520 ILCS 5/1.19
All authorized employees of the Department are empowered, pursuant to law, to enter all lands and waters to enforce the provisions of this Act. Authorized employees are further empowered to examine all buildings, private or public clubs (except dwellings), fish markets, cold storage houses, locker plants, camps, vessels, cars (except sealed railroad cars or other sealed common carrier), conveyances, vehicles, watercraft or other means of transportation or shipping whatsoever, tents, game bags, game coats or other receptacles, and to open and examine any box, barrel, package, or other receptacle in the possession of a common carrier, which they have reason to believe contains wild birds or any part thereof (their nests or eggs), or wild mammals or any part thereof, taken, destroyed, bought, sold or bartered, shipped or held in possession contrary to any of the provisions of this Act, including administrative rules, or that the receptacle containing the same is falsely labeled.
All authorized employees of the Department shall be given free access to and shall not be hindered or interfered with in making such examination, and any license issued by the Department held by the person preventing such free access or interfering with or hindering such authorized employee shall be subject to confiscation by the Department; and no license or permit of any kind whatsoever shall be issued to such person for the period of one year thereafter.
Authorized law enforcement employees of the Department are empowered to conduct examination of equipment and devices in the field, pursuant to law, to ensure compliance with the provisions of this Act.
520 ILCS 5/1.19