Pub. L. 98–369, div. A, title V, § 511(e), July 18, 1984, 98 Stat. 862, as amended by Pub. L. 99–514, title XVIII, § 1851(a)(12), (14), Oct. 22, 1986, 100 Stat. 2862, provided that:
“(1) In general.—
Except as otherwise provided in this subsection, the amendments made by this section [enacting this subpart] shall apply to contributions paid or accrued after December 31, 1985, in taxable years ending after such date.
“(2) Special rule for collective bargaining agreements.—In the case of plan maintained pursuant to 1 or more collective bargaining agreements—
between employee representatives and 1 or more employers, and
in effect on July 1, 1985 (or ratified on or before such date),
the amendments made by this section shall not apply to years beginning before the date on which the last of the collective bargaining agreements relating to the plan terminates (determined without regard to any extension thereof agreed to after July 1, 1985).
“(3) Special rule for paragraph (2).—
For purposes of paragraph (2), any plan amendment made pursuant to a collective bargaining agreement relating to the plan which amends the plan solely to conform to any requirement added by this section shall not be treated as a termination of such collective bargaining agreement.
“(4) Special effective date for contributions of facilities.—Notwithstanding paragraphs (1) and (2), the amendments made by this section shall apply in the case of—
any other contribution after June 22, 1984
, to a welfare benefit fund
to be used to acquire or improve a facility.
“(5) Binding contract exceptions to paragraph (4).—Paragraph (4) shall not apply to any facility placed in service before January 1, 1987—
which is acquired or improved by the fund
(or contributed to the fund
) pursuant to a binding contract in effect on June 22, 1984
, and at all times thereafter, or
the construction of which by or for the fund
began before June 22, 1984
“(6) Amendments related to tax on unrelated business income.—
The amendments made by subsection (b) [amending section 512 of this title
] shall apply with respect to taxable years ending after December 31, 1985
. For purposes of section 15 of the Internal Revenue Code of 1954
[now 1986], such amendments shall be treated as a change in the rate of a tax imposed by chapter 1 of such Code.
“(7) Amendments related to excise taxes on certain welfare benefit plans.—
The amendments made by subsection (c) [enacting section 4976 of this title
] shall apply to benefits provided after December 31, 1985
For provisions that nothing in amendment by Pub. 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 Pub. L. 115–141, set out as a note under section 23 of this title.
Plan Amendments Not Required Until January 1, 1989
For provisions directing that if any amendments made by subtitle A or subtitle C of title XI [§§ 1101–1147 and 1171–1177] or title XVIII [§§ 1800–1899A] of Pub. L. 99–514 require an amendment to any plan, such plan amendment shall not be required to be made before the first plan year beginning on or after Jan. 1, 1989, see section 1140 of Pub. L. 99–514, as amended, set out as a note under section 401 of this title.
Effective Date of Regulations
Pub. L. 99–514, title XVIII, § 1851(a)(8)(B), Oct. 22, 1986, 100 Stat. 2860, provided that:
“Except in the case of a reserve for post-retirement medical or life insurance benefits and any other arrangement between an insurance company and an employer under which the employer has a contractual right to a refund or dividend based solely on the experience of such employer, any account held for an employer by any person and defined as a fund
in regulations issued pursuant to section 419(e)(3)(C) of the Internal Revenue Code of 1954
[now 1986] shall be considered a ‘fund’
no earlier than 6 months following the date such regulations are published in final form.”