This part implements section 4044 of ERISA, which contains rules for allocating a plan's assets when the plan terminates. These rules have been in effect since September 2, 1974, the date of enactment of ERISA. This part applies to any single-employer plan covered by title IV of ERISA that submits a notice of intent to terminate, or for which PBGC commences an action to terminate the plan under section 4042 of ERISA.

(a) Subpart A. Sections 4044.1 through 4044.4 set forth general rules for applying §§ 4044.10 through 4044.17. Sections 4044.10 through 4044.17 interpret the rules and describe procedures for allocating plan assets to priority categories 1 through 6.

(b) Subpart B. The purpose of subpart B is to establish the method of determining the value of benefits and assets under terminating single-employer pension plans covered by title IV of ERISA. This valuation is needed for both plans trusteed under title IV and plans which are not trusteed. For the former, the valuation is needed to allocate plan assets in accordance with subpart A of this part and to determine the amount of any plan asset insufficiency. For the latter, the valuation is needed to allocate assets in accordance with subpart A and to distribute the assets in accordance with subpart B of part 4041 of this chapter.

(1) Section 4044.41 sets forth the general provisions of subpart B and applies to all terminating single-employer plans. Sections 4044.51 through 4044.58 prescribe the benefit valuation rules for plans that are placed into trusteeship by PBGC, including (in §§ 4044.55 through 4044.58) the rules and procedures a plan administrator shall follow to determine the expected retirement age (XRA) for a plan participant entitled to early retirement benefits for whom the annuity starting date is not known as of the valuation date. This applies to all trusteed plans which have such early retirement benefits. The plan administrator shall determine an XRA under § 4044.55, § 4044.56 or § 4044.57, as appropriate, for each active participant or participant with a deferred vested benefit who is entitled to an early retirement benefit and who as of the valuation date has not selected an annuity starting date.

(2) Sections 4044.71 through 4044.75 prescribe the benefit valuation rules for calculating the value of a benefit to be paid a participant or beneficiary under a terminating pension plan that is distributing assets where the plan has not been placed into trusteeship by PBGC.

(a) The following terms are defined in § 4001.2 of this chapter: annuity, bankruptcy filing date, basic-type benefit, Code, distribution date, earliest retirement age at valuation date, ERISA, expected retirement age (XRA), fair market value, guaranteed benefit, insurer, IRS, irrevocable commitment, majority owner, mandatory employee contributions, nonbasic-type benefit, nonforfeitable benefit, non-PPA 2006 bankruptcy termination, normal retirement age, notice of intent to terminate, PBGC, person, plan, plan administrator, single-employer plan, termination date, unreduced retirement age (URA), and voluntary employee contributions.

(b) For purposes of this part:

Deferred annuity means an annuity under which the specified date or age at which payments are to begin occurs after the valuation date.

Early retirement benefit means an annuity benefit payable under the terms of the plan, under which the participant is entitled to begin receiving payments before his or her normal retirement age and which is not payable on account of the disability of the participant. It may be reduced according to the terms of the plan.

Non-trusteed plan means a single-employer plan which is able to close out by purchasing annuities in the private sector

Priority category means one of the categories contained in sections 4044 (a)(1) through (a)(6) of ERISA that establish the order in which plan assets are to be allocated.

Trusteed plan means a single-employer plan which has been placed into trusteeship by PBGC.

Valuation date means (1) for non-trusteed plans, the date of distribution and (2) for trusteed plans, the termination date.

(c) For purposes of subpart B of this part (unless otherwise required by the context):

Age means the participant's age at his or her nearest birthday and is determined by rounding the individual's exact age to the nearest whole year. Half years are rounded to the next highest year. This is also known as the “insurance age.”

(d) For purposes of §§ 4044.55 through 4044.58:

Monthly benefit means the guaranteed benefit payable by PBGC.

(e) For purposes of §§ 4044.71 through 4044.75:

Lump sum payable in lieu of an annuity means a benefit that is payable in a single installment and is derived from an annuity payable under the plan.

