Michigan Compiled Laws, Chapter 211. Taxation of Real and Personal Property § 211.216

Sec. 16. Within 5 days after the final hearing for each local unit, but not later than the second Monday in June, the board shall make a final order approving a maximum tax rate for the purposes of the local unit and shall give written notice of such order to the local unit. A local unit, required by law or city charter, to certify its tax levy for apportionment prior to the second Monday in June may, any such law or charter to the contrary notwithstanding, certify its tax levy on or before the Wednesday following the second Monday in June.