++++ 1 . ACTION FOR FAILURE OF A MEMBER STATE TO FULFIL ITS OBLIGATIONS - MEASURES ADOPTED BY THE MEMBER STATE IN QUESTION AFTER COMMENCEMENT OF THE ACTION - IRRELEVANT ( EEC TREATY, ART . 169 ) 2 . ACTS OF THE INSTITUTIONS - DIRECTIVES - IMPLEMENTATION BY MEMBER STATES - REQUIREMENT OF LEGAL CERTAINTY ( EEC TREATY, THIRD PARAGRAPH OF ART . 189 )