(a) Petitioner. A petitioner may appear and be heard in person or by attorney. An attorney may practice before the Postal Service in accordance with applicable rules issued by the Judicial Officer (see Part 951 of this chapter). When a petitioner is represented by an attorney, all pleadings and other papers to be served on petitioner after entry of the attorney's appearance shall be mailed to the attorney. A petitioner must promptly file notice of any change of attorney.

(b) Postal Service. The Postal Service will be represented by its General Counsel or any attorney designated by the General Counsel.