When positions remain unfilled after the primary election, then a run-off election shall be conducted in November following the primary election. Voting shall be by secret ballot. Absentee ballots shall be available upon written request by eligible voters and mailed in a timely manner to such voters. The run-off shall be between the two candidates receiving the most votes in the primary election. The candidate receiving the most votes in the run-off election for each position shall be elected.