MarkWest Pioneer, L.L.C.

Original Volume No. 1

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

Original Sheet No. 64 Original Sheet No. 64

GENERAL TERMS AND CONDITIONS

(Continued)

9.1.3. Third, nominations for AOS under Rate Schedules FT-1 and FT-2 and

nominations under Rate Schedule IT; if all such nominations cannot

be satisfied, Transporter shall schedule nominations within this

priority level by price from highest to lowest; provided that

scheduling will be pro rata based on nominated quantities among

Shippers paying the same rate; and provided further that, for

purposes of scheduling nominations under this section, Negotiated

Rates that exceed the maximum Recourse Rate will be treated as

though equal to the maximum Recourse Rate.

9.1.4. Fourth, any other nominations for services under this Tariff.

9.2. Transporter shall use service requester provided rankings when making

reductions during the scheduling and curtailment process when this does not

conflict with tariff-based rules. Pursuant to NAESB Standard 2.3.26, the

time limitation for disputes of allocations shall be six (6) months from the

date of the initial month-end allocation with a three (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.