29It follows that questions concerning European Union law enjoy a presumption of relevance. The Court may refuse to rule on a question referred by a national court for a preliminary ruling only where it is quite obvious that the interpretation of European Union law that is sought is unrelated to the actual facts of the main action or its purpose, where the problem is hypothetical, or where the Court does not have before it the factual or legal material necessary to give a useful answer to the questions submitted to it (Joined Cases C-570/07 and C-571/07 Blanco Pérez and Chao Gómez [2010] ECR I-4629, paragraph 36, and Case C-509/10 Geistbeck [2012] ECR, paragraph 48).
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