  accrued to the date fixed for redemption  (the  "Redemption
Date"),  on written  notice given to the Holder hereof (in  accordance  with the
provisions of the Indenture) not more than 60 nor less than 30 days prior to the
Redemption Date.

          In the event of redemption of this Note in part only, a new 15-Year IQ
Note or Notes for the unredeemed portion hereof will be issued by the Company in
the name of the Holder hereof upon the  presentation and surrender  hereof.  The
15-Year IQ Notes will not have a sinking fund.

          Unless this Note has been  declared  due and  payable  prior to Stated
Maturity  following  an Event  of  Default,  the  Representative  of a  deceased
Beneficial  Owner of an  interest in this Note may require the Company to redeem
all or a part of such deceased Beneficial Owner's interest in this Note prior to
Stated  Maturity,  in whole or in part in increments  of $1,000,  at 100% of the
principal amount to be redeemed, plus any unpaid interest accrued to the date of
payment,  subject to certain limitations set forth in the Indenture.  Subject to
certain individual and aggregate limitations, and all as set forth more fully in
the Fifth  Supplemental  Indenture,  for  interests  in this Note to be redeemed
pursuant to this special  redemption  option,  the Trustee must receive from the
Depositary a Redemption Request substantially in the form set forth as Exhibit C
to the Fifth  Supplemental  Indenture and shall forward the same to the Company,
whereupon the Company  shall redeem the  interests  set forth in the  Redemption
Request within 60 days following its receipt of such Redemption Request from the
Trustee. As used herein,  "Representative" means the personal  representative or
other Person  authorized to represent the estate of a deceased  Beneficial Owner
of an interest in this Note or a surviving  joint  tenant(s) or tenant(s) by the
entirety of, or the trustee of a trust for, a Beneficial Owner of an interest in
this Note.

          If an Event of  Default  with  respect to the  15-Year IQ Notes  shall
occur and be  continuing,  the  principal of this Note may, and in certain cases
shall, be declared due and payable in the manner, with the effect and subject to
the conditions  provided in the Indenture.  So long as Ambac Assurance is not in
default  under the  Policy,  Ambac  Assurance  shall be  entitled to control and
direct all rights and  remedies  with respect to the 15-Year IQ Notes other than
the rights of the Representatives referred to in the preceding paragraph.

          The Indenture  permits,  with certain  exceptions as therein provided,
the amendment  thereof and the modification of the rights and obligations of the
Company  and the rights of the  Holders of any series of the  Securities  at any
time by the Company and the Trustee  with the consent of the Holders of not less
than a majority of the aggregate  principal amount of all Securities at the time
Outstanding  of each  series  affected  thereby.  The  Indenture  also  contains
provisions  permitting  the  Holders of a majority  of the  aggregate  principal
amount of the  Securities of each series at the time  Outstanding,  on behalf of
the Holders of all Securities of such series, to waive compliance by the Company
with certain  provisions of the  Indenture  and certain past defaults  under the
Indenture  and their  consequences.  Any such consent or waiver by the Holder of
this Note shall be  conclusive  and binding upon such Holder and upon all future
Holders of this Note and of any Note  issued upon the  registration  of transfer
hereof or in exchange herefor or in lieu hereof, whether or not notation of such
consent or waiver is made upon this Note.

          No reference  herein to the Indenture and no provision of this Note or
of the Indenture  shall alter or impair the obligation of the Company,  which is
absolute and unconditional, to pay the principal of and interest on this Note at
the times, place and rate, and in the coin or currency, herein prescribed.

          As  provided  in the  Indenture  and  subject to  certain  limitations
therein set forth,  the  transfer of this Note is  registrable  in the  Security
Register of the Company upon surrender of this Note for registration of transfer
at the office or agency of the Company in any place where the  principal  hereof
or interest  hereon are payable,  duly endorsed by, or  accompanied by a written
instrument  of transfer  in form  satisfactory  to the Company and the  Security
Registrar and duly  executed by the Holder  hereof or by such Holder's  attorney
duly  authorized in writing,  and thereupon one or more new 15-Year IQ Notes, of
authorized  denominations and of like tenor and for the same aggregate principal
amount,  will  be  issued  by  the  Company  to  the  designated  transferee  or
transferees.  No  service  charge  shall be made for any  such  registration  of
transfer or exchange, but the Company may require payment of a sum sufficient to
cover any tax or other governmental charge payable in connection therewith.

