In this context and in order to promote reconciliation, the rule of law and conformity with the highest internationally recognised standards, the Mission will also assist and advise on the full implementation of legislation and monitor the proper functioning and development of democratic institutions, processes and mechanisms".[2] On the 14 July 1997 United Nations Security Council Resolution 1120 urged the Government of the Republic of Croatia to cooperate fully with the OSCE mission in return of all refugees and displaced persons, protection of their rights, and the protection of persons belonging to national minorities.[3] The annual budget of the Mission in 2000 was 21,086,900 euros.[2] Along the Zagreb headquarters mission was operating from three co-ordination Centres in Vukovar, Sisak and Knin and 14 field offices.[2] In the region of former Eastern Slavonia, Baranja and Western Syrmia mission operated the Police Monitoring Group in the 1998-2000 period but close it down in September 2000 due to the stable security situation in Croatia and notably in the Danube region.[2] On the 21 December 2007 OSCE Permanent Council decided on closing the OSCE Mission to Croatia, on 31 December 2007, and keeping only the OSCE office in Zagreb.[4] This office itself was closed on 17 January 2012.[5] Croatia became full member state of NATO in 2009 and European Union in 2013.