Members from countries that have a city taking part in the election cannot vote while the city is in the running. The voting is conducted in a succession of rounds until one bid achieves an absolute majority of votes; if this does not happen in the first round, the bid with the fewest votes is eliminated and another voting round begins. In the case of a tie for the lowest number of votes, a special runoff vote is carried out, with the winner proceeding to the next round.