For inflation adjustment of certain items in this section, see Revenue Procedures listed in a table under section 1 of this title (starting with 2012) and Internal Revenue Service announcements listed in a table below (2010 and 2011).

The date of the enactment of this paragraph, referred to in subsec. (e)(1)(B)(ii)(II), is the date of enactment of Pub. L. 105–34, which was approved Aug. 5, 1997.

The Airport and Airway Development Act of 1970, referred to in subsec. (f), is title I of Pub. L. 91–258, May 21, 1970, 84 Stat. 219, which was classified principally to chapter 25 (§ 1701 et seq.) of former Title 49, Transportation. Sections 1 to 30 of title I of Pub. L. 91–258, which enacted sections 1701 to 1703, 1711 to 1713, and 1714 to 1730 of former Title 49 and a provision set out as a note under section 1701 of former Title 49, were repealed by Pub. L. 97–248, title V, § 523(a), Sept. 3, 1982, 96 Stat. 695. Sections 31, 51, 52(a), (b)(4), (6), (c), (d), and 53 of title I of Pub. L. 91–258 were repealed by Pub. L. 103–272, § 7(b), July 5, 1994, 108 Stat. 1379, the first section of which enacted subtitles II, III, and V to X of Title 49, Transportation. For complete classification of this Act to the Code, see Tables. For disposition of sections of former Title 49, see table at the beginning of Title 49.

The date of the enactment of the Airport and Airway Trust Fund Tax Reinstatement Act of 1997, referred to in subsec. (k)(1)(A)(i), is the date of enactment of Pub. L. 105–2, which was approved Feb. 28, 1997.

2024—Subsec. (j). Pub. L. 118–63, § 1302(c)(3), substituted “September 30, 2028” for “May 10, 2024”.

Pub. L. 118–41, § 202(c)(3), substituted “May 10, 2024” for “March 8, 2024”.

Subsec. (k)(1)(A)(ii). Pub. L. 118–63, § 1302(b)(1), substituted “September 30, 2028” for “May 10, 2024”.

Pub. L. 118–41, § 202(b)(1), substituted “May 10, 2024” for “March 8, 2024”.

2023—Subsec. (j). Pub. L. 118–34, § 202(c)(3), substituted “March 8, 2024” for “December 31, 2023”.

Pub. L. 118–15, § 2212(c)(3), substituted “December 31, 2023” for “September 30, 2023”.

Subsec. (k)(1)(A)(ii). Pub. L. 118–34, § 202(b)(1), substituted “March 8, 2024” for “December 31, 2023”.

Pub. L. 118–15, § 2212(b)(1), substituted “December 31, 2023” for “September 30, 2023”.

2018—Subsec. (b)(1). Pub. L. 115–141, § 401(b)(42), substituted “a tax in the amount of $3.00.” for “a tax in the amount determined in accordance with the following table for the period in which the segment begins:” and table which set out tax amounts ranging from $1.00 to $3.00 for segments beginning after Sept. 30, 1997, to 2002 and thereafter.

Subsec. (j). Pub. L. 115–254, § 802(c)(3), substituted “September 30, 2023” for “September 30, 2018”.

Pub. L. 115–141, § 202(c)(2), substituted “September 30, 2018” for “March 31, 2018”.

Subsec. (k)(1)(A)(ii). Pub. L. 115–254, § 802(b)(1), substituted “September 30, 2023” for “September 30, 2018”.

Pub. L. 115–141, § 202(b)(1), substituted “September 30, 2018” for “March 31, 2018”.

2017—Subsec. (e)(4)(A)(ii). Pub. L. 115–97, § 11002(d)(1)(FF), substituted “for ‘calendar year 2016’ in subparagraph (A)(ii)” for “for ‘calendar year 1992’ in subparagraph (B)”.

Subsec. (e)(5). Pub. L. 115–97, § 13822(a), added par. (5).

Subsec. (j). Pub. L. 115–63, § 202(c)(2), substituted “March 31, 2018” for “September 30, 2017”.

Subsec. (k)(1)(A)(ii). Pub. L. 115–63, § 202(b)(1), substituted “March 31, 2018” for “September 30, 2017”.

