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Treas. Reg. § 1.410(a)-2

Effective dates.
CFR 2005 annual edition (revised as of 2005-04-01) · superseded Apr 1, 2006 · last amended by T.D. 7508, 42 FR 47194, Sept. 20, 1977
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(a) Plans not in existence on January 1, 1974. Under section 1017(a) of the Employee Retirement Income Security Act of 1974, in the case of a plan which was not in existence on January 1, 1974, section 410 and the regulations thereunder apply for plan years beginning after September 2, 1974. See paragraph (c) of this section for time plan is considered in existence.
(b) Plans in existence on January 1, 1974. Under section 1017(b) of the Employee Retirement Income Security Act of 1974, in the case of a plan which was in existence on January 1, 1974, section 410 and the regulations thereunder apply for plan years beginning after December 31, 1975. See paragraph (c) of this section for time plan is considered to be in existence.
(c) Time of plan existence
(1) General rule. For purposes of this section, a plan is considered to be in existence on a particular day if—
(i) The plan on or before that day was reduced to writing and adopted by the employer (including, in the case of a corporate employer, formal approval by the employer's board of directors and, if required, shareholder), even though no amounts had been contributed under the plan as of such day, and
(ii) The plan was not terminated on or before that day.
(2) Collectively bargained plan. Notwithstanding subparagraph (1) of this paragraph, a plan described in section 413(a), relating to a plan maintained pursuant to a collective bargaining agreement, is considered to be in existance on a particular day if—
(i) On or before that day there is a legally enforceable agreement to establish such a plan signed by the employer, and
(ii) The employer contributions to be made to the plan are set forth in the agreement.
(3) Special rule. If a plan is considered to be in existence on January 1, 1974, under subparagraph (1) of this paragraph, any other plan with which such existing plan is merged or consolidated shall also be considered to be in existence on such date.
(d) Certain existing plans may elect new provisions—(1) In general. The plan administrator (as defined in section 414(g)) of a plan that was in existence on January 1, 1974, may elect to have the provisions of the Code relating to participation, vesting, funding, and form of benefit (as in effect from time to time) apply to a plan year selected by the plan year selected by the plan administrator which begins after September 2, 1974, but before the otherwise applicable effective dates determined under section 1017 (b) or (c), 1021, or 1024 of the Employee Retirement Income Security Act of 1974, and to all subsequent plan years. The provisions referred to are the amendments to the Code made by sections 1011, 1012, 1013, 1015, 1016(a) (1) through (11) and (13) through (27), 1021, and 1022(b) of the Employee Retirement Income Security Act of 1974.
(2) Election is irrevocable. Any election made under this paragraph, once made shall be irrevocable.
(3) Procedure and time for making election. An election under this paragraph shall be made by attaching a statement to either the annual return required under section 6058(a) (or an amended return) with respect to the plan which is filed for the first plan year for which the election is effective or to a written request for a determination letter relating to the qualification of the plan under section 401(a), 403(a), or 405(a) of the Code and, if trusteed, the exempt status under section 501(a) of the Code of a trust consituting a part of the plan. If the election is made with a written request for a determination letter, the election may be conditioned upon issuance of a favorable determination letter and will become irrevocable upon issuance of such letter. The statement shall indicate that the election is made under section 1017(d) of the Employee Retirement Income Security Act of 1974 and the first plan year for which the election is effective.
(e) Examples. The rules of this section are illustrated by the following examples:

Example (1).

A plan is adopted on January 2, 1974, effective as of Janurary 1, 1974. The plan is not considered to have been in existence on Janurary 1, 1974.

Example (2).

A plan was in existence on January 1, 1974, and was amended on November 1, 1974, to increase benefits. The fact that the plan was amended is not relevant and the amended plan is considered to be in existence on January 1, 1974.

Example (3).

(i) A subsidiary business corporation is a member of a controlled group of corporations within the meaning of IRC section 1563(a). On November 1, 1974, the plan of the parent corporation is amended to provide coverage for employees of the subsidiary corporation. This amendment of the parent corporation's plan does not affect the effective date of section 410 with respect to the parent corporation's plan. No distinction is made for this purpose between employees of the parent corporation and employees of the subsidiary corporation.

(ii) If the subsidiary adopted a separate plan on November 1, 1974, under paragraph (a) of this section, section 410 would apply to that plan for its first plan year beginning after September 2, 1974. However, the adoption of a different plan by the subsidiary would not affect the time section 410 applies to the plan of the parent corporation. If, instead of adopting its own separate plan, the subsidiary merely executed an adoption agreement under the terms of the parent plan providing that a subsidiary, upon the execution of an adoption agreement, will become part of the parent plan, the effective date of section 410 with respect to such plan will not be affected by the adoption of the plan by the subsidiary.

Source credit, amendments & notes

[T.D. 7508, 42 FR 47194, Sept. 20, 1977]

(Sec. 410 (88 Stat. 898; 26 U.S.C. 410))

Treas. Reg. § 1.410(a)-2 — Effective dates. · CFR 2005 annual edition (revised as of 2005-04-01) · https://pensionresource.website/EAMain?content=EAMain.Law&id=cfr26-1.410%28a%29-2&asof=2001-09-06 · printed Oct 16, 2026
On this page
  • (a) Plans not in existence on January 1, 1974.
  • (b) Plans in existence on January 1, 1974.
  • (c) Time of plan existence
  • (d) (d) Certain existing plans may elect new provisions—(1) In …
  • (e) Examples.
Implements
I.R.C. § 410 Minimum participation standards
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Each row is a version of the text as published by the official source. Code dates are the edition/release point that first reflected the change; regulation dates are eCFR effective dates. The library checks the official sources automatically, so new versions appear here on their own; “run” opens the sync that recorded a version.

EffectiveThroughSourceAmended by
Apr 1, 1997Mar 31, 2001CFR 2000 annual edition (revised as of 2000-04-01) run 127T.D. 7508, 42 FR 47194, Sept. 20, 1977View
Apr 1, 2001Mar 31, 2006CFR 2005 annual edition (revised as of 2005-04-01) run 127T.D. 7508, 42 FR 47194, Sept. 20, 1977View · Redline (sign in)
Apr 1, 2006Mar 31, 2013CFR 2012 annual edition (revised as of 2012-04-01) run 127T.D. 7508, 42 FR 47194, Sept. 20, 1977View · Redline (sign in)
Apr 1, 2013currenteCFR editorial change effective 2016-09-09 run 2T.D. 7508, 42 FR 47194, Sept. 20, 1977View · Redline (sign in)
Provision-level history (blame)