CONSIDERATION
39 Some general observations are in order before we turn to the resolution of the issues between the parties.
40 Section 42(1) of the FOI Act provided that a document was exempt from production under the FOI Act if it would be privileged from production in legal proceedings on the ground of legal professional privilege. This privilege arises under the common law. To the extent that it may be assumed that waiver is relevant for the purposes of s 42(1), waiver is also a creature of the common law.
41 Waiver may be either express or implied. Here, there was no publication of the entirety of the AGD legal advice; accordingly, the species of waiver relied upon by the appellant is implied waiver. The objective test of implied waiver is that stated by the High Court in Mann v Carnell (1999) 201 CLR 1 at [28]-[29] (Mann) per Gleeson CJ, Gaudron, Gummow and Callinan JJ. Legal professional privilege will be waived, whatever the intention of the person whose conduct is in question, if the conduct of the person seeking to rely upon the privilege is inconsistent with the maintenance of the privilege. Their Honours said at [28]-[29]:
…Legal professional privilege exists to protect the confidentiality of communications between lawyer and client. It is the client who is entitled to the benefit of such confidentiality, and who may relinquish that entitlement. It is inconsistency between the conduct of the client and maintenance of the confidentiality which effects a waiver of the privilege. Examples include disclosure by a client of the client's version of a communication with a lawyer, which entitles the lawyer to give his or her account of the communication, or the institution of proceedings for professional negligence against a lawyer, in which the lawyer's evidence as to advice given to the client will be received.
Waiver may be express or implied. Disputes as to implied waiver usually arise from the need to decide whether particular conduct is inconsistent with the maintenance of the confidentiality which the privilege is intended to protect. When an affirmative answer is given to such a question, it is sometimes said that waiver is "imputed by operation of law". This means that the law recognizes the inconsistency and determines its consequences, even though such consequences may not reflect the subjective intention of the party who has lost the privilege… 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.
42 This statement of the test is somewhat different from the approach previously stated in Attorney General for the Northern Territory v Maurice (1986) 161 CLR 475 and later in Goldberg v Ng (1995) 185 CLR 83 (Goldberg v Ng). Those decisions focused on the fairness of allowing the privilege to stand. In Goldberg v Ng Deane, Dawson and Gaudron JJ held that in considering whether there is an imputed waiver of legal professional privilege, "the governing consideration is whether fairness requires that the privilege shall cease", irrespective of the intention of the holder of that privilege. The focus is now upon inconsistency of conduct, but in determining whether there has been an inconsistency of conduct, considerations of fairness are still relevant: Mann at [34].
43 In Osland v Secretary, Department of Justice (2008) 234 CLR 275 (Osland v Secretary, Department of Justice), Ms Osland had been convicted and sentenced to imprisonment for murder. She petitioned the Governor of Victoria for mercy. The Attorney-General for Victoria subsequently issued a press release stating that he had obtained legal advice from three Senior Counsel which recommended that the petition be denied and that the Governor had denied the petition. Ms Osland sought access to the legal advice under the Victorian analogue of the FOI Act. The High Court unanimously held that privilege in the legal advice had not been waived. It was held that the disclosure of the effect of the advice was made for the purpose of satisfying the public that due process had been followed and that the petition had not been refused on political grounds. It is difficult to see how the question of inconsistency which arises in this case could be resolved in favour of the appellant consistently with the decision of the High Court and the statement of principle by Maxwell P in the Court of Appeal of Victoria in Secretary, Department of Justice v Osland (2007) 95 ALD 380 (Secretary, Department of Justice v Osland) which Gleeson CJ, Gummow, Heydon and Kiefel JJ expressly endorsed at [55].
44 It is now clear that disclosure of the gist of a privileged communication does not necessarily effect a waiver of legal professional privilege. In Secretary, Department of Justice v Osland at [29]-[51], Maxwell P of the Court of Appeal of Victoria reviewed the authorities. At the conclusion of that review Maxwell P said at [49]-[51]:
[49] Disclosure of the conclusion (or the gist, substance or effect) of legal advice may, or may not, amount to a waiver of privilege in respect of the advice as a whole. Whether it does in a particular case will depend on whether, in the circumstances of the case, the requisite inconsistency exists, between the disclosure on the one hand and the maintenance of confidentiality on the other. In Bennett, the majority of the Full Federal Court judged that there was inconsistency and hence waiver; in British American Tobacco Australia Services Ltd v Cowell (discussed below), this Court judged that there was not. In each case, there was a disclosure of the gist or substance of advice given. That opposite conclusions were arrived at is simply a reflection of the different circumstances of the respective cases.
[50] The content of an advice will often include confidential information about instructions given by the client, or about evidence to be given by a witness, or about forensic investigations being or proposed to be undertaken. These examples are sufficient to demonstrate why it is simply not the case that the disclosure of the conclusions necessarily amounts to, or necessarily entails, the disclosure of the content. There is no necessary inconsistency between disclosure of the one and non-disclosure of the other.
[51] As Carnell demonstrates, the inconsistency test readily accommodates the notion that, in appropriate circumstances, the privilege-holder may disclose the content of legal advice to a third party for a particular purpose without being held to have waived privilege in the advice. Likewise, in my opinion, the test of inconsistency is well capable of accommodating the notion that, in appropriate circumstances, the privilege-holder should be able to disclose publicly that it is acting on advice and what the substance of that advice is, without being at risk of having to disclose the confidential content of the advice.
