system for National Assembly elections between 1990 and 2010 Until 2010, elections for the 386-seat National Assembly (Országgyűlés'') involved two separate ballots, two rounds, and three classes of seats: 176 members were elected in single-member districts through a two-round system, and 146 were elected through proportional representation in 20 regional multi-member constituencies (MMCs), in a non-compensatory way (parallel allocation). Finally, 64 nationwide levelling seats were allocated in such a way to correct for discrepancies between votes and seats in the different constituencies (the number of multi-member district seats and levelling seats varied over time; the shares shown here were for the 2010 election). For both MMCs and levelling seats, the electoral threshold was 5% of the MMC vote. (Where two parties presented a joint list, their threshold was 10%; for three or more joined parties, the threshold was 15%.) The second round would be held two weeks after the first, in situations where no candidate in the single-member district won and/or where the MMC result was invalidated due to low turnout. First round In the first round, each voter may cast one vote for one candidate running for the local single-seat constituency; one vote for a party list established in the local MMC. After the polls close: The result in single-seat constituencies where voter turnout was below 50% is declared invalid, and all candidates for the first round enter the second round. Any single-seat constituency where turnout was over 50% and one candidate received over 50% of the votes is won by that candidate, and no second round takes place. In all remaining single-seat constituencies (i.e., where turnout exceeded 50% but no candidate received over 50% of votes), the top three candidates and any other candidates having received at least 15% of votes are eligible (a kind of runoff voting). The result for MMCs where the turnout was over 50% is produced. (If all MMCs saw adequate turnout, the parties passing the election threshold could already be determined and the MMC seats could be allocated.) Second round In the second round, each voter may cast one vote for one candidate still standing in the single-seat constituency, if the seat was not won in the first round; one vote for a party list in the MMC, if the first round was invalid due to insufficient turnout. After the polls close: Any seats in single-seat constituencies where turnout was below 25%, or