1 . MEMBER STATES - OBLIGATIONS - IMPLEMENTATION OF DIRECTIVES - PARTIAL IMPLEMENTATION - FAILURE TO FULFIL ( EEC TREATY , ART . 169 ) 2 . MEASURES ADOPTED BY INSTITUTIONS - LEGAL NATURE - DECISIONS AND DIRECTIVES - TREATMENT AS INTERNATIONAL AGREEMENT - NOT PERMISSIBLE ( EEC TREATY , ART . 189 ) 3 . HARMONIZATION OF LAWS - PROTECTION OF THE ENVIRONMENT - LEGAL BASIS OF DIRECTIVES - ARTICLE 100 OF THE TREATY - PERMISSIBILITY ( EEC TREATY , ART . 100 ) 4 . MEMBER STATES - OBLIGATIONS - IMPLEMENTATION OF DIRECTIVES - FAILURE TO FULFIL - JUSTIFICATION - NOT PERMISSIBLE ( EEC TREATY , ART . 169 )