The Intermodal Surface Transportation Efficiency Act of 1991, referred to in subsec. (b), is Pub. L. 102–240, Dec. 18, 1991, 105 Stat. 1914. For complete classification of this Act to the Code, see Short Title of 1991 Amendment note set out under section 101 of Title 49, Transportation, and Tables.

A prior section 511, formerly 510, added Pub. L. 90–495, § 30, Aug. 23, 1968, 82 Stat. 834; renumbered § 511, Pub. L. 91–605, title I, § 117(a), Dec. 31, 1970, 84 Stat. 1724, related to authority of Secretary, prior to repeal by Pub. L. 91–646, title II, § 220(a)(10), Jan. 2, 1971, 84 Stat. 1903.

Another prior section 511 was renumbered section 512 of this title and subsequently repealed.