Regulation (EC) No 544/2009 of the European Parliament and of the Council of 18 June 2009 amending Regulation (EC) No 717/2007 on roaming on public mobile telephone networks within the Community and Directive 2002/21/EC on a common regulatory framework for electronic communications networks and services (Text with EEA relevance )
Treaty establishing the European Community (consolidated version) Part Three - Community policies TITLE VI - Common rules on competition, taxation and approximation of laws Chapter 3 - Approximation of laws Article 95
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Internal market - Principles
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Information technology, telecommunications and data-processing