Bennett & Ors v Commonwealth of Australia

The applicants, Bennett and others, brought proceedings against the Commonwealth of Australia in the High Court of Australia. The dispute concerned the validity of certain actions taken by the Commonwealth in relation to the applicants' property interests.

The central legal issue before the Court was whether the Commonwealth's actions constituted an acquisition of property otherwise than on just terms, contrary to section 51(xxxi) of the Australian Constitution. This required the Court to consider the nature of the applicants' proprietary rights and the effect of the Commonwealth's conduct upon those rights.

Kirby J, in his reasons, analysed the concept of "acquisition of property" within the meaning of section 51(xxxi). His Honour emphasised that the provision is a protective constitutional guarantee for individuals whose property is compulsorily acquired by the Commonwealth. The critical question was whether the Commonwealth's actions had deprived the applicants of their property in a manner that amounted to an acquisition, thereby attracting the "just terms" requirement. His Honour considered the existing jurisprudence on the scope of section 51(xxxi) and its application to various forms of government interference with property rights.