Section 501, Pub. L. 91–518, title I, § 101, Oct. 30, 1970, 84 Stat. 1328; Pub. L. 96–73, title I, § 102, Sept. 29, 1979, 93 Stat. 537; Pub. L. 97–35, title XI, § 1171, Aug. 13, 1981, 95 Stat. 687, related to congressional findings on needs for cost- and energy-efficient intercity rail passenger service. See section 24101 of Title 49, Transportation.

Section 501a, Pub. L. 91–518, title I, § 102, as added Pub. L. 96–73, title I, § 103(a), Sept. 29, 1979, 93 Stat. 537; amended Pub. L. 97–35, title XI, § 1172, Aug. 13, 1981, 95 Stat. 688, enumerated goals established by Congress for Amtrak. See section 24101 of Title 49.

A prior section 102 of Pub. L. 91–518 was renumbered section 103 and classified to section 502 of this title, prior to repeal by Pub. L. 103–272, § 7(b).

Section 502, Pub. L. 91–518, title I, § 103, formerly § 102, Oct. 30, 1970, 84 Stat. 1328; Pub. L. 93–146, § 2, Nov. 3, 1973, 87 Stat. 548; renumbered § 103 and amended Pub. L. 96–73, title I, §§ 103(a), 104, Sept. 29, 1979, 93 Stat. 537, 538; Pub. L. 97–35, title XI, § 1173, Aug. 13, 1981, 95 Stat. 689; Pub. L. 99–272, title IV, § 4012, Apr. 7, 1986, 100 Stat. 109; Pub. L. 102–533, § 8, Oct. 27, 1992, 106 Stat. 3519, defined terms for purposes of this chapter. See section 24102 of Title 49, Transportation.