(a) Consent given by a person is legally adequate if the person:
(1) is not a minor and has not been adjudicated incompetent to manage the person's personal affairs by an appropriate court of law;
(2) understands the information; and
(3) consents voluntarily, free from coercion or undue influence.
(b) The person giving the consent must be informed of and understand:
(1) the nature, purpose, consequences, risks, and benefits of and alternatives to the procedure;
(2) that the withdrawal or refusal of consent will not prejudice the future provision of care and services; and
(3) the method used in the proposed procedure if the person is to receive unusual or hazardous treatment procedures, experimental research, organ transplantation, or nontherapeutic surgery.