Recital 40

Article 35 of that Regulation (EU) 2016/679 requires controllers to conduct a data protection impact assessment where the processing of personal data is likely to result in a high risk to the rights and freedoms of natural persons. The supervisory authorities established pursuant to that Regulation are required to establish and make public a list of the kind of processing operations which are subject to the requirement for a data protection impact assessment. In addition, the Regulation provides that supervisory authorities may establish and make public a list of the kind of processing operations for which no data protection impact assessment is required. In order to effectively contribute to the aim of convergence of the economies and to effectively ensure free flow of personal data between Member States, increase legal certainty, facilitate compliance by controllers and ensure a harmonised interpretation of the notion of a high risk to the rights and freedoms of data subjects, a single list of processing operations should be provided at EU level, to replace the existing national lists. In addition, the publication of a list of the type of processing operations for which no data protection impact assessment is required, which is currently optional, should be made mandatory. The lists of processing operations should be prepared by the Board and adopted by the Commission as an implementing act. In order to facilitate compliance by controllers, the Board should also prepare a common template and a common methodology for conducting data protection impact assessments, to be adopted by the Commission as an implementing act. The Commission should take due account of the proposals prepared by the Board and review them, as necessary, prior to adoption. In order to take account of technological developments, the lists and the common template and methodology should be reviewed at least every three years and updated where necessary.