          Prior to due  presentment of this Note for  registration  of transfer,
the  Company,  the Trustee and any agent of the Company or the Trustee may treat
the Person in whose  name this Note is  registered  as the owner  hereof for all
purposes,  whether or not this Note be overdue,  and neither  the  Company,  the
Trustee nor any such agent shall be affected by notice to the  contrary,  except
as required by law.

          This Note is  issuable  only in  registered  form  without  coupons in
denominations of $1,000 and any integral  multiple  thereof.  As provided in the
Indenture and subject to certain  limitations therein and herein set forth, this
Note is exchangeable  for a like aggregate  principal amount of 15-Year IQ Notes
of different  authorized  denominations  but otherwise having the same terms and
provisions, as requested by the Holder hereof surrendering the same.

          THE  INDENTURE  AND THIS NOTE SHALL BE GOVERNED  BY, AND  CONSTRUED IN
ACCORDANCE  WITH, THE LAWS OF THE STATE OF INDIANA WITHOUT REGARD TO CONFLICT OF
LAW PRINCIPLES.


<PAGE>




                                  ABBREVIATIONS

         The following  abbreviations,  when used in the inscription on the face
of this  Note,  shall be  construed  as  though  they were  written  out in full
according to applicable laws or regulations:

TEN COM - as tenants in common            UNIF GIFT
TEN ENT - as tenants by the entireties    MIN ACT    - _______ Custodian _______
JT TEN  - as joint tenants with right of               (Cust)            (Minor)
          survivorship and not as tenants              Under Uniform Gifts
          in common                                          to Minors Act
                                                       _________________________
                                                                 (State)

             Additional abbreviations may also be used though not in
                                the above list.

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

                                   ASSIGNMENT

          FOR VALUE  RECEIVED,  the undersigned  hereby  sell(s),  assign(s) and
transfer(s) unto

PLEASE INSERT SOCIAL SECURITY OR
          OTHER
IDENTIFYING NUMBER OF ASSIGNEE
---------------------- ----------------------

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


--------------------------------------------------------------------------------
(Please  print  or  typewrite  name and  address  including  postal  zip code of
assignee)


--------------------------------------------------------------------------------
this  Note  and  all  rights  thereunder  hereby  irrevocably  constituting  and
appointing

--------------------------------------------------------------------------------
Attorney to transfer  this Note on the books of the Trustee,  with full power of
substitution in the premises.

Dated:

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

            --------------     -------------------------------------------------
                                        Notice:   The   signature(s)   on   this
                                        Assignment   must  correspond  with  the
                                        name(s) as written upon the face of this
                                        Note  in   every   particular,   without
                                        alteration or  enlargement or any change
                                        whatsoever.


<PAGE>
                                                                       EXHIBIT B


                             FORM OF 30-YEAR IQ NOTE




<PAGE>



UNLESS THIS NOTE IS PRESENTED BY AN AUTHORIZED  REPRESENTATIVE OF THE DEPOSITORY
TRUST COMPANY (THE  "DEPOSITARY")  (55 WATER STREET,  NEW YORK, NEW YORK) TO THE
ISSUER HEREOF OR ITS AGENT FOR  REGISTRATION  OF TRANSFER,  EXCHANGE OR PAYMENT,
AND ANY NOTE ISSUED IS  REGISTERED  IN THE NAME OF CEDE & CO. OR SUCH OTHER NAME
AS REQUESTED BY AN AUTHORIZED  REPRESENTATIVE  OF THE DEPOSITARY AND ANY PAYMENT
IS MADE TO CEDE & CO.,  ANY  TRANSFER,  PLEDGE OR OTHER USE  HEREOF FOR VALUE OR
OTHERWISE BY OR TO ANY PERSON IS WRONGFUL  SINCE THE  REGISTERED  OWNER  HEREOF,
CEDE & CO., HAS AN INTEREST HEREIN.

