6th State Duma Of the seven parties participating in the elections, only four were able to overcome the 7% election threshold to gain representation based upon the proportional representation system. On December 21, 2011, the parliament elected Sergey Naryshkin from the United Russia as the Chairman of the State Duma. At the same time, according to tradition, until the election of the Chairman of the State Duma, the meeting carried the oldest members of the State Duma – 87-year-old Vladimir Dolgikh (from United Russia) and 81-year-old Zhores Alferov (from Communist Party). On December 21, 2011, the State Duma approved the composition of its
Duma this was changed to a five-year term in late 2008. In previous elections of 1993, 1995, 1999 and 2003 one half of the deputies were elected by a system of proportional representation and one half were elected by plurality in single member districts. However, the 2007 Duma elections were carried out in a new format: all 450 deputies were elected by a system of proportional representation. Russian citizens at least 21 years old are eligible to run for the Duma (Article 97). Duma A duma (дума) was a Russian assembly with advisory or legislative functions. The term comes from the