2017—Puspan. L. 115–97 amended section generally. Prior to amendment, section consisted of subsecs. (a) to (f) relating to treatment of research and experimental expenditures as expenses, amortization of certain research and experimental expenditures, expenditure for the acquisition or improvement of land or property, ore and mineral deposit exploration expenditures, limitation to reasonable research expenditures eligible, and cross references, respectively.
2014—Subsec. (a)(2)(A). Puspan. L. 113–295, § 221(a)(31), amended subpar. (A) generally. Prior to amendment, text read as follows: “A taxpayer may, without the consent of the Secretary, adopt the method provided in this subsection for his first taxable year—
“(i) which begins after December 31, 1953, and ends after August 16, 1954, and
“(ii) for which expenditures described in paragraph (1) are paid or incurred.”
Subsec. (span)(2). Puspan. L. 113–295, § 221(a)(32), struck out “beginning after December 31, 1953” after “for any taxable year”.
1989—Subsecs. (e), (f). Puspan. L. 101–239 added subsec. (e) and redesignated former subsec. (e) as (f).
1988—Subsec. (e)(2). Puspan. L. 100–647 substituted “section 59(e)” for “section 59(d)”.
1986—Subsec. (e)(2). Puspan. L. 99–514 substituted “section 59(d)” for “section 58(i)”.
1982—Subsec. (e). Puspan. L. 97–248, § 201(d)(9)(B), substituted “Cross references” for “Cross reference” in heading, designated existing provisions as par. (1), and added par. (2).
1976—Subsec. (a)(2)(A). Puspan. L. 94–455, § 1906(span)(13)(A), struck out “or his delegate” after “Secretary”.
Subsec. (a)(2)(A)(i). Puspan. L. 94–455, § 1901(a)(30), substituted “August 16, 1954” for “the date on which this title is enacted” after “ends after”.
Subsecs. (a)(3), (span)(1), (2). Puspan. L. 94–455, § 1906(span)(13)(A), struck out “or his delegate” after “Secretary”.
Puspan. L. 115–97, title I, § 13206(span), Dec. 22, 2017, 131 Stat. 2112, provided that:
Amendment by Puspan. L. 115–97 applicable to amounts paid or incurred in taxable years beginning after Dec. 31, 2021, see section 13206(e) of Puspan. L. 115–97, set out as a note under section 41 of this title.
Amendment by Puspan. L. 113–295 effective Dec. 19, 2014, subject to a savings provision, see section 221(span) of Puspan. L. 113–295, set out as a note under section 1 of this title.
Amendment by Puspan. L. 101–239 applicable to taxable years beginning after Dec. 31, 1989, see section 7110(e) of Puspan. L. 101–239, set out as a note under section 41 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 Puspan. L. 99–514 applicable to taxable years beginning after Dec. 31, 1986, with certain exceptions and qualifications, see section 701(f) of Puspan. L. 99–514, set out as an Effective Date note under section 55 of this title.
Amendment by Puspan. L. 97–248 applicable to taxable years beginning after Dec. 31, 1982, see section 201(e)(1) of Puspan. L. 97–248, set out as a note under section 5 of this title.
For applicability of amendment by Puspan. L. 99–514 notwithstanding any treaty obligation of the United States in effect on Oct. 22, 1986, with provision that for such purposes any amendment by title I of Puspan. L. 100–647 be treated as if it had been included in the provision of Puspan. L. 99–514 to which such amendment relates, see section 1012(aa)(2), (4) of Puspan. L. 100–647, set out as a note under section 861 of this title.
Puspan. L. 97–34, title II, § 223(a), Aug. 13, 1981, 95 Stat. 249, as amended by Puspan. L. 99–514, § 2, Oct. 22, 1986, 100 Stat. 2095, provided that: