1987—Subsec. (c). Pub. L. 100–203 substituted “section 6655 (h)” for “section 6655 (g)”.

1986—Subsec. (c)(1)(A). Pub. L. 99–514 amended subpar. (A) generally, restating existing provisions as cl. (i) and adding cl. (ii).

Pub. L. 99–499 amended subsec. (c)(1)(A), as amended by the Tax Reform Act of 1986 (Pub. L. 99–514), by striking out “plus” at end of cl. (i), substituting “plus” for “over” at end of cl. (ii), and adding cl. (iii).

1976—Subsecs. (a), (b), (d). Pub. L. 94–455 struck out “or his delegate” after “Secretary” wherever appearing.

Amendment by Pub. L. 100–203 applicable to taxable years beginning after Dec. 31, 1987, see section 10301(c) of Pub. L. 100–203, set out as a note under section 585 of this title.

Amendment by Pub. L. 99–514 applicable to taxable years beginning after Dec. 31, 1986, with certain exceptions and qualifications, see section 701(f) of Pub. L. 99–514, set out as an Effective Date note under section 55 of this title.

Amendment by Pub. L. 99–499 applicable to taxable years beginning after Dec. 31, 1986, see section 516(c) of Pub. L. 99–499, set out as a note under section 26 of this title.

Section applicable with respect to taxable years beginning after Dec. 31, 1967, except as provided by section 104 of Pub. L. 90–364, set out as notes under sections 6154 and 51 of this title, see section 103(f) of Pub. L. 90–364, set out as an Effective Date of 1968 Amendment note under section 6154 of this title.

For applicability of amendment by Pub. L. 99–514 notwithstanding any treaty obligation of the United States in effect on Oct. 22, 1986, see section 1012(aa)(2) of Pub. L. 100–647, set out as a note under section 861 of this title.