31It is settled case-law that, in the context of the cooperation between the Court of Justice and the national courts established by Article 234 EC, it is solely for the national court before which the dispute has been brought, and which must assume responsibility for the subsequent judicial decision, to determine in the light of the particular circumstances of the case both the need for a preliminary ruling in order to enable it to deliver judgment and the relevance of the questions which it submits to the Court. Consequently, where the questions submitted by the national court concern the interpretation of Community law, the Court of Justice is, in principle, bound to give a ruling (see, inter alia, Case C-415/93 Bosman [1995] ECR I-4921, paragraph 59; Case C-379/98 PreussenElektra [2001] ECR I-2099, paragraph 38, and Case C-390/99 Canal Satélite Digital [2002] ECR I-607, paragraph 18).
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