Indiana Code Title 1. General Provisions § 1-1-3.5-3

Sec. 3. (a) For purposes of the statutes described in section 5(c) of this chapter, a reference to population is a reference to population as determined by the most recent of the following:

(b) For purposes of statutes relating to drawing boundaries of county executive districts, county fiscal body districts, municipal legislative body districts, or the districts of any other political subdivision, the political subdivision shall use population as reported by the most recent of the following, even if those population data are not yet effective under subsection (f):

(c) For purposes of a noncode statute, a reference to population is the population determined by the most recent federal decennial census in effect before the passage of the statute, unless the population description in the statute is changed by subsequent legislation.

(d) For purposes of statutes classifying political subdivisions by population, a political subdivision's population is considered to be the political subdivision's population as reported by the most recent federal decennial census in effect, unless the statute specifically provides otherwise.

(e) This subsection applies to a political subdivision located in more than one (1) county.  If a political subdivision is described in a statute by reference to the county in which the political subdivision is located, the reference is to the county that contains a majority of the population of the political subdivision.

(f) The effective date of each:

is April 1 of the calendar year following the year in which the tabulation of population or corrected population count is delivered to the state by the United States Secretary of Commerce under 13 U.S.C. 141 and received by the governor.

(g) Promptly upon receiving the tabulation of population or corrected population count, the governor shall issue an executive order: