Section 105 ILCS 5/34A-509 - Discharge of Bonds(a) If the Authority shall pay or cause to be paid to the holders of all Bonds and coupons, if any, then outstanding, the principal of, redemption price, if any, and interest to become due thereon, at the times and in the manner stipulated therein and in the resolution authorizing the issuance of Bonds, then the covenants, agreements and other obligations of the Authority to the Bondholders shall be discharged and satisfied.(b) Bonds or coupons or interest installments for the payment or redemption of which moneys shall have been set aside and shall be held in trust by the trustee provided for in Section 34A-507 hereof or any paying agent for the Bonds (through deposit by the Authority of funds for such payment or redemption or otherwise) at the maturity or redemption date thereof shall be deemed to have been paid within the meaning and, with the effect expressed in paragraph (a) above. All outstanding Bonds of any series and all coupons, if any, appertaining to such Bonds shall, prior to the maturity or redemption date thereof, be deemed to have been paid within the meaning and with the effect expressed in such paragraph (a) above if (i) there shall have been deposited with such trustee or paying agent either moneys in an amount which shall be sufficient, or direct obligations of the United States of America the principal of and the interest on which, when due, will provide moneys which, together with the moneys, if any, deposited with such trustee or paying agent at the same time, shall be sufficient to pay, when due, the principal of, sinking fund installment or redemption price, if applicable, and interest due and to become due on said Bonds on and prior to the redemption date, sinking fund installment date, or maturity date thereof, as the case may be, and (ii) the Authority shall have given such trustee or paying agent in form satisfactory to it irrevocable instructions to publish a notice to the effect and in accordance with the procedures provided in the resolution authorizing the issuance of the Bonds. Neither direct obligations of the United States of America nor moneys deposited with such trustee or paying agent nor principal or interest payments on any such securities shall be withdrawn or used for any purpose other than, and shall be held in trust for, the payment of the principal or redemption price, if applicable, and interest on said Bonds.