Savez Izviđača Srbije (), English: Scout Association of Serbia) is the primary national Scouting organization of Serbia. A referendum on independence was held in Montenegro on May 21, 2006, voting to leave its state union with Serbia by a narrow margin. Montenegro became the world's 193rd recognized sovereign state, which has then split the Savez Izviđača Srbije i Crne Gore (Scout Association of Serbia and Montenegro), as happened with Czechoslovakia in 1993, meaning that the membership in the World Organization of the Scout Movement was transferred to Savez Izviđača Srbije. History The first Scout units in what was to become Yugoslavia were founded in 1911 by Dr. Miloš Popović, in Belgrade, Kragujevac, Vranje and Valjevo. As Kingdom of Yugoslavia, Serbia served as one of the 20 original signatories that founded the World Organization of the Scout Movement, from 1922 to 1950. The Russian Scout association Русский Скаут went into exile after World War I, and continued where fleeing White Russian émigrés settled, establishing groups in Serbia. The outbreak of World War II saw the suspension of Scouting in Serbia in 1941, when Yugoslavia was occupied by the Germans. Scouting in Yugoslavia was co-opted by the Tito government in 1950, at which time WOSM membership was forfeited, as the new organization did not meet all the criteria for membership, as there were very close connections with the communist government. In 1951, individual Scout associations were founded in all then-Yugoslav republics. The Scout Association of Yugoslavia was renewed under the former Federal Socialist Republic of Yugoslavia on November 24, 1951 at a meeting held in Zagreb, now in Croatia. Individual branches were created for each constituent republic, and the Scout movement grew and thrived until the Yugoslav dissolution in 1991. Present day Yugoslavia, as Serbia and Montenegro, returned as the 137th member of the World Organization of the Scout Movement on September 1, 1995. In the prevailing situation in the Balkans, the association is very active in social work for all segments of the population, and cooperates closely with the Red Cross in providing aid to refugees, opportunities for the disabled, help for orphans and general aid to areas in crisis. The SIS has recently been featured in news stories about the work they are doing for the environment. The SIS is active in a campaign to introduce new methods and materials of packaging, different schemes for garbage collection and recycling programmes.