Indiana Code Title 36. Local Government § 36-2-2-4

Sec. 4. (a) This subsection does not apply to the following counties:

The executive shall divide the county into three (3) districts that are composed of contiguous territory and are reasonably compact.  The district boundaries drawn by the executive must not cross precinct boundary lines and must divide townships only when a division is clearly necessary to accomplish redistricting under this section.  If necessary, the county auditor shall call a special meeting of the executive to establish or revise districts.

(b) This subsection applies to a county having a population of more than four hundred fifty thousand (450,000) and less than seven hundred thousand (700,000).  A county redistricting commission shall divide the county into three (3) single-member districts that comply with subsection (d).  The commission is composed of:

The legislative members of the commission have no vote and may act only in an advisory capacity.  A majority vote of the voting members is required for the commission to take action.  The commission may meet as frequently as necessary to perform its duty under this subsection.  The commission's members serve without additional compensation above that provided for them as members of the Indiana election commission, the senate, or the house of representatives.

(c) This subsection applies to a county having a population of more than one hundred eighty-five thousand (185,000) and less than three hundred thousand (300,000) that opts in to the system of county government described in subsection (d), sections 4.7(c) and 5(d)(2) of this chapter, IC 36-2-3-2(b), IC 36-2-3-4(c), and IC 36-2-3.5-1(2) by passing a resolution by a majority vote of its executive body not later than September 1, 2023.  In the event the executive body of a county described in this subsection does not opt in by September 1, 2023, the county shall be governed by the general provisions of this chapter.  The executive shall divide the county into three (3) single-member districts that comply with subsection (d).

(d) Single-member districts established under subsection (b) or (c) must:

(e) Except as provided by subsection (f), a division under subsection (a), (b), or (c) shall be made only at times permitted under IC 3-5-10.

(f) If the county executive or county redistricting commission determines that a division under subsection (e) is not required, the county executive or county redistricting commission shall adopt an ordinance recertifying that the districts as drawn comply with this section.

(g) Each time there is a division under subsection (e) or a recertification under subsection (f), the county executive or county redistricting commission shall file with the circuit court clerk of the county, not later than thirty (30) days after the division or recertification occurs, a map of the district boundaries:

(h) The limitations set forth in this section are part of the ordinance, but do not have to be specifically set forth in the ordinance.  The ordinance must be construed, if possible, to comply with this chapter.  If a provision of the ordinance or an application of the ordinance violates this chapter, the invalidity does not affect the other provisions or applications of the ordinance that can be given effect without the invalid provision or application.  The provisions of the ordinance are severable.

(i) IC 3-5-10 applies to a plan established under this section.