The 329 members of the Chamber of Deputies are elected by several methods: 308 are elected from 42 multi-member constituencies based on counties and Bucharest, using proportional representation, four are elected using proportional representation from a constituency representing Romanians living abroad. Parties must pass a threshold of 5% of the national vote or at least 20% of the vote in four constituencies. Further seats (currently 17) can be added for ethnic minority groups that compete in the elections and pass a special (lower) threshold (calculated as 10% of the votes needed to obtain one of the regular 312 seats).[2]