Registrar of the Accident Compensation Tribunal v The Commissioner of Taxation of the Commonwealth of Australia

The High Court of Australia was asked to consider an application under section 40 of the Judiciary Act 1903 for the removal of a cause from the Federal Court of Australia. The parties involved were the Registrar of the Accident Compensation Tribunal, acting on behalf of the Attorney-General for the State of Victoria, and the Commissioner of Taxation of the Commonwealth of Australia. The underlying dispute concerned the taxability of income set aside by the Tribunal for payment to claimants.

The central legal issues before the High Court were whether the imposition of Commonwealth taxation on the income of the Accident Compensation Tribunal impaired the functioning of the judicial arm of the State of Victoria, and the extent to which this issue was affected by previous High Court decisions, particularly *SASFIT*. The Tribunal argued that as a judicial instrumentality of the State, its capacity to function was inhibited by the Commonwealth's taxing power.

The Court was presented with arguments that while some aspects of the case involved the construction of the Tax Act, the more significant constitutional questions related to the implied prohibition on the Commonwealth taxing the instrumentalities of a State. The Registrar contended that the taxation of funds held by the Tribunal, which was described as having judicial functions, impaired the State's judicial arm, and that this specific issue had not been directly addressed by the High Court in prior section 114 cases. The Court noted that the *SASFIT* decision had significantly diminished the scope of one of the constitutional questions.