authority: Secs. 102(2)(A), 102(2)(C), Pub. L. 91-190, 83 Stat. 853 (
42 U.S.C. 4332); secs. 2(b), 4(f), Pub. L. 89-670, 80 Stat. 931 (
49 U.S.C. 1651(b), 1653(f)); E.O. 11514, 35 FR 4247;
40 CFR part 1500; DOT Order 5610.1B, 39 FR 35234; delegations of authority at
49 CFR 1.45, 1.51