The European Union Rule of Law Mission in Kosovo (EULEX) is based on United Nations Security Council Resolution 1244, which introduced the international rule of Kosovo in 1999.[13] However, the EU force, which was previously planned to be covered by Security council's approval of Ahtisaari proposal, has not received a new UN Security Council mandate due to the opposition from Russia. Russia specifically blocked transfer of UN facility to the EU mission.[14][15] Serbia also views the mission as an EU recognition of an independent Kosovo.[16]