Under Utah law, Title 75 Chapter 2A, an Advance Healthcare Directive, which consists of two parts; the Living Will, through which you define the conditions under which you consent to receiving certain types of life-prolonging/terminating medical treatments, the second part is the Durable Power of Attorney for Health Care, where you name an Agent to make all your other health care decisions for you.
The usual candidate for this selection is your spouse, a relative, or your closest friends. In Utah, you can’t opt for your primary care physician, or many of the other individuals involved your medical treatment unless they are relatives.