1
                                                                    EXHIBIT 4(b)



                        SIXTH SUPPLEMENTAL INDENTURE
                       DATED AS OF _________ __, 1998

                            ____________________



              This Sixth Supplemental Indenture, dated as of the ____ day of
_________, 1998 between CMS Energy Corporation, a corporation duly organized
and existing under the laws of the State of Michigan (hereinafter called the
"Issuer") and having its principal office at Fairlane Plaza South, Suite 1100,
330 Town Center Drive, Dearborn, Michigan 48126, and NBD Bank, a Michigan
banking corporation (hereinafter called the "Indenture Trustee") and having its
principal Corporate Trust Office at 611 Woodward Avenue, Detroit, Michigan
48226.

                                  WITNESSETH:

              WHEREAS, the Issuer and the Indenture Trustee (formerly known as
NBD Bank, National Association) entered into an Indenture, dated as of
September 15, 1992 (the "Original Indenture"), pursuant to which one or more
series of debt securities of the Issuer (the "Securities") may be issued from
time to time; and

              WHEREAS, Section 2.3 of the Original Indenture permits the terms
of any series of Securities to be established in an indenture supplemental to
the Original Indenture; and

              WHEREAS, Section 8.1(e) of the Original Indenture provides that a
supplemental indenture may be entered into by the Issuer and the Indenture
Trustee without





   2
                                      2

the consent of any Holders of the Securities to establish the form and terms of
the Securities of any series; and 

              WHEREAS, the Issuer has requested the Indenture Trustee to join 
with it in the execution and delivery of this Sixth Supplemental Indenture 
in order to supplement and amend the Original Indenture by, among other 
things, establishing the form and terms of a series of Securities to be
known as the Issuer's "Extendible Tenor Rate-Adjusted Securities" (the
"X-TRAS"), providing for the issuance of the X-TRAS and amending and adding
certain provisions thereof for the benefit of the Holders of the X-TRAS; and

              WHEREAS, the Issuer and the Indenture Trustee desire to enter
into this Sixth Supplemental Indenture for the purposes set forth in Sections
2.3 and 8.1(e) of the Original Indenture as referred to above; and

              WHEREAS, the Issuer has furnished the Indenture Trustee with a
copy of the resolutions of its Board of Directors certified by its Secretary or
Assistant Secretary authorizing the execution of this Sixth Supplemental
Indenture; and

              WHEREAS, all things necessary to make this Sixth Supplemental
Indenture a valid agreement of the Issuer and the Indenture Trustee and a valid
supplement to the Original Indenture have been done,

              NOW, THEREFORE, THIS SIXTH SUPPLEMENTAL INDENTURE WITNESSETH:

              For and in consideration of the premises and the purchase of the
X-TRAS to be issued hereunder by holders thereof, the Issuer and the Indenture
Trustee mutually



   3

                                       3

covenant and agree, for the equal and proportionate benefit of the respective
holders from time to time of the X-TRAS, as follows:

                                   ARTICLE I

                        STANDARD PROVISIONS; DEFINITIONS

              SECTION 1.01.  Standard Provisions.  The Original Indenture
together with this Sixth Supplemental Indenture and all previous indentures
supplemental thereto entered into pursuant to the applicable terms thereof are
hereinafter sometimes collectively referred to as the "Indenture."  All
capitalized terms which are used herein and not otherwise defined herein are
defined in the Indenture and are used herein with the same meanings as in the
Indenture.

              SECTION 1.02.  Definitions.  Section 1.1 of the Original
Indenture is amended to insert the new definitions applicable to the X-TRAS,
in the appropriate alphabetical sequence, as follows:

              "Amortization Expense" means, for any period, amounts recognized
during such period as amortization of capital leases, depletion, nuclear fuel,
goodwill and assets classified as intangible assets in accordance with
generally accepted accounting principles.

   
              "Applicable Premium" means, with respect to X-TRAS (or portion
thereof) being redeemed at any time, the excess of (A) the present value at
such time of the principal amount of such X-TRAS (or portion thereof) being
redeemed plus all interest payments due on such X-TRAS (or portion thereof)
from and after the date of redemption, which present value shall be computed
using a discount rate equal to the 
    
        




   4

                                       4
Treasury Rate plus 50 basis points, over (B) the principal amount of such 
X-TRAS (or portion thereof) being redeemed at such time.  For purposes of this 
definition, the present values of interest and principal payments will be 
determined in accordance with generally accepted principles of financial 
analysis.

              "Average Life" means, as of the date of determination, with
respect to any Indebtedness, the quotient obtained by dividing (i) the sum of
the products of (x) the number of years from the date of determination to the
dates of each successive scheduled principal payment of such Indebtedness and
(y) the amount of such principal payment by (ii) the sum of all such principal
payments.

              "Calculation Agent" means Morgan Stanley Capital Services, Inc.,
or such other calculation agent as may be provided from time to time under the
ISDA Master Agreement.  All determinations made by the Calculation Agent will
be at the sole discretion of the Calculation Agent and will, in the absence of
manifest error, be conclusive for all purposes and binding on the Issuer.

              "Capital Lease Obligation" of a Person means any obligation that
is required to be classified and accounted for as a capital lease on the face
of a balance sheet of such Person prepared in accordance with generally
accepted accounting principles; the amount of such obligation shall be the
capitalized amount thereof, determined in accordance with generally accepted
accounting principles; the stated maturity thereof shall be the date of the
last payment of rent or any other amount due under such lease prior to the
first date upon which such lease may be terminated by the lessee without
payment of a penalty; and such





   5

                                       5

obligation shall be deemed secured by a Lien on any property or assets to which
such lease relates.

              "Capital Stock" means any and all shares, interests, rights to
purchase, warrants, options, participations or other equivalents of or
interests in (however designated) corporate stock, including any Preferred
Stock or Letter Stock; provided that Hybrid Preferred Securities are not
considered Capital Stock for purposes of this definition.

   
              "Certificate" or "Certificates" shall have the meaning set forth
in the Pass Through Trust Agreement.  
    

   
              "Certificateholder" or "Certificateholders" shall have the
meaning set forth in the Pass Through Trust Agreement.
    

              "Change in Control" means an event or series of events by which 
(i) the Issuer ceases to own beneficially, directly or indirectly, at least 
80% of the total voting power of all classes of Capital Stock then outstanding
of Consumers (whether arising from issuance of securities of the Issuer or 
Consumers, any direct or indirect transfer of securities by the Issuer or 
Consumers, any merger, consolidation, liquidation or dissolution of the Issuer
or Consumers or otherwise); (ii) any "person" or "group" (as such terms are 
used in Sections 13(d) and 14(d) of the Exchange Act) becomes the "beneficial 
owner" (as such term is used in Rules 13d-3 and 13d-5 under the Exchange Act, 
except that a person or group shall be deemed to have "beneficial ownership" 
of all shares that such person or group has the right to acquire, whether 
such right is exercisable immediately or only after the passage of time), 
directly or indirectly, of more than 35% of the Voting Stock of the Issuer; 
or (iii) 

   6


                                      6

the Issuer consolidates with or merges into another corporation  or
directly or indirectly conveys, transfers or leases all or substantially  all
of its assets to any Person, or any corporation consolidates with or merges
into the Issuer, in either event  pursuant to a transaction in which the
outstanding Voting Stock of the Issuer is changed into or exchanged for cash,
securities, or other property, other than any such transaction in which (A) the
outstanding Voting Stock of the Issuer is changed into or exchanged for Voting
Stock of the surviving corporation and (B) the holders of the Voting Stock of
the Issuer immediately prior to such transaction retain, directly or
indirectly, substantially proportionate ownership of the Voting Stock of the
surviving corporation immediately after such transaction.

              "CMS Electric and Gas" means CMS Electric and Gas Company, a
Michigan corporation and wholly-owned subsidiary of Enterprises.

              "CMS Gas Transmission and Storage" means CMS Gas Transmission and
Storage Company, a Michigan corporation and wholly-owned subsidiary of 
Enterprises.

              "CMS Generation" means CMS Generation Co., a Michigan corporation
and wholly-owned subsidiary of Enterprises.  

              "CMS MST" means CMS Marketing, Services and Trading Company, a 
Michigan corporation and wholly-owned subsidiary of Enterprises.  

              "Consolidated Assets" means, at any date of determination, the 
aggregate assets of the Issuer and its Consolidated Subsidiaries determined 
on a consolidated basis in accordance with generally accepted accounting 
principles.






   7

                                       7
   
    


              "Consolidated Coverage Ratio" with respect to any period means
the ratio of (i) the aggregate amount of Operating Cash Flow for such period to
(ii) the aggregate amount of Consolidated Interest Expense for such period.

              "Consolidated Current Liabilities" means, for any period, the
aggregate amount of liabilities of the Issuer and its Consolidated Subsidiaries
which may properly be classified as current liabilities (including taxes
accrued as estimated), after (i) eliminating all inter- company items between
the Issuer and any Consolidated Subsidiary and (ii) deducting all current
maturities of long-term Indebtedness, all as determined in accordance with
generally accepted accounting principles.

              "Consolidated Indebtedness" means, at any date of determination,
the aggregate Indebtedness of the Issuer and its Consolidated Subsidiaries
determined on a consolidated basis in accordance with generally accepted
accounting principles; provided that Consolidated Indebtedness shall not
include any subordinated debt owned by any Hybrid Preferred Securities
Subsidiary.

   8

                                      8

              "Consolidated Interest Expense" means, for any period, the total
interest expense in respect of Consolidated Indebtedness of the Issuer and its
Consolidated Subsidiaries, including, without duplication, (i) interest expense
attributable to capital leases, (ii) amortization of debt discount, (iii)
capitalized interest, (iv) cash and noncash interest payments, (v) commissions,
discounts and other fees and charges owed with respect to letters of credit and
bankers' acceptance financing, (vi) net costs under Interest Rate Protection
Agreements (including amortization of discount) and (vii) interest expense in
respect of obligations of other Persons deemed to be Indebtedness of the Issuer
or any Consolidated Subsidiaries under clause (v) or (vi) of the definition of
Indebtedness, provided, however, that Consolidated Interest Expense shall
exclude (a) any costs otherwise included in interest expense recognized on
early retirement of debt and (b) any interest expense in respect of any
Indebtedness of any Subsidiary of Consumers, CMS Generation, NOMECO, CMS
Electric and Gas, CMS Gas Transmission and Storage, CMS MST or any other
Designated Enterprises Subsidiary, provided that such Indebtedness is without
recourse to any assets of the Issuer, Consumers, Enterprises, CMS Generation,
NOMECO, CMS Electric and Gas, CMS Gas Transmission and Storage, CMS MST or any
other Designated Enterprises Subsidiary.

              "Consolidated Net Income" means, for any period, the net income
of the Issuer and its Consolidated Subsidiaries determined on a consolidated
basis in accordance with generally accepted accounting principles; provided,
however, that there shall not be included in such Consolidated Net Income:

   9

                                      9

              (i)    any net income of any Person if such Person is not a
       Subsidiary, except that (A) the Issuer's equity in the net income of any
       such Person for such period shall be included in such Consolidated Net
       Income up to the aggregate amount of cash actually distributed by such
       Person during such period to the Issuer or a Consolidated
       Subsidiary as a dividend or other distribution and (B) the Issuer's
       equity in a net loss of any such Person for such period shall be
       included in determining such Consolidated Net Income;

              (ii)   any net income of any Person acquired by the Issuer or a
       Subsidiary in a pooling of interests transaction for any period prior to
       the date of such acquisition;

              (iii)  any gain or loss realized upon the sale or other
       disposition of any property, plant or equipment of the Issuer or its
       Consolidated Subsidiaries which is not sold or otherwise disposed of in
       the ordinary course of business and any gain or loss realized upon the
       sale or other disposition of any Capital Stock of any Person; and

              (iv)   any net income of any Subsidiary of Consumers, CMS
       Generation, NOMECO, CMS Electric and Gas, CMS Gas Transmission and
       Storage, CMS MST or any other Designated Enterprises Subsidiary whose
       interest expense is excluded from Consolidated Interest Expense,
       provided, however, that for purposes of this subsection (iv), any cash,
       dividends or distributions of any such Subsidiary to the Issuer shall be
       included in calculating Consolidated Net Income.


