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.
20 ILCS 301/45-55