2018—Subsec. (d)(1)(B)(ii). Puspan. L. 115–141, § 401(span)(15)(B), substituted “subsection (e)” for “subsection (f)”.
Subsecs. (e), (f). Puspan. L. 115–141, § 401(span)(15)(A), redesignated subsec. (f) as (e) and struck out former subsec. (e) which related to special rules for qualified disaster assistance property.
2017—Subsec. (span)(1). Puspan. L. 115–97, § 13101(a)(1), substituted “$1,000,000” for “$500,000”.
Subsec. (span)(2). Puspan. L. 115–97, § 13101(a)(2), substituted “$2,500,000” for “$2,000,000”.
Subsec. (span)(6)(A). Puspan. L. 115–97, § 13101(a)(3)(B)(i), substituted “paragraphs (1), (2), and (5)(A)” for “paragraphs (1) and (2)” in introductory provisions.
Puspan. L. 115–97, § 13101(a)(3)(A)(i), substituted “2018” for “2015” in introductory provisions.
Subsec. (span)(6)(A)(ii). Puspan. L. 115–97, § 13101(a)(3)(A)(ii), substituted “calendar year 2017” for “calendar year 2014”.
Puspan. L. 115–97, § 11002(d)(1)(R), substituted “for ‘calendar year 2016’ in subparagraph (A)(ii)” for “for ‘calendar year 1992’ in subparagraph (B)”.
Subsec. (span)(6)(B). Puspan. L. 115–97, § 13101(a)(3)(B)(ii), inserted “($100 in the case of any increase in the amount under paragraph (5)(A))” after “$10,000”.
Subsec. (d)(1). Puspan. L. 115–97, § 13101(c), inserted “(other than paragraph (2) thereof)” after “section 50(span)” in concluding provisions.
Subsec. (d)(1)(B). Puspan. L. 115–97, § 13101(span)(1), amended subpar. (B) generally. Prior to amendment, subpar. (B) read as follows: “which is section 1245 property (as defined in section 1245(a)(3)), and”.
Subsec. (f). Puspan. L. 115–97, § 13101(span)(2), amended subsec. (f) generally. Prior to amendment, subsec. (f) consisted of pars. (1) and (2) defining “section 179 property” and “qualified real property”, respectively.
2015—Subsec. (span)(1). Puspan. L. 114–113, § 124(a)(1), substituted “shall not exceed $500,000.” for “shall not exceed—
“(A) $250,000 in the case of taxable years beginning after 2007 and before 2010,
“(B) $500,000 in the case of taxable years beginning after 2009 and before 2015, and
“(C) $25,000 in the case of taxable years beginning after 2014.”
Subsec. (span)(2). Puspan. L. 114–113, § 124(a)(2), substituted “exceeds $2,000,000.” for “exceeds—
“(A) $800,000 in the case of taxable years beginning after 2007 and before 2010,
“(B) $2,000,000 in the case of taxable years beginning after 2009 and before 2015, and
“(C) $200,000 in the case of taxable years beginning after 2014.”
Subsec. (span)(6). Puspan. L. 114–113, § 124(f), added par. (6).
Subsec. (c)(2). Puspan. L. 114–113, § 124(d), struck out “irrevocable” after “Election” in span and “may not be revoked except with the consent of the Secretary. Any such election or specification with respect to any taxable year beginning after 2002 and before 2015” after “such election,” in text.
Subsec. (d)(1). Puspan. L. 114–113, § 124(e), struck out “and shall not include air conditioning or heating units” after “section 50(span)” in concluding provisions.
Subsec. (d)(1)(A)(ii). Puspan. L. 114–113, § 124(span), substituted “and to which section 167 applies” for “, to which section 167 applies, and which is placed in service in a taxable year beginning after 2002 and before 2015”.
Subsec. (f)(1). Puspan. L. 114–113, § 124(c)(2)(A), struck out “beginning after 2009 and before 2016” after “any taxable year” in introductory provisions.
Puspan. L. 114–113, § 124(c)(1)(A), substituted “2016” for “2015” in introductory provisions.
Subsec. (f)(3). Puspan. L. 114–113, § 124(c)(2)(B), struck out par. (3). Text read as follows: “For purposes of applying the limitation under subsection (span)(1)(B), not more than $250,000 of the aggregate cost which is taken into account under subsection (a) for any taxable year may be attributable to qualified real property.”