   10

                                     10

              "Consolidated Net Tangible Assets" means, for any period, the 
total amount of assets (less accumulated depreciation or amortization, 
allowances for doubtful receivables, other applicable reserves and other 
properly deductible items) as set forth on the most recently available 
quarterly or annual consolidated balance sheet of the Issuer and its 
Consolidated Subsidiaries, determined on a consolidated basis in accordance     
with generally accepted accounting principles, and after giving effect to
purchase accounting and after deducting therefrom, to the extent otherwise
included, the amounts of: (i) Consolidated Current Liabilities; (ii) minority
interests in Consolidated Subsidiaries held by Persons other than the Issuer or
a Restricted Subsidiary; (iii) excess of cost over fair value of assets of
businesses acquired, as determined in good faith by the Board of Directors as
evidenced by Board resolutions; (iv) any revaluation or other write-up in value
of assets subsequent to December 31, 1996, as a result of a change in the
method of valuation in accordance with generally accepted accounting
principles; (v) unamortized debt discount and expenses and other unamortized
deferred charges, goodwill, patents, trademarks, service marks, trade names,
copyrights, licenses organization or developmental expenses and other
intangible items; (vi) treasury stock; and (vii) any cash set apart and held in
a sinking or other analogous fund established for the purpose of redemption or
other retirement of Capital Stock to the extent such obligation is not
reflected in Consolidated Current Liabilities.

              "Consolidated Net Worth" of any Person means the total of the
amounts shown on the consolidated balance sheet of such Person and its
consolidated subsidiaries, determined on a consolidated basis in accordance
with generally accepted accounting principles, as of 

   11

                                     11

any date selected by such Person not more than 90 days prior to the
taking of any action for the purpose of which the determination is being made
(and adjusted for any material events since such date), as (i) the par or
stated value of all outstanding Capital Stock plus (ii) paid-in capital or
capital surplus relating to such Capital Stock plus (iii) any retained earnings
or earned surplus less (A) any accumulated deficit, (B) any amounts attributable
to Redeemable Stock and (C) any amounts attributable to Exchangeable Stock.

              "Consolidated Subsidiary" means, any Subsidiary whose accounts
are or are required to be consolidated with the accounts of the Issuer in
accordance with generally accepted accounting principles.

              "Consumers" means Consumers Energy Company, a Michigan
corporation, all of whose common stock is on the date hereof owned by the
Issuer.

              "Designated Enterprises Subsidiary" means any wholly-owned
subsidiary of Enterprises formed after the date of this Sixth Supplemental
Indenture which is designated a Designated Enterprises Subsidiary by the Board
of Directors.

              "Enterprises" means CMS Enterprises Company, a Michigan
corporation and wholly-owned subsidiary of the Issuer.  

              "Early Redemption Option" shall have the meaning set forth in 
Section 7.01(b).  

              "Event of Default" with respect to the X-TRAS has the meaning 
specified in Article V of this Sixth Supplemental Indenture.  

              "Exchange Act" means the Securities Exchange Act of 1934, as 
amended.  


   12


                                     12

   

              "Exchangeable Stock" means any Capital Stock of a corporation 
that is exchangeable or convertible into another security (other than Capital 
Stock of such corporation that is neither Exchangeable Stock nor Redeemable 
Stock).
    

              "Exercise Date" means the 90th day prior the Settlement Date.

              "Extended Stated Maturity" shall have the meaning set forth in
Section 2.01.

   
              "Extension Notice" shall have the meaning set forth in the Pass
Through Trust Agreement.
    

   
              "Extension Option" shall have the meaning set forth in the Pass
Through Trust Agreement.
    

              "Extension Option Buyer" means Morgan Stanley Capital Services,
Inc.

              "FD Redemption Option" shall have the meaning set forth in
Section 7.01(c). 

              "Final Distribution" shall have the meaning set forth in the
Pass Through Trust Agreement.

              "Final Distribution Date" shall have the meaning set forth in the
Pass Through Trust Agreement.

              "Hybrid Preferred Securities" means any preferred securities
issued by a Hybrid Preferred Securities Subsidiary, where such preferred
securities have the following characteristics:  (i) such Hybrid Preferred
Securities Subsidiary lends substantially all of the proceeds from the issuance
of such preferred securities to the Issuer or Consumers in exchange for
subordinated debt issued by the Issuer or Consumers, respectively; (ii) such
preferred securities contain terms providing for the deferral of distributions
corresponding to provisions 


   13


                                     13


providing for the deferral of interest payments on such subordinated
debt; and (iii) the Issuer or Consumers (as the case may be) makes periodic
interest payments on such subordinated debt, which interest payments are in
turn used by the Hybrid Preferred Securities Subsidiary to make corresponding
payments to the holders of the Hybrid Preferred Securities.

              "Hybrid Preferred Securities Subsidiary" means any business trust
(or similar entity) (i) all of the common equity interest of which is owned
(either directly or indirectly through one or more wholly-owned Subsidiaries of
the Issuer or Consumers) at all times by the Issuer or Consumers, (ii) that has
been formed for the purpose of issuing Hybrid Preferred Securities and (iii)
substantially all of the assets of which consist at all times solely of
subordinated debt issued by the Issuer or Consumers (as the case may be) and
payments made from time to time on such subordinated debt.

   
              "ISDA Amount" shall mean such amount as may be due and payable by 
the Pass Through Trust under the ISDA Master Agreement under the circumstances
contemplated thereby as notified to the Issuer, the Indenture Trustee and the
Pass Through Trustee by the Calculation  Agent or the Extension Option Buyer.
    

              "Indebtedness" of any Person means, without duplication,

              (i)    the principal of and premium (if any) in respect of (A)
       indebtedness of such Person for money borrowed and (B) indebtedness
       evidenced by notes, debentures, bonds or other similar instruments for
       the payment of which such Person is responsible or liable;

              (ii)   all Capital Lease Obligations of such Person;

   14

                                     14

              (iii)  all obligations of such Person issued or assumed as the
       deferred purchase price of property, all conditional sale obligations
       and all obligations under any title retention agreement (but excluding
       trade accounts payable arising in the ordinary course of business);

              (iv)   all obligations of such Person for the reimbursement of
       any obligor on any letter of credit, bankers' acceptance or similar
       credit transaction (other than obligations with respect to letters of
       credit securing obligations (other than obligations described in clauses
       (i) through (iii) above) entered into in the ordinary course of business
       of such Person to the extent such letters of credit are not drawn upon 
       or, if and to the extent drawn upon, such drawing is reimbursed no 
       later than the third Business Day following receipt by such Person of a 
       demand for reimbursement following payment on the letter of credit);

              (v)    all obligations of the type referred to in clauses (i)
       through (iv) of other Persons and all dividends of other Persons for the
       payment of which, in either case, such Person is responsible or liable
       as obligor, guarantor or otherwise; and

              (vi)   all obligations of the type referred to in clauses (i)
       through (v) of other Persons secured by any Lien on any property or
       asset of such Person (whether or not such obligation is assumed by such
       Person), the amount of such obligation being deemed to be the lesser of
       the value of such property or assets or the amount of the obligation so
       secured.

              "Initial Stated Maturity" means, with respect to the X-TRAS,
 ___________ 



   15

                                     15

__, 200_.

              "Interest Payment Date" means [_______ __,] 1998 and each 
[__________ __] and [___________] in each year thereafter.

              "ISDA Master Agreement" means the ISDA Master Agreement, Schedule
and Confirmation dated as of ___________ [  ], 1997 entered into by the Pass
Through Trust and the Extension Option Buyer, as amended from time to time.

              "Interest Rate Protection Agreement" means any interest rate swap
agreement, interest rate cap agreement or other financial agreement or
arrangement designed to protect the Issuer or any Subsidiary against
fluctuations in interest rates.

              "Letter Stock", as applied to the Capital Stock of any
corporation, means Capital Stock of any class or classes (however designated)
which is intended to reflect the separate performance of certain of the
businesses or operations conducted by such corporation or any of its
subsidiaries.

              "Lien" means any lien, mortgage, pledge, security interest,
conditional sale, title retention agreement or other charge or encumbrance of
any kind.

              "Net Cash Proceeds" means, (a) with respect to any Asset Sale ,
the aggregate proceeds of such Asset Sale including the fair market value (as
determined by the Board of Directors and net of any associated debt and of any
consideration other than Capital Stock received in return) of property other
than cash, received by the Issuer, net of (i) brokerage commissions and other
fees and expenses (including fees and expenses of counsel and investment
bankers) related to such Asset Sale, (ii) provisions for all taxes (whether or
not such taxes will 


   16

                                     16

actually be paid or are payable) as a result of such Asset Sale without
regard to the consolidated results of operations of the Issuer and its
Restricted Subsidiaries, taken as a whole, (iii) payments made to repay
Indebtedness or any other obligation outstanding at the time of such Asset Sale
that either (A) is secured by a Lien on the property or assets sold or (B) is
required to be paid as a result of such sale and (iv) appropriate amounts to be
provided by the Issuer or any Restricted Subsidiary of the Issuer as a reserve
against any liabilities associated with such Asset Sale including, without
limitation, pension and other post-employment benefit liabilities, liabilities
related to environmental matters and liabilities under any indemnification
obligations associated with such Asset Sale, all as determined in conformity
with generally accepted accounting principles and (b) with respect to any
issuance or sale or contribution in respect of Capital Stock, the aggregate
proceeds of such issuance, sale or contribution,  including the fair market
value (as determined by the Board of Directors and net of any associated debt
and of any consideration other than Capital Stock received in return) of
property other than cash, received by the Issuer, net of attorneys' fees,
accountants' fees, underwriters' or placement agents' fees, discounts or
commissions and brokerage, consultant and other fees incurred in connection
with such issuance or sale and net of taxes paid or payable as a result
thereof, provided, however, that if such fair market value as determined by the
Board of Directors of property other than cash is greater than $25 million, the
value thereof shall be based upon an opinion from an independent nationally
recognized firm experienced in the appraisal or similar review of similar types
of transactions.


   17
                                     17

              "NOMECO" means, CMS NOMECO Oil & Gas Co., a Michigan corporation
and wholly-owned subsidiary of Enterprises.  

              "Non-Convertible Capital Stock" means, with respect to any 
corporation, any non-convertible Capital Stock of such corporation and
any Capital Stock of such corporation convertible solely into non-convertible
Capital Stock other than Preferred Stock of such corporation; provided,
however, that Non-Convertible Capital Stock shall not include any Redeemable
Stock or Exchangeable Stock.

              "Operating Cash Flow" means, for any period, with respect to the
Issuer and its Consolidated Subsidiaries, the aggregate amount of Consolidated
Net Income after adding thereto Consolidated Interest Expense (adjusted to
include costs recognized on early retirement of debt), income taxes,
depreciation expense, Amortization Expense and any noncash amortization of debt
issuance costs, any nonrecurring, noncash charges to earnings and any negative
accretion recognition.

              "Other Rating Agency" shall mean any one of Duff & Phelps Credit
Rating Co., Fitch Investors Service, L.P. or Moody's Investors Service, Inc.,
and any successor to any of these organizations which is a nationally
recognized statistical rating organization.

              "Pass Through Trust" means the CMS Energy X-TRAS(sm) Pass Through
Trust I created under the Pass Through Trust Agreement, as holder of the X-TRAS
from the Original Issue Date to the Initial Stated Maturity.

              "Pass Through Trust Agreement" means the Amended and Restated
Pass Through Trust Agreement dated as of ________ __, 1998 between the Issuer
and the Pass Through Trustee.

   18


                                     18

              "Pass Through Trustee" means the Pass Through Trustee appointed
from time to time under the Pass Through Trust Agreement (which initially shall
be Wilmington Trust Company).

