29In that regard, it is apparent from the case-law that, in order to show that the organisation of an administrative procedure does not ensure sufficient guarantees to exclude any legitimate doubt as to possible bias, it is not necessary to prove lack of impartiality but is sufficient for a legitimate doubt to arise that cannot be dispelled (judgment of 21 October 2021, Parliament v UZ, C‑894/19 P, EU:C:2021:863, paragraph 54; see also, to that effect, judgment of 27 March 2019, August Wolff and Remedia v Commission, C‑680/16 P, EU:C:2019:257, paragraph 37).
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