The Governor shall include an appropriation in each annual State budget of monies in such amount as shall be necessary and sufficient, for the period covered by such budget, to pay the interest, as it shall accrue, on all Bonds issued under this Act and also to pay and discharge the principal of such of the Bonds as shall fall due during such period. To provide for the manner of repayment of the Transportation Bonds, Series A, a separate fund in the State Treasury called the “Transportation Bond, Series A Retirement and Interest Fund” is hereby created. The General Assembly shall annually make appropriations for monies to pay the principal of and interest on the Transportation Bonds, Series A from the Transportation Bond, Series A Retirement and Interest Fund and shall direct the transfer from time to time of monies from the Road Fund to the Transportation Bond, Series A Retirement and Interest Fund, an amount which shall be sufficient to pay the principal of and interest on the Transportation Bonds, Series A as the same become due. If there are insufficient funds in the Road Fund to pay the principal of and interest on the Transportation Bonds, Series A, as the same become due, the General Assembly shall direct the transfer from time to time of monies from the General Revenue Fund to the Transportation Bond, Series A Retirement and Interest Fund to the extent such transfer of monies is necessary to pay the principal of and interest on such Transportation Bonds, Series A which could not be paid by monies transferred from the Road Fund. To provide for the manner of repayment of the Transportation Bonds, Series B a separate fund in the State Treasury called the “Transportation Bond, Series B Retirement and Interest Fund” is hereby created. The General Assembly shall make appropriations for monies to pay the principal of and interest on the Transportation Bonds, Series B from the Transportation Bond, Series B Retirement and Interest Fund and shall direct the transfer from time to time of monies from the General Revenue Fund to the Transportation Bond, Series B Retirement and Interest Fund, an amount which shall be sufficient to pay the principal of and interest on the Transportation Bonds, Series B as the same become due.
     If for any reason the General Assembly fails to make appropriations for or transfers to the said Transportation Bond, Series A Retirement and Interest Fund and the Transportation Bond, Series B Retirement and Interest Fund, as the case may be, of amounts sufficient for the State to pay the principal of and interest on the Bonds as the same become due, this Act shall constitute an irrevocable and continuing appropriation of all amounts necessary for that purpose, and the irrevocable and continuing authority for and direction to the Auditor of Public Accounts, or Comptroller as his successor, and to the Treasurer of the State to make the necessary transfers out of and disbursements from the revenues and funds of the State for that purpose.
     All Bonds issued in accordance with the provisions of this Act shall be direct, general obligations of the State of Illinois and shall so state on the face thereof, and the full faith and credit of the State of Illinois are hereby pledged for the punctual payment of the interest thereon as the same shall become due and for the punctual payment of the principal thereof at maturity, and the provisions of this Section shall be irrepealable until all such Bonds are paid in full as to both principal and interest.