A Conference, officially referred to as an All-Union Conference, was convened between Congresses by the Central Committee to discuss party policy and to make personnel changes within the Central Committee. 19 conferences were convened during the CPSU's existence. The 19th Congress held in 1952 removed the clause in the party's statute which stipulated that a party Conference could be convened. The clause was reinstated at the 23rd Congress, which was held in 1966.