2016—Subsec. (j). Pub. L. 114–190, § 1202(c)(2), substituted “September 30, 2017” for “July 15, 2016”.

Pub. L. 114–141, § 202(c)(2), substituted “July 15, 2016” for “March 31, 2016”.

Subsec. (k)(1)(A)(ii). Pub. L. 114–190, § 1202(b)(1), substituted “September 30, 2017” for “July 15, 2016”.

Pub. L. 114–141, § 202(b)(1), substituted “July 15, 2016” for “March 31, 2016”.

2015—Subsec. (j). Pub. L. 114–55, § 202(c)(2), substituted “March 31, 2016” for “September 30, 2015”.

Subsec. (k)(1)(A)(ii). Pub. L. 114–55, § 202(b)(1), substituted “March 31, 2016” for “September 30, 2015”.

2014—Subsec. (e)(1)(C). Pub. L. 113–295, § 221(a)(104)(A), struck out subpar. (C) which provided for no phasein of reduced ticket tax for certain transportation.

Subsec. (e)(5). Pub. L. 113–295, § 221(a)(104)(B), struck out par. (5) which related to rates of ticket tax for transportation beginning before Oct. 1, 1999.

2012—Subsec. (j). Pub. L. 112–95, § 1103(c), added subsec. (j). Former subsec. (j) redesignated (k).

Subsec. (j)(1)(A)(ii). Pub. L. 112–95, § 1101(b)(1), substituted “September 30, 2015” for “February 17, 2012”.

Pub. L. 112–91 substituted “February 17, 2012” for “January 31, 2012”.

Subsec. (k). Pub. L. 112–95, § 1103(c), redesignated subsec. (j) as (k).

2011—Subsec. (j)(1)(A)(ii). Pub. L. 112–30 substituted “January 31, 2012” for “September 16, 2011”.

Pub. L. 112–27 substituted “September 16, 2011” for “July 22, 2011”.

Pub. L. 112–21 substituted “July 22, 2011” for “June 30, 2011”.

Pub. L. 112–16 substituted “June 30, 2011” for “May 31, 2011”.

Pub. L. 112–7 substituted “May 31, 2011” for “March 31, 2011”.

2010—Subsec. (j)(1)(A)(ii). Pub. L. 111–329 substituted “March 31, 2011” for “December 31, 2010”.

Pub. L. 111–249 substituted “December 31, 2010” for “September 30, 2010”.

Pub. L. 111–216 substituted “September 30, 2010” for “August 1, 2010”.

Pub. L. 111–197 substituted “August 1, 2010” for “July 3, 2010”.

Pub. L. 111–161 substituted “July 3, 2010” for “April 30, 2010”.

Pub. L. 111–153 substituted “April 30, 2010” for “March 31, 2010”.

2009—Subsec. (j)(1)(A)(ii). Pub. L. 111–116 substituted “March 31, 2010” for “December 31, 2009”.

Pub. L. 111–69 substituted “December 31, 2009” for “September 30, 2009”.

Pub. L. 111–12 substituted “September 30, 2009” for “March 31, 2009”.

2008—Subsec. (j)(1)(A)(ii). Pub. L. 110–330 substituted “March 31, 2009” for “September 30, 2008”.

Pub. L. 110–253 substituted “September 30, 2008” for “June 30, 2008”.

Pub. L. 110–190 substituted “June 30, 2008” for “February 29, 2008”.

2007—Subsec. (j)(1)(A)(ii). Pub. L. 110–161 substituted “February 29, 2008” for “September 30, 2007”.

2005—Subsec. (e)(1)(B)(i). Pub. L. 109–59, § 11122(a)(1), inserted “(in the case of any airport described in clause (ii)(III), on flight segments of at least 100 miles)” after “by air”.

Subsec. (e)(1)(B)(ii)(III). Pub. L. 109–59, § 11122(a)(2), added subcl. (III).

Subsec. (e)(4)(C). Pub. L. 109–135 substituted “imposed by subsection (b)” for “imposed subsection (b)”.

