In the present case there are a number of circumstances that have led me to the conclusion that we should reconsider the correctness of Kotsis v. Kotsis and Knight v. Knight. It should be unnecessary to say that I am not about to recite a list of grounds any one of which, standing alone, would provide a justification for overruling an earlier decision. All the circumstances have to be considered, but for obvious reasons it is convenient to refer to some of them separately. In the first place, the decisions do not rest upon a principle that has been carefully worked out in a succession of cases. Although their correctness was perhaps assumed in Reg. v. Humby; Ex parte Rooney [8] , that assumption had nothing to do with the result in that case. They stand alone and to overrule them will not unsettle the law in other respects. Indeed, the decisions are in my respectful opinion opposed to the principle, established in Le Mesurier v. Connor [9] , that when the Parliament invests a State court with federal jurisdiction it has no power to alter or affect the constitution of the court or the organization through which its jurisdiction and powers are exercised; see also Adams v. Chas. S. Watson Pty. Ltd. [10] ; Peacock v. Newtown Marrickville and General Co-operative Building Society No. 4 Ltd. [11] ; and Russell v. Russell [12] . Secondly, there is an important difference between the reasoning of Barwick C.J. and that of the other justices who constituted the majority in Kotsis v. Kotsis. Barwick C.J., who spoke of s. 77(iii) as though it referred to "Supreme Courts" rather than simply to "courts", expressed the opinion [13] , that it is not entirely for a State to determine of whom the Supreme Court may consist for the exercise of federal jurisdiction. He said [14] : "If State law were to change this composition" [i.e., the composition of the Supreme Court] "in a radical way what the State continued to call the Supreme Court would not satisfy, in my opinion, the references in the Constitution to the Supreme Courts of the States." If Barwick C.J. intended to suggest that the reference to court in s. 77(iii) of the Constitution is only to a court as it was constituted before the commencement of the Constitution I am unable, with all respect, to accept the correctness of his suggestion. It is well established that the provisions of s. 39(2) of the Judiciary Act are ambulatory and operate upon State courts whether constituted before or after the commencement of the Judiciary Act: see The Commonwealth v. District Court of the Metropolitan District [15] , and Collins v. Charles Marshall Pty. Ltd. [16] . In the latter of those cases the court in question was established in 1937 - long after the commencement of the Constitution - but it was nevertheless held to be invested with federal jurisdiction. In Kotsis v. Kotsis, Menzies J. [17] stated the position in a way with which I would respectfully agree when he said that the Parliament "can do no more than invest a State Court, as it is or as it may become, with federal jurisdiction." Thirdly, the decisions in Kotsis v. Kotsis and Knight v. Knight achieve no useful result, but on the contrary lead to considerable inconvenience. On the one hand, to exclude the officers of a State court, who regularly exercise its powers, from the investiture of federal jurisdiction does nothing to protect the freedom of the individual or the independence of the judiciary, since a court composed of laymen, with no security of tenure, might effectively be invested with jurisdiction under s. 77(iii). On the other hand, to require the State courts to depart from their established organization in dealing with matters of federal jurisdiction has many disadvantages. I have expanded upon this aspect of the matter in Kotsis v. Kotsis [18] . Finally, a very important circumstance that led Stephen J. and myself in Queensland v. The Commonwealth [19] to refuse to overrule an earlier decision with which we disagreed was that the decision had been acted upon, and that a consequence of overruling it would be to deny representation in the Senate to inhabitants of the Territories to whom it had been conceded by the earlier decision. In the present case, the decisions in Kotsis v. Kotsis and Knight v. Knight have, it is true, in one sense, been acted upon, in that some States have enacted legislation for the obvious purpose of enabling masters to be invested with federal jurisdiction. However, the States have acted upon the decisions only for the purpose of endeavouring to circumvent them. No one will be adversely affected if the decisions are overruled.