CFR›Title 29›Subtitle B›Chapter XL›Part 4231 ContainsSubparts A–BCorpusDaily eCFRDisplayed edition2026-05-07Last updated2026-05-07 PART 4231—MERGERS AND TRANSFERS BETWEEN MULTIEMPLOYER PLANS Subparts A Subpart A—General Provisions Sections 4231.1–4231.11 B Subpart B—Additional Rules for Facilitated Mergers Sections 4231.12–4231.18 Authority29 U.S.C. 1302(b)(3)Source83 FR 46653, Sept. 14, 2018, unless otherwise noted. Previous 4221 Part 4221—Arbitration of Disputes in Multiemployer Plans Next 4233 Part 4233—Partitions of Eligible Multiemployer Plans