New Mexico Statutes Chapter 24. Health and Safety § 24-7B-8. Decisions by guardian

A. A guardian shall comply with the protected person's individual instructions made while the protected person had capacity and may not disregard the protected person's preferences contained in an advance directive for mental health treatment unless the appointing court expressly so authorizes after notice to the agent, if any, and the protected person.  The court may disregard such preferences if it finds by clear and convincing evidence that the preferences do not accurately reflect the free choice of the protected person at the time of making the individual instructions or that the protected person revoked the individual instructions while the protected person had capacity pursuant to Subsection B of Section 24-7A-3 NMSA 1978.

B. A mental health treatment decision of an agent appointed by an individual having capacity takes precedence over that of a guardian, unless the appointing court expressly directs otherwise after notice to the agent and the protected person.

C. Subject to the provisions of Subsections A and B of this section, a mental health treatment decision made by a guardian for the protected person is effective without judicial approval, if the appointing court has expressly authorized the guardian to make mental health treatment decisions for the protected person, in accordance with the provisions of Sections 43-1-15 or 45-5-312 NMSA 1978, after notice to the protected person and any agent.