80That conclusion is confirmed by the essential objective of Article 267 TFEU, which is to ensure that EU law is applied uniformly by the national courts and tribunals, that objective being equally vital both for the review of legality of decisions prescribing the adoption of restrictive measures against natural or legal persons and for other European Union acts. With respect to such decisions, differences between courts or tribunals of the Member States as to the validity of a European Union act would be liable to jeopardise the very unity of the European Union legal order and to undermine the fundamental requirement of legal certainty (see, by analogy, judgments of 22 February 1990, Busseni, C‑221/88, EU:C:1990:84, paragraph 15; of 6 December 2005, Gaston Schul Douane‑expediteur, C‑461/03, EU:C:2005:742, paragraph 21, and of 21 December 2011, Air Transport Association of America and Others, C‑366/10, EU:C:2011:864, paragraph 47).
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