Hawaii Revised Statutes Division 1. Government § 327G-4

(a) A principal who has capacity at the time may revoke all or part of an advance mental health care directive, including the designation of an agent or alternate agents, at any time and in any manner that communicates intent to revoke. The principal shall give notice of the revocation to a health care provider, supervising health care provider, health care institution, agent, or guardian.

(b) A health care provider, agent, or guardian who is informed of a revocation shall promptly communicate the fact and extent of the revocation to the supervising health care provider and to any health care institution in which the principal is a patient or resident.

(c) A revocation is effective when notice of the revocation is received by the supervising health care provider or health care institution. The supervising health care provider or health care institution shall promptly record the fact and extent of the revocation, including the date and time of the revocation, in the principal's medical record.

(d) A decree of annulment, divorce, dissolution of marriage, or legal separation revokes a previous designation of a spouse as agent, unless otherwise specified in the decree or in the advance mental health care directive.

(e) An advance mental health care directive that conflicts with an earlier advance mental health care directive revokes the earlier directive to the extent of the conflict.