Part 4203 - Extension of Special Withdrawal Liability Rules

Part 4204 - Variances for Sale of Assets

Part 4206 - Adjustment of Liability for a Withdrawal Subsequent to a Partial Withdrawal

Part 4207 - Reduction or Waiver of Complete Withdrawal Liability

Part 4208 - Reduction or Waiver of Partial Withdrawal Liability

Part 4211 - Allocating Unfunded Vested Benefits to Withdrawing Employers

Part 4219 - Notice, Collection, and Redetermination of Withdrawal Liability

Part 4220 - Procedures for PBGC Approval of Plan Amendments

Part 4221 - Arbitration of Disputes in Multiemployer Plans