Subsec. (f). Pub. L. 109–59, § 11121(c), amended heading and text of subsec. (f) generally. Prior to amendment, text read as follows: “No tax shall be imposed under subsection (a) or (b) on air transportation by helicopter for the purpose of—

“(1) transporting individuals, equipment, or supplies in the exploration for, or the development or removal of, hard minerals, oil, or gas, or

“(2) the planting, cultivation, cutting, or transportation of, or caring for, trees (including logging operations),

but only if the helicopter does not take off from, or land at, a facility eligible for assistance under the Airport and Airway Development Act of 1970, or otherwise use services provided pursuant to section 44509 or 44913(b) or subchapter I of chapter 471 of title 49, United States Code, during such use. In the case of helicopter transportation described in paragraph (1), this subsection shall be applied by treating each flight segment as a distinct flight.”

Subsecs. (i), (j). Pub. L. 109–59, § 11123(a), added subsec. (i) and redesignated former subsec. (i) as (j).

2003—Subsec. (e)(4)(D). Pub. L. 108–176 added subpar. (D).

1997—Subsec. (a). Pub. L. 105–34, § 1031(c)(1), added subsec. (a) and struck out heading and text of former subsec. (a). Text read as follows: “There is hereby imposed upon the amount paid for taxable transportation (as defined in section 4262) of any person a tax equal to 10 percent of the amount so paid. In the case of amounts paid outside of the United States for taxable transportation, the tax imposed by this subsection shall apply only if such transportation begins and ends in the United States.”

Subsec. (b). Pub. L. 105–34, § 1031(c)(1), added subsec. (b) and struck out heading and text of former subsec. (b). Text read as follows: “There is hereby imposed upon the amount paid for seating or sleeping accommodations in connection with transportation and with respect to which a tax is imposed by subsection (a), a tax equal to 10 percent of the amount so paid.”

Subsec. (c). Pub. L. 105–34, § 1031(c)(1), added subsec. (c) and struck out heading and text of former subsec. (c). Text read as follows: “There is hereby imposed a tax of $6 upon any amount paid (whether within or without the United States) for any transportation of any person by air, if such transportation begins in the United States. This subsection shall not apply to any transportation all of which is taxable under subsection (a) (determined without regard to sections 4281 and 4282).”

Subsecs. (e), (f). Pub. L. 105–34, § 1031(c)(2), added subsec. (e) and redesignated former subsec. (e) as (f). Former subsec. (f) redesignated (g).

Subsec. (g). Pub. L. 105–34, § 1031(c)(2), redesignated subsec. (f) as (g). Former subsec. (g) redesignated (h).

Pub. L. 105–2 amended heading and text of subsec. (g) generally. Prior to amendment, text read as follows: “The taxes imposed by this section shall apply with respect to transportation beginning after August 31, 1982, and before January 1, 1996, and to transportation beginning on or after the date which is 7 calendar days after the date of the enactment of the Small Business Job Protection Act of 1996 and before January 1, 1997.”

Subsec. (g)(1)(A)(ii). Pub. L. 105–34, § 1031(b)(1), substituted “September 30, 2007” for “September 30, 1997”.

Subsec. (g)(2). Pub. L. 105–34, § 1601(f)(4)(D), inserted “on that flight” after “dedicated”.

Subsec. (h). Pub. L. 105–34, § 1435(a), added subsec. (h). Former subsec. (h) redesignated (i).

Pub. L. 105–34, § 1031(c)(2), redesignated subsec. (g) as (h).

Subsec. (i). Pub. L. 105–34, § 1435(a), redesignated subsec. (h) as (i).

1996—Subsec. (e). Pub. L. 104–188, § 1609(e), inserted at end “In the case of helicopter transportation described in paragraph (1), this subsection shall be applied by treating each flight segment as a distinct flight.”

Subsec. (f). Pub. L. 104–188, § 1609(d), amended subsec. (f) generally. Prior to amendment, subsec. (f) read as follows:

“(f) Exemption for Certain Emergency Medical Transportation.—No tax shall be imposed under this section or section 4271 on any air transportation by helicopter for the purpose of providing emergency medical services if such helicopter—

“(1) does not take off from, or land at, a facility eligible for assistance under the Airport and Airway Development Act of 1970 during such transportation, and

“(2) does not otherwise use services provided pursuant to section 44509 or 44913(b) or subchapter I of chapter 471 of title 49, United States Code, during such transportation.”