UNLESS AND UNTIL IT IS  EXCHANGED IN WHOLE OR IN PART FOR THE  INDIVIDUAL  NOTES
REPRESENTED HEREBY IN CERTIFICATED FORM, THIS NOTE MAY NOT BE TRANSFERRED EXCEPT
AS A WHOLE BY THE  DEPOSITARY TO A NOMINEE OF THE  DEPOSITARY OR BY A NOMINEE OF
THE DEPOSITARY TO THE DEPOSITARY OR ANOTHER  NOMINEE OF THE DEPOSITARY OR BY THE
DEPOSITARY  OR ANY SUCH NOMINEE TO A SUCCESSOR  DEPOSITARY  OR A NOMINEE OF SUCH
SUCCESSOR DEPOSITARY.

REGISTERED
NO.                                                         CUSIP NO. 454758AM5


                            INDIANA GAS COMPANY, INC.

                          7.45% INSURED QUARTERLY NOTE
                              DUE DECEMBER 16, 2030


  Principal Amount:                       $________________

  Regular Record Date:                    1st   calendar  day  of  the  month in
                                          which each Interest Payment Date falls

  Original Issue Date:                    December 28, 2000

  Stated Maturity:                        December 16, 2030

  Interest Payment Dates:                 March 15,  June 15,  September 15  and
                                          December 15, commencing March 15, 2001

  Interest Rate:                          7.45% per annum

  Authorized Denomination:                $1,000

  Initial Redemption Date:                December 15, 2005


          Indiana Gas Company,  Inc., a corporation  incorporated in Indiana and
Ohio corporation (the "Company"),  which term includes any successor corporation
under the  Indenture  referred to on the  reverse  hereof,  for value  received,
hereby promises to pay, without relief from valuation and appraisement  laws, to
_____________, or its registered assigns, the principal sum of _________________
DOLLARS  ($____________)  on the Stated  Maturity shown above (or any Redemption
Date, as defined on the reverse  hereof,  or any earlier date of acceleration of
maturity) (each such date being  hereinafter  referred to as the "Maturity Date"
with  respect to the  principal  repayable  on such date),  and to pay  interest
thereon  (and  on any  overdue  principal  or  interest  to the  extent  legally
enforceable) at the Interest Rate specified above, until the principal hereof is
paid or made  available  for payment.  The Company  will pay  interest  from the
Original Issue Date shown above, or from the most recent  Interest  Payment Date
to which  interest has been paid or duly provided  for,  quarterly in arrears on
each  Interest  Payment  Date as  specified  above,  commencing  on the Interest
Payment  Date next  succeeding  the  Original  Issue  Date shown  above and,  if
applicable, on the Maturity Date. Payments of interest on this Note will include
interest accrued from, and including, the immediately preceding Interest Payment
Date to  which  interest  has  been  paid or duly  provided  for (or  from,  and
including, the Original Issue Date if no interest has been paid or duly provided
for) to, but  excluding,  the applicable  Interest  Payment Date or the Maturity
Date, as the case may be. Interest  payments for this Note shall be computed and
paid on the basis of a 360-day year consisting of twelve 30-day months.

          The interest so payable and  punctually  paid or duly  provided for on
any Interest  Payment Date will, as provided in such  Indenture,  be paid to the
Person (the  "Holder") in whose name this Note (the "Note") is registered at the
close of business on the Regular Record Date specified above next preceding such
Interest Payment Date. Except as otherwise  provided in the Indenture,  any such
interest not so  punctually  paid or duly  provided for on any Interest  Payment
Date ("Defaulted  Interest") will forthwith cease to be payable to the Holder at
the close of business on the  applicable  Regular  Record Date and may either be
paid to the  Person  in whose  name  this  Note is  registered  at the  close of
business on a Special Record Date for the payment of such Defaulted  Interest to
be fixed by the  Trustee,  notice  whereof  shall be given to the Holder of this
Note by the Trustee not less than 10 days prior to such Special  Record Date, or
be paid at any time in any other lawful  manner,  all as more fully  provided in
the Indenture.

