Central Executive Committee of the Soviet Union
The post of chair of the Council of People's Commissars of the Soviet Union – the head of the executive body of the Central Executive Committee of the Soviet Union – was established by the Treaty on the Formation of the Union of Soviet Socialist Republics, which entered into force after approval by the First Congress of Soviets at a meeting on December 30, 1922. The first chairman of the Council of People's Commissars of the Soviet Union was appointed to the post at the 2nd session of the Central Executive Committee of the Soviet Union on July 6, 1923.