88 STAT. ]
PUBLIC LAW 93-406-SEPT. 2, 1974
857
(D) For purposes of this section, in the case of any maritime industry, 125 days of service shall be treated as 1,000 hours of service. The Regulations. Secretary may prescribe regulations to carry out the purposes of this subparagraph. (3)(A) For purposes of this paragraph, the term "1-year break in. "i-year break service" means a calendar year, plan year, or other 12-consecutivemonth period designated by the plan (and not prohibited under regulations prescribed by the Secretary) during which the participant has not completed more than 500 hours of service. (B) For purposes of paragraph (1), in the case of any employee who has any 1-year break in service, years of service before such break shall not be required to be taken into account until he has completed a year of service after his return. (C) For purposes of paragraph (1), in the case of any participant in an individual account plan or an insured defined benefit plan which satisfies the requirements of subsection 2 0 4 (b)(1)(F) who has any 1-year break in service, years of service after such break shall not be required to be taken into account for purposes of determining the nonforfeitable percentage of his accrued benefit derived from employer contributions which accrued before such break. (D) For purposes of paragraph (1), in the case of a participant who, under the plan, does not have any nonforfeitable right to an accrued benefit derived from employer contributions, years of service before any 1-year break in service shall not be required to be taken into account if the number of consecutive 1-year breaks in service equals or exceeds the aggregate number of such years of service prior to such break. Such aggregate number of years of service before such break shall be deemed not to include any years of service not required to be taken into account under this subparagraph by reason of any prior break in service. (4) CROSS KEFEREXCES.—
(A) For definitions of "accrued benefit" and "normal retirement age", see sections 3 (23) and (24). (B) For effect of certain cash out distributions, see section 204(d)(1). (c)(1)(A) A plan amendment changing any vesting schedule under the plan shall be treated as not satisfying the requirements of subsection (a)(2) if the nonforfeitable percentage of the accrued benefit derived from employer contributions (determined as of the later of the date such amendment is adopted, or the date such amendment becomes effective) of any employee who is a participant in the plan is less than such nonforfeitable percentage computed under the plan without regard to such amendment. (B) A plan amendment changing any vesting schedide under the plan shall be treated as not satisfying the requirements of subsection (a)(2) unless each participant having not less than 5 years of service is permitted to elect, within a reasonable period after adoption of such amendment, to have his nonforfeitable percentage computed under the plan without regard to such amendment. (2) Subsection (a) shall not apply to benefits which may not be provided for designated employees in the event of early termination of the plan under provisions of the plan adopted pursuant to regulations prescribed by the Secretary of the Treasury to preclude the discrimination prohibited by section 401(a)(4) of the Internal Revenue Code of 1954. (3) The requirements of subsection (a)(2) shall be deemed to be satisfied in the case of a class ^ear plan if such plan provides that 100 percent of each employee's right to or derived from the contributions of the employer on his behalf with respect to any plan year are
^^^" amend-
Post, p. 938.
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