Applicable PRINCIPLES
23 The approach of the primary judge was in accordance with established principles and correct on the basis of the evidence before him.
24 It was common ground that the common law applied to the present interlocutory application. As the primary judge acknowledged, the guiding principle to be applied in determining whether waiver of legal professional privilege occurs at common law is that stated in Mann v Carnell (1999) 201 CLR 1 ('Mann v Carnell'), wherein the majority held at [29]:
Waiver may be express or implied ....What brings about the waiver is the inconsistency, which the courts, where necessary informed by considerations of fairness, perceive, between the conduct of the client and maintenance of the confidentiality; not some overriding principle of fairness operating at large.
25 The governing principle that underpins implied waiver has undergone a process of judicial evolution. In Attorney-General (NT) v Maurice (1986) 161 CLR 475 at 481, 487, 492, 497, the High Court held that implied waiver occurs when, by reason of some conduct on the privilege holder's part, it becomes unfair to maintain the privilege. However, 'fairness' was subsequently abandoned as the touchstone of implied waiver by the High Court in Mann v Carnell.
26 The Full Court of the Federal Court applied Mann v Carnell in Commissioner of Taxation v Rio Tinto Ltd (2006) 151 FCR 341. In that case, the Court held at [52]:
...where issue or implied waiver is made out, the privilege holder has expressly or impliedly made an assertion about the contents of an otherwise privileged communication for the purpose of mounting a case or substantiating a defence. Where the privilege holder has put the contents of the otherwise privileged communication in issue, such an act can be regarded as inconsistent with the confidentially that would otherwise pertain to the communication.
27 As referred to by the primary judge, the Court further observed at [65]:
As the previous examination of the authorities shows, the question is not whether the Commissioner has put his state of mind in issue but whether he has directly or indirectly put the contents of the otherwise privileged communications in issue in the litigation, either in making a claim or by way of defence. Put another way, to adapt Allsop J's language in DSE, has the Commissioner (being the privilege holder) made an assertion as part of his or her case in the litigation that lays open the privileged documents to scrutiny, with the consequence that an inconsistency arises between the making of the assertion and the maintenance of the privilege?
28 The correct approach was succinctly described by Yates J in Ferella & Anor v Official Trustee in Bankruptcy (2010) 188 FCR 68 at [65] in the following terms:
...However the question is not simply whether the holder of the privilege has put that person's state of mind in issue but whether that person has directly or indirectly put the contents of the otherwise privileged communication in issue: see [Rio Tinto] at [65]. Indeed, even the fact that the holder of the privilege makes clear that the advice was relevant or contributed to a particular course of conduct would not be sufficient to waive the privilege unless, possibly, the contents of the legal advice (and not merely the fact of the advice) are specifically put in issue by relying on the contents of the advice to vindicate a claimed state of mind: [Rio Tinto] at [67].
29 In determining whether there has been an implied waiver of privilege, the Court's focus will be on whether there has been conduct that is inconsistent with the maintenance of confidentiality in the communication over which privilege is asserted. An assessment of whether there has been an implied waiver will be informed by considerations of forensic unfairness.
30 Whilst not to be treated as a statutory formulation, in DSE (Holdings) Pty Ltd v Intertan Inc (2003) 127 FCR 499 ('DSE'), Allsop J (as his Honour then was) described (at [58]) an implied waiver as arising when:
… 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.
31 As the primary judge recognised, a pleading of legal advice may be sufficient to give rise to a waiver of privilege, however a pleading is not necessary for waiver to occur. To this effect, in Hancock v Rinehart [2013] NSWSC 1978, Brereton J noted (at [22]) that the pleading in that case did not deploy or even refer to legal advice or its effect. His Honour noted that it was nonetheless open to conclude that privilege had been waived if other factors of the case warranted such a finding.
32 As stated in Council of the New South Wales Bar Association v Archer (2008) 72 NSWLR 236 at [48], by Hodgson JA, with whom Campbell JA agreed:
It is not enough to bring about a waiver of client legal privilege that the client is bringing proceedings in which the content of the privileged communications could, as a reasonable possibility, be relevant and of assistance to the other party. For the client to do this is not inconsistent with the maintenance of the privilege, and does not give rise to unfairness of the type in question. What would involve inconsistency and relevant unfairness is the making of express or implied assertions about the content of the privileged communications, while at the same time seeking to maintain the privilege. In this respect, 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.
(Emphasis added.)
33 It was contended by Macquarie that these principles have particular application where a party pleads its understanding of the legal effect of a contract or agreement. In this regard Macquarie relied upon Vic Hotel Pty Ltd v DC Payments Australasia Pty Ltd (2015) 321 ALR 191 ('Vic Hotel'), where the Victorian Court of Appeal found an implied waiver of privilege in a context where the pleaded allegation put in issue another party's state of mind as to the existence of legal rights. Dixon AJA (with whom Mandie and Beach JJA agreed) noted (at [46]):
I accept that merely putting a state of mind in issue will not, of itself, give rise to waiver of privilege in respect of legal advice that is relevant to the existence of the state of mind. But that is not this case. The state of mind that is put in issue concerns an understanding of legal rights, not simply knowledge of terms recorded in a contract.
