CFR > Title 29 - Labor > SUBTITLE B—Regulations Relating to Labor > CHAPTER XL—PENSION BENEFIT GUARANTY CORPORATION (parts 4000 to 4907) > SUBCHAPTER J—INSOLVENCY, REORGANIZATION, TERMINATION, AND OTHER RULES APPLICABLE TO MULTIEMPLOYER PLANS (parts 4231 to 4281) > PART 4281—DUTIES OF PLAN SPONSOR FOLLOWING MASS WITHDRAWAL > SUBPART B—Valuation of Plan Benefits and Plan Assets (§4281.11 to §4281.18) > 4281.11—Valuation dates.

4281.11—Valuation dates.

(a) Annual valuations of mass-withdrawal-terminated plans. The valuation dates for the annual valuation required under section 4281(b) of ERISA shall be the last day of the plan year in which the plan terminates and the last day of each plan year thereafter.
(b) Valuations related to mass withdrawal reallocation liability. The valuation date for determining the value of unfunded vested benefits (for purposes of allocation) under section 4219(c)(1)(D) of ERISA shall be—
(1) If the plan terminates by mass withdrawal, the last day of the plan year in which the plan terminates; or
(2) If substantially all the employers withdraw from the plan pursuant to an agreement or arrangement to withdraw from the plan, the last day of the plan year as of which substantially all employers have withdrawn from the plan pursuant to the agreement or arrangement.