27 Secondly, the Court would not deliver what would, in effect, be an advisory opinion on an issue which had become moot. Courts do not entertain appeals on questions which would "produce no foreseeable consequences for the parties": Gardner v Dairy Industry Authority of NSW (1977) 52 ALJR 180 at 188 per Mason J (with whom Jacobs J and Murphy J agreed); app Ainsworth v Criminal Justice Commission [1992] HCA 10; (1992) 175 CLR 564 at 582 (per Mason CJ, Dawson, Toohey and Gaudron JJ) and which are, therefore, academic: Sun Life Assurance Co of Canada v Jervis [1944] AC 111 at 113-114; FAI Traders Insurance Co Ltd v FAI Workers Compensation (NSW) Ltd and Ors (NSW Court of Appeal, unreported, 16 July 1996 per Handley JA with whom Beazley JA agreed, BC9603498); R v Home Secretary; Ex parte Salem [1999] 1 AC 450 at 457; Secretary to the Department of Human Services v Magistrates' Court at Melbourne [2002] VSCA 171; (2002) 6 VR 140 at 147 [19].
28 As Heydon JA (with whom Sheller JA and Einstein J agreed) said in Victims Compensation Fund Corporation v District Court of New South Wales and Anor [2002] NSWCA 355 at [27], it is wrong for judicial power to be exercised in answering questions which are "merely moot, theoretical, abstract, hypothetical and advisory". His Honour continued:
"A judicial determination "involves a conclusive or final decision based on a concrete and established or agreed situation which aims to quell a controversy": Bass v Permanent Trustee Co Ltd (1999) 198 CLR 334 at [45] per Gleeson CJ, Gaudron, McHugh, Gummow, Hayne and Callinan JJ. Here there was a controversy, but it was not one which could be quelled by any particular outcome of the debate about s 30(3): the controversy had already been quelled by the findings negating shock and by the second opponent's abandonment of any challenge to them. And at [47] in Bass's case the court said: "Because the object of the judicial process is a final determination of the rights of the parties to an action, courts have traditionally refused to provide answers to hypothetical questions or to give advisory opinions." The question of what s 30(3) meant was only hypothetical, because it rested on the hypothesis that there was shock, and the second opponent had not proved this. The opinion offered on the hypothetical question was only advisory, because there was no "immediate right, duty or liability to be established by the determination of the Court" in the sense in which those words were used in In Re Judiciary and Navigation Acts (1921) 29 CLR 257 at 265 per Knox CJ, Gavin Duffy, Powers, Rich and Starke JJ.
29 To adapt his Honour's statement: there was a controversy in this case as to whether the appellant qualified for "hurt on duty" compensation. That controversy could not be quelled by the interpretation of s 170. It had already been quelled by GREAT's conclusion that it was satisfied that any injury the appellant had suffered was wholly or predominantly caused by reasonable action taken on behalf of the employer with respect to discipline of the appellant and by the fact the appellant did not challenge that finding.
30 The short point is that the appeal is academic and should be dismissed with costs.
31 As to the costs order, I am concerned that the appellants' legal representatives ought to have been aware that, absent a challenge to GREAT's conclusion on the s 11A point, the appeal was futile. The point was flagged in the respondent's submissions. The appellant's legal representatives ought, in any event, to have been aware of the principles to which I have referred.
32 In such circumstances I request an undertaking from those lawyers that they will not look to the appellant for his costs of the appeal and that they will indemnify him in respect of the order that he pay the respondent's costs of the appeal. If such an undertaking is to be proffered it should be given in writing within two days of this judgment by being forwarded to the Registrar of the Court of Appeal.
33 Absent that undertaking, in my view, the Court should consider issuing a show cause notice under Part 52A r 43 to the appellant's legal representatives.
34 HAMILTON J: I agree with McColl JA.