Any such refunding may be effected whether the bonds to be refunded shall have then matured or shall thereafter mature, either by sale of the refunding bonds and the application of the proceeds thereof for the payment of the bonds to be refunded thereby, or by the exchange of the refunding bonds for the bonds to be refunded thereby with the consent of the holders of the bonds so to be refunded, and regardless of whether or not the bonds to be refunded were issued in connection with the same facilities or separate facilities or for any other purpose hereunder, and regardless of whether or not the bonds proposed to be refunded shall be payable on the same date or different dates or shall be due serially or otherwise. The proceeds of any such bonds issued for the purpose of refunding outstanding bonds may, in the discretion of the authority, be applied to the purchase or retirement at maturity or redemption of such outstanding bonds either on their earliest or any subsequent redemption date or upon the purchase or at the maturity thereof and may, pending such application, be placed in escrow to be applied to such purchase or retirement at maturity or redemption on such date as may be determined by the authority. Any such escrowed proceeds, pending such use, may be invested and reinvested in obligations determined by the authority. The interest, income and profits, if any, earned or realized on any such investment may also be applied to the payment of the outstanding bonds or notes to be so refunded, to the payment of principal or interest on the refunding bonds or may be used by the authority in any lawful manner. After the terms of the escrow have been fully satisfied and carried out, any balance of such proceeds and interest, income and profits, if any, earned or realized on the investments thereof may be returned to the authority for use by it in any lawful manner. The portion of the proceeds of any such bonds issued for the additional purpose of paying all or any part of the cost of constructing and acquiring additions, improvements, extensions or enlargements of a facility may be invested and reinvested in obligations determined by the authority. The interest, income and profits, if any, earned or realized on such investment may be applied to the payment of all or any part of such cost or may be used by the authority in any lawful manner. All such bonds shall be subject to the provisions of this act in the same manner and to the same extent as other bonds issued pursuant to this act. All bonds and the interest coupons applicable thereto are hereby made and shall be construed to be negotiable instruments within the meaning of and for all the purposes of article 8, uniform commercial code, subject only to the provisions of such bonds, notes or other obligations for registration.
Idaho Code § 39-1449