Sec. 9. As used in this chapter, "representative" means a person's:
(1) legal guardian or other court appointed representative responsible for making health care decisions for the person;
(2) health care representative appointed under IC 16-36-1-7;
(3) health care representative appointed under IC 16-36-7; or
(4) attorney in fact for health care appointed under IC 30-5-5-16.