The CC was not a permanent institution. It convened plenary sessions, of which ten CC plenary sessions and one joint CC–Central Control Commission (CCC) plenary sessions were held between the 12th Congress and the 13th Congress. 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).