In this chapter:
"interested person"—each of the following is an interested person in relation to a power of attorney:
(a) an attorney;
(b) the principal;
(c) a relative of the principal;
(d) the public advocate;
(e) the public trustee and guardian;
(f) a guardian of the principal;
(g) a manager of the principal;
(h) a person prescribed by
regulation.