How Made. An appearance may be made as follows: By filing a notice of appeal or any pleading; By filing with the Clerk of the Appeals Board a written notice of appearance; Orally, in any proceeding before the Appeals Board. Appearance of Out-of-State Attorney. An out-of-State attorney may enter the out-of-State attorney’s appearance and participate in an action only after having been admitted in accordance with Md. Rule 19-217 (Special Admission of Out-of-State Attorneys Pro Hoc Vice). Once so admitted, the attorney’s appearance is limited by the restriction of that Rule and Regulation .03 of this chapter.