Mich. Comp. Laws § 45.503

Sec. 3. The resolution shall provide that the question shall be submitted to the qualified electors at the next regular primary, presidential primary, or general election occurring not less than 60 days after the adoption of the resolution. If there is not to be a regular primary, presidential primary, or general election in the county within 180 days, the county board of commissioners shall provide in the resolution for a special election on the question.