Overtime over 8 hours

Our company's policy is to pay overtime for time worked over the normal eight hours of working time for a normal working day. Our question is if an employee works 6 hours on Monday and wishes to make up that time Tuesday and work 10 hours, do the 2 hours extra worked on Tuesday have to be paid at overtime rate? Can the employee sign a waiver stating they agree to make up time missed on a straight time basis? Thanks!
Comments