When a decisionmaker is needed for a patient who lacks decisional capacity as determined under 50-5-1302, the decisionmaker must be selected from the following available individuals in the order listed:
(1) a guardian appointed by the patient under 72-5-316 who has medical decisionmaking authority;
(2) an agent appointed by the patient in a medical durable power of attorney or an individual designated by the patient in an advance medical directive;
(3) a spouse of the patient;
(4) an adult child of the patient;
(5) a parent of the patient;
(6) a sibling of the patient;
(7) a trusted decisionmaker designated under 50-5-1310;
(8) a close friend of the patient who has a deep understanding of the patient's wishes; and
(9) any other proxy appointed under Title 50, chapter 5, part 13.