11 The impact of the Evidence Act upon pre-trial gathering of evidence has been a matter of some controversy in previous decisions. However, the decision in Esso v Commissioner of Taxation [1999] HCA 67 and Mann v Carnell [1999] HCA 66 resolves the issue of the application of the Evidence Act to pre-trial ancillary proceedings. In Esso and Mann the High Court held that the applicable law was not to be found derivatively in the Evidence Act, but that the common law applies. The line of authority which applied Evidence Act provisions to pre-trial proceedings (for example, Telstra Corp v Australia Media Holdings (No 1) (1997) 41 NSWLR 277, Adelaide Steamship Co Ltd v Spalvins (1998) 81 FCR 360 and Akins v Abigroup (1998) 43 NSWLR 539)) has been overruled.
12 Consequently, the determination of an implied waiver or privilege is governed by the same principles of fairness as set out in cases such as Attorney General v Maurice (1986) 69 ALR 31, Goldberg v Ng (1995) 132 ALR 57 and subsequent case law. Very recently an illuminating article, Expert Evidence: Legal Professional Privilege and Experts' Reports by Paul Mendelow, appearing in (2001) 75 ALJ 258 came to my attention.
13 The starting point is the principle espoused in Maurice. Mason and Brennan JJ (at 487 and 488) stated:
"The limiting effect of legal professional privilege on the availability of evidence otherwise relevant is confined, inter alia, by the doctrine of waiver. A litigant can of course waive his privilege directly through intentionally disclosing protected material. He can also lose that protection through a waiver by implication. An implied waiver occurs when, by reason of some conduct on the privilege holder's part, it becomes unfair to maintain the privilege. The holder of the privilege should not be able to abuse it by using it to create an inaccurate perception of the protected communication."
14 Gibbs CJ ( at 484) put it another way:
"The case is not one in which the disclosure of a document, or the giving of evidence, without the disclosure of associated material, would give a partial or misleading picture, or would otherwise prejudice or embarrass the appellant in the conduct of the case."
15 The next significant, and arguably more relevant High Court decision was Goldberg. However, before Goldberg, there were two other decisions which are helpful because firstly, they dealt with the specific question of waiver of documents associated with expert medical reports, and secondly, they are part of the development of the common law in the interim between Maurice and Goldberg. The first was a decision of Foster J in the Federal Court in Dingwall v Commonwealth (1992) 39 FCR 521. The second was a decision of Olsson J in the Supreme Court of South Australia in Robinson v Adelaide International Raceway Pty Ltd & Ors (1993) 61 SASR 279.
16 In Dingwall Foster J dealt with a claim of implied waiver of privilege over documents that had actually been supplied to the medical expert. The basis of the application seemed to have been that the mere supply of the documents to the expert was enough to set up an implied waiver, notwithstanding that the expert himself had stated that he had not relied upon those documents. In the present case, it is common ground that the statements of the first and second defendants were never supplied to the expert. At best, only some extracts were provided. Foster J in Dingwall stated that:
"…[Maurice] cannot be regarded as authority for a wide principle that, whenever documents are sent to a potential witness as part of material being placed before him in order that he may provide a report … that those documents, ipso facto, although they had the protection of legal professional privilege, necessarily would lose it because of the doctrine of waiver [Maurice] does not go so far as that. It requires, certainly, that there be an indication that the documents were used in the preparation of the evidentiary document in a way that could be said to influence the content of that document."
17 Further, in a Federal Court decision Instant Colour Pty Ltd v Canon Australia Pty Ltd (unreported, Federal Court of Australia, 30 October 1995) R D Nicholson J held that a privilege had been waived in relation to a letter of instruction to an account expert. Under the heading "Sources of Information" contained in the revised report was stated that the report had been compiled from sources of information which the letter of instruction. During the course of cross examination it came critical to evaluate precisely what sources of information the expert was relying upon. The foundation of the knowledge of the expert was critical to a proper judicial evaluation of the report itself. R D Nicholson J tested the question of fairness in the following helpful day:
"The question of fairness can be tested in this way. If the letter of instruction confined the expert to preparing the report in a certain way and that instruction was not apparent because the letter remained subject to legal professional privilege, it is clear that no true understanding could be arrived at in relation to the foundation of the expert's knowledge. In my view, once it is said that the letter of instruction was something from which the report has been compiled, it cannot be the case that the reference to the letter of instruction falls within the principles Buttes case … It must be a reference which calls into play the aspects of fairness and results in an unintentional and implied waiver of privilege."
