Western Gas Interstate Company

Fourth Revised Volume No. 1

Effective Date: 06/01/1997, Docket: RP97-160-001, Status: Effective

Original Sheet No. 212A Original Sheet No. 212A : Effective

GENERAL TERMS AND CONDITIONS

(continued)

8. BILLING:

8.1 Billing - On or before the ninth (9th) business day

after the end of the production month, Western shall

mail, first class postage prepaid, to Buyer or

Shipper an invoice for all natural gas delivered and

gas service furnished to Buyer or Shipper during the

Billing Month or any other such billing period agreed

to by the parties. When information necessary for

billing purposes is in control of Buyer or Shipper or

others acting on behalf of Buyer or Shipper, Buyer

or Shipper shall furnish such information to

Western on or before the fifth day of the month

following service. The standardized billing unit on

all invoices will be dekatherms (Dth).

8.2 The imbalance statement will be rendered prior to

or with the invoice, and the transportation invoice

will be prepared on or before the 9th business day

after the end of the production month. Rendered is

defined as postmarked, time-stamped, and delivered to

the designated site.

8.3 Examination of Records - Both Western and Buyer or

Shipper or their authorized representatives shall

have the right to examine, at reasonable times, in

Western's general office, books, records and

charts of the other to the extent necessary to

verify the accuracy of any statement, charge or

computation made under or pursuant to any of the

provisions hereof. Western, Buyer and Shipper

shall preserve all such books, records, and charts

or copies thereof for a period of at least three

(3) years.