Commonwealth v Amann Aviation Pty Ltd

The High Court of Australia considered the appeal in *Commonwealth v Amann Aviation Pty Ltd*. The dispute arose from the termination of a contract between the Commonwealth and Amann Aviation for the provision of aerial surveillance services. Amann Aviation alleged that the Commonwealth had breached the contract by wrongfully terminating it, and sought damages for loss of profit. The Commonwealth contended that it was entitled to terminate the contract due to Amann Aviation's failure to meet certain contractual obligations.

The central legal issues before the High Court were whether the Commonwealth's termination of the contract was lawful, and if not, what damages were recoverable by Amann Aviation. Specifically, the Court had to determine the proper interpretation of the termination clauses within the contract and the consequences of a wrongful repudiation by the Commonwealth. A key question was whether Amann Aviation was entitled to recover damages for loss of profit on the unperformed portion of the contract, even though it had not yet incurred significant expenditure in reliance on the contract.

The High Court, by majority, held that the Commonwealth's termination of the contract was wrongful. The Court reasoned that the Commonwealth's actions constituted a repudiation of the contract, and that Amann Aviation was entitled to accept this repudiation and claim damages for breach. Crucially, the Court affirmed the principle that a party who has not yet incurred expenditure in reliance on a contract may still recover damages for loss of profit if the contract is wrongfully terminated. This principle is based on the expectation measure of damages, which aims to put the innocent party in the position they would have been in had the contract been performed. The Court rejected the argument that Amann Aviation's claim was limited to reliance damages, finding that the loss of profit was a direct and foreseeable consequence of the breach.

The High Court allowed the appeal in part, setting aside the judgment of the Full Federal Court and remitting the matter to the Federal Court for assessment of damages in accordance with the principles laid down by the High Court.