Montana Title 50. Health and Safety § 50-5-1311. Hierarchy of decisionmaker selection

(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.