Section 621, Pub. L. 91–518, title VII, § 701, Oct. 30, 1970, 84 Stat. 1339; Pub. L. 94–25, § 12, May 26, 1975, 89 Stat. 93, provided for interim authority to provide emergency financial assistance for railroads operating passenger service.

Section 622, Pub. L. 91–518, title VII, § 702, Oct. 30, 1970, 84 Stat. 1339, authorized appropriations for this subchapter.