2009—Pub. L. 111–92 inserted “(or portion of the calendar year)” after “during the calendar year” in concluding provisions and substituted “through 2010 and the first 6 months of calendar year 2011” for “through 2009” in par. (1) and “the remainder of calendar year 2011” for “calendar year 2010” in par. (2).

2008—Par. (1). Pub. L. 110–343, § 404(a)(1), substituted “through 2009” for “through 2008”.

Par. (2). Pub. L. 110–343, § 404(a)(2), substituted “calendar year 2010” for “calendar year 2009”.

2007—Par. (1). Pub. L. 110–140, § 1501(a)(1), substituted “2008” for “2007”.

Par. (2). Pub. L. 110–140, § 1501(a)(2), substituted “2009” for “2008”.

1997—Par. (1). Pub. L. 105–34, § 1035(1), substituted “2007” for “1998”.

Par. (2). Pub. L. 105–34, § 1035(2), substituted “2008” for “1999”.

1993—Par. (1). Pub. L. 103–66, § 13751(1), substituted “1998” for “1996”.

Par. (2). Pub. L. 103–66, § 13751(2), substituted “1999” for “1997”.

1991—Par. (1). Pub. L. 102–164, § 402(1), substituted “1996” for “1995”.

Par. (2). Pub. L. 102–164, § 402(2), substituted “1997” for “1996”.

1990—Par. (1). Pub. L. 101–508, § 11333(a)(1), substituted “1988 through 1995” for “1988, 1989, and 1990”.

Par. (2). Pub. L. 101–508, § 11333(a)(2), substituted “1996” for “1991”.

1987—Pars. (1), (2). Pub. L. 100–203 amended pars. (1) and (2) generally. Prior to amendment, pars. (1) and (2) read as follows:

“(1) 6.2 percent, in the case of a calendar year beginning before the first calendar year after 1976, as of January 1 of which there is not a balance of repayable advances made to the extended unemployment compensation account (established by section 905(a) of the Social Security Act); or

“(2) 6.0 percent, in the case of such first calendar year and each calendar year thereafter;”.

1986—Par. (1). Pub. L. 99–514 substituted “unemployment” for “unemployed”.

1982—Par. (1). Pub. L. 97–248, § 271(c)(1)(A), substituted “6.2 percent” for “3.5 percent”.

Pub. L. 97–248, § 271(b)(1), substituted “3.5 percent” for “3.4 percent”.

Par. (2). Pub. L. 97–248, § 271(c)(1)(B), substituted “6.0 percent” for “3.2 percent”.

1976—Pub. L. 94–566 substituted provisions imposing an excise tax equal to 3.4 percent, in the case of a calendar year beginning before the first calendar year after 1976, as of January 1 of which there is not a balance of repayable advances made to the extended unemployed compensation account (established by section 905(a) of the Social Security Act), or 3.2 percent, in the case of such first calendar year and each calendar year thereafter, of the total wages (as defined in section 3306(b)) paid by him during the calendar year with respect to employment (as defined in section 3306(c)), for provisions imposing an excise tax for the calendar year 1970 and each calendar year thereafter, with respect to having individuals in his employ, equal to 3.2 percent of the total wages (as defined in section 3306(b)) paid by him during the calendar year with respect to employment (as defined in section 3306(c)) and provisions that, in the case of wages paid during the calendar year 1973, the rate of such tax should be 3.28 percent in lieu of 3.2 percent.

Pub. L. 94–455 substituted “each calendar year” for “the calendar year 1970 and each calendar year thereafter” and struck out provisions relating to the rate of tax in the case of wages paid during the calendar year 1973.

1972—Pub. L. 92–329 inserted provisions setting forth the rate of tax in the case of wages paid during the calendar year 1973.

1970—Pub. L. 91–373 increased the rate from 3.1 percent to 3.2 percent and struck out provisions setting special rates for wages paid during 1962 and 1963.

1963—Pub. L. 88–31 reduced the tax rate for the year 1963 from 3.5 percent to 3.35 percent.

1961—Pub. L. 87–6 provided for a tax rate of 3.5 percent for calendar years 1962 and 1963.

1960—Pub. L. 86–778 substituted “1961” for “1955” and “3.1 percent” for “3 percent”.

Pub. L. 111–92, § 10(b), Nov. 6, 2009, 123 Stat. 2989, provided that: “The amendments made by this section [amending this section] shall apply to wages paid after December 31, 2009.”

Pub. L. 110–343, div. B, title IV, § 404(b), Oct. 3, 2008, 122 Stat. 3860, provided that: “The amendments made by this section [amending this section] shall apply to wages paid after December 31, 2008.”

Pub. L. 110–140, title XV, § 1501(b), Dec. 19, 2007, 121 Stat. 1800, provided that: “The amendments made by this section [amending this section] shall apply to wages paid after December 31, 2007.”

Amendment by Pub. L. 110–140 effective on the date that is 1 day after Dec. 19, 2007, see section 1601 of Pub. L. 110–140, set out as an Effective Date note under section 1824 of Title 2, The Congress.

Pub. L. 101–508, title XI, § 11333(b), Nov. 5, 1990, 104 Stat. 1388–470, provided that: “The amendments made by this section [amending this section] shall apply to wages paid after December 31, 1990.”

Pub. L. 100–203, title IX, § 9153(b), Dec. 22, 1987, 101 Stat. 1330–326, provided that: “The amendment made by subsection (a) [amending this section] shall apply to wages paid on or after January 1, 1988.”

Pub. L. 97–248, title II, § 271(d)(1), (2), formerly § 271(b)(1), (2), Sept. 3, 1982, 96 Stat. 555, as redesignated by Pub. L. 98–601, § 1(a), Oct. 30, 1984, 98 Stat. 3147, provided that: “(1) Subsections (a) and (b).—The amendments made by subsections (a) and (b) [amending this section, sections 3306 and 6157 of this title, and sections 1101 and 1105 of Title 42, The Public Health and Welfare] shall apply to remuneration paid after December 31, 1982. “(2) Subsection (c).—The amendments made by subsection (c) [amending this section, sections 3302 and 6157 of this title, and section 1101 of Title 42] shall apply to remuneration paid after December 31, 1984.”

Pub. L. 94–566, title II, § 211(d)(2), Oct. 20, 1976, 90 Stat. 2677, provided that: “The amendment made by subsection (b) [amending this section] shall apply to remuneration paid after December 31, 1976.”

Pub. L. 91–373, title III, § 301(a), Aug. 10, 1970, 84 Stat. 713, provided that the amendment made by that section is effective with respect to remuneration paid after Dec. 31, 1969.

Pub. L. 86–778, title V, § 523(c), Sept. 13, 1960, 74 Stat. 982, provided that: “The amendments made by subsection (a) [amending this section] shall apply only with respect to the calendar year 1961 and calendar years thereafter.”

For provisions directing that if any amendments made by subtitle A or subtitle C of title XI [§§ 1101–1147 and 1171–1177] or title XVIII [§§ 1800–1899A] of Pub. L. 99–514 require an amendment to any plan, such plan amendment shall not be required to be made before the first plan year beginning on or after Jan. 1, 1989, see section 1140 of Pub. L. 99–514, as amended, set out as a note under section 401 of this title.