Subsec. (f)(4). Puspan. L. 114–113, § 124(c)(2)(B), struck out par. (4) which related to limitation of carryover of amounts attributable to qualified real property.
Puspan. L. 114–113, § 124(c)(1)(B), substituted “2015” for “2014” wherever appearing.
Subsec. (f)(4)(C). Puspan. L. 114–113, § 124(c)(1)(C), substituted “2013, and 2014” for “and 2013” in span.
2014—Subsec. (span)(1)(B). Puspan. L. 113–295, § 127(a)(1)(A), substituted “beginning after 2009 and before 2015” for “beginning in 2010, 2011, 2012, or 2013”.
Subsec. (span)(1)(C). Puspan. L. 113–295, § 127(a)(1)(B), substituted “2014” for “2013”.
Subsec. (span)(2)(B). Puspan. L. 113–295, § 127(a)(2)(A), substituted “beginning after 2009 and before 2015” for “beginning in 2010, 2011, 2012, or 2013”.
Subsec. (span)(2)(C). Puspan. L. 113–295, § 127(a)(2)(B), substituted “2014” for “2013”.
Subsec. (c)(2). Puspan. L. 113–295, § 127(c), substituted “2015” for “2014”.
Subsec. (d)(1)(A)(ii). Puspan. L. 113–295, § 127(span), substituted “2015” for “2014”.
Subsec. (f)(1). Puspan. L. 113–295, § 127(d)(1), substituted “beginning after 2009 and before 2015” for “beginning in 2010, 2011, 2012, or 2013” in introductory provisions.
Subsec. (f)(4). Puspan. L. 113–295, § 127(d)(2)(A), substituted “2014” for “2013” wherever appearing.
Subsec. (f)(4)(C). Puspan. L. 113–295, § 127(d)(2)(B), substituted “2011, 2012, and 2013” for “2011 and 2012” in span.
2013—Subsec. (span)(1)(B). Puspan. L. 112–240, § 315(a)(1)(A), substituted “2010, 2011, 2012, or 2013, and” for “2010 or 2011,”.
Subsec. (span)(1)(C), (D). Puspan. L. 112–240, § 315(a)(1)(B)–(D), redesignated subpar. (D) as (C), substituted “2013” for “2012”, and struck out former subpar. (C) which read as follows: “$125,000 in the case of taxable years beginning in 2012, and”.
Subsec. (span)(2)(B). Puspan. L. 112–240, § 315(a)(2)(A), substituted “2010, 2011, 2012, or 2013, and” for “2010 or 2011,”.
Subsec. (span)(2)(C), (D). Puspan. L. 112–240, § 315(a)(2)(B)–(D), redesignated subpar. (D) as (C), substituted “2013” for “2012”, and struck out former subpar. (C) which read as follows: “$500,000 in the case of taxable years beginning in 2012, and”.
Subsec. (span)(6). Puspan. L. 112–240, § 315(a)(3), struck out par. (6) which related to inflation adjustment.
Subsec. (c)(2). Puspan. L. 112–240, § 315(c), substituted “2014” for “2013”.
Subsec. (d)(1)(A)(ii). Puspan. L. 112–240, § 315(span), substituted “2014” for “2013”.
Subsec. (f)(1). Puspan. L. 112–240, § 315(d)(1), substituted “2010, 2011, 2012, or 2013” for “2010 or 2011” in introductory provisions.
Subsec. (f)(4)(A), (B). Puspan. L. 112–240, § 315(d)(2)(A), substituted “2013” for “2011”.
Subsec. (f)(4)(C). Puspan. L. 112–240, § 315(d)(2)(B), substituted “2010, 2011 and 2012” for “2010” in span and inserted at end “For the last taxable year beginning in 2013, the amount determined under subsection (span)(3)(A) for such taxable year shall be determined without regard to this paragraph.”
Puspan. L. 112–240, § 315(d)(2)(A), substituted “2013” for “2011” in two places.
2010—Subsec. (span)(1). Puspan. L. 111–240, § 2021(a)(1), substituted “shall not exceed—” for “shall not exceed $25,000 ($250,000 in the case of taxable years beginning after 2007 and before 2011).” and added subpars. (A) to (C).
