28Although it is true that the literal wording of the questions referred for a preliminary ruling by the national court calls on the Court to rule on the compatibility of a provision of national law with European Union law, there is nothing to prevent the Court from giving an answer of use to the national court by providing the latter with the guidance as to the interpretation of European Union law necessary to enable that court to rule itself on the compatibility of the national rules with European Union law (see, to that effect, Placanica and Others, paragraph 37).
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