“Advance health care directive”  includes: a designation of an agent to make health care decisions for an adult when the adult cannot make or communicate health care decisions; or an expression of preferences about health care decisions; may take one of the following forms: a written document, voluntarily executed by an adult in accordance with the requirements of this chapter; or a witnessed oral statement, made in accordance with the requirements of this chapter; and does not include a life with dignity order.^[3]