This chapter, referred to in subsecs. (a)(1) and (b)(4), (6), was in the original “this Act”, meaning Pub. L. 93–406, known as the Employee Retirement Income Security Act of 1974. Titles I, III, and IV of such Act are classified principally to this chapter. For complete classification of this Act to the Code, see Short Title note set out under section 1001 of this title and Tables.

Paragraph (2), (3), or (4), referred to in subsec. (c)(1), probably should be a reference only to par. (2) or (3) of subsec. (c), as par. (3) was struck out, and par. (4) was redesignated as (3), by Pub. L. 101–239, title VII, § 7881(k), Dec. 19, 1989, 103 Stat. 2443.

2022—Subsec. (c)(1). Pub. L. 117–328 substituted “(as in effect on December 29, 2022)” for “(as in effect on July 31, 2015)”.

2015—Subsec. (c)(1). Pub. L. 114–41 substituted “July 31, 2015” for “July 6, 2012”. Amendment was executed to reflect the probable intent of Congress notwithstanding an extra closing quotation mark in the directory language.

2012—Subsec. (c)(1). Pub. L. 112–141 substituted “July 6, 2012” for “August 17, 2006”.

2006—Subsec. (c)(1). Pub. L. 109–280 substituted “August 17, 2006” for “October 22, 2004”.

2004—Subsec. (c)(1). Pub. L. 108–357 substituted “October 22, 2004” for “April 10, 2004”.

Pub. L. 108–218 substituted “April 10, 2004” for “December 17, 1999”.

1999—Subsec. (c)(1). Pub. L. 106–170 substituted “December 17, 1999” for “January 1, 1995”.

1994—Subsec. (c)(1). Pub. L. 103–465 substituted “1995” for “1991”.

1990—Subsec. (c)(1). Pub. L. 101–508 inserted “, or under section 420 of title 26 (as in effect on January 1, 1991)” after “insured plans”.

1989—Subsecs. (b)(3), (5), (c)(2)(A)(ii), (C). Pub. L. 101–239, § 7891(a)(1), substituted “Internal Revenue Code of 1986” for “Internal Revenue Code of 1954”, which for purposes of codification was translated as “title 26” thus requiring no change in text.

Subsec. (b)(3). Pub. L. 101–239, § 7894(e)(3), redesignated cls. (i) and (ii) as subpars. (A) and (B), respectively, struck out “, to the extent that such plan’s assets are held in one or more custodial accounts which qualify under section 401(f) or 408(h) of title 26, whichever is applicable” before the semicolon in subpar. (B), and inserted concluding provision “to the extent that such plan’s assets are held in one or more custodial accounts which qualify under section 401(f) or 408(h) of title 26, whichever is applicable.”

Subsec. (c)(2)(A). Pub. L. 101–239, § 7894(e)(1)(A), in introductory provisions, made technical amendment to reference to part 1 of subtitle E of subchapter III of this chapter to correct reference to corresponding part of original Act, requiring no change in text, and in cls. (i) and (ii), inserted “if such contribution or payment is” before “made by an employer”.

Subsec. (c)(3), (4). Pub. L. 101–239, § 7881(k), redesignated par. (4) as (3) and struck out former par. (3) which read as follows: “In the case of a contribution which would otherwise be an excess contribution (as defined in section 4979(c) of title 26) paragraph (1) shall not prohibit a correcting distribution with respect to such contribution from the plan to the employer to the extent permitted in such section to avoid payment of an excise tax on excess contributions under such section.”

1987—Subsec. (c)(2)(B). Pub. L. 100–203, § 9343(c)(1), amended subpar. (B) generally. Prior to amendment, subpar. (B) read as follows: “If a contribution is conditioned on qualification of the plan under section 401, 403(a), or 405(a) of title 26, and if the plan does not qualify, then paragraph (1) shall not prohibit the return of such contributions to the employer within one year after the date of denial of qualification of the plan.”