Other lump sum benefit means a benefit in priority category 5 or 6, determined under subpart A of this part, that is payable in a single installment (or substantially so) under the terms of the plan, and that is not derived from an annuity payable under the plan. The benefit may be a severance pay benefit, a death benefit or other single installment benefit.

(a) Asset allocation. Upon the termination of a single-employer plan, the plan administrator shall allocate the plan assets available to pay for benefits under the plan in the manner prescribed by this subpart. Plan assets available to pay for benefits include all plan assets (valued according to § 4044.41(b)) remaining after the subtraction of all liabilities, other than liabilities for future benefit payments, paid or payable from plan assets under the provisions of the plan. Liabilities include expenses, fees and other administrative costs, and benefit payments due before the allocation date. Except as provided in § 4044.4(b), an irrevocable commitment by an insurer to pay a benefit, which commitment is in effect on the date of the asset allocation, is not considered a plan asset, and a benefit payable under such a commitment is excluded from the allocation process.

(b) Allocation date. For plans that close out under § 4041.28 or § 4041.50, assets shall be allocated as of the date plan assets are to be distributed. For other plans, assets shall be allocated as of the termination date.

(a) General. A plan administrator violates ERISA if plan assets are allocated or distributed upon plan termination in a manner other than that prescribed in section 4044 of ERISA and this subpart, except as may be required to prevent disqualification of the plan under the Code and regulations thereunder.

(b) Distributions in anticipation of termination. A distribution, transfer, or allocation of assets to a participant or to an insurance company for the benefit of a participant, made in anticipation of plan termination, is considered to be an allocation of plan assets upon termination, and is covered by paragraph (a) of this section. In determining whether a distribution, transfer, or allocation of assets has been made in anticipation of plan termination PBGC will consider all of the facts and circumstances including—

(1) Any change in funding or operation procedures;

(2) Past practice with regard to employee requests for forms of distribution;

(3) Whether the distribution is consistent with plan provisions; and

(4) Whether an annuity contract that provides for a cutback based on the guarantee limits in subpart B of part 4022 of this chapter could have been purchased from an insurance company.

(a) General. The plan administrator shall allocate plan assets available to pay for benefits under the plan using the rules and procedures set forth in paragraphs (b) through (f) of this section, or any other procedure that results in each participant (or beneficiary) receiving the same benefits he or she would receive if the procedures in paragraphs (b) through (f) were followed.

(b) Assigning benefits. The basic-type and nonbasic-type benefits payable with respect to each participant in a terminated plan shall be assigned to one or more priority categories in accordance with §§ 4044.11 through 4044.16. Benefits derived from voluntary employee contributions, which are assigned only to priority category 1, are treated, under section 204(c)(4) of ERISA and section 411(d)(5) of the Code, as benefits under a separate plan. The amount of a benefit payable with respect to each participant shall be determined as of the termination date, but, in a PPA 2006 bankruptcy termination, subject to the limitations in sections 4022(g) and 4044(e) of ERISA (and corresponding provisions of these regulations).

(c) Valuing benefits. The value of a participant's benefit or benefits assigned to each priority category shall be determined, as of the allocation date, in accordance with the provisions of subpart B of this part. The value of each participant's basic-type benefit or benefits in a priority category shall be reduced by the value of the participant's benefit of the same type that is assigned to a higher priority category. Except as provided in the next two sentences, the same procedure shall be followed for nonbasic-type benefits. The value of a participant's nonbasic-type benefits in priority categories 3, 5, and 6 shall not be reduced by the value of the participant's nonbasic-type benefit assigned to priority category 2. Benefits in priority category 1 shall neither be included in nor subtracted from lower priority categories. In no event shall a benefit assigned to a priority category be valued at less than zero.

