74 pages. "[PBGC] is amending its regulations on Allocating Unfunded Vested Benefits to Withdrawing Employers and Notice, Collection, and Redetermination of Withdrawal Liability. The amendments implement statutory provisions affecting the determination of a withdrawing employer's liability under a multiemployer plan and annual withdrawal liability payment amount when the plan has had benefit reductions, benefit suspensions, surcharges, or contribution increases that must be disregarded. The amendments also provide simplified withdrawal liability calculation methods."