The Endangered Species Act of 1973, referred to in subsec. (c)(1), (3)(A)(i), is Pub. L. 93–205, Dec. 28, 1973, 87 Stat. 884, which is classified principally to chapter 35 (§ 1531 et seq.) of Title 16, Conservation. For complete classification of this Act to the Code, see Short Title note set out under section 1531 of Title 16 and Tables.

Pub. L. 110–234 and Pub. L. 110–246 made identical amendments to this section. The amendments by Pub. L. 110–234 were repealed by section 4(a) of Pub. L. 110–246.

2014—Subsec. (d)(1). Pub. L. 113–295 amended par. (1) generally. Prior to amendment, text read as follows: “A taxpayer may, without the consent of the Secretary, adopt the method provided in this section for his first taxable year—

“(A) which begins after December 31, 1953, and ends after August 16, 1954, and

“(B) for which expenditures described in subsection (a) are paid or incurred.”

2008—Pub. L. 110–246, § 15303(a)(2)(B), inserted “; endangered species recovery expenditures” after “conservation expenditures” in section catchline.

Subsec. (a). Pub. L. 110–246, § 15303(a)(2)(A), inserted “, or for endangered species recovery” after “erosion of land used in farming”.

Subsec. (c)(1). Pub. L. 110–246, § 15303(a)(1), (2)(A), in introductory provisions, inserted “, or for endangered species recovery” after “erosion of land used in farming” and “Such term shall include expenditures paid or incurred for the purpose of achieving site-specific management actions recommended in recovery plans approved pursuant to the Endangered Species Act of 1973.” after first sentence.

Subsec. (c)(3)(A). Pub. L. 110–246, § 15303(b)(1), inserted “or endangered species recovery plan” after “conservation plan” in heading.

Subsec. (c)(3)(A)(i). Pub. L. 110–246, § 15303(b)(2), inserted “or the recovery plan approved pursuant to the Endangered Species Act of 1973” after “Department of Agriculture”.

1986—Subsec. (c)(3). Pub. L. 99–514 added par. (3).

1976—Subsec. (d)(1). Pub. L. 94–455, § 1906(b)(13)(A), struck out “or his delegate” after “Secretary”.

Subsec. (d)(1)(A). Pub. L. 94–455, § 1901(a)(30), substituted “August 16, 1954” for “the date on which this title is enacted” after “and ends after”.

Subsecs. (d)(2), (e). Pub. L. 94–455, § 1906(b)(13)(A), struck out “or his delegate” after “Secretary”.

1968—Subsec. (c)(1). Pub. L. 90–630, § 5(a), in text following subpar. (B), designated as cl. (i) existing provisions covering amounts which, if paid or incurred by the taxpayer, would without regard to the exception constitute deductible expenditures, and added cl. (ii).

Subsec. (f). Pub. L. 90–630, § 5(b), added subsec. (f).

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 of this section and repeal of Pub. L. 110–234 by Pub. L. 110–246 effective May 22, 2008, the date of enactment of Pub. L. 110–234, except as otherwise provided, see section 4 of Pub. L. 110–246, set out as an Effective Date note under section 8701 of Title 7, Agriculture.

Pub. L. 110–234, title XV, § 15303(c), May 22, 2008, 122 Stat. 1502, and Pub. L. 110–246, § 4(a), title XV, § 15303(c), June 18, 2008, 122 Stat. 1664, 2264, provided that: “The amendments made by this section [amending this section] shall apply to expenditures paid or incurred after December 31, 2008.”

[Pub. L. 110–234 and Pub. L. 110–246 enacted identical provisions. Pub. L. 110–234 was repealed by section 4(a) of Pub. L. 110–246, set out as a note under section 8701 of Title 7, Agriculture.]

Pub. L. 99–514, title IV, § 401(b), Oct. 22, 1986, 100 Stat. 2221, provided that: “The amendment made by this section [amending this section] shall apply to amounts paid or incurred after December 31, 1986, in taxable years ending after such date.”

Amendment by section 1901(a)(30) of Pub. L. 94–455 applicable with respect to taxable years beginning after Dec. 31, 1976, see section 1901(d) of Pub. L. 94–455, set out as a note under section 2 of this title.

Pub. L. 90–630, § 5(c), Oct. 22, 1968, 82 Stat. 1330, provided that: “The amendments made by subsections (a) and (b) [amending this section] shall apply to assessments levied after the date of the enactment of this Act [Oct. 22, 1968] in taxable years ending after such date.”