17. (1) Subject to the provisions of this section and section 18, a person who has attained the age of 18 years and who considers that his or her capacity is in question or may shortly be in question may appoint a suitable person who has also attained that age to jointly make with the first-mentioned person one or more than one decision on the first-mentioned person’s personal welfare or property and affairs, or both, in compliance with F23[this Part, regulations made under section 31 and specifications made under section 31A].

F24[(1A) A person in relation to whom a decision-making representation order was made in circumstances where section 38(1)(a) or section 55(4) applied may appoint a co-decision-maker in accordance with this section, and this Part and the regulations and specifications made thereunder shall apply to that appointment with any necessary modifications.]

(2) A person is suitable for appointment as a co-decision-maker if he or she—

(a) is a relative or friend of the appointer who has had such personal contact with the appointer over such period of time that a relationship of trust exists between them, and

(b) is able to perform his or her functions under the co-decision-making agreement.

(3) An appointment as a co-decision-maker shall be made in writing in a co-decision-making agreement that is in compliance with F23[this section, regulations made under section 31 and specifications made under section 31A].

(4) Notwithstanding the definition of “property and affairs” in section 2 an appointer shall not include in a co-decision-making agreement provision for the disposal of his or her property by way of gift.

(5) A co-decision-making agreement shall contain the following:

(a) the name, date of birth and contact details of the appointer;

(b) subject to subsection (6), the signature of the appointer and the date that he or she signed the agreement;

(c) the name, date of birth and contact details of the co-decision-maker;

(d) the signature of the co-decision-maker and the date that he or she signed the agreement;

(e) the signatures of the 2 witnesses referred to in subsection (7)(a).

(6) A co-decision-making agreement may be signed on behalf of the appointer by a person who has attained the age of 18 years and who is not the co-decision-maker or one of the witnesses referred to in subsection (7)(a) if—

(a) the appointer is unable to sign the agreement,

(b) the appointer is present and directs that the agreement be signed on his or her behalf by that person, and

(c) the signature of the person is witnessed in accordance with subsection (7)(b).

(7) (a) The appointer, or the person signing on his or her behalf in accordance with subsection (6), and the co-decision-maker shall sign the co-decision-making agreement in the presence of each other and in the presence of 2 witnesses—

(i) each of whom has attained the age of 18 years,

(ii) of whom at least one is not an immediate family member of the appointer or the co-decision-maker, and

(iii) neither of whom is an employee or agent of the co-decision-maker.

(b) Each of the witnesses referred to in paragraph (a) shall witness the signature of the appointer, or the person signing on his or her behalf, and the signature of the co-decision-maker by applying his or her own signature to the co-decision-making agreement.

(8) An appointer may appoint more than one person as a co-decision-maker but may not—

(a) appoint in the same co-decision-making agreement more than one person as a co-decision-maker, or

(b) appoint in a co-decision-making agreement a co-decision-maker in respect of a relevant decision which is the subject of another co-decision-making agreement.

(9) The Director shall, on a request being made of him or her by a person who intends to appoint a co-decision-maker or a person who is proposed as a co-decision-maker, or both, provide information to the person requesting with regard to making and entering into the co-decision-making agreement.

(10) In this section, “immediate family member” means—

(a) a spouse, civil partner, or cohabitant,

(b) a child, son-in-law or daughter-in-law,

(c) a parent, step-parent, mother-in-law or father-in-law,

(d) a brother, sister, step-brother, step-sister, brother-in-law or sister-in-law,

(e) a grandparent or grandchild,

(f) an aunt or uncle, or

(g) a nephew or niece.