40 ILCS 5/11-170
For the one-year period beginning with the first pay period in January of each year the date when the funded ratio of the fund as determined in the annual actuarial valuation is first determined to have reached the 90% funding goal, and each subsequent one-year period thereafter for as long as the fund maintains a funding ratio of 75% or more, employee contributions for age and service annuity for those employees who made the election under item (i) of subsection (d-10) of Section 1-160 shall be 5.5% of each payment of salary. If the funding ratio falls below 75%, then employee contributions for age and service annuity for those employees who made the election under item (i) of subsection (d-10) shall revert to the lesser of: (A) the total normal cost, calculated using the entry age normal actuarial method, projected for the prior fiscal year for the benefits and expenses of the plan of benefits applicable to those members and participants who first became members or participants on or after the effective date of this amendatory Act of the 100th General Assembly and to those employees who made the election under item (i) of subsection (d-10) of Section 1-160, but not less than 6.5% of each payment of salary combined with the employee contributions provided for in subsection (b) of Section 11-134.1 and Section 11-174 of this Article; or (B) the aggregate employee contribution consisting of 9.5% of each payment of salary combined with the employee contributions provided for in subsection (b) of Section 11-134.1 and 11-174 of this Article. If the fund once again is determined to have reached a funding ratio of 75%, the 5.5% of salary contribution for age and service annuity shall resume. An employee who made the election under item (ii) of subsection (d-10) of Section 1-160 shall continue to have the contributions for age and service annuity determined under subsection (a) of this Section.
If contributions are reduced to less than the aggregate employee contribution described in item (ii) or item (B) of this subsection due to application of the normal cost criterion, the employee contribution amount shall be consistent for that fiscal year.
The normal cost, for the purposes of this subsection (a-5) and subsection (a-10), shall be calculated by an independent enrolled actuary mutually agreed upon by the fund and the City. The fees and expenses of the independent actuary shall be the responsibility of the City. For purposes of this subsection (a-5), the fund and the City shall both be considered to be the clients of the actuary, and the actuary shall utilize participant data and actuarial standards to calculate the normal cost. The fund shall provide information that the actuary requests in order to calculate the applicable normal cost.
For the one-year period beginning with the first pay period in January of each year after the date when the funded ratio of the fund as determined in the annual actuarial valuation is first determined to have reached the 90% funding goal, and each subsequent one-year period thereafter for as long as the fund maintains a funding ratio of 75% or more, employee contributions for age and service annuity for each employee subject to this subsection (a-10) shall be 5.5% of each payment of salary. If the funding ratio falls below 75%, then employee contributions for age and service annuity for each employee subject to this subsection (a-10) shall revert to the lesser of: (A) the total normal cost, calculated using the entry age normal actuarial method, projected for the prior fiscal year for the benefits and expenses of the plan of benefits applicable to those members and participants who first become members or participants on or after the effective date of this amendatory Act of the 100th General Assembly and to those employees who made the election under item (i) of subsection (d-10) of Section 1-160, but not less than 6.5% of each payment of salary combined with the employee contributions provided for in subsection (b) of Section 11-134.1 and Section 11-174 of this Article; or (B) the aggregate employee contribution consisting of 9.5% of each payment of salary combined with the employee contributions provided for in subsection (b) of Section 11-134.1 and Section 11-174 of this Article. If the fund once again is determined to have reached a funding ratio of 75%, the 5.5% of salary contribution for age and service annuity shall resume.
If contributions are reduced to less than the aggregate employee contribution described in item (ii) or item (B) of this subsection (a-10) due to application of the normal cost criterion, the employee contribution amount shall be consistent for that fiscal year.
Such deductions beginning on the effective date and prior to June 30, 1947, inclusive shall be made for a future entrant while he is in service until he attains age 65, and for a present employee while he is in service until the amount so deducted from his salary with interest at the rate of 4% per annum shall be equal to the sum which would have accumulated to his credit from sums deducted from his salary if deductions at the rate herein stated had been made during his entire service until he attained age 65 with interest at 4% per annum for the period subsequent to his attainment of age 65. Such deductions beginning July 1, 1947 shall be made and continued for employees while in the service.
40 ILCS 5/11-170