17Since the referring court refers, in the question referred for a preliminary ruling, to two judgments of the Tribunal Supremo (Supreme Court), it must be borne in mind, as a preliminary point, that, although it is not the task of the Court, in preliminary ruling proceedings, to rule upon the compatibility of provisions of national law with the legal rules of the European Union, it has jurisdiction to give the national court full guidance on the interpretation of EU law in order to enable it to determine the issue of compatibility for the purposes of the case before it (judgment of 26 January 2010, Transportes Urbanos y Servicios Generales, C‑118/08, EU:C:2010:39, paragraph 23 and the case-law cited).
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