Another version:
Here.
I have no idea which of these is final, or the most final.
Here's the wording of the union escape clause in this version:
"Any waiver by an individual of any of the provisions of this act shall be deemed contrary to public policy and shall be void and unenforceable, except that employees are not barred from entering into a written valid collective bargaining agreement waiving provisions of this act if such waiver is set forth in clear and unambiguous terms."