Uniform Civil Procedure Rules 2005
Current version for 9 April 2020 to date (accessed 3 June 2020 at 14:26)
31.38   Instructions to parties’ single expert
(1)  The parties affected must endeavour to agree on written instructions to be provided to the parties’ single expert concerning the issues arising for the expert’s opinion and concerning the facts, and assumptions of fact, on which the report is to be based.
(2)  If the parties affected cannot so agree, they must seek directions from the court.