(a) General. For a plan that is not a significantly affected plan, the plan solvency requirement of section 4231(b)(3) of ERISA and § 4231.3(a)(3)(i) is satisfied if—

1. (1) The plan's expected fair market value of assets immediately after the merger or transfer equals or exceeds five times the benefit payments for the last plan year ending before the proposed effective date of the merger or transfer; or
2. (2) In each of the first five plan years beginning on or after the proposed effective date of the merger or transfer, the plan's expected fair market value of assets as of the beginning of the plan year plus expected contributions and investment earnings equal or exceed expected expenses and benefit payments for the plan year.

(b) Significantly affected plans. The plan solvency requirement of section 4231(b)(3) of ERISA and § 4231.3(a)(3)(i) is satisfied for a significantly affected plan if all of the following requirements are met:

1. (1) Expected contributions equal or exceed the estimated amount necessary to satisfy the minimum funding requirement of section 431 of the Code for the five plan years beginning on or after the proposed effective date of the transaction.
2. (2) The plan's expected fair market value of assets immediately after the transaction equals or exceeds the total amount of expected benefit payments for the first five plan years beginning on or after the proposed effective date of the transaction.
3. (3) Expected contributions for the first plan year beginning on or after the proposed effective date of the transaction equal or exceed expected benefit payments for that plan year.

4. (4) Expected contributions for the amortization period equal or exceed the unfunded accrued benefits plus expected normal costs for the period. The enrolled actuary may select as the amortization period either—

   1. (i) The first 25 plan years beginning on or after the proposed effective date of the transaction, or
   2. (ii) The amortization period for the resulting base when the combined charge base and the combined credit base are offset under section 431(b)(5) of the Code.

(c) Rules for determinations. In determining whether a transaction satisfies the plan solvency requirements set forth in this section, the following rules apply:

1. (1) Expected contributions after a merger or transfer must be determined by assuming that contributions for each plan year will equal contributions for the last full plan year ending before the date on which the notice of merger or transfer is filed with PBGC. If expected contributions include withdrawal liability payments, such payments must be shown separately. If the withdrawal liability payments are not the assessed amounts, or are not in accordance with the schedule of payments, or include future assessments, include the basis for such differences, with supporting data, calculations, assumptions, and methods. In addition, contributions must be adjusted to reflect—

   1. (i) The merger or transfer;
   2. (ii) Any change in the rate of employer contributions that has been negotiated (whether or not in effect); and
   3. (iii) Any trend of changing contribution base units over the preceding five plan years or other period of time that can be demonstrated to be more appropriate.
2. (2) Expected normal costs must be determined under the funding method and assumptions expected to be used by the plan actuary for purposes of determining the minimum funding requirement under section 431 of the Code. If an aggregate funding method is used for the plan, normal costs must be determined under the entry age normal method.
3. (3) Expected benefit payments must be determined by assuming that current benefits remain in effect and that all scheduled increases in benefits occur.
4. (4) The plan's expected fair market value of assets immediately after the merger or transfer must be based on the most recent data available immediately before the date on which the notice is filed.
5. (5) Expected investment earnings must be determined using the same interest assumption to be used for determining the minimum funding requirement under section 431 of the Code.
6. (6) Expected expenses must be determined using expenses in the last plan year ending before the notice is filed, adjusted to reflect any anticipated changes.
7. (7) Expected plan assets for a plan year must be determined by adjusting the most current data on the plan's fair market value of assets to reflect expected contributions, investment earnings, benefit payments and expenses for each plan year between the date of the most current data and the beginning of the plan year for which expected assets are being determined.