Mich. Comp. Laws § 252.303: Purpose.

Sec. 3.

To improve and enhance scenic beauty consistent with section 131 of title 23 of the United States Code, 23 USC 131, and to limit and reduce the illegal possession and use of tobacco by minors, the legislature finds it appropriate to regulate and control outdoor advertising and outdoor advertising as it pertains to tobacco adjacent to the streets, roads, highways, and freeways within this state and that outdoor advertising is a legitimate accessory commercial use of private property, is an integral part of the marketing function and an established segment of the economy of this state.