29 CFR 4041A.11 - Requirement of notice.
(c)When to file.
(2) For a termination that results from a mass withdrawal, the Notice shall be filed with the PBGC within thirty days after the last employer withdrew from the plan or thirty days after the first day of the first plan year for which no employer contributions were required under the plan, whichever is earlier.
(d)How and where to file. Filings to PBGC under this subpart must be submitted in accordance with the rules in subpart A of part 4000 of this chapter. See § 4000.4 of this chapter for information on where to file.