5. The plaintiff contended that the law to be applied was the law of South Australia, the defendant that it was the law of New South Wales. In the view I take of the facts it has become unnecessary for me to decide this question. But it was argued; and, as it seems desirable that I should state by what law I considered I was governed in exercising jurisdiction, I may say that I have taken it to be the law of South Australia. I shall state very briefly why I think that is the correct view, without entering into any detailed discussion of the authorities to which I was referred. In my view the liability of the Commonwealth for a tort has its source in s. 56 of the Judiciary Act 1903-1965 (Cth). This Court has jurisdiction to entertain such an action by virtue of s. 75 of the Constitution. But in my view the Constitution does not of its own force subject the Commonwealth to liability in tort at the suit of a subject. The Judiciary Act I consider does that. I say this having regard especially to what Dixon J. said in Werrin's Case (Werrin v. The Commonwealth [1938] HCA 3; (1938) 59 CLR 150, at p 167 ) although I am aware that the reasoning of the majority in The Commonwealth v. New South Wales (1923) 32 CLR 200 , and some later judgments in this Court can be invoked for a contrary view. If, as I think, it is s. 56 of the Judiciary Act which makes the Commonwealth liable in tort at the suit of a subject, then, in my view that section also provides the answer to the question of the law to be applied when a subject brings such a suit. That, as I said during the hearing, is because s. 56 seems to me to contain within itself an implication that the law to be applied is the law of the State where the tort was committed and the cause of action arose. That is because jurisdiction in such a cause is not exerciseable by all courts which, anywhere in Australia, have jurisdiction in actions arising out of "foreign" torts. The section states that a plaintiff who sues the Commonwealth in contract or tort may do so in this Court, or in the Supreme Court of the State or Territory in which the claim arose, or (since the amendment made in 1960) in any other court of competent jurisdiction in that State or Territory. These are the only courts in which an action can be brought by a subject against the Commonwealth. From this I conclude that the intention of the Parliament of the Commonwealth when it made the Commonwealth liable at the suit of a subject was that, in whichever court of those authorized to try it the action is brought, it is to be tried according to the lex loci delicit ; and when the action is brought in this Court that becomes the lex fori. I see no reason at all for supposing that the law to be applied in such a case should vary according to whether the action were brought in a South Australian court or in this Court and that in this Court it would depend upon whereabouts in the Commonwealth the Court should sit to try the case. I do not think that ss. 79 and 80 of the Judiciary Act compel me to any such conclusion. The policy which they reflect is, I assume, that when this Court exercises jurisdiction in a State in a matter which might have been litigated in a court of that State the law which it is to apply should be the same law as the State court would apply in like case. Sections 79 and 80 thus attract the State law (including the rules of private international law applicable as part of the State law), and make it govern the proceedings in this Court. But those sections apply only when the laws of the Commonwealth do not otherwise provide. And in my view s. 56 is a law of the Commonwealth which makes a different provision. The defendant sought to displace this conclusion by reference to s. 64; but I do not think it has the effect suggested. Section 80A has a bearing on the matter. But whatever effect it has on procedural aspects, I am not satisfied that it affects the substantive law applicable in an action brought pursuant to s. 56. I was referred among other case to Parker's Case (Parker v. The Commonwealth [1965] HCA 12; (1965) 112 CLR 295 ), and to what I said there. That case however had some peculiar and special features. The tort was not committed within any State. The events out of which the action arose occurred on the high seas. The cause of action was not one known to the common law, being for compensation for the consequences of death, a claim which could only be based upon some statutory provisions equivalent to Lord Campbell's Act. It was conceded by counsel in that case that this Court had jurisdiction to entertain the action and to decide it in accordance with the law of Victoria: and, for reasons which I gave, I accepted that view. But, whether or not I was right there, this case is very different. Here the cause of action arose in South Australia and under the common law. The common law has been modified for South Australia by the provisions of the Wrongs Act of South Australia allowing apportionment of damages in cases of contributory negligence. And this statutory modification of the common law would I think be applicable in the case if the facts called for its application. I say this because, notwithstanding what Jordan C.J. said in Washington v. The Commonwealth (1939) 39 SR (NSW) 133 , the references in the Judiciary Act to the laws of the States (e.g. in s. 64) are now regarded as having an ambulatory effect. They are not tied to State law as it was in 1903. (at p357)