27It is settled case-law that questions on the interpretation of European Union law referred by a national court in the factual and legal context which that court is responsible for defining, the accuracy of which is not a matter for the Court to determine, enjoy a presumption of relevance. The Court may refuse to rule on a request made by a national court only where it is quite obvious that the interpretation of European Union law that is sought bears no relation 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-188/10 and C-189/10 Melki and Abdeli [2010] I-5667, paragraph 27 and the case-law cited).
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