Mich. Comp. Laws § 774.26

Sec. 26. All fines and costs imposed by a municipal court, for a violation of state law shall be received by the court and paid over to the county treasurer on or before the last day of the month following receipt of the fine or costs. The county treasurer shall reimburse the municipal court for the court's lawful fees within 15 days after auditing pursuant to law, and the fines shall be distributed as prescribed by law.