Section 40 ILCS 5/18-153 - Duties of TreasurerThe Treasurer of the State of Illinois shall be ex-officio the Treasurer of the System and shall:
(1) act as official custodian of the cash and securities of the system, provide adequate safe deposit facilities for the preservation of such securities, and hold such cash and securities subject to the order of the board;(2) receive from the secretary all items of cash belonging to the system, as the same are transmitted by the secretary, including participants' contributions, State contributions, interest and principal on investments and other income accruing to the system, deposit all such amounts in a special trust fund for the account of this system, and notify the board of all such transactions at least once each month;(3) make payments for purposes specified in this Article upon warrants or direct deposit transmittals of the State Comptroller issued in accordance with vouchers signed by the secretary pursuant to resolutions of the board;(4) furnish a corporate surety bond acceptable to the board of such amount as the board designates. The bond shall indemnify the board against any loss which may result from any action or failure to act on the part of the Treasurer or any of his or her agents. All reasonable charges incidental to the procuring of the bond shall be paid by the board. Any cash accruing to the special trust fund representing the system not required for current expenditures shall be transferred to the Illinois State Board of Investment for purposes of investment. Until such transfer is made, those funds shall be invested temporarily by the Treasurer on behalf of the system and interest earned thereon shall be credited to the trust fund of the system.