Compiled Laws, Chapter 168. Michigan Election Law § 168.713

Sec. 713. The county board of election commissioners shall cause the ballots required for any regular or special election or official primary election in the county, wrapped and tied as required by this act, to be delivered to the county clerk at the earliest possible time after the approval of the proof of the ballots, and absent voter ballots shall be delivered to the county clerk at least 47 days before any election or primary election. All other ballots and election supplies shall be delivered to the county clerk at least 12 days before any election or primary election.