(1) Any of the persons referred to in section 21(3) may, not later than 5 weeks from the date on which notice is given in accordance with that provision, notify the Director that he or she objects to the proposed registration.

(2) An objection shall be in such form as shall be specified under section 31A and shall be accompanied by such fee as shall be prescribed by regulations made under section 31 and may be made on one or more of the following grounds:

(a) that the co-decision-making agreement was not signed or witnessed in accordance with section 17;

(b) that the appointer lacks capacity to make a decision to enter into the co-decision-making agreement;

(c) that the appointer has capacity to make the relevant decisions which are the subject of the co-decision-making agreement without the assistance of a co-decision-maker;