Michigan Compiled Laws, Chapter 409. Youth Employment § 409.107

(a) Poor school attendance, characterized by repeated erratic or unexcused absences, which results in consistent performance of school work at a level lower than that which preceded the minor's employment. The work permit may be revoked only after the permit has been suspended. The suspension must take place upon notice to the minor and the employer, and an opportunity to correct the deficiency is afforded. The suspension must not exceed 30 days after date of notification.

(b) The minor's employment is in violation of federal or state law or of a regulation or rule promulgated under federal or state law, and the issuing officer or the director, as applicable, is informed of the violation.