AZ SB1539

Allows electronic voting systems to accommodate ranked choice voting when ranking for contests is possible, requiring systems to reject votes exceeding the allowable number.

Establishes ranked choice voting procedures for Arizona elections with threshold formulas calculated by dividing total valid votes cast by one plus the number of candidates to be elected, then adding one vote.

Permits single-seat and multiseat ranked choice voting in any city, town, or county election with three or more voting options, with ballot design allowing voters to rank candidates in order of preference.

Requires surplus votes from elected candidates to be redistributed to advancing candidates using a transfer value calculated to four decimal places based on the ratio of surplus votes to total votes received.

Mandates voter education campaigns, sample ballots with fictitious names, and clear ballot instructions explaining that ranking additional candidates does not harm higher-ranked choices and increases chances of ballot counting.