Employment Contract Hours Of Work I Have A Job Whose Contract Of Employment Does Not Specify The Number Of Hours I Must Work. Is This Correct.?

I have a job whose contract of employment does not specify the number of hours I must work. Is this correct.? - employment contract hours of work

The opening times vary. That's good, but with about 60 or even work 70 hours per week is not good, can I choose for DMD, but really only 40 hours, which is working, the secured amount. Ideas?