As evidence of the indebtedness authorized by sections 108.900 to 108.914, there shall be issued, from time to time as occasion may require, bonds of the state of Missouri in the form of coupon bonds, which may be registrable as to principal or interest or both, or fully registrable bonds without coupons. They shall be issued in denominations of one thousand dollars each, or multiples thereof, and shall bear dates to be fixed by the board of fund commissioners. They shall bear such rate or rates of interest as may be determined by the board of fund commissioners. The interest thereon may be made payable as determined by the board of fund commissioners. The bonds shall be retired serially and by installments within a period not to exceed twenty-five years from their date of issue. Both principal of and interest on the bonds may be made payable at such place or places, in or out of the state of Missouri, as the board of fund commissioners may designate, and if made payable at any place other than the office of the state treasurer at Jefferson City, Missouri, the state treasurer is authorized and directed to pay all expenses incident thereto. Each separate issue of the bonds shall be given a series designation, either alphabetical or numerical as may be determined by the board of fund commissioners. For the prompt payment of principal of the bonds at maturity and the interest thereon as it falls due, the full faith, credit and resources of the state of Missouri are hereby and herein irrevocably pledged. All bonds issued under and by virtue of sections 108.900 to 108.914, shall be in such form as may be prescribed by the board of fund commissioners. The bonds may, in the discretion of the board of fund commissioners, be executed by the facsimile signature of the governor attested by the great seal of the state of Missouri, and the facsimile signature of the secretary of state and countersigned with the facsimile signature of the state treasurer, but all such bonds shall be executed by the genuine signature of at least one of the members of the board of fund commissioners. Any coupons attached to the bonds, evidencing the interest payments to be made thereon, shall be executed by affixing thereon the facsimile signature of the state treasurer. When directed so to do by the board of fund commissioners, the state auditor shall provide the bonds to be issued and lodge them with the state treasurer in whose custody and charge they shall remain until delivered to the purchaser thereof. The board shall, by resolution, provide a method for registering any of the bonds as the title thereto may be transferred, and for paying the interest thereon as it falls due, and the board shall exchange registered bonds or bonds payable to bearer whenever requested by the holders thereof. The bonds, signed, countersigned, endorsed and sealed, as provided in sections 108.900 to 108.914, when sold, shall be and constitute valid and binding obligations of the state of Missouri, although the sale thereof may be made at a date or dates after any officer whose signature is affixed thereto shall have ceased to be the incumbent of his office.