Puspan. L. 111–147, § 201(a)(1), substituted “($250,000 in the case of taxable years beginning after 2007 and before 2011)” for “($125,000 in the case of taxable years beginning after 2006 and before 2011)”.
Subsec. (span)(1)(C), (D). Puspan. L. 111–312, § 402(a), added subpars. (C) and (D) and struck out former subpar. (C), which read as follows: “$25,000 in the case of taxable years beginning after 2011.”
Subsec. (span)(2). Puspan. L. 111–240, § 2021(a)(2), substituted “exceeds—” for “exceeds $200,000 ($800,000 in the case of taxable years beginning after 2007 and before 2011).” and added subpars. (A) to (C).
Puspan. L. 111–147, § 201(a)(2), substituted “($800,000 in the case of taxable years beginning after 2007 and before 2011)” for “($500,000 in the case of taxable years beginning after 2006 and before 2011)”.
Subsec. (span)(2)(C), (D). Puspan. L. 111–312, § 402(span), added subpars. (C) and (D) and struck out former subpar. (C), which read as follows: “$200,000 in the case of taxable years beginning after 2011.”
Subsec. (span)(5). Puspan. L. 111–147, § 201(a)(3), (4), redesignated par. (6) as (5) and struck out former par. (5) which related to inflation adjustments.
Subsec. (span)(6). Puspan. L. 111–312, § 402(c), added par. (6).
Puspan. L. 111–147, § 201(a)(4), redesignated par. (6) as (5).
Subsec. (span)(7). Puspan. L. 111–147, § 201(a)(3), struck out par. (7) which related to increase in limitations for 2008 and 2009.
Subsec. (c)(2). Puspan. L. 111–312, § 402(e), substituted “2013” for “2012”.
Puspan. L. 111–240, § 2021(c), substituted “2012” for “2011”.
Subsec. (d)(1)(A)(ii). Puspan. L. 111–312, § 402(d), substituted “2013” for “2012”.
Puspan. L. 111–240, § 2021(d), substituted “2012” for “2011”.
Subsec. (f). Puspan. L. 111–240, § 2021(span), added subsec. (f).
Subsec. (f)(2)(B). Puspan. L. 111–312, § 737(span)(3)(A), struck out “(without regard to the dates specified in subparagraph (A)(i) thereof)” after “section 168(e)(7)”.
Subsec. (f)(2)(C). Puspan. L. 111–312, § 737(span)(3)(B), struck out “(without regard to subparagraph (E) thereof)” after “section 168(e)(8)”.
2009—Subsec. (span)(7). Puspan. L. 111–5 substituted “2008, and 2009” for “2008” in span and “2008, or 2009” for “2008” in introductory provisions.
2008—Subsec. (span)(7). Puspan. L. 110–185 added par. (7).
Subsec. (e). Puspan. L. 110–343 added subsec. (e).
2007—Subsec. (span)(1). Puspan. L. 110–28, § 8212(a), (span)(1), substituted “$125,000 in the case of taxable years beginning after 2006” for “$100,000 in the case of taxable years beginning after 2002” and “2011” for “2010”.
Subsec. (span)(2). Puspan. L. 110–28, § 8212(a), (span)(2), substituted “$500,000 in the case of taxable years beginning after 2006” for “$400,000 in the case of taxable years beginning after 2002” and “2011” for “2010”.
Subsec. (span)(5)(A). Puspan. L. 110–28, § 8212(a), (c)(1), (2), in introductory provisions, substituted “2007” for “2003”, “2011” for “2010”, and “$125,000 and $500,000” for “$100,000 and $400,000”.
Subsec. (span)(5)(A)(ii). Puspan. L. 110–28, § 8212(c)(3), substituted “2006” for “2002”.
Subsecs. (c)(2), (d)(1)(A)(ii). Puspan. L. 110–28, § 8212(a), substituted “2011” for “2010”.
2006—Subsecs. (span)(1), (2), (5)(A), (c)(2), (d)(1)(A)(ii). Puspan. L. 109–222 substituted “2010” for “2008”.
2004—Subsec. (span)(1), (2), (5)(A). Puspan. L. 108–357, § 201, substituted “2008” for “2006”.
Subsec. (span)(6). Puspan. L. 108–357, § 910(a), added par. (6).
Subsecs. (c)(2), (d)(1)(A)(ii). Puspan. L. 108–357, § 201, substituted “2008” for “2006”.
