40 ILCS 5/23-101
It is the purpose of this Code to restate, simplify and codify the respective Acts and parts of Acts repealed by Section 23--102 which immediately prior to the effective date of this Code governed the publicly supported retirement systems, annuity and benefit funds and related pension and benefit Acts. All such systems and funds shall remain separate and distinct entities. It is intended that this Code shall grant no lesser or greater rights, credits, equities, pensions or other benefits than existed under such Acts or parts of Acts so repealed and incorporated as separate Articles and Divisions of this Code, immediately prior to the effective date of this Code, except as they may be changed hereafter by specific amendment to this Code; and all such rights, credits, equities, annuities, pensions and other benefits are preserved without change, and without loss or impairment, precisely as if such Acts or parts of Acts had not been repealed.
In like manner, any rights in annuities, pensions or other benefits derived from and in force or which would have come into force under any Acts or parts of Acts repealed by Section 23--102 and not continued in any Article or Division of this Code shall be preserved without change, loss or impairment, precisely as if such Acts or parts of Acts had not been repealed.
The repeal of any Acts or parts of Acts specified in Section 23--102 shall not affect the validity of any taxes levied or extended under such Acts or parts of Acts, or of any appropriation ordinances adopted pursuant thereto, or of any warrants issued against and in anticipation of such taxes, nor shall the repeal of any Acts or parts of Acts validating and legalizing appropriation or tax levy ordinances, or both, affect the validity or operative force of such curative Acts or parts of Acts as enacted.
The repeal of any Act or parts of Acts specified in Section 23--102 shall not affect the validity of any act, decision, determination or other authority exercised by any retirement board, or other public officer or agency pursuant to the powers and duties conferred under such Acts or parts of Acts, nor shall such repeal affect the validity or course of any judicial or administrative proceeding or action undertaken and pending or completed on the effective date of this Code.
40 ILCS 5/23-101