Mich. Comp. Laws § 125.2487

Sec. 37. The county within which the authority district is located or a township in which all or part of the authority district is located may charge the authority, and the authority shall reimburse the county or township, for expenses reasonably incurred by the county or township in satisfying the requirements of this act. If requested by the county or township, the authority shall enter into a contract with the county or township for and limited to the reimbursement of such expenses.