28It must be recalled in this respect that, although it is not the task of the Court, in preliminary ruling proceedings, to rule upon the compatibility of provisions of national law or a national practice with the legal rules of the European Union, the Court has repeatedly held that it has jurisdiction to give the national court full guidance on the interpretation of European Union law in order to enable it to determine the issue of compatibility for the purposes of the case before it (see Case C-118/08 Transportes Urbanos y Servicios Generales [2010] ECR I-635, paragraph 23, and case-law there cited).
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