29 C.F.R. § 4003.53
Where to file.
CFR 2003 annual edition (revised as of 2003-07-01) · in effect Jul 1, 1997 to Jul 1, 2004
An appeal or a request for an extension of time to appeal shall be submitted to the Appeals Board, Pension Benefit Guaranty Corporation, 1200 K Street NW., Washington, DC 20005-4026.