Mich. Comp. Laws § 125.3505

Sec. 505. (1) To ensure compliance with a zoning ordinance and any conditions imposed under a zoning ordinance, a local unit of government may require that a cash deposit, certified check, irrevocable letter of credit, or surety bond acceptable to the local unit of government covering the estimated cost of improvements be deposited with the clerk of the legislative body to insure faithful completion of the improvements. The performance guarantee shall be deposited at the time of the issuance of the permit authorizing the activity or project. The local unit of government may not require the deposit of the performance guarantee until it is prepared to issue the permit. The local unit of government shall establish procedures by which a rebate of any cash deposits in reasonable proportion to the ratio of work completed on the required improvements shall be made as work progresses. (2) This section shall not be applicable to improvements for which a cash deposit, certified check, irrevocable bank letter of credit, or surety bond has been deposited under the land division act, 1967 PA 288, MCL 560.101 to 560.293.