++++ 1 . Action for failure by a Member State to fulfil its obligations - Proof of failure - Burden of proof on Commission - Production of evidence showing failure - Incumbent on Member State concerned to refute evidence ( EEC Treaty, Art . 169 ) 2 . Member States - Obligations - Commission' s duty to ensure fulfilment - Duty of the Member States - Duty to cooperate with inquiries and proceedings before the Court relating to failure by a State to fulfil obligations ( EEC Treaty, Arts 5, 155, 164 and 169 )