Indiana Code Title 36. Local Government § 36-5-2-5

(1) one (1) member for each district established under:

(2) the number of members provided for when the town adopted an ordinance under section 4.1 of this chapter abolishing town legislative body districts.

(1) are to be elected by the voters of the district in which they reside;

(2) are to be elected at large by the voters of the whole town;  or

(3) are to be elected both by districts and at-large.

(1) specify which seats on the legislative body are elected by the voters of a district and which are elected by the voters of the whole town;  and

(2) provide that the ordinance is effective on January 1 following its adoption.