Section 40 ILCS 5/2-145 - TreasurerThe State Treasurer shall be ex-officio the treasurer of the system and shall:
(1) Act as official custodian of the cash and securities of the system and 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, including participants' contributions, State contributions, interest and principal on investments and other income accruing to the system, and deposit all such amounts in a special trust fund for the account of the system;(3) Make payments for purposes specified in this Article upon warrants or direct deposit transmittals of the State Comptroller drawn in accordance with vouchers signed by the secretary pursuant to resolutions of the board;(4) Submit to the board at least once each month a statement of all receipts for the account of the system and all payments chargeable to the system;(5) Furnish a corporate surety bond acceptable to the board in such amount as the board shall designate. The bond shall indemnify the board against any loss which may result from any action or omission of the Treasurer or any of the Treasurer's agents. All reasonable charges incidental to the procuring and giving of the bond shall be paid by the board. Any cash accruing to the system not required for current expenditures by the system 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.