APPLICABLE LEGAL PRINCIPLES
6 It is clear, as the ACCC and Cadbury acknowledge, that the common law of Australia and not the Evidence Act 1995 (Cth) governs the dispute. Unfortunately, in the circumstances of this dispute, the precise nature and scope of the common law legal professional privilege is, in a word, unclear. As will be seen, almost immediately, the cases are not consistent in approach, legal principle or result. The High Court has not yet had reason to reconcile the particular but differing statements that are found in the cases decided by trial and intermediate courts.
7 It is sufficient for present purposes to begin by stating that in order to maintain a claim of legal professional privilege, a proponent must demonstrate the communication is protected by "advice privilege" or "litigation privilege." The relationship between the two types of legal professional privilege is just one of the matters that is unclear in Australian privilege law. Some cases support the proposition that "litigation privilege is a separate category of legal professional privilege": Public Transport Authority of Western Australia v Leighton Contractors Pty Ltd [2007] WASCA 151 at [18]; See also R v King [2007] 2 NZLR 137; Westgold Resources NL v St Barbara Mines Ltd [2007] WASC 47; Mitsubishi Electric Australia Pty Ltd v Victorian Work Cover Authority (2002) 4 VR 332; Southern Equities Corporation Ltd v West Australian Government Holdings Ltd (1993) 10 WAR 1 and Dingle v Commonwealth Development Bank of Australia (1989) 23 FCR 63. On the other hand, it is also true that the "High Court has yet to make clear whether litigation privilege has an existence and rationale distinct from the advice privilege": eg, Leighton [2007] WASCA 151 at [20]; AWB Ltd v Cole (2006) 152 FCR 382; Ingot Capital Investments Pty Ltd v Macquarie Equity Capital Markets Ltd (2006) 67 NSWLR 91; Westpac Banking Corporation v 789Ten Pty Ltd (2005) 55 ACSR 519 and Pratt Holdings Pty Ltd v Commissioner of Taxation (2004) 136 FCR 357.
8 With respect to advice privilege it was, until recently, uncontroversial that the proponent had to establish three elements: (1) a confidential communication, (2) between a lawyer and client, (3) made for the dominant purpose of giving or receiving legal advice: see Commissioner of Australian Federal Police v Propend Finance Pty Ltd (1997) 188 CLR 501, 508-09 (stating that a confidential lawyer-client relationship is required) and Esso Australia Resources Ltd v Commissioner of Taxation (Cth) (1999) 201 CLR 49 at [61] (adopting the dominant purpose test). The Full Court of the Federal Court has now dispensed with the second requirement, holding that third-party communications may come within the ambit of advice privilege: Pratt Holdings (2004) 136 FCR 357 at [49], and [105].
9 However, the witnesses whose statements are at issue here had no express agreement or arrangement relating to confidentiality at the time the statements were made. Indeed, the ACCC's own witness in the present application confirmed that Amcor made no attempt to seek confidentiality: see [28] below. And it was not suggested that any implied agreement relating to confidentiality of communications between any of the witnesses and the investigators can be identified. It follows that advice privilege cannot attach to communications between the witnesses and investigators. And it also follows that no advice privilege inherently attaches to any documents (ie, the witness statements) summarizing those communications (which is not to say that privilege could never attach to copies or summaries of the communications depending on the purpose for which the copies or summaries were created: see Propend (1997) 188 CLR 501). Accordingly, a claim of advice privilege fails with respect to all three categories of disputed documents.
10 With respect to litigation privilege, on the other hand, the analysis is not so simple. It is clear that the privilege applies only to documents or communications if they are made or prepared (1) in anticipation of litigation (or during pending litigation) and (2) for the purpose of the litigation (eg, with a view to obtaining legal advice or evidence for use in the litigation): Leighton [2007] WASCA 151 at [12]. (That the documents in question here were all prepared at a time when litigation was anticipated or on foot was common ground.) A lawyer-client relationship is not required: Pratt Holdings (2004) 136 FCR 357. However, in contrast to the settled confidentiality requirement of the advice privilege, the authorities are divided as to whether litigation privilege may attach to communications (or documents summarizing communications) between a third-party, independent witness and a client even where they are not confidential: State of New South Wales v Jackson [2007] NSWCA 179 at [37] ("There is some controversy over the need for confidentiality in litigation privilege at common law, and the controversy is particularly material to privilege for communications between client and third party"); Leighton [2007] WASCA 151 at [21]-[30] (collecting and summarizing the conflicting authorities). The picture becomes even more complicated if one makes a further distinction, as some authorities do, based on whether such witness statements are found in the hands of the witness or in the hands of the lawyer: A Ligertwood, Australian Evidence (4th ed) at 291-92, quoted in Leighton [2007] WASCA 151 at [26].
