Mich. Comp. Laws § 19.145

Sec. 5. Each board or department prescribed in section 1 shall have all rules and regulations which are made or prescribed, entered in convenient form, in a record book kept in the respective office of the board or department, for that purpose and posted in not less than 3 conspicuous places on the premises subject to regulation. The prosecuting attorney of the county in which the offense is committed shall prosecute offenders against this act or a rule or regulation made or prescribed by a board or department, under this act.