Section, added
Pub. L. 91–172, title VII, § 705(a), Dec. 30, 1969,
83 Stat. 670; amended
Pub. L. 93–625, § 3(b), Jan. 3, 1975,
88 Stat. 2109;
Pub. L. 94–455, title XIX, § 1906(b)(13)(A), Oct. 4, 1976,
90 Stat. 1834, related to amortization of certain railroad rolling stock.