61Although the first paragraph of Article 351 TFEU implies a duty on the part of the institutions of the European Union not to impede the performance of the obligations of Member States which stem from an agreement prior to 1 January 1958, such as the Chicago Convention, it is, however, to be noted that that duty of the institutions is designed to permit the Member States concerned to perform their obligations under a prior agreement and does not bind the European Union as regards the third States party to that agreement (see, to this effect, Case 812/79 Burgoa [1980] ECR 2787, paragraphs 8 and 9).
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