§ 663.
(a)
Exclusions
There shall not be included as amounts falling within section 661(a) or 662(a)—
(1)
Gifts, bequests, etc.
(2)
Charitable, etc., distributions
(3)
Denial of double deduction
([Aug. 16, 1954, ch. 736], [68A Stat. 222]; [Pub. L. 91–172, title I, § 101(j)(17)], title III, § 331(b), Dec. 30, 1969, [83 Stat. 528], 598; [Pub. L. 94–455, title XIX, § 1906(b)(13)(A)], Oct. 4, 1976, [90 Stat. 1834]; [Pub. L. 105–34, title XIII], §§ 1306(a), (b), 1307(a), (b), Aug. 5, 1997, [111 Stat. 1041].)