Highest organ of UEA was the Komitato. It gathered representatives from the national organizations, the numbers depended on the size of the national organization. Other representatives were elected by the delegates, depending on the number of delegates. A third group of representatives was elected by the two first groups, this opened the possibility to include 'experts' who were not linked to a national organization or popular among the delegates. Since 1947, one speaks of the "komitatanoj A" (from the national organizations), the "komitatanoj B" (from the delegates, later members) and the "komitatanoj C" (those by-elected).