1 . SOCIAL POLICY - MEN AND WOMEN - EQUAL PAY - PRINCIPLE - HOURLY RATE OF PAY FOR PART-TIME WORK LOWER THAN THAT FOR FULL-TIME WORK - PERMISSIBILITY - CONDITIONS - INDIRECT DISCRIMINATION AGAINST FEMALE EMPLOYEES - PROHIBITION - NATIONAL COURT TO DECIDE ( EEC TREATY , ART . 119 ) 2 . SOCIAL POLICY - MEN AND WOMEN - EQUAL PAY - PRINCIPLE - DIRECT EFFECT - HOURLY RATE OF PAY FOR PART-TIME WORK LOWER THAN THAT FOR FULL-TIME WORK - EXISTENCE OF DISCRIMINATION BASED ON SEX TO BE ESTABLISHED BY THE NATIONAL COURTS ( EEC TREATY , ART . 119 ) 3 . SOCIAL POLICY - MEN AND WOMEN - EQUAL PAY - PRINCIPLE - SAME CONTENT AND SCOPE IN ARTICLE 119 OF THE TREATY AND IN DIRECTIVE 75/117/EEC ( EEC TREATY , ART . 119 ; COUNCIL DIRECTIVE 75/117/EEC , ART . 1 )