Questar Southern Trails Pipeline Company

Original Volume No. 1

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Effective Date: 06/01/2002, Docket: RP02-318-000, Status: Effective

Original Sheet No. 94 Original Sheet No. 94 : Effective

GENERAL TERMS AND CONDITIONS

not be deemed a waiver of the right to contest such disputed

portion in any forum having jurisdiction.

16.9 Prior-Period Adjustments. Prior-period adjustment

time limits shall be six months from the date of the initial

transportation invoice and seven months from date of initial

sales invoice with a 3-month rebuttal period, excluding

government-required rate changes. This standard shall not

apply in cases of deliberate omission, misrepresentation or

mutual mistake of fact. Parties' other statutory or

contractual rights shall not otherwise be diminished by this

standard.

16.10 Billing For Released Capacity.

(a) A releasing Shipper will be billed the

reservation charges associated with the entire amount of the

releasing Shipper's RDC. A conditional credit for the payment

of either volumetric or reservation-charge capacity releases

will be applied to the releasing Shipper's bill if, when

required, the releasing Shipper has provided the billing

information set out in 16.3 The releasing Shipper will also

be billed any negotiated marketing fee.

(b) Southern Trails will bill the replacement

Shipper based on the rates specified in the transportation

service agreement and any other applicable charges. The

replacement Shipper must pay the billed amount directly to

Southern Trails.

(c) If a replacement Shipper fails to pay Southern

Trails, Southern Trails will notify the releasing Shipper that

the conditional credit has been reversed and of the amount

due, including interest calculated in accordance with 18

C.F.R. 154.501(d). This amount must be paid by the

releasing Shipper. If the replacement Shipper subsequently

pays Southern Trails, Southern Trails will credit the amount

received to the releasing Shipper.

16.11 Crediting of Interruptible and Overrun Revenues.

(a) Southern Trails will credit Rate Schedule FT

Shippers with 90 percent of all Rate Schedule IT

transportation and Overrun service revenues during each

twelve-month period beginning June 1 of each year and ending

May 31 of each subsequent year. All credits to Rate Schedule

FT Shippers shall be net of variable costs.