Michigan Compiled Laws, Chapter 259. Aviation § 259.624

Sec. 4. (1) The legislative bodies of the counties, cities, incorporated villages, and townships creating the airport authority may raise by an ad valorem property tax, to be levied on the taxable property within their respective jurisdictions, a sum of money to be used to assist in the planning, promoting, acquiring, constructing, improving, enlarging, extending, owning, maintaining, and operating the landing, navigational, and building facilities necessary thereto of the community airport authorized by this act. The tax shall not exceed 1 mill on each dollar of the state equalized valuation of each county, city, incorporated village, or township. In computing the total tax to be levied, the assessed valuation of any unit of government joining the airport authority shall not be used more than once.

(2) The ad valorem property tax authorized by this section shall not be levied unless approved by the majority of the qualified electors of the member local unit voting thereon. A tax approved pursuant to this subsection may be levied until the local unit is released from membership in the authority or until the authority is dissolved, whichever occurs first. However, this subsection shall not be considered to prohibit the use of revenues from ad valorem property tax levies of mills within the member local unit's charter or statutory limitation to pay an appropriation required by the airport authority.