MarkWest Pioneer, L.L.C.

Original Volume No. 1

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Effective Date: 04/01/2009, Docket: RP09-321-000, Status: Effective

Original Sheet No. 88 Original Sheet No. 88

GENERAL TERMS AND CONDITIONS

(Continued)

22.4.6. Where there is a PRS and an offer which is better than the bid

submitted by the PRS, Transporter will notify the PRS by 2:00 pm CCT

on the day capacity is awarded and the PRS will have until 2:30 pm

to match the better offer and obtain the right to the released

capacity. In the event the PRS does not match the better bid,

Transporter shall award the capacity to the party who made the best

bid.

22.4.7. Bids shall be binding until written or electronic notice of

withdrawal is received by Transporter. Bids cannot be withdrawn

after the bid period ends.

22.4.8. In the event that a winning bid has an unacceptable

contingency, and Transporter is not notified through the Website

that such contingency has been removed within the time period

specified in the Shipper Notice, such contingent bid will be

rejected by Transporter.

22.4.9. The Releasing Shipper may define in the Shipper Notice the criteria

for determining the best bid. If the Releasing Shipper does not

specify the criteria, Transporter shall use the highest economic

value to determine the best bid. If there are multiple bids meeting

the minimum conditions, Transporter shall award the bids, best bid

first, until all offered capacity is awarded. Transporter will

notify, through the Website by 2:00 pm CCT following the end of the

posting period, or by 3:00 pm CCT if a matching period is

applicable, the PRS or Replacement Shipper that capacity has been

awarded. Transporter shall allow re-releases on the same terms and

basis as the primary release (except as prohibited by the

Commission’s regulations).

22.4.10. Transporter will post the winning bids and Replacement Shippers’

identify on the Website for at least five (5) Business Days.