The Communications Regulatory Authority of the Republic of Lithuania (hereinafter – RRT) is an independent national institution regulating communications sector in Lithuania. It was established under the Law on Telecommunications and the provisions of the European Union Directives. One of the main purposes of RRT establishment is competition promotion in electronic communications and postal sectors. In all European Union countries, the role of the national regulator of communications is crucial in regulating relationship amongst communications market participants, in creating effective competition conditions for undertakings, in defending interests of service users as well as in promoting the advent of new and modern technologies and use of services at the national level.