No pension plan may provide that any part of a participant’s accrued benefit derived from employer contributions (whether or not otherwise nonforfeitable) is forfeitable solely because of withdrawal by such participant of any amount attributable to the benefit derived from contributions made by such participant. The preceding sentence shall not apply (1) to the accrued benefit of any participant unless, at the time of such withdrawal, such participant has a nonforfeitable right to at least 50 percent of such accrued benefit, or (2) to the extent that an accrued benefit is permitted to be forfeited in accordance with section 1053(a)(3)(D)(iii) of this title.
Notwithstanding any other provision of this part, the fiduciary of a pension plan that is subject to the additional funding requirements of section 1083(j)(4) of this title shall not permit a prohibited payment to be made from a plan during a period in which such plan has a liquidity shortfall (as defined in section 1083(j)(4)(E)(i) of this title).
Subparagraph (A) shall not apply to any amendment which provides for an increase in benefits under a formula which is not based on a participant’s compensation, but only if the rate of such increase is not in excess of the contemporaneous rate of increase in average wages of participants covered by the amendment.
A defined benefit plan which is a single-employer plan shall provide that, during any period in which the plan sponsor is a debtor in a case under title 11 or similar Federal or State law, the plan may not pay any prohibited payment. The preceding sentence shall not apply on or after the date on which the enrolled actuary of the plan certifies that the adjusted funding target attainment percentage of such plan (determined by not taking into account any adjustment of segment rates under section 1083(h)(2)(C)(iv) of this title) is not less than 100 percent.
For purposes of this clause, a participant and any beneficiary on his behalf (including an alternate payee, as defined in subsection (d)(3)(K)) shall be treated as 1 participant. If the accrued benefit of a participant is allocated to such an alternate payee and 1 or more other persons, the amount under clause (i) shall be allocated among such persons in the same manner as the accrued benefit is allocated unless the qualified domestic relations order (as defined in subsection (d)(3)(B)(i)) provides otherwise.
Subparagraph (A) shall cease to apply with respect to any plan year, effective as of the first day of the plan year, upon payment by the plan sponsor of a contribution (in addition to any minimum required contribution under section 1083 of this title) equal to the amount sufficient to result in an adjusted funding target attainment percentage of 60 percent.
The security shall be released (and any amounts thereunder shall be refunded together with any interest accrued thereon) at such time as the Secretary of the Treasury may prescribe in regulations, including regulations for partial releases of the security by reason of increases in the adjusted funding target attainment percentage.
Subject to clause (iii), in any case in which a benefit limitation under paragraph (1), (2), (3), or (4) would (but for this subparagraph and determined without regard to paragraph (1)(B), (2)(B), or (4)(B)) apply to such plan for the plan year, the plan sponsor of such plan shall be treated for purposes of this chapter as having made an election under section 1083(f) of this title to reduce the prefunding balance or funding standard carryover balance by such amount as is necessary for such benefit limitation to not apply to the plan for such plan year.
In any case in which a benefit limitation under paragraph (1), (2), (3), or (4) has been applied to a plan with respect to the plan year preceding the current plan year, the adjusted funding target attainment percentage of the plan for the current plan year shall be presumed to be equal to the adjusted funding target attainment percentage of the plan for the preceding plan year until the enrolled actuary of the plan certifies the actual adjusted funding target attainment percentage of the plan for the current plan year.
In any case in which no certification of the adjusted funding target attainment percentage for the current plan year is made with respect to the plan before the first day of the 10th month of such year, for purposes of paragraphs (1), (2), (3), and (4), such first day shall be deemed, for purposes of such paragraph, to be the valuation date of the plan for the current plan year and the plan’s adjusted funding target attainment percentage shall be conclusively presumed to be less than 60 percent as of such first day.
Unless the plan provides otherwise, payments and accruals will resume effective as of the day following the close of the period for which any limitation of payment or accrual of benefits under paragraph (3) or (4) applies.
Nothing in this paragraph shall be construed as affecting the plan’s treatment of benefits which would have been paid or accrued but for this subsection.
The term “adjusted funding target attainment percentage” means the funding target attainment percentage which is determined under subparagraph (A) by increasing each of the amounts under subparagraphs (A) and (B) of section 1083(d)(2) of this title by the aggregate amount of purchases of annuities for employees other than highly compensated employees (as defined in section 414(q) of title 26) which were made by the plan during the preceding 2 plan years.
In the case of a plan for any plan year, if the funding target attainment percentage is 100 percent or more (determined without regard to the reduction in the value of assets under section 1083(f)(4) of this title), the funding target attainment percentage for purposes of subparagraphs (A) and (B) shall be determined without regard to such reduction.