The inclusion of a non-competition clause in a Dutch fixed-term employment agreement concluded for a maximum duration of six months is not permitted. This is indeed possible in fixed-term employment contracts lasting longer than six months, but only if the employer can demonstrate that a compelling business or service interest exists for the inclusion of such a clause. Justification of this interest is required in the employment agreement. Without justification, the clause is not valid. For permanent employment contracts, the requirement of justifying a compelling business or service interest in the employment agreement does not apply.