(d) Allocating assets to priority categories. Plan assets available to pay for benefits under the plan shall be allocated to each priority category in succession, beginning with priority category 1. If the plan has sufficient assets to pay for all benefits in a priority category, the remaining assets shall then be allocated to the next lower priority category. This process shall be repeated until all benefits in priority categories 1 through 6 have been provided or until all available plan assets have been allocated.

(e) Allocating assets within priority categories. Except for priority categories 4 and 5, if the plan assets available for allocation to any priority category are insufficient to pay for all benefits in that priority category, those assets shall be distributed among the participants according to the ratio that the value of each participant's benefit or benefits in that priority category bears to the total value of all benefits in that priority category. If the plan assets available for allocation to priority category 4 are insufficient to pay for all benefits in that category, the assets shall be allocated, first, to the value of all participants' nonforfeitable benefits that would be assigned to priority category 4 other than those impacted by the majority-owner limitation under § 4022.26 of this chapter. If assets available for allocation to priority category 4 are sufficient to fully satisfy the value of those other benefits, the remaining assets shall then be allocated to the value of the benefits that would be guaranteed but for the majority-owner limitation. These remaining assets shall be distributed among the majority owners according to the ratio that the value of each majority owner's benefit that would be guaranteed but for the majority-owner limitation bears to the total value of all benefits that would be guaranteed but for the majority-owner limitation. If the plan assets available for allocation to priority category 5 are insufficient to pay for all benefits in that category, the assets shall be allocated, first, to the value of each participant's nonforfeitable benefits that would be assigned to priority category 5 under § 4044.15 after reduction for the value of benefits assigned to higher priority categories, based only on the provisions of the plan in effect at the beginning of the five-year period immediately preceding the termination date. If assets available for allocation to priority category 5 are sufficient to fully satisfy the value of those benefits, assets shall then be allocated to the value of the benefit increase under the oldest amendment during the five-year period immediately preceding the termination date, reduced by the value of benefits assigned to higher priority categories (including higher subcategories in priority category 5). This allocation procedure shall be repeated for each succeeding plan amendment within the five-year period until all plan assets available for allocation have been exhausted. If an amendment decreased benefits, amounts previously allocated with respect to each participant in excess of the value of the reduced benefit shall be reduced accordingly. In the subcategory in which assets are exhausted, the assets shall be distributed among the participants according to the ratio that the value of each participant's benefit or benefits in that subcategory bears to the total value of all benefits in that subcategory.

(f) Applying assets to basic-type or nonbasic-type benefits within priority categories. The assets allocated to a participant's benefit or benefits within each priority category shall first be applied to pay for the participant's basic-type benefit or benefits assigned to that priority category. Any assets allocated on behalf of that participant remaining after satisfying the participant's basic-type benefit or benefits in that priority category shall then be applied to pay for the participant's nonbasic-type benefit or benefits assigned to that priority category. If the assets allocable to a participant's basic-type benefit or benefits in all priority categories are insufficient to pay for all of the participant's guaranteed benefits, the assets allocated to that participant's benefit in priority category 4 shall be applied, first, to the guaranteed portion of the participant's benefit in priority category 4. The remaining assets allocated to that participant's benefit in priority category 4, if any, shall be applied to the nonguaranteed portion of the participant's benefit.

(g) Allocation to established subclasses. Notwithstanding paragraphs (e) and (f) of this section, the assets of a plan that has established subclasses within any priority category may be allocated to the plan's subclasses in accordance with the rules set forth in § 4044.17.

(a) Definition. The benefits in priority category 1 are participants' accrued benefits derived from voluntary employee contributions.

(b) Assigning benefits. Absent an election described in the next sentence, the benefit assigned to priority category 1 with respect to each participant is the balance of the separate account maintained for the participant's voluntary contributions. If a participant has elected to receive an annuity in lieu of his or her account balance, the benefit assigned to priority category 1 with respect to that participant is the present value of that annuity.

