The Unlawfulness of Data Retention confirmed by the Court of Justice of the European Union (CJEU) and the Austrian Constitutional Court (VfGH) - Journal of European Consumer and Market Law View The Unlawfulness of Data Retention confirmed by the Court of Justice of the European Union (CJEU) and the Austrian Constitutional Court (VfGH) by - Journal of European Consumer and Market Law The Unlawfulness of Data Retention confirmed by the Court of Justice of the European Union (CJEU) and the Austrian Constitutional Court (VfGH) 4 3 Journal of European Consumer and Market Law