West Texas Gas, Inc.

First Revised Volume No. 1

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Effective Date: 05/01/1998, Docket: RP98- 25-005, Status: Effective

First Revised Sheet No. 14 First Revised Sheet No. 14 : Effective

Superseding: Original Sheet No. 14

GENERAL TERMS AND CONDITIONS

(Continued)

4. Measurement Equipment (Continued):

4.6 Failure of Meter (Continued):

(a) By correcting the error if the percentage of error is

ascertainable by calibration, tests or mathematical

calculation; or

(b) In the absence of (a), by using the registration of any

check meter or meters if installed and accurately registering;

or

(c) In the absence of both (a) and (b), by estimating the

quantity of delivery by deliveries during periods under

similar conditions when the meter was registering accurately.

5. Billing:

5.1 Determination of Volumes: There shall be subtracted from

the total amount of natural gas delivered by Seller to Buyer

during the billing period the volumes of gas sold by Seller to

Buyer under Rate Schedule IS-1. The remaining balance delivered

by Seller to Buyer during the billing period shall be billed

under the Rate Schedule FS-1.

5.2 Billing: On or before the tenth day of each month,

Seller shall render to Buyer a statement of the quantities of

natural gas delivered to Buyer during the preceding month and

the amount due from Buyer to Seller. When information

necessary for billing purposes is in control of Buyer, Buyer

shall furnish such information to Seller on or before the

fifth day of each month.

5.3 Examination of Records: Both Seller and Buyer shall have

the right to examine, at reasonable times, 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.