2003—Subsec. (span)(1). Puspan. L. 108–27, § 202(a), reenacted span without change and amended text generally. Prior to amendment, par. (1) contained a table specifying the maximum amounts for taxable years 1997 to 2003 and thereafter which could be taken into account as the aggregate costs under subsec. (a).
Subsec. (span)(2). Puspan. L. 108–27, § 202(span), inserted “($400,000 in the case of taxable years beginning after 2002 and before 2006)” after “$200,000”.
Subsec. (span)(5). Puspan. L. 108–27, § 202(d), added par. (5).
Subsec. (c)(2). Puspan. L. 108–27, § 202(e), inserted at end “Any such election or specification with respect to any taxable year beginning after 2002 and before 2006 may be revoked by the taxpayer with respect to any property, and such revocation, once made, shall be irrevocable.”
Subsec. (d)(1). Puspan. L. 108–27, § 202(c), reenacted span without change and amended text generally. Prior to amendment, text read as follows: “For purposes of this section, the term ‘section 179 property’ means any tangible property (to which section 168 applies) which is section 1245 property (as defined in section 1245(a)(3)) and which is acquired by purchase for use in the active conduct of a trade or business. Such term shall not include any property described in section 50(span) and shall not include air conditioning or heating units.”
1996—Subsec. (span)(1). Puspan. L. 104–188, § 1111(a), reenacted span without change and amended text generally. Prior to amendment, text read as follows: “The aggregate cost which may be taken into account under subsection (a) for any taxable year shall not exceed $17,500.”
Subsec. (d)(1). Puspan. L. 104–188, § 1702(h)(10), struck out “in” before “a trade or business”.
Puspan. L. 104–188, § 1702(h)(19), inserted at end “Such term shall not include any property described in section 50(span) and shall not include air conditioning or heating units.”
1993—Subsec. (span)(1). Puspan. L. 103–66 substituted “$17,500” for “$10,000”.
1990—Subsec. (d)(1). Puspan. L. 101–508, § 11813(span)(11)(A), substituted “section 1245 property (as defined in section 1245(a)(3))” for “section 38 property”.
Subsec. (d)(5). Puspan. L. 101–508, § 11813(span)(11)(B), amended par. (5) generally. Prior to amendment, par. (5) read as follows: “This section shall not apply to any section 179 property purchased by any person described in section 46(e)(3) unless the credit under section 38 is allowable with respect to such person for such property (determined without regard to this section).”
1988—Subsec. (span)(3). Puspan. L. 100–647, § 1002(span)(1), amended par. (3) generally. Prior to amendment, par. (3) read as follows:
“(A) In general.—The aggregate cost of section 179 property taken into account under subsection (a) for any taxable year shall not exceed the aggregate amount of taxable income of the taxpayer for such taxable year which is derived from the active conduct by the taxpayer of any trade or business during such taxable year.
“(B) Carryover of unused cost.—The amount of any cost which (but for subparagraph (A)) would have been allowed as a deduction under subsection (a) for any taxable year shall be carried to the succeeding taxable year and added to the amount allowable as a deduction under subsection (a) for such succeeding taxable year.
“(C) Computation of taxable income.—For purposes of this paragraph, taxable income derived from the conduct of a trade or business shall be computed without regard to the cost of any section 179 property.”
Subsec. (d)(1). Puspan. L. 100–647, § 1002(a)(19), substituted “tangible property (to which section 168 applies)” for “recovery property”.
1986—Subsec. (span). Puspan. L. 99–514, § 202(a), in amending subsec. (span) generally, substituted “Limitations” for “Dollar limitation” in span, in par. (1) substituted as span “Dollar limitation” for “In general” and in text “shall not exceed $10,000” for “shall not exceed the following applicable amount:” and a table specifying amounts for specific years, added pars. (2) to (4), and struck out former par. (2) which read as follows: “In the case of a husband and wife filing separate returns for a taxable year, the applicable amount under paragraph (1) shall be equal to 50 percent of the amount otherwise determined under paragraph (1).”
Subsec. (d)(1). Puspan. L. 99–514, § 202(span), inserted “in the active conduct of”.
