Mich. Comp. Laws § 560.118: Preliminary plat; health department's approval or rejection.

Sec. 118.

(1) The proprietor shall submit 3 copies of the preliminary plat to the health department having jurisdiction, if public water and public sewers are not available and accessible to the land proposed to be subdivided.

(2) The health department, within 30 days after receipt of the preliminary plat, shall approve it, approve it subject to conditions, or reject all or any portion of the proposed subdivision that is not suitable. If the preliminary plat is approved, the health department shall note its approval on the copy to be returned to the proprietor. If all or any portion of the preliminary plat is approved subject to conditions or is rejected, the health department shall give its reasons for rejection and requirements for approval in writing to the proprietor, the governing body, and each of the other officers and agencies to which the proprietor was required to submit the preliminary plat under sections 113 to 115 and 117 to 119.