Viking Gas Transmission Company

First Revised Volume No. 1

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Effective Date: 12/24/2004, Docket: RP05- 89-000, Status: Effective

Ninth Revised Sheet No. 55 Ninth Revised Sheet No. 55 : Effective

Superseding: Eighth Revised Sheet No. 55

GENERAL TERMS AND CONDITIONS

4. MEASURING EQUIPMENT (Continued)

4.6 Correction of Metering Errors - Failure of Meters

In the event a meter is out of service or registering inaccurately, the

quantity of gas delivered shall be determined:

(a) by using the registration of any check meter or meters, if installed and

accurately registering; or, in the absence of (a);

(b) by correcting the error if the percentage of error is ascertainable by

calibration, tests, or mathematical calculation; or, in the absence of

both (a) and (b);

(c) by estimating the quantity of delivery by deliveries during periods under

similar conditions when the meter was registering accurately.

4.7 Measurement of Allocations

Pursuant to NAESB WGQ Standards 2.3.7 (Version 1.5), 2.3.11 (Version 1.5),

2.3.12 (Version 1.5), 2.3.13 (Version 1.5), 2.3.14 (Version 1.5):

The cutoff for the closing of measurement is 5 Business Days after business

month. For treatment of measurement prior period adjustments, treat the

adjustment by taking it back to the production month. A meter adjustment

becomes a prior period adjustment after the fifth Business Day following the

business month. For reporting measurement prior period adjustments, report it

with the restated line item with new total quantity for the Gas Day and the

month. Estimate missing or late measurement data and treat actual as a prior

period adjustment, with the measuring party to provide the estimate.

Measurement data corrections should be processed within 6 months of the

production month with a 3 month rebuttal period. This standard shall not apply

in the case of deliberate omission or misrepresentation or mutual mistake of

fact. Parties' other statutory or contractual rights shall not otherwise be

diminished by this standard.

4.8 Preservation of Metering Records

Company and Shipper shall each preserve for a period of at least one year all

test data, charts, and other similar records.

5. INVOICING

5.1 Monthly Invoicing Date

Company shall render to Customer invoices for each month gas service was

furnished under any of Company's rate schedules during the preceding

invoicing period. Pursuant to NAESB WGQ Standards 3.3.4 (Version 1.0),

3.3.14 (Version 1.0), 3.3.15 (Version 1.0), 3.3.16 (Version 1.0): Unless

otherwise agreed, invoices should state the net billing rate, rather than the

maximum discount Tariff rate and the discount amount. The imbalance

statement should be rendered prior to or with the invoice. The invoice

should 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. Prior period adjustment time limits should

be 6 months from the date of the initial invoice and 7 months from date of

initial sales invoice with a 3-month rebuttal period, excluding government-

required rate changes. This standard shall not apply in the case of