(Footnotes omitted)
45 On appeal to the High Court in Osland v Secretary, Department of Justice, the reasoning of Maxwell P was referred to with express approval in the joint judgment of Gleeson CJ, Gummow, Heydon and Keifel JJ. Their Honours said:
[44] On the issue of waiver of privilege in document 9, an issue resolved adversely to the appellant by both the Tribunal and the Court of Appeal, both parties accepted that the principles to be applied were those stated in the joint reasons of four members of this Court in Mann v Carnell. The difference between the parties concerned their application to the circumstances of the present case.
[45] Waiver of the kind presently in question is sometimes described as implied waiver, and sometimes as waiver "imputed by operation of law". It reflects a judgment that the conduct of the party entitled to the privilege is inconsistent with the maintenance of the confidentiality which the privilege is intended to protect. Such a judgment is to be made in the context and circumstances of the case, and in the light of any considerations of fairness arising from that context or those circumstances. In the case of Benecke, referred to in Mann v Carnell, and discussed by Maxwell P in the present case, an appreciation of the unfairness if Mrs Benecke could give her version of her communications with her lawyer and at the same time prevent the lawyer from giving her own version was one aspect of the inconsistency between her conduct in making certain kinds of allegation against her lawyer and holding her lawyer to obligations of confidentiality. In the present case counsel for the appellant acknowledged that, if the press release had not included the sentence earlier identified as critical, privilege probably would not have been waived. This is undoubtedly correct, even though, upon that hypothesis, the press release would have made some disclosure concerning legal advice taken by the Department.
[46] The conduct of the Attorney-General in issuing the press release and including in it certain information about the joint legal advice is to be considered in context, which includes the nature of the matter in respect of which the advice was received, the evident purpose of the Attorney-General in making the disclosure that was made, and the legal and practical consequences of limited rather than complete disclosure.
…
[49] Whether, in a given context, a limited disclosure of the existence, and the effect, of legal advice is inconsistent with maintaining confidentiality in the terms of advice will depend upon the circumstances of the case. As Tamberlin J said in Nine Films and Television Pty Ltd v Ninox Television Ltd, questions of waiver are matters of fact and degree. It should be added that we are here concerned with the common law principle of waiver, not with the application of s 122 of the Evidence Act 1995 (Cth) which, as was said in Mann v Carnell, has the effect that privilege may be lost in circumstances which are not identical to the circumstances in which privilege may be lost at common law.
[50] The reasoning of Maxwell P was correct.
(Footnotes omitted).
46 In Osland v Secretary, Department of Justice, Gleeson CJ, Gummow, Heydon and Kiefel JJ referred with evident approval to another passage in the judgment of Maxwell P in the Court of Appeal which makes the point that there is no necessary inconsistency in stating the effect of advice and maintaining a claim of privilege. Their Honours said at [35]:
After a discussion of a number of cases argued by the parties to be analogous, Maxwell P expressed his conclusion that the Tribunal's decision on waiver was not only open but was clearly correct. He gave his reasons as follows:
Amongst the circumstances relevant to determining inconsistency, it is clear from Carnell and Bennett that the purpose for which the privilege-holder made the disclosure is highly relevant. The question here was whether the use made by the Minister of the disclosed portion of the privileged communication - more particularly, the purpose for which the conclusion was disclosed - was inconsistent with the maintenance of confidentiality in respect of the content of the advice.
First it is necessary to restate the purpose of the confidentiality which the privilege preserves. In Grant v Downs, Stephen, Mason and Murphy JJ said:
'The rationale of this head of privilege, according to traditional doctrine, is that it promotes the public interest because it assists and enhances the administration of justice by facilitating the representation of clients by legal advisers, the law being a complex and complicated discipline. This it does by keeping secret their communications, thereby inducing the client to retain the solicitor and seek his advice, and encouraging the client to make a full and frank disclosure of the relevant circumstances to the solicitor.'
Later, in Baker v Campbell, Mason J noted that the underlying policy of the privilege covering legal advice 'involved the promotion of freedom of consultation generally between lawyer and client.' In the same case, Deane J said that the principle underlying the privilege was that 'a person should be entitled to seek and obtain legal advice without the apprehension of being prejudiced by the subsequent disclosure of confidential communications.'
The evident purpose of the Attorney-General's disclosure was to inform the public that the recommendation he had made to the Governor - that the petition for mercy be denied - was based on independent legal advice, advice which recommended that each ground advanced in the petition should be rejected. The Attorney-General evidently wished it to be known that, in considering whether or not the prerogative of mercy should be exercised, he had taken independent advice and was making a recommendation which accorded with that advice. In the language of Carnell, this was a disclosure 'for the purpose of explaining or justifying' the Attorney-General's actions. The purpose was similar to that of the disclosure in Carnell itself, where the Chief Minister wished to satisfy the relevant member of Parliament that the ACT Government 'had acted responsibly and in accordance with legal advice'.
In my opinion, there was no inconsistency between disclosing the fact of, and the conclusions of, the independent advice for that purpose, and wishing to maintain the confidentiality of the advice itself. This was not a case of a party to litigation 'deploying' a partial disclosure for forensic advantage, while seeking unfairly to deny the other party an opportunity to see the full text of the privileged communication. Nor was it 'the laying open of the confidential communication to necessary scrutiny'.
47 In the present case it cannot be said that the respondent, or the executive government generally is seeking to deploy a partial disclosure of the AGD legal advice for forensic or any other advantage. That is, in our opinion, decisive of this appeal. But we should address the specific issues which were agitated in this Court.