              "Paying Agent" means any person authorized by the Issuer to pay
the principal of (and premium, if any) or interest on any of the X-TRAS on
behalf of the Issuer.  Initially, the Paying Agent is the Indenture Trustee.

              "Predecessor X-TRAS" of any particular X-TRAS means all previous
X-TRAS evidencing all or a portion of the same debt as that evidenced by such
particular X-TRAS; and, for the purposes of the definition, any X-TRAS
authenticated and delivered under Section 2.9 of the Indenture in exchange for
or in lieu of a mutilated, destroyed, lost or stolen X-TRAS shall be deemed to
evidence the same debt as the mutilated, destroyed, lost or stolen X-TRAS.

              "Preferred Stock", as applied to the Capital Stock of any
corporation, means Capital Stock of any class or classes (however designated)
that is preferred as to the payment of dividends, or as to the distribution of
assets upon any voluntary or involuntary liquidation or dissolution of such
corporation, over shares of Capital Stock of any other class of such
corporation; provided that Hybrid Preferred Securities are not considered
Preferred Stock for purposes of this definition.

              "Premium Termination Date" means the 90th day prior to the
Initial Stated Maturity.

              "Put Option" shall have the meaning set forth in Section 7.02.

   19

                                     19

              "Redeemable Stock" means any Capital Stock that by its terms or
otherwise is required to be redeemed prior to the first anniversary of the
Stated Maturity of the Outstanding X-TRAS or is redeemable at the option of the
holder thereof at any time prior to the first anniversary of the Stated
Maturity of the Outstanding X-TRAS.

   
              "Reference Treasury Note Yield" means ____ %
    

              "Remarketing Agent" means Morgan Stanley & Co. Incorporated or
such other investment banking institution as shall be selected in accordance
with Section 8.02 in connection with a remarketing of the X-TRAS.

              "Remarketing Deadline" means the fifteenth day prior to the
Initial Stated Maturity or such earlier date as may be mutually agreed by the
Issuer, the Indenture Trustee, the Pass Through Trustee and the Extension
Option Buyer.

              "Remarketing Procedure" shall have the meaning set forth in
Section 8.02.

              "Required Remarketing Proceeds" shall have the meaning set forth
in Section 8.01.

              "Restricted Subsidiary" means any Subsidiary (other than
Consumers and its subsidiaries) of the Issuer which, as of the date of the
Issuer's most recent quarterly consolidated balance sheet, constituted at least
10% of the total Consolidated Assets of the Issuer and its Consolidated
Subsidiaries and any other Subsidiary which from time to time is designated a
Restricted Subsidiary by the Board of Directors; provided that no Subsidiary may
be designated 



   20

                                     20
        
a Restricted Subsidiary if, immediately after giving effect thereto, an
Event of Default or event that, with the lapse of time or giving of notice or
both, would constitute an Event of Default would exist or the Issuer and its
Restricted Subsidiaries could not incur at least one dollar of additional
Indebtedness under Section 4.03, and (i) any such Subsidiary so designated as a
Restricted Subsidiary must be organized under the laws of the United States or
any State thereof, (ii) more than 80% of the Voting Stock of such Subsidiary
must be owned of record and beneficially by the Issuer or a Restricted
Subsidiary and (iii) such Restricted Subsidiary must be a Consolidated
Subsidiary.  

              "Settlement Date" means the settlement date under the ISDA 
Master Agreement (which is the Initial Stated Maturity).  

              "Standard & Poor's" shall mean Standard & Poor's Ratings Group, 
a division of McGraw Hill Inc., and any successor thereto which is a 
nationally recognized statistical rating organization, or if such entity
shall cease to rate the X-TRAS or shall cease to exist and there shall be no
such successor thereto, any other nationally recognized statistical rating
organization selected by the Issuer which is acceptable to the Indenture
Trustee.

              "Subordinated Indebtedness" means any Indebtedness of the Issuer
(whether outstanding on the date of this Sixth Supplemental Indenture or
thereafter incurred) which is contractually subordinated or junior in right of
payment to the X-TRAS.

              "Support Obligations" means, for any person, without duplication,
any financial obligation, contingent or otherwise, of such person guaranteeing
or otherwise supporting any debt or other obligation of any other person in any
manner, whether directly or indirectly, and 


   21
                                     21

including, without limitation, any obligation of such person, direct or
indirect, (i) to purchase or pay (or advance or supply funds for the purchase
or payment of) such debt or to purchase (or to advance or supply funds for the
purchase of) any security for the payment of such debt, (ii) to purchase
property, securities or services for the purpose of assuring the owner of such
debt of the payment of such debt, (iii) to maintain working capital, equity
capital, available cash or other financial statement condition of the primary
obligor so as to enable the primary obligor to pay such debt, (iv) to provide
equity capital under or in respect of equity subscription arrangements (to the 
extent that such obligation to provide equity capital does not otherwise 
constitute debt), or (v) to perform, or arrange for the performance of, any 
non-monetary obligations or non-funded debt payment obligations of the primary 
obligor.

              "Tax-Sharing Agreement" means the Amended and Restated Agreement
for the Allocation of Income Tax Liabilities and Benefits, dated January 1,
1994, as amended or supplemented from time to time, by and among Issuer, each
of the members of the Consolidated Group (as defined therein), and each of the
corporations that become members of the Consolidated Group.

              "Treasury Rate" means the yield to maturity at the time of
computation of United States Treasury securities with a constant maturity (as
compiled and published in the most recent Federal Reserve Statistical Release
H.15(519) (the "Statistical Release") which has become publicly available at
least two Business Days prior to the redemption date or, in the case of
defeasance, prior to the date of deposit (or, if such Statistical Release is no
longer published, any publicly available source of similar market data)) most
nearly equal to the then remaining 


   22

                                     22


average life to stated maturity of the X-TRAS; provided, however, that if the 
average life to stated maturity of the X-TRAS is not equal to the
constant maturity of a United States Treasury security for which a weekly
average yield is given, the Treasury Rate shall be obtained by linear
interpolation (calculated to the nearest one-twelfth of a year) from the weekly
average yields of United States Treasury securities for which such yields are
given.

              "Voting Stock" means securities of any class or classes the
holders of which are ordinarily, in the absence of contingencies, entitled to
vote for corporate directors (or persons performing similar functions).

   
              "Yield" means the yield-to-maturity on the then current 7-year
U.S. Treasury Note as determined by linear interpolation, which shall equal the
sum of (i) 0.6 times the 5-year then current offered-side yield and (ii) 0.4
times the 10-year then current offered-side yield, in each case in respect of
the on-the-run most recently issued U.S. Treasury Notes, as published on
Telerate page 500 as of approximately [12:30 p.m.], New York City time, on the
Exercise Date.  If Telerate 500 is unavailable, "Yield" means the arithmetic
mean of offered-side yields for the then current 7-year U.S. Treasury Note as
determined by linear interpolation, which shall equal the sum of (i) 0.6 times
the 5-year then current offered-side yield and (ii) 0.4 times the 10-year then
current offered-side yield, in each case in respect of the on-the-run most
recently issued U.S. Treasury Notes, without regard to highest and lowest
yields, quoted as of approximately [12:30 p.m.], New York City time, on the
Exercise Date by five primary dealers in U.S. Treasury Notes selected by the
Calculation Agent.
    

   23


                                     23
        
              Certain terms, used principally in Articles Three and Four of
this Sixth Supplemental Indenture, are defined in those Articles.

                                   ARTICLE II

                   DESIGNATION AND TERMS OF THE X-TRAS; FORMS

              SECTION 2.01.  Establishment of Series.  (a) There is hereby
created a series of Securities to be known and designated as the "Extendible
Tenor Rate-Adjusted Securities" and limited in aggregate principal amount
(except as contemplated in Section 2.3(f)(2) of the Indenture) to
[$150,000,000].  If the Yield on the Exercise Date is equal to or greater than
the Reference Treasury Note Yield,the X-TRAS will mature on _____________ __, 
200_ (the "Initial Stated Maturity").  If the Yield on the Exercise
Date is less than the Reference Treasury Note Yield, the maturity of the X-TRAS
will be extended until ______________ __, 201_ (the "Extended Stated
Maturity").

   
              (b)    If the maturity of the X-TRAS is not extended, the X-TRAS
will bear interest from the Original Issue Date to the Initial Stated Maturity, 
or from the most recent date to which interest has been paid or duly provided 
for, at the rate of ____% per annum stated therein until the principal thereof 
is paid or made available for payment.  If the maturity of the X-TRAS is 
extended until the Extended Stated Maturity, the X-TRAS will bear interest from 
the date of closing of the remarketed X-TRAS or from the most recent date to 
which interest has been paid or duly provided for, at such rate per annum as 
may be established pursuant to Article X, until the principal thereof is paid 
or made available 
    


   24

                                     24

for payment.   Interest will be payable semiannually on each Interest
Payment Date and at Maturity, as provided in the form of X-TRAS in Section 2.03
hereof.
        
              (c)    The Record Date referred to in Section 2.3(f)(4) of the
Indenture for the payment of the interest on any X-TRAS payable on any Interest
Payment Date (other than at Maturity) shall be the first day (whether or not a
Business Day) of the calendar month in which such Interest Payment Date occurs
and, in the case of interest payable at Maturity, the Record Date shall be the
date of Maturity.

              (d)    The payment of the principal of, premium (if any) and
interest on the X-TRAS shall not be secured by a security interest in any
property.

   
              (e)    The X-TRAS shall be redeemable at the option of the Issuer
as provided in Section 7.01(b) and (c) hereof.  The holders of X-TRAS shall not
be entitled to any sinking fund payments.  The X-TRAS shall be purchased by the
Issuer at the option of the Holders thereof as provided in Sections 3.01, 4.05
and 7.02 hereof.
    

              (f)    The X-TRAS shall not be convertible.

              (g)    The X-TRAS will not be subordinated to the payment of
Senior Debt.

              (h)    The Issuer will not pay any additional amounts on the
X-TRAS held by a Person who is not a U.S. Person in respect of any tax,
assessment or government charge withheld or deducted.

              (i)    The events specified in Events of Default with respect to
the X-TRAS shall include the events specified in Article Five of this Sixth
Supplemental Indenture.  In addition to 

   25

                                     25

the covenants set forth in Article Three of the Original Indenture, the
Holders of the X-TRAS shall have the benefit of the covenants of the Issuer
set forth in Article Four hereto.

   
              (j)    In the event the maturity of the X-TRAs is extended until 
the Extended Maturity Date, then, unless the Issuer exercises the FD Redemption 
Option (which option the Issuer shall be entitled to exercise at any time 
subsequent to the delivery of the Extension Notice and prior to the earlier of 
the pricing of the remarketing and the Remarketing Deadline), the interest rate 
borne by the X-TRAS will be reset in order that the X-TRAS may be remarketed so 
as to yield proceeds at least sufficient to make available to the Pass Through
Trustee on the Final Distribution Date an amount in cash equal to 100% of the
principal amount thereof plus the ISDA Amount.  The remarketing of the X-TRAS
will be conducted in accordance with the provisions of Article X hereof.
    

              SECTION 2.02.  Forms Generally.  The X-TRAS and Indenture
Trustee's certificates of authentication shall be in substantially the form set
forth in this Article, with such appropriate insertions, omissions,
substitutions and other variations as are required or permitted by the
Indenture, and may have such letters, numbers or other marks of identification
and such legends or endorsements placed thereon as may be required to comply
with the rules of any securities exchange or as may, consistently herewith, be
determined by the officers executing such X-TRAS, as evidenced by their
execution thereof.

   26

                                     26

              The definitive X-TRAS shall be printed, lithographed or engraved
on steel engraved borders or may be produced in any other manner, all as
determined by the officers executing such X-TRAS, as evidenced by their
execution thereof.

              SECTION 2.03.  Form of Face of X-TRAS.

