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20 ILCS 301/45-55

    (20 ILCS 301/45-55)
    Sec. 45-55. Powers and duties of designated agents.
    (a) It is hereby made the sole and exclusive duty of the Department, and its designated agents, officers and investigators, to investigate all violations of this Act, and to cooperate with all agencies charged with enforcement of the laws of the United States, or any state, concerning matters pertaining to this Act. Nothing in this Act shall bar a grand jury from conducting an investigation of any alleged violation of this Act. Any agent, officer, investigator or peace officer designated by the Department may:
        (1) execute and serve administrative inspection
warrants and subpoenas under the authority of this State.
        (2) make seizures of property pursuant to the
provisions of this Act.
        (3) perform such other duties as the Department may
    The Secretary may appoint such investigators as is deemed necessary to carry out the provisions of this Act. It shall be the duty of such investigators to investigate and report violations of the provisions of this Act. With respect to the enforcement of the provisions of this Act, such investigators shall have the authority to serve subpoenas, summonses and administrative inspection warrants. They shall be conservators of the peace and, as such, they shall have and may exercise during the course of an inspection or investigation all the powers possessed by policemen in the cities and sheriffs in the counties of this State, except that they may exercise such powers anywhere in the State.
    (b) The Department or its designated agents, either before or after the issuance of a license, may request and shall receive the cooperation of the Illinois State Police, county and multiple county health departments, or municipal boards of health to make investigations to determine if the applicant or licensee is complying with minimum standards prescribed by the Department.
(Source: P.A. 102-538, eff. 8-20-21.)