57The principles of the protection of legitimate expectations and legal certainty form part of the Community legal order. They must accordingly be observed by the Community institutions (Case 74/74 CNTA v Commission [1975] ECR 533), but also by the Member States when they exercise the powers conferred on them by Community directives (Belgocodex, paragraph 26; Schlossstrasse, paragraph 44; and Case C-62/00 Marks & Spencer [2002] ECR I-6325, paragraph 44).
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