Jacups; Ex parte - Re Kay & Ors

The applicant, Jacups, sought an order in the nature of prohibition against Kay and others, who were acting as commissioners of inquiry. The dispute concerned the validity of the commissioners' powers to compel the attendance of witnesses and to require them to answer questions during their investigation.

The central legal issue before Gleeson CJ was whether the commissioners possessed the statutory authority to compel the attendance of witnesses and to compel them to answer questions, particularly in circumstances where the witnesses might be incriminating themselves. This involved an interpretation of the relevant legislation governing the powers of the commissioners.

Gleeson CJ reasoned that the commissioners' powers were derived solely from the statute appointing them. He found that the legislation did not confer the broad powers of compulsion that the commissioners appeared to be asserting. Specifically, the Chief Justice determined that the commissioners lacked the power to compel a witness to attend or to answer questions, and that any attempt to do so would be an unlawful exercise of power. The principles of statutory interpretation were applied to limit the commissioners' authority to only those powers expressly granted by the enabling legislation.

The application for prohibition was therefore granted.