Whilst the Court of Justice alone has jurisdiction to declare an EU act invalid, where a claim is lodged with the national supervisory authorities they may, even where the Commission has adopted a decision finding that a third country affords an adequate level of protection of personal data, examine whether the transfer of a person’s data to the third country complies with the requirements of the EU legislation on the protection of that data and, in the same way as the person concerned, bring the matter before the national courts, in order that the national courts make a reference for a preliminary ruling for the purpose of examination of that decision’s validity The Data Protection Directive provides that the transfer of personal data to a third country may, in principle, take place only if that third country ensures an adequate level of protection of the data.

The directive also provides that the Commission may find that a third country ensures an adequate level of protection by reason of its domestic law or its international commitments. Finally, the directive provides that each Member State is to designate one or more public authorities responsible for monitoring the application within its territory of the national provisions adopted on the basis of the directive (‘national supervisory authorities’).

Maximillian Schrems, an Austrian citizen, has been a Facebook user since 2008. As is the case with other subscribers residing in the EU, some or all of the data provided by Mr Schrems to Facebook is transferred from Facebook’s Irish subsidiary to servers located in the United States, where it is processed. Mr Schrems lodged a complaint with the Irish supervisory authority (the Data Protection Commissioner), taking the view that, in the light of the revelations made in 2013 by Edward Snowden concerning the activities of the United States intelligence services (in particular the National Security Agency (‘the NSA’)), the law and practice of the United States do not offer sufficient protection against surveillance by the public authorities of the data transferred to that country. The Irish authority rejected the complaint, on the ground, in particular, that in a decision of 26 July 20002 the Commission considered that, under the ‘safe harbour’ scheme the United States ensures an adequate level of protection of the personal data transferred (the Safe Harbour
Decision).

The High Court of Ireland, before which the case has been brought, wishes to ascertain whether that Commission decision has the effect of preventing a national supervisory authority from investigating a complaint alleging that the third country does not ensure an adequate level of protection and, where appropriate, from suspending the contested transfer of data.

In today’s judgment, the Court of Justice holds that the existence of a Commission decision finding that a third country ensures an adequate level of protection of the personal data transferred
cannot eliminate or even reduce the powers available to the national supervisory authorities The Court states, first of all, that no provision of the directive prevents oversight by the national
supervisory authorities of transfers of personal data to third countries which have been the subject of a Commission decision. Thus, even if the Commission has adopted a decision, the national
supervisory authorities, when dealing with a claim, must be able to examine, with complete independence, whether the transfer of a person’s data to a third country complies with the requirements laid down by the directive. Nevertheless, the Court points out that it alone has jurisdiction to declare that an EU act, such as a Commission decision, is invalid.

Consequently, where a national authority or the person who has brought the matter before the national authority considers that a Commission decision is invalid, that authority or person must be able to bring proceedings before the national courts so that they may refer the case to the Court of Justice if they too have doubts as to the validity of the Commission decision. It is thus ultimately the Court of Justice which has the task of deciding whether or not a Commission decision is valid.

Finally, the Court finds that the Safe Harbour Decision denies the national supervisory authorities their powers where a person calls into question whether the decision is compatible with the protection of the privacy and of the fundamental rights and freedoms of individuals. The Court holds that the Commission did not have competence to restrict the national supervisory authorities’ powers in that way.

For all those reasons, the Court declares the Safe Harbour Decision invalid. This judgment has the consequence that the Irish supervisory authority is required to examine Mr Schrems’ complaint with all due diligence and, at the conclusion of its investigation, is to decide whether, pursuant to the directive, transfer of the data of Facebook’s European subscribers to the United States should be suspended on the ground that that country does not afford an adequate level of protection of personal data.

Source: http://curia.europa.eu/jcms/upload/docs/application/pdf/2015-10/cp150117en.pdf