Michigan Compiled Laws, Chapter 423. Labor Disputes and Employment Relations § 423.241

Sec. 11. Where an employee organization recognized pursuant to Act No. 336 of the Public Acts of 1947,  1 as amended, as the bargaining representative of employees subject to this act, willfully disobeys a lawful order of enforcement by a circuit court pursuant to section 10,  2 or willfully encourages or offers resistance to such order, whether by a strike or otherwise, the punishment for each day that such contempt persists, may be a fine fixed in the discretion of the court in an amount not to exceed $250.00 per day. Where an employer, as that term is defined by Act No. 336 of the Public Acts of 1947, as amended, willfully disobeys a lawful order of enforcement by the circuit court or willfully encourages or offers resistance to such order, the punishment for each day that such contempt persists may be a fine, fixed at the discretion of the court, an amount not to exceed $250.00 per day to be assessed against the employer.