On May 16, 2011, EU's Article 29 Working Party (WP29) adopted an opinion setting out privacy compliance guidance for mobile geolocation services.WP29 is comprised of representatives from the EU member states' data protection authorities (DPAs), the European Data Protection Supervisor and the European Commission. WP29's mandate includes (i) giving expert advice to the EU member states regarding the implementation of European data protection directives, and (ii) promoting uniform implementation of the directives in all EU state members as well as in Norway, Liechtenstein and Iceland. WP29's opinions, therefore, carry significant weight in the interpretation and enforcement of data protection laws by European DPAs. Not surprisingly, WP29 has concluded that geolocation data is "personal data" subject to the protections of the European data protection framework, including the EU Data Protection Directive 95/46/EC. The Working Party also determined that the collection, use and other processing of geolocation data through mobile devices generally requires explicit, informed consent of the individual. Below are the highlights of the opinion.