This paragraph (A) does not apply to a person who first becomes a teacher under this Article on or after July 1, 2005.
For creditable service earned on or after July 1, 1998 by a member who has at least 24 years of creditable service on July 1, 1998 and who does not elect to augment service under Section 16-129.1: 2.2% of final average salary for each year of creditable service earned on or after July 1, 1998 but before the member reaches a total of 30 years of creditable service and 2.3% of final average salary for each year of creditable service earned on or after July 1, 1998 and after the member reaches a total of 30 years of creditable service; and
For all other creditable service: 2.2% of final average salary for each year of creditable service; or
The amount of the retirement annuity determined under this paragraph (B) shall be reduced by 1/2 of 1% for each month that the member is less than age 60 at the time the retirement annuity begins. However, this reduction shall not apply (i) if the member has at least 35 years of creditable service, or (ii) if the member retires on account of disability under Section 16-149.2 of this Article with at least 20 years of creditable service, or (iii) if the member (1) has earned during the period immediately preceding the last day of service at least one year of contributing creditable service as an employee of a department as defined in Section 14-103.04, (2) has earned at least 5 years of contributing creditable service as an employee of a department as defined in Section 14-103.04, (3) retires on or after January 1, 2001, and (4) retires having attained an age which, when added to the number of years of his or her total creditable service, equals at least 85. Portions of years shall be counted as decimal equivalents.
The minimum final average salary shall be considered to be $2,400 per year.
In the determination of final average salary for members other than elected officials and their appointees when such appointees are allowed by statute, that part of a member's salary for any year beginning after June 30, 1979 which exceeds the member's annual full-time salary rate with the same employer for the preceding year by more than 20% shall be excluded. The exclusion shall not apply in any year in which the member's creditable earnings are less than 50% of the preceding year's mean salary for downstate teachers as determined by the survey of school district salaries provided in Section 2-3.103 of the School Code.
40 ILCS 5/16-133