1988—Subsec. (e). Pub. L. 100–647 substituted “section 59(e)” for “section 58(i)”.

1986—Subsec. (a). Pub. L. 99–514, § 411(b)(2)(C)(i), inserted reference to subsec. (d).

Subsecs. (d), (e). Pub. L. 99–514, § 411(b)(2)(A), added subsec. (d) and redesignated former subsec. (d) as (e).

1982—Subsec. (d). Pub. L. 97–248 added subsec. (d).

1976—Subsec. (b). Pub. L. 94–455 struck out “or his delegate” after “Secretary”.

Amendment by Pub. L. 100–647 effective, except as otherwise provided, as if included in the provision of the Tax Reform Act of 1986, Pub. L. 99–514, to which such amendment relates, see section 1019(a) of Pub. L. 100–647, set out as a note under section 1 of this title.

Amendment by Pub. L. 99–514 applicable to costs paid or incurred after Dec. 31, 1986, in taxable years ending after such date, with transition rule, see section 411(c) of Pub. L. 99–514 set out as a note under section 263 of this title.

Amendment by Pub. L. 97–248 applicable to taxable years beginning after Dec. 31, 1982, see section 201(e)(1) of Pub. L. 97–248, set out as a note under section 5 of this title.