Convention for the Protection of Human Rights and Fundamental Freedoms

http://conventions.coe.int/treaty/en/Treaties/Html/005.htm

Article 10 - Freedom of Expression

1. Everyone has the right to freedom of expression. This right shall include freedom to hold opinions and to receive and impart information and ideas without interference by public authority and regardless of frontiers. This article shall not prevent States from requiring the licensing of broadcasting, television or cinema enterprises.