Michigan Compiled Laws, Chapter 600. Revised Judicature Act of 1961 § 600.306

Sec. 306. The supreme court may transfer judges from the circuit court or probate court or may assign judges pursuant to section 23 of article VI of the state constitution of 1963 to the court of appeals to act as temporary judges. The transfer may be made to replace disabled or disqualified judges, or to enlarge the court of appeals temporarily to not more than 48 judges if the business of the court of appeals is considered by the supreme court to warrant it. If the court of appeals sits in panels, the temporary judges may be assigned to any panel. Not more than 1 temporary judge shall be assigned to hear a case. A temporary judge is disqualified from hearing, in the court of appeals, cases tried before him or her in the trial court.