An acceptance of appointment as an appointed medical treatment decision maker must—
(a) be in writing on the same document as the appointment; and
(b) be signed by each appointee; and
(c) include a statement of acceptance by each appointee to the effect that the appointee—
(i) understands the obligations of an appointed medical treatment decision maker; and
(ii) undertakes to act in accordance with any known preferences and values of the person making the appointment; and
(iii) undertakes to promote the personal and social wellbeing of the person making the appointment, having regard to the need to respect the person's individuality; and
(iv) has read and understands any advance care directive that the person has given before, or at the same time as, the appointment; and
(d) be witnessed by an adult who certifies as to witnessing the signing of the acceptance.