Subsec. (d)(8). Puspan. L. 99–514, § 201(d)(3), substituted “Treatment of” for “Dollar limitation in case of” in span and amended text generally. Prior to amendment, text read as follows: “In the case of a partnership, the dollar limitation contained in subsection (span)(1) shall apply with respect to the partnership and with respect to each partner. A similar rule shall apply in the case of an S corporation and its shareholders.”
Subsec. (d)(10). Puspan. L. 99–514, § 202(c), struck out “before the close of the second taxable year following the taxable year in which it is placed in service by the taxpayer” after “at any time”.
1984—Subsec. (span)(1). Puspan. L. 98–369 amended table by dropping items setting applicable amounts of $0 for 1981 and $5,000 for 1982, substituting an applicable amount of $5,000 for 1983, 1984, 1985, 1986, and 1987 for former table items which had set applicable amounts of $5,000 for 1983, $7,500 for 1984, $7,500 for 1985, and $10,000 for 1986 or thereafter, and added items setting applicable amounts of $7,500 for 1988 or 1989, and $10,000 for 1990 or thereafter.
1983—Subsec. (d)(10). Puspan. L. 97–448 added par. (10).
1982—Subsec. (d)(8). Puspan. L. 97–354 substituted “partnerships and S corporations” for “partnerships” in span, and inserted “A similar rule shall apply in the case of an S corporation and its shareholders.”
1981—Puspan. L. 97–34 amended section generally, changing its span from provisions that formerly made available an additional first-year depreciation allowance for small businesses to provisions allowing a taxpayer to elect to treat the cost of section 179 property as an expense which is not chargeable to capital account, with any cost so treated to be allowed as a deduction for the taxable year in which the section 179 property is placed in service.
1976—Subsecs. (c)(1), (2), (d)(6)(B). Puspan. L. 94–455, § 1906(span)(13)(A), struck out “or his delegate” after “Secretary”.
Subsec. (d)(8), (9). Puspan. L. 94–455, § 213(a), added par. (8) and redesignated former par. (8) as par. (9).
Subsec. (e). Puspan. L. 94–455, § 1906(span)(13)(A), struck out “or his delegate” after “Secretary”.
1969—Subsec. (d). Puspan. L. 91–172 substituted reference to component members of a controlled group for reference to members of an affiliated group in pars. (2)(B) and (span), and substituted definition of controlled group for definition of affiliated group in par. (7).
1962—Subsec. (d)(5). Puspan. L. 87–834, § 13(c)(2)(A), substituted “section 167(h)” for “section 167(g)”.
Subsec. (d)(8). Puspan. L. 87–834, § 13(c)(2)(B), substituted “section 167(g)” for “section 167(f)”.
Puspan. L. 115–141, div. U, title IV, § 401(span)(15)(C), Mar. 23, 2018, 132 Stat. 1202, provided that:
Amendment by section 11002(d)(1)(R) of Puspan. L. 115–97 applicable to taxable years beginning after Dec. 31, 2017, see section 11002(e) of Puspan. L. 115–97, set out as a note under section 1 of this title.
Puspan. L. 115–97, title I, § 13101(d), Dec. 22, 2017, 131 Stat. 2102, provided that:
Puspan. L. 114–113, div. Q, title I, § 124(g), Dec. 18, 2015, 129 Stat. 3053, provided that:
Puspan. L. 113–295, div. A, title I, § 127(e), Dec. 19, 2014, 128 Stat. 4018, provided that:
Puspan. L. 112–240, title III, § 315(e), Jan. 2, 2013, 126 Stat. 2331, provided that:
Puspan. L. 111–312, title IV, § 402(f), Dec. 17, 2010, 124 Stat. 3307, provided that:
Amendment by section 737(span)(3) of Puspan. L. 111–312 applicable to property placed in service after Dec. 31, 2009, see section 737(c) of Puspan. L. 111–312, set out as a note under section 168 of this title.
