(1)  The Tribunal may, in giving consent to the carrying out of special treatment on a person to whom this Part applies, confer on the guardian of the person authority to consent–

(a) to the continuation of the treatment; or

(b) to the carrying out on the person of further special treatment of a similar nature.

(2)  The Tribunal may confer the authority only at the request, or with the consent, of the guardian.

(3)  The Tribunal may–

(a) impose conditions or give directions as to the exercise of the authority; or

(b) revoke the authority.

(4)  If the guardian has authority under this section, a person may request his or her consent to the carrying out of the relevant treatment.