          Payment of the  principal  of and any interest in respect of this Note
due on the Maturity Date will be made in immediately  available  funds,  in such
coin or  currency  of the United  States of America as at the time of payment is
legal  tender for payment of public and private  debts,  upon  presentation  and
surrender  of this Note at the office or agency  maintained  by the  Company for
that purpose in the Borough of  Manhattan,  The City of New York,  currently the
office of the Trustee located at 100 Wall Street, Suite 2000, New York, New York
10005,  or at such other paying agency in the Borough of Manhattan,  The City of
New York, as the Company may determine;  provided, however, that if the Maturity
Date falls on or after an Interest  Payment  Date then  Holders  presenting  and
surrendering  IQ Notes on the  Maturity  Date will only be  entitled to interest
accruing on or after such Interest Payment Date.  Payment of interest due on any
Interest  Payment  Date  other  than  the  Maturity  Date  will  be  made at the
aforementioned  office or agency  maintained by the Company or, at the option of
the Company,  (i) by check mailed to the address of the Person entitled  thereto
as such address shall appear in the Security Register  maintained by the Trustee
or (ii) by wire  transfer of  immediately  available  funds at such place and to
such account at a banking  institution in the United States as may be designated
in writing by the Holder to the Trustee at least 16 days prior to such  Interest
Payment Date. Any such wire instructions received by the Trustee shall remain in
effect until revoked by the Holder.

          In the event that any Interest Payment Date or the Maturity Date falls
on a day that is not a Business  Day,  then the  required  payment of  principal
and/or  interest  payable  on such  date  will be  made on the  next  succeeding
Business  Day,  except  that,  if such  Business  Day is in the next  succeeding
calendar year, payment shall be made on the immediately  preceding Business Day,
in each case with the same force and effect as if made on the date such  payment
was due,  and no  interest  shall  accrue with  respect to such  payment for the
period from and after such  Interest  Payment Date or the Maturity  Date, as the
case may be, to the date of such payment on the next succeeding  Business Day. A
"Business  Day" shall mean any day,  other than a Saturday or a Sunday,  that is
neither a legal holiday nor a day on which  commercial  banks are  authorized or
required by law, regulation or executive order to close in The City of New York.

          Financial  Guaranty Insurance Policy No. _________ (the "Policy") with
respect to payments due for principal of and interest on this Note and,  subject
to certain annual  principal  amount  limitations set forth in the Indenture and
described on the reverse  hereof,  any payments in connection with the mandatory
redemption  of  interests  in this  Note at the  option  of  representatives  of
deceased  Beneficial  Owners  thereof,   has  been  issued  by  Ambac  Assurance
Corporation  ("Ambac  Assurance").  The Policy has been  delivered to the United
States Trust Company of New York as the Insurance  Trustee under said Policy and
will be held by such Insurance Trustee or any successor  insurance trustee.  The
Policy is on file and  available for  inspection at the principal  office of the
Insurance           Trustee,            currently           located           at
____________________________________________________________, and a copy thereof
may be secured  from Ambac  Assurance  or the  Insurance  Trustee.  All payments
required  to be made  under  the  Policy  shall be made in  accordance  with the
provisions  thereof.  The Holder of this Note  acknowledges  and consents to the
subrogation rights of Ambac Assurance as more fully set forth in the Policy.

          REFERENCE  IS HEREBY MADE TO THE FURTHER  PROVISIONS  OF THIS NOTE SET
FORTH ON THE REVERSE  HEREOF,  WHICH FURTHER  PROVISIONS  SHALL FOR ALL PURPOSES
HAVE THE SAME EFFECT AS IF SET FORTH ON THE FACE HEREOF.

          Unless the certificate of  authentication  hereon has been executed by
the Trustee by manual signature,  this Note shall not be entitled to any benefit
under the Indenture or be valid or obligatory for any purpose.


