Sec. 12. (a) If a tie vote occurs among participants acting under section 3, 4, 5, or 6(c) of this chapter, the chairman of the meeting may cast the tiebreaking vote. If a tie vote occurs among participants acting under section 6(b) of this chapter, the county chairman or an individual designated by the county chairman may cast the tiebreaking vote.
(b) If a quorum required under the rules of a meeting held under this chapter is not present, the county chairman shall fill the candidate vacancy.