Indiana Code Title 3. Elections § 3-13-1-18

Sec. 18.  (a) If a candidate vacancy occurs in a town subject to IC 3-8-5 for any office on the ticket of a political party whose candidates were selected by petition of nomination, the vacancy may be filled only as prescribed by this section.

(b) To fill the vacancy, the town chairman of the party must file a certificate of candidate selection together with the consent required by section 14 of this chapter with the official with whom certificates must be filed.  The certificate of candidate selection must be filed not later than the date and hour that a certificate of nomination by a town convention must be filed under IC 3-8-5-13.