Ind. Code § 5-1-4-16
An Authority is hereby authorized to provide by resolution for the issuance of refunding bonds for the purpose of refunding any bonds then outstanding which shall have been issued by it under the provisions of this chapter, including the payment of any redemption premium thereon and any interest accrued or to accrue to the date of redemption of such bonds, and, if deemed advisable by such Authority, for the additional purpose of constructing improvements, extensions or enlargements of the project in connection with which the bonds to be refunded shall have been issued. Such refunding bonds shall be payable solely out of the revenues of the project (including any such improvements, extensions or enlargements thereto) to which the bonds being refunded relate. The issuance of such bonds, the maturities and other details thereof, the rights of the holders thereof and the rights, duties and obligations of the Authority in respect of the same, shall be governed by the provisions of this chapter insofar as the same may be applicable.
IC 5-1-4-16