In subsecs. (a) and (b), “chapter 51 of title 49” substituted for “the Hazardous Materials Transportation Act [49 App. U.S.C. 1801 et seq.]” on authority of Pub. L. 103–272, § 6(b), July 5, 1994, 108 Stat. 1378, the first section of which enacted subtitles II, III, and V to X of Title 49, Transportation.

1986—Subsec. (a). Pub. L. 99–499, § 202(a), substituted “within 30 days after October 17, 1986” for “within ninety days after December 11, 1980” and inserted “and regulated” before “as a hazardous material”.

Subsec. (b). Pub. L. 99–499, § 202(b), inserted “and regulation” after “prior to the effective date of the listing”.