Subsec. (g). Pub. L. 104–188, § 1609(b), substituted “January 1, 1996, and to transportation beginning on or after the date which is 7 calendar days after the date of the enactment of the Small Business Job Protection Act of 1996 and before January 1, 1997” for “January 1, 1996”.

1994—Subsecs. (e), (f)(2). Pub. L. 103–272, § 5(g)(2), substituted “section 44509 or 44913(b) or subchapter I of chapter 471 of title 49, United States Code,” for “the Airport and Airway Improvement Act of 1982”.

1990—Subsecs. (a), (b). Pub. L. 101–508, § 11213(a)(1), substituted “10 percent” for “8 percent”.

Subsec. (g). Pub. L. 101–508, § 11213(d)(1), substituted “January 1, 1996” for “January 1, 1991”.

1989—Subsec. (c). Pub. L. 101–239 substituted “$6” for “$3”.

1987—Subsec. (e). Pub. L. 100–223, § 404(c), which directed the substitution of “Improvement Act” for “System Improvement Act” could not be executed because such words do not appear.

Subsec. (f). Pub. L. 100–223, § 404(a), added subsec. (f). Former subsec. (f) redesignated (g).

Pub. L. 100–223, § 402(a)(1), substituted “January 1, 1991” for “January 1, 1988”.

Subsec. (g). Pub. L. 100–223, § 404(a), redesignated former subsec. (f) as (g).

1986—Subsec. (e)(1). Pub. L. 99–514, amended par. (1) generally. Prior to amendment, par. (1) read as follows: “transporting individuals, equipment, or supplies in—

“(A) the exploration for, or the development or removal of, hard minerals, or

“(B) the exploration for oil or gas, or”.

1984—Subsec. (e)(1). Pub. L. 98–369 amended par. (1) generally, designating existing provisions as subpar. (A) and adding subpar. (B).

1982—Subsec. (e). Pub. L. 97–248 substituted provisions relating to exemptions for certain helicopter uses for provisions that effective with respect to transportation beginning after Sept. 30, 1980, the rate of taxes imposed by subsecs. (a) and (b) would be 5 percent and taxes imposed by subsec. (c) would not apply.

Subsec. (f). Pub. L. 97–248 added subsec. (f).

1980—Subsec. (e). Pub. L. 96–298 substituted “September 30, 1980” for “June 30, 1980”.

1976—Subsec. (a). Pub. L. 94–455, § 1904(a)(7)(A), struck out “which begins after June 30, 1970” after “any person”.

Subsec. (b). Pub. L. 94–455, § 1904(a)(7)(A), struck out “which begins after June 30, 1970” after “with transportation”.

Subsec. (c). Pub. L. 94–455, § 1904(a)(7)(B), struck out “and begins after June 30, 1970” after “United States”.

1970—Subsec. (a). Pub. L. 91–258 consolidated former provisions of subsecs. (a) and (b) for imposition of tax on amounts paid within and outside the United States, substituting an 8 percent rate commencing after June 30, 1970, for prior 5 percent rate commencing after Nov. 15, 1962.

Subsec. (b). Pub. L. 91–258 redesignated subsec. (c) as (b), substituting an 8 percent rate in connection with transportation which begins after June 30, 1970, and with respect to which a tax is imposed by subsec. (a) for prior 5 percent rate in connection with transportation which began after Nov. 15, 1962, and with respect to which a tax had been imposed by former provisions of subsecs. (a) and (b). Former subsec. (b) provisions for imposition of tax on amounts paid outside the United States were incorporated in subsec. (a).

Subsecs. (c), (d). Pub. L. 91–258 added subsec. (c), redesignated former subsec. (c) as (d), and substituted “section 4263(a)” for “section 4264”.

Subsec. (e). Pub. L. 91–258 added subsec. (e).

1965—Pub. L. 89–44 substituted “November 15, 1962” for “November 15, 1962, and before July 1, 1965” wherever appearing.

1964—Pub. L. 88–348 substituted “July 1, 1965” for “July 1, 1964” wherever appearing.

