The creditable service established under this Section shall be deemed eligible creditable service as defined in Section 14-110, and may be used for all purposes under this Article and the Retirement Systems Reciprocal Act, except for the computation of final average compensation under Section 14-103.12, or the determination of compensation under this or any other Article of this Code.
The age enhancement established under this Section may be used for all purposes under this Article (including calculation of a proportionate annuity payable by this System under the Retirement Systems Reciprocal Act), except for purposes of the level income option in Section 14-112, the reversionary annuity under Section 14-113, and the required distributions under Section 14-121.1. However, age enhancement established under this Section shall not be used in determining benefits payable under other Articles of this Code under the Retirement Systems Reciprocal Act.
If the member receives a lump sum payment for accumulated vacation, sick leave and personal leave upon withdrawal from service, and the net amount of that lump sum payment is at least as great as the amount of the contribution required under this Section, the entire contribution (or so much of it as does not exceed the contribution limitations of Section 415 of the Internal Revenue Code of 1986) must be paid by the employee before the retirement annuity may become payable. If there is no such lump sum payment, or if it is less than the contribution required under this Section, the member may either pay the entire contribution before the retirement annuity becomes payable, or may instead make an initial payment before the retirement annuity becomes payable, equal to the net amount of the lump sum payment for accumulated vacation, sick leave and personal leave (or so much of it as does not exceed the contribution limitations of Section 415 of the Internal Revenue Code of 1986), and have the remaining amount due deducted from the retirement annuity in 24 equal monthly installments beginning in the month in which the retirement annuity takes effect.
However, if the net amount of the lump sum payment for accumulated vacation, sick leave and personal leave equals or exceeds the contribution required under this Section, but the required contribution exceeds an applicable contribution limitation contained in Section 415 of the Internal Revenue Code of 1986, then the amount of the contribution in excess of the Section 415 limitation shall instead be paid by the annuitant in January of 1994. If this additional amount is not paid as required, the retirement annuity shall be suspended until the required contribution is received.
40 ILCS 5/14-108.4