Apparent Relevance
12 Although the parties referred to several authorities concerning the requirement for subpoenaed documents to have apparent relevance to an issue in a proceeding, in our opinion, the applicable principles are well established. The party issuing a subpoena bears the onus of demonstrating that the subpoena has a legitimate forensic purpose in relation to the issues in the proceedings: Santos Ltd v Pipelines Authority of South Australia (1996) 66 SASR 38 at 52. A subpoena may be set aside if it requires the production of documents which do not have apparent relevance to the issues arising on the pleadings: Trade Practice Commission v Arnotts Ltd (No 2) (1989) 88 ALR 90; Campaign Master (UK) Ltd v Forty Two International Pty Ltd (No 4) [2010] FCA 398; (2010) 269 ALR 76 at [39]-[40]; McHugh v Australian Jockey Club Limited [No 2] [2011] FCA 724 at [13]; McIlwain v Ramsey Food Packaging Pty Ltd [2005] FCA 1233; (2005) 221 ALR 785 at [35]; Dorajay Pty Ltd v Aristocrat Leisure Ltd [2005] FCA 558 at [17]. Other cases have used different terminology, but with essentially the same effect, for example, by requiring that, viewed realistically, the documents sought have a bearing on an issue which is not unreal, fanciful or speculative (R v Barton (1981) 2 NSWLR 414 at 420), or that the material sought is reasonably likely to add in some way to the relevant evidence in the case (Spencer Motors Pty Ltd v LNC Industries Ltd (1982) 2 NSWLR 921 at 927), or that it be "on the cards" that the documents sought will materially assist the party at whose request the subpoena has been issued: Allister v The Queen (1984) 154 CLR 404 at 414; Tamawood Ltd v Habitare Developments Pty Ltd [2009] FCA 364 at [13], [35]-[38].
13 In the present case, Jagot J considered that the test of apparent relevance was satisfied because evidence of the income of dermatologists from the practice of dermatology may be relevant to the assessment of Dr Sklavos' claimed economic loss.
14 In contending that this conclusion was wrong, the appellants referred to the intention of Dr Sklavos to provide the subpoenaed materials to a forensic accountant for analysis. They contended that the material sought did not satisfy the test of apparent relevance because:
There was no evidence about the identity, expertise or experience of the forensic accountant to whom the material is to be submitted;
There was no evidence that the proposed expert had asked for information of the kind now sought or that he or she would find it useful in providing a report relevant to Dr Sklavos' loss of earnings;
There was no evidence about the methodology which the expert would use with information derived from the material obtained under the subpoenas;
It is not clear how the recipients had been selected from the population of practising dermatologists;
It is not clear how a sample of 11 from that population could be statistically significant; and
It is not clear how earnings of dermatologists with different backgrounds, specialisations, work ethics and competence could be probative of Dr Sklavos' future earnings.
15 In our opinion, Jagot J was correct, for the reasons which she gave at [8], in concluding that the test of apparent relevance was met in this case. Her Honour said:
[8] ... The difference in income between what [Dr Sklavos] says he would have earned but for the unlawful conduct and what he will now earn if not admitted as a Fellow is an arguable category of loss. The income of other dermatologists may be relevant to that issue. I accept that I cannot now assess the ultimate probative value of the documents required to be produced. It may be that the accountant's opinions are ultimately of little weight because allowance has not or cannot be made for all of the potential differences between what would have been Dr Sklavos' position and the position of any of the 11 dermatologists who have received a subpoena. It may be that I am persuaded the sample is too small to be meaningful. None of these things can currently be known. What I do know now is that documents disclosing the income and expenditure of any dermatologist in Sydney may be relevant to Dr Sklavos' case in a manner which is not unreal, fanciful or speculative. That is sufficient to require production. It does not matter that the documents are sought for the purpose of provision to an expert. Apparent relevance does not require that the documents themselves be directly admissible. There is nothing improper in using the subpoena process for the purpose of obtaining documents relevant to expert evidence intended to be adduced in a proceeding.
16 We note, in addition, that the proof of loss of earning capacity in this case is similar to that which commonly pertains in personal injury litigation. Plaintiffs claiming economic loss as a result of an impairment of earning capacity will usually adduce evidence of the income which they could have expected to receive had their earning capacity not been compromised. If they would have exercised their earning capacity in occupations governed by industrial awards or agreements, or to which published pay scales are applicable, the evidence usually comprises the rates applicable under the relevant award, agreement or scale. But, when evidence of that kind is not available, it is common for such plaintiffs to lead evidence of the earnings of persons working in their area of occupation.
17 The decision of the Court of Appeal of NSW in Norris v Blake [No 2] (1997) 41 NSWLR 49, to which counsel for Dr Sklavos referred, provides an example. In that case, a badly injured young actor led evidence of the earnings from acting achieved by a number of his contemporaries.
18 Counsel for the appellants referred to authorities indicating that evidence of the earnings achieved by others may not always be necessary: National Instruments Pty Ltd v Gilles (1975) 49 ALJR 349; Kealley v Jones [1979] 1 NSWLR 723, and State of New South Wales v Moss [2000] NSWCA 133; (2000) 54 NSWLR 536. However, these decisions have no bearing on the question whether the material sought in the subpoenaed documents has apparent relevance to the assessment of damages for Dr Sklavos' claimed loss of earning capacity. The orthodox principles are those stated by Heydon JA in Moss:
[66] There are two uncontroversial themes running through the cases relating to the assessment of damages for injury to earning capacity. One is that in general it is desirable for precise evidence to be called as to what the plaintiff would have been likely to earn but for the injury and what the plaintiff is likely to earn after it. The second is that the failure to call such evidence does not necessarily result in selection of only a nil or nominal figure as damages for impaired earning capacity.