(a) Definition. The benefits in priority category 2 are participants' accrued benefits derived from mandatory employee contributions, whether to be paid as an annuity benefit with a pre-retirement death benefit that returns mandatory employee contributions or, if a participant so elects under the terms of the plan and subpart A of part 4022 of this chapter, as a lump sum benefit. Benefits are primarily basic-type benefits although nonbasic-type benefits may also be included as follows:

(1) Basic-type benefits. The basic-type benefit in priority category 2 with respect to each participant is the sum of the values of the annuity benefit and the pre-retirement death benefit determined under the provisions of paragraph (c)(1) of this section.

(2) Nonbasic-type benefits. If a participant elects to receive a lump sum benefit and if the value of the lump sum benefit exceeds the value of the basic-type benefit in priority category 2 determined with respect to the participant, the excess is a nonbasic-type benefit. There is no nonbasic-type benefit in priority category 2 for a participant who does not elect to receive a lump sum benefit.

(b) Conversion of mandatory employee contributions to an annuity benefit. Subject to the limitation set forth in paragraph (b)(3) of this section, a participant's accumulated mandatory employee contributions shall be converted to an annuity form of benefit payable at the normal retirement age or, if the plan provides for early retirement, at the expected retirement age. The conversion shall be made using the interest rates and factors specified in paragraph (b)(2) of this section. The form of the annuity benefit (e.g., straight life annuity, joint and survivor annuity, cash refund annuity, etc.) is the form that the participant or beneficiary is entitled to on the termination date. If the participant does not have a nonforfeitable right to a benefit, other than the return of his or her mandatory contributions in a lump sum, the annuity form of benefit is the form the participant would be entitled to if the participant had a nonforfeitable right to an annuity benefit under the plan on the termination date.

(1) Accumulated mandatory employee contributions. Subject to any addition for the cost of ancillary benefits plus interest, as provided in the following sentence, the amount of the accumulated mandatory employee contributions for each participant is the participant's total nonforfeitable mandatory employee contributions remaining in the plan on the termination date plus interest, if any, under the plan provisions. Mandatory employee contributions, if any, used after the effective date of the minimum vesting standards in section 203 of ERISA and section 411 of the Code for costs or to provide ancillary benefits such as life insurance or health insurance, plus interest under the plan provisions, shall be added to the contributions that remain in the plan to determine the accumulated mandatory employee contributions.

(2) Interest rates and conversion factors. The interest rates and conversion factors used in the administration of the plan shall be used to convert a participant's accumulated mandatory contributions to the annuity form of benefit. In the absence of plan rules and factors, the interest rates and conversion factors established by the IRS for allocation of accrued benefits between employer and employee contributions under the provisions of section 204(c) of ERISA and section 411(c) of the Code shall be used.

(3) Minimum accrued benefit. The annuity benefit derived from mandatory employee contributions may not be less than the minimum accrued benefit under the provisions of section 204(c) of ERISA and section 411(c) of the Code.

(4) Rollover amounts. In the case of a benefit resulting from rollover amounts, notwithstanding the provisions of paragraph (b)(2) of this section, the interest rates and conversion factors in paragraph (c)(4) of this section are used to determine the portion of the accrued benefit derived from the employee's contributions and, if any, the portion of the accrued benefit derived from employer contributions.

(c) Assigning benefits. If a participant or beneficiary elects to receive a lump sum benefit, his or her benefit shall be determined under paragraph (c)(2) of this section. Otherwise, the benefits with respect to a participant shall be determined under paragraph (c)(1) of this section.

(1) Annuity benefit and pre-retirement death benefit. The annuity benefit and the pre-retirement death benefit assigned to priority category 2 with respect to a participant are determined as follows:

(i) The annuity benefit is the benefit computed under paragraph (b) of this section.

