Wambo Coal Pty Ltd & Anor v Sumiseki Materials Co Ltd

The High Court of Australia heard an appeal concerning a dispute between Wambo Coal Pty Ltd and its parent company (the appellants) and Sumiseki Materials Co Ltd (the respondent). The core of the dispute involved the interpretation of a contract for the sale of coal, specifically concerning the calculation of the price payable for coal delivered under that contract.

The primary legal issue before the High Court was whether the appellants were entitled to deduct certain costs from the contract price of coal, as provided for in clause 10.3 of the Sale and Purchase Agreement. This clause stipulated that the appellants could deduct "all costs and expenses incurred by the Seller in connection with the production and delivery of the coal." The respondent argued that these deductions were not permissible under the contract.

The High Court, in a joint judgment delivered by French CJ and Hayne J, held that the plain language of clause 10.3 permitted the deductions claimed by the appellants. Their Honours reasoned that the phrase "all costs and expenses incurred by the Seller in connection with the production and delivery of the coal" was broad and encompassed the expenses the appellants sought to deduct. The Court rejected the respondent's submission that the clause should be interpreted more narrowly, finding no basis in the contract to limit the scope of the deductions. The appeal was therefore allowed.