kuchan get your facts right before trying to come across as intelligent.
Example of opt-out agreement
I [name] agree that I may work for more than an average of 48 hours a week. If I change my mind, I will give my employer [amount of time - up to three months] notice in writing to end this agreement.
Signed……....................................
Dated………..................................
The opt out is to enable you to work as much as you wish. That means NO LIMITS on the hours worked.