1963—Pub. L. 88–52 substituted “July 1, 1964” for “July 1, 1963” wherever appearing.

1962—Subsecs. (a), (b). Pub. L. 87–508, § 5(b), struck out imposition of tax on transportation of persons by rail, motor vehicle, or water and substituted “tax equal to 5 percent of the amount so paid in connection with transportation which begins after November 15, 1962, and before July 1, 1963” for “tax equal to 10 percent of the amount so paid for transportation which begins before November 16, 1962”.

Pub. L. 87–508, § 5(a), substituted provisions imposing a tax equal to 10 percent of the amount paid for transportation which begins before Nov. 16, 1962, for provisions imposing a tax equal to 10 percent of the amount paid before July 1, 1962, or 5 percent of the amount paid on or after July 1, 1962.

Subsec. (c). Pub. L. 87–508, § 5(b), substituted “tax equivalent to 5 percent of the amount so paid in connection with transportation which begins after November 15, 1962, and before July 1, 1963” for “tax equivalent to 10 percent of the amount so paid in connection with transportation which begins before November 16, 1962”.

Pub. L. 87–508, § 5(a), substituted provision imposing a tax equivalent to 10 percent of the amount paid in connection with transportation which begins before Nov. 16, 1962 for provision imposing a tax equivalent to 10 percent of the amount paid before July 1, 1962, or 5 percent of the amount paid on or after July 1, 1962.

1961—Pub. L. 87–72 substituted “July 1, 1962” for “July 1, 1961”, wherever appearing.

1960—Pub. L. 86–564 substituted “July 1, 1961” for “July 1, 1960” wherever appearing.

1959—Pub. L. 86–75 reduced tax on transportation of persons from ten to five percent effective July 1, 1960.

1956—Subsec. (a). Act July 25, 1956, § 1, substituted “taxable transportation (as defined in section 4262) of any person by rail, motor vehicle, water, or air a tax” for “the transportation of persons by rail, motor vehicle, water, or air within or without the United States a tax”.

Subsec. (b). Act July 25, 1956, § 1, substituted “taxable transportation (as defined in section 4262) of any person by rail, motor vehicle, water, or air, but only if such transportation begins and ends in the United States” for “transportation of persons by rail, motor vehicle, water, or air which begins and ends in the United States”.

Subsec. (d). Act July 25, 1956, § 4(b), substituted “Except as provided in section 4264, the” for “The”.

Amendment by section 11002(d)(1)(FF) of Pub. L. 115–97 applicable to taxable years beginning after Dec. 31, 2017, see section 11002(e) of Pub. L. 115–97, set out as a note under section 1 of this title.

Pub. L. 115–97, title I, § 13822(b), Dec. 22, 2017, 131 Stat. 2183, provided that: “The amendment made by this section [amending this section] shall apply to amounts paid after the date of the enactment of this Act [Dec. 22, 2017].”

Amendment by Pub. L. 113–295 effective Dec. 19, 2014, subject to a savings provision, see section 221(b) of Pub. L. 113–295, set out as a note under section 1 of this title.

Amendment by section 1101(b)(1) of Pub. L. 112–95 effective Feb. 18, 2012, see section 1101(c) of Pub. L. 112–95, set out as an Effective and Termination Dates of 2012 Amendment note under section 4081 of this title.

Pub. L. 112–95, title XI, § 1103(d)(3), Feb. 14, 2012, 126 Stat. 151, provided that: “The amendments made by subsection (c) [amending this section] shall apply to taxable transportation provided after March 31, 2012.”

Amendment by Pub. L. 112–91 effective Feb. 1, 2012, see section 2(c) of Pub. L. 112–91, set out as an Effective and Termination Dates of 2012 Amendment note under section 4081 of this title.

Amendment by Pub. L. 112–30 effective Sept. 17, 2011, see section 202(c) of Pub. L. 112–30, set out as a note under section 4081 of this title.

Amendment by Pub. L. 112–27 effective July 23, 2011, see section 2(c) of Pub. L. 112–27, set out as a note under section 4081 of this title.

Amendment by Pub. L. 112–21 effective July 1, 2011, see section 2(c) of Pub. L. 112–21, set out as a note under section 4081 of this title.

