Without prejudice to  Article 55 , the supervisory authority of the main establishment or of the single establishment of the controller or processor shall be competent to act as lead supervisory authority for the cross-border processing carried out by ...

By derogation from paragraph 1, each supervisory authority shall be competent to handle a complaint lodged with it or a possible infringement of this Regulation, if the subject matter relates only to an establishment in its Member State or substantially...

1 In the cases referred to in paragraph 2 of this Article, the supervisory authority shall inform the lead supervisory authority without delay on that matter. 2 Within a period of three weeks after being informed the lead supervisory authority shall ...

1 Where the lead supervisory authority decides to handle the case, the procedure provided in  Article 60  shall apply. 2 The supervisory authority which informed the lead supervisory authority may submit to the lead supervisory authority a draft for a ...

Where the lead supervisory authority decides not to handle the case, the supervisory authority which informed the lead supervisory authority shall handle it according to  Articles 61  and  62 .

The lead supervisory authority shall be the sole interlocutor of the controller or processor for the cross-border processing carried out by that controller or processor.