Treaty on the Creation of the USSR
As outlined in the Treaty on the Creation of the USSR and the Declaration of the Creation of the USSR, and successively the 1924 Constitution of the Soviet Union and 1936 Constitution of the Soviet Union, the Soviets were the basis of government in the USSR. Factory and village Soviets would send delegates to town Soviets, and in turn the town Soviet would send delegates to the regional Soviet, town and regional Soviets elected delegates to the provincial Soviet, provincial Soviets sent delegates to the Soviet of the constituent republic, and the Soviets of the Union Republics sent delegates to the Congress of Soviets of the U.S.S.R. As of 1936, the election of delegates up the pyramid became direct with the creation of the Supreme Soviets.