evidence: The Court of Justice in the legal order of the European Union [...] The Court of Justice cooperates with all the courts of the Member States, which are the ordinary courts in matters of European Union law. To ensure the effective and uniform application of European Union legislation and to prevent divergent interpretations, the national courts may, and sometimes must, refer to the Court of Justice and ask it to clarify a point concerning the interpretation of EU law, so that they may ascertain, for example, whether their national legislation complies with that law. A request for a preliminary ruling may also seek the review of the validity of an act of EU law. [...] The Court of Justice of the European Union is the judicial institution of the European Union and of the European Atomic Energy Community (Euratom). It is made up of two courts: the Court of Justice and the General Court. Their primary task is to examine the legality of EU measures and ensure the uniform interpretation and application of EU law.