Hawaii Revised Statutes Division 1. Government § 327G-8

(a) A supervising health care provider, health care provider, or health care institution may subject the principal to mental health treatment in a manner contrary to the principal's preferences and instructions as expressed in an advance mental health care directive only:

(b) Neither an advance mental health care directive nor this chapter limits any authority either to take an individual into custody or to admit, retain, or treat an individual in a health care institution pursuant to part IV of chapter 334.