ACTION FOR FAILURE TO ACT - NATURAL AND LEGAL PERSONS - OMISSIONS IN RESPECT OF WHICH AN ACTION MAY BE BROUGHT ( EEC TREATY , THIRD PARA . OF ART . 175 ) ANNULMENT OF MEASURES - MEASURES IN RESPECT OF WHICH AN ACTION MAY BE BROUGHT - MEASURES HAVING LEGAL EFFECTS ( EEC TREATY , SECOND PARA . OF ART . 173 )