A person may file any document or make any appearance that is required or permitted by this part on his or her own behalf or he or she may designate a representative. When the representative is not an attorney-at-law, a notarized power of attorney, signed by the person making the designation, which authorizes the representation and specifies the scope of representation must be filed with PBGC in accordance with § 4003.9(b) of this part.
29 C.F.R. §4003.6