Abstract
The one-stop-shop mechanism was announced as one of the main advantages of the data protection reform for businesses. During the legislative process it evolved towards the inclusion of supervisory authorities from other Member States in the decision-making procedure. It was meant to assure protection of data subjects (so-called proximity). The final version of the decision-making procedure consists of cooperation and consistency mechanisms. The former involves the lead supervisory authority and supervisory authorities concerned. In case of disagreement, it is complemented by the consistency mechanism, in which the European Data Protection Board plays a key role. These rules do not apply in case of local processing and in urgency.