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PART 1 -- INCOME TAXES

Authority: Sec. 7805, 68A Stat. 917 (26 U.S.C. 7805), unless otherwise noted:

Section 1.1(h)-1 is also issued under 26 U.S.C. 1(h);

Section 1.25A-1 also issued under section 26 U.S.C. 25A(i);

Section 1.25A-2 also issued under section 26 U.S.C. 25A(i);

Section 1.25A-3 also issued under section 26 U.S.C. 25A(i);

Section 1.25A-4 also issued under section 26 U.S.C. 25A(i);

Section 1.25A-5 also issued under section 26 U.S.C. 25A(i);

Section 1.25-1T also issued under 26 U.S.C. 25;

Section 1.25-2T also issued under 26 U.S.C. 25;

Section 1.25-3 also issued under 26 U.S.C. 25;

Section 1.25-3T also issued under 26 U.S.C. 25;

Section 1.25-4T also issued under 26 U.S.C. 25;

Section 1.25-5T also issued under 26 U.S.C. 25;

Section 1.25-6T also issued under 26 U.S.C. 25;

Section 1.25-7T also issued under 26 U.S.C. 25;

Section 1.25-8T also issued under 26 U.S.C. 25;

Section 1.28-0 also issued under 26 U.S.C. 28(d)(5);

Section 1.28-1 also issued under 26 U.S.C. 28(d)(5);

Section 1.30-1 also issued under 26 U.S.C. 30(d)(2);

Section 1.36B-0 also issued under 26 U.S.C. 36B(g);

Section 1.36B-5 also issued under 26 U.S.C. 36B(g);

Section 1.36B-4 also issued under 26 U.S.C. 36B(g);

Section 1.41-4 also issued under 26 U.S.C. 41(d)(4)(E);

Section 1.41-6 also issued under 26 U.S.C. 41(f)(1) and 1502;

Section 1.41-6T also issued under 26 U.S.C. 41(f)(1);

Section 1.41-8 also issued under 26 U.S.C. 41(c)(4)(B);

Section 1.41-9 also issued under 26 U.S.C. 41(c)(5)(C);

Section 1.42-1T also issued under 26 U.S.C. 42(n);

Section 1.42-3 also issued under 26 U.S.C. 42(n);

Section 1.42-4 also issued under 26 U.S.C. 42(n);

Section 1.42-5 also issued under 26 U.S.C. 42(n);

Sections 1.42-6, 1.42-8, 1.42-9, 1.42-10, 1.42-11, and 1.42-12 also issued under 26 U.S.C. 42(n);

Section 1.42-13 also issued under 26 U.S.C. 42(n);

Section 1.42-14 also issued under 26 U.S.C. 42(n);

Section 1.42-15 is also issued under 26 U.S.C. 42(n);

Section 1.42-16 also issued under 26 U.S.C. 42(n);

Section 1.42-17 also issued under 26 U.S.C. 42(n);

Section 1.42-18 also issued under 26 U.S.C. 42(h)(6)(F) and 42(h)(6)(K);

Sections 1.43-0 through 1.43-7 also issued under section 26 U.S.C. 43;

Section 1.43-3T also issued under 26 U.S.C. 43(c)(2)(B);

Section 1.45D-1 also issued under 26 U.S.C. 45D(e)(2) and (i);

Section 1.45G-1 also issued under 26 U.S.C. 45G(e)(2);

Section 1.45G-1T also issued under 26 U.S.C. 45G(e)(2);

Sections 1.45Q-1, 1.45Q-2 , 1.45Q-3, 1.45Q-4, and 1.45Q-5 also issued under 26 U.S.C. 45Q(h).

Section 1.45Q-3 also issued under 26 U.S.C. 45Q(f)(2).

Section 1.45Q-4 also issued under 26 U.S.C. 45Q(f)(5).

Section 1.45Q-5 also issued under 26 U.S.C. 45Q(f)(4).