11 It is at this point that the doctrinal relationship between the advice and litigation branches of the privilege becomes relevant. As McLure JA noted in Leighton, the "High Court has made numerous general statements which, on their face, are capable of applying to all categories of legal professional privilege, to the effect that the privilege only attaches to confidential communications": Leighton [2007] WASCA 151 at [22]. In fact, some of those general statements can be fairly read to support the view that confidentiality is required for all categories of legal professional privilege. For example, in remarks quoted by Brennan CJ in Propend (1997) 188 CLR 501 (at 508-09), Mason J stated in O'Reilly v State Bank of Victoria (1983) 153 CLR 1 at 22-23:
But if communications in written form are to be privileged they must still be confidential communications between solicitor and client made for the purpose of advice or for the purpose of use in existing or anticipated litigation.
Be that as it may, I agree with McLure JA that the High Court has never squarely confronted the issue, leaving the field open for lower courts to take opposing views.
12 As it turns out, however, the Court in this case is spared from having to enter the confidentiality thicket surrounding litigation privilege because of a concession made by Cadbury, "that [legal professional privilege] subsisted in each of the [Category II documents] immediately prior to [the documents] being served on Visy." In its oral submissions, Cadbury clarified that what had appeared earlier to be a separate argument - that the communications by which the ACCC effected service of the Category II documents, although they may have captured the substance of earlier privileged communications, were not themselves privileged - was not an attempt to qualify or otherwise place conditions on this concession. In reliance on this concession and clarification, the ACCC refrained from calling evidence about the circumstances in which the "communications" were served and it was agreed between the parties that the only issue to be resolved is whether the ACCC waived privilege when it, at the direction of the Court, filed the documents and served them on Visy.
13 The High Court looked at an aspect of waiver of legal professional privilege in Mann v Carnell (1999) 201 CLR 1. The test applied there was whether there was "conduct inconsistent with the maintenance of the confidentiality which the privilege is intended to protect": Mann v Carnell (1999) 201 CLR 1 at [29]. The High Court has not looked directly at the immediate question now in issue. And decisions of trial and intermediate courts both pre and post Mann v Carnell have looked at the question but have not spoken with one voice. On the one hand, there is a body of authority supporting the proposition that "statements or affidavits filed and served in proceedings, but not read in open court, remain … subject to legal professional privilege": Liberty Funding Pty Ltd v Phoenix Capital Ltd (2005) 218 ALR 283 at [15] (citing Nilsen Industrial Electronics Pty Ltd v National Semiconductor Corporation (1994) 48 FCR 337; State Bank of South Australia v Smoothdale Ltd (No 2) (1995) 64 SASR 224; Akins v Abigroup Ltd (1998) 43 NSWLR 539; Sevic v Roarty (1998) 44 NSWLR 287); Spotless Group Ltd v Premier Building & Consulting Pty Ltd [2006] VSCA 201; AMP Financial Planning Pty Ltd v CGU Insurance Ltd [2004] FCA 1196; Polyaire Pty Ltd v K-Aire Pty Ltd (2003) 226 LSJS 109 and ACCC v Telstra Corp Ltd (2000) 96 FCR 317.
14 Because the Category II (and Category III) documents were never read in open court, the ACCC relies upon this line of authority in support of its contention that the privilege remains intact.
