Initially, the term "Old Bolshevik" (ста́рый большеви́к, "stary bolshevik") referred to Bolsheviks who joined the Russian Social Democratic Labour Party before 1905. On February 13, 1922, under the chairmanship of the Old Bolshevik historian Mikhail Olminsky, the Society of Old Bolsheviks (Общество старых большевиков) at the Istpart (Commission on the Study of the History of the October Revolution and RCP(b)) was established. The first Statute required membership before January 1, 1905, with admission in some cases of other Social Democrats with the same career time who later joined the Bolsheviks. Initially there were 64 members. Later it was renamed the All-Union Society. The 1931 Statute had requirement of continuous party membership of at least 18 years, with exceptions to be granted by the Society Presidium (approved by the Society Council). By 1934, there were over 2000 members. The All-Union Society was self-dissolved in 1935, announcing that "it has completed its tasks". Vadim Rogovin cites the statistics published by the 13th Congress of the Russian Communist Party (Bolsheviks) that, in 1924, of 600,000 Party members, 0.6% joined before 1905, 2% joined in 1906–1916 and &lt;9% joined in 1917.