Natural Gas Pipeline Company Of America

Seventh Revised Volume No. 1

Effective Date: 04/18/2008, Docket: RP08-319-000, Status: Effective

Original Sheet No. 144 Original Sheet No. 144 : Pending

RATE SCHEDULE IBS

INTERRUPTIBLE BALANCING SERVICE

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7. UPSTREAM AND DOWNSTREAM ARRANGEMENTS, END-OF-TERM IMBALANCE AND

AGGREGATION

(a) Shipper shall make all necessary arrangements with other

parties at or downstream of the Delivery Points under the IBS

Agreement. Such arrangements must be consistent with this Rate

Schedule IBS and the linked FTS, FTS-G or ITS Agreement and must be

coordinated with Natural.

(b) Shipper must have a zero IBS Balance at the end of the

term of the IBS Agreement. If an IBS Balance remains at the end of

the term, the remaining volumes shall be cashed out as set out at

Section 13.3 of the General Terms and Conditions of this Tariff.

Shipper and Natural may also mutually agree to cashout an IBS Balance

at the end of any month under an IBS Agreement consistent with said

Section 13.3.

basis, an IBS Agreement may cover only a single end-use facility and

a single related Delivery Point.

(1) Natural will agree to limited aggregation of end-

use facilities and Delivery Points under a single IBS Agreement

pursuant to this subsection (c) if the following criteria are met:

(i) all the end-use facilities must have the same

owner or operator (or a common agent consistent with this provision);

(ii) all the end-use facilities must be of the

same type;

(iii) it must be operationally feasible for Natural

to provide service on an aggregated basis to all such end-use

facilities and points consistent with this Rate Schedule IBS; and

(iv) the number of end-use facilities to be

aggregated may not exceed five (5) and the number of related points

to be aggregated may also not exceed five (5).