Northwest Pipeline Corporation

First Revised Volume No. 1-A

Effective Date: 11/25/1990, Docket: GT91- 5-000, Status: Effective

Original Sheet No. 439 Original Sheet No. 439 : Effective

GENERAL TERMS AND CONDITIONS

(Continued)

19. SUPPLIER SETTLEMENT PAYMENT RECOVERY MECHANISM (Continued)

19.5 Filing Procedure. (Continued)

(b) At least thirty (30) days prior to the effective date of any

change in rates that results in an adjustment to the effective

billing determinants, Transporter shall file a revised Sheet

No. 201 to adjust the Commodity SSP Charge, to reflect

revisions to the commodity volume billing determinants.

In no event shall Transporter adjust the SSP Commodity

Charge to carry forward the effect of over or under-collections

of the principal amount of the Commodity SSP Account that was

collectable by Transporter in a prior quarter or prior Annual

Recovery Period.

19.6 Prudence Challenges. In the event any Shipper challenges the

prudence of any SSP costs, or is bound by a state or local rate

setting agency or consumer advocate group that challenges the

prudence of any SSP costs, and the prudence of the cost is upheld,

Transporter shall be permitted to recover from Shipper such

Shipper's proportionate share of all SSP costs including costs

which Transporter would otherwise be required to absorb.