The agency may provide for the issuance of refunding bonds for the purpose of refunding any bonds then outstanding which have been issued 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 for any purpose of the agency. The issuance of such obligations, the maturities and other details thereof, the rights of the holders thereof, and the rights, duties, and obligations of the agency in respect of the same shall be governed by the provisions of this chapter which relate to the issuance of bonds, insofar as such provisions may be appropriate therefor.