This document makes changes to the mortality assumptions under parts 4050 (Missing Participants) and 4281 (Duties of Plan Sponsor Following Mass Withdrawal) of PBGC's regulations. In a final rule published in the Federal Register on December 2, 2005, PBGC amended part 4044 (Allocation of Assets in Singleemployer Plans) of its regulations to update

PENSION BENEFIT GUARANTY CORPORATION : Pension Benefit Guaranty Corporation

This proposed rule is a companion to PBGC's direct final rule (published today in the ``Rules and Regulations'' section of the Federal Register) making changes to the mortality assumptions under parts 4050 (Missing Participants) and 4281 (Duties of Plan Sponsor Following Mass Withdrawal) of its regulations. PBGC is making these changes as a direct

PENSION BENEFIT GUARANTY CORPORATION : Pension Benefit Guaranty Corporation