Mich. Comp. Laws § 750.153

Sec. 153. The carrying into effect, in whole or in part, of any such illegal contract, agreement, understanding, or combination as mentioned in the first section of this chapter and every act that shall be done for that purpose by any of the parties or through their agency or the agency of any 1 of them, constitutes a misdemeanor punishable by imprisonment for not more than 1 year or a fine of not more than $1,000.00.