The Federal Insurance Contributions Act, referred to in subsec. (a)(2), is act Aug. 16, 1954, ch. 736, §§ 3101, 3102, 3111, 3112, 3121 to 3128, 68A Stat. 415, which is classified generally to chapter 21 (§ 3101 et seq.) of this title. For complete classification of this Act to the Code, see section 3128 of this title and Tables.

1990—Subsec. (a)(2), (3). Pub. L. 101–508, § 11801(c)(22)(E)(i), substituted period for semicolon at end of par. (2) and struck out par. (3) which cross-referenced former chapter 37 relating to tax on sugar.

Subsec. (b)(2), (3). Pub. L. 101–508, § 11801(c)(22)(E)(ii), substituted period for semicolon at end of par. (2) and struck out par. (3) which cross-referenced former section 6418(b) relating to the exportation of sugar to Puerto Rico.

1986—Subsec. (b). Pub. L. 99–514 added par. (1) and redesignated former pars. (1) and (2) as (2) and (3), respectively.

1976—Subsec. (a)(3), (5). Pub. L. 94–455 substituted “Chapter 37” for “Subchapter A of chapter 37” in par. (5) and redesignated par. (5) as (3).

1970—Subsec. (a)(3), (4). Pub. L. 91–513 struck out pars. (3) and (4) relating to taxes in respect of narcotic drugs and taxes in respect of marihuana, respectively, and making references to parts I and III of subchapter A of chapter 39 and to parts II and III of subchapter A of chapter 39, respectively.

1958—Subsec. (a)(5), (6). Pub. L. 85–859 redesignated par. (6) as (5) and struck out former par. (5) which contained a cross reference to chapter 51 of this title.

Amendment by Pub. L. 99–514 applicable to taxable years beginning after Dec. 31, 1986, with certain exceptions and qualifications, see section 1277 of Pub. L. 99–514, set out as a note under section 931 of this title.

Amendment by Pub. L. 91–513 effective on first day of seventh calendar month that begins after Oct. 26, 1970, see section 1105(a) of Pub. L. 91–513, set out as an Effective Date note under section 951 of Title 21, Food and Drugs.

Amendment by Pub. L. 85–859 effective Sept. 3, 1958, see section 210(a)(1) of Pub. L. 85–859, set out as an Effective Date note under section 5001 of this title.

For provisions that nothing in amendment by Pub. L. 101–508 be construed to affect treatment of certain transactions occurring, property acquired, or items of income, loss, deduction, or credit taken into account prior to Nov. 5, 1990, for purposes of determining liability for tax for periods ending after Nov. 5, 1990, see section 11821(b) of Pub. L. 101–508, set out as a note under section 45K of this title.

Prosecutions for any violation of law occurring, and civil seizures or forfeitures and injunctive proceedings commenced, prior to the effective date of amendment of this section by section 1102 of Pub. L. 91–513 not to be affected or abated by reason thereof, see section 1103 of Pub. L. 91–513, set out as a note under sections 171 to 174 of Title 21, Food and Drugs.