A Board or disciplinary panel member may not participate in an investigation or a proceeding in which the impartiality of the Board or disciplinary panel member might reasonably be questioned, including but not limited to proceedings and investigations in which the Board or disciplinary panel member has or appears to have: A personal bias or prejudice concerning a party; or Personal knowledge of disputed evidentiary facts concerning a proceeding. The recusal shall be stated on the record. In a hearing before the Board or disciplinary panel, the parties may waive the recusal.