The decisions of the High Court in Attorney-General for the Northern Territory v Maurice and Goldberg v Ng are cases concerning imputed waiver of privilege. In each case the party whose privilege was in issue had made some relevant use of the privileged material: the issue was whether such use constituted an implied waiver of the privilege. The High Court held in each case that such issue was to be determined by reference to considerations of fairness, and not by reference to the actual intention of the party who had made use of the material.
A similar approach was taken by the Court of Appeal in Benecke v National Australia Bank (1993) 35 NSWLR 110. In that case Gleeson CJ at 111-112 stated:
"The law permits the search for truth in legal proceedings to yield, in certain circumstances, to the public interest in publicising the secrecy of communication between lawyer and client. In the present case, however, the appellant herself lifted the veil of secrecy by giving the version of the communications. Thereafter there was no reason in principle why the pursuit of the truth should not take its course, or why the Court should be inhibited in seeking to ascertain the true facts concerning those communications."
The other cases referred to above are not cases in which there had been partial disclosure of a privileged communication or other use of such a communication. They are rather cases in which, unless waiver of such privilege was imputed to a party, the fact finding task of the court with respect to issues raised by that party would have been compromised. It was contended by senior counsel for the BT parties that the decisions in those cases are not supported by High Court authority.
We accept that such cases are not directly supported by Attorney-General for the Northern Territory v Maurice and Goldberg v Ng. However, they are, in our view, supported by the principles behind the undue influence and legal professional negligence cases.
A party who initiates an undue influence case puts in issue in the proceeding the quality of his or her consent or assent (Commercial Bank of Australia Limited v Amadio (1983) 151 CLR 447 per Deane J at 474). The quality of such consent or assent will ordinarily be affected by relevant legal advice received by the party. The principle that requires that in such circumstances the party not be entitled to maintain the confidentiality of such advice is one of fairness which goes to the integrity of the legal process. To allow a party to put in issue the quality of his or her consent or assent whilst, at the same time, withholding evidence relevant to that issue, would be to allow him or her unfairly to handicap the opposing party to the proceeding, and to compromise the ability of the court realistically to determine the issue. There is, in our view, little, if any, difference in principle between the undue influence cases, the partial disclosure cases such as Benecke v National Australia Bank, and the "other use" cases such as Attorney-General for The Northern Territory v Maurice and Goldberg v Ng. In the three classes of cases the law implies a consent to the use of the privileged material, or, what is in reality the same thing, a waiver of the privilege, if by reason of some conduct of the party otherwise entitled to the privilege, it would be unfair to the other party, in a way which goes to the integrity of the legal process, for the privilege to be maintained.
The legal professional privilege cases are, in our view, to be analysed in the same way. The quality of any particular legal advice, and the extent, if any, to which it was causative of loss and damage, can only properly be assessed once it is placed in the context of the totality of legal advice received by the client. The client, by bringing the proceeding, is taken to have consented to the use of the privileged material, or to have waived reliance on the privilege which would otherwise attach to such material. Reliance on the privileged nature of the material would, in the circumstances, be unjust and would inhibit the proper functioning of the legal process.
Where, as in this case, a party pleads that he or she undertook certain action "in reliance on" a particular representation made by another, he or she opens up as an element of his or her cause of action, the issue of his or her state of mind at the time that he or she undertook such action. The court will be required to determine what was the factor, or what were factors, which influenced the mind of the party so as to induce him or her to act in that way. That is, the party puts in issue in the proceeding a matter which can not fairly be assessed without examination of relevant legal advice, if any, received by that party. In such circumstances, the party, by putting in contest the issue of his or her reliance, is to be taken as having consented to the use of relevant privileged material, or to put it another way, to have waived reliance on the privilege which such material would otherwise attract.
The above analysis seems to us to be consistent with the approach of McLelland J in United States Surgical Corp. v Hospital Products International Pty Ltd (13 October 1981 - as reported in Ritchie's Supreme Court Prodedure NSW) at 8546-7:
"In the Thomason Case, the plaintiff was asserting a right to claim damages in a statutory context which rendered it implicit in such an assertion that the plaintiff had not effectively exercised her option to take the alternative course, notwithstanding that on the pleadings the onus of proving the effective exercise by the plaintiff of that option, and in an evidentiary sense the onus of proving the plaintiff's knowledge of her legal rights, in each case rested on the defendant. So that it may be that the criterion that the otherwise privileged party must have himself raised the fact and nature of the advice as an issue in the case is too rigidly stated. Nevertheless, before the privilege can be said to have been lost on this principle, one must at least be able to identify some element or feature of the claim made, or the evidence adduced, by the party otherwise entitled to the privilege, which would render reliance on the principle unjust."
In Attorney-General for the Northern Territory v Maurice Mason and Brennan JJ at 487 said:
"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".
Within that framework, the conduct of a party which leads to the implication of consent to the use of otherwise privileged material, or to an implied waiver of such privilege, in undue influence cases, legal professional negligence cases and, in my view, the "state of mind" cases, is that of raising for determination in legal proceedings, as an element in the cause of action relied upon, an issue incapable of fair resolution without reference to that material.