<PAGE>

          IN WITNESS WHEREOF,  Indiana Gas Company, Inc. has caused this Note to
be duly executed by one of its duly authorized officers.

                                          INDIANA GAS COMPANY, INC.


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


Dated:



TRUSTEE'S CERTIFICATE OF AUTHENTICATION

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

U.S. BANK TRUST NATIONAL ASSOCIATION,
as Trustee

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


<PAGE>

                                [REVERSE OF NOTE]

                            INDIANA GAS COMPANY, INC.

               7.45% INSURED QUARTERLY NOTE DUE DECEMBER 16, 2030

          This  Note is one of a duly  authorized  series of  Securities  of the
Company issued and to be issued under an Indenture, dated as of February 1, 1991
(as amended by the Second  Supplemental  Indenture thereto dated as of September
15, 1991, and by the Fifth Supplemental Indenture dated as of December 28, 2000,
herein referred to as the "Indenture"),  between the Company and U.S. Bank Trust
National Association (formerly known as First Trust National Association,  which
was formerly  known as Bank of America  Illinois,  which was  formerly  known as
Continental Bank, National Association),  as trustee (the "Trustee",  which term
includes any successor trustee under the Indenture),  to which Indenture and all
indentures  supplemental thereto reference is hereby made for a statement of the
respective rights,  limitations of rights,  duties and immunities  thereunder of
the  Company,  the Trustee and the Holders of the  Securities,  and of the terms
upon which the Securities are, and are to be, authenticated and delivered.  This
Note is one of the  series  designated  on the face  hereof  as  "7.45%  Insured
Quarterly Notes due December 16, 2030" (the "30-Year IQ Notes") in the aggregate
principal  amount of  $_________,  subject to the  provisions of the  Indenture.
Capitalized  terms used herein for which no definition is provided  herein shall
have the meanings set forth in the Indenture or on the face hereof,  as the case
may be.

          The Company shall have the right,  subject to the terms and conditions
of the Indenture, to redeem this Note at any time on or after December 15, 2005,
at the option of the Company,  without premium or penalty,  in whole or in part,
at a Redemption  Price equal to 100% of the principal amount to be redeemed plus
any unpaid interest  accrued to the date fixed for redemption  (the  "Redemption
Date"),  on written  notice given to the Holder hereof (in  accordance  with the
provisions of the Indenture) not more than 60 nor less than 30 days prior to the
Redemption Date.

          In the event of redemption of this Note in part only, a new 30-Year IQ
Note or Notes for the unredeemed portion hereof will be issued by the Company in
the name of the Holder hereof upon the  presentation and surrender  hereof.  The
30-Year IQ Notes will not have a sinking fund.

          Unless this Note has been  declared  due and  payable  prior to Stated
Maturity  following  an Event  of  Default,  the  Representative  of a  deceased
Beneficial  Owner of an  interest in this Note may require the Company to redeem
all or a part of such deceased Beneficial Owner's interest in this Note prior to
Stated  Maturity,  in whole or in part in increments  of $1,000,  at 100% of the
principal amount to be redeemed, plus any unpaid interest accrued to the date of
payment,  subject to certain limitations set forth in the Indenture.  Subject to
certain individual and aggregate limitations, and all as set forth more fully in
the Fifth  Supplemental  Indenture,  for  interests  in this Note to be redeemed
pursuant to this special  redemption  option,  the Trustee must receive from the
Depositary a Redemption Request substantially in the form set forth as Exhibit C
to the Fifth  Supplemental  Indenture and shall forward the same to the Company,
whereupon the Company  shall redeem the  interests  set forth in the  Redemption
Request within 60 days following its receipt of such Redemption Request from the
Trustee. As used herein,  "Representative" means the personal  representative or
other Person  authorized to represent the estate of a deceased  Beneficial Owner
of an interest in this Note or a surviving  joint  tenant(s) or tenant(s) by the
entirety of, or the trustee of a trust for, a Beneficial Owner of an interest in
this Note.

