Ind. Code § 8-15-2-12
(a) The exercise of the powers granted by this chapter will be in all respects for:
(c) The bonds issued under the provisions of this chapter, their transfer, and the income therefrom (including any profit made on the sale thereof) shall at all times be free from taxation within the state.
Formerly: Acts 1951, c.281, s.12. As amended by Acts 1980, P.L.74, SEC.238; P.L.109-1983, SEC.16.