Section 520 ILCS 10/11 - 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 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) 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. P.A. 91-556, eff. 1/1/2000.