[67] Thus, in relation to the first of these themes, in Paff v Speed [1961] HCA 14; (1961) 105 CLR 549 at 559 Fullagar J said that the "usual method of proving damages under [this] head is by calling evidence to show what the plaintiff could probably have earned during the rest of his life if he had not been injured and what, if anything, he is now capable of earning". The same is true where the defendant is seeking to demonstrate that the diminution of earning capacity is only partial. …
(Emphasis added)
19 In short, plaintiffs should provide evidence of the earnings which, uninjured, they could have expected to receive, but a meritorious claim will not fail altogether because of their failure to do so.
20 The decision in Gilles is an example of the second of the themes to which Heydon J referred in Moss and the decision in Kealley an example of both. In the latter, Moffitt P said at 734:
[I]n quantifying loss due to diminution of earning capacity … while a Judge may look for the assistance of specific evidence on wages, there is a vast store of common knowledge that he is entitled to bring into account in assessing loss in personal injury cases. Judges of the Workers' Compensation Commission have long been accorded the right to resort to an immense fund of general knowledge concerning conditions of employment and rates of pay … Juries have long been accorded the right to use their common knowledge in relation to the employment consequences of injuries.
(Emphasis added)
In our opinion, the earnings of dermatologists from the practice of their speciality should not be regarded as an obvious matter of common knowledge of the kind to which Moffitt P referred in this passage.
21 It is true, as counsel for the appellants pointed out, that Moffitt P in Kealley went on to observe that sometimes, particularly in trials before a jury, evidence of claimed earnings can distract rather than assist. However, that observation does not deny the relevance of evidence of the earnings which an injured plaintiff may have expected to receive.
22 In short, it will be appropriate for Dr Sklavos to establish at trial the earnings which he might have achieved as a specialist dermatologist. The material which he seeks from the appellants has, at the least, apparent relevance to that issue as it bears on the earnings which specialist dermatologists may achieve at different stages of their careers. Evidence of the expertise of the proposed forensic accountant or of the manner in which the accountant will use the subpoenaed material was not necessary in this case to establish the apparent relevance of the documents sought.
23 It may well be that the probative value of the subpoenaed material, if tendered at trial, will be affected by other evidence including evidence, bearing on the specialised expertise, diligence, work ethic, competence and practices of Dr Sklavos, on the one hand, and each of the 11 appellants on the other. However, the circumstance that there may be evidence of differences of this kind does not deprive the material sought by Dr Sklavos of apparent relevance at this stage to an issue in the trial.
24 Counsel for the appellants referred to two cases, said to be analogous to the present, in which subpoenas had been set aside.
25 In McHugh v Australian Jockey Club Limited (No 2) [2011] FCA 724, Robertson J set aside a subpoena seeking production of documents relating to earlier proceedings in this Court between a tax payer and the Commissioner of Taxation, as well as the tax returns of the tax payer for five tax years. Robertson J considered that there was "a lack of fit" between what was sought by the subpoena and the issues in the substantive action. Plainly, that conclusion turned on the precise factual issues arising in McHugh. Robertson J did not elaborate the finding of "a lack of fit" and, accordingly, this aspect of the decision in McHugh is of little utility for present purposes.
26 The proceedings in In the matter of North Coast Transit Pty Ltd [2013] NSWSC 1912 concerned claims for relief under ss 233 and 461 of the Corporations Act (2001) (Cth). These included a claim that the shares of North Coast in the Busways Group be purchased by other shareholders in that group. Members of the Busways Group were engaged in the provision of bus services pursuant to contracts with Transport NSW. Some of the defendants, described by Black J as the "Active Defendants", issued subpoenas to Transport NSW seeking copies of four contracts into which it had entered, following tender, with other bus operators. The Active Defendants submitted that the four contracts sought were relevant to the determination of the market value of the shares in the Busways Group as that determination required, it was said, an assessment to be made of the profits which the Busways Group could reasonably be expected to make in the future, from routes which might become available to them.
27 Black J set the subpoenas aside for a number of reasons. First, his Honour considered that the market value of the Busways Group was to be assessed, in accordance with established principle, by reference to the amount which a willing but not anxious seller and a willing but not anxious purchaser would negotiate with one another. Such hypothetical persons would not have access to the contracts between Transport NSW and other bus operators: at [27]. Secondly, the Active Defendants had not provided a logical explanation for the selection of the particular contracts sought by the subpoenas. The Busways Group had never had a contract in respect of one of the regions to which the subpoenas related, and there was no evidence indicating why the contracts for the particular regions sought by the subpoena would cast greater light on the future market value of the Busways Group than would production of the contracts for any other region: at [29]. The apparent randomness of the selection undermined the prospect that the material sought could be "probative" of the market value of the Busways Group: at [29]. Thirdly, Black J considered that evidence of the terms of the four contracts could not provide any rational basis for prediction of the likelihood that a particular operator would gain or lose the contract in a different area: at [32]. Finally, Black J referred to the absence of evidence of the expertise of the expert retained by the Active Defendants to express opinions of the kind proposed by the Active Defendants: at [33]-[42].
28 Plainly, the decision in North Coast turned on its own facts. It is not an authority, as the appellants seem to suggest, that subpoenas of the present kind will be set aside unless the selection of the particular recipients is justified by evidence that they constitute a proper representative sample, or that the expertise of the expert retained to evaluate the materials sought must be established, or that relevant similarities between the circumstances of the subpoena recipients and those of the parties seeking production of the material must be established. These matters may of course be relevant in the circumstances of a given case, but they are not conclusive or necessarily required to be established in each case.
29 For these reasons, we consider that the first ground of appeal fails.