The bonds of the authority shall be signed by its president and attested by its secretary and the seal of the authority shall be affixed thereto, and any interest coupons applicable to such bonds shall be signed by the president; provided, that a facsimile of the signature of one, but not both, of said officers may be printed or otherwise reproduced on any such bonds in lieu of his signing the same, a facsimile of the seal of the authority may be printed or otherwise reproduced on any such bonds in lieu of being manually affixed thereto and a facsimile of the president's signature may be printed or otherwise reproduced on any such interest coupons in lieu of his signing the same. Any bonds of the authority may be executed and delivered by it at any time and from time to time, shall be in such form and denominations and of such tenor and maturities, shall bear such rate or rates of interest, shall be payable at such times and evidenced in such manner, may contain provisions for redemption prior to maturity and may contain other provisions not inconsistent herewith, all as may be provided by the resolution of the board of directors whereunder such bonds are authorized to be issued; provided, that no bond of the authority shall have a specified maturity date later than 30 years after its date. All bonds of the authority having specified maturity dates more than 10 years after their date shall be made subject to redemption at the option of the authority not later than the end of the tenth year after their date, and on any interest payment date thereafter, under such terms and conditions as may be provided in the resolution or resolutions under which such bonds are authorized to be issued. Bonds of the authority may be sold from time to time as the board of directors may consider advantageous, but bonds of the authority must be sold only at public sale, either on sealed bids or at public auction, to the bidder whose bid reflects the lowest net interest cost to the authority for the bonds being sold, computed from their date to their respective maturities; provided, that if no bid acceptable to the authority is received, it may reject all bids. Notice of each such sale shall be given by publication in either a financial journal or a financial newspaper published in the City of New York, New York, and also by publication in a newspaper customarily published in the State of Alabama not less than five days during each calendar week, each of which notices must be published one time not less than 10 days before the date fixed for the sale. The board of directors may fix the terms and conditions under which such sale may be held; provided, that none of the bonds may be sold for a price less than the face value thereof; and provided further, that such terms and conditions shall not conflict with any of the requirements of this article. Approval by the Governor of Alabama of the terms and conditions under which any bonds of the authority may be issued shall be requisite to their validity. Such approval shall be entered on the minutes of the meetings of the board of directors at which the bonds are authorized and shall be signed by the Governor. Such approval by the Governor may be shown on any such bond by a facsimile of his signature printed or otherwise reproduced thereon, when authorization of such facsimile is contained in the said approval signed by him. The authority may pay out of the proceeds of the sale of its bonds all expenses, including fees of agents and attorneys, which the said board of directors may deem necessary or advantageous in connection with the issuance of such bonds. Bonds issued by the authority shall not be general obligations of the authority but shall be payable solely out of the funds appropriated and pledged therefor in Section 16-60-94. As security for the payment of the principal of and interest on the bonds issued by it, the authority is hereby authorized and empowered to pledge for payment of such principal and interest the funds that are appropriated and pledged in Section 16-60-94 for payment of such principal and interest. All such pledges made by the authority shall take precedence in the order of the adoption of the resolutions containing such pledges; provided, that any pledge for the benefit of refunding bonds that may be issued in compliance with the provisions of the fourth sentence of Section 16-60-92 shall have the same priority as the pledge for the benefit of the bonds refunded thereby. Contracts made and bonds issued by the authority shall be solely and exclusively obligations of the authority and shall not constitute or create an obligation or debt of the State of Alabama. Bonds issued by the authority shall be deemed to be negotiable instruments although payable solely from a specified source, as provided herein. All bonds issued by the authority and the income therefrom shall be exempt from all taxation in the State of Alabama. Any bonds issued by the authority may be used by the holder thereof as security for any funds belonging to the state, or to any instrumentality or agency of the state, in any instance where security for such deposits may be required by law. Unless otherwise directed by the court having jurisdiction thereof, or the document that is the source of authority, a trustee, executor, administrator, guardian or one acting in any other fiduciary capacity may, in addition to any other investment powers conferred by law and with the exercise of reasonable business prudence, invest fiduciary or trust funds in bonds of the authority. Neither a public hearing nor consent of the state Department of Finance or any other department or agency shall be prerequisite to the issuance of bonds by the authority.