Missouri constitution
Article III: legislative department
Section 7

(i) Any action expressly or implicitly alleging that a redistricting plan violates this Constitution, federal law, or the United States Constitution shall be filed in the circuit court of Cole County and shall name the body that approved the challenged redistricting plan as a defendant. Only an eligible Missouri voter who sustains an individual injury by virtue of residing in a district that exhibits the alleged violation, and whose injury is remedied by a differently drawn district, shall have standing. If the court renders a judgment in which it finds that a completed redistricting plan exhibits the alleged violation, its judgment shall adjust only those districts, and only those parts of district boundaries, necessary to bring the map into compliance. The supreme court shall have exclusive appellate jurisdiction upon the filing of a notice of appeal within ten days after the judgment has become final.