Section 40 ILCS 5/9-171 - Additional contributions for age and service annuities for present employees, future entrants and re-entrants(a) From and after September 1, 1935, in addition to the contributions provided in Section 9--170 for each present employee described in subdivision (b) of Section 9--109 and each future entrant and each re-entrant described in subdivision (d) or (e) of Section 9--110, 3 1/4% of each payment of salary, not in excess of salary of $3,000 per year, shall be contributed by an employee for age and service annuity. Upon election by such employee made prior to September 1, 1935, any other integral multiple of 3 1/4% of such payment shall be contributed. The contributions shall be made as a deduction from salary and shall be continued while the employee is in service until the total of the amounts contributed for age and service annuity with interest at the effective rate is equal to the sum which would have accumulated under this Article because of contributions for age and service annuity if such contributions were made for such purposes during the entire periods of his service for such county or the retirement board under this Article and improved by interest at the effective rate.
(b) Concurrently with each such contribution, the county shall contribute 5 3/4% of each payment of salary, not in excess of $3,000 a year. Such contributions shall be made until the total of the amounts contributed by the county on behalf of such employee for age and service annuity with interest at the effective rate shall be equal to the sum which would have accumulated from county contributions for age and service annuity if contributions by the county had been made for such purposes during the entire periods of service in accordance with this Article and improved by interest to such time at the effective rate.