515 ILCS 5/5-20
Any person taking or attempting to take aquatic life by means of any device within waters other than public waters of the State shall first obtain the consent of the owner, tenant, or designee of the owner or tenant of the premises where the taking is done or attempted to be done. In addition, the persons taking or attempting to take aquatic life on another's property shall do so in a manner that does not cause wanton or careless injury to or destruction of any real or personal property on the premises.
It shall be prima facie evidence that a person does not have the consent of the owner or tenant if the person is unable to demonstrate to the law enforcement officer in the field that consent had been obtained. This provision may only be rebutted by testimony of the owner or tenant that consent had been given. Before enforcing this Section, the law enforcement officer must have received notice from the owner or tenant of a violation of this Section. Statements made to the law enforcement officer regarding this notice shall not be rendered inadmissible by the hearsay rule when offered for the purpose of showing the required notice.
515 ILCS 5/5-20