                             CMS ENERGY CORPORATION

        ____% EXTENDIBLE TENOR RATE-ADJUSTED SECURITIES ("X-TRAS(SM)")

No. ________                                                         $__________

   
              CMS Energy Corporation, a corporation duly organized and existing
under the laws of the State of Michigan (herein called the "Issuer", which 
term includes any successor Person under the Indenture hereinafter referred 
to), for value received, hereby promises to pay to _____________________, or 
registered assigns, the principal sum of ____________________ Dollars on 
____________ __, 200_ ("Initial Stated Maturity") or, in the event the maturity
of the X-TRAS is extended to the Extended Stated Maturity, ___________ __, 201_ 
and to pay interest thereon semi-annually on [______ __] and [_________ __] in 
each year, (x) from [        ,] 1998 (the "Original Issue Date") or from the 
most  recent Interest Payment Date to which interest has been paid or duly 
provided  for commencing [______ __,] 1998 at the rate of __% per annum, until 
the  principal hereof is paid or made available for payment on the Initial 
Stated Maturity and (y) in the event the maturity 
    





   27

                                     27

   
of the X-TRAS is extended until the Extended Stated Maturity, from the
date of closing of the remarketed X-TRAS or from the most recent Interest
Payment Date to which interest has been paid or duly provided at such rate as
may be established pursuant to the Remarketing Procedure, until the principal
hereof is paid or made available for payment on the Extended Stated Maturity. 
The amount of interest payable on any Interest Payment Date shall be computed
on the basis of a 360-day year 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 in whose name this
Extendible Tenor Rate-Adjusted Security ("Security") (or one or more
Predecessor X-TRAS) is registered at the close of business on the Record Date
for such interest, which shall be the first day of the calendar month in which
such Interest Payment Date occurs (whether or not a Business Day) except that
the Record Date for interest payable at the Initial Stated Maturity or Extended
Stated Maturity shall be the date of such Initial Stated Maturity or Extended
Stated Maturity.  Any such interest not so punctually paid or duly provided for
will forthwith cease to be payable to the Holder on such Record Date and may
either be paid to the Person in whose name this Security (or one or more
Predecessor X-TRAS) is registered at the close of business on a subsequent
Record Date (which shall be not less than five Business Days prior to the date
of payment of such defaulted interest) for the payment of such defaulted
interest to be fixed by the Indenture Trustee, notice whereof shall be given to
Holders of X-TRAS not less than 15 days preceding such subsequent Record Date.
    

              Payment of the principal of (and premium, if any) and interest,
if any, on this Security will be made at the office or agency of the Issuer
maintained for that purpose in New 

   28

                                     28

   
York, New York (the "Place of Payment"), 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; provided, however, that at the option of
the Issuer payment of interest (other than interest payable at Maturity) may be
made by check mailed to the address of the Person entitled thereto as such
address shall appear in the Security Register or by wire transfer to an account
designated by such Person not later than ten days prior to the date of such
payment.  If the date on which payment of principal or interest on this
Security becomes due is not a Business Day, then such principal or interest
shall be due and payable on the next succeeding Business Day.
    

              Reference is hereby made to the further provisions of this
Security set forth on the reverse hereof, which further provisions shall for
all purposes have the same effect as if set forth at this place.

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

              IN WITNESS WHEREOF, the Issuer has caused this instrument to be
duly executed under its corporate seal.  

Dated:

                                                  CMS ENERGY CORPORATION


                                                  By:__________________________
                                                  Its:

   29

                                     29


                                                  By:__________________________
                                                  Its:


Attest:

              SECTION 2.04.  Form of Reverse of Security.

              This ____% Extendible Tenor Rate-Adjusted Security is one of a
duly authorized issue of securities of the Issuer (herein called the "X-TRAS"),
issued and to be issued under an Indenture, dated as of September 15, 1992, as
supplemented by certain supplemental indentures, including the Sixth
Supplemental Indenture, dated as of _______ __, 1998 (herein collectively
referred to as the "Indenture"), between the Issuer and NBD Bank, a Michigan
banking corporation (formerly known as NBD Bank, National Association), as
Indenture Trustee (herein called the "Indenture 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 Issuer, the Indenture Trustee, the Holders of the X-TRAS and of the terms
upon which the X-TRAS are, and are to be, authenticated and delivered.  This
Security is one of the series designated on the face hereof, limited in
aggregate principal amount to [$150,000,000].

   

              The X-TRAS will be redeemable at any time, at the option of the 
Issuer, in whole or in part,  on any date on or prior to the Premium
Termination Date on not less than 30 nor more than 60 days' notice to the
    

   30

                                     30

   
Indenture Trustee, the Pass Through Trustee and the Extension Option Buyer, at
a redemption price ("Early Redemption Price") equal to the sum of (i) 100% of
the principal amount of the X-TRAS being redeemed, together with accrued
interest, if any, thereon to the Redemption Date plus the Applicable Premium
(but interest installments whose Stated Maturity is on or prior to the
Redemption Date will be payable to the Holder thereof of record at the close of
business on the relevant Record Date referred to on the face hereof all as
provided in the Indenture) plus (ii) the ISDA Amount, if any, as determined by
the Extension Option Buyer and notified to the Issuer, the Indenture Trustee
and the Pass Through Trustee [five] Business Days prior to the Redemption Date. 
In no event will the Early Redemption Price calculated pursuant to the
foregoing clause (i) ever be less than 100% of the principal amount of the
X-TRAS plus accrued interest to the Redemption Date.  The Notional Amount used
to determine the ISDA Amount shall be equal to the aggregate principal amount
of X-TRAS redeemed.
    
        
              The following definitions are used to determine the
Applicable Premium:

   
              "Applicable Premium" means, with respect to X-TRAS (or portion
thereof) being redeemed at any time, the excess of (A) the present value at
such time of the principal amount of such X-TRAS (or portion thereof) being
redeemed plus all interest payments due on such X-TRAS (or portion thereof) to
the date of redemption, which present value shall be computed using a
discount rate equal to the Treasury Rate plus 50 basis points, over (B) the
principal amount of such X-TRAS (or portion thereof) being redeemed at such
time.  For 
    

   31

                                     31

purposes of this definition, the present values of interest and principal 
payments will be determined in accordance with generally accepted principles 
of financial analysis.

              "Treasury Rate" means the yield to maturity at the time of
computation of United States Treasury securities with a constant maturity (as
compiled and published in the most recent Federal Reserve Statistical Release
H.15(519) (the "Statistical Release") which has become publicly available at
least two Business Days prior to the redemption date or, in the case of
defeasance, prior to the date of deposit (or, if such Statistical Release is no
longer published, any publicly available source of similar market data)) most
nearly equal to the then remaining average life to stated maturity of the
X-TRAS; provided, however, that if the average life to stated maturity of the
X-TRAS is not equal to the constant maturity of a United States Treasury
security for which a weekly average yield is given, the Treasury Rate shall be
obtained by linear interpolation (calculated to the nearest one-twelfth of a
year) from the weekly average yields of United States Treasury securities for
which such yields are given.

              In the event of redemption of the X-TRAS in part, new X-TRAS for
the unredeemed portion thereof will be issued in the name of the Holder thereof
upon cancellation hereof.

   
              If the X-TRAS are extended until the Extended Stated Maturity,
the Issuer shall have the option (the "FD Redemption Option"), in lieu of
permitting the X-TRAS to be remarketed in accordance with Section 8.01 of the
Indenture, to redeem the X-TRAS in whole on the Initial Stated Maturity
    

   32

                                     32

   
, by irrevocable notice given to the Indenture Trustee, the Pass Through
Trustee, the Extension Option Buyer and the Calculation Agent not later than
the Remarketing Deadline, at a redemption price, payable in cash, equal to the
sum of (i) 100% of the  principal amount of the X-TRAS being redeemed together
with accrued interest, if any, thereon to the Initial Stated Maturity plus (ii)
the ISDA Amount, if any, as of the Exercise Date (as calculated by the 
Calculation Agent and notified to the Issuer, the Indenture Trustee and the 
Pass Through Trustee within five Business Days thereafter), which redemption 
price shall be payable at the Initial Stated Maturity.  The Notional Amount 
used to determine the ISDA Amount shall be the aggregate principal amount of 
the X-TRAS outstanding as of the Exercise Date.
    

              If a Change in Control occurs, the Issuer shall notify the Holder
of this Security, the Indenture Trustee, the Pass Through Trustee and the
Extension Option Buyer of such occurrence and each Holder shall have the right
to require the Issuer to make a Required Repurchase of all or any part of this
Security at a Change in Control Purchase Price equal ( ) 101% of the
principal amount of the X-TRAS to be so purchased together with accrued
interest thereon to the date of repurchase plus, (in the aggregate with all
other X-TRAS repurchased pursuant to such Required Repurchase) the ISDA Amount,
if any, as of such date of repurchase as determined by the Extension Option
Buyer and notified to the Issuer, the Indenture Trustee and the Pass Through
Trustee by 10 a.m., New York City time, on such date, as more fully provided in
the Indenture and subject to the terms and conditions set forth therein.  

   33
                                     33

In the event of a Required Repurchase of only a portion of this
Security, a new Security or Notes for the unrepurchased portion hereof will be
issued in the name of the Holder hereof upon the cancellation hereof.

   
              In the event that the Issuer has Excess Proceeds from an Asset
Sale, it shall be required to make an offer to purchase from Holders on a pro
rata basis an aggregate principal amount of X-TRAS equal to the Excess
Proceeds, at a purchase price equal to the sum of (i) 100% of the principal
amount of and unpaid interest, if any, to the purchase date on such X-TRAS,
plus (ii) (in the aggregate with all other X-TRAS repurchased pursuant to such
Excess Proceeds Offer) the ISDA Amount as determined by the Extension Option
Buyer and notified to the Issuer, the Indenture Trustee and the Pass Through
Trustee by 10 a.m., New York City time, on such date of repurchase. The
procedures to be followed by the Issuer in making such an offer, and for 
acceptance of such offer by Holders, shall be the same as those set forth
in the Indenture with respect to a Change in Control.
    

   
              If the maturity of the X-TRAS is extended and for any reason the
Pass Through Trustee does not receive an amount in cash equal to the principal
amount of and interest on the X-TRAS plus the ISDA Amount by the Remarketing
Deadline, the Holders of the X-TRAS will be deemed to have exercised the Put
Option and required the Issuer to purchase all of the outstanding X-TRAS on the
Initial Stated Maturity at a purchase price equal to 100% of the principal 
amount of and interest on the X-TRAS.
    

   34

                                     34

              If an Event of Default with respect to this Security shall occur
and be continuing, the principal of this Security may be declared due and
payable in the manner and with the effect provided in the Indenture.  If any
such acceleration occurs, the Issuer will also be obligated to pay the
ISDA Amount, if any, as of the date of such acceleration, as determined by
the Extension Option Buyer and notified to the Issuer, the Indenture Trustee
and the Pass Through Trustee within [five] Business Days after the date of such
acceleration.

              In any case where any Interest Payment Date, repurchase date,
Stated Maturity or Maturity of any Security shall not be a Business Day at any
Place of Payment, then (notwithstanding any other provision of the Indenture or
this Security), payment of interest or principal (and premium, if any) need not
be made at such Place of Payment on such date, but may be made on the next
succeeding Business Day at such Place of Payment with the same force and effect
as if made on the Interest Payment Date, repurchase date or at the Stated
Maturity or Maturity; provided that no interest shall accrue on the amount so
payable for the period from and after such Interest Payment Date, redemption 
date, repurchase date, Stated Maturity or Maturity, as the case may be, to 
such Business Day.

              The Indenture contains provisions for defeasance at any time of
(i) the entire indebtedness of this Security or (ii) certain restrictive 
covenants and Events of Default with respect to this Security, in each case 
upon compliance with certain conditions set forth therein.

              The Indenture permits, with certain exceptions as therein
provided, the amendment thereof and the modification of the rights and
obligations of the Issuer and the rights of the Holders of all Outstanding
X-TRAS under the Indenture at any time by the Issuer and the 

   35
                                     35

Indenture Trustee with the consent of the Holders of not less than a
majority in principal amount of Securities of all series then Outstanding and
affected (voting as one class).  No such amendment or modification may be made
to the Indenture which has a material adverse effect on the Extension Option
Buyer without the consent of the Extension Option Buyer.

