Westgas Interstate, Inc.

First Revised Volume No. 1

Effective Date: 11/02/1998, Docket: RP99- 87-000, Status: Effective

First Revised Sheet No. 46A First Revised Sheet No. 46A : Effective

Superseding: Substitute Original Sheet No. 46A

GENERAL TERMS AND CONDITIONS

(Continued)

7.3 Determination of Deliveries. At each Point of

Receipt or Delivery, quantities shall be based upon an

allocation procedure. Quantities shall mean quantities

nominated by Shipper and scheduled and confirmed by

Transporter.

(a) At each Point of Receipt and Point of Delivery,

Transporter shall reach agreement with the Shipper as

to the Predetermined Allocation Agreement (PDA) to be

used for the next Gas Day. However, if an

Operational Balancing Agreement has been agreed to

and is effective at a Point of Receipt or Delivery,

no additional PDA is required.

(i) PDA's shall be established using the

allocation methodologies and criteria set forth

in GISB Standards.

(ii) PDA's for each Gas Day shall be agreed to

prior to gas flow. To the extent possible,

changes to PDA's during a calendar Month shall

be minimized or avoided.

(iii) In the event that less than Confirmed

Nominations are to be allocated, Transporter

shall use the ranks provided in the affected

Nominations to determine Shipper Priorities to

the extent that use of such rank is not in

conflict with other provisions of this Tariff.

(iv) The upstream or downstream party providing

the point confirmation shall submit the PDA

allocation to the allocating party after or

during confirmation and before the start of the

Gas Day.

(v) The allocating party should send back

"confirmation" of receipt of the pre-determined

allocation within 15 minutes.

(b) There are two types of allocations: daily and

monthly.