222It has been held on numerous occasions that, as a consequence of a judgment of annulment, which takes effect ex tunc and thus has the effect of retroactively eliminating the annulled measure from the legal system (see Joined Cases 97/86, 99/86, 193/86 and 215/86 Asteris and Others v Commission [1988] ECR 2181, paragraph 30; Opinion of Advocate General Léger in Case C-127/94 Ecroyd [1996] I-2731, I-2735, point 74; and Case T-171/99 Corus UK v Commission [2001] ECR II-2967, paragraph 50), the defendant institution is required, by virtue of Article 233 EC, to take the necessary measures to reverse the effects of the illegalities as found in the judgment of annulment, and, in the case of an act that has already been executed, this may take the form of restoring the applicant to the position he was in prior to that act (see Case 22/70 Commission v Council [1971] ECR 263, paragraph 60; Case 92/78 Simmenthal v Commission [1979] ECR 777, paragraph 32; Case 21/86 Samara v Commission [1987] ECR 795, paragraph 7; Joined Cases T-480/93 and T-483/93 Antillean Rice Mills and Others v Commission [1995] ECR II-2305, paragraphs 59 and 60, and Corus UK v Commission, paragraph 50).
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