16This court finds that, in accordance with established case-law, it is for the national courts alone which are seised of the case and are responsible for the judgment to be delivered to determine, in view of the special features of each case, both the need for a preliminary ruling in order to enable them to give their judgment and the relevance of the questions which they put to the Court. Consequently, where the questions put by national courts concern the interpretation of a provision of Community law, the Court is, in principle, bound to give a ruling (Joined Cases C-297/88 and C-197/89 Dzodzi v Belgian State [1990] ECR I-3763, paragraphs 34 and 35; Case C-231/89 Gmurzynska-Bscher v Oberfinanzdirektion Köln [1990] ECR I-4003, paragraphs 19 and 20).
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