Hornsby Shire Council v Commonwealth of Australia

The High Court of Australia considered a constitutional challenge brought by Hornsby Shire Council against the Commonwealth of Australia. The dispute concerned "notional GST" payments that local government bodies were required to make, notwithstanding a prohibition in section 114 of the Constitution against the Commonwealth imposing tax on State property. These notional GST payments arose from a scheme where the Commonwealth provided grants to States for local government purposes under the Local Government (Financial Assistance) Act 1995 (Cth). As a condition of these grants, States agreed that local governments would make these notional GST payments, and the Act provided for the withholding of grant amounts from States that failed to ensure these payments were made by local government bodies.

The central legal issue before the Full Court was whether the provisions of the Local Government (Financial Assistance) Act 1995 (Cth), the Federal Financial Relations Act 2009 (Cth), and the Intergovernmental Agreement Implementation (GST) Act 2000 (NSW), when taken in combination, imposed a tax on property belonging to the plaintiff local government body, contrary to section 114 of the Constitution. The plaintiff argued that the notional GST payment it made under protest constituted such a tax.

The Court reasoned that the scheme, while involving a compulsory exaction, did not amount to a tax imposed by the Commonwealth on State property. The Court found that the payments were a condition attached to the receipt of financial assistance grants from the Commonwealth to the States, and the States, in turn, imposed conditions on local government bodies. The Court viewed the "notional GST" as a mechanism for ensuring that the States and local governments contributed to the GST revenue pool, rather than a direct tax imposed by the Commonwealth on State property. The Court concluded that the provisions in question did not, in combination or otherwise, impose a tax on property belonging to the plaintiff contrary to section 114 of the Constitution.

Consequently, the Court ordered that none of the specified provisions imposed a tax on property belonging to the plaintiff contrary to section 114 of the Constitution. The Court also ordered that no relief be granted to the plaintiff in respect of its payment of notional GST, and that the plaintiff pay the costs of the special case.