88 STAT. ]
PUBLIC LAW 93.406-SEPT. 2, 1974
911
"(ii) interest (if any) under the plan to the end of the last plan year to which subsecition (a)(2) does not apply (by reason of the applicable effective date), and "(iii) interest on the sum of the amounts determined under clauses (i) and (ii) compounded annually at the rate of 5 percent per annum from the beginning of the first plan year to which subsection (a)(2) applies (by reason of the applicable effective date) to the date upon which the employee would attain normal retirement age. For purposes of this subparagraph, the term 'mandatory con- "Mandatory tributions' means amounts contributed to the plan by the '^°"t"butions." employee which are required as a condition of employment, as la condition of participation in such plan, or as a condition of obtaining benefits under the plan attributable to employer contributions. " (D) ADJUSTMENTS.—The Secretary or his delegate is authorized to adjust by regulation the conversion factor described in subparagraph (B), the rate of interest des<;ribed in clause (iii) of subparagraph (C), or both, from time to time as he may deem necessary. The rate of interest shall bear the relationship to 5 percent which the Secretary or his delegate determines to be comparable to the relationship which the long-term money rates and investment yields for the last period of 10 calendar years ending at least 12 months before the beginning of the plan year bear to the long-term money rates and investment yields for the 10-calendar year period 1964 through 1973. No such adjustment shall be effective for a plan year beginning before the expiration of 1 year after such adjustment is determined and published. " (E) LIMITATION.—The accrued benefit derived from employee contributions shall not exceed the greater of— "(i) the employee's accrued benefit under the plan, or "(ii) the accrued benefit derived from employee contributions determined as though the amounts calculated under clauses (ii) and (iii) of subparagraph (C) were zero. "(3) ACTUARIAL ADJUSTMENT.—For purposes of this section, in the case of any defined benefit plan, if an employee's accrued benefit is to be determined as an amount other than an annual benefit commencing at normal retirement age, or if the accrued benefit derived from contributions made by an employee is to be determined with respect to a benefit 6ther than an annual benefit in the form of a single life annuity (without ancillary benefits) commencing at normal retirement age, the employee's accrued benefit, or the accrued benefits derived from contributions made by an employee, as the case may be, shall be the actuarial equivalent of such benefit or amount determined under paragraph (1) or (2). "(d)
SPECIAL RULES.—
"(1) COORDINATION WITH SECTION 40i(a)(4).—A plan which satisfies the requirements of this section shall be treated as satisfying any vesting requirements resulting from the application of section 401(a)(4) unless— " (A) there has been a pattern of abuse under the plan (such as a dismissal of employees before their accrued benefits become nonforfeitable) tending to discriminate in favor of employees who are officers, shareholders, or highly compensated, or
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