(a) General. A notice of termination must be filed with PBGC by a multiemployer plan when the plan has terminated as described in section 4041A(a) of ERISA.

(b) Who must file. The plan sponsor or a duly authorized representative acting on behalf of the plan sponsor must sign and file the notice.

(c) When to file. (1) For a termination pursuant to a plan amendment, the notice must be filed with PBGC within thirty days after the amendment is adopted or effective, whichever is later.

(2) For a termination that results from a mass withdrawal, the notice must be filed with 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 with 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.