11. Chandrakanthan also won the most number of preferential votes in the Batticaloa District. 12. The ICSS conducts its elections using a preferential voting electoral method. 13. Cairns is part of the Cairns Region preferential voting system. 14. From then until 1942 an unusual form of preferential voting called the'contingent vote'was used. 15. The "'Oklahoma primary electoral system "'was a voting system used to elect preferential voting . 16. He obtained 1, 129 preferential votes , the most voted MNI candidate from the constituency. 17. Sri Lanka's complex electoral system involves a mix of preferential voting and proportional representation. 18. The Bavin Coalition Government that followed introduced compulsory preferential voting for the 1930 election. 19. Voting is by preferential voting , with peers ranking the candidates in order of preference. 20. An amendment was also passed to abolish optional preferential voting .