34In that regard, it is to be remembered that when a question on the validity of a measure adopted by the Community institutions is raised before a national court, it is for that court to decide whether a decision on the matter is necessary to enable it to give judgment and consequently whether it should request the Court to rule on that question. Accordingly, where the national court's questions relate to the validity of a provision of Community law, the Court is obliged in principle to give a ruling (Case C-408/95 Eurotunnel and Others [1997] ECR I-6315, paragraph 19).
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