14 CFR § 1264.115 - Disqualification of reviewing official or presiding officer.
(b) A party may file with the presiding officer a motion for disqualification of a reviewing official or a presiding officer. Such motion shall be accompanied by an affidavit alleging personal bias or other reason for disqualification.
(c) Such motion and affidavit shall be filed promptly upon the party's discovery of reasons for disqualification, or such objections shall be deemed waived.
(d) Such affidavit shall state specific facts that support the party's belief that personal bias or other reason for disqualification exists and the time and circumstances of the party's discovery of such facts. It shall be accompanied by a certificate of the representative of record that it is made in good faith.
(e) Upon the filing of such a motion and affidavit, the presiding officer shall proceed no further in the case until the matter of disqualification is resolved in accordance with paragraph (f) of this section.