Section 20137 - Bonds, issue, maturity, interest, etc(a) As evidence of the indebtedness herein authorized, bonds of the Commonwealth of Pennsylvania shall be issued from time to time for such total amounts, in such form, in such denominations, and subject to such terms and conditions of issue, redemption and maturity, rate of interest, not to exceed six per cent per annum, and time of payment of interest, as the Governor, Auditor General and State Treasurer shall direct.(b) All bonds issued under the authority of this act shall bear facsimile signatures of the Governor, Auditor General and State Treasurer, and a facsimile of the great seal of the Commonwealth of Pennsylvania, and shall be countersigned by two duly authorized officers of the duly authorized loan and transfer agents of the Commonwealth.(c) The principal and interest of such bonds shall be payable in lawful money of the United States. All bonds issued under the provisions of this act shall be exempt from taxation for State and local purposes.(d) Such bonds may be issued with or without interest coupons attached. In case interest coupons are attached, they shall contain facsimile signatures of the State Treasurer and the Auditor General.(e) The Governor, the Auditor General and the State Treasurer shall proceed to have the necessary bonds prepared and printed. The bonds, as soon as they are prepared and printed, shall be forthwith deposited with the duly authorized loan and transfer agent of the Commonwealth, there to remain until sold in accordance with the provisions of this act.1969, May 15, P.L. 40, No. 14, § 3.