Supplementary Vote Law and Legal Definition

Supplementary vote refers to a voting system used for the election of a single candidate. Under supplementary vote, voters are limited to indicating a first and second preference. The candidate who receives more than a half of first preference votes cast on the first count is deemed elected. When nobody receives half of the first preference, all but the top two candidates are eliminated and their second preferences are redistributed and the candidate with the greatest share of the resultant vote is elected.