Montana Title 50. Health and Safety § 50-9-104. Revocation of declaration

(1) A declarant may revoke a declaration at any time and in any manner, without regard to mental or physical condition. A revocation is effective upon its communication to the attending physician, attending advanced practice registered nurse, or other health care provider by the declarant or a witness to the revocation. A health care provider or emergency medical services personnel witnessing a revocation shall act upon the revocation and shall communicate the revocation to the attending physician or attending advanced practice registered nurse at the earliest opportunity. A revocation communicated to a person other than the attending physician, attending advanced practice registered nurse, emergency medical services personnel, or health care provider is not effective unless the attending physician or attending advanced practice registered nurse is informed of it before the qualified patient is in need of life-sustaining treatment.

(2) The attending physician, attending advanced practice registered nurse, or other health care provider shall make the revocation a part of the declarant's medical record.