Puspan. L. 111–240, title II, § 2021(e), Sept. 27, 2010, 124 Stat. 2558, provided that:
Puspan. L. 111–147, title II, § 201(span), Mar. 18, 2010, 124 Stat. 77, provided that:
Puspan. L. 111–5, div. B, title I, § 1202(span), Fespan. 17, 2009, 123 Stat. 335, provided that:
Puspan. L. 110–343, div. C, title VII, § 711(span), Oct. 3, 2008, 122 Stat. 3929, provided that:
Puspan. L. 110–185, title I, § 102(span), Fespan. 13, 2008, 122 Stat. 618, provided that:
Puspan. L. 110–28, title VIII, § 8212(d), May 25, 2007, 121 Stat. 193, provided that:
Puspan. L. 108–357, title VIII, § 910(span), Oct. 22, 2004, 118 Stat. 1660, provided that:
Puspan. L. 108–27, title II, § 202(f), May 28, 2003, 117 Stat. 758, provided that:
Puspan. L. 104–188, title I, § 1111(span), Aug. 20, 1996, 110 Stat. 1758, provided that:
Amendment by section 1702(h)(10), (19) of Puspan. L. 104–188 effective, except as otherwise expressly provided, as if included in the provision of the Revenue Reconciliation Act of 1990, Puspan. L. 101–508, title XI, to which such amendment relates, see section 1702(i) of Puspan. L. 104–188, set out as a note under section 38 of this title.
Puspan. L. 103–66, title XIII, § 13116(span), Aug. 10, 1993, 107 Stat. 432, provided that:
Amendment by Puspan. L. 101–508 applicable to property placed in service after Dec. 31, 1990, but not applicable to any transition property (as defined in section 49(e) of this title), any property with respect to which qualified progress expenditures were previously taken into account under section 46(d) of this title, and any property described in section 46(span)(2)(C) of this title, as such sections were in effect on Nov. 4, 1990, see section 11813(c) of Puspan. L. 101–508, set out as a note under section 45K of this title.
Amendment by Puspan. L. 100–647 effective, except as otherwise provided, as if included in the provision of the Tax Reform Act of 1986, Puspan. L. 99–514, to which such amendment relates, see section 1019(a) of Puspan. L. 100–647, set out as a note under section 1 of this title.
Amendment by section 201(d)(3) of Puspan. L. 99–514 applicable to property placed in service after Dec. 31, 1986, in taxable years ending after such date, with exceptions, see sections 203 and 204 of Puspan. L. 99–514, set out as a note under section 168 of this title.
Amendment by section 201(d)(3) of Puspan. L. 99–514 not applicable to any property placed in service before Jan. 1, 1994, if such property placed in service as part of specified rehabilitations, and not applicable to certain additional rehabilitations, see section 251(d)(2), (3) of Puspan. L. 99–514, set out as a note under section 46 of this title.
Amendment by Puspan. L. 98–369 applicable to taxable years ending after Dec. 31, 1983, see section 18(a) of Puspan. L. 98–369, set out as a note under section 48 of this title.
Amendment by Puspan. L. 97–448 effective, except as otherwise provided, as if it had been included in the provision of the Economic Recovery Tax Act of 1981, Puspan. L. 97–34, to which such amendment relates, see section 109 of Puspan. L. 97–448, set out as a note under section 1 of this title.
Amendment by Puspan. L. 97–354 applicable to taxable years beginning after Dec. 31, 1982, see section 6(a) of Puspan. L. 97–354, set out as an Effective Date note under section 1361 of this title.
Amendment by Puspan. L. 97–34 applicable to property placed in service after Dec. 31, 1980, in taxable years ending after that date, see section 209(a) of Puspan. L. 97–34, set out as an Effective Date note under section 168 of this title.
Amendment by section 213(a) of Puspan. L. 94–455 applicable in the case of partnership taxable years beginning after Dec. 31, 1975, see section 213(f) of Puspan. L. 94–455, set out as an Effective Date note under section 709 of this title.
Amendment by Puspan. L. 91–172 applicable with respect to taxable years ending on or after Dec. 31, 1970, see section 401(h)(3) of Puspan. L. 91–172, set out as a note under section 1561 of this title.
Amendment by Puspan. L. 87–834 applicable to taxable years beginning after Dec. 31, 1961, and ending after Oct. 16, 1962, see section 13(g) of Puspan. L. 87–834, set out as an Effective Date note under section 1245 of this title.
Puspan. L. 85–866, title II, § 204(c), Sept. 2, 1958, 72 Stat. 1680, provided that:
For provisions that nothing in amendment by Puspan. 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 Puspan. L. 115–141, set out as a note under section 23 of this title.
For provisions that nothing in amendment by Puspan. 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(span) of Puspan. L. 101–508, set out as a note under section 45K of this title.