Internal Market in Electricity Directive is the Directive 2003/54/EC of the European Parliament and the Council of 26 June 2003 concerning common rules for the internal market in electricity and repealing Directive 96/92/EC is based in the Treaty establishing the European Community, and in particular Article 47(2), Article 55 and Article 95 thereof. Important: Directive 2003/54/EC has been replaced by Directive 2009/72/EC and then by Directive 2019/994. Electricity customers should be able to choose their supplier freely and ensure they have a real and effective right to .