Port of Portland Pty Ltd v State of Victoria

The High Court of Australia heard an appeal from the Court of Appeal of the Supreme Court of Victoria concerning a contract between Port of Portland Pty Ltd (the appellant) and the State of Victoria (the respondent). The dispute arose from a contract under which the appellant purchased assets and business from the Port of Portland Authority. A key provision of the contract, clause 11.4(b), obligated the State to refund or allow the appellant excess land tax if legislative amendments, intended to exclude port improvements from land value calculations, did not become law. The appellant contended that the State breached this contractual obligation.

The central legal issues before the High Court were whether clause 11.4(b) of the contract was void as an unlawful dispensation from land tax legislation contrary to the constitutional principle recognised in section 12 of the Bill of Rights 1688, whether the clause actually effected such a dispensation, and whether the legislature, by enacting section 4A(1) of the Port of Portland Authority Act 1958 (Vic), had authorised the State's obligation under clause 11.4(b). Additionally, the court considered whether the State's obligation under clause 11.4(b) had arisen, given the timing of legislative amendments relative to the statutory land valuation scheme.

The High Court reasoned that the statutory scheme for land tax valuation, which required valuation as at a specific past date (30 June 1993 in this case), meant that amendments enacted after that date could not affect the land's unimproved value as determined according to law at that time. Consequently, the appellant's argument that the inclusion of subsequent legislative amendments necessitated an adjustment to the land value was unsuccessful. The Court concluded that clause 11.4(a) of the contract had not been satisfied, but that clause 11.4(b) was not void or ineffective due to any constitutional conflict. The Court found that clause 11.4(b) was engaged and that the appellant was entitled to recover under it.

The High Court allowed the appeal with costs. It set aside the orders of the Court of Appeal and the judgment of the trial judge, remitting the proceeding to the Trial Division of the Supreme Court of Victoria for an assessment of damages and consequential orders, including as to costs.