(ii) Except for adjustments necessary to meet the minimum lump sum requirements as hereafter provided, the pre-retirement death benefit is the benefit under the plan that returns all or a portion of the participant's mandatory employee contributions upon the death of the participant before retirement. A benefit that became payable in a single installment (or substantially so) because the participant died before the termination date is a liability of the plan within the meaning of § 4044.3(a) and should not be assigned to priority category 2. A benefit payable upon a participant's death that is included in the annuity form of the benefit derived from mandatory employee contributions (e.g., the survivor's portion of a joint and survivor annuity or the cash refund portion of a cash refund annuity) is assigned to priority category 2 as part of the annuity benefit under paragraph (c)(1)(i) of this section and is not assigned as a death benefit. The pre-retirement death benefit may not be less than the minimum lump sum required upon withdrawal of mandatory employee contributions by the IRS under section 204(c) of ERISA and section 411(c) of the Code.

(2) Lump sum benefit. Except for adjustments necessary to meet the minimum lump sum requirements as hereafter provided, if a participant elects to receive a lump sum benefit under the provisions of the plan, the amount of the benefit that is assigned to priority category 2 with respect to the participant is—

(i) The combined value of the annuity benefit and the pre-retirement death benefit determined according to paragraph (c)(1) (which constitutes the basic-type benefit) plus

(ii) The amount, if any, of the participant's accumulated mandatory employee contributions that exceeds the combined value of the annuity benefit and the pre-retirement death benefit (which constitutes the nonbasic-type benefit), but not more than

(iii) The amount of the participant's accumulated mandatory contributions.

(3) For purposes of paragraph (c)(2) of this section, accumulated mandatory contributions means the contributions with interest, if any, payable under plan provisions to the participant or beneficiary on termination of the plan or, in the absence of such provisions, the amount that is payable if the participant withdrew his or her contributions on the termination date. The lump sum benefit may not be less than the minimum lump required by the IRS under section 204(c) of ERISA and section 411(c) of the Code upon withdrawal of mandatory employee contributions.

(4) Special rules for benefit resulting from rollover amounts—(i) Mandatory employee contributions. Notwithstanding paragraphs (c)(1) through (3) of this section, in the case of a benefit resulting from rollover amounts, the accrued benefit derived from mandatory employee contributions is determined using the interest rates and conversion factors under section 411(c)(2)(B) and (C) of the Code for purposes of computing an employee's accrued benefit derived from the employee's contributions. The annuity benefit and the pre-retirement death benefit, as determined on this basis, is the benefit resulting from rollover amounts in priority category 2.

(ii) Employer contributions. Any portion of a participant's accrued benefit resulting from rollover amounts that is in excess of the accrued benefit derived from mandatory employee contributions determined in accordance with paragraph (c)(4)(i) of this section (i.e., the accrued benefit derived from employer contributions) is a guaranteeable benefit in priority category 3, priority category 4, or priority category 5, as applicable under this part.

(a) Definition. The benefits in priority category 3 are those annuity benefits that were in pay status before the beginning of the 3-year period ending on the termination date, and those annuity benefits that could have been in pay status (then or as of the next payment date under the plan's rules for starting benefit payments) for participants who, before the beginning of the 3-year period ending on the termination date, had reached their Earliest PBGC Retirement Date (as determined under § 4022.10 of this chapter) based on plan provisions in effect on the day before the beginning of the 3-year period ending on the termination date. For example, in a plan with a termination date of September 1, 2012, the benefits in priority category 3 are those annuity benefits that were in pay status on or before September 1, 2009, and those annuity benefits that could have been in pay status for participants who, on or before September 1, 2009, had reached their Earliest PBGC Retirement Date based on plan provisions in effect on September 1, 2009. Benefit increases, as defined in § 4022.2, that were in effect throughout the 5-year period ending on the termination date, including automatic benefit increases during that period to the extent provided in paragraph (b)(5) of this section, shall be included in determining the priority category 3 benefit. For example, in a plan with a termination date of September 1, 2012, a benefit increase that was in effect throughout the 5-year period from September 2, 2007, to September 1, 2012, is included in priority category 3. Benefits are primarily basic-type benefits, although nonbasic-type benefits will be included if any portion of a participant's priority category 3 benefit is not guaranteeable under the provisions of subpart A of part 4022 and § 4022.21 of this chapter.

