R v Coldham; Ex parte

The High Court of Australia considered an application for prohibition by Mr. Coldham against the Commonwealth Director-General of Social Services. The dispute concerned the Director-General's decision to refuse Mr. Coldham's claim for a pension, a decision which Mr. Coldham sought to have quashed.

The central legal issue before the Court was whether the Director-General had acted *ultra vires* his statutory powers in making the determination to refuse the pension. Specifically, the Court had to determine if the Director-General had failed to observe the requirements of natural justice in reaching his decision, particularly in relation to the applicant's right to be heard.

The Court reasoned that the Director-General, in exercising his statutory power to determine pension claims, was bound by the rules of natural justice. These rules required that a person affected by a decision be given adequate notice of the case against them and a reasonable opportunity to present their own case. The Court found that the Director-General had not afforded Mr. Coldham these procedural rights, thereby exceeding his lawful authority. The Court applied the principle that a failure to observe natural justice renders a decision invalid.

The High Court made absolute the order nisi for prohibition, quashing the Director-General's decision to refuse the pension.