Prohibition order means:
(1) An order issued pursuant to section 301(b) of the Act that prohibits a powerplant from burning natural gas or petroleum as its primary energy source; or
(2) An order issued pursuant to section 301(c) of the Act that prohibits excessive use of natural gas or petroleum in mixtures burned by a powerplant as its primary energy source.
10 CFR § 500.2
For purposes of this part and parts 501-507 term: