40 ILCS 5/6-128.1
Firemen who have retired prior to September 23, 1971 and firemen who retire after that and who served 20 or more years before retirement and whose pensions or annuities are less than $250 per month shall receive such additional sums as are required to provide to them a minimum pension or annuity of $250 per month, said minimum to be reached in three stages: $200 per month from and after the effective date; $225 per month beginning January 1, 1972; and $250 beginning January 1, 1973.
The minimum pensions and annuities established by this Section do not include any sums to be added to annuity payments by the automatic annual increases provided by Sections 6-164 and 6-164.1 and such annual increases shall be paid in addition to the minimum amounts specified in this Section.
40 ILCS 5/6-128.1