29 CFR § 4231.5 - Valuation requirement.

The actuarial valuation requirement under section 4231(b)(4) of ERISA and § 4231.3(a)(2) is satisfied if an actuarial valuation has been performed for the plan based on the plan's assets and liabilities as of a date not earlier than the first day of the last plan year ending before the proposed effective date of the transaction. If the actuarial valuation required under this section is not complete when the notice of merger or transfer is filed, the plan sponsor may provide the most recent actuarial valuation for the plan with the notice, and the actuarial valuation required under this section when complete. For a significantly affected plan involved in a transfer (other than a plan that is a significantly affected plan only because the transfer involves a plan that has terminated by mass withdrawal under section 4041A(a)(2) of ERISA), the valuation must separately identify assets, contributions, and liabilities being transferred and must be based on the actuarial assumptions and methods that are expected to be used for the plan for the first plan year beginning after the transfer.