Indiana Code Title 36. Local Government § 36-9-25-16

Sec. 16. (a) If any bonds of the district are outstanding, and until they are fully paid, all property included within the district at the time the bonds were issued and sold remains subject to taxes levied and for its proportion of the indebtedness, notwithstanding that the property and territory may have been disannexed from the district.

(b) Any property in territory added to the district, as a condition of the special benefits it receives, becomes liable for its proportion of all taxes levied to pay all bonds of the special taxing district that are either outstanding or are later issued and sold.  The proportion of taxation shall be determined in the same manner as when territory is annexed to a municipality under IC 36-4-3.