Marks & Ors v GIO Aus Holdings Ltd

The High Court of Australia considered an appeal by Marks and others against GIO Australia Holdings Ltd. The dispute concerned the interpretation of a deed of settlement and release entered into between the parties, which aimed to resolve a prior class action. The central question was whether the deed effectively released GIO from all claims, including those arising from alleged misleading and deceptive conduct in relation to certain share transactions, or if the release was limited to the specific claims brought in the original class action.

The High Court was required to determine the scope of the release contained within the deed of settlement. Specifically, the court had to ascertain whether the language used in the deed was sufficiently broad to encompass claims that were not expressly pleaded or contemplated in the original class action proceedings, particularly those relating to alleged contraventions of the *Trade Practices Act 1974* (Cth). This involved an analysis of the principles of contractual interpretation as applied to deeds of settlement and release.

The Court's reasoning focused on the ordinary meaning of the words used in the deed, applying established principles of contractual construction. It was held that the language of the release, particularly the phrase "all claims, demands and liabilities whatsoever," was intended to be comprehensive and to cover all causes of action that the plaintiffs had against GIO, whether known or unknown at the time of settlement, provided they arose from the subject matter of the original dispute. The Court emphasised that a broad and general release, clearly expressed, should be given its full effect, even if it extends to claims that were not specifically litigated. The Court found that the deed was intended to provide a final and conclusive settlement of all disputes between the parties.

The High Court allowed the appeal, finding that the deed of settlement did not operate to release GIO from the claims brought by Marks and the other appellants. The Court held that the language of the release, while broad, was not sufficiently clear to encompass claims that were not within the scope of the original class action. The appeal was therefore allowed with costs.