Legally not permitted but if you think that allowing an employee to do six hours over and above the scheduled 8 hours is necessary for the benefit of the organisation, you can do it. But it should not be a regular practice.
Your question is too short and looks vague
Is this an actual problem or have you been given a case study and you are trying to solve it?
I suggest you given the full details and background of the matter if you want a good response on the forum
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