Before returning to the construction of s 122(1) of the Act, some comments should be made, obvious as some of them may be, about the scope and effect of the principle just stated. It does not constitute a broad inroad into legal professional privilege as a "substantive and fundamental common law principle" (Carter v Northmore Hale Davy & Leake (1995) 183 CLR 121 at 122 per Deane J). Nor does it involve any balancing of competing public interests, one in facilitating the application of the rule of law by promoting frank communication between clients and their legal advisers, the other in ensuring that all relevant evidence is placed before a court adjudicating as to the legal rights of parties before it: the recognition of the privilege is itself the outcome of such a balancing process: Waterford v The Commonwealth (1987) 163 CLR 54 at 64-65; Carter at 128. Nor it is a consequence of the principle that whenever a person's state of mind is relevant to an issue in proceedings, privilege is taken to be waived in relation to legal advice that may have played part in the formation of that state of mind (so that the principle does not, for example, deny the authority of Kennedy v Lyell (1883) 23 ChD 387; Lyell v Kennedy (No. 2) (1883) 9 AppCas 81). It is unnecessary and inappropriate, having said those things, to attempt to define exhaustively the scope of the principle. Where, however, a party relies on a cause of action, an element of which is the party's state of mind (including the quality of the party's assent to a transaction) 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, material to the formation of that state of mind.
In our view, s 122(1) of the Act is to be construed as reaching to cases in which the client or party concerned is deemed to have consented to the disclosure of the otherwise privileged material in the sense discussed above. To constrain the operation of the subsection to instances of voluntary assent to the adducing of evidence which would otherwise attract client legal privilege is, in our view, to give insufficient weight to the context in which the subsection is found, and to the common law background against which the Act as a whole is to be understood. The primary judge expressed the view that, while "consent" in s 122(1) might include implied as well as express consent, it would be straining language excessively to hold that it extended to a "consent" imputed to a party on the basis of fairness. Presumably an implied consent, as envisaged by his Honour, is one that is found to be, on the evidence, real and voluntary though not express. In fact, however, the cases, not surprisingly, use the terms "implied" and "imputed" interchangeably (see, for example, Maurice at 488 per Mason and Brennan JJ, Goldberg at 95-96 per Deane, Dawson and Gaudron JJ and at 109 per Toohey J). Once it is accepted that consent for the purposes of the section extends beyond express consent, we think it should be taken to extend to imputed consent. In particular, if that were not so, a defendant ordinarily would no longer be able, where the plaintiff alleges that a transaction was procured by the defendant's undue influence, to lead evidence to the effect that the plaintiff had comprehensive legal advice, immediately before entering into the transaction as to its effect. We cannot believe that that was intended. It follows that, in such cases, the position has changed little, if at all, following the introduction of the Act. Of course, as the Adelaide Steamship case demonstrates, the position may be different where the conduct relied upon is some disclosure of legal advice, but that need not be further considered here.
Have BT in this case put in contest, by reason of the elements of their pleaded cause of action, an issue incapable of fair resolution without reference to relevant legal advice, if any, received by them? In our view, they have. They have propounded a claim based on ss 52 and 82 of the Trade Practices Act 1974 (Cth) ("the TPA"). They have pleaded relianceupon allegedly misleading and deceptive representations made on behalf of the State to establish the necessary causal connection between the conduct of the State and the damage allegedly suffered by them.
As the judge at first instance observed, in the course of a longer passage set out in full above:
"There is … little doubt that the content of any legal advice relating, for example, to the effect of the acknowledgments in the TDN Agreement or the relationship between representations and the terms of the TDN Agreement, could be material to any assessment of the reliability of evidence by BT's officers as to their state of mind."
In our view, BT are to be taken, within the meaning of s 122(1) of the Act, to have consented to the disclosure of any legal advice received by them -
(a) as to whether contractual provisions could exclude them from the benefit of representations made during the negotiations leading to the TDN Agreement; and
(b) specifically concerning the legal effect of the acknowledgment provision of the TDN Agreement.
Thus, in accordance with the reasoning of the Full Court in the Adelaide Steamship case, at common law, as derivatively altered by the Act, BT has lost its privilege in such legal advice.
We would set aside the orders dated 1 April 1998 of the judge at first instance on the further amended notice of motion of the State originally filed on 24 October 1997 and in lieu thereof order that:
BT Australasia Pty Limited and British Telecommunications plc each produce for inspection by the State of New South Wales any written legal advice received by them or either of them:
(a) as to whether contractual provisions could exclude them from the benefit of representations made during the negotiations leading to the Telephone and Data Network Agreement between BT Australasia Pty Ltd and the State of New South Wales.
(b) specifically concerning the legal effect of clauses 3.3 and 20.4 of the Telephone and Data Network Agreement between BT Australasia Pty Ltd and the State of New South Wales.
We would hear counsel on the question of costs before the judge at first instance and before this Court.
I certify that this and the preceding twelve (12) pages are a true copy of the Reasons for Judgment herein of the Honourable Justices Branson and Lehane.