              The Indenture permits the Holders of not less than a majority in
principal amount of Securities of all series at the time Outstanding with
respect to which a default shall have occurred and be continuing (voting as one
class) to waive on behalf of the Holders of all Outstanding Securities of such
series any past default by the Issuer, provided that no such waiver may be made
with respect to a default in the payment of the principal of or the interest on
any Security of such series or the default by the Issuer in respect of certain
covenants or provisions of the Indenture, the modification or amendment of
which must be consented to by the Holder of each Outstanding Security of each
series affected or by the Extension Option Buyer, as the case may be.

              As set forth in, and subject to, the provisions of the Indenture,
no Holder of any Securities of any series will have any right to institute any
proceeding with respect to the Indenture or for any remedy thereunder, unless
such Holder shall have previously given to the Indenture Trustee written notice
of a continuing Event of Default, the Holders of not less than 25% in principal
amount of the Outstanding Securities of each affected series (voting as one
class) shall have made written request, and offered reasonable indemnity, to
the Indenture Trustee to institute such proceeding as trustee, and the
Indenture Trustee shall not have received from the Holders of a majority in
principal amount of the Outstanding Securities of each affected 

   36

                                     36

   
series (voting as one class) a direction inconsistent with such request
and shall have failed to institute such proceeding within 60 days; provided,
however, that such limitations do not apply to a suit instituted by the Holder
hereof for the enforcement of payment of the principal of (and premium, if any)
or any interest on this Security on or after the respective due dates expressed
herein.
    

              No reference herein to the Indenture and no provision of this
Security or of the Indenture shall alter or impair the obligation of the
Issuer, which is absolute and unconditional, to pay the principal of and any
premium and interest on this Security 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 Security is registerable in the
Security Register, upon surrender of this Security for registration of transfer
at the office or agency of the Issuer in any place where the principal of and
any premium and interest on this Security are payable, duly endorsed by, or
accompanied by a written instrument of transfer in form satisfactory to the
Issuer and the Security Registrar duly executed by, the Holder hereof or his
attorney duly authorized in writing, and thereupon one or more new Securities
of this series and of like tenor, of authorized denominations and for the same
aggregate principal amount, will be issued to the designated transferee or
transferees.

              The X-TRAS are 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 set forth, X-TRAS are
exchangeable for a like aggregate 

   37

                                     37

principal amount of X-TRAS and of like tenor of a different authorized
denomination, as requested by the Holder surrendering the same.

              No service charge shall be made for any such registration of
transfer or exchange, but the Issuer may require payment of a sum sufficient to
cover any tax or other governmental charge payable in connection therewith.

              The Issuer shall not be required to (a) issue, exchange or
register the transfer of this Security for a period of 15 days next preceding
the mailing of the notice of redemption of X-TRAS or (b) exchange or register
the transfer of any Security or any portion thereof selected, called or being
called for redemption, except in the case of any Security to be redeemed in
part, the portion thereof not so to be redeemed.

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

              All terms used in this Security without definition which are 
defined in the Indenture shall have the meanings assigned to them in the 
Indenture.

              SECTION 2.05.  Form of Indenture Trustee's Certificate of
Authentication.  The Indenture Trustee's certificates of authentication shall
be in substantially the following form:

   38

                                     38

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


                                                 _______________________________
                                                      as Indenture Trustee


                                                 By:____________________________
                                                       Authorized Officer


                                  ARTICLE III

                               CHANGE IN CONTROL

              SECTION 3.01.  Change in Control.  Upon the occurrence of a
Change in Control (the effective date of such Change in Control being the
"Change in Control Date"), each Holder of X-TRAS shall have the right to
require that the Issuer repurchase (a "Required Repurchase") all or any part of
such Holder's X-TRAS at a repurchase price  payable in cash equal to
101% of the principal amount of such X-TRAS plus accrued interest to the Change
in Control Purchase Date (as defined below) (the "Change in Control Purchase 
Price") plus (in the aggregate with all other X-TRAS repurchased pursuant to 
this Section 3.01) the ISDA Amount, if any, as of the Change in Control 
Purchase Date as determined by the Extension Option Buyer and notified to the 
Issuer, the Indenture Trustee and the Pass Through Trustee by 10 a.m., 
New York City time, on such date. The Notional Amount used to determine the  
Extension Amount shall be equal to the aggregate principal amount of X-TRAS 
tendered for repurchase and not withdrawn.

   39

                                     39

              (a)    Within 30 days following the Change in Control Date, the
       Issuer shall mail a notice (the "Required Repurchase Notice") to each
       Holder with copies to the Indenture Trustee, Pass Through Trustee and
       Extension Option Buyer stating:

                     (i)    that a Change in Control has occurred and that such
              Holder has the right to require the Issuer to repurchase all or
              any part of such Holder's X-TRAS at the Change in Control
              Purchase Price;

                     (ii)   the Change in Control Purchase Price;

                     (iii)  the date on which any Required Repurchase shall be
              made (which shall be no earlier than 60 days nor later than 90
              days from the date such notice is mailed) (the "Change in Control
              Purchase Date");

                     (iv)   the name and address of the Paying Agent; and

                     (v)    the procedures that Holders must follow to cause
              the X-TRAS to be repurchased, which shall be consistent with this
              Section and the Indenture.  

              (b)    Holders electing to have X-TRAS repurchased must deliver 
       a written notice (the "Change in Control Purchase Notice") to the
       Paying Agent (initially the Indenture Trustee) at its corporate trust 
       office in Detroit, Michigan, or any other office of the Paying Agent 
       maintained for such purposes, not later than 30 days prior to the 
       Change in Control Purchase Date. The Change in Control Purchase Notice 
       shall state: (i) the portion of the principal amount of any X-TRAS to be
       repurchased, which portion must be $1,000 or an integral multiple 
       thereof; (ii) that such X-TRAS are to be repurchased by the Issuer 
       pursuant to the change in control provisions of the Indenture; 

   40

                                     40


       and (iii) unless the X-TRAS are represented by one or more Global
       Notes, the certificate numbers of the X-TRAS to be delivered by the
       Holder thereof for repurchase by the Issuer.  Any Change in Control
       Purchase Notice may be withdrawn by the Holder by a written notice of
       withdrawal delivered to the Paying Agent not later than three Business
       Days prior to the Change in Control Purchase Date. The notice of
       withdrawal shall state the principal amount and, if applicable, the
       certificate numbers of the X-TRAS as to which the withdrawal notice
       relates and the principal amount of such X-TRAS, if any, which remains
       subject to a Change in Control Purchase Notice.

           (c)    Payment of the Change in Control Purchase Price for X-TRAS for
       which a Change in Control Purchase Notice has been delivered and not
       withdrawn is conditioned upon delivery of such X-TRAS (together with
       necessary endorsements) to the Paying Agent at its office in Detroit,
       Michigan, or any other office of the Paying Agent maintained for such
       purpose, at any time (whether prior to, on or after the Change in
       Control Purchase Date) after the delivery of such Change in Control
       Purchase Notice.  Payment of the Change in Control Purchase Price for
       such X-TRAS will be made promptly following the later of the Change in
       Control Purchase Date or the time of delivery of such X-TRAS.  If the
       Paying Agent holds, in accordance with the terms of the Indenture, money
       sufficient to pay the Change in Control Purchase Price of such X-TRAS on
       the Business Day following the Change in Control Purchase Date, then, on
       and after such date, interest will cease accruing, and all other rights
       of the Holder shall 

   41
                                     41

       terminate (other than the right to receive the Change in Control
       Purchase Price upon delivery of the X-TRAS).

              (d)    The Issuer shall comply with the provisions of Regulation
       14E and any other tender offer rules under the Exchange Act, which may
       then be applicable in connection with any offer by the Issuer to
       repurchase X-TRAS at the option of Holders upon a Change in Control.

              (e)    No X-TRAS may be repurchased by the Issuer as a result of
       a Change in Control if there has occurred and is continuing an Event of
       Default (other than a default in the Payment of the Change in Control
       Purchase Price with respect to the X-TRAS).

                                   ARTICLE IV

                       ADDITIONAL COVENANTS OF THE ISSUER
                           WITH RESPECT TO THE X-TRAS

   

              SECTION 4.01.  Limitation on Certain Liens.  So long as any of the
X-TRAS are outstanding, the Issuer shall not create, incur, assume or suffer to
exist any Lien or any other type of arrangement intended or having the effect
of conferring upon a creditor of the Issuer or any Subsidiary a preferential
interest upon or with respect to any of its property of any character,
including without limitation any shares of Capital Stock of Consumers or
Enterprises, without making effective provision whereby the X-TRAS shall (so
long as any such other 
    

   42

                                     42


creditor shall be so secured) be equally and ratably secured (along
with any other creditor similarly entitled to be secured) by a direct Lien on
all property subject to such Lien, provided, however, that the foregoing
restrictions shall not apply to:
        
              (i)    Liens for taxes, assessments or governmental charges or
          levies to the extent not past due; 

              (ii)   pledges or deposits to secure (a) obligations under 
          workmen's compensation laws or similar legislation, (b) statutory 
          obligations of the Issuer or (c) Support Obligations at any one time
          outstanding;

              (iii)  Liens imposed by law, such as materialmen's, mechanics',
          carriers', workmen's and repairmen's Liens and other similar Liens
          arising in the ordinary course of business securing obligations which
          are not overdue or which have been fully bonded and are being 
          contested in good faith;

   
              (iv)   purchase money Liens upon or in property acquired and
          held  by the Issuer in the ordinary course of business to secure the 
          purchase price of such property or to secure Indebtedness incurred 
          solely for the purpose of financing the acquisition of any such 
          property to be subject to such Liens, or Liens existing on any such 
          property at the time of acquisition, or extensions, renewals or
          replacements of any of the foregoing for the same or a lesser amount,
          provided that no such Lien shall extend to or cover any property
          other than the property being acquired and no such extension, renewal
          or replacement shall extend to or cover property not theretofore
          subject to the Lien being extended, renewed or replaced, and
          provided, further, that the aggregate principal
    

   43
                                     43
      
       amount of the Indebtedness at any one time outstanding secured by Liens  
       permitted by this clause (iv) shall not exceed $10,000,000; and

   
              (v)    Liens not otherwise permitted by clauses (i) through (iv)
       of this Section securing Indebtedness of the Issuer; provided that on
       the date such Liens are created, and after giving effect to such
       Indebtedness, the aggregate principal amount at maturity of all of the
       secured Indebtedness of the Issuer at such date shall not exceed 5% of
       Consolidated Net Tangible Assets at such date.
    

   
              SECTION 4.02.  Limitation on Consolidation, Merger, Sale or
Conveyance of Assets.  So long as any of the X-TRAS are Outstanding and until
senior unsecured debt of the Issuer is rated BBB- or above (or an equivalent
rating) by Standard & Poor's and one Other Rating Agency (or, if Standard &
Poor's shall change its rating system, an equivalent of such rating then
employed by such organization), at which time the Issuer will be permanently
released from the provisions of this Section 4.02, and subject also to Article
Nine of the Indenture,  the Issuer shall not consolidate with or merge into any
other Person or sell, lease or convey the property of the Issuer in the
entirety or substantially as an entirety, unless (i) immediately after giving
effect to such transaction the Consolidated Net Worth of the surviving entity
is at least equal to the Consolidated Net Worth of the Issuer immediately 
prior to the transaction, and (ii) after giving effect to such transaction, 
the surviving entity would be entitled to incur at least one dollar of 
additional Indebtedness (other than revolving Indebtedness to banks) without 
violation of the limitations in Section 4.03 hereof.
    

