1 . MEMBER STATES - OBLIGATIONS - IMPLEMENTATION OF DIRECTIVES - ABSENCE - JUSTIFICATION ON GROUNDS BASED ON THE INTERNAL LEGAL SYSTEM - NOT POSSIBLE ( EEC TREATY , ARTS . 169 AND 189 , THIRD PARAGRAPH ) 2 . MEASURES ADOPTED BY INSTITUTIONS - DIRECTIVES - IMPLEMENTATION BY THE MEMBER STATES - IMPLEMENTATION BY MEANS OF ADMINISTRATIVE PRACTICES - NOT SUFFICIENT ( EEC TREATY , ART . 189 , THIRD PARAGRAPH )