The changes to this Section and Section 16-128 relating to military service made by Public Act 87-794 shall apply not only to persons who on or after its effective date are in service as a teacher under the System, but also to persons whose status as a teacher terminated prior to that date, whether or not the person is an annuitant on that date. In the case of an annuitant who applies for credit allowable under this Section for a period of military service that did not immediately follow employment, and who has made the required contributions for such credit, the annuity shall be recalculated to include the additional service credit, with the increase taking effect on the date the System received written notification of the annuitant's intent to purchase the credit, if payment of all the required contributions is made within 60 days of such notice, or else on the first annuity payment date following the date of payment of the required contributions. In calculating the automatic annual increase for an annuity that has been recalculated under this Section, the increase attributable to the additional service allowable under Public Act 87-794 shall be included in the calculation of automatic annual increases accruing after the effective date of the recalculation.
Credit for military service shall be determined as follows: if entry occurs during the months of July, August, or September and the member was a teacher at the end of the immediately preceding school term, credit shall be granted from July 1 of the year in which he or she entered service; if entry occurs during the school term and the teacher was in teaching service at the beginning of the school term, credit shall be granted from July 1 of such year. In all other cases where credit for military service is allowed, credit shall be granted from the date of entry into the service.
The total period of military service for which credit is granted shall not exceed 5 years for any member unless the service: (A) is validated before July 1, 1964, and (B) does not extend beyond July 1, 1963. Credit for military service shall be granted under this Section only if not more than 5 years of the military service for which credit is granted under this Section is used by the member to qualify for a military retirement allotment from any branch of the armed forces of the United States. The changes to this paragraph (3) made by Public Act 86-272 shall apply not only to persons who on or after its effective date (August 23, 1989) are in service as a teacher under the System, but also to persons whose status as such a teacher terminated prior to such effective date, whether or not such person is an annuitant on that date.
Any qualified member or annuitant may apply for credit under item (iii) or (iv) of this paragraph (5) without regard to whether service was terminated before June 27, 1997 (the effective date of Public Act 90-32) . In the case of an annuitant who establishes credit under item (iii) or (iv), the annuity shall be recalculated to include the additional service credit. The increase in annuity shall take effect on the date the System receives written notification of the annuitant's intent to purchase the credit, if the required evidence is submitted and the required contribution paid within 60 days of that notification, otherwise on the first annuity payment date following the System's receipt of the required evidence and contribution. The increase in an annuity recalculated under this provision shall be included in the calculation of automatic annual increases in the annuity accruing after the effective date of the recalculation.
Optional credit may be purchased under this paragraph (5) for periods during which a teacher has been granted a leave of absence pursuant to Section 24-13 of the School Code. A teacher whose service under this Article terminated prior to the effective date of Public Act 86-1488 shall be eligible to purchase such optional credit. If a teacher who purchases this optional credit is already receiving a retirement annuity under this Article, the annuity shall be recalculated as if the annuitant had applied for the leave of absence credit at the time of retirement. The difference between the entitled annuity and the actual annuity shall be credited to the purchase of the optional credit. The remainder of the purchase cost of the optional credit shall be paid on or before April 1, 1992.
The change in this paragraph made by Public Act 86-273 shall be applicable to teachers who retire after June 1, 1989, as well as to teachers who are in service on that date.
Credit for sick leave shall, at retirement, be granted by the System for any retiring regional or assistant regional superintendent of schools at the rate of 6 days per year of creditable service or portion thereof established while serving as such superintendent or assistant superintendent.
Any service credits granted under this Section shall terminate upon cessation of membership for any cause.
Credit may not be granted under this Section covering any period for which an age retirement or disability retirement allowance has been paid.
Credit may not be granted under this Section for service as an employee of an entity that provides substitute teaching services under Section 2-3.173 of the School Code and is not a school district.
40 ILCS 5/16-127