Reserved powers doctrine

The reserved powers doctrine was a principle used by the inaugural High Court of Australia in the interpretation of the Constitution of Australia, that emphasised the context of the Constitution, drawing on principles of federalism, what the Court saw as the compact between the newly formed Commonwealth and the former colonies, particularly the compromises that informed the text of the constitution. The doctrine involved a restrictive approach to the interpretation of the specific powers of the Federal Parliament to preserve the powers that were intended to be left to the States. The doctrine was challenged by the new appointments to the Court in 1906 and was ultimately abandoned by the High Court in 1920 in the Engineers' Case, replaced by an approach to interpretation that emphasised the text rather than the context of the Constitution.

The Constitution sets up the Commonwealth of Australia as a federal polity, with enumerated limited specific powers conferred on the Federal Parliament. The constitutional convention held in Adelaide in 1897, passed a resolution that, as the first condition for the creation of a federal government, "the powers, privileges and territories of the several existing colonies shall remain intact, except in respect of such surrenders as may be agreed upon to secure uniformity of law and administration in matters of common concern." The intention of the framers of the Australian Constitution has been said to be "to create a federal government, albeit of limited jurisdiction, which would be responsive to the popular will in specified matters of national concern and to superimpose it upon existing colonial or state governments which were seen as each adequately responsive to the popular will within their respective territorial constituencies."

One of the tasks facing the inaugural High Court was to establish its reputation and in so doing to win the confidence of the Australian people. Another was to resolve "constitutional loose ends" about the nature of the federal system and the legislative powers of the new Commonwealth that remained unresolved following the debates in the constitutional conventions.

For the first two decades, the High Court stayed reasonably true to the "co-ordinate" vision of the framers in which the Commonwealth and the States were both financially and politically independent within their own spheres of responsibility. The High Court rejected Commonwealth government attempts to extend its authority into what were perceived as areas of State jurisdiction. The court did so by adopting a doctrine of "reserved State powers" combined with "implied inter-governmental immunities", to protect both the Commonwealth and the states from legislative or executive action which "would fetter, control, or interfere with, the free exercise" of the legislative or executive power of the other.

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