A healthcare provider, healthcare facility, or employee or agent of the healthcare provider or healthcare facility is not subject to civil or criminal liability or discipline for unprofessional conduct for:
(1) Complying with a physician order for life-sustaining treatment form based upon a good-faith assumption that the physician order for life-sustaining treatment form was valid when executed and that the physician order for life-sustaining treatment form was not revoked or terminated;
(2) Failing to comply with a physician order for life-sustaining treatment form based upon a good faith determination that: The physician order for life-sustaining treatment form was not valid; or
(3) The physician order for life-sustaining treatment form requires medically ineffective health care or health care contrary to generally accepted healthcare standards applicable to the healthcare provider or healthcare facility; or
(4) Declining to comply with an executed physician order for life-sustaining treatment form based upon religious beliefs or moral convictions if the healthcare provider or healthcare facility complies with the requirements of § 20-6-305.