65 ILCS 5/11-23-7
Every hospital established or purchased under this Division 23 shall be maintained for the benefit of the inhabitants of the city in which it is established who are sick, injured, or maimed. But every inhabitant of that city shall pay to the hospital board, or to such officer as it shall designate, reasonable compensation for occupancy, nursing, care, medicines, or attendance, according to the rules and regulations prescribed by the board. The hospital shall always be subject to such reasonable rules and regulations as the hospital board may adopt in order to render the use of the hospital of the greatest benefit to the greatest number. The board may exclude from the use of the hospital all inhabitants and persons who wilfully violate those rules and regulations. The board may extend the privileges and use of the hospital to persons residing outside of the city but within this state, upon such terms and conditions as the board may prescribe by its rules and regulations.
65 ILCS 5/11-23-7