Subsection (q), referred to in subsecs. (b)(2), (d)(3), (e)(4), and (i)(10), probably should be a reference to subsec. (r). Prior to amendment by Pub. L. 117–167, those references were to subsec. (o) of this section, which related to authorization of appropriations and was redesignated as subsec. (r) by Pub. L. 117–167, § 10105(a)(6). See 2022 Amendment notes below.

The date of enactment of this section, referred to in subsecs. (i)(1) and (n)(1), probably means the date of enactment of Pub. L. 116—260, which enacted subsecs. (i) and (n) of this section and was approved Dec. 27, 2020.

The enactment of this section, referred to in subsecs. (i)(2) and (l), probably means the enactment of Pub. L. 116—260, which enacted subsecs. (i) and (l) of this section and made other amendments to this section.

Section is comprised of section 307 of Pub. L. 115–246. Subsec. (g) of section 307 of Pub. L. 115–246 amended section 2053 of this title.

2022—Subsec. (b). Pub. L. 117–167, § 10105(a)(1), designated existing provisions as par. (1), inserted heading, redesignated former pars. (1) and (2) as subpars. (A) and (B), respectively, of par. (1) and subpars. (A) and (B) of former par. (2) as cls. (i) and (ii), respectively, of subpar. (B) of par. (1), and added par. (2).

Subsec. (d)(3). Pub. L. 117–167, § 10105(a)(2), substituted “subsection (q)” for “subsection (o)”, “this subsection” for “subsection (d)”, and “2027” for “2025”.

Subsec. (e)(4). Pub. L. 117–167, § 10105(a)(3), substituted “subsection (q)” for “subsection (o)”, “this subsection” for “subsection (e)”, and “2027” for “2025”.

Subsec. (i)(10). Pub. L. 117–167, § 10105(a)(4)(A), substituted, in introductory provisions, “subsection (q)” for “subsection (o)” and “this subsection” for “subsection (i)”.

Subsec. (i)(10)(F), (G). Pub. L. 117–167, § 10105(a)(4)(B)–(D), added subpars. (F) and (G).

Subsec. (j). Pub. L. 117–167, § 10105(a)(5), added subsec. (j) and struck out former subsec. (j). Prior to amendment, text read as follows: “The Director shall support research and development activities to design future fusion reactor systems and examine and address the technical drivers for the cost of these systems.”

Subsecs. (o) to (q). Pub. L. 117–167, § 10105(a)(7), added subsecs. (o) to (q). Former subsec. (o) redesignated (r).

Subsec. (r). Pub. L. 117–167, § 10105(a)(6), (8)(A), redesignated subsec. (o) as (r) and substituted “Out of funds authorized to be appropriated for the Office of Science in a fiscal year, there” for “There” in introductory provisions.

Subsec. (r)(3) to (7). Pub. L. 117–167, § 10105(a)(8)(B), added pars. (3) to (7) and struck out former pars. (3) to (5) relating to appropriations for fiscal years 2023 to 2025, respectively.

2020—Subsec. (a). Pub. L. 116–260, § 2008(a)(2), added subsec. (a). Former subsec. (a) redesignated (b).

Subsecs. (b), (c). Pub. L. 116–260, § 2008(a)(1), redesignated subsecs. (a) and (b) as (b) and (c), respectively. Former subsec. (c) redesignated (d).

Subsec. (d). Pub. L. 116–260, § 2008(a)(3), amended subsec. (d) generally. Prior to amendment, text read as follows: “The Director shall support research and development activities for inertial fusion for energy applications.”

Pub. L. 116–260, § 2008(a)(1), redesignated subsec. (c) as (d). Former subsec. (d) redesignated (e).

Subsec. (e). Pub. L. 116–260, § 2008(a)(4), amended subsec. (e) generally. Prior to amendment, text read as follows: “The Director shall support research and development activities and facility operations at institutions of higher education, National Laboratories, and private facilities in the United States for a portfolio of alternative and enabling fusion energy concepts that may provide solutions to significant challenges to the establishment of a commercial magnetic fusion power plant, prioritized based on the ability of the United States to play a leadership role in the international fusion research community.”

Pub. L. 116–260, § 2008(a)(1), redesignated subsec. (d) as (e). Former subsec. (e) redesignated (f).

Subsecs. (f) to (h). Pub. L. 116–260, § 2008(a)(1), redesignated subsecs. (f) and (g) as (g) and (h), respectively.

Subsecs. (i) to (o). Pub. L. 116–260, § 2008(a)(5), added subsecs. (i) to (o).