Principles
5 This is a question of discovery, so the common law applies rather than the Evidence Act 1995 (Cth): Esso Australia Resources Limited v Commissioner of Taxation (Cth) [1999] HCA 67; (1999) 201 CLR 49 at [16]. The basic principle, laid down in Mann v Carnell [1999] HCA 66; (1999) 201 CLR 1 at [29], is that an implied waiver of legal professional privilege arises if there is inconsistency between the conduct of the client whose privilege it is and maintenance of the confidentiality of the communications over which privilege is claimed. In assessing whether such inconsistency exists the Court will, where necessary, be informed by considerations of fairness, but the waiver does not come about by way of some overriding principle of fairness operating at large.
6 'Issue waiver', as the present kind of waiver is called, is a form of implied waiver: Commissioner of Taxation v Rio Tinto Limited [2006] FCAFC 86; (2006) 151 FCR 341 at [43]. Relevantly here, the waiver comes about because Vitruvian's conduct in pleading that it acted honestly in cancelling the shares is inconsistent with the continued confidentiality of certain legal advice, because Vitruvian's plea has necessarily put in issue the character or contents of that advice: see Rio Tinto at [54]. Or, as it was put in Telstra Corporation Ltd v BT Australasia Pty Ltd (1998) 85 FCR 152 at 168, where a party relies on a cause of action, an element of which is the party's state of mind, the party is taken to have waived privilege in respect of legal advice which the party had before or at the time of the relevant events that is material to the formation of that state of mind. Another way of describing what happens when there is an implied waiver may be found in the judgment of Allsop J (as he then was) in DSE (Holdings) Pty Limited v Intertan Inc [2003] FCA 384; (2003) 127 FCR 499 at [58]:
… the party entitled to the privilege makes an assertion (express or implied), or brings a case, which is either about the contents of the confidential communication or which necessarily lays open the confidential communication to scrutiny and, by such conduct, an inconsistency arises between the act and the maintenance of the confidence, informed partly by the forensic unfairness of allowing the claim to proceed without disclosure of the communication. …
(original emphasis)
7 However it is described, inconsistency is at the heart of the enquiry: Federal Treasury Enterprise (FKP) Sojuzplodoimport v Spirits International B.V. (No 6) [2019] FCA 337 at [24] (Stewart J); see also Poland v Hedley [2023] WASCA 69 at [76] (Quinlan CJ, Murphy and Beech JJA). Whether privilege has been waived does not involve any balancing of competing public interests: Telstra at 167. It is not an exercise of discretion. It is a conclusion of law when the necessary facts are established: Craine v Colonial Mutual Fire Insurance Co Ltd (1920) 28 CLR 305 at 326, quoted in Expense Reduction Analysts Group Pty Ltd v Armstrong Strategic Management and Marketing Pty Ltd [2013] HCA 46; (2013) 250 CLR 303 at [31].
8 That does not mean, however, that the waiver operates on every piece of legal advice which may have played a part in the formation of the state of mind: see Telstra at 167. It is true that it is not necessary for the client to specifically plead the advice or its contents; 'it may be sufficient that the client is making assertions about the client's state of mind, in circumstances where there were confidential communications likely to have affected that state of mind': Council of the New South Wales Bar Association v Archer [2008] NSWCA 164; (2008) 72 NSWLR 236 at [48] quoted with approval and emphasis in Macquarie Bank Limited v Arup Pty Limited [2016] FCAFC 117 at [32] (Middleton, Robertson and Gleeson JJ). It can be enough that the state of mind that is put in issue concerns an understanding of legal rights: see Vic Hotel Pty Ltd v DC Payments Australasia Pty Ltd [2015] VSCA 101 at [46]. But as the discussion of that case in Arup demonstrates (at [38]-[40]), and as the Full Court in Rio Tinto emphasised (at [58]-[59]), it always depends on the particular facts: see also Osland v Secretary to the Department of Justice [2008] HCA 37; (2008) 234 CLR 275 at [45]. Questions of waiver are matters of fact and degree: Osland at [49].
9 Where a party seeks to withhold only part of a document, for example by redacting it, the assessment of inconsistency is likely to include a consideration of whether or not the disclosed or undisclosed parts cover different subject matter. That is because, if they cover the same subject matter, disclosure of only part of the document may lead to the meaning or import of the disclosed part being distorted or inaccurately perceived: Spirits International at [25]. For reasons given by Stewart J in Spirits International (at [26]-[29]), the test is not so rigid as to require that the subject matter of the redacted part of a document must be entirely different to the subject matter of the unredacted part, if the redaction is to stand. But the extent of the difference will inform the assessment of inconsistency, as will any forensic unfairness in allowing a party to assert a particular case without disclosure of the communication in question.
10 Mr Sharif submits (written reply submissions paragraph 2):
Where material is deployed that would otherwise be privileged, the Court and the opposite party must have the opportunity to be satisfied that what the party has released from privilege represents the whole of the material relevant to the issues and not merely a fragment.
The submission is footnoted to Australian Competition and Consumer Commission v Prysmian Cavi E Sistemi Energia S.R.L. (No 10) [2015] FCA 763; (2015) 235 FCR 593 at [14]-[16] (Besanko J), which in turn (nested within quotes from other cases) quotes from and emphasises the importance of the following passage from Nea Karteria Maritime Co Ltd v Atlantic & Great Lakes Steamship Corporation (No 2) [1981] Com LR 138 where Mustill J said:
… where a party is deploying in court material which would otherwise be privileged, the opposite party and the court must have an opportunity of satisfying themselves that what the party has chosen to release from privilege represents the whole of the material relevant to the issue in question. To allow an individual item to be plucked out of context would be to risk injustice through its real weight or meaning being misunderstood.
11 But it would be unwise to, in turn, pluck that passage out of context, and elevate it to a principle giving the opposing party a right to scrutinise other potentially relevant material, or requiring production unless that party or the Court is satisfied that all relevant material has been produced. As is made clear above, mere relevance to an issue in the proceeding is not enough; certainly not the level of relevance that requires a document to be discovered: see Arup at [41]. Mustill J's observations were made in the context of a ruling on the effect of a party seeking to deploy part of a document in cross examination. Properly understood, the passage from Nea Karteria merely refers to the inconsistency that can arise when a party deploying (and so producing) privileged material does so selectively, and in a manner which does not permit the true import of the material deployed to be understood.
12 At the hearing before Colvin J, counsel for Mr Sharif accepted that in these circumstances, the Court and not the opposing party would inspect the documents. I have not inspected them by reference to some asserted principle that the test is whether the material produced 'represents the whole of the material relevant to the issue in question'. I have inspected them by reference to the principles I have summarised above.