Immunity.

A health-care institution, health-care practitioner, or health-care provider acting in good faith and in accordance with generally accepted health-care standards applicable to the health-care institution, health-care practitioner, or health-care provider is not subject to civil or criminal liability or to discipline for unprofessional conduct for: (1) Complying with a DMOST form signed by a health-care practitioner apparently having authority to make a DMOST for a patient, including a decision to withhold or withdraw health care; (2) Declining to comply with a DMOST form based on a belief that the health-care practitioner then lacked authority to sign a DMOST; (3) Complying with a DMOST form and assuming that the DMOST form was valid when made and has not been modified or voided; (4) Providing life-sustaining treatment in an emergency situation when the existence of a DMOST form is unknown; or (5) Declining to comply with a DMOST form because the DMOST form is contrary to the conscience or good faith medical judgment of the health-care practitioner or the written policies of the health-care institution.