Michigan Compiled Laws, Chapter 3. Federal and Interstate Relations § 3.71

Sec. 1. The supreme court has original and exclusive state jurisdiction to hear and decide all cases and controversies in Michigan's 1 court of justice involving a congressional redistricting plan. A case or controversy in Michigan's 1 court of justice involving a congressional redistricting plan shall not be commenced in or heard by the state court of appeals or any state trial court. If a case or controversy involves a congressional redistricting plan but an application or petition for review was not filed under section 2 or 3,  1 the supreme court may, but is not obligated to, undertake all or a portion of the procedures described in section 4.  2