Code of Federal Regulations Title 49. Transportation § 49.1103.4 Initial appearances

(a) Entering the practitioner's name as the representative of an applicant in the appropriate space on an application form;

(b) Signing any complaint, petition, protest, reply or other pleading with a designation following the practitioner's signature that he is the representative of a party;

(c) Entering an appearance at any hearing on the form provided;  or

(d) Filing a letter with the Chief, Section of Administration, Office of Proceedings, Surface Transportation Board stating that practitioner is authorized to represent a party. The party represented, their address, and the docket number of the proceeding must also be identified at the time of the initial appearance.