I can't say I've ever seen this in a contract, but I have seen clauses relating to "conflict" with the employer's interests or "interference" with the execution of the employee's duties.Most job contracts that I've seen state that you shouldn't have any other employment or should notify the company if you do...
Thanks for your replies. Turned out l got it a little wrong. What he really wants to do is work his "Full Time" job during the week and get a "Part Time" job for the weekend. He's just a little concerned as to whether or not he can do this. l m not sure myself if this is allowed, hence my throwing it open for suggestions/opinions.