   44

                                     44

   
              SECTION 4.03.  Limitation on Consolidated Indebtedness.  (a)  So
long as any of the senior unsecured debt of the Issuer is Outstanding and until
the senior unsecured debt of the Issuer is rated BBB- or above (or an equivalent
rating) by Standard & Poor's and one Other Rating Agency (or, if Standard &
Poor's shall change its rating system, an equivalent of such rating then
employed by such organization), at which time the Issuer will be permanently
released from the provisions of this Section 4.03, the Issuer shall not, and
shall not permit any Consolidated Subsidiary of the Issuer to, issue, create,
assume, guarantee, incur or otherwise become liable for (collectively,
"issue"), directly or indirectly, any Indebtedness unless the Consolidated
Coverage Ratio of the Issuer and its Consolidated Subsidiaries for the four
consecutive fiscal quarters immediately preceding the issuance of such
Indebtedness (as shown by a pro forma consolidated income statement of the
Issuer and its Consolidated Subsidiaries for the four most recent fiscal
quarters ending at least 30 days prior to the issuance of such Indebtedness
after giving effect to (i) the issuance of such Indebtedness and (if
applicable) the application of the net proceeds thereof to refinance other
Indebtedness as if such Indebtedness was issued at the beginning of the period,
(ii) the issuance and retirement of any other Indebtedness since the first day
of the period as if such Indebtedness was issued or retired at the beginning of
the period and (iii) the acquisition of any company or business acquired by the
Issuer or any Subsidiary since the first day of the period (including
giving effect to the pro forma historical earnings of such company or
business), including any acquisition which will be consummated
contemporaneously with the issuance of such Indebtedness, as if in each case
such acquisition occurred at the beginning of the period) exceeds a ratio of
1.7 to 1.0.
    

   45

                                     45

              (b)    Notwithstanding the foregoing paragraph, the Issuer or any
Restricted Subsidiary may issue, directly or indirectly, the following
Indebtedness:

              (1)    Indebtedness of the Issuer to banks not to exceed
       $1,000,000,000 in aggregate outstanding principal amount at any
       time; 

   
              (2)    Indebtedness (other than Indebtedness described in
       clause (1) of this Subsection) outstanding on the date of this Sixth
       Supplemental Indenture, as set forth on Schedule 4.03(b)(2) attached
       hereto and made a part hereof, and Indebtedness issued in exchange for,
       or the proceeds of which are used to refund or refinance, any
       Indebtedness permitted by this clause (2); provided, however, that (i)
       the principal amount (or accreted value in the case of Indebtedness
       issued at a discount) of the Indebtedness so issued shall not exceed the
       principal amount (or accreted value in the case of Indebtedness issued
       at a discount) of, premium, if any, and accrued but unpaid interest on,
       the Indebtedness so exchanged, refunded or refinanced and (ii) the
       Indebtedness so issued (A) shall not mature prior to the stated maturity
       of the Indebtedness so exchanged, refunded or refinanced, (B) shall have
       an Average Life equal to or greater than the remaining Average Life of
       the Indebtedness so exchanged, refunded or refinanced and (C) if the
       Indebtedness to be exchanged, refunded or refinanced is subordinated to
       the X-TRAS, the Indebtedness is subordinated to the X-TRAS in right of
       payment;
    

              (3)    Indebtedness of the Issuer owed to and held by a
       Subsidiary and Indebtedness of a Subsidiary owed to and held by the
       Issuer; provided, however, that, in the case of Indebtedness of the
       Issuer owed to and held by a Subsidiary, (i) any 

   46
                                     46

       subsequent issuance or transfer of any Capital Stock that results in any
       such Subsidiary ceasing to be a Subsidiary or (ii) any transfer of such 
       Indebtedness (except to the Issuer or a Subsidiary) shall be deemed for 
       the purposes of this Subsection to constitute the issuance of such 
       Indebtedness by the Issuer;

              (4)    Indebtedness of the Issuer issued in exchange for, or the
       proceeds of which are used to refund or refinance, Indebtedness of the
       Issuer issued in accordance with Subsection (a) of this Section,
       provided that (i) the principal amount (or accreted value in the case of
       Indebtedness issued at a discount) of the Indebtedness so issued shall
       not exceed the principal amount (or accreted value in the case of
       Indebtedness issued at a discount) of, premium, if any, and accrued but
       unpaid interest on, the Indebtedness so exchanged, refunded or
       refinanced and (ii) the Indebtedness so issued (A) shall not mature
       prior to the stated maturity of the Indebtedness so exchanged, refunded
       or refinanced, (B) shall have an Average Life equal to or greater than
       the remaining Average Life of the Indebtedness so exchanged, refunded or
       refinanced and (C) if the Indebtedness to be exchanged, refunded or
       refinanced is subordinated to the X-TRAS, the Indebtedness so issued is
       subordinated to the X-TRAS in right of payment;

              (5)    Indebtedness of a Restricted Subsidiary issued in exchange
       for, or the proceeds of which are used to refund or refinance,
       Indebtedness of a Restricted Subsidiary issued in accordance with
       Subsection (a) of this Section, provided that (i) the principal amount
       (or accreted value in the case of Indebtedness issued at a discount) of
       the Indebtedness so issued shall not exceed the principal amount (or 
       accreted value in the

   47

                                     47


       case of Indebtedness issued at a discount) of, premium, if any, and
       accrued but unpaid interest on, the Indebtedness so exchanged, refunded
       or refinanced and (ii) the Indebtedness so issued (A) shall not mature
       prior to the stated maturity of the Indebtedness so exchanged, refunded
       or refinanced and (B) shall have an Average Life equal to or greater
       than the remaining Average Life of the Indebtedness so exchanged,
       refunded or refinanced.

              (6)    Indebtedness of a Consolidated Subsidiary issued to
       acquire, develop, improve, construct or to provide working capital for a
       gas, oil or electric generation, exploration, production, distribution,
       storage or transmission facility and related assets, provided that such
       Indebtedness is without recourse to any assets of the Issuer, Consumers,
       Enterprises, CMS Generation, NOMECO, CMS Electric and Gas, CMS Gas
       Transmission and Storage, CMS MST or any other Designated Enterprises
       Subsidiary;

              (7)    Indebtedness of a Person existing at the time at which
       such person became a Subsidiary and not incurred in connection with, or
       in contemplation of, such Person becoming a Subsidiary.  Such
       Indebtedness shall be deemed to be incurred on the date the acquired
       Person becomes a Consolidated Subsidiary;

              (8)    Indebtedness issued by the Issuer not to exceed
       $150,000,000 in aggregate principal amount at any time; and 

              (9)    Indebtedness of a Consolidated Subsidiary in respect of 
       rate reduction bonds issued to recover electric restructuring
       transition costs of Consumers provided that such Indebtedness is without
       recourse to the assets of Consumers.  

   48

                                     48

              SECTION 4.04.  Limitation on Restricted Payments.  (a) So long 
as the X-TRAS are Outstanding and until senior unsecured debt of the 
Issuer is rated BBB- or above (or an equivalent rating) by Standard &
Poor's and one Other Rating Agency (or, if Standard & Poor's shall change its
rating system, an equivalent of such rating then employed by such
organization), at which time the Issuer will be permanently released from the
provisions of this Section 4.04, the Issuer shall not, and shall not permit any
Restricted Subsidiary of the Issuer, directly or indirectly, to (i) declare or
pay any dividend or make any distribution on the Capital Stock of the Issuer to
the direct or indirect holders of its Capital Stock (except dividends or
distributions payable solely in its Non-Convertible Capital Stock or in
options, warrants or other rights to purchase such Non-Convertible Capital
Stock and except dividends or distributions payable to the Issuer or a
Subsidiary), (ii) purchase, redeem or otherwise acquire or retire for value any
Capital Stock of the Issuer, or (iii) purchase, repurchase, redeem, defease or
otherwise acquire or retire for value, prior to scheduled maturity or scheduled
repayment thereof, any Subordinated Indebtedness (any such dividend,
distribution, purchase, redemption, repurchase, defeasing, other acquisition or
retirement being hereinafter referred to as a "Restricted Payment") if at the
time the Issuer or such Subsidiary makes such Restricted Payment:

              (1)    an Event of Default, or an event that with the lapse of
       time or the giving of notice or both would constitute an Event of
       Default, shall have occurred and be continuing (or would result
       therefrom); or

              (2)    the aggregate amount of such Restricted Payment and all
       other Restricted Payments made since May 6, 1997 would exceed the sum
       of:

   49

                                     49

                     (A)    $100,000,000;

                     (B)    100% of Consolidated Net Income, accrued during the
              period (treated as one accounting period) from May 6, 1997 to the
              end of the most recent fiscal quarter ending at least 45 days
              prior to the date of such Restricted Payment (or, in case such
              sum shall be a deficit, minus 100% of the deficit); and

                     (C)    the aggregate Net Cash Proceeds received by the
              Issuer from the issue or sale of or contribution with respect to
              its Capital Stock subsequent to May 6, 1997.

For the purpose of determining the amount of any Restricted Payment not in the
form of cash, the amount shall be the fair value of such Restricted Payment as
determined in good faith by the Board of Directors, provided that if the value
of the non-cash portion of such Restricted Payment as determined by the Board
of Directors is in excess of $25 million, such value shall be based on the
opinion from a nationally recognized firm experienced in the appraisal of
similar types of transactions.

              (b)    The provisions of Section 4.04(a) shall not prohibit:


                     (i)    any purchase or redemption of Capital Stock of the
              Issuer made by exchange for, or out of the proceeds of the
              substantially concurrent sale of, Capital Stock of the Issuer
              (other than Redeemable Stock or Exchangeable Stock); provided,
              however, that such purchase or redemption shall be excluded from
              the calculation of the amount of Restricted Payments;

   50


                                     50

                     (ii)   dividends or other distributions paid in respect of
              any class of the Issuer's Capital Stock issued in respect of the
              acquisition of any business or assets by the Issuer or a
              Restricted Subsidiary if the dividends or other distributions
              with respect to such Capital Stock are payable solely from the
              net earnings of such business or assets;

                     (iii)  dividends paid within 60 days after the date of
              declaration thereof if at such date of declaration such dividend
              would have complied with this Section; provided, however, that at
              the time of payment of such dividend, no Event of Default shall
              have occurred and be continuing (or result therefrom), and
              provided further, however, that such dividends shall be included
              (without duplication) in the calculation of the amount of
              Restricted Payments; or

                     (iv)   payments pursuant to the Tax-Sharing Agreement.

              SECTION 4.05.  Limitation on Asset Sales.  So long as any of the
X-TRAS are outstanding, the Issuer may not sell, transfer or otherwise dispose
of any property or assets of the Issuer, including Capital Stock of any
Consolidated Subsidiary, in one transaction or a series of transactions in an
amount which exceeds $50,000,000 (an "Asset Sale") unless the Issuer shall
(i) apply an amount equal to such excess Net Cash Proceeds to permanently repay
Indebtedness of a Consolidated Subsidiary or Indebtedness of the Issuer which
is pari passu with the X-TRAS or (ii) invest an equal amount not so used in
clause (i) in property or assets of related business within 24 months after the
date of the Asset Sale (the "Application Period") or (iii) apply such excess
Net Cash Proceeds not so used in (i) or (ii) (the "Excess Proceeds") to make an
offer (the 

   51
                                     51


   
"Excess Proceeds Offer"), within 30 days after the end of the
Application Period, to purchase (the "Excess Proceeds Repurchase") from the
Holders on a pro rata basis an aggregate principal amount of X-TRAS on the
Excess Proceeds Purchase Date (as defined herein) equal to the Excess Proceeds
on such date, at a purchase price equal to 100% of the principal amount of the
X-TRAS on the Excess Proceeds Purchase Date and unpaid interest, if any, to
such date (the "Excess Proceeds Repurchase Price") plus (in the aggregate with
all other X-TRAS repurchased pursuant to such Excess Proceeds Offer) the ISDA
Amount, if any, as of the Excess Proceeds Purchase Date as determined by the
Extension Option Buyer as of such date and notified to the Issuer, the
Indenture Trustee and the Pass Through Trustee by 10 a.m., New York City time,
on such date.  The Notional Amount used to determine the ISDA Amount shall be
equal to the aggregate principal amount of X-TRAS tendered for repurchase and
not withdrawn. The Issuer shall only be required to make an offer to purchase
X-TRAS from Holders pursuant to subsection (iii) if the Excess Proceeds equal
or exceed $25,000,000 at any given time.  
    
