Mich. Comp. Laws § 560.171

Sec. 171. Within 15 days after receipt of the plat the department of labor and economic growth shall review the plat and do 1 of the following: (a) If the plat conforms to all of the provisions of this act, procure at least 4 exact copies at the surveyor's expense, approve the plat, and send the original final plat to the register of deeds for recording. (b) Reject the plat and notify the proprietor in writing of the reasons.