Mich. Comp. Laws § 28.425n

Sec. 5n. (1) This state or a local unit of government of this state shall not prohibit an individual from doing either of the following as a condition for receiving or maintaining any other license or permit authorized by law: (a) Applying for or receiving a license to carry a concealed pistol under this act. (b) Carrying a concealed pistol in compliance with a license issued under this act. (2) Except as provided in subsection (3), an employer shall not prohibit an employee from doing either of the following: (a) Applying for or receiving a license to carry a concealed pistol under this act. (b) Carrying a concealed pistol in compliance with a license issued under this act. This subdivision does not prohibit an employer from prohibiting an employee from carrying a concealed pistol in the course of his or her employment with that employer. (3) A police agency may prohibit an employee of that police agency from carrying a concealed pistol if carrying a concealed pistol would result in increased insurance premiums or a loss or reduction of insurance coverage for that employer.