Case Facts
The appellant, Howard William Cheney, was assessed to income tax under Schedule D for the year 1964–65 under s 12 Finance Act 1964 and to surtax for the year 1963–64 under s 13 Finance Act 1964. The commissioners determined the assessments at: income tax for 1964–65 at £3,662 less capital allowances of £2,786; and surtax for 1963–64 at £16,359. The taxpayer appealed those assessments on 20 July 1965, and the matter reached the High Court by way of Case Stated from the Commissioners for the Special Purposes of the Income Tax Acts.
It was conceded for the purposes of the case that a substantial part of the taxes collected for those years was allocated to the construction of nuclear weapons, with the intention of deploying those weapons should certain circumstances arise. The taxpayer argued that the imposition of tax was therefore unlawful.
Crucially, the taxpayer's primary argument was not simply that domestic law conflicted with international law in the abstract. Rather, the argument was framed as a conflict between two pieces of domestic legislation: the Geneva Conventions Act 1957 and the Finance Act 1964. The taxpayer contended that, by enacting the Geneva Conventions Act 1957, Parliament had incorporated the Geneva Conventions into domestic statute law, and that the use of tax revenues to fund nuclear weapons was therefore contrary to those incorporated conventions. On this basis, the taxpayer argued that the tax assessments were unlawful and should be set aside.
Held
The High Court dismissed the taxpayer's appeal and upheld the assessments. The decision rested upon two distinct and independent grounds.
First, the court examined the long title and preamble of the Geneva Conventions Act 1957 and concluded that the Act had been passed with a view to subsequent ratification of the conventions by the executive — not by Parliament itself. Ratification was therefore an executive act, not a parliamentary one. As a consequence, the conventions did not become part of the statute law of England. Since the conventions had not been incorporated into statute law, there was no conflict between two statutes, and the Finance Act 1964 prevailed without difficulty.
Second, and independently, the court held that even if the purposes for which the Finance Act 1964 enactments might be used included an unlawful purpose, that could not vitiate the enactments themselves. The statutory charging provisions — ss 12 & 13 Finance Act 1964 — were concerned exclusively with the raising of taxation, not with the purposes to which the proceeds were to be applied. Any challenge to the lawfulness of the use to which tax revenues were put would have to be directed at the invalidation of that use, not at the tax assessments themselves. The assessments were accordingly valid.
Ratio Decidendi
The ratio of the case proceeds from three propositions articulated by the court. First, international law is part of the law of the land, but it yields to statute. Second, conventions which are ratified by an Act of Parliament are incorporated into domestic law and form part of the law of the land. Third, conventions ratified by the executive — but not by Act of Parliament — cannot prevail against a statute expressed in unambiguous terms.
The court drew upon Oppenheim's International Law (8th edition) to explain that treaties bind contracting states at the international level but do not directly bind their subjects. Where a treaty requires the modification of the common law or of existing statute, it must receive parliamentary assent through an enabling Act of Parliament in order to form part of the law of the land.
The court also relied upon Collco Dealings v Inland Revenue Commissioners [1962], in which Viscount Simonds approved the principle drawn from Maxwell on the Interpretation of Statutes: where a statute is unambiguous, its provisions must be followed even if they are contrary to international law.
Applying these principles, the operative provisions of the Finance Act 1964 — in particular s 12, which charged income tax for 1964–65 at the standard rate of 7s 9d in the pound, and s 13, which charged surtax — were unambiguous in their terms. The Geneva Conventions Act 1957, on a proper reading of its preamble and long title, had not incorporated the conventions into domestic statute law. Accordingly, no conflict existed between two statutes, and even on the assumption that one did, the unambiguous terms of the Finance Act 1964 would prevail.
The separate and equally important limb of the ratio is that the validity of a statutory charge to taxation cannot be impugned by reason of the purposes to which the revenue raised by that charge may subsequently be applied. The charging provisions and the spending decisions are legally distinct: the former fall within the scope of a tax challenge; the latter do not.
This decision is a significant authority on the doctrine of parliamentary sovereignty. It affirms that, where Parliament has enacted clear and unambiguous legislation, the courts will apply it regardless of any conflict with unincorporated international obligations. The case is frequently cited alongside Ellen Street Estates v Minister of Health [1934] and Vauxhall Estates v Liverpool Corporation [1932] in discussions of implied repeal and the relationship between domestic statute law and international law.
Obiter Dicta
Not applicable.