(1) The authority 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, any interest accrued or to accrue to the date of redemption of such bonds and for any additional corporate purpose of the authority. 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 which relate to the issuance of bonds, insofar as such provisions may be appropriate therefor.
(2)  Refunding bonds may be sold or exchanged for outstanding bonds issued under this chapter and, if sold, the proceeds thereof may be applied, in addition to any other authorized purposes, to the purchase, redemption or payment of such outstanding bonds. Pending the application of the proceeds of any such refunding bonds, with any other available funds, to the payment of the principal, accrued interest, and any redemption premium on the bonds being refunded, and, if so provided or permitted in the resolution authorizing the issuance of such refunding bonds or in the trust agreement securing the same, to the payment of any interest on such refunding bonds and any expenses in connection with such refunding, such proceeds may be invested in such obligations as may be permitted for the defeasance of the outstanding bonds in the resolution or indenture under which they were issued.