Portland Natural Gas Transmission System

Original Volume No.1

Effective Date: 02/11/1999, Docket: CP96-248-010, Status: Effective

Substitute Original Sheet No. 323 Substitute Original Sheet No. 323 : Superseded

Superseding: Original Sheet No. 323

GENERAL TERMS AND CONDITIONS (Continued)

(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), then;

deliveries during periods under similar conditions when the meter was

registering accurately.

6.8 Preservation of Metering Records. Transporter and Shipper shall

each preserve for a period of at least three (3) Years all test data, charts

and other similar records.

7. NOMINATIONS AND SCHEDULING

7.1 Nominations.

(a) For service requested for any Nomination period under each of

Shipper's Gas Transportation Contracts, Shipper, or Shipper's agent, shall

provide Transporter with the level of information required to define a

Nomination as provided in GISB Data Set 1.4.1 Version 1.2 (a pro-forma

Nomination form is attached as Sheet No. 260 to this Tariff), as required by

the Commission in 18 C.F.R. 284.10(b) in accordance with Order No. 587-G

issued April 15, 1998. Transporter shall provide, upon request an indication

of which data elements it is using and what it is using them for. Such

Nominations are to be provided to Transporter under the timeline set forth in

Section 7.2 via EDI. All such transmissions for Nomination purposes shall

comply with all format and protocol requirements specified by the applicable

trading partner agreement. Nominations may be sent to Transporter for each

Nomination cycle described in Section 7.2 either in hard copy or facsimile not

later than one hour prior to the applicable Nomination receipt deadline.

Shippers shall have the ability to nominate for several Days, Months, or

Years, provided the Nomination begin and end dates are within the term of

Shipper's contract. There is no need to re-nominate if Intra-day Nomination

modifies existing Nomination.

All Nominations shall be considered original Nominations and must

be replaced to be changed. When a Nomination for a date range is received,

each day within the range is considered an original Nomination. When a

subsequent Nomination is received for one or more days within that range, the

previous Nomination is superseded by the subsequent Nomination only to the

extent of the days specified. The days of the previous Nomination outside the

range of the subsequent Nomination are unaffected. Nominations have a

prospective effect only.

Transporter shall support a seven-days-a-week,

twenty-four-hours-a-day Nomination process. Personnel may be reached by

beeper after normal business hours.