225 ILCS 205/3
No such permit shall be granted by a fair board until it has investigated the carnival and is satisfied that, if permitted, it will be operated in accordance with the permit and the provisions of this Act. Such fair boards are authorized to issue the permit and to collect permit fees necessary to pay the expenses of the investigation and to aid in policing the grounds and otherwise to compensate the association in such amount as they may determine. Each permit shall contain the proviso that sheriffs and police officers shall have free access to the grounds and all booths, shows and concessions on such grounds at all times, and it shall be the duty of all officers present at such carnival to enforce all the provisions of this Act.
225 ILCS 205/3