Indiana Code Title 36. Local Government § 36-1-6-10

Sec. 10. (a) This section applies to:

to establish executive, fiscal, or legislative body election districts within the unit.

(b) Except as otherwise provided in the ordinance or order, the ordinance or order takes effect immediately upon passage.  However, a previously adopted ordinance or order establishing election districts remains in effect for the purpose of filling a vacancy in the executive, fiscal, or legislative body until the expiration of the term of that office.

(c) A reference in the ordinance or order to the boundary of a political subdivision, a precinct boundary, or an election district boundary refers to the precinct or boundary as the precinct or boundary existed on the date of adoption of the ordinance or order.  A change in the boundary of a political subdivision, precinct, or election district following the date of adoption of the ordinance or order does not alter the boundaries of the election districts established by the ordinance or order.

(d) The adoption of an ordinance or order does not affect the right of an individual serving as a member of the executive, fiscal, or legislative body of the unit to continue to serve in office until the expiration of the member's current term specified under state law.