Amendment by Pub. L. 112–16 effective June 1, 2011, see section 2(c) of Pub. L. 112–16, set out as a note under section 4081 of this title.

Amendment by Pub. L. 112–7 effective Apr. 1, 2011, see section 2(c) of Pub. L. 112–7, set out as a note under section 4081 of this title.

Amendment by Pub. L. 111–329 effective Jan. 1, 2011, see section 2(c) of Pub. L. 111–329, set out as a note under section 4081 of this title.

Amendment by Pub. L. 111–249 effective Oct. 1, 2010, see section 2(c) of Pub. L. 111–249, set out as a note under section 4081 of this title.

Amendment by Pub. L. 111–216 effective Aug. 2, 2010, see section 101(c) of Pub. L. 111–216, set out as a note under section 4081 of this title.

Amendment by Pub. L. 111–197 effective July 4, 2010, see section 2(c) of Pub. L. 111–197, set out as a note under section 4081 of this title.

Amendment by Pub. L. 111–161 effective May 1, 2010, see section 2(c) of Pub. L. 111–161, set out as a note under section 4081 of this title.

Amendment by Pub. L. 111–153 effective Apr. 1, 2010, see section 2(c) of Pub. L. 111–153, set out as a note under section 4081 of this title.

Amendment by Pub. L. 111–116 effective Jan. 1, 2010, see section 2(c) of Pub. L. 111–116, set out as a note under section 4081 of this title.

Amendment by Pub. L. 111–69 effective Oct. 1, 2009, see section 2(c) of Pub. L. 111–69, set out as a note under section 4081 of this title.

Amendment by Pub. L. 111–12 effective Apr. 1, 2009, see section 2(c) of Pub. L. 111–12, set out as a note under section 4081 of this title.

Amendment by Pub. L. 110–330 effective Oct. 1, 2008, see section 2(c) of Pub. L. 110–330, set out as a note under section 4081 of this title.

Amendment by Pub. L. 110–253 effective July 1, 2008, see section 2(c) of Pub. L. 110–253, set out as a note under section 4081 of this title.

Amendment by Pub. L. 110–190 effective Mar. 1, 2008, see section 2(c) of Pub. L. 110–190, set out as a note under section 4081 of this title.

Amendment by Pub. L. 110–161 effective Oct. 1, 2007, see section 116(d) of div. K of Pub. L. 110–161, set out as a note under section 4081 of this title.

Pub. L. 109–59, title XI, § 11121(d), Aug. 10, 2005, 119 Stat. 1952, provided that: “The amendments made by this section [amending this section and section 6420 of this title] shall apply to fuel use or air transportation after September 30, 2005.”

Pub. L. 109–59, title XI, § 11122(b), Aug. 10, 2005, 119 Stat. 1952, provided that: “The amendments made by this section [amending this section] shall take effect on October 1, 2005.”

Amendment by section 11123(a) of Pub. L. 109–59 applicable to transportation beginning after Sept. 30, 2005, see section 11123(c) of Pub. L. 109–59, set out as a note under section 4083 of this title.

Pub. L. 108–176, title IX, § 902(b), Dec. 12, 2003, 117 Stat. 2598, provided that: “The amendment made by subsection (a) [amending this section] shall take effect as if included in the provisions of the Taxpayer Relief Act of 1997 [Pub. L. 105–34] to which they relate.”

Pub. L. 105–34, title X, § 1031(e)(2), Aug. 5, 1997, 111 Stat. 932, provided that:

Pub. L. 105–34, title XIV, § 1435(c)(1), Aug. 5, 1997, 111 Stat. 1053, provided that: “The amendment made by subsection (a) [amending this section] shall apply to amounts paid after September 30, 1997.”

Amendment by section 1601(f)(4)(D) of Pub. L. 105–34 effective as if included in the provisions of the Small Business Job Protection Act of 1996, Pub. L. 104–188, to which it relates, see section 1601(j) of Pub. L. 105–34, set out as a note under section 23 of this title.

Pub. L. 105–2, § 2(e)(2), Feb. 28, 1997, 111 Stat. 7, provided that:

Amendment by Pub. L. 104–188 effective on 7th calendar day after Aug. 20, 1996, but not applicable to any amount paid before such date, see section 1609(i) of Pub. L. 104–188, set out as a note under section 4041 of this title.