        
              (a)    Within 30 days after the end of the Application Period,
       the Issuer shall mail a notice (the "Excess Proceeds Repurchase Notice")
       to each Holder with copies to the Indenture Trustee, Pass Through
       Trustee and Extension Option Buyer stating:

                    (i)    that the Issuer is making an Excess Proceeds Offer
              pusuant to Section 4.05 of the Sixth Supplemental Indenture; 

                    (ii)   the Excess Proceeds Purchase Price;

   52

                                     52

                    (iii)  the date on which any Exceeds Proceeds Repurchase
              shall be made (which shall be no earlier than 60 days nor later
              than 90 days from the date such notice is mailed) (the "Excess
              Proceeds Purchase Date");

                    (iv)   the name and address of the Paying Agent; and

                    (v)    the procedures that Holders must follow to cause
              the X-TRAS to be repurchased, which shall be consistent with this
              Section and the Indenture.  

              (b)   Holders electing to have X-TRAS repurchased must deliver 
       a written notice (the "Excess Proceeds Purchase Notice") to the
       Paying Agent (initially the Indenture Trustee) at its corporate trust
       office in Detroit, Michigan, or any other office of the Paying Agent
       maintained for such purposes, not later than 30 days prior to the Excess
       Proceeds Purchase Date.  The Excess Proceeds Purchase Notice shall
       state: (i) the portion of the principal amount of any X-TRAS to be
       repurchased, which portion must be $1,000 or an integral multiple
       thereof; (ii) that such X-TRAS are to be repurchased by the Issuer
       pursuant to the Exceeds Proceeds Offer provisions of the Indenture; and
       (iii) unless the X-TRAS are represented by one or more Global Notes, the
       certificate numbers of the X-TRAS to be delivered by the Holder thereof
       for repurchase by the Issuer.  Any Excess Proceeds Purchase Notice may
       be withdrawn by the Holder by a written notice of withdrawal delivered
       to the Paying Agent not later than three Business Days prior to the 
       Excess Proceeds Purchase Date.  The notice of withdrawal shall state 
       the principal amount and, if applicable, the certificate numbers of the
       X-TRAS 

   53

                                     53

   
       as to which the withdrawal notice relates and the principal amount of 
       such X-TRAS, if any, which remain subject to an Excess Proceeds Purchase
       Notice.
    

              (c)    Payment of the Excess Proceeds Purchase Price for X-TRAS
       for which a Excess Proceeds Purchase Notice has been delivered and not
       withdrawn is conditioned upon delivery of such X-TRAS (together with
       necessary endorsements) to the Paying Agent at its office in Detroit,
       Michigan, or any other office of the Paying Agent maintained for such
       purpose, at any time (whether prior to, on or after the Excess Proceeds
       Purchase Date) after the delivery of such Excess Proceeds Purchase
       Notice.  Payment of the Excess Proceeds Purchase Price for such X-TRAS
       will be made promptly following the later of the Excess Proceeds
       Purchase Date or the time of delivery of such X- TRAS.  If the Paying
       Agent holds, in accordance with the terms of the Indenture, money
       sufficient to pay the Excess Proceeds Purchase Price of such X-TRAS on
       the Business Day following the Excess Proceeds Purchase Date, then, on
       and after such date, interest will cease accruing, and all other rights
       of the Holder shall terminate (other than the right to receive the
       Excess Proceeds Purchase Price upon delivery of the X-TRAS).

              (d)    The Issuer shall comply with the provisions of Regulation
       14E and any other tender offer rules under the Exchange Act, which may
       then be applicable in connection with any Excess Proceeds Offer.


                                   ARTICLE V

   54

                                     54


                          ADDITIONAL EVENTS OF DEFAULT
                           WITH RESPECT TO THE X-TRAS

   
              SECTION 5.01.  Definition.  All of the events specified in
clauses (a) through (h) of Section 5.1 of the Original Indenture shall be
"Events of Default" with respect to the X-TRAS.  In addition, each of the
following events that shall have occurred and be continuing shall be an
Event of Default: (i) default in the payment when due of any Applicable Premium
on any of the X-TRAS, whether at maturity, upon redemption, acceleration,
purchase by the Issuer at the option of the Holders or otherwise; and (ii)
default in the payment when due of the ISDA Amount, if any, whether on the
Initial Stated Maturity, upon redemption, acceleration, purchase by the Issuer
at the option of the Holders or otherwise.
    

              SECTION 5.02.  Amendments to Section 5.1 of the Original
Indenture.  (a)  Solely for the purpose of determining Events of Default with
respect to the X-TRAS, paragraphs (e), (f) and (h) of Section 5.1 of the
Original Indenture shall be amended such that each and every reference therein
to the Issuer shall be deemed to mean either the Issuer or Consumers.

              (b)    Solely for purposes of determining waivers of defaults and
their consequences in respect of the X-TRAS, the penultimate paragraph of
Section 5.1 of the Original Indenture shall be amended such that no such waiver
may be made of any such default in respect of a covenant or provision of the
Sixth Supplemental Indenture which cannot be modified or amended without the
consent of each Holder of the X-TRAS or the Extension Option Buyer without the
consent of such Holder or buyer, respectively.

   55

                                     55

              (c)    Solely for purposes of determining the application of
proceeds in respect of defaults under the X-TRAS, paragraphs SECOND and  THIRD
of Section 5.3 of the Original Indenture shall be amended to provide that
proceeds paid thereunder shall be applied on a pro rata basis to (i) the
payment in full of the aggregate unpaid principal amount of the X-TRAS and
all accrued but unpaid interest on the X-TRAS to the Interest Payment Date and
(ii) the payment of the amount due under Section 5.03 of this Sixth
Supplemental Indenture.

   
              SECTION 5.03.  Payment of ISDA Amount upon Acceleration of
X-TRAS.  If an Event of Default resulting in acceleration of the X-TRAS occurs,
the Issuer shall pay to the Indenture Trustee, in addition to such amounts as
may be due in respect of the principal of, Applicable Premium, if any, and
accrued interest on the X-TRAS pursuant to Article V of the Original Indenture
and this Sixth Supplemental Indenture, an amount equal to the ISDA Amount
as of the date of acceleration of the X-TRAS (as calculated by the Calculation
Agent as of such date and notified to the Issuer, the Indenture Trustee and the
Pass Through Trustee within [five] Business Days thereafter).
    

                                   ARTICLE VI

                                   DEFEASANCE

              SECTION 6.01.  General.  All of the provisions of Article Ten of
the Original Indenture shall be applicable to the X-TRAS.

              SECTION 6.02.  Satisfaction and Discharge.   The provisions of
Section 10.1(A) of the Original Indenture are amended to provide that, in 
addition to the requirements set forth therein for obtaining the satisfaction 
and discharge of the Issuer's obligations under the Indenture 

   56

                                     56

in respect  of the X-TRAS, the Issuer shall, on the date of deposit
referred to in Section 10.1(A)(c)(ii) of the Original Indenture, be required to
deliver to the Indenture Trustee for the benefit of the Pass Through Trustee
the ISDA Amount, if any, as determined by the Extension Option Buyer as of 
such date and notified to the Issuer, the Indenture Trustee and the Pass 
Through Trustee by 10 a.m., New York City time, on such date.

              SECTION 6.03.   Legal Defeasance.  (a)  Solely for purposes of a
legal defeasance of the X-TRAS, the requirements for a legal defeasance set 
forth in Section 10.1(B) of the Original Indenture are amended to provide that
in addition to the requirements set forth in clauses (a) through (f), the Issuer
shall be required to deliver to the Indenture Trustee on the date of deposit
referred to in Section 10.1(B)(a) of the Original Indenture cash in an amount
equal to the ISDA Amount, if any, as determined by the Extension Option Buyer
as of such date and notified to the Issuer, the Indenture Trustee and the Pass
Through Trustee by 10 a.m., New York City time, on such date.

              (b)    Upon satisfaction by the Issuer of the requirements of
Section 10.1(B) of the Original Indenture and the foregoing clause (a), in
connection with any legal defeasance of the X-TRAS, the Issuer shall be
released from its obligations under the Original Indenture and under this Sixth
Supplemental Indenture with respect to the X-TRAS, except to the extent
otherwise provided in Section 10.1(b) of the Original Indenture.

              SECTION 6.04.   Covenant Defeasance.  (a)  Solely for purposes of
a covenant defeasance of the X-TRAS, the requirements for a covenant defeasance
set forth in Section 10.1(C) of the Original Indenture are amended to provide
that in addition to the requirements 

   57
                                     57

set forth in clauses (a) through (f), the Issuer shall be required to
deliver to the Indenture Trustee for the benefit of the Pass Through Trustee on
the date of deposit referred to in Section 10.1(C)(a) of the Original Indenture
cash in an amount equal to the ISDA Amount, if any, as determined by the 
Extension Option Buyer as of such date and notified to the Issuer, the 
Indenture Trustee and the Pass Through Trustee by 10 a.m. on such date.

              (b)    Upon satisfaction by the Issuer of the requirements of
Section 10.1(C) of the Original Indenture, in connection with any covenant
defeasance of the X-TRAS, the Issuer shall be released from its obligations
under Article Nine of the Original Indenture and under Articles III and IV of
this Sixth Supplemental Indenture with respect to the X-TRAS.

                                 ARTICLE VII

                                 REDEMPTION

              SECTION 7.01.   Redemption at the Option of the Issuer.  (a)  The
provisions of Article XI of the Original Indenture (other than Sections 11.5
and 11.6) shall be applicable to the X-TRAS.

   
        (b)    The X-TRAS will be redeemable at any time, at the option of the
Issuer, in whole or in part, on any date on or prior to the Premium Termination
Date on not less than 30 nor more than 60 days' prior notice to the Indenture
Trustee, the Pass Through Trustee and the Extension Option Buyer, at a
redemption price, ("Early Redemption Price") equal to the sum of (i) 100% of
the principal amount of the X-TRAS being redeemed, 
    


   58
                                     58
   
together with accrued interest, if any, thereon to the Redemption Date
plus the Applicable Premium (but interest installments whose Stated Maturity is
on or prior to the Redemption Date will be payable to the Holder thereof of
record at the close of business on the relevant Record Date referred to on the
face hereof all as provided in the Indenture) plus (ii) the ISDA Amount, if
any, as determined by the Extension Option Buyer and  notified to the Issuer,
the Indenture Trustee and the Pass Through Trustee  [five] Business Days prior
to the Redemption Date.  In no event will the Redemption Price ever be less 
than 100% of the principal amount of the X-TRAS plus accrued interest to the 
Redemption Date.   The Notional Amount used to determine the ISDA Amount shall 
be equal to the aggregate principal amount of X-TRAS redeemed.
    
        
              (c)    If the X-TRAS are extended until the Extended Stated
Maturity, the Issuer shall have the option (the "FD Redemption Option"), in
lieu of permitting the X-TRAS to be remarketed in accordance with Article VIII
of this Sixth Supplemental Indenture, to redeem the X-TRAS in whole on the
Initial Stated Maturity, by irrevocable notice given to the Indenture Trustee,
the Pass Through Trustee, the Extension Option Buyer and the Calculation Agent
not later than the Remarketing Deadline, at a redemption price, payable in
cash, equal to the sum of (i) 100% of the principal amount of the X-TRAS being
redeemed together with accrued interest, if any, thereon to the Initial Stated
Maturity plus (ii) the ISDA 

   59
                                     59


Amount, if any, as of the Exercise Date (as calculated by the
Calculation Agent and notified to the Issuer, the Indenture Trustee and the
Pass Through Trustee within five Business Days thereafter), which redemption
price shall be payable at the Initial Stated Maturity.  The Notional Amount
used to determine the ISDA Amount shall be the aggregate principal amount of
the X-TRAS outstanding as of the Exercise Date.

