(1)  The appointor of an enduring guardian may, by instrument in writing, revoke the appointment.

(2)  An instrument is not effective to revoke an appointment as enduring guardian unless –

(a) it is in accordance with Form 2 in Schedule 3 ; and

(b) there are at least 2 attesting witnesses to the instrument, neither of whom is a party to it nor a relative of a party to it and who have witnessed the instrument in the presence of the appointor and each other; and

(c) it is registered with the Tribunal.