          If an Event of  Default  with  respect to the  30-Year IQ Notes  shall
occur and be  continuing,  the  principal of this Note may, and in certain cases
shall, be declared due and payable in the manner, with the effect and subject to
the conditions  provided in the Indenture.  So long as Ambac Assurance is not in
default  under the  Policy,  Ambac  Assurance  shall be  entitled to control and
direct all rights and remedies with respect to the 30-Year IQ Notes,  other than
the rights of the Representatives referred to in the preceding paragraph.

          The Indenture  permits,  with certain  exceptions as therein provided,
the amendment  thereof and the modification of the rights and obligations of the
Company  and the rights of the  Holders of any series of the  Securities  at any
time by the Company and the Trustee  with the consent of the Holders of not less
than a majority of the aggregate  principal amount of all Securities at the time
Outstanding  of each  series  affected  thereby.  The  Indenture  also  contains
provisions  permitting  the  Holders of a majority  of the  aggregate  principal
amount of the  Securities of each series at the time  Outstanding,  on behalf of
the Holders of all Securities of such series, to waive compliance by the Company
with certain  provisions of the  Indenture  and certain past defaults  under the
Indenture  and their  consequences.  Any such consent or waiver by the Holder of
this Note shall be  conclusive  and binding upon such Holder and upon all future
Holders of this Note and of any Note  issued upon the  registration  of transfer
hereof or in exchange herefor or in lieu hereof, whether or not notation of such
consent or waiver is made upon this Note.

          No reference  herein to the Indenture and no provision of this Note or
of the Indenture  shall alter or impair the obligation of the Company,  which is
absolute and unconditional, to pay the principal of and interest on this Note at
the times, place and rate, and in the coin or currency, herein prescribed.

          As  provided  in the  Indenture  and  subject to  certain  limitations
therein set forth,  the  transfer of this Note is  registrable  in the  Security
Register of the Company upon surrender of this Note for registration of transfer
at the office or agency of the Company in any place where the  principal  hereof
or interest  hereon are payable,  duly endorsed by, or  accompanied by a written
instrument  of transfer  in form  satisfactory  to the Company and the  Security
Registrar and duly  executed by the Holder  hereof or by such Holder's  attorney
duly  authorized in writing,  and thereupon one or more new 30-Year IQ Notes, of
authorized  denominations and of like tenor and for the same aggregate principal
amount,  will  be  issued  by  the  Company  to  the  designated  transferee  or
transferees.  No  service  charge  shall be made for any  such  registration  of
transfer or exchange, but the Company may require payment of a sum sufficient to
cover any tax or other governmental charge payable in connection therewith.

          Prior to due  presentment of this Note for  registration  of transfer,
the  Company,  the Trustee and any agent of the Company or the Trustee may treat
the Person in whose  name this Note is  registered  as the owner  hereof for all
purposes,  whether or not this Note be overdue,  and neither  the  Company,  the
Trustee nor any such agent shall be affected by notice to the  contrary,  except
as required by law.

          This Note is  issuable  only in  registered  form  without  coupons in
denominations of $1,000 and any integral  multiple  thereof.  As provided in the
Indenture and subject to certain  limitations therein and herein set forth, this
Note is exchangeable  for a like aggregate  principal amount of 30-Year IQ Notes
of different  authorized  denominations  but otherwise having the same terms and
provisions, as requested by the Holder hereof surrendering the same.

          THE  INDENTURE  AND THIS NOTE SHALL BE GOVERNED  BY, AND  CONSTRUED IN
ACCORDANCE  WITH, THE LAWS OF THE STATE OF INDIANA WITHOUT REGARD TO CONFLICT OF
LAW PRINCIPLES.


<PAGE>




                                  ABBREVIATIONS

          The following abbreviations,  when used in the inscription on the face
of this  Note,  shall be  construed  as  though  they were  written  out in full
according to applicable laws or regulations:

TEN COM   - as tenants in common              UNIF GIFT
TEN ENT   - as tenants by the entireties      MIN ACT   - _____ Custodian ______
JT TEN    - as joint tenants with right of                (Cust)         (Minor)
            survivorship and not as tenants             Under Uniform Gifts to
            in common                                   Minors Act
                                                        ________________________
                                                            (State)

             Additional abbreviations may also be used though not in
                                the above list.

