(1) An appointment may be made under rule 429L only if—(a) the appointing parties agree in writing on the following matters—(i) the issue arising in the proceeding the expert evidence may help resolve;(ii) the identity of the expert;(iii) when the report must be prepared by the expert and given to the appointing parties;(iv) liability for the fees and expenses payable to the expert; and(b) the expert has been made aware of the content of this part and consents to the appointment.
(2) A copy of the agreement must—(a) be signed by each of the appointing parties; and(b) as soon as practicable after being signed by the appointing parties, be served on any other party to the proceeding who is not an appointing party in relation to the expert.