   
              SECTION  7.02.   Put Option of Holders.  If the maturity of the
X-TRAS is extended and for any reason the Pass Through Trustee does not receive 
an amount in cash equal to the principal amount of and interest on the 
X-TRAS plus the ISDA Amount by the Remarketing on the Initial Stated Maturity,
all of the outstanding X-TRAS at a purchase price equal to 100% of the 
principal amount of and accrued interest on the X-TRAS to the Initial Stated 
Maturity.
    

                                  ARTICLE VIII

   60


                                     60

                            REMARKETING OF X-TRAS

   

              SECTION 8.01.   Remarketing of X-TRAS.  In the event that the 
maturity of the X-TRAS is extended until the Extended Stated Maturity, then, 
unless the Issuer exercises the FD Redemption Option (which option the Issuer 
shall be entitled to exercise at any time subsequent to the delivery of the
Extension Notice and prior to the earlier of the pricing of the remarketing and
the Remarketing  Deadline upon delivery of an irrevocable notice of redemption),
the interest rate borne by the X-TRAS will be reset on the pricing of the
remarketing effective on and as of the date of closing of the remarketing in
order that the X-TRAS may be remarketed so as to yield net proceeds  in cash at 
least equal to the sum of (i) 100% of the principal amount of the X-TRAS plus 
(ii) the ISDA Amount as of the Exercise Date as calculated by the Calculation
Agent and notified to the Issuer, the Indenture Trustee and the Pass Through
Trustee within five Business Days thereafter (collectively, the "Required
Remarketing Proceeds"). As more particularly set forth in the next sentence,
it is intended that the portions of the Required Remarketing Proceeds
representing the principal amount of the X-TRAS, together with the amount
payable by the Issuer pursuant to such sentence, will be sufficient to enable
the Pass Through Trustee to make the Final Distribution on the Certificates. 
Accordingly, the Issuer shall be obligated to pay to the Pass Through Trust,
simultaneously with the closing of the remarketing, an amount equal to the
interest 
    

   61

                                     61

   
that would have accrued on the X-TRAS had they been held by the Pass
Through Trust to the Final Distribution Date.  Upon payment of the Final
Distribution to Certificateholders and the ISDA Amount to the Extension Option
Buyer on the Final Distribution Date, the Issuer shall be entitled to receive 
any amounts earned in respect of the investment by the Pass Through Trustee of
the Required Remarketing Proceeds and the ISDA Amount in U.S. Government
Obligations pursuant to clause (d) below. In no event shall the Issuer shall
have any obligation to pay the principal  amount of the X-TRAS to the Pass
Through Trust on the Initial Stated Maturity. 
    

        
              SECTION 8.02.  Remarketing Procedure.   The X-TRAS will be
remarketed in accordance with the following procedure (the "Remarketing
Procedure"):

              (a)    On the Exercise Date and thereafter on the 75th, 60th,
45th, 30th and 15th day prior to the Initial Stated Maturity, Morgan Stanley &
Co. Incorporated (or, subsequent to the Exercise Date, such other investment
banking institution as may be selected as the Remarketing Agent) will provide
the Issuer with non-binding indications of the interest 

   62
                                     62

rate and discount or premium at which it believes it could remarket the X-TRAS 
in order to yield the Required Remarketing Proceeds.

              (b)    Morgan Stanley & Co. Incorporated shall act as the
Remarketing Agent for the X-TRAS unless, no later than [60] days prior to the
Initial Stated Maturity, the Issuer shall select another investment banking
institution to remarket the X-TRAS or exercise the FD Redemption Option in
accordance with the provisions of Section 7.01(c) hereof.

              (c)    No later than 15 days prior to the Remarketing Deadline,
the Remarketing Agent will commence marketing of the X-TRAS to investors.

   
              (d)    Pricing and closing of the remarketed X-TRAS shall occur
at any time within 10 days prior to the Remarketing Deadline, subject to then
prevailing market conditions and settlement cycles.  Upon completion of the
remarketing, the net proceeds thereof, together with the amount payable by the
Issuer equal to the interest that would have accrued on the X-TRAS had they
been held by the Pass Through Trust to the Initial Stated Maturity, will be
deposited with the Pass Through Trustee and invested in Government Obligations 
having a maturity as close as possible equal to the number of days between the 
date of such investment and the Initial Stated Maturity.  
    

              (e)    The Remarketing Agent will be entitled to underwriting
commissions, payable at settlement of the Remarketing Procedure, which
will be determined at the time the Remarketing Procedure is commenced and shall
be consistent with then prevailing market practices.   In the event that Morgan
Stanley & Co. Incorporated purchases the X-TRAS pursuant to clause (i) below,
it shall be entitled to underwriting commissions, payable at 

   63

                                     63

settlement of such purchase, which will be determined at the time it
gives notice of its offer pursuant to clause (i) below and shall be consistent
with then prevailing market practices.

              (f)    The Issuer will cooperate with and provide information
reasonably requested by the Remarketing Agent and (in the event of an offer to
purchase by Morgan Stanley & Co. Incorporated made pursuant to clause (i)
below) by Morgan Stanley & Co. Incorporated in connection with the remarketing
or purchase of the X-TRAS, as applicable, including, without limitation, (1)
promptly preparing an offering memorandum or prospectus containing such
disclosures as may be required by applicable law and as may be required by
the Remarketing Agent or Morgan Stanley & Co. Incorporated, as applicable, in
its reasonable judgment, (ii) executing and delivering or causing to be
executed and delivered legal documentation (including a purchase agreement or
underwriting agreement and registration rights agreement with customary
indemnities, covenants, representations and warranties, comfort letters and
legal opinions) in form and substance reasonably satisfactory to the
Remarketing Agent or Morgan Stanley & Co. Incorporated, as applicable, (iii)
providing promptly upon request updated consolidated financial statements to
the date of its latest report filed with the Commission and (iv) to the extent
the Issuer and the Remarketing Agent or Morgan Stanley & Co. Incorporated, as
applicable, deem reasonably necessary for successful completion of the
Remarketing Procedure or the purchase by Morgan Stanley & Co. Incorporated, as
applicable, making available senior management of the Issuer for road show and
one-on-one presentations.

   64

                                     64

              (g)    The Issuer may, in its sole discretion, elect to cause the
X-TRAS to be remarketed by conducting an underwritten offering or private
placement thereof on a firm-commitment basis.  In such event, the Issuer shall
notify the Remarketing Agent of such request no later than [70] days prior to
the Final Distribution Date.  The Issuer acknowledges that in no event shall
the Remarketing Agent be deemed by this provision to have made a commitment to
underwrite or place the X-TRAS.

              (h)    Regardless of whether it has been selected to act as
Remarketing Agent, Morgan Stanley & Co. Incorporated shall at all times be
permitted to make an offer, on not less than [five] Business Days' notice, to
purchase the X-TRAS bearing a reset interest rate specified by Morgan 
Stanley & Co. Incorporated on a date not later than the Remarketing Deadline
for net proceeds in cash equal to the Required Remarketing Proceeds, which 
offer the Company and the Trustee shall be required to accept, unless, on or 
prior to the date for such purchase specified in the notice provided by Morgan 
Stanley & Co. Incorporated, (i) the Company shall have delivered an 
irrevocable notice of redemption pursuant to Section 7.01(c) of this Sixth 
Supplemental Indenture or (B) any other party shall have remarketed the X-TRAS 
bearing a reset interest rate lower than or equal to that specified by Morgan 
Stanley & Co. Incorporated for net proceeds in cash at least equal to the 
Required Remarketing Proceeds.

   
              (i)     The remarketed X-TRAS will bear interest at the reset
interest rate commencing upon the date of closing of the remarketing.  For the
avoidance of 
    

   65
                                     65

doubt, holders of the remarketed X-TRAS shall not be entitled to
receive any interest thereon for any period prior to the date of closing of the
remarketing.

                                 ARTICLE IX

                           SUPPLEMENTAL INDENTURES

              SECTION 9.01.   Effect on Original Indenture.  This Sixth
Supplemental Indenture is a supplement to the Original Indenture.  As
supplemented by this Sixth Supplemental Indenture, the Original Indenture is in
all respects ratified, approved and confirmed, and the Original Indenture and
this Sixth Supplemental Indenture shall together constitute one and the same
instrument.

   
              SECTION 9.02.   Supplemental Indentures without Consent of
Securityholders.   The Issuer and the Indenture Trustee may enter into
supplemental indentures to this Sixth Supplemental Indenture without the
consent of the Holders of the X-TRAS for any of the purposes for which 
execution of a supplemental indenture without the consent of the Holders of 
the X-TRAS is authorized as provided in Section 8.1 of the Original Indenture.
In addition, any such supplemental indentures may be entered into without the 
consent of the Holders of the X-TRAS for the purpose of (i) curing any 
ambiguity or correcting or supplementing any provision which may be defective 
or inconsistent with any other provision in the Original Indenture, the ISDA 
Master Agreement or the Pass Through Trust Agreement or (ii) modifying or 
amending any of the provisions hereof or of the X-TRAS (A) relating to the 
ISDA Master Agreement or (B) that is effective only from and after the closing
of the remarketing of the XTRAS; provided that no such action adversely 
affects the interests of
    

   66
                                     66

the Holders of Securities of any Series; and provided further that  no
such supplemental indenture referred to in the first clause of this sentence
and in clauses (a) through (f) of Section 8.1 of the Original Indenture which
has a material adverse effect on the Extension Option Buyer may be entered into
without the consent of the Extension Option Buyer.
        
              SECTION 9.03.   Supplemental Indentures with Consent of
Securityholders.  The provisions of Section 8.2 of the Original Indenture are
hereby amended to provide that notwithstanding any consent obtained from the
Holders of X-TRAS in respect of any modification, amendment or supplement to
this Sixth Supplemental Indenture requiring the consent of the Holders of the
X-TRAS pursuant to Section 8.2 of the Original Indenture, no modification,
amendment or supplement may be made to this Sixth Supplemental Indenture that
has a material adverse effect on the Extension Option Buyer without the 
consent of the Extension Option Buyer.


                                  ARTICLE X

                          MISCELLANEOUS PROVISIONS

              SECTION 10.01.   Provisions of Indenture for the Sole Benefit of
Parties and Holders of Securities and Coupons.  The provisions of Section 14.2
of the Original Indenture are hereby amended to provide that, solely for
purposes of the X-TRAS issued under the Sixth Supplemental Indenture, (i) each
of the Extension Option Buyer and Morgan Stanley & Co. Incorporated (as
Remarketing Agent) shall be a third party beneficiary of this Agreement and may
enforce the obligations of the Issuer hereunder running in favor of the
Extension 

   67
                                     67

Option Buyer and Morgan Stanley & Co. Incorporated, as applicable,
and (ii) all amounts payable by the Issuer under this Sixth Supplemental 
Indenture shall be for the benefit of and enforceable by the Pass Through 
Trustee and shall be paid over by the Indenture Trustee to the Pass Through 
Trustee promptly upon confirmation of the receipt of funds from the Company by 
the Indenture Trustee.

   
              SECTION 10.02.   Michigan Law to Govern.  This Sixth Supplemental
Indenture and the X-TRAS shall be governed by and deemed to be a contract
under, and construed in accordance with, the laws of the State of Michigan, and
for all purposes shall be construed in accordance with the laws of such State,
except as may otherwise be required by mandatory provisions of law.
    


                                 TESTIMONIUM

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





   68

                                     68


              IN WITNESS WHEREOF, the parties hereto have caused this Sixth
Supplemental Indenture to be duly executed and their respective corporate seals
to be hereunto affixed and attested, all as of the day and year first written
above.

                                                 CMS ENERGY CORPORATION



                                                 By:



Attest:


(Corporate Seal)



                                                 NBD BANK
                                                 as Indenture Trustee



                                                 By:

Attest:


(Corporate Seal)





   69

                              Schedule 4.03(b)(2)


       Indebtedness of CMS Energy Corporation outstanding on May 6, 1997