CFR›Title 29›Subtitle B›Chapter XL›Part 4050›Subpart D ContainsSections 4050.401–4050.407CorpusDaily eCFRDisplayed edition2026-05-07Last updated2026-05-07 Subpart D—Multiemployer Plans Covered by Title IV Sections 4050.401 § 4050.401 Purpose and scope. 4050.402 § 4050.402 Definitions. 4050.403 § 4050.403 Duties of plan sponsor. 4050.404 § 4050.404 Diligent search. 4050.405 § 4050.405 Filing with PBGC. 4050.406 § 4050.406 Missing participant benefits. 4050.407 § 4050.407 PBGC discretion. Previous C Subpart C—Certain Defined Benefit Plans Not Covered by Title IV