55Under the first paragraph of Article 266 TFEU, the institution whose act has been declared void is required to take the necessary measures to comply with the judgment of the Court of Justice. Those rules provide for the sharing of powers between the judicial authority and the administrative authority, according to which it is for the institution that issued the act annulled to determine what measures are required to comply with a judgment annulling a decision (Erba and Reynier v Commission, 98/63 R and 99/63 R, EU:C:1963:46; Meskens v Parliament, T‑84/91, ECR, EU:T:1992:103, paragraph 73; and C and F v Commission, F‑44/06 and F‑94/06, ECR-SC, EU:F:2007:66, paragraph 33).
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