York Air Conditioning and Refrigeration (A/sia) Pty Ltd v The Commonwealth

The High Court of Australia heard an appeal from a decision of Williams J. in an action brought by the Commonwealth of Australia against York Air Conditioning and Refrigeration (A/sia) Pty. Ltd. The dispute concerned the recovery of alleged overpayments made by the Commonwealth to the company under eight "maximum price" contracts for the supply of portable cold storage rooms during the war. The Commonwealth sought to recover these overpayments based on a clause in the contracts that allowed for a price reduction if the profit margin on ascertained costs exceeded ten per cent.

The central legal issues before the court were whether clause 1(a) of the General Conditions, which provided for a potential price reduction, was sufficiently certain and whether the Commonwealth had validly exercised its option to reduce the prices. Additionally, the court had to determine if the "Standard Conditions" referred to in the contracts were vague or uncertain, and whether the money sought by the Commonwealth was recoverable as money paid under a mistake of fact or as money had and received. The company also argued that the price reduction option had not been exercised within a reasonable time.

A majority of the High Court, comprising Latham C.J., Rich, Dixon, and McTiernan JJ., dismissed the appeal. Latham C.J. and McTiernan JJ. found that the money was repayable under the express terms of the contracts. Rich and Dixon JJ. held that the payments were made provisionally and were therefore recoverable in an action for money had and received, as they were not paid under a mistake of fact. The majority also concluded that clause 1(a) was not uncertain and conferred a valid option on the Commonwealth to reduce the price where the profit margin exceeded ten per cent, an option that had been properly exercised within a reasonable time. They further found the "Standard Conditions" to be sufficiently certain in the circumstances. Webb J. dissented, advocating for a new trial due to overlooked evidence.