Commissioner of Taxation v Clyne

The Commissioner of Taxation brought proceedings against Peter Leopold Clyne to recover £752 in provisional tax and contribution. The taxpayer demurred to the statement of claim, arguing that the legislation under which the provisional tax was imposed was beyond the constitutional powers of the Commonwealth Parliament. The matter was heard by the Full Court of the High Court of Australia.

The legal issues before the Court were whether the imposition of provisional tax and contribution was within the Commonwealth Parliament's power to make laws with respect to taxation under section 51(ii) of the Constitution. Further, the Court had to determine if the legislation contravened section 55 of the Constitution, which restricts laws imposing taxation to matters of taxation only, and if it offended section 51(xxxi) by acquiring property on unjust terms. Additionally, the Court considered whether section 79A of the Assessment Act, which provided zone allowances, discriminated between States or parts of States contrary to section 51(ii) or gave an impermissible preference contrary to section 99 of the Constitution.

The Court held that the system of provisional tax and contribution was within the power conferred by section 51(ii) of the Constitution. It was not a separate tax but a liability ancillary to the primary income tax and social services contribution, designed to bring the discharge of the tax burden into closer temporal relation with the accrual of income. The Court reasoned that this policy was reasonably incidental to the power to legislate with respect to taxation. Furthermore, the Court found that section 12 of the Income Tax and Social Services Contribution (Individuals) Act 1956, which imposed provisional tax, dealt with a liability incidental to the principal tax and therefore fell within the scope of a law dealing "only with the imposition of taxation" as required by section 55. The argument that the collection of provisional tax constituted an acquisition of property on unjust terms under section 51(xxxi) was rejected.

Regarding the zone allowances under section 79A, the Court found that this section, as introduced by Act No. 4 of 1945, was invalid ab initio as it discriminated between States or parts of States contrary to sections 51(ii) and 99 of the Constitution. However, the Court also held that this invalidity did not affect the validity of the Income Tax and Social Services Contribution (Individuals) Act 1956, as only validly enacted provisions of the Assessment Act were incorporated into it. Therefore, the demurrer was overruled.