Mich. Comp. Laws § 484.1304

Sec. 304. A resolution adopting a tentative 9-1-1 service plan under section 303 must specify a time, date, and place for the public hearing to be held on the tentative 9-1-1 service plan under section 309. The date of the public hearing must be not less than 90 days after the date of the adoption of the resolution authorized by this section.