(b) Assigning benefits. The annuity benefit that is assigned to priority category 3 with respect to each participant is the lowest annuity that was paid or payable under the rules in paragraphs (b)(2) through (b)(6) of this section.

(1) Eligibility of participants and beneficiaries. A participant or beneficiary is eligible for a priority category 3 benefit if either of the following applies:

(i) The participant's (or beneficiary's) benefit was in pay status before the beginning of the 3-year period ending on the termination date.

(ii) Before the beginning of the 3-year period ending on the termination date, the participant was eligible for an annuity benefit that could have been in pay status and had reached his or her Earliest PBGC Retirement Date (as determined in § 4022.10 of this chapter, based on plan provisions in effect on the day before the beginning of the 3-year period ending on the termination date). Whether a participant was eligible to receive an annuity before the beginning of the 3-year period shall be determined using the plan provisions in effect on the day before the beginning of the 3-year period.

(iii) If a participant described in either of the preceding two paragraphs died during the 3-year period ending on the date of the plan termination and his or her beneficiary is entitled to an annuity, the beneficiary is eligible for a priority category 3 benefit.

(2) Plan provisions governing determination of benefit. In determining the amount of the priority category 3 annuity with respect to a participant, the plan administrator shall use the participant's age, service, actual or expected retirement age, and other relevant facts as of the following dates:

(i) Except as provided in paragraph (b)(3), for a participant or beneficiary whose benefit was in pay status before the beginning of the 3-year period ending on the termination date, the priority category 3 benefit shall be determined according to plan provisions in effect on the date the benefit commenced. The form of annuity elected by a retiree is considered the normal form of annuity for that participant.

(ii) Except as provided in paragraph (b)(3), for a participant who was eligible to receive an annuity before the beginning of the 3-year period ending on the termination date but whose benefit was not in pay status, the priority category 3 benefit and the normal form of annuity shall be determined according to plan provisions in effect on the day before the beginning of the 3-year period ending on the termination date as if the benefit had commenced at that time.

(3) General benefit limitations. The general benefit limitation is determined as follows:

(i) If a participant's benefit was in pay status before the beginning of the 3-year period, the benefit assigned to priority category 3 with respect to that participant is limited to the lesser of the lowest annuity benefit in pay status during the 3-year period ending on the termination date and the lowest annuity benefit payable under the plan provisions at any time during the 5-year period ending on the termination date.

(ii) Unless a benefit was in pay status before the beginning of the 3-year period ending on the termination date, the benefit assigned to priority category 3 with respect to a participant is limited to the lowest annuity benefit payable under the plan provisions, including any reduction for early retirement, at any time during the 5-year period ending on the termination date. If the annuity form of benefit under a formula that appears to produce the lowest benefit differs from the normal annuity form for the participant under paragraph (b)(2)(ii) of this section, the benefits shall be compared after the differing form is converted to the normal annuity form, using plan factors. In the absence of plan factors, the factors in subpart B of part 4022 of this chapter shall be used.

(iii) For purposes of this paragraph, if a terminating plan has been in effect less than five years on the termination date, computed in accordance with paragraph (b)(6) of this section, the lowest annuity benefit under the plan during the 5-year period ending on the termination date is zero. If the plan is a successor to a previously established defined benefit plan within the meaning of section 4021(a) of ERISA, the time it has been in effect will include the time the predecessor plan was in effect.

(4) Determination of beneficiary's benefit. If a beneficiary is eligible for a priority category 3 benefit because of the death of a participant during the 3-year period ending on the termination date, the benefit assigned to priority category 3 for the beneficiary shall be determined as if the participant had died the day before the 3-year period began.

