30 ILCS 230/2c
Every such officer, board, commission, commissioner, department, institution, arm or agency is authorized to demand and receive a bond and securities in amount and kind satisfactory to him from any bank or savings and loan association in which moneys held by such officer, board, commission, commissioner, department, institution, arm or agency for or on behalf of the State of Illinois, may be on deposit, such securities to be held by the officer, board, commission, commissioner, department, institution, arm or agency for the period that such moneys are so on deposit and then returned together with interest, dividends and other accruals to the bank or savings and loan association. The bond or undertaking and such securities shall be conditioned for the return of the moneys deposited in conformity with the terms of the deposit.
Whenever funds deposited with a bank or savings and loan association exceed the amount of federal deposit insurance coverage, a bond, pledged securities, or other eligible collateral shall be obtained. Only the types of securities or other eligible collateral which the State Treasurer may, in his or her discretion, accept for amounts not insured by the Federal Deposit Insurance Corporation or the Federal Savings and Loan Insurance Corporation under Section 11 of "An Act in relation to State moneys", approved June 28, 1919, as amended, may be accepted as pledged securities. The market value of the bond or pledged securities shall at all times be equal to or greater than the uninsured portion of the deposit unless the funds deposited are collateralized pursuant to a system established by the State Treasurer to aggregate permissible securities received as collateral from financial institutions in a collateral pool to secure State deposits of the institution that have pledged securities to the pool.
All securities deposited by a bank or savings and loan association under the provisions of this Section shall remain the property of the depositary and may be stamped by the depositary so as to indicate that such securities are deposited as collateral. Should the bank or savings and loan association fail or refuse to pay over the moneys, or any part thereof, deposited with it, the officer, board, commission, commissioner, department, institution, arm or agency may sell such securities upon giving 5 days notice to the depositary of his intention to so sell such securities. Such sale shall transfer absolute ownership of the securities so sold to the vendee thereof. The surplus, if any, over the amount due to the State and the expenses of the sale shall be paid to the bank or savings and loan association. Actions may be brought in the name of the People of the State of Illinois to enforce the claims of the State with respect to any securities deposited by a bank or savings and loan association.
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 230/2c