Tibet demonstrated from 1913 to 1950 the conditions of statehood as generally accepted under international law. In 1950, there was a people and a territory, and a government which functioned in that territory, conducting its own domestic affairs free from any outside authority. From 1913-1950, foreign relations of Tibet were conducted exclusively by the Government of Tibet, and countries with whom Tibet had foreign relations are shown by official documents to have treated Tibet in practice as an independent State.
[Tibet and Chinese People's Republic, Geneva, 1960, pp. 5,6]

Part of When the Iron Bird Flies: The Disappearance of Tibet exhibit