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

                                   ASSIGNMENT

          FOR VALUE  RECEIVED,  the undersigned  hereby  sell(s),  assign(s) and
transfer(s) unto

PLEASE INSERT SOCIAL SECURITY OR
          OTHER
IDENTIFYING NUMBER OF ASSIGNEE
---------------------- ----------------------

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

--------------------------------------------------------------------------------
(Please  print  or  typewrite  name and  address  including  postal  zip code of
assignee)

--------------------------------------------------------------------------------
this  Note  and  all  rights  thereunder  hereby  irrevocably  constituting  and
appointing

--------------------------------------------------------------------------------
Attorney to transfer  this Note on the books of the Trustee,  with full power of
substitution in the premises.

Dated:


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

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

                                        Notice:   The   signature(s)   on   this
                                        Assignment   must  correspond  with  the
                                        name(s) as written upon the face of this
                                        Note  in   every   particular,   without
                                        alteration or  enlargement or any change
                                        whatsoever.


<PAGE>

                                    EXHIBIT C

                           FORM OF REDEMPTION REQUEST



<PAGE>



                            INDIANA GAS COMPANY, INC.

                      [7.15/7.45]% INSURED QUARTERLY NOTES
                    due [December 15, 2015/December 16, 2030]
                                (the "IQ Notes")

                         CUSIP NO. [454758AL7/454758AM5]


          The undersigned,  ___________________ (the "Participant"), pursuant to
the  provisions  of that  certain  Indenture  dated as of February  1, 1991,  as
supplemented,  including the Fifth  Supplemental  Indenture dated as of December
___, 2000 (the "Indenture"),  made by Indiana Gas Company,  Inc. (the "Company")
and U.S.  Bank Trust  National  Association,  as Trustee (the  "Trustee"),  does
hereby certify to The Depository Trust Company (the  "Depositary"),  the Company
and the Trustee that:

          1. _______________ [Name of deceased Beneficial Owner] is deceased.

          2.  _______________  [Name of deceased Beneficial Owner] had a $______
interest in the above referenced IQ Notes.

          3.   _______________[Name   of   Representative]   is  _______________
[Beneficial Owner's personal representative/other person authorized to represent
the estate of the Beneficial  Owner/surviving joint  tenant/surviving  tenant by
the entirety] of  _______________  [Name of deceased  Beneficial  Owner] and has
delivered to the  undersigned a request for redemption in form  satisfactory  to
the undersigned,  requesting that $_______  principal amount of said IQ Notes be
redeemed  pursuant to said Indenture.  The documents  accompanying such request,
all of  which  are in  proper  form,  are in all  respects  satisfactory  to the
undersigned and the _______________ [Name of Representative] is entitled to have
the IQ Notes to which this Request relates redeemed.

          4. The Participant  holds the interest in the IQ Notes with respect to
which this  Request for  Redemption  is being made on behalf of  _______________
[Name of deceased Beneficial Owner].

          5. The  Participant  hereby  certifies that it will indemnify and hold
harmless  the  Depositary,  the  Trustee,  any  paying  agent  and  the  Company
(including  their  respective  officers,   directors,   agents,   attorneys  and
employees),  against all damages,  loss,  cost,  expense  (including  reasonable
attorneys' and accountants' fees), obligations,  claims or liability incurred by
the  indemnified  party or  parties  as a result  of or in  connection  with the
redemption of IQ Notes to which this Redemption Request relates. The Participant
will,  at the  request  of the  Company,  forward  to the  Company a copy of the
documents  submitted by  _______________  [Name of Representative] in support of
the request for redemption.


<PAGE>



          IN WITNESS  WHEREOF,  the  undersigned  has executed  this  Redemption
Request as of _________, _____.



                                          [PARTICIPANT NAME]


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


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