7 The Director-General further submitted that new expert witness evidence should not be admitted, because any new information can be conveyed more appropriately by amending the SEPP 1 objection. This case involves a SEPP 1 objection, not a more general assessment of a development application which is why the SEPP 1 objection should be amended in favour of allowing in new expert witness evidence.
8 Further, the Director-General submitted that the criteria for giving leave to allow alternative expert evidence must amount to more than a mere difference of opinion between the experts. The role of the parties is to give all relevant information to the Court appointed expert, and then for the expert to decide what to take into account. The Director-General further submitted that a party should not be allowed to adduce further evidence through an alternative expert on the basis that the Court appointed expert failed to attach sufficient weight to a matter. No unfairness would attach to the party towards whom the Court appointed expert's findings are adverse. Any unfairness would be a necessary consequence of the fact that having a Court appointed expert departs from the usual practice in an adversarial system.
Finding
9 The Court has not been provided with any case law by the parties in relation to the application in the Supreme Court of Pt 39 r 6 of the Supreme Court Rules, or similar provisions in other jurisdictions. This may be because there has not to date been much use of Court appointed experts so that there has been little application of Pt 39 r 6 by parties seeking to adduce additional expert evidence. There is only one authority relied on from this Court, Lloyd J in Crown Atlantis Joint Venture v Ryde City Council [2005] NSWLEC 303. That case concerned an appeal under s 56A of the Land and Environment Court Act 1979, against the decision of a Commissioner which allowed an additional expert town planning report to be tendered at the hearing when a Court appointed expert had also been appointed in the same discipline. The additional expert report raised issues outside those originally particularised. On appeal before Lloyd J, it was argued that this amounted to an error of law. His Honour dismissed the appeal, and held at [13]:
As noted above, when there is a Court appointed expert, a party to proceedings may not adduce evidence of any other expert on the question except with the leave of the court: SC Rules , Pt 39, r 6. In the usual course of events it is only the Court appointed expert whose evidence will be admissible on the question that has been referred to that expert for report; hence the need for leave to call any other expert. Typically, one would expect a court to grant leave where, for example, it may be alleged that there are some flaws in the methodology adopted by the court appointed expect, or where something may have been overlooked by the Court appointed expert. But the category of cases in which leave may be granted is not closed. The primary purpose for the appointment of a court expert is to provide assistance to the court. The court retains the discretionary power to grant leave to call another expert. The discretion to do so is unfettered. If the court is of the opinion that it will be assisted by the admission of evidence of another expert, then it may, in the exercise of its discretion, admit that evidence.