Williams v Commonwealth of Australia and Ors

The High Court of Australia considered the case of *Williams v Commonwealth of Australia and Ors*. The dispute concerned the constitutional validity of certain provisions of the *Military Rehabilitation and Compensation Act 2004* (Cth) (MRCA) and the *Safety, Rehabilitation and Compensation Act 1988* (Cth) (SRCA), as they applied to members of the Australian Defence Force who had suffered incapacity or death as a result of their service. The applicant, Mr Williams, a former member of the Australian Defence Force, sought to challenge the legislative framework governing compensation for his service-related injuries.

The central legal issue before the High Court was whether the MRCA and SRCA, in their operation concerning the compensation entitlements of serving and former Australian Defence Force members, were inconsistent with Chapter III of the Australian Constitution. Specifically, the Court was required to determine if the legislative provisions, by purporting to confer certain judicial functions on non-judicial bodies, contravened the constitutional separation of judicial power. This involved an examination of whether the MRCA and SRCA impermissibly vested powers in administrative tribunals that were properly exercisable only by courts invested with federal jurisdiction.

The High Court, in a majority decision, found that certain provisions of the MRCA and SRCA were invalid. The Court reasoned that the legislative scheme, by empowering the Military Rehabilitation and Compensation Commission and the Safety, Rehabilitation and Compensation Commission to make determinations that were conclusive and binding, and which involved the ascertainment of facts and the application of law in a manner akin to judicial decision-making, impermissibly conferred judicial power. The Court applied the principle that the exercise of judicial power is confined to Chapter III courts, and that legislative attempts to vest such power in non-judicial bodies are unconstitutional. The Court distinguished between the exercise of administrative power and the exercise of judicial power, finding that the impugned provisions crossed the line into the latter.

The Court made declarations that certain sections of the MRCA and SRCA were invalid and of no force or effect. The practical effect of this decision was to require the Commonwealth to reconsider the compensation entitlements of a significant number of former and serving Australian Defence Force members.