97As a preliminary point, according to settled case-law, the principle of the protection of legitimate expectations, which is one of the fundamental principles of EU law (see, in particular, judgment of 5 May 1981 in Dürbeck, 112/80, EU:C:1981:94, paragraph 48), implies that any official or other staff member is entitled to rely on that principle in a situation where it is clear that the Union administration, by giving him precise assurances, has caused him to entertain legitimate expectations. The assurances given must, moreover, comply with the relevant rules (judgment of 18 July 2007 in EAR v Karatzoglou, C‑213/06 P, EU:C:2007:453, paragraph 33 and the case-law cited therein).
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