Subsec. (c)(3). Pub. L. 100–203, § 9343(c)(2), substituted “section 4979(c) of title 26” for “section 4972(b) of title 26”.

1980—Subsec. (a)(1). Pub. L. 96–364, § 402(b)(2), substituted “chapter” for “subchapter”.

Subsec. (b)(6). Pub. L. 96–364, § 411(c), added par. (6).

Subsec. (c)(1). Pub. L. 96–364, § 310(1), inserted reference to par. (4).

Subsec. (c)(2)(A). Pub. L. 96–364, § 410(a), substituted provisions relating to contributions or payments of withdrawal liability under part 1 of subtitle E of subchapter III of this chapter made by an employer to a plan by a mistake of fact, and by an employer to a multiemployer plan by a mistake of fact or law, for provisions relating to contributions made by an employer by a mistake of fact.

Subsec. (c)(4). Pub. L. 96–364, § 310(2), added par. (4).

Amendment by Pub. L. 117–328 applicable to transfers made after Dec. 29, 2022, see section 606(c) of Pub. L. 117–328, set out as a note under section 420 of Title 26, Internal Revenue Code.

Amendment by Pub. L. 109–280 applicable to plan years beginning after 2007, see section 108(e) of Pub. L. 109–280, set out as a note under section 1021 of this title.

Amendment by Pub. L. 106–170 applicable to qualified transfers occurring after Dec. 17, 1999, see section 535(c)(1) of Pub. L. 106–170, set out as a note under section 420 of Title 26, Internal Revenue Code.

Amendment by Pub. L. 101–508 applicable to qualified transfers under section 420 of title 26 made after Nov. 5, 1990, see section 12012(e) of Pub. L. 101–508, set out as a note under section 1021 of this title.

Amendment by section 7881(k) of Pub. L. 101–239 effective, except as otherwise provided, as if included in the provision of the Pension Protection Act, Pub. L. 100–203, §§ 9302–9346, to which such amendment relates, see section 7882 of Pub. L. 101–239, set out as a note under section 401 of Title 26, Internal Revenue Code.

Amendment by section 7891(a)(1) of Pub. L. 101–239 effective, except as otherwise provided, as if included in the provision of the Tax Reform Act of 1986, Pub. L. 99–514, to which such amendment relates, see section 7891(f) of Pub. L. 101–239, set out as a note under section 1002 of this title.

Section 7894(e)(1)(B) of Pub. L. 101–239 provided that: “The amendments made by subparagraph (A) [amending this section] shall take effect as if included in section 410 of the Multiemployer Pension Plan Amendments Act of 1980 [Pub. L. 96–364].”

Amendment by section 7894(e)(3) of Pub. L. 101–239 effective, except as otherwise provided, as if originally included in the provision of the Employee Retirement Income Security Act of 1974, Pub. L. 93–406, to which such amendment relates, see section 7894(i) of Pub. L. 101–239, set out as a note under section 1002 of this title.

Amendment by Pub. L. 96–364 effective Sept. 26, 1980, except as specifically provided, see section 1461(e) of this title.

Amendment by section 410(a) of Pub. L. 96–364 effective Jan. 1, 1975, except with respect to contributions received by a collectively bargained plan maintained by more than one employer before Sept. 26, 1980, see section 410(c) of Pub. L. 96–364, set out as a note under section 401 of Title 26, Internal Revenue Code.

Secretary authorized, effective Sept. 2, 1974, to promulgate regulations wherever provisions of this part call for the promulgation of regulations, see sections 1031 and 1114 of this title.

For special rules on applicability of amendments by subtitles A (§§ 101–108) and B (§§ 111–116) of title I of Pub. L. 109–280 to certain eligible cooperative plans, PBGC settlement plans, and eligible government contractor plans, see sections 104, 105, and 106 of Pub. L. 109–280, set out as notes under section 401 of Title 26, Internal Revenue Code.