Section 1.46-5 also issued under 26 U.S.C. 46(d)(6) and 26 U.S.C. 47(a)(3)(C);

Section 1.46-6 also issued under 26 U.S.C. 46(f)(7);

Section 1.47-1 also issued under 26 U.S.C. 47(a);

Section 1.48-9 also issued under 26 U.S.C. 38(b) (as in effect before the amendments made by Subtitle F of the Tax Reform Act of 1984);

Section 1.48(e)-1 issued under 26 U.S.C. 48;

Section 1.48D-6T also issued under 26 U.S.C. 48D(d)(2)(E) and (6);

Section 1.48D-6 also issued under 26 U.S.C. 48D(d)(6);

Sections 1.50A-1 --1.50B-5 also issued under 85 Stat. 553 (26 U.S.C. 40(b));

Section 1.52-1 also issued under 26 U.S.C. 52(b);

Section 1.56(g)-1 also issued under section 7611(g)(3) of the Omnibus Budget Reconciliation Act of 1989 (Pub. L. 101-239, 103 Stat. 2373);

Section 1.59A-0 also issued under 26 U.S.C. 59A(i).

Section 1.59A-1 also issued under 26 U.S.C. 59A(i).

Section 1.59A-2 also issued under 26 U.S.C. 59A(i).

Section 1.59A-3 also issued under 26 U.S.C. 59A(i).

Section 1.59A-4 also issued under 26 U.S.C. 59A(i).

Section 1.59A-5 also issued under 26 U.S.C. 59A(i).

Section 1.59A-6 also issued under 26 U.S.C. 59A(i).

Section 1.59A-7 also issued under 26 U.S.C. 59A(i).

Section 1.59A-8 also issued under 26 U.S.C. 59A(i).

Section 1.59A-9 also issued under 26 U.S.C. 59A(i).

Section 1.59A-10 also issued under 26 U.S.C. 59A(i).

Section 1.6417-5T also issued under 26 U.S.C. 6417(d)(5) and (h).

Section 1.6418-4T also issued under 26 U.S.C. 6418(g)(1) and (h).

Source: T.D. 6500, 25 FR 11402, Nov. 26, 1960; 25 FR 14021, Dec. 21, 1960, unless otherwise noted.

Authority amended by T.D. 8420, 57 FR 2479-24750, June 11, 1992; T.D. 8448, 57 FR 5419-54931, Nov. 23, 1992; T.D. 8479, 58 FR 33763-33764, June 21, 1993; T.D. 8520, 59 FR 10067-10075, Mar. 3, 1994; T.D. 8563, 59 FR 50161-50166, Oct. 3, 1994; T.D. 8606, 60 FR 39649-39652, Aug. 3, 1995; T.D. 8692, 61 FR 66212-66215, Dec. 17, 1996; T.D. 8713, 62 FR 3792-3793, Jan. 27, 1997; T.D. 8731, 62 FR 50502-50503, Sept. 26, 1997; T.D. 8732, 62 FR 50503-50506, Sept. 26, 1997; T.D. 8859, 65 FR 2323-2329, Jan. 14, 2000, T.D. 8902, 65 FR 57092-57101, Sept. 19, 2000; T.D. 8971, 66 FR 66307-66314, Dec. 26, 2001; T.D. 9034, 67 FR 78687-78698, Dec. 26, 2002; T.D. 9205, 70 FR 29596-29607, May 24, 2005; T.D. 9296, 71 FR 65722-65732, Nov. 9, 2006; T.D. 9401, 73 FR 34185-34190, June 17, 2008; T.D. 9528, 76 FR 33994-33997, June 10, 2011; T.D. 9560, 76 FR 75774-75781, Dec. 5, 2011; T.D. 9587, 77 FR 26175-26181, May 3, 2012; T.D. 9590, 77 FR 30377-30400, May 23, 2012; T.D. 9663, 79 FR 26113-26120, May 7, 2014; T.D. 9753, 81 FR 9333-9338, Feb. 25, 2016; T.D. 9755, 81 FR 11104-11110, Mar. 3, 2016; T.D. 9786, 81 FR 68299-68312, Oct. 4, 2016; T.D. 9832, 83 FR 13183-13185, Mar. 28, 2018; T.D. 9848, 84 FR 6076-6080, Feb. 26, 2019; T.D. 9850, 84 FR 7283-7285, Mar. 4, 2019; T.D. 9849, 84 FR 9231-9239, Mar. 14, 2019; T.D. 9872, 84 FR 34775-34782, July 19, 2019; T.D. 9885, 84 FR 66968-67045, Dec. 6, 2019; T.D. 9944, 86 FR 4728-4773, Jan. 15, 2021; T.D. 9975, 88 FR 40086-40095, June 21, 2023; T.D. 9979, 88 FR 55506-55548, Aug. 15, 2023; T.D. 9989, 89 FR 17596-17612, Mar. 11, 2024.

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