Mich. Comp. Laws § 38.172: Teachers; waiver of rights in contracts prohibited.

Sec. 2.

No teacher may waive any rights and privileges under this act in any contract or agreement made with a controlling board. In the event that any section or sections of a contract or agreement entered into between a teacher and a controlling board make continuance of employment of such teacher contingent upon certain conditions which may be interpreted as contrary to the reasonable and just causes for dismissals, provided by this act, such section or sections of a contract or agreement shall be invalid and of no effect in relation to determination of continuance of employment of such teacher.