Lithuania is an EU member country since 1st May 2004. The Competition Council of the Republic of Lithuania as the national competition authority cooperates with the European Commission and national competition authorities of other EU member states on the basis of Council Regulation (EC) No 1/2003 of 16 December 2002 on the implementation of the rules on competition laid down in Articles 81 and 82 of the Treaty and Council Regulation (EC) No 139/2004 of 20 January 2004 on the control of concentrations between undertakings.