Mich. Comp. Laws § 600.549c

Sec. 549c. (1) Until June 30, 2022, the fifty-first judicial circuit consists of the counties of Lake and Mason and has 1 judge. Beginning July 1, 2022, the fifty-first judicial circuit consists of the counties of Mason and Oceana and has 1 judge. (2) The incumbent judge of the fifty-first judicial circuit who resides in Mason County shall become the judge of the reformed fifty-first judicial circuit on July 1, 2022, and shall serve until the term for which he or she was elected in the fifty-first judicial circuit expires.