It ruled that a provision in a collective agreement that requires overtime pay to exceed the regular working hours of a full-time employee, regardless of the individual's working hours, was discriminatory to the detriment of part-time employees and therefore void. A standard working time of 8 hours applied in the company in question. The full-time employee who worked more than his standard working time of 8 hours received an overtime bonus. The part-time employee who worked more than their standard working time of (for example) 4 hours did not receive a supplement. As there was no objective reason for this, there was discrimination.