1 If you are 15 years you can work up to a maximum of 8 hours per week. 2  If you are 15 or over you can take up work experience up to 40 hours per week, provided it is not harmful to your 'safety, health or development'.he maximum average working week is 48 hours. This does not mean that it is prohibited to work more than these hours in any week, nor does it mean that one can stop work when you have worked 48 hours in a week.