1988—Subsec. (b). Pub. L. 100–647 substituted “section 243 (d)(4)” for “section 243 (c)(4)”.

1987—Subsecs. (a)(3), (b)(2). Pub. L. 100–203 substituted “70 percent” for “80 percent”.

1986—Subsecs. (a)(3), (b)(2). Pub. L. 99–514 substituted “80 percent” for “85 percent”.

1978—Subsec. (a)(2)(B). Pub. L. 95–600 substituted “the highest rate of tax specified in section 11 (b)” for “the sum of the normal tax rate and the surtax rate for the taxable year prescribed by section 11”.

1964—Pub. L. 88–272 designated existing provisions as subsec. (a) and added subsec. (b).

Amendment by Pub. L. 100–647 effective, except as otherwise provided, as if included in the provisions of the Revenue Act of 1987, Pub. L. 100–203, title X, to which such amendment relates, see section 2004(u) of Pub. L. 100–647, set out as a note under section 56 of this title.

Amendment by Pub. L. 100–203 applicable to dividends received or accrued after Dec. 31, 1987, in taxable years ending after such date, see section 10221(e)(1) of Pub. L. 100–203, set out as a note under section 243 of this title.

Amendment by Pub. L. 99–514 applicable to dividends received or accrued after Dec. 31, 1986, in taxable years ending after such date, see section 611(b) of Pub. L. 99–514, set out as a note under section 246 of this title.

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.

Amendment by Pub. L. 88–272 applicable to dividends received in taxable years ending after Dec. 31, 1963, see section 214(c) of Pub. L. 88–272, set out as a note under section 243 of this title.