(a) (1) Appellant(s) may once, within time limits for filing set forth in § 41.66 , file a brief and serve the brief on all other parties to the proceeding in accordance with § 1.903 of this title. (2) The brief must be signed by the appellant, or the appellant's duly authorized attorney or agent and must be accompanied by the requisite fee set forth in § 41.20(b)(2) . (b) An appellant's appeal shall stand dismissed upon failure of that appellant to file an appellant's brief, accompanied by the requisite