It is the responsibility of the Court of Justice to ensure that the law is observed in the interpretation and application of the Treaties of the European Union and of the provisions laid down by the competent Community institutions. To enable it to carry out that task, the Court has wide jurisdiction to hear various types of action. The Court has competence, inter alia, to rule on applications for annulment or actions for failure to act brought by a Member State or an institution, actions against Member States for failure to fulfil obligations, references for a preliminary ruling and appeals against decisions of the Court of First Instance.