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. 137 Original Sheet No. 137 : Pending

RATE SCHEDULE IBS

INTERRUPTIBLE BALANCING SERVICE

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5.4 (a) Natural shall have the unilateral right to file

with any appropriate regulatory authority and make changes effective

in: (1) the rates and charges applicable under this Rate Schedule

IBS, including both the level and design of such rates and charges;

or (2) the terms and conditions of this Rate Schedule IBS. Natural

agrees that Shipper may protest or contest the aforementioned

filings, or may seek authorization from duly constituted regulatory

authorities for such adjustment of Natural's existing FERC Gas

Tariff as may be found necessary to assure that its provisions are

just and reasonable.

(b) If, at any time and from time to time, the

Commission or any other governmental authority having jurisdiction

in the premises allows or permits Natural to collect, or to

negotiate to collect, a higher rate for the service hereunder, the

rate shall, subject to any contrary provision of the IBS Agreement

or a separate discount agreement, be increased to the highest such

rate. Should additional documentation be required in order for

Natural to collect such highest rate, Shipper shall execute or

provide such documentation within fifteen (15) days after a written

request by Natural. If, at any time and from time to time, the

Commission or any other governmental authority having jurisdiction

in the premises requires Natural to charge a lower rate for

balancing service hereunder, the rate shall be decreased to such

reduced rate.

5.5 Natural may from time to time and at any time, upon twenty-

four (24) hours verbal or written notice, subject to any provisions on

discounting in the IBS Agreement or in a separate discount agreement,

charge any individual Shipper for service under this Rate Schedule IBS

a rate which is lower than the applicable maximum rate set forth in

this Tariff; provided, however, that such rate charged may not be less

than the applicable minimum rate for service under Rate Schedule IBS

set forth in this Tariff. Natural will confirm any verbal notice of

the applicable rate in writing. Such notification shall specifically