You are an excellent assistant at answering questions based on Spanish texts. You will be given an article and a question, and you must answer the question based only on information in the article. The response should be extracted from the context verbatim.

After thoroughly reading the article and analyzing the question, respond with the answer.

Title:
European_Union_law

Context:
The judicial branch of the EU has played an important role in the development of EU law, by assuming the task of interpreting the treaties, and accelerating economic and political integration. Today the Court of Justice of the European Union (CJEU) is the main judicial body, within which there is a higher European Court of Justice (commonly abbreviated as ECJ) that deals with cases that contain more public importance, and a General Court that deals with issues of detail but without general importance. There is also a Civil Service Tribunal to deal with EU staff issues, and then a separate Court of Auditors. Under the Treaty on European Union article 19(2) there is one judge from each member state, 28 at present, who are supposed to "possess the qualifications required for appointment to the highest judicial offices" (or for the General Court, the "ability required for appointment to high judicial office"). A president is elected by the judges for three years. Under TEU article 19(3) is to be the ultimate court to interpret questions of EU law. In fact, most EU law is applied by member state courts (the English Court of Appeal, the German Bundesgerichtshof, the Belgian Cour du travail, etc.) but they can refer questions to the EU court for a preliminary ruling. The CJEU's duty is to "ensure that in the interpretation and application of the Treaties the law is observed", although realistically it has the ability to expand and develop the law according to the principles it deems to be appropriate. Arguably this has been done through both seminal and controversial judgments, including Van Gend en Loos, Mangold v Helm, and Kadi v Commission.

Question:
Under which courts is most EU law applied?

member state courts