Working hours are stated in section 60A of the Employment Act. Under (d), they can be required to work up to (8 hours x 6 days) 48 hours per week.
60A. Hours of work.
(1) Except as hereinafter provided, an employee shall not be required under his contract of service to work:
(a) more than five consecutive hours without a period of leisure of not less than thirty minutes duration;
(b) more than eight hours in one day;
(c ) in excess of a spread over period of ten hours in one day;
(d) more than forty-eight hours in one week:
Yes, you can negotiate with the employer to work on 5 1/2 days per week.