However, respect for the principle of equal treatment must be reconciled with respect for the principle of legality, according to which a person may not rely, in support of his claim, on an unlawful act committed in favour of a third party (see, to that effect, Case 134/84 Williams v Court of Auditors [1985] ECR 2225, paragraph 14; SCA Holding v Commission, paragraph 204 above, paragraph 160; Case T-23/99 LR AF 1998 v Commission [2002] ECR II‐1705, paragraph 263; and Mo och Domsjö v Commission, paragraph 204 above, paragraph 398).
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