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

Superseding: First Revised Sheet No. 230A

GENERAL TERMS AND CONDITIONS

(continued)

(b) The Timely Nomination Cycle shall be as follows: 11:30 am

for nominations leaving the control of the nominating party;

11:45 am for receipt of nominations by the transporter

(including from Title Transfer Tracking Service Providers

(TTTSPs); noon to send Quick Response; 3:30 pm for receipt

of completed confirmations by Western from upstream and

downstream connected parties; 4:30 pm for receipt of

scheduled quantities by shipper and point operator (central

clock time on the day prior to flow).

In addition to making scheduled quantities information

available by 4:30 pm, at the end of each day, Western will

make available to shippers information containing scheduled

quantities, including scheduled intra-day nominations and

any other scheduling changes.

(c) The Evening Nomination Cycle shall be as follows: 6:00 pm

for nominations leaving control of the nominating party;

6:15 for receipt of nominations by the transporter (including

from TTTSPs); 6:30 pm to send Quick Response; 9:00 pm for

receipt of completed confirmations by Western from upstream

and downstream connected parties; 10:00 pm for Transportation

Service Provider 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 day prior to flow).

Scheduled quantities resulting from an Evening Nomination

that does not cause another shipper to receive notice that

it is being bumped shall be effective at 9:00 am on gas day;

and when an Evening Nomination causes another shipper to

receive notice that it is being bumped, the scheduled

quatities shall be effective at 9:00 am on gas day.

(d) Nominations received after the nomination deadline will be

scheduled after nominations received before the nomination

deadline.

(e) Shipper must adhere to the nomination, confirmation and

scheduling deadlines, except that Western may waive the

deadlines.

(f) All nominations, excluding intra-day nominations shall have

roll-over options. Shippers 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.

(g) Confirmations -- Western will initiate confirmation. Shipper

may relieve Western of its obligation to send a confirmation

to Shipper.

(h) At a receipt or delivery point, the lesser of rule (confirmed

or nominated flow) applies when confirming. If no communication

is received, the lesser of the new nomination or previously

scheduled quantity applies.

(i) Overrun quantities should be requested on a separate

transaction.