Mich. Comp. Laws § 259.434: Airport hazard area; definition.

Sec. 4.

The term "airport hazard area", when used in this act means any area of land or water, or both, upon which an airport hazard might be established if not prevented as provided in this act, including any such area which has been declared to be an "airport hazard area" by the Michigan aeronautics commission in connection with any airport approach plan adopted by said commission.