There are regulations concerning rest periods and break times for the safety and well-being of the employee.
Employees are allowed at least 11 hours of daily rest per 24-hour period. They must also receive one 24-hour period of rest per week, which needs to follow an 11-hour rest period.
During the work day, your staff must get a 15-minute rest break if they work 4 ½ hours. If working 6 hours, they must get 30-minutes of rest.