Roads and Traffic Authority of New South Wales v Barrie Toepfer Earthmoving and Land Management Pty Ltd (No 3)

The case involved the Roads and Traffic Authority of New South Wales (RTA) and Barrie Toepfer Earthmoving and Land Management Pty Ltd (Toepfer), which was heard in the District Court of New South Wales. The dispute centred on the admissibility of evidence provided by an expert witness, specifically whether the expert witness code of conduct applied to the case and, if so, whether it affected the admissibility of the evidence. The issue arose from the refusal of the RTA to accept the expert witness's evidence in the court proceedings due to concerns regarding the expert's adherence to the code of conduct.

The primary legal issue before the court was whether the expert witness code of conduct applied to the case and, if it did, whether the evidence provided by the expert witness should be excluded from the proceedings. The court needed to determine if the expert witness was subject to the code and, if so, whether the failure to comply with the code rendered the evidence inadmissible. Additionally, the court had to assess the impact of any non-compliance on the overall admissibility and reliability of the evidence provided by the expert witness.

The court held that the expert witness code of conduct did apply to the case, and the expert witness was indeed subject to the code. However, the court found that the non-compliance with the code did not necessarily render the evidence inadmissible. The court emphasised that the primary consideration was the reliability and admissibility of the evidence, rather than strict adherence to the code. The court concluded that the evidence provided by the expert witness was reliable and relevant to the case and, therefore, should not be excluded. The court ruled in favour of Toepfer, allowing the evidence to be admitted in the proceedings.

The court's final orders included the admission of the expert witness's evidence in the case, and the proceedings continued with the full body of evidence available to both parties. The decision emphasised the importance of considering the reliability and relevance of expert evidence, rather than focusing solely on adherence to the expert witness code of conduct.