Ind. Code § 3-11-1.5-32.5

Sec. 32.5. (a) This section applies to townships in a county containing a consolidated city.

(b) The legislative body of a township may not change the boundary of a legislative body district established under IC 36-6-6-2.5 after November 8 of the year preceding the year in which an election is held to elect township board members and before the day following the date on which an election is held to elect township board members.