(a) A healthcare provider or healthcare institution acting in good faith and in accordance with generally accepted healthcare standards applicable to the healthcare provider or healthcare institution is not subject to civil or criminal liability or to discipline for unprofessional conduct for:
(1) Complying with a healthcare decision of a person apparently having authority to make a healthcare decision for a principal, including a decision to withhold or withdraw health care;
(2) Declining to comply with a healthcare decision of a person based on a reasonable belief that the person then lacked authority; or
(3) Complying with an advance directive that, to the knowledge of the healthcare provider or healthcare institution, was valid when made and has not been revoked or terminated.
(b) An individual acting as agent or surrogate under this subchapter is not subject to civil or criminal liability or to discipline for unprofessional conduct for healthcare decisions made in good faith.
(c) A person who designates a surrogate under this subchapter is not subject to civil or criminal liability or to discipline for unprofessional conduct for a designation made in good faith.