CFR›Title 29›Subtitle B›Chapter XL›Part 4219 ContainsSubparts A–CCorpusDaily eCFRDisplayed edition2026-04-15Last updated2026-04-15 PART 4219—NOTICE, COLLECTION, AND REDETERMINATION OF WITHDRAWAL LIABILITY Subparts A Subpart A—General Sections 4219.1–4219.3 B Subpart B—Redetermination of Withdrawal Liability Upon Mass Withdrawal Sections 4219.11–4219.19 C Subpart C—Overdue, Defaulted, and Overpaid Withdrawal Liability Sections 4219.31–4219.33 Authority29 U.S.C. 1302(b)(3) and 1399(c)(6).Source61 FR 34102, July 1, 1996, unless otherwise noted. Previous 4211 Part 4211—Allocating Unfunded Vested Benefits to Withdrawing Employers Next 4220 Part 4220—Procedures for PBGC Approval of Plan Amendments