(a) Purpose. Section 4211 of ERISA provides four methods for allocating unfunded vested benefits to employers that withdraw from a multiemployer plan: the presumptive method (section 4211(b)); the modified presumptive method (section 4211(c)(2)); the rolling-5 method (section 4211(c)(3)); and the direct attribution method (section 4211(c)(4)). With the minor exceptions covered in § 4211.3, a plan determines the amount of unfunded vested benefits allocable to a withdrawing employer in accordance with the presumptive method, unless the plan is amended to adopt an alternative allocative method. Generally, the PBGC must approve the adoption of an alternative allocation method. On September 25, 1984, 49 FR 37686, the PBGC granted a class approval of all plan amendments adopting one of the statutory alternative allocation methods. Subpart C sets forth the criteria and procedures for PBGC approval of nonstatutory alternative allocation methods. Section 4211(c)(5) of ERISA also permits certain modifications to the statutory allocation methods that PBGC may prescribe in a regulation. Subpart B of this part contains the permissible modifications to the statutory methods that plan sponsors may adopt without PBGC approval. Plans may adopt other modifications subject to PBGC approval under subpart C. Finally, under section 4211(f) of ERISA, the PBGC is required to prescribe rules governing the application of the statutory allocation methods or modified methods by plans following merger of multiemployer plans. Subpart D sets forth alternative allocative methods to be used by merged plans. In addition, such plans may adopt any of the allocation methods or modifications described under subparts B and C in accordance with the rules under subparts B and C.

(b) Scope. This part applies to all multiemployer plans covered by title IV of ERISA.

The following terms are defined in § 4001.2 of this chapter: Code, employer, IRS, multiemployer plan, nonforfeitable benefit, PBGC, plan, and plan year.

In addition, for purposes of this part:

Initial plan year means a merged plan's first complete plan year that begins after the effective date of the merged plan.

Initial plan year unfunded vested benefits means the unfunded vested benefits as of the close of the initial plan year, less the value as of the end of the initial plan year of all outstanding claims for withdrawal liability that can reasonably be expected to be collected from employers that had withdrawn as of the end of the initial plan year.

Merged plan means a plan that is the result of the merger of two or more multiemployer plans.

Merger means the combining of two or more multiemployer plans into one multiemployer plan.

Prior plan means the plan in which an employer participated immediately before that plan became a part of the merged plan.

Unfunded vested benefits means, as described in section 4213(c) of ERISA, the amount by which the value of nonforfeitable benefits under the plan exceeds the value of the assets of the plan.

Withdrawing employer means the employer for which withdrawal liability is being calculated under section 4201 of ERISA.

Withdrawn employer means an employer that, in a plan year before the withdrawing employer withdraws, has discontinued contributions to the plan or covered operations under the plan and whose obligation to contribute has not been assumed by a successor employer within the meaning of section 4204 of ERISA. A temporary suspension of contributions, including a suspension described in section 4218(2) of ERISA, is not considered a discontinuance of contributions.

(a) Construction plans. A plan that primarily covers employees in the building and construction industry must use the presumptive method for allocating unfunded vested benefits, except as provided in §§ 4211.11(b) and 4211.21(b).

(b) Code section 404(c) plans. A plan described in section 404(c) of the Code or a continuation of such a plan must use the rolling-5 method for allocating unfunded vested benefits unless the plan sponsor, by amendment, adopts an alternative method or modification.

(a) In general. Subject to paragraph (b) of this section, each of the allocation fractions used in the presumptive, modified presumptive and rolling-5 methods is based on contributions that certain employers have made to the plan for a 5-year period.

(1) The numerator of the allocation fraction, with respect to a withdrawing employer, is based on the “sum of the contributions required to be made” or the “total amount required to be contributed” by the employer for the specified period.

(2) The denominator of the allocation fraction is based on contributions that certain employers have made to the plan for a specified period.

(b) Disregarding surcharges and contribution increases. For each of the allocation fractions used in the presumptive, modified presumptive and rolling-5 methods in determining the allocation of unfunded vested benefits to an employer, a plan in endangered or critical status must disregard:

(1) Surcharge. Any surcharge under section 305(e)(7) of ERISA and section 432(e)(7) of the Code.

(2) Contribution increase. Any increase in the contribution rate or other increase in contribution requirements that goes into effect during plan years beginning after December 31, 2014, so that a plan may meet the requirements of a funding improvement plan under section 305(c) of ERISA and section 432(c) of the Code or a rehabilitation plan under section 305(e) of ERISA and 432(e) of the Code, except to the extent that one of the following exceptions applies pursuant to section 305(g)(3) or (4) of ERISA and section 432(g)(3) or (4) of the Code:

(i) The increases in contribution requirements are due to increased levels of work, employment, or periods for which compensation is provided.

(ii) The additional contributions are used to provide an increase in benefits, including an increase in future benefit accruals, permitted by section 305(d)(1)(B) or (f)(1)(B) of ERISA and section 432(d)(1)(B) or (f)(1)(B) of the Code.

(iii) The withdrawal occurs on or after the expiration date of the employer's collective bargaining agreement in effect in the plan year the plan is no longer in endangered or critical status, or, if earlier, the date as of which the employer renegotiates a contribution rate effective after the plan year the plan is no longer in endangered or critical status.

(c) Simplified methods. See §§ 4211.14 and 4211.15 for simplified methods of meeting the requirements of this section.

(a) In general. A plan must disregard the following nonforfeitable benefit reductions and benefit suspensions in determining a plan's nonforfeitable benefits for purposes of determining an employer's withdrawal liability under section 4201 of ERISA:

(1) Adjustable benefit. A reduction to adjustable benefits under section 305(e)(8) of ERISA and section 432(e)(8) of the Code.

(2) Lump sum. A benefit reduction arising from a restriction on lump sums or other benefits under section 305(f) of ERISA and section 432(f) of the Code.

(3) Benefit suspension. A benefit suspension under section 305(e)(9) of ERISA and section 432(e)(9) of the Code, but only for withdrawals not more than 10 years after the end of the plan year in which the benefit suspension takes effect.

(b) Simplified methods. See § 4211.16 for simplified methods for meeting the requirements of this section.