Horizon Pipeline Company, L.L.C.

Original Volume No. 1

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Effective Date: 04/18/2002, Docket: CP00-129-001, Status: Effective

Original Sheet No. 148 Original Sheet No. 148 : Effective

GENERAL TERMS AND CONDITIONS

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(b) Notice of a Critical Time will be posted on the

DART system, and will be the first information item shown on the

bulletin board feature of DART. Horizon will endeavor to post the

notice on DART before 4:00 p.m. Central Time or otherwise will

endeavor to notify Shippers via DART by 4:00 p.m. Central Time

that they should check DART again at a specified later time to see

whether a Critical Time will be in effect for the next day.

Horizon must attempt to give actual notice of a Critical Time via

telefax or telephone (provided a Shipper has given the numbers to

Horizon as required in Section 34) at least four (4) hours prior

to the start of the day before a Critical Time will be effective

as to a Shipper. Such notice shall specify the anticipated

duration of the Critical Time and whether the Critical Time

Balancing Service Charges will apply to over-receipts and under-

deliveries vis-a-vis confirmed nominations or to under-receipts

and over-deliveries vis-a-vis confirmed nominations. A Critical

Time will be effective at the start of a day and will continue

until the end of the day and through the end of successive days

until Horizon notifies Shippers via DART that there is no longer a

Critical Time.