As used in this part:

(a) Energy efficiency means the ratio of the useful output of services in air transportation to the energy consumption of such services.

(b) Energy statement is a statement of the probable impact of a major regulatory action on energy efficiency and energy conservation, contained in a decision, opinion, order, or rule.

(c) Major regulatory action is any decision by the DOT decisionmaker or administrative law judge requiring an energy statement pursuant to §313.4 of this part.

(d) NEPA means the National Environmental Policy Act of 1969.

[Doc. No. 82, 50 FR 2425, Jan. 16, 1985, as amended at 60 FR 43529, Aug. 22, 1995, as amended by Doc. No. DOT-OST-2014-0140, 84 FR 15938, Apr. 16, 2019]