1 . ACTION FOR FAILURE OF A STATE TO FULFIL ITS OBLIGATIONS - PRE-CONTENTIOUS PHASE - FORMAL NOTICE - PURPOSE - ESSENTIAL PROCEDURAL REQUIREMENT ( EEC TREATY , ART . 169 , FIRST PARA .) 2 . ACTION FOR FAILURE OF A STATE TO FULFIL ITS OBLIGATIONS - REASONED OPINION - ORIGINATING APPLICATION - IDENTITY OF GROUNDS AND SUBMISSIONS - CRITERIA FOR ASSESSMENT ( EEC TREATY , ART . 169 , FIRST PARA .) 3 . APPROXIMATION OF LAWS - MEASURING INSTRUMENTS AND METHODS OF METROLOGICAL CONTROL - ELECTRICAL ENERGY METERS - OBLIGATIONS OF MEMBER STATES - LIMITS - OPTIONAL HARMONIZATION ( COUNCIL DIRECTIVES 71/316 , ART . 2 ( 2 ) AND ART . 8 ( 2 ) AND 76/891 , ART . 2 )