56It is settled case-law that annulment judgments given by the European Union Courts have force of res judicata with absolute effect as soon as they become final. This applies not only to the operative part of the judgment annulling a decision, but also to the grounds which are its essential basis and are inseparable from it (Asteris and Others v Commission, 97/86, 99/86, 193/86 and 215/86, ECR, EU:C:1988:199, paragraphs 27 to 30; Industrie des poudres sphériques v Council, C‑458/98 P, ECR, EU:C:2000:531, paragraph 81; and ThyssenKrupp Stainless v Commission, T‑24/07, ECR, EU:T:2009:236, paragraphs 113 and 140). The judgment annulling the act therefore means that the author of the annulled act must adopt a new act having regard not only to the operative part of the judgment but also to the grounds which led to the judgment and constitute its essential basis, thereby ensuring that the new act is not affected by the same irregularities as those identified in the judgment annulling the original act (see, to this effect, Interporc v Commission, C‑41/00 P, ECR, EU:C:2003:125, paragraphs 29 and 30).
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