Mich. Comp. Laws § 338.1079

Sec. 29. (1) The licensure of private security police and private college security forces shall be administered by the department of state police. The application, qualification, and enforcement provisions under this act apply to private security police and private college security forces except that the administration of those provisions shall be performed by, and the payment of the appropriate fees shall be paid to, the department of state police. The director of the department may jointly promulgate rules with the department of state police under the administrative procedures act of 1969, 1969 PA 306, MCL 24.201 to 24.328, to facilitate the bifurcation of authority described in this subsection. (2) This act does not require licensing of any private security guards employed for the purpose of protecting the property and employees of their employer and generally maintaining security for their employer. However, any person, firm, limited liability company, business organization, educational institution, or corporation maintaining a private security police organization or a private college security force may voluntarily apply for licensure under this act. When a private security police employer or private college security force employer as described in this section provides the employee with a pistol for the purpose of protecting the property of the employer, the pistol shall be considered the property of the employer and the employer shall retain custody of the pistol, except during the actual working hours of the employee. All such private security people shall be subject to the provisions of sections 17(1) and 19(1).