40 ILCS 5/8-216
Amounts contributed by the city for prior service annuity, widow's prior service annuity and minimum annuities, shall be credited to this reserve. All assets of any Municipal Pension Fund as herein defined in the city on the effective date, which were received by the board, and all assets of any municipal pension fund created under the Public School Employees' Pension Act of 1903, which were received by the board, shall also be credited to this reserve.
Prior service and widow's prior service annuities payable under this Article and all annuities, benefits and pensions, granted or which shall be granted to any employee by any such Municipal Pension Fund or School Employees' Pension Fund, and that part of any minimum annuity which is in excess of the age and service and prior service annuity shall be charged to this reserve.
If the balance of the investment and interest reserve is not sufficient to permit a transfer from that reserve to the annuity payment reserve of amounts necessary according to applicable mortality table and interest rate to make the balance of the annuity payment reserve equal to the liabilities chargeable thereto (including the present values of all annuities entered upon or fixed and of all annuities not entered upon), amounts necessary for such purpose shall be transferred from this reserve to the investment and interest reserve.
40 ILCS 5/8-216