Mich. Comp. Laws § 600.8120

Sec. 8120. (1) The fourteenth district consists of the county of Washtenaw except the city of Ann Arbor, is a district of the second class, and has 4 judges. If the township of Ypsilanti approves the formation of the fourteenth-b district and district judgeship subject to section 8176, effective on January 1, 1985 and through December 31, 1986, the fourteenth-a district consists of the county of Washtenaw, except the city of Ann Arbor and the township of Ypsilanti, is a district of the second class, and has 4 judges. Effective on January 1, 1987, the fourteenth-a district consists of the county of Washtenaw, except the city of Ann Arbor and the township of Ypsilanti, is a district of the second class, and has 3 judges. (2) If the township of Ypsilanti approves the formation of the fourteenth-b district and district judgeship subject to section 8176, effective on January 1, 1985, the fourteenth-b district consists of the township of Ypsilanti, is a district of the third class, and has 1 judge. (3) The fifteenth district consists of the city of Ann Arbor, is a district of the third class, and has 3 judges. Subject to section 8175, this district may have 1 additional judge effective January 1, 1993.