Part I of the Federal Power Act [ 16 U.S.C. 791a et seq.] shall not be applicable to the reaches of the main stream of the Colorado River between Hoover Dam and Glen Canyon Dam until and unless otherwise provided by Congress . ( Pub. L. 90–537, title VI, § 605 , Sept. 30, 1968 , 82 Stat. 901 .) Editorial Notes References in Text The Federal Power Act , referred to in text, is act June 10, 1920, ch. 285, 41 Stat. 1063 . Part I of the Federal Power Act is classified generally to subchapter I (§ 791a et seq.) of chapter 12 of Title 16, Conservation. For complete classification of this Act to the Code, see section 791a of Title 16 and Tables.