According to GDPR Article 4(22), a supervisory authority is concerned by the processing of personal

data if the data subjects residing in its member state are substantially affected or likely to be

substantially affected by the processing, or if a complaint has been lodged with it. This concept is

mainly introduced to ensure that the rights and interests of data subjects are protected by the

supervisory authorities that are closest to them, regardless of where the controller or processor is

established or where the lead supervisory authority is located. The concerned supervisory

authorities have the right to participate in the one-stop-shop and consistency mechanisms, and to

express their views and objections on the draft decisions of the lead supervisory authority. They also

have the duty to cooperate and assist each other in the performance of their tasks. Reference: GDPR

Article 4(22), GDPR Article 60, GDPR Article 63, The role of the ’supervisory authority concerned’

(Chapter 3.1 …