87Nevertheless, if, at the stage of the investigations conducted by the national authorities and before the matter is brought before a court, it is established that the official or servant of the European Union may enjoy immunity from legal proceedings in respect of the acts which are the subject of the criminal prosecution, it is for those authorities, in accordance with Article 4(3) TEU and Article 18 of the Protocol on privileges and immunities, to request a waiver of immunity from the EU institution concerned, which is then required to act, in particular, in accordance with the approach set out in paragraphs 58, 62 and 74 above.
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