63It follows from the foregoing that, first, in relation to the cross-border processing of personal data, the competence of the lead supervisory authority for the adoption of a decision finding that such processing is an infringement of the rules relating to the protection of the rights of natural persons as regards the processing of personal data found in Regulation 2016/679 constitutes the rule, whereas the competence of the other supervisory authorities concerned for the adoption of such a decision, even provisionally, constitutes the exception. Second, while the competence as a general rule of the lead supervisory authority is confirmed in Article 56(6) of Regulation 2016/679, which states that the lead supervisory authority is the ‘sole interlocutor’ of the controller or processor with respect to the cross-border processing carried out by that controller or that processor, that authority must exercise such competence within a framework of close cooperation with the other supervisory authorities concerned. In particular, the lead supervisory authority cannot, in the exercise of its competences, as stated in paragraph 53 of the present judgment, eschew essential dialogue with and sincere and effective cooperation with the other supervisory authorities concerned.
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