CFR›Title 29›Subtitle B›Chapter XL›Part 4281 ContainsSubparts A–DCorpusDaily eCFRDisplayed edition2026-04-15Last updated2026-04-15 PART 4281—DUTIES OF PLAN SPONSOR FOLLOWING MASS WITHDRAWAL Subparts A Subpart A—General Provisions Sections 4281.1–4281.3 B Subpart B—Valuation of Plan Benefits and Plan Assets Sections 4281.11–4281.18 C Subpart C—Benefit Reductions Sections 4281.31–4281.33 D Subpart D—Benefit Suspensions Sections 4281.41–4281.47 Authority29 U.S.C. 1302(b)(3), 1341(a), 1399(c)(1)(D), 1431, and 1441.Source61 FR 34118, July 1, 1996, unless otherwise noted. Previous 4262 Part 4262—Special Financial Assistance by PBGC Next 4302 Part 4302—Penalties for Failure to Provide Certain Multiemployer Plan Notices