39It must be noted that the appellants dispute the General Court’s conclusion in paragraph 56 of the judgment under appeal, but do not challenge the case-law on which the General Court based its conclusion, set out as follows in paragraph 55 of the judgment under appeal:‘However, it is settled case-law that no official or member of the temporary staff may rely on an unlawful act in order to gain an advantage. Indeed, the principle of equal treatment must be reconciled with the principle of legality, according to which no person may rely, in support of his claim, on an unlawful act committed in favour of another (judgments of 4 July 1985, Williams v Court of Auditors, 134/84, EU:C:1985:297, paragraph 14; of 2 June 1994, de Compte v Parliament, C‑326/91 P, EU:C:1994:218, paragraphs 51 and 52; and of 1 July 2010, Časta v Commission, F‑40/09, EU:F:2010:74, paragraph 88).’
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