18 In Buttes Gas & Oil Co v Hammer (No 3) [1981] QB 223 it was held that a mere reference to document in a pleading does not waive privilege, but if it is reproduced in full then its confidentiality is gone and no question of privilege arises.
19 This line of reasoning was further supported by Aldous LJ in Bourns Inc v Raychem Corporation [1999] 3 All ER 154. In this case it was held that for there to be an implied waiver of client legal privilege, the documents cited in the expert report must not only be referred to, but must be relied upon. Aldous LJ at 166-67 stated:
"The principles of law are clear. Service of a witness statement, whether it be a statement … mere reference to a document does not waive privilege in that document: there must be at least reference to the contents and reliance. In the present case there was no reference and no reliance therefore no waiver."
20 In Robinson, Olsson J also referred to Maurice and confined its application to cases where the initial surrender of privilege over the "evidentiary" documents was voluntary. His Honour considered voluntariness was an essential pre-requisite of a Maurice type waiver of associated documents more importantly Olsson J considered that voluntariness, in the relevant sense, was not present when the expert report had been disclosed pursuant to procedural compulsion in the form of a rule of court which compelled parties to serve expert reports. This approach was supported by the New South Wales Court of Appeal's decision in Sevic v Roarty [1998] NSWSC 462.
21 The final two cases relied upon by the defendants are the High Court's decision of Goldberg and the decision of the Chief Justice of the Supreme Court of South Australia, Doyle CJ, in Cole v Dyer & Anor [1999] SASC 272. Both of these decisions are applications of, and refinements of the principles of fairness in Maurice.
22 In Goldberg the privilege holders (a solicitor, Goldberg, and his wife) were sued by the applicants (the Ngs) in equity proceedings. In respect of the matters which were the subject of the equity proceedings, the solicitor Goldberg had also been reported to his professional disciplinary body, the Law Society of New South Wales. In order to further his defence to the Law Society investigation, he supplied two proofs of evidence. It was found that this was voluntary and indeed a calculated move by Goldberg to demonstrate the reliability of his rebuttal of the complaints of the Ngs. In this way, Goldberg benefited in a very real way by the disclosure of the proofs to the Law Society. The High Court concluded it was unfair in those circumstances that Goldberg ought to be able to resist production of the proofs to the Ngs in the equity proceedings.
23 Cole also concerned the supply of documents by a defendant's solicitor in a personal injury action to a medical expert for use in connection with the preparation of a report. Doyle CJ at para 55 considered whether fairness required that these documents be disclosed to the applicant (plaintiff):
"The plaintiff's solicitors should be able to prepare adequately for trial with the material that they have. They know the facts drawn from [the defendant's] statements that apparently have been relied upon by the experts. I can find no unfairness in connection with the preparation for trial. It is possible, as it contemplated in some of the decisions referred to, that at trial the position will change. It might emerge that material not particularised has been relied upon. For some other reason it may become necessary to consider the whole of [the defendant's] statement. But that is a matter to be dealt with by the trial judge. So fairness in the sense of preparation for trial does not require that a waiver of privilege be imputed.
…
Looking at the matter more broadly, it does not appear to me that [the defendant's] solicitors have secured some advantage by the use of privileged material, which material they now seek to conceal. That was what happened in Goldberg . In the present case the only material important for the expert is the material relied upon by the expert as a basis for his opinion, and that material has been particularised."
24 It cannot be suggested that the plaintiff is the victim of unfairness in the sense of the term used in Maurice.