It consists of a small number of electorate with only 160 corporate electorates in 2006. The size of the electorates of some constituencies is fewer than 200. Malapportionment occurs when the numbers of voters in electorates are not equal. Southland is divided into two parliamentary electorates. Otago is represented by four parliamentary electorates. Elections to the four Maori electorates were held the day before. All three electorates in the 2017 election were won by National candidates. A party contesting all 71 electorates is therefore permitted to spend $2,975,200 on election campaigning. Unregistered parties can only nominate candidates for individual electorates. But Australia has seen systematic malapportionment of electorates. It contains forty members, elected from eight multi-member electorates known as regions. No party managed to win a straight majority of the 65 electorates. The number of electorates being contested was 87. The policy built up support for the Liberal party in rural North Island electorates. The policy built up support for the Liberal Party in rural North Island electorates.