++++ 1 . ACTION FOR FAILURE BY A MEMBER STATE TO FULFIL ITS OBLIGATIONS - SUBJECT-MATTER OF THE ACTION - ESTABLISHED BY THE REASONED OPINION - PERIOD GRANTED TO THE MEMBER STATE FOR COMPLIANCE - SUBSEQUENT COMPLIANCE WITH ITS OBLIGATIONS - INTEREST IN PURSUING THE ACTION - POSSIBLE LIABILITY OF THE MEMBER STATE ( EEC TREATY, ART . 169 ) 2 . MEMBER STATES - OBLIGATIONS - COMMISSION' S TASK OF SUPERVISION - MEMBER STATES' DUTY TO COOPERATE - COOPERATION IN INVESTIGATIONS CONCERNING AN ALLEGED FAILURE BY A MEMBER STATE TO FULFIL ITS OBLIGATIONS ( EEC TREATY, ART . 5 )