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. 138 Original Sheet No. 138 : Pending

RATE SCHEDULE IBS

INTERRUPTIBLE BALANCING SERVICE

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state the effective date of such rate change and the quantity of gas

so affected. Unless otherwise agreed in the IBS Agreement or in a

separate discount agreement, Natural may at any time further change

such rate (subject to any restrictions as to maximum or minimum

rates set out in this Tariff, the IBS Agreement and/or any discount

agreement) upon twenty-four (24) hours' verbal notice to Shipper,

which notice shall be confirmed in writing. Such notification shall

specifically state the effective date of such rate change and the

quantity of gas so affected. Natural shall file with the Commission

any and all reports as required by the Commission's Regulations with

respect to the institution or discontinuance of any discount.

5.6 All revenues and gas in kind collected by Natural as a

result of providing service under this Rate Schedule IBS shall be

retained by Natural unless Natural has otherwise explicitly agreed

on a different disposition of such amounts. Where crediting or

refund mechanisms apply under other provision(s) of this Tariff or

pursuant to effective Commission orders or settlements, such

mechanisms shall supersede this Section to the extent necessary to

carry out such provision(s).

6. ACCESS REQUESTS, PAYBACK NOMINATIONS, BALANCING SERVICE CHARGES,

OVERRUN CHARGES, AND CASHOUT.

(a) Subject to the remainder of this Section 6, on any

day, Shipper may submit an Access Request for service under its IBS

Agreement up to its MDQ; provided, however, that unless Natural

otherwise agrees, the net effect (taking into account the direction

of the request) of such Access Request for any day may only result in

service hereunder equal in volume to the difference between Shipper's

then effective MDQ under the IBS Agreement (reduced by releases of

the linked transportation Agreement as set out below) and Shipper's

nominations to serve the specified end-use facility or facilities

that day under the linked transportation Agreement (maximum daily

access volume). If Shipper has released any part of a linked firm

transportation Agreement, such release(s) shall be taken into account

in determining the level of service available under the IBS Agreement

if the release(s) reduce the effective MDQ available to Shipper for

nomination under the linked transportation Agreement to the

designated Delivery Point(s) below the MDQ under the IBS Agreement.

Except for authorized overrun, an Access Request for a swing up may

not exceed the unnominated portion of the MDQ under the linked

transportation Agreement (reduced as applicable by any releases).