Commonwealth v New South Wales

The High Court of Australia considered a dispute between the Commonwealth of Australia and the State of New South Wales concerning land. The core of the disagreement revolved around the ownership and control of land that had been vested in the Commonwealth upon the transfer of certain government departments.

The central legal issue before the Court was to determine the extent of the Commonwealth's proprietary interest in land acquired for public purposes, specifically in circumstances where that land was transferred to the Commonwealth as part of the machinery of government. The Court was required to interpret the relevant legislative provisions governing the acquisition and transfer of land by the Commonwealth.

The High Court reasoned that the Commonwealth's acquisition of land for public purposes conferred upon it a proprietary interest in that land. This interest was not diminished by the subsequent transfer of government departments that occupied or utilised the land. The Court applied principles of constitutional law and property law to conclude that the Commonwealth held a valid and enforceable proprietary right over the land in question.