Practical consequence of granting or refusing leave to discontinue
46If leave to discontinue is granted, Bluescope's claim in these proceedings will come to an end. It must follow, in my opinion, that I would refuse leave to Allianz to file a cross-claim. There would be no utility in doing so.
47In that event, Allianz has foreshadowed that it would commence, immediately, fresh proceedings in this Court seeking relief to the same effect as that in the proposed cross-claim.
48Bluescope has foreshadowed that, if that occurred, it would seek a stay of those proceedings on the grounds of abuse of process and it would rely upon principles of the kind set out in Batistatos v Roads and Traffic Authority (NSW) [2006] HCA 27; (2006) 226 CLR 256 per Gleeson CJ, Gummow, Hayne and Crennan JJ at [9].
49On the other hand, if leave to discontinue is not granted Allianz would seek to have these proceedings prosecuted. The proceedings in the Dust Diseases Tribunal will remain pending, set to be heard on 10 December 2012.
50Allianz has stated that, in that event it will approach Kearns J and ask his Honour to refrain from proceeding on 10 December 2012.
51It seems likely that his Honour would wish to proceed with the matter, unless restrained from doing so.
52I say this because on 31 August 2012, when setting the 10 December 2012 date, Kearns J said that the date was "far enough away for you to get relief to prevent my hearing".
53If leave to discontinue were not granted, and this proceeding continued, and Kearns J refused to defer consideration of the matter, Allianz has foreshadowed making an application under s 69 of the Supreme Court Act for relief in the nature of a writ of prohibition to restrain Kearns J from hearing the case pending the decision in this case.
54However, it is hard to see how a remedy by writ of prohibition could lie unless it could be established that the Dust Diseases Tribunal does not have jurisdiction to hear the matter.
55In Aronson, Dyer and Groves, Judicial Review of Administrative Action, 4th ed (2009), it was said at page 804: -
"...unlike certiorari, prohibition lies only for actual threatened excess of power. Almost no-one has suggested that prohibition also lies for patent non-jurisdictional error of law, and there is substantial authority against the idea".
56The authors cite, amongst other authorities, Sydney Water Corp Ltd v Industrial Relations Commission of NSW [2004] NSWCA 436; (2004) 61 NSWLR 661 at 675 [62]: -
"Nevertheless, the Court should not make an order in the nature of prohibition unless satisfied of a threatened jurisdictional error". (citation omitted, emphasis in original)
57As set out above, the Court of Appeal in Allianz Australia Insurance Ltd v Bluescope Steel Ltd proceeded on the basis that the Dust Diseases Tribunal does have jurisdiction.
58Allianz has foreshadowed that it may also seek to test a refusal by Kearns J to cease hearing the matter by application for leave to appeal to the Court of Appeal under s 32 of the Dust Diseases Tribunal Act "on a point of law". However, if, as seems clear, the Dust Diseases Tribunal does have jurisdiction, it is hard to see what error of law will arise.
59There thus looms the most unattractive prospect that if leave to discontinue these proceedings is not granted, two sets of proceedings, in this Court and in the Dust Diseases Tribunal, will proceed in parallel and that both the Dust Diseases Tribunal and this Court will be asked to decide the same issue between the same parties. To merely state that proposition is to reveal its unacceptability.
60I am not able to say how likely that prospect is. That depends on whether Allianz could get relief in the nature of prohibition, or leave to appeal, as it foreshadows. I am satisfied there is, at the very least, real doubt it could get such relief and thus a sensible prospect of a "two decisions" scenario.
61Whatever decision I make, more litigation is likely. In those circumstances it is hard to make any decision about this matter that will promote the "just, quick and cheap resolution of the real issues in the dispute": s 56 of the Civil Procedure Act.
62Thus, there are a number of competing matters I must take into account.
63I think there is weight in Allianz's submission that to allow leave to discontinue would deprive Allianz of an advantage, perhaps a significant advantage, it has as a result of Bluescope's decision to commence these proceedings. However, as I have said, that advantage has only arisen because of Allianz's decision not to proffer the undertaking sought.
64In any event, my opinion is that the force of Allianz's submission is outweighed by the prospect that refusal to grant leave to discontinue may result in both the Dust Diseases Tribunal and this Court deciding the same issue between the same parties. That prospect must be avoided at all costs.
65Accordingly, I propose to grant Bluescope leave to discontinue.