Michigan Compiled Laws, Chapter 600. Revised Judicature Act of 1961 § 600.8152

(a) Until the date determined under subdivision (b), this district has 1 judge.

(b) Beginning on the date on which a vacancy occurs in the office of district judge in the eighty-seventh-A district or the beginning date of the term for which the incumbent district judge in the eighty-seventh-A district no longer seeks election or reelection to that office, whichever is earlier, the eighty-seventh-A district consists of the county of Otsego and is a district of the first class. Under section 810a,  1 the probate judge for the county of Otsego shall serve as judge of the eighty-seventh-A district.