General Secretary of the Communist Party of the Soviet Union more than determine party membership composition. Stalin, its first incumbent, used the principles of democratic centralism to transform his office into that of party leader, and later leader of the Soviet Union. In 1934, the 17th Party Congress refrained from formally re-electing Stalin as General Secretary. However, Stalin was re-elected into all other positions and remained leader of the party without diminishment. In the 1950s, Stalin increasingly withdrew from Secretariat business, leaving the supervision of the body to Georgy Malenkov, possibly to test him as a potential successor. In October 1952, at the 19th Party Congress, Stalin restructured the party's
Premier of the Soviet Union the Presidium of the Supreme Soviet. The Premier was tasked with resolving all state administrative duties within the jurisdiction of the USSR to the degree which were not the responsibility of the Supreme Soviet or the Presidium. The Premier managed the national economy, formulated the five-year plans and ensured socio-cultural development. When Nikolai Ryzhkov was replaced as premier by Valentin Pavlov, the Council of Ministers was renamed the Cabinet of Ministers. The premier's title was changed to Prime Minister of the Soviet Union, though most non-Soviet sources had referred to the job as "Premier" or "Prime Minister" for some time