15 On the other hand, there is also authority for the proposition that filing and service, without more, operates as a full or limited waiver: eg, Complete Technology Pty Ltd v Toshiba (Australia) Pty Ltd (1994) 53 FCR 125; Austress v Marlin [2002] NSWSC 958; Chief Executive Officer of Customs v Neate (1998) 144 FLR 373; Black & Decker Inc v Flymo Ltd [1991] 1 WLR 753; In the Marriage of Crowe [1988] FLC 91-983 and Leaders Shoes (Aust) Pty Ltd v National Insurance Co of New Zealand Ltd [1968] 1 NSWR 344. As one would expect, Cadbury relies on these cases. Cadbury also relies on Liberty Funding (2005) 218 ALR 283, where the Full Court of the Federal Court considered this conflicting authority. Although the Full Court did not formally decide the issue, it did suggest that the proper approach must recognize the distinction between legal professional privilege and the implied undertaking (with respect to the implied undertaking, see [19-22] below). The Full Court's criticism of the Smoothdale line of cases (at [25]) was in the following terms:
The difficulty with the approach in Smoothdale is highlighted by the approach of Barrett J in Austress Freyssinet Pty Ltd v Marlin International Pty Ltd [2002] NSWSC 958 in which his Honour distinguished cases such as Smoothdale on the basis that they were concerned with use in one proceedings of a statement or an affidavit filed and served in another. Barrett J, on the other hand, was dealing with the question whether a party could tender, as an admission, parts of an affidavit sworn by the opposing party in the same proceeding. Barrett J said, buttressed by ample authority, that this could be done, because it was within the range of permitted use - the purpose of the proceedings. Barrett J was undoubtedly correct. Thus, it is necessary to posit a limited waiver, within a broad framework of the conduct of proceedings, which may bring about the result (as in Austress) that it is in the other side's power to destroy the privilege entirely by putting the statement or affidavit into evidence or examining or cross-examining on its contents.
(Emphasis added.)
16 What was said by the Full Court may or may not be regarded as being dicta. I need not decide that question. The decision in Liberty Funding (2005) 218 ALR 283 was a decision of the Full Court of the Federal Court. The reasoning, if I may say so, is both persuasive and sensible. If it is conceded, as it must be, that a party upon whom a witness statement is served may use that statement in any way within the context of those proceedings (that is the whole reason why it is filed and served), it follows that it is conduct "inconsistent with the maintenance of the confidentiality which the privilege is intended to protect" (Mann v Carnell (1999) 201 CLR 1 at [29]) and an implied waiver of privilege has occurred. Indeed, if one follows the Full Court's reasoning to its logical conclusion, the filing and service operates as a complete, not simply limited, waiver of legal privilege.
17 To put the proposition in different terms, if "it is in the other side's power to destroy the privilege entirely," (see [15] above) it can no longer be said that the original holder can reasonably expect any continued confidentiality. In such circumstances, the existence of the privilege cannot be made to turn on whether the other side in fact places the document into evidence or uses it for examination - either legal privilege exists or it does not, and either the client controls it or they do not: Telstra Corporation Ltd v Minister for Communications, Information Technology and the Arts (No 2) [2007] FCA 1445 at [21] ("If a communication qualifies for legal professional privilege, the privilege is absolute. It cannot be overridden by some supposedly greater public interest. It can be waived by the person, the client entitled to it, and it can be overridden by statute, but it is otherwise absolute.") In other words, once it is found that the original holder of the privilege cannot control further dissemination of the document, the privilege is destroyed as a matter of law without further inquiry into whether the communication was in fact disseminated.
18 This is not to say that there could never be something less than a full waiver of privilege; rather, the point is that for there to be only a limited waiver, the original holder must still retain full control as to further dissemination of the document. So, for example, providing a witness statement to a party but subject to conditions that the party may use it only for internal purposes, may not read it in court, may not place it into evidence and may not otherwise rely on it in examination or the proceedings generally might constitute a limited waiver only: see Goldberg v Ng (1995) 185 CLR 83, 96 (stating that the waiver "can be limited so that it applies only in relation to particular persons, materials or purposes"); Goldman v Hesper [1988] 3 All ER 97 (cited in Mann v Carnell (1988) 201 CLR 1 at [29] for the proposition that disclosure "for a limited and specific purpose" will not lead to loss of the privilege).
19 Here, however, Visy was under no constraint as to the purposes for which it could use the witness proofs filed and later served on Visy by the ACCC. Visy did not need to, and did not, seek the permission of the putative privilege holder (the ACCC) to use the witness proofs or any part of them:
(1) by disclosure to its own witnesses, its lawyers and its officers;
(2) to instruct expert witnesses;
(3) to determine the evidence that might be given;
(4) to assess the merits of its defence of the ACCC proceedings;
(4) to draw subpoenas, notices to admit or other interlocutory or trial processes;
(5) in the preparation of cross examination of witnesses.
Although Visy was bound to limit its use of those statements to the context of the ACCC proceeding, the source of that limitation was its implied undertaking to the court, not any legal privilege held by the ACCC: see [20] below.