§ 16

In those instances that a health care proxy has not been executed, nothing herein shall preclude a health care provider from relying upon the informed consent of responsible parties on behalf of incompetent or incapacitated patients to the extent permitted by law.\nNothing in this chapter shall invalidate a power of attorney delegating the authority to make health care decisions executed prior to the enactment of this chapter.\nA competent adult's failure to appoint a health care agent or to provide the agent with specific health care instructions pursuant to this article shall create no presumptions regarding the adult's wishes about health care.