66In any event, in proceedings for annulment, even an unreasonable delay cannot in itself render the contested decision unlawful and thereby justify its annulment for breach of the principle of legal certainty. A delay in the conduct of the procedure for implementation of a judgment is not, in itself, of a nature such as to affect the validity of the measure which is the outcome of that procedure: if that measure were annulled merely because of its belatedness, it would be impossible to adopt a valid measure since the measure intended to replace the annulled measure could be no less belated than the latter, (see, by analogy, Case T-150/94Vela Palacios v ESC [1996] ECR-SC II-877, paragraph 44).