Directive 2004/52/EC of the European Parliament and of the Council of 29 April 2004 on the interoperability of electronic road toll systems in the Community (Text with EEA relevance)
Treaty establishing the European Community (Nice consolidated version) Part Five: Institutions of the Community Title I: Provisions governing the institutions Chapter 2: Provisions common to several institutions Article 251 Article 189b - EC Treaty (Maastricht consolidated version)
Treaty establishing the European Community (Nice consolidated version) Part Three: Community policies Title V: Transport Article 71 Article 75 - EC Treaty (Maastricht consolidated version) Article 75 - EEC Treaty