(5) Automatic benefit increases. If plan provisions adopted and effective on or before the first day of the 5-year period ending on the termination date provided for automatic increases in the benefit formula for both active participants and those in pay status or for participants in pay status only, the lowest annuity benefit payable during the 5-year period ending on the termination date determined under paragraph (b)(3) of this section includes the automatic increases scheduled during the fourth and fifth years preceding termination, subject to the restriction that benefit increases for active participants in excess of the increases for retirees shall not be taken into account.

(6) Computation of time periods. For purposes of this section, a plan or amendment is “in effect” on the later of the date on which it is adopted or the date it becomes effective.

(c) PPA 2006 bankruptcy termination. In a PPA 2006 bankruptcy termination:

(1) For purposes of this paragraph (c), “applicable pre-termination period” means the period—

(i) Beginning on the first day of the 5-year period ending on the bankruptcy filing date; and

(ii) Ending on the termination date. For example, if the bankruptcy filing date is January 15, 2008, and the termination date is March 22, 2009, the applicable pre-termination period is the period beginning on January 16, 2003, and ending on March 22, 2009.

(2) “Applicable pre-termination period” is substituted for “5-year period ending on the termination date” each place that “5-year period ending on the termination date” appears in paragraphs (a) and (b) of this section.

(3) Except as provided in paragraph (a)(2) of this section, “bankruptcy filing date” is substituted for “termination date” and “date of the plan termination” each place that “termination date” and “date of the plan termination” appear in paragraphs (a) and (b) of this section. In paragraph (b)(5) of this section, “the bankruptcy filing date” is substituted for “termination” in the phrase “during the fourth and fifth years preceding termination.”

(4) Example: A plan provides for normal retirement at age 65 and has only one early retirement benefit: a subsidized early retirement benefit for participants who terminate employment on or after age 60 with 20 years of service. These plan provisions have been unchanged since 1990. The contributing sponsor of the plan files a bankruptcy petition in June 2008, and the plan terminates during the bankruptcy with a termination date in September 2010. A participant retired in July 2007, at which time he was age 60 and had 20 years of service, and began receiving the subsidized early retirement benefit. The participant has no benefit in priority category 3, because he was not eligible to retire three or more years before the June 2008 bankruptcy filing date.

The benefits assigned to priority category 4 with respect to each participant are the participant's guaranteed benefits, except as provided in the next sentence. The benefit assigned to priority category 4 with respect to a participant is not limited by the aggregate benefits limitations set forth in § 4022B.1 of this chapter for individuals who are participants in more than one plan or by the guarantee limitation applicable to majority owners set forth in § 4022.26.

The benefits assigned to priority category 5 with respect to each participant are all of the participant's nonforfeitable benefits under the plan.

The benefits assigned to priority category 6 with respect to each participant are all of the participant's benefits under the plan, whether forfeitable or nonforfeitable.

(a) General rule. A plan may establish one or more subclasses within any priority category, other than priority categories 1 and 2, which subclasses will govern the allocation of assets within that priority category. The subclasses may be based only on a participant's longer service, older age, or disability, or any combination thereof.

(b) Limitation. Except as provided in paragraph (c) of this section, whenever the allocation within a priority category on the basis of the subclasses established by the plan increases or decreases the cumulative amount of assets that otherwise would be allocated to guaranteed benefits, the assets so shifted shall be reallocated to other participants' benefits within the priority category in accordance with the subclasses.

(c) Exception for subclasses in effect on September 2, 1974. A plan administrator may allocate assets to subclasses within any priority category, other than priority categories 1 and 2, without regard to the limitation in paragraph (b) of this section if, on September 2, 1974, the plan provided for allocation of plan assets upon termination of the plan based on a participant's longer service, older age, or disability, or any combination thereof, and—

(1) Such provisions are still in effect; or

(2) The plan, if subsequently amended to modify or remove those subclasses, is re-amended to re-establish the same subclasses on or before July 28, 1981.

(d) Discrimination under Code. Notwithstanding the provisions of paragraphs (a) through (c) of this section, allocation of assets to subclasses established under this section is permitted only to the extent that the allocation does not result in discrimination prohibited under the Code and regulations thereunder.