34 It was contended by Macquarie that Arup's misleading or deceptive conduct claim put in issue Arup's understanding as to the effect of the relevant agreements, and the extent to which third parties could rely on Arup's traffic forecasts. In other words, the Cross-Claim could only succeed if Arup proves that it was of the view that BrisConnections were bound by the Engagement Agreement, and in particular, the Limitation of Liability.
35 This we accept, as did the primary judge (at [29] of the Reasons). However, it cannot be said that the question of reliance must have been informed by or addressed in the legal advice that Arup received. Arup's descriptions of the basis for its claims for legal professional privilege do not indicate such, which descriptions merely generically refer to 'legal advice in relation to the reliance statement in the [Engagement Agreement]', 'legal advice in relation to third party use of data', and 'legal advice in relation to the draft [NSBT Contract]'. There is no other evidence to indicate the extent of the legal advice; and certainly no evidence that the legal advice was likely or necessarily related to any question of reliance as pleaded in the Cross-Claim. It cannot be said that Arup necessarily 'la[id]… open to scrutiny' the advice that it received in relation to that matter, in the manner contemplated by Allsop J in DSE.
36 To the extent that Macquarie relied on the 'evaluative approach' (as described in Chen v City Convenience Leasing Pty [2005] NSWCA 297 and Wayne Lawrence Pty Ltd v Hunt [1999] NSWSC 1044), for the reasons given by Wigney J in Archer Capital 4A Pty Limited as trustee for the Archer Capital Trust 4A v Sage Group plc (No 3) (2013) 306 ALR 414 ('Archer Capital') at [16]-[23], the main focus should be on the test set out by the High Court in Mann v Carnell. As stated by Wigney J in Archer Capital at [22]:
In my opinion, there may be no difficulty with the evaluative approach in Wayne Lawrence and Chen if the questions that are posed are seen as no more than questions that might assist in determining the ultimate question, namely, whether the privilege holder has expressly or impliedly made an assertion about the contents of an otherwise privileged communication for the purpose of mounting a case or substantiating a defence. In my view, however, the questions have a tendency to distract or deflect attention from that test. The questions posed as part of the so-called evaluative approach should not be used as a surrogate for the expression of principle in DSE and Rio Tinto.
37 It may be accepted that the Cross-Claim puts in issue Arup's state of mind at the time it relied on the conduct of the Sponsor Group. Whilst the privileged documents might be relevant to that state of mind, it is settled that that fact alone will not result in a waiver of privilege: see, eg, Archer Capital at [24] and the authorities referred to at [18] and [31] of the Reasons.
38 Finally, we make further mention of the decision in Vic Hotel. The facts of that case are fundamentally different to those in this application for leave to appeal. In that case, DC Payments alleged that Vic Hotel repudiated its agreement with it by seeking to terminate the agreement before the expiry of the term: Vic Hotel at [13]. DC Payments also alleged that Next Payments induced Vic Hotel to breach their agreements with DC Payments by terminating those agreements before the expiry of the term: Vic Hotel at [13]. It was the allegation against Next Payments upon which the case turned.
39 DC Payments pleaded in paragraph 16 of its claim that 'Next Payments knew that Vic Hotel would be in breach of its obligations to the plaintiff under the Vic Hotel agreement if Vic Hotel' undertook particular conduct: Vic Hotel at [15]. Dixon AJA (with whom Mandie and Beach JJA agreed) held that implicit in this allegation about state of mind was the notion that the relevant terms of the agreements were capable of being breached by Vic Hotel because they were enforceable by DC Payment against Vic Hotel: Vic Hotel at [42]. In its defence, Next Payments sought to rely on legal advice received by DC Payments as to its agreement with Vic Hotel, in support of its pleading that DC Payments and Next Payments considered that the relevant terms of the agreement with Vic Hotel were not binding or enforceable: Vic Hotel at [15].
40 In Vic Hotel, DC Payments relied on evidence of Next Payments' state of mind, acquired by senior managers through communications between them and DC Payments, to prove its case. At the same time, DC Payments denied, by the assertion of legal privilege, the opportunity for Next Payments to prove its lack of the alleged state of mind acquired by the same senior managers in the same way: Vic Hotel at [58]. The allegations made by DC Payments align with the type of inconsistent conduct foreshadowed by the majority in Mann v Carnell. Similar to proceedings for professional negligence against that party's lawyer, DC Payments could not 'pick and choose, disclosing such incidents of the relationship as strengthen [its] claim for damages and concealing them from forensic scrutiny such incidents as weaken it': Paragon Finance Plc v Freshfields [1999] 1 WLR 1183, as cited in Vic Hotel at [51].