The date of the enactment of this section, referred to in subsecs. (a)(2), (d)(2), refers to the date of enactment of Pub. L. 87–870, which was approved Oct. 23, 1962.

1995—Subsec. (d)(1)(A), (B). Pub. L. 104–88 substituted “rail carriers subject to part A of subtitle IV” for “domestic railroad corporations providing transportation subject to subchapter I of chapter 105”.

1978—Subsec. (d)(1)(A). Pub. L. 95–473, § 2(a)(2)(D), substituted “providing transportation subject to subchapter I of chapter 105 of title 49” for “subject to part I of the Interstate Commerce Act (49 U.S.C. 1 and following)”.

Subsec. (d)(1)(B). Pub. L. 95–473, § 2(a)(2)(E), substituted “providing transportation subject to subchapter I of chapter 105 of title 49” for “subject to part I of the Interstate Commerce Act”.

1976—Subsec. (d)(1)(A). Pub. L. 94–455, § 1901(a) (40)(A), inserted “(49 U.S.C. 1 and following)” after “Interstate Commerce Act”.

Subsecs. (e), (f). Pub. L. 94–455, §§ 1901(a)(40)(B), 1906(b)(13)(A), redesignated subsec. (f) as (e) and struck out “or his delegate” after “Secretary”. Former subsec. (e), which made special provision for the application of this section to taxable years ending before Oct. 23, 1962, was struck out.

Amendment by Pub. L. 104–88 effective Jan. 1, 1996, see section 2 of Pub. L. 104–88, set out as an Effective Date note under section 1301 of Title 49, Transportation.

Amendment by section 1901(a)(40) of Pub. L. 94–455 effective for taxable years beginning after Dec. 31, 1976, see section 1901(d) of Pub. L. 94–455, set out as a note under section 2 of this title.

Pub. L. 87–870, § 2(a), Oct. 23, 1962, 76 Stat. 1160, provided that: “The amendments made by the first section of this Act [enacting this section] shall apply with respect to taxable years beginning after December 31, 1953, and ending after August 16, 1954.”

Pub. L. 87–870, § 2(b), Oct. 23, 1962, 76 Stat. 1160, as amended by Pub. L. 99–514, § 2, Oct. 22, 1986, 100 Stat. 2095, provided that: “Provisions having the same effect as section 281 of the Internal Revenue Code of 1986 [formerly I.R.C. 1954] (as added by the first section of this Act) shall be deemed to be included in the Internal Revenue Code of 1939, effective with respect to all taxable years to which such Code applies.”