1986—Par. (7). Pub. L. 99–514 amended par. (7) generally, substituting “alternative minimum tax” and “55” for “minimum tax for tax preferences” and “56”, respectively.
1984—Pars. (6) to (8). Pub. L. 98–369 redesignated pars. (7) and (8) as (6) and (7), respectively. Former par. (6), which referred to section 1451 for withholding of tax on tax-free covenant bonds, was struck out.
1978—Par. (7). Pub. L. 95–600 substituted “benefits of graduated rate schedule provided in section 11(b)” for “the $25,000 exemption from surtax provided in section 11(c)”.
1975—Par. (7). Pub. L. 94–12 substituted “$50,000” for “$25,000” for a limited period. See Effective and Termination Dates of 1975 Amendment note set out below.
1969—Par. (8). Pub. L. 91–172 added par. (8).
1964—Par. (8). Pub. L. 88–272 struck out par. (8) which referred to section 1503 for additional tax for corporations filing consolidated returns.
Effective Date of 1986 Amendment
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.
Effective Date of 1984 Amendment
Amendment by Pub. L. 98–369 not applicable with respect to obligations issued before