(1) A co-decision-making agreement, whether registered or not, may be revoked in whole or in part at any time by the appointer or the co-decision-maker, or both.

(2) A revocation or revocation in part of a co-decision-making agreement shall be in writing and shall be in such form as shall be specified under section 31A.

(3) Subject to section 17(6), a revocation or a revocation in part of a co-decision-making agreement shall be signed by the person or persons making the revocation and each such signature shall be acknowledged by 2 witnesses and section 17(7) shall apply with the necessary modifications.

(4) Where a revocation or revocation in part is made after the co-decision-making agreement concerned has been registered, the person making the revocation shall notify the Director of the revocation or revocation in part, as the case may be, and the notification, which shall be in such form as shall be specified under section 31A, shall be accompanied by the following:

(a) a statement in writing by the person making the revocation outlining his or her reasons for the revocation;