Ind. Code § 5-1-14-2

Sec. 2. Any bonds, notes, or warrants, whether payable from property taxes, revenues, or any other source, issued by an entity enumerated in section 1(a) of this chapter may provide that the bonds, notes, or warrants may be payable before maturity from available funds and with such premiums as are set forth in the bonds, notes, or warrants. In addition, the bonds, notes, or warrants may provide that they may be registered as to principal or interest, or both, at the option of the holder, and upon such terms and conditions as are set forth in the bonds, notes, or warrants.