30 ILCS 390/8
The Treasurer may, with the approval of the Governor, invest and reinvest any money in the School Construction Fund in the State Treasury which, in the opinion of the Governor communicated in writing to the Treasurer, is not needed for current expenditures due or about to become due from such funds. Such investments shall be made at the existing market price and in any event not to exceed 102% or par plus accrued interest, in obligations, the principal of and interest on which is guaranteed by the United States Government, or any certificates of deposit of any savings and loan association or State or national bank which are fully secured by obligations, the principal of and interest on which is guaranteed by the United States Government or secured by bonds of this State or any of its units of local government, school districts, or public community college districts or municipal bonds of other states, or bonds, notes or debentures of the Illinois Building Authority, Illinois Toll Highway Authority, or Illinois Housing Development Authority. Securities of other states and their political subdivisions shall not be accepted at an amount exceeding 90% of their market value. All securities shall be subject to acceptance only upon the approval of the Treasurer. The cost price of all such obligations shall be considered as cash in the custody of the Treasurer, and such obligations shall be conveyed at cost price as cash by the Treasurer to his successor. The money in the School Construction Fund in the form of such obligations shall be set up by the Treasurer as separate accounts and shown distinctly in every report issued by him regarding fund balances. All earnings received upon any such investment shall be paid into the School Construction Bond Retirement and Interest Fund. All of the monies other than accrued interest received from the sale of redemption of such investments shall be replaced by the Treasurer in the funds from which the money was removed for such investment.
No bank or savings and loan association shall receive public funds as permitted by this Section, unless it has complied with the requirements established pursuant to Section 6 of "An Act relating to certain investments of public funds by public agencies", approved July 23, 1943, as now or hereafter amended.
30 ILCS 390/8