The term appellant means a party that has filed an appeal for resolution by the Board. An individual appellant may appear before the Board in his or her own behalf, a corporation may appear before the Board by an officer thereof, a partnership or joint venture may appear before the Board by a member thereof. Any appellant may appear before the Board by an attorney at law duly licensed in any state, commonwealth, territory of the United States, or in the District of Columbia. An attorney representing an appellant shall register in the electronic filing system, and file a notice of appearance. The notice of appearance must include an email address, mailing address, telephone number, fax number, and a jurisdiction in which the attorney is licensed to practice law.