ILCS » Chapter 5 · Act 100
Illinois Compiled Statutes

5 ILCS 100/1-1 (2026)

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✓ current as of May 2026
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(5 ILCS 100/1-1) (from Ch. 127, par. 1001-1)
    Sec. 1-1. Short title. This Act may be cited as the Illinois Administrative Procedure Act.
(Source: P.A. 86-1475; 87-823.)

    
Notes of Decisions
Cited in 86 cases (19 in the last 5 years), 1993–2026 · leading case: Holzrichter v. Yorath, 2013 IL App (1st) 110287 (Ill. App. Ct. 2013).
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Holzrichter v. Yorath, 2013 IL App (1st) 110287 (Ill. App. Ct. 2013). · cites it 2× “Plaintiff also repleaded count V, with his prayer for relief requesting “compliance with Contested Case provisions of the Administrative Procedure Act (5 ILCS 100/1-1 et seq.) so rendering any decision made up to this point in the IDPR review process void pursuant to 5 ILCS…”
Nw. Illinois Area Agency on Aging v. Basta, 2022 IL App (2d) 210234 (Ill. App. Ct. 2022). · cites it 2× “In the complaint, plaintiff alleged that the Department had enacted administrative rules that were not adopted pursuant to the procedure mandated by the Illinois Administrative Procedure Act (Act) (5 ILCS 100/1-1 et seq. (West 2020)). Plaintiff sought the entry of an order…”
Morgan v. Dep't of Fin. & Prof'l Reg., 903 N.E.2d 799 (Ill. App. Ct. 2009). · cites it 3× “Plaintiff further asserts that numerous evidentiary rulings made by the ALJ during the hearing were erroneous.”
Alternate Fuels, Inc. v. Dir. of Illinois Env't Prot. Agency, 830 N.E.2d 444 (Ill. 2005). “Count II alleged that AFI was statutorily entitled to recoup all reasonable costs, including attorney fees, because the Agency's interpretation of "discarded material" constituted unauthorized rulemaking under the Illinois Administrative Procedure Act (5 ILCS 100/1-1 et seq.…”
Arangold Corp. v. Zehnder, 718 N.E.2d 191 (Ill. 1999). “(West 1996)), the Illinois Administrative Procedure Act (5 ILCS 100/1-1 et seq. (West 1996)), the Illinois Public Aid Code (305 ILCS 5/1-1 et seq.”
Noyola v. Bd. of Educ. of City of Chicago, 688 N.E.2d 81 (Ill. 1997). “They also assert that defendants' actions violate the requirements of the Illinois Administrative Procedure Act (5 ILCS 100/1-1 et seq. (West 1994)). For their relief, plaintiffs request a determination that defendants have violated the law and an order requiring defendants to…”
Nyhammer v. Basta, 2022 IL 128354 (Ill. 2022). “In this case, this court is asked to consider whether two agency decisions, both of which are committed to the agency’s discretion, require hearings under these provisions of the Illinois Administrative Procedure Act (Procedure Act) (5 ILCS 100/1-1 et seq. (West 2018)). For the…”
Kanerva v. Weems, 2014 IL 115811 (Ill. 2014). “¶ 13 To facilitate the implementation of the new system, Public Act 97-695 amended the Illinois Administrative Procedure Act (5 ILCS 100/1-1 et seq. (West 2012)) to permit the contributions paid by “the State, annuitants, survivors, retired employees, or any combination of those…”
Apple Canyon Lake Prop. Owners' Ass'n v. Illinois Com. Comm'n, 2013 IL App (3d) 100832 (Ill. App. Ct. 2013). “(West 2008)) and the Illinois Administrative Procedure Act (5 ILCS 100/1-1 et seq. (West 2008)) by: (1) refusing to consider comments posted by ratepayers on the Commission’s website and statements made by ratepayers at public forums regarding this water rate case; and (2)…”
Dotty's Cafe v. Illinois Gaming Bd., 2019 IL App (1st) 173207 (Ill. App. Ct. 2019). “Count VII alleged that the Board’s posting of the policy document on its website constituted improper rulemaking under the Illinois Administrative Procedure Act (5 ILCS 100/1-1 et seq. (West 2016)). The count sought a declaration that the policy document was invalid, an…”
Dep't of Revenue v. Civil Serv. Comm'n, 827 N.E.2d 960 (Ill. App. Ct. 2005). “The rules and regulations that state agencies promulgate under their respective enabling statutes are passed in accordance with the Illinois Administrative Procedure Act (5 ILCS 100/1-1 et seq. (West 2000)) and are compiled in the Administrative Code.”
Bartlow v. Costigan, 2014 IL 115152 (Ill. 2014). “Specifically, effective January 1, 2014, the Act has been amended to require written notice of the Department’s findings, provide a formal hearing under the Illinois Administrative Procedure Act (5 ILCS 100/1-1 et seq. (West 2012)), and subject a final decision to judicial…”
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