755 ILCS 45/4-5: Limitations on health care agencies.

Neither the attending physician nor any other health care provider or health care professional may act as agent under a health care agency; however, a person who is not administering health care to the patient may act as health care agent for the patient even though the person is a physician or otherwise licensed, certified, authorized, or permitted by law to administer health care in the ordinary course of business or the practice of a profession.