Port MacDonnell Professional Fishermen's Association Inc. & Anor v The State of South Australia

The parties to this proceeding before the High Court of Australia were the Port MacDonnell Professional Fishermen's Association Inc. and another party (the appellants) and the State of South Australia (the respondent). The dispute concerned the extent of the offshore jurisdiction of the State of South Australia, particularly in relation to fishing activities. The appellants sought to limit the operation of South Australian legislation to a territorial sea, arguing that the State's legislative power did not extend beyond that limit.

The central legal issue before the Court was whether the legislative power of a State, in the absence of specific Commonwealth legislation or constitutional provisions to the contrary, could extend beyond its territorial boundaries into offshore waters. This involved considering the principles of statutory construction, particularly the doctrine of non-extravagance, and the potential implications of section 118 of the Australian Constitution, the full faith and credit clause, in resolving conflicts between state laws. The Court was asked to determine the appropriate nexus required for a state law to have extraterritorial effect.

The Court considered arguments that, in the absence of specific limitations, states could potentially enact laws with conflicting obligations based on factors like domicile or residence. However, the primary submission was that courts would ordinarily construe legislation to avoid an extravagant area of operation, thereby alleviating potential conflicts. If such construction did not resolve the issue, the Court was invited to consider the application of section 118 of the Constitution, which might necessitate the development of a doctrine similar to a nexus requirement to determine which law should prevail in circumstances of conflict. The Court also noted the relevance of United States jurisprudence on similar issues.