Michigan Gas Storage Company

First Revised Volume No 1

Effective Date: 01/01/1997, Docket: RP96-290-000, Status: Effective

First Revised Sheet No. 21 First Revised Sheet No. 21 : Superseded

Superseding: Original Sheet No. 21

RATE SCHEDULE NNS

NO NOTICE SERVICE

(continued)

MGS may perform service for such Shipper under this Rate Schedule

if said Shipper, upon notice of noncredit worthiness from MGS, (i)

deposits and maintains a prepayment of an amount equal to three

(3) Months of the cost of MGS's billings under its Service

Agreement for performing such service at the full MDQ or (ii)

Shipper furnishes within fifteen (15) Days good and sufficient

security, as determined reasonably by MGS, of a continuing nature

and in an amount equal to the cost of MGS's billings under its

Service Agreement for performing said service at the full MDQ for

a period of three (3) Months. MGS may, without waiving any rights

or remedies it may have, suspend further service until such

security is received after any necessary authorizations by any

regulatory bodies having jurisdiction.

3.3 General Terms and Conditions

The General Terms and Conditions of this Tariff are applicable to

this Rate Schedule.

4. RATES AND CHARGES

Subject to such modifications as may be imposed and/or authorized

by the FERC, each month Shipper shall, where applicable, pay MGS

the following amounts:

4.1 Monthly Charges

a. Capacity Charge

A Capacity Rate per dth as shown on effective Tariff

Sheet No. 4, multiplied by 1/12th of Shipper's MSQ.

b. Deliverability Charge

A Deliverability Rate per dth as shown on effective

Tariff Sheet No. 4, multiplied by Shipper's MDWQ.

c. Injection Charge

An Injection Rate per dth as shown on effective Tariff

Sheet No. 4, multiplied by the quantity of Gas

injected into Storage by MGS on behalf of Shipper.

d. Withdrawal Charge

A Withdrawal Rate per dth as shown on effective Tariff

Sheet No. 4, multiplied by the quantity of Gas

withdrawn from Storage by MGS on behalf of Shipper.