The Data Retention Directive (Directive 2006/24/EC), a directive, later declared invalid by the European Court of Justice, was at first passed on 15 March 2006 and regulated data retention, where data has been generated or processed in connection with the provision of publicly available electronic communications services or of public communications networks. It amended the Directive on Privacy and Electronic Communications. According to the Data Retention Directive, EU member states had to store information on all citizens' telecommunications data (phone and internet connections) for a minimum of six months and at most twenty-four months, to be delivered on demand to police authorities.