Originally Posted by MrBottomTooth

This is covered in the employment standards act. You have to sign a written agreement stating you don't object to working more than 8 hours. You can change your mind at a later date with 2 weeks notice, and they can't take any form of reprisal against you for it, etc. Plus you still have to get mandatory breaks, time for meals, etc if you do agree to work more than 8 hours. Employers can face fines or even jail time for not complying.