Mich. Comp. Laws § 600.8112

Sec. 8112. (1) Except as provided in subsection (2), the second district consists of the counties of Lenawee and Hillsdale, is a district of the first class, and is divided into the following election divisions: (a) The first division consists of the county of Lenawee and has 2 judges. (b) The second division consists of the county of Hillsdale and has 1 judge. (2) Effective January 1, 1999, if the county of Lenawee approves the creation of the second-a district pursuant to law, and if the county of Hillsdale approves the creation of the second-b district pursuant to law, both of the following apply: (a) The second-a district consists of the county of Lenawee, is a district of the first class, and has 2 judges. (b) The second-b district consists of the county of Hillsdale, is a district of the first class, and has 1 judge.