30 ILCS 405/11
This Act shall go into full force and effect upon receiving at the general election at which it is submitted the majority of votes required by the Constitution. The provisions of this Act for the payment of the principal of such bonds at maturity and of the interest thereon annually or semi-annually, as it shall accrue, by authorizing the General Assembly to direct the transfer of funds in the General Revenue Fund to the Anti-Pollution Bond Retirement and Interest Fund for that purpose and by the direct annual tax upon real and personal property which has been levied and imposed herein for that purpose, shall be irrepealable until such debt and interest is paid in full, and for the making of such payments the full faith and credit of the State of Illinois is hereby pledged.
30 ILCS 405/11