Pilbara Iron Ore Pty Ltd v Ammon

Pilbara Iron Ore Pty Ltd was the appellant and Ammon was the first respondent in this case heard by the Supreme Court of Western Australia. The dispute involved a joint venture agreement related to mining operations, specifically whether the appellant had completed a feasibility study in accordance with the agreement. The primary issue was whether the primary court and the Mining Warden had properly construed the express terms of the joint venture agreement before finding any implied terms. The appellant argued that the feasibility study was completed as per the agreement, while the respondent contended otherwise.

The court examined whether the primary court and the Mining Warden had correctly interpreted the express terms of the joint venture agreement before concluding on the existence of implied terms. The court noted that the general principle in contract construction is to provide a businesslike interpretation, ensuring that the contract's commercial object is met. The court highlighted that business commonsense may vary among parties, and the more detailed the contract, the less likely it is that the parties overlooked an issue. The court found that the primary court and the Mining Warden had not properly construed the express terms of the agreement, which led them to improperly find implied terms.

The court concluded that the matter should be remitted to the Mining Warden's Court to consider any application by the first respondent for leave to plead the proper construction of the joint venture agreement. The court emphasised that the question of whether the appellant had completed a feasibility study in accordance with the agreement had not been properly litigated or determined in the previous proceedings. This decision underscores the importance of correctly interpreting the express terms of a contract before implying any terms.