Mich. Comp. Laws § 338.1053

Sec. 3. (1) Unless licensed under this act, a sole proprietorship, firm, company, partnership, limited liability company, or corporation shall not engage in the business of security alarm system contractor, private security guard, private security police, private college security force, patrol service, or an agency furnishing those services. A person, firm, company, partnership, limited liability company, or corporation shall not advertise its business to be that of security alarm system contractor, security alarm system agent, private security guard agency, or an agency furnishing those services without having first obtained from the department a license to do so for each office and branch office to be owned, conducted, managed, or maintained for the conduct of that business. (2) A person shall not sell, install, operate, adjust, arrange for, or contract to provide a device which upon activation, either mechanically, electronically, or by any other means, initiates the automatic calling or dialing of, or makes a connection directly to, a telephone assigned to a public service, utility, or police agency, for the purpose of delivering a recorded message, without first receiving written permission from that service, utility, or agency. (3) A person who violates this section is guilty of a felony punishable by imprisonment for not more than 4 years or a fine of not more than $1,000.00, or both.