Mich. Comp. Laws § 289.3125

Sec. 3125. (1) Subject to subsection (3), a local health department, with the approval of the director and based on criteria developed by the department in consultation with local health departments, may reduce the frequency of evaluations of individual food service establishments if the local health department determines that a reduced evaluation frequency will not adversely affect food safety practices within the food service establishment. (2) A food service establishment which, upon investigation, is implicated in a foodborne illness outbreak or chemical intoxication shall be evaluated by the director for compliance within the next 12 months. (3) A local health department shall not reduce the minimum frequency of evaluations of any food service establishment to less than that described in section 3123 unless approved by the department.