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26 U.S.C. 7805, unless otherwise noted. Section 1.1(h)-1 also issued under 26 U.S.C. 1(h); Section 1.21-1 also issued under 26 U.S.C. 21(f); See Part 1 for more
T.D. 6500, 25 FR 11402, Nov. 26, 1960; 25 FR 14021, Dec. 21, 1960; T.D. 9989, 89 FR 17606, Mar. 11, 2024, unless otherwise noted. T.D. 6500, 25 FR 11402, Nov. 26, 1960; 25 FR 14021, Dec. 21, 1960, unless otherwise noted. T.D. 6500, 25 FR 11402, Nov. 26, 1960; 25 FR 14021, Dec. 31, 1960, T.D. 9381, 73 FR 8604, Feb. 15, 2008, unless otherwise noted. See Part 1 for more
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The provisions of section 183 and the regulations thereunder shall apply only with respect to taxable years beginning after December 31, 1969. For provisions applicable to prior taxable years, see section 270 and § 1.270-1.
[T.D. 7198, 37 FR 13685, July 13, 1972]