State of South Australia v Tanner

The High Court of Australia heard an application for special leave to appeal by the State of South Australia against a decision of the Full Court. The dispute concerned the validity of regulations made under the Waterworks Act, which were found by the Full Court to be inconsistent with and repealed by the Planning Act, and also to be beyond the regulation-making power conferred by the Waterworks Act. The State sought special leave on two grounds: first, that the Full Court erred in holding that control of land use in South Australia is exclusively the province of the Planning Act; and second, that the Full Court erred in its construction of a regulation-making power expressed in terms of achieving a particular result.

The legal issues before the High Court were whether the Planning Act exclusively occupied the field of land use control, thereby rendering regulations under the Waterworks Act invalid due to inconsistency. Additionally, the Court was asked to consider the proper approach to interpreting statutory powers to make regulations, particularly when the power is framed by reference to a desired outcome rather than specific actions. The applicant argued that other legislation, besides the Planning Act, can and does validly regulate land use, often requiring consideration of similar matters to those under planning legislation, even if with a more limited scope and a different statutory object.

The Solicitor-General for South Australia contended that the Full Court's determination that land use control is exclusively the domain of the Planning Act was too broad. He submitted that numerous statutes, enacted prior to or concurrently with the Planning Act, contain provisions that effectively regulate land use, either directly or indirectly, by tying licensing or operational requirements to the location and use of premises. The Solicitor-General argued that the Planning Act does not necessarily repeal or invalidate such pre-existing regulatory schemes, even where they touch upon land use considerations that might also be relevant under the Planning Act. The case also raised questions about the scope of regulatory powers, particularly when they are defined by the results they are intended to achieve, and how such powers should be construed in light of other legislative provisions.