35Furthermore, an action against a confirmatory decision is inadmissible only if the confirmed decision has become final in relation to the person concerned because no action has been brought within the prescribed period. Otherwise, the person concerned is entitled to challenge either the confirmed decision, or the confirmatory decision, or both (judgment of 18 December 2007, Weißenfels v Parliament, C‑135/06 P, EU:C:2007:812, paragraph 54).
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