Michigan Compiled Laws, Chapter 600. Revised Judicature Act of 1961 § 600.4401

Sec. 4401. (1) An action for mandamus against a state officer shall be commenced in the court of appeals, or in the circuit court in the county in which venue is proper or in Ingham county, at the option of the party commencing the action.

(2) The supreme court may provide by rule for the joinder of claims or consolidation of actions in the court of appeals or the circuit court if those claims or actions include a prayer for mandamus against a state officer and arise out of the same circumstances or raise a similar issue of law.

(3) The supreme court may provide by rule for the referral of an action from the court of appeals to the circuit court to determine and report its findings of fact or to hear and decide the action if substantial fact finding is necessary to determine the applicability of mandamus relief.