Daily Limit. The maximum number of hours most employees can be required to work in a day is eight hours or the number of hours in an established regular workday, if it is longer than eight hours.The only way the daily maximum can be exceeded is by written agreement between the employee and employer.he maximum number of hours most employees can be required to work in a week is 48 hours. The weekly maximum can be exceeded only if there is a written agreement between the employee and employer and the employer has received the approval of the Director of Employment Standards.