Western Gas Interstate Company

Fourth Revised Volume No. 1

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Effective Date: 07/01/2003, Docket: RP03-525-000, Status: Effective

Second Revised Sheet No. 230C Second Revised Sheet No. 230C : Effective

Superseding: First Revised Sheet No. 230C

GENERAL TERMS AND CONDITIONS

(continued)

the Nomination and the Shipper has been advised by Western's gas

dispatchers that the revised service, as in Section 19.1, is

scheduled to commence. Shipper shall advise Western as soon as

possible with respect to any Force Majeure or adverse weather

conditions affecting its service.

19.3 Intra-day nominations - Shippers are permitted to make intra-day

nominations. An intra-day nomination is defined as a nomination

submitted after the nomination deadline whose effective time is no

earlier than the beginning of the gas day and runs through the end

of that gas day. Intra-day nominations may be used to request

increases or decreases in total flow, changes to receipt points,

or changes to delivery points of scheduled gas.

Except where specified in other North American Energy Standards

Board ("NAESB") standards, all nomination procedures that apply

to intra-day nominations, including the process (excluding

timelines) of quick response, confirming with upstream and

downstream parties and scheduling.

Intra-day nominations do not roll-over (i.e. intra-day nominations

span one day only). Intra-day nominations do not replace the

remainder of the standing nomination. There is no need to

re-nominate if the intra-day nomination modifies the existing

nomination.

The Intraday Nomination Cycles shall be as follows:

(a) Intraday 1 Nomination Cycle: 10:00 am for nominations leaving

control of the nominating party; 10:15 am for receipt of

nominations by the transporter (including from TTTSPs); 10:30

am to send Quick Response; 1:00 pm for receipt of completed

confirmations by Western from upstream and downstream connected

parties; 2:00 pm for Western to provide scheduled quantities to

affected shippers and point operators, and to provide scheduled

quantities to bumped parties (notice to bumped parties),

(central clock time on the gas day). Scheduled quantities

resulting from Intraday 1 Nominations shall be effective at

5:00 pm on gas day.

(b) The Intraday 2 Nomination Cycle: 5:00 pm for nominations

leaving control of the nominating party; 5:15 pm for receipt of

nominations by the transporter (including TTTSPs); 5:30 pm to

send Quick Response; 8:00 pm for receipt of completed

confirmations by Western from upstream and downstream connected

parties; 9:00 pm for Western to provide scheduled quantities to

affected shippers and point operators (central clock time on gas

day). Scheduled quantities resulting from Intraday 2

Nominations shall be effective at 9:00 pm on gas day. Bumping

is not allowed during the Intraday 2 Nomination Cycle.