Treas. Reg. § 1.411(a)-8 — Changes in vesting schedule.

(a) Requirement of prior schedule. Under section 411(a)(10)(A), for plan years for which section 411 applies, a plan will be treated as not meeting the minimum vesting standards of section 411(a)(2) if the plan does not satisfy the requirements of this paragraph. If the vesting schedule of a plan is amended, then as of the date such amendment is adopted, the plan satisfies the requirements of this paragraph if, under the plan as amended, in the case of an employee who is a participant on—

(1) The date the amendment is adopted, or

(2) The date the amendment is effective, if later.

The nonforfeitable percentage (determined as of such date) of such employee's right to his employer-derived accrued benefit is not less than his percentage computed under the plan without regard to such amendment.

(b) Election of former schedule—(1) In general. Under section 411 (a)(10)(B), for plan years for which section 411 applies, if the vesting schedule of a plan is amended, the plan will not be treated as meeting the minimum vesting standards of section 411 (a)(2) unless the plan as amended, provides that each participant whose nonforfeitable percentage of his accrued benefit derived from employer contributions is determined under such schedule, and who has completed at least 5 years of service with the employer, may elect, during the election period, to have the nonforfeitable percentage of his accrued benefit derived from employer contributions determined without regard to such amendment. Notwithstanding the preceding sentence, no election need be provided for any participant whose nonforfeitable percentage under the plan, as amended, at any time cannot be less than such percentage determined without regard to such amendment.

(2) Election period. For purposes of subparagraph (1) of this paragraph, the election period under the plan must begin no later than the date the plan amendment is adopted and end no earlier than the latest of the following dates:

(i) The date which is 60 days after the day the plan amendment is adopted,

(ii) The date which is 60 days after the day the plan amendment becomes effective, or

(iii) The date which is 60 days after the day the participant is issued written notice of the plan amendment by the employer or plan administrator.

(3) Service requirement. For purposes of subparagraph (1) of this paragraph, a participant shall be considered to have completed 5 years of service if such participant has completed 5 years of service, whether or not consecutive, without regard to the exceptions of section 411(a)(4) prior to the expiration of the election period described in subparagraph (2) of this paragraph. For the meaning of the term “year of service”, see regulations prescribed by the Secretary of Labor under 29 CFR Part 2530, relating to minimum standards for employee pension benefit plans.

(4) Election only by participant. The election described in subparagraph (1) of this paragraph is available only to an individual who is a participant in the plan at the time such election is made.

(5) Election may be irrevocable. A plan, as amended, shall not fail to meet the minimum vesting standards of section 411(a)(2) by reason of section 411(a)(10)(B) merely because such plan provides that the election described in subparagraph (1) of this paragraph is irrevocable.

(6) Relationship with section 411(a)(2). The election described in subparagraph (1) of this paragraph is available for a vesting schedule which does not satisfy the requirements of section 411(a)(2) only if under such schedule all participants have a 50 percent nonforfeitable right after 10 years of service, and a 100 percent nonforfeitable right after 15 years of service, in their employer-derived accrued benefit. If the vesting schedule provides less vesting than the percentages required by the preceding sentence, the plan can be amended to provide for such vesting.

(c) Special rules—(1) Amendment of vesting schedule. For purposes of this section, an amendment of a vesting schedule is each plan amendment which directly or indirectly affects the computation of the nonforfeitable percentage of employees' rights to employer-derived accrued benefits. Consequently, such an amendment, for example, includes each change in the plan which affects either the plan's computation of years of service or of vesting percentages for years of service.

(2) Aggregation of amendments. All plan amendments which are: (i) amendments of a vesting schedule within the meaning of subparagraph (1) of this paragraph and (ii) adopted and effective at the same time, shall be deemed to be a single amendment for purposes of applying the rules in paragraphs (a) and (b) of this section.