The Central Committee (CC) composition was elected by the 15th Congress, and sat from 19 December 1927 until 13 July 1930.

The CC 1st Plenary Session renewed the composition of the Politburo, Secretariat and the Organizational Bureau (OB) of the All-Union Communist Party (Bolsheviks).

When the CC was not in session, decision-making powers were transferred to inner bodies of the CC itself; the Politburo, Secretariat and Orgburo (none of these bodies were permanent either, but convened several times a months).

[3] The leaders of departments were officially referred to as Heads, while the titles of bureau leaders varied between chairman, first secretary and secretary.

[4] [11][12][13] [14][a] Plenary sessions, apparatus heads, ethnicity (by clicking on the individual names on "The Central Committee elected by the XVth Congress of the CPSU (b) 12.19.1927 members" reference), the Central Committee full- and candidate membership, Politburo membership, Secretariat membership and Orgburo membership were taken from these sources: