For purposes of this subpart:

(a) Commission includes an officer or employee designated as presiding officer in a proceeding under this subpart.

(b) Petitioner means a person who is aggrieved or adversely affected by a contested order, as defined in this section, and who requests a review, pursuant to this subpart, by the Commission of the denial by the Secretary.

(c) Secretary means the Secretary of Energy or his delegate.

(d) Contested order means the decision or order issued by the Secretary denying, in whole or in part, a request for adjustment.

(e) Participant means, as appropriate, the petitioner, the Secretary, or an intervener.