State of South Australia v Honourable Peter Slipper MP

The case of State of South Australia v Honourable Peter Slipper MP involved the State of South Australia challenging the decision of the Honourable Peter Slipper MP, who, as the Minister for Defence, issued a certificate under section 24 of the Acts Interpretation Act 1901 (Cth) authorising the acquisition of land by the Commonwealth for the purpose of establishing a nuclear waste storage facility. The dispute arose as the South Australian government objected to the acquisition on the grounds that it violated state legislation prohibiting the operation of such a facility without a specific licence under federal safety laws. The High Court of Australia was tasked with determining whether the Minister's decision was legally justified.

The central legal issues the Court addressed were whether the Minister's decision to issue the certificate was supported by evidence and whether it contravened state legislation or was otherwise unlawful. The State argued that the Minister's decision lacked evidentiary support and was contrary to state laws prohibiting the operation of a nuclear waste facility without a licence. The Commonwealth contended that the Minister's decision was within his powers and did not contravene any law, as the acquisition was for a legitimate purpose and the Commonwealth intended to seek the necessary licence in due course.

The Court dismissed the State's arguments, holding that the Minister's decision was valid and not contrary to any law. The Court found that the Minister was entitled to be satisfied that the acquisition would facilitate the Commonwealth's intention to apply for a licence under federal safety laws, which would render the state prohibition inapplicable. The Court emphasised that the statutes in question did not apply to the acquisition of land but rather to the operation of a nuclear facility, which had not yet occurred. Therefore, the acquisition itself was lawful, and the Minister's decision was justified.

The Court dismissed the application and ordered that the applicant, the State of South Australia, pay the respondents' costs, to be taxed if the parties could not agree on the amount.