The Parliament adopted constitutional amendments with 117 in favor and three against during the third hearing, regarding the move to a new electoral system.
Opposition factions - the United National Movement and European Georgia, did not take part in the voting process. Opposition lawmakers said they would only support the changes if Giorgi Rurua were released.
A total of 113 votes were needed to pass the constitutional amendments.
On June 23, the Parliament of Georgia voted in the second hearing on the constitutional amendments. The project was supported by 115 deputies, with three against.
According to the constitutional amendments, the 2020 parliamentary elections will occur under a mixed electoral system 120/30 and a 1% threshold.
The bill covers the so-called 40% shutdown mechanism, which means that a party that receives less than 40.54% support in the 2020 parliamentary elections under the proportional system will not be able to independently form a government.