Natural Gas Pipeline Company Of America

Seventh Revised Volume No. 1

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

Original Sheet No. 143 Original Sheet No. 143 : Pending

RATE SCHEDULE IBS

INTERRUPTIBLE BALANCING SERVICE

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(d) If Shipper fails to make a timely and valid IBS Payback

nomination to reduce its IBS Balance for a day to zero, then the Balancing

Service Charges in Section 12 of the General Terms and Conditions of the

Tariff shall apply, with no tolerance or exemption, based on the IBS

Balance information provided to Shipper by Natural. Such charges will

continue as applied to the remaining volume of the IBS Balance for that

day until valid IBS Payback nominations adequate to eliminate the IBS

Balance have been submitted under this Section 6. Such Balancing Service

Charges shall also apply, with no tolerance or exemption, to the extent

Shipper makes a timely and valid IBS Payback nomination which is confirmed

by Natural, but IBS Payback is not actually effectuated by Shipper. The

phrase "with no tolerance or exemption" as used herein shall mean the

following: under Section 12.2(a)(2) of the General Terms and Conditions of

this Tariff, the 0% to 5% tier does not apply and the lowest charge

($0.10/Dth) applies to variances between 0% and 10%; under Section 12.3(a)

of the General Terms and Conditions of this Tariff, the 0% to 3% tier does

not apply and the lowest charge (greater of $1.00 or 50% of AMIP) applies

to variances between 0% and 10%; and the exemptions in Sections 12.6 and

23.6(g) of the General Terms and Conditions of this Tariff do not apply.

Each day for which an IBS Balance accrues is accounted for separately for

purposes of applying Balancing Service Charges and the other provision of

this Section 6. IBS Payback nominations shall apply first to the oldest

day's IBS Balance. No Balancing Service Charges shall apply for any day,

however, if Shipper makes a valid, timely and adequate IBS Payback

nomination for that day within the limit specified in subsection (c)

above, but that IBS Payback nomination is not confirmed by Natural for

reasons other than that the nomination was not proper. Intraday IBS

Payback nominations will not avoid Balancing Service Charges as to volumes

not timely nominated unless confirmed by Natural and unless adequate under

(c) above.

(e) A Shipper which is submitting an IBS Payback nomination on

any day may also on that day submit an Access Request for additional

service under this Rate Schedule IBS. Subject to subsection (f) below,

such Access Requests will be processed under and are subject to the same

requirements and limitations as are imposed on all Access Requests by

Sections 6(a) and 6(b) of this Rate Schedule IBS.

(f) The cumulative IBS Balance under an IBS Agreement may not

exceed two (2) times Shipper's MDQ, absent agreement by Natural.

(g) Cashout provisions of the Tariff shall only apply to IBS

Balances to the extent provided in Section 7(b) of this Rate Schedule. All

IBS Balances must be zeroed out through the Access Request and IBS Payback

nomination process in this Section 6 except as otherwise provided in

Section 7(b) of this Rate Schedule.