Mich. Comp. Laws § 750.45: Open air assemblies; operation of aircraft; altitude.

Sec. 45.

A person who operates an aircraft over open air assemblies of people at a height of less than 1,500 feet from the ground is guilty of a misdemeanor punishable by imprisonment for not more than 1 year or a fine of not more than $1,000.00. This section does not apply to groups assembled for the purpose of witnessing aerial exhibitions and stunt flying, nor to groups assembled at a flying field.