Mich. Comp. Laws § 423.8: Employees; rights.

Sec. 8.

Employees may do any of the following:

(a) Organize together or form, join, or assist in labor organization; engage in lawful concerted activities for the purpose of collective negotiation or bargaining or other mutual aid and protection; or negotiate or bargain collectively with their employers through representatives of their own free choice.

(b) Refrain from any or all of the activities identified in subdivision (a).