49 CFR 821.6 - Appearances and rights of witnesses.
(a) Any party to a proceeding may appear and be heard in person, or by an attorney or other representative designated by that party. Upon hearing, and for good cause shown, the Board may suspend or bar any person from practicing before it.
(b) Any person appearing in any proceeding governed by this part may be accompanied, represented and advised, and may be examined by, his or her own counsel or representative.
(c) Any person who submits data or evidence in a proceeding governed by this part may, by timely request, procure a copy of any document submitted by him or her, or a copy of any transcript made of his or her testimony, on payment of reasonable costs. Original documents, data or evidence may be retained by a party upon permission of the law judge or the Board, upon substitution of a copy thereof.
(d) Any party to a proceeding who is represented by an attorney or representative shall, in a separate written document, notify the Board of the name, address and telephone number of that attorney or representative. In the event of a change in representation or a withdrawal of representation, the party shall immediately, in a separate written document, notify the Board (in the manner provided in § 821.7) and the other parties to the proceeding (pursuant to § 821.8), before the new attorney or representative may participate in the proceeding in any way. Parties, and their attorneys and representatives, must notify the Board immediately of any changes in their contact information.