18 C.F.R. § 2.19
(a) In determining whether the proposed hydroelectric project is best adapted to a comprehensive plan under section (10)(a)(1) of the Federal Power Act for improving or developing a waterway, the Commission will consider the extent to which the project is consistent with a comprehensive plan (where one exists) for improving, developing, or conserving a waterway or waterways affected by the project that is prepared by:
(b) The Commission will treat as a state or Federal comprehensive plan a plan that:
[Order 481-A, 53 FR 15804, May 4, 1988]