(a) At their own request. An Administrative Judge may withdraw from a voluntary decisional proceeding when they consider themselves to be disqualified on the grounds of personal bias, conflict of interest, or similar bases. In such event the Administrative Judge shall immediately notify the Commission and each of the parties of the withdrawal and of the basis for such action.

(b) Upon the request of a party. Any party may request an Administrative Judge to disqualify themselves on the grounds of personal bias, conflict of interest, or similar bases. Interlocutory review of an adverse ruling by the Administrative Judge may be sought without certification of the matter by the Administrative Judge only in accordance with the procedures set forth in § 12.309.