20 CFR 404.1710: Authority of a representative.

(a) What a representative may do. Your representative may, on your behalf—

(1) Obtain information about your claim to the same extent that you are able to do;

(2) Submit evidence;

(3) Make statements about facts and law; and

(4) Make any request or give any notice about the proceedings before us.

(b) What a representative may not do. A representative may not sign an application on behalf of a claimant for rights or benefits under title II of the Act unless authorized to do so under § 404.612.