Pub. L. 101–508, title XI, § 11213(a)(3), Nov. 5, 1990, 104 Stat. 1388–432, provided that: “The amendments made by this subsection [amending this section and section 4271 of this title] shall apply to transportation beginning after November 30, 1990, but shall not apply to amounts paid on or before such date.”

Pub. L. 101–239, title VII, § 7503(b), Dec. 19, 1989, 103 Stat. 2362, provided that: “The amendment made by subsection (a) [amending this section] shall apply with respect to transportation beginning after December 31, 1989, which was not paid for before such date.”

Pub. L. 100–223, title IV, § 404(d)(1), Dec. 30, 1987, 101 Stat. 1533, provided that: “The amendment made by subsection (a) [amending this section] shall apply to transportation beginning after September 30, 1988, but shall not apply to amounts paid on or before such date.”

Amendment by Pub. L. 99–514 effective, except as otherwise provided, as if included in the provisions of the Tax Reform Act of 1984, Pub. L. 98–369, div. A, to which such amendment relates, see section 1881 of Pub. L. 99–514, set out as a note under section 48 of this title.

Pub. L. 98–369, div. A, title X, § 1018(c)(2), July 18, 1984, 98 Stat. 1022, provided that: “The amendment made by subsection (b) [amending this section] shall apply to transportation beginning after March 31, 1984, but shall not apply to any amount paid on or before such date.”

Pub. L. 97–248, title II, § 280(d), Sept. 3, 1982, 96 Stat. 565, provided that: “The amendments made by this section [amending this section and sections 4271, 4281, and 6156 of this title and repealing sections 4491 to 4494 and 6426 of this title] shall apply with respect to transportation beginning after August 31, 1982; except that such amendments shall not apply to any amount paid on or before such date.”

Amendment by Pub. L. 94–455 effective on first day of first month which begins more than 90 days after Oct. 4, 1976, see section 1904(d) of Pub. L. 94–455, set out as a note under section 4041 of this title.

Amendment by Pub. L. 91–258 applicable to transportation beginning after June 30, 1970, see section 211(b) of Pub. L. 91–258, set out as a note under section 4041 of this title.

Pub. L. 89–44, title VII, § 701(b)(3), June 21, 1965, 79 Stat. 157, provided that: “The amendments made by section 303 [amending this section] shall apply with respect to amounts paid for transportation, and amounts paid for accommodations in connection with transportation, beginning on or after July 1, 1965.”

Pub. L. 87–508, § 5(b), June 28, 1962, 76 Stat. 115, provided that the amendment made by that section is effective with respect to transportation beginning after Nov. 15, 1962.

Act July 25, 1956, ch. 725, § 6, 70 Stat. 646, provided that: “The amendments made by this Act [amending this section and sections 4262 to 4264, 4291, and 6421 of this title] shall apply to amounts paid on or after the first day of the first month which begins more than sixty days after the date of the enactment of this Act [July 25, 1956] for transportation commencing on or after such first day.”

For provisions that nothing in amendment by section 401(b)(42) of Pub. L. 115–141 be construed to affect treatment of certain transactions occurring, property acquired, or items of income, loss, deduction, or credit taken into account prior to Mar. 23, 2018, for purposes of determining liability for tax for periods ending after Mar. 23, 2018, see section 401(e) of Pub. L. 115–141, set out as a note under section 23 of this title.

Due date for deposits of taxes imposed by this section which would be required to be made after Aug. 14, 1997, and before Oct. 1, 1997, to be Oct. 10, 1997, and due date for deposits of taxes imposed by this section which would be required to be made after Aug. 14, 1998, and before Oct. 1, 1998, to be Oct. 5, 1998, see section 1031(g) of Pub. L. 105–34, set out as a note under section 6302 of this title.

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.

Provisions relating to inflation adjustment of items in this section for certain years were contained in the following:

2011—Internal Revenue News Release IR 2010–129, Dec. 29, 2010.

2010—Internal Revenue News Release IR 2009–120, Dec. 23, 2009.