Such bonds may be executed and delivered by the state at any time and from time to time, may be in such form and denominations and of such terms and maturities, may be in fully registered form or in bearer form registrable either as to principal or interest, or both, may bear such conversion privileges and be payable in such installments and at such time or times not exceeding twenty (20) years from the date thereof, may be payable at such place or places, whether within or without the State of Mississippi, may bear interest payable at such time or times and at such place or places and evidenced in such manner, and may contain such provisions not inconsistent herewith, all as shall be provided in the proceedings of the State Bond Commission under which the bonds are authorized to be issued. Such bonds shall not bear a greater overall maximum interest rate to maturity than that authorized by law for general obligation bonds. If deemed advisable by the State Bond Commission, there may be retained in the proceedings under which any such bonds are authorized to be issued an option to redeem all or any part thereof as may be specified in such proceedings, at such price or prices and after such notice or notices and on such terms and conditions as may be set forth in such proceedings and briefly recited or referred to on the face of the bonds, but nothing herein contained shall be construed to confer on the state any right or option to redeem any bonds, except as may be provided in the proceedings under which they shall be issued. Any such bonds shall be sold on sealed bids at public sale, and for such price as the State Bond Commission determines to be in the best interest of the State of Mississippi, but no such sale shall be made at a price less than par value plus accrued interest to date of delivery of the bonds to the purchaser. The state may pay all expenses, premiums and commissions which the State Bond Commission may deem necessary or advantageous in connection with the issuance thereof, but solely from the proceeds of the bonds. The issuance by the state of one or more series of bonds shall not preclude it from issuing other series of bonds, but the proceedings under which any subsequent bonds may be issued shall recognize and protect any prior pledge made for any prior issuance of bonds.