60 ILCS 1/180-5

A township having a population of more than 125,000 and situated within a county having a population between 150,000 and 500,000, where the county operates and maintains a county home, infirmary, or hospital under Division 5-21 of the Counties Code, may lease the home, infirmary, or hospital from the county in a manner and upon terms it deems best for the interest of the township. The township may thereafter operate, maintain, improve, or expand the institution for the care and treatment of infirm or chronically ill persons or persons afflicted with dangerously communicable diseases, including poliomyelitis.