Code of Criminal Procedure Article 21

A motion to disqualify a judge shall be determined by a ruling rendered by a panel of judges of the court to which the judge so motioned belongs; when a quorum of the panel is not present, such a ruling shall be made by the president of the court; where it is impossible for the president to render such a ruling, it shall be made by the court which is immediately superior to the court to which the judge so motioned belongs.A judge against whom a motion of disqualification is made shall not participate in the ruling specified in the preceding paragraph.If a judge against whom a motion of disqualification is made considers that such a motion is well-grounded, he/she shall thereupon disqualify himself/herself without a ruling being made.