Indiana Code Title 36. Local Government § 36-1.5-4-11

Sec. 11. (a) The voters of a political subdivision may initiate a proposed reorganization by filing a written petition, substantially in the form prescribed by the department, with the clerk of the political subdivision that:

(b) The clerk shall transmit the petition to the county voter registration office of the county in which a majority of the population of the political subdivision is located.  If the county voter registration office determines that the written petition is signed by at least five percent (5%) of the voters of the political subdivision, as determined by the vote cast in the political subdivision for secretary of state at the most recent general election, the clerk of the political subdivision shall certify the petition to the legislative body of the political subdivision.  In certifying the number of voters, the clerk shall disregard any signature on the petition that is dated under subsection (a)(3)(D) more than ninety (90) days before the date the petition was filed with the clerk.