105 ILCS 5/12-17
The County Clerk shall extend taxes to pay principal and interest of any outstanding bonds of a non-high school district issued to fund and pay unpaid tuition claims or judgments obtained by any school district against a non-high school district on unpaid tuition claims, as provided by each bond resolution on file in his office, against all the taxable property included within the said non-high school district as of the date of the said bonds, and the County Clerk shall extend taxes to pay principal and interest of any outstanding refunding bonds, as provided by each bond resolution on file in his office, against all of the taxable property included within said non-high school district as of the date of the bonds which were refunded thereby, and the County Clerk shall extend taxes for the payment of principal and interest of any refunding bonds hereafter issued, according to each such bond resolution on file in his office, against all the taxable property included within any non-high school district as of the date of the bonds of said District refunded thereby.
105 ILCS 5/12-17