Amendments
1988—Subsec. (a)(1). Pub. L. 100–647 substituted “sections 1 and 55” and “sections 11 and 55” for “section 1” and “section 11”, respectively.
1978—Subsec. (c). Pub. L. 95–600 substituted provisions relating to the pro ration of each section 11 bracket amount for provisions relating to the surtax exemption.
1976—Subsecs. (a), (b). Pub. L. 94–455 struck out “or his delegate” after “Secretary” wherever appearing.
1975—Subsec. (c). Pub. L. 94–164 substituted “same ratio to the surtax exemption” for “same ratio to $25,000” in subsec. (c) as such subsec. (c) is in effect for taxable years ending after Dec. 31, 1975.
Pub. L. 94–12 substituted “$50,000” for “$25,000”.
Effective Date of 1988 Amendment
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.
Effective Date of 1978 Amendment
Amendment by Pub. L. 95–600 applicable to taxable years beginning after Dec. 31, 1978, see section 301(c) of Pub. L. 95–600, set out as a note under section 11 of this title.
Effective and Termination Dates of 1975 Amendments
Amendment by Pub. L. 94–164 applicable to taxable years beginning after Dec. 31, 1975, see section 4(e) of Pub. L. 94–164, set out as a note under section 11 of this title.
Amendment by Pub. L. 94–12 applicable to taxable years ending after Dec. 31, 1974, but to cease to apply for taxable years ending after Dec. 31, 1975, see section 305(b)(1) of Pub. L. 94–12, set out as a note under section 11 of this title.