Montana Title 53. Social Services and Institutions § 53-21-1314. Duties of agent

(1) An agent shall act in good faith.

(2) An agent shall make health care decisions in accordance with the principal's written instructions or directive if any. When the agent must make decisions not addressed by the written instructions or directive, the agent shall base decisions on the principal's known wishes and upon the agent's best judgment about how the principal would decide based on the principal's own values and experience.

(3) An agent may resign by giving written notice to the principal. If the directive is in effect at the time of the resignation, the agent may resign by giving written notice to the supervising health care provider.