225 ILCS 710/4
No person shall be qualified to hold the office of inspector while that person is an employee, director, or officer of any mining or metallurgical concern or company, or while directly or indirectly connected with any mining or metallurgical concern or company or copartnership operating in this State, either as partner or in any other capacity, or while engaged in private practice as a consulting engineer. The inspector shall devote his or her entire time to the duties of his or her respective office, and when not engaged in metal mines or other duties in connection therewith he or she may be assigned to any work under the supervision of the Director of the Office of Mines and Minerals, and it is unlawful for the inspector to be otherwise employed by the State of Illinois or to act directly or indirectly for or on behalf of any candidate for public office or for any political party, or receive compensation, either directly or indirectly, from any candidate for public office or from any political party in the State during the term of such inspector. Failure to observe the provisions of this Section shall render the inspector liable to immediate removal from office by the Director of the Office of Mines and Minerals without further cause shown and the Director of the Office of Mines and Minerals is authorized and empowered to make removals in such cases.
225 ILCS 710/4