Effective 25 May 2018, the Data Protection Directive is superseded by the General Data Protection Regulation (GDPR), which harmonizes privacy rules across all EU member states. GDPR imposes more stringent rules on the collection of personal information belonging to EU data subjects, including a requirement for privacy policies to be more concise, clearly-worded, and transparent in their disclosure of any collection, processing, storage, or transfer of personally identifiable information. Data controllers must also provide the opportunity for their data to be made portable in a common format, and for it to be erased under certain circumstances.