(a) In general—(1) Alternative requirements. A plan is not a qualified plan (and a trust forming a part of such plan is not a qualified trust) unless the plan satisfies the requirements of section 411(a)(2) and this section. A plan satisfies the requirements of this section if is satisfies the requirements of paragraph (b), (c), or (d) of this section.

(2) Composite arrangements. A plan will not be considered to satisfy the requirements of paragraph (b), (c), or (d) of this section unless it satisfies all requirements of a particular one of such paragraphs with respect to all of an employee's years of service. A plan which, for example, satisfies the requirements of paragraph (b) (but not (c) or (d)) for an employee's first 9 years of service and satisfies the requirements of paragraph (c) (but not (b)) for all of his remaining years of service, does not satisfy the requirements of this section. A plan is not precluded from satisfying the requirement of one such paragraph with respect to one group of employees and another such paragraph with respect to another group provided that the groups are not so structured as to evade the requirements of this paragraph. For example, if plan A provides that employees who commence participation before age 30 are subject to the “rule of 45” vesting schedule and employees who commence participation after age 30 are subject to the full vesting after 10 years schedule, plan A would be so structured as to evade the requirements of this paragraph.

(3) Plan amendments. A plan which satisfies the requirements of a particular one of such paragraphs for each of an employee's years of service and which is amended so that, as amended, it satisfies the requirements of another such paragraph for all such years of service, satisfies the requirements of this section even though, as amended, it does not satisfy the requirements of the paragraph which were satisfied prior to the amendment. See §1.411(a)-8 for rules relating to employee election where the vesting schedule is amended.

(b) 10-year vesting. A plan satisfies the requirements of section 411(a)(2) (A) and this paragraph if an employee who has completed 10 years of service has a nonforfeitable right to 100 percent of his accrued benefit derived from employer contributions.

(c) 5- to 15-year vesting. A plan satisfies the requirements of section 411(a)(2) (B) and this paragraph if an employee who has completed at least 5 years of service has a nonforfeitable right to a percentage of his accrued benefit derived from employer contribution which percentage is not less than the nonforfeitable percentage determined under the following table:

(d) Rule of 45. A plan satisfies the requirements of section 411(a)(2)(C) and this paragraph if an employee is entitled to the greater of the two percentages determined under paragraph (d) (1) or (2) of this section.

(1) Age and service test. An employee who is not separated from the service, who has completed at least 5 years of service, and with respect to whom the sum of his age and years of service equals of exceeds 45, has a nonforfeit- able right to a percentage of his accrued benefit derived from employer contributions which is not less than the nonforfeitable percentage corresponding to his number of completed years of service to the sum of his age and completed years of service (whichever percentage is the lesser) determined under the following table:

(2) Service test. An employee who has completed at least 10 years of service has a nonforfeitable right to a percentage of his accrued benefit derived from employer contributions determined under the following table:

(3) Computation of age. For purposes of subparagraph (1) of this paragraph, the age of an employee is his age on his last birthday.

(e) Examples. The rules provided by this section are illustrated by the following examples:

(Sec. 411 (88 Stat. 901; 26 U.S.C. 411))

[T.D. 7501, 42 FR 42325, Aug. 23, 1977]