Indiana Code Title 3. Elections § 3-5-2.1-67

(1) For candidates nominated in a primary election, the date of the primary election.

(2) For candidates nominated in a convention, the date the convention is scheduled to be called to order, according to the call of the convention issued by the political party.

(3) For candidates selected to fill a ballot vacancy, the date the certificate of selection of the candidate is filed under IC 3-13-1-15 or IC 3-13-2-8.

(4) For candidates nominated by petition, the final date the petition of nomination is permitted to be filed under IC 3-8-6-10(c).

(5) For write-in candidates, the final date the candidate's declaration of intent to be a write-in candidate is permitted to be filed under IC 3-8-2-4.