Section 279.09 - Refunding bonds(1) The authority may issue bonds to refund any outstanding bond, including the payment of any redemption premium on the outstanding bond and any interest accrued or to accrue to the earliest or any subsequent date of redemption, purchase, or maturity.(2) The authority may apply the proceeds of any bond issued to refund any outstanding bond to the purchase, retirement at maturity, or redemption of the outstanding bond on the earliest or any subsequent redemption date, upon purchase, or at the maturity of the bond. The authority may, pending application of the proceeds, place the proceeds in escrow to be applied to the purchase, retirement at maturity, or redemption of any outstanding bond at any time.(3) If the authority determines that it is necessary to amend the prior assessments in connection with the issuance of refunding bonds under this section, it may reconsider and reopen the assessments as provided in s. 279.07(11). If the assessments are amended, the refunding bonds shall be secured by, and be payable from, the assessments as amended. If the assessments are amended, all direct and indirect costs reasonably attributable to the refunding of the bonds may be included in the cost of the waterway improvements being financed.(4) All refunding bonds are subject to this chapter in the same manner and to the same extent as other bonds issued under this chapter.