Chiara Rawlins
Principal
The recent decision in New Aim Pty Ltd v Leung [2023] FCAFC 67 (New Aim) has provided some useful guidance in relation to briefing experts in litigation.
Provided that lawyers do not seek to influence (or give the appearance of influencing) an expert’s opinion, it is permissible for lawyers to:
The rules of Court state that an expert witness is not an advocate for a party. The expert has a paramount duty, overriding any duty to the party to the proceedings or other person retaining the expert witness, to assist the Court impartially on matters relevant to the area of expertise of the witness.[2]
However, in many cases, each party will retain their own expert, which raises an obvious tension between the expert’s paramount duty and the party who pays their bills.
As such, parties and Courts approach expert evidence with caution. Anything that calls into question the expert’s independence can be fatal.
In this context, the process of briefing an expert is a delicate one.
It has become common litigation practice for lawyers to brief experts initially without a formal letter of instruction. Under this practice, a letter of instruction is not provided to the expert until after a draft report has been prepared and shortly before the report is finalised. Instead, there are usually verbal discussions between the instructing lawyer and expert as to the appropriate questions to be determined in the expert report before the letter of instruction is finalised.
The primary reasons for this practice are:
This practice was the subject of the recent appeal in New Aim.
In New Aim, the primary judge rejected the plaintiff’s expert report in its entirety because the judge could not be satisfied that the opinions expressed in the report truly represented the expert’s honest and independent opinions.
One of the issues raised by the primary judge was that the letter of instruction was provided to the expert the day before the report was finalised, and was drafted in a way that suggested the entire report was prepared within 24 hours. This practice of “inverting” the process of preparing a letter of instruction after consultation with an expert was criticised in BrisConnections Finance Pty Limited v Arup Pty Limited [2017] FCA 1268 at [71] where Lee J stated:
“The point of a letter of instruction being annexed to a report is not to act out a stylised ritual, but to provide to the Court with a transparent indication of what has been provided to the expert and the questions that the expert was actually asked to address. It should be able to be read literally without being silly. As is (at the very least) implicit in FCR 23, the work of the expert is to attend to the questions “the expert was asked to address”, not to invert the process by using the expert’s specialised knowledge in order to identify the questions that should have been asked and the assumptions that should have been given. The true instruction to Mr Veitch was oral and only emerged in the evidence on the voir dire. The integrity of the expert evidence process and the independence of experts is best facilitated by transparency in what is being asked of experts prior to, or at the time, they are forming their opinions and, if the questions need to change because they are misdirected, a record being made by way of supplementary instructions as to what has changed.”
The Full Court of the Federal Court in New Aim did not agree with the approach suggested in BrisConnections and stated that laboriously following such a process would likely result in increased costs and delay for the parties and ultimately a waste of the Court’s time.
Furthermore, the Court in New Aim stated that Rule 23 of the Federal Court Rules does not require every single question asked of the expert during the course of the expert’s retainer to be identified in their report. It only requires the report to identify the question the expert was asked to address in his or her report.
The Court in New Aim went on to provide the following guidance in respect of letters of instruction:
The primary judge in New Aim had criticised the involvement of the plaintiff’s lawyers in the process of drafting the expert’s report. The primary judge stated:
“What occurred in this case went far beyond the permissible scope of involvement of lawyers who retain an independent expert in order to give evidence in a proceeding. I reject the submission of counsel for the applicant that I should accept Ms Chen as an independent expert witness and that “the process by which her evidence was prepared is unremarkable.” For the reasons I have given, it most certainly was not. Even if in some circumstances it is proper for lawyers to draft an independent expert witness statement for consideration by the putative expert, that fact must be disclosed in the expert report conformably with the obligations that the expert assumes in accordance with the Expert Evidence Practice Note of this Court and the Harmonised Expert Witness Code of Conduct. And then, all correspondence relating to the manner of preparation of the report should be disclosed and, to the extent that oral advice is conveyed to the expert, the substance should be documented and disclosed. What occurred in this case should not be repeated.”
The Full Court of the Federal Court disagreed with several propositions in the above paragraph, as follows:
In this light, the following are some notable instances where Courts have found lawyers to have improperly influenced the preparation of expert evidence.
In Universal Music Australia Pty Ltd v Sharman License Holdings Ltd [2005] FCA 1242, a solicitor suggested an amendment to a sentence in an expert’s draft report. In response to the suggestion, the expert stated: “I was not aware of this, even after our testing. But if you say it is so then fine by me.“[5] The Court concluded based on this comment and other evidence that the expert was prepared seriously to compromise his independence and intellectual integrity and that it might be unsafe to rely upon the expert in relation to any controversial matter.
In Phosphate-Operative Company of Australia Ltd v Shears [1989] VR 665, a company engaged a prospective expert to prepare an independent accounting report as to whether a proposed scheme of arrangement was fair to its members: The prospective expert was engaged before any expert questions were identified for their opinion and was involved in discussions with the company’s officers and its legal advisers: A number of draft reports were prepared and changed after discussions with company officers and legal advisers, before a final report labelled as an independent expert report was provided to the members: [665]. The Court ultimately found at [686] that the expert report did not express an opinion genuinely held and was the result of an exercise carried out for the purpose of arriving at a desired result. At [680], the Court warned against independent experts from becoming too close with the people who brief them for danger of being regarded and regarding themselves as part of a “team”. Furthermore, the Court stated that it was undesirable for a prospective independent expert to disclose to their prospective employer their probable general approach.
It is not necessary to provide a letter of instruction to an expert when they are first briefed.
A letter of instruction to an expert may be provided contemporaneously with their report, after review of a draft report and discussion with the expert.
The involvement of lawyers in the preparation of expert evidence is a delicate but flexible exercise.
The overarching rule is that the lawyers must not seek to influence (or give the appearance of influencing) an expert’s opinion.
The need (and permissibility) for a lawyer’s involvement will depend on the type of expert evidence and the challenges of a particular report.
As a best practice, lawyers should not have any involvement in the preparation of parts of a report dealing with an expert’s opinion, so as to not give the impression that the opinion has been influenced.
However, a lawyer may assist to ensure the report is in admissible form, and to prepare factual aspects of a report on instructions from the expert.
[1] Jango v Northern Territory of Australia (No 3) [2004] FCA 1029 at [13]; Harrington-Smith on Behalf of the Wongatha People v Western Australia (No 7) (2003) 13 FCR 424; [2003] FCA 893 at [18]- [19].
[2] Clause 2 of the Harmonised Expert Witness Code of Conduct (Annexure A to the Federal Court of Australia’s Expert Evidence Practice Note). A similar provision can be found in Schedule 7 to the Uniform Civil Procedure Rules.
[3] ASIC v Southcorp Ltd (2003) 46 ACSR 438; [2003] FCA 804 at [21]; Prince Removal & Storage Pty Ltd v Roads Corporation [2012] VSC 245.
[4] [2022] NSWSC 261 at [153] and [194].
[5] At [228].