Illinois Compiled Statutes

520 ILCS 10/11 (2026)

Conservation program; public policy; rules

✓ current as of May 2026

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(520 ILCS 10/11) (from Ch. 8, par. 341)
Sec. 11. Conservation program; public policy; rules.

(a) The Department, with the advice of the Board, shall actively plan and implement a program for the conservation of endangered and threatened species, by means which should include published data search, research, management, cooperative agreements with other agencies, identification, protection and acquisition of essential habitat, support of beneficial legislation, issuance of grants from appropriated funds, and education of the public.

(b) It is the public policy of all agencies of State and local governments to utilize their authorities in furtherance of the purposes of this Act by evaluating through a consultation process with the Department whether actions authorized, funded, or carried out by them are likely to jeopardize the continued existence of Illinois listed endangered and threatened species or are likely to result in the destruction or adverse modification of the designated essential habitat of such species, which policy shall be enforceable only by writ of mandamus; and where a State or local agency does so consult in furtherance of this public policy, such State or local agency shall be deemed to have complied with its obligations under the Illinois Endangered Species Protection Act, provided the agency action shall not result in the killing or injuring of any Illinois listed animal species, or provided that authorization for taking a listed species has been issued under Section 4, 5, or 5.5 of this Act. This paragraph (b) shall not apply to any project of a State agency on which a biological opinion has been issued (in accordance with Section 7 of the federal Endangered Species Act of 1973) prior to the effective date of this amendatory Act of 1985 stating that the action proposed by said project will not jeopardize the continued existence of any federal listed endangered or threatened species.

(c) The Department shall have the authority to adopt such rules as are reasonable and necessary to implement the provisions of this Act.

(Source: P.A. 104-417, eff. 8-15-25.)

Notes of Decisions

Cited in 8 cases, 1998–2015 · leading case: Glisson v. City of Marion, 720 N.E.2d 1034 (Ill. 1999).

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Glisson v. City of Marion, 720 N.E.2d 1034 (Ill. 1999). · cites it 5× “520 ILCS 10/11(a), (c) (West 1998). The Act, however, does not expressly confer standing on plaintiff to bring this private cause of action.”

Pierce Downer's Heritage All. v. Vill. of Downers Grove, 704 N.E.2d 898 (Ill. App. Ct. 1998). · cites it 6× “On May 6, 1996, Advocate requested a consultation with the IDNR pursuant to section 11 of the Illinois Endangered Species Protection Act (the Protection Act) (520 ILCS 10/11 (West 1996)). The IDNR subsequently expanded this consultation with Advocate to include a consultation…”

McHenry Cnty. Defenders, Inc. v. City of Harvard, 891 N.E.2d 1017 (Ill. App. Ct. 2008). · cites it 3× “, and Susan Hayden, brought an action under section 17 of the Illinois Natural Areas Preservation Act (Preservation Act) (525 ILCS 30/17 (West 2004)) and section 11(b) of the Illinois Endangered Species Protection Act (Endangered Species Act) (520 ILCS 10/11(b) (West 2004))…”

The Sierra Club v. The Off. of Mines & Minerals of the Dep't of Nat. Resources, 2015 IL App (4th) 140405 (Ill. App. Ct. 2015). “In a March 2012 e-mail, Malone informed Falter Mississippi Sand's surface-mining-permit application was reviewed in accordance with section 11 of the Illinois Endangered Species Protection Act (520 ILCS 10/11 (West 2012)), section 17 of the Illinois Natural Areas Preservation…”

McHenry Cnty. Defenders v. City of Harvard (Ill. App. Ct. 2008). · cites it 6× “, and Susan Hayden, brought an action under section 17 of the Illinois Natural Areas Preservation Act (Preservation Act) (525 ILCS 30/17 (West 2004)) and section 11(b) of the Illinois Endangered Species Protection Act (Endangered Species Act) (520 ILCS 10/11(b) (West 2004))…”

Glisson v. City of Marion (Ill. 1999). · cites it 3× “520 ILCS 10/11(a), (c) (West 1998). The Act, however, does not expressly confer standing on plaintiff to bring this private cause of action.”

Pierce Downer's Heritage All. v. Vill. of Downer's Grove (Ill. App. Ct. 1998). · cites it 3× “On May 6, 1996, Advocate requested a consultation with the IDNR pursuant to section 11 of the Illinois Endangered Species Protection Act (the Protection Act) (520 ILCS 10/11 (West 1996)). The IDNR subsequently expanded this consultation with Advocate to include a consultation…”

Sierra Club v. Off. of Mines & Minerals of the Dep't of Nat. Resources, 2015 IL App (4th) 140405 (Ill. App. Ct. 2015). “In a March 2012 e-mail, Malone informed Falter Mississippi Sand's surface-mining-permit application was reviewed in accordance with section 11 of the Illinois Endangered Species Protection Act (520 ILCS 10/11 (West 2012)), section 17 of the Illinois Natural Areas Preservation…”

— 520 ILCS 10/11(a) — 2 cases

Glisson v. City of Marion, 720 N.E.2d 1034 (Ill. 1999). “520 ILCS 10/11(a), (c) (West 1998). The Act, however, does not expressly confer standing on plaintiff to bring this private cause of action.”

Glisson v. City of Marion (Ill. 1999). “520 ILCS 10/11(a), (c) (West 1998). The Act, however, does not expressly confer standing on plaintiff to bring this private cause of action.”

— 520 ILCS 10/11(b) — 6 cases

Glisson v. City of Marion, 720 N.E.2d 1034 (Ill. 1999). “520 ILCS 10/11(a), (c) (West 1998). The Act, however, does not expressly confer standing on plaintiff to bring this private cause of action.”

Pierce Downer's Heritage All. v. Vill. of Downers Grove, 704 N.E.2d 898 (Ill. App. Ct. 1998). “On May 6, 1996, Advocate requested a consultation with the IDNR pursuant to section 11 of the Illinois Endangered Species Protection Act (the Protection Act) (520 ILCS 10/11 (West 1996)). The IDNR subsequently expanded this consultation with Advocate to include a consultation…”

McHenry Cnty. Defenders, Inc. v. City of Harvard, 891 N.E.2d 1017 (Ill. App. Ct. 2008). “, and Susan Hayden, brought an action under section 17 of the Illinois Natural Areas Preservation Act (Preservation Act) (525 ILCS 30/17 (West 2004)) and section 11(b) of the Illinois Endangered Species Protection Act (Endangered Species Act) (520 ILCS 10/11(b) (West 2004))…”

McHenry Cnty. Defenders v. City of Harvard (Ill. App. Ct. 2008). “, and Susan Hayden, brought an action under section 17 of the Illinois Natural Areas Preservation Act (Preservation Act) (525 ILCS 30/17 (West 2004)) and section 11(b) of the Illinois Endangered Species Protection Act (Endangered Species Act) (520 ILCS 10/11(b) (West 2004))…”

Glisson v. City of Marion (Ill. 1999). “520 ILCS 10/11(a), (c) (West 1998). The Act, however, does not expressly confer standing on plaintiff to bring this private cause of action.”

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