Mich. Comp. Laws § 423.22

Sec. 22. (1) It shall be unlawful for an employer to engage in a lockout or for a labor organization to engage in or instigate a strike without first having served notice as required in section 9. (2) It shall be unlawful for any individual to instigate a lockout or strike that is unlawful under this section. (3) Any person may pursue any appropriate legal or equitable remedy or other relief in any circuit court having jurisdiction with respect to any act or conduct in violation of any of the provisions of this act, except subsection (1) and sections 14(4), 16, and 17a. The existence of a criminal penalty with respect to any such act or conduct does not preclude appropriate equitable relief.