“Whether, as a matter of law, if section 15 of [ITTOIA] applies to the diving activities of [Mr. Fowler] during the tax years 2011-12 and 2012-13, [Mr. Fowler] cannot be liable to income tax in the UK for those years in respect of his income from those activities by reason of Article 7, or alternatively Article 20, of the [Double Tax Treaty] 25 or whether [Mr. Fowler] may be liable to income tax for those years in respect of his income from those activities by reason of Article 14 of the Treaty.”
“(1) For the purposes of this [Double Tax Treaty], unless 5 the context otherwise requires: … (d) the term “business” includes the performance of professional services and of other activities of an independent character; 10 … (g) the term “enterprise” applies to the carrying on of any business; (h) the terms “enterprise of a Contracting State” and “enterprise of the other Contracting State” mean respectively an enterprise carried on by a resident of a Contracting State and an enterprise carried on by a resident of the other 15 Contracting State…”
“As regards the application of the provisions of this Convention at any time by a Contracting State, any term not defined therein shall, unless the context otherwise requires, have the meaning that it has at that time under the law of that State for the 20 purposes of the taxes to which this Convention applies, any meaning under the applicable tax laws of that State prevailing over a meaning given to the term under other laws of that State.”
“(1) The profits of an enterprise of a Contracting State shall be taxable only in that 25 State unless the enterprise carries on business in the other Contracting State through a permanent establishment situated therein. If the enterprise carries on business as aforesaid, the profits of the enterprise may be taxed in the other State but only so much of them as is attributable to that permanent establishment.”
“The correct approach to the construction of the [treaty] it is not, I think, controversial. The Special Commissioners adopted the summary by Mummery J. (as he then was) in Inland Revenue Commissioners v. Commerzbank[1990] STC 285 at p.297 of the principles of interpretation laid down by the House of Lords in Fothergill v. Monarch 10 Airlines[1981] AC 251 . This summary has subsequently been approved by the Court of Appeal in Memec v. Inland Revenue Commissioners[1998] STC 754 as a correct statement of the law. In his judgement, Mummery J. said that: (1) It is necessary to look first for a clear meaning of the words used in the relevant article of the convention, bearing in mind that “consideration of the purpose of an 15 enactment is always a legitimate part of the process of interpretation”: per Lord Wilberforce (at 272) and Lord Scarman (at 294). A strictly literal approach to interpretation is not appropriate in considering legislation which gives effect to or incorporates an international treaty: per Lord Fraser (at 285) and Lord Scarman (at 290). A literal interpretation may be obviously inconsistent with the purposes of the 20 particular article or of the treaty as a whole. If the provisions of a particular article are ambiguous, it may be possible to resolve that ambiguity by giving a purposive construction to the convention looking at it as a whole by reference to its language as set out in the relevant United Kingdom legislative instrument: per Lord Diplock (at 279). 25 (2) The process of interpretation should take account of the fact that: “The language of an international convention has not been chosen by an English parliamentary draftsman. It is neither couched in the conventional English legislation idiom nor designed to be construed exclusively by English judges. It is addressed to a much wider and more varied judicial audience than is an Act of Parliament which deals 30 with purely domestic law. It should be interpreted, as Lord Wilberforce put it in James Buchanan & Co. Ltd v. Babco Forwarding & Shipping (UK) Ltd[1987] AC 141 at 152, “unconstrained by technical rules of English law, or by English legal precedent, but on broad principles of general acceptation”: per Lord Diplock (at 281-282) and Lord Scarman (at 293).” 35 (3) Among those principles is the general principle of international law, now embodied in article 31(1) of the Vienna Convention on the Law of Treaties, that “a treaty should be interpreted in good faith and in accordance with the ordinary meaning to be given to the terms of the treaty in their context and in the light of its object and purpose.”
“Put shortly, the aim of interpretation of a treaty is therefore to establish, by objective and rational means, the common intention which can be ascribed to the parties. That 25 intention is ascertained by considering the ordinary meaning of the terms of the treaty in their context and in the light of the treaty’s object and purpose. Subsequent agreement as to the interpretation of the treaty, and subsequent practice which establishes agreement between the parties, are also to be taken into account, together with any relevant rules of international law which apply in the relations between the 30 parties. Recourse may also be had to a broader range of references in order to confirm the meaning arrived at on that approach, or if that approach leaves the meaning ambiguous or obscure, or leads to a result which is manifestly absurd or unreasonable.”
“In the employment income Parts “employment” includes in particular – (a) any employment under a contract of service, (b) any employment under a contract of apprenticeship, and (c) any employment in the service 5 of the Crown.”
“The charge to tax on employment income under this Part is a charge to tax on – 35 (a) general earnings, and (b) specific employment income. 13 The meaning of “employment income”, “general earnings” and “specific employment income” is given in section 7.”
“(1) This section gives the meaning for the purposes of the Tax Acts of “employment income”, “general earnings” and “specific 5 employment income”. (2) “Employment income” means – (a) earnings within Chapter 1 of Part 3, (b) any amount treated as earnings (see subsection (5)), or (c) any amount which counts as employment income (see subsection (6)). 10 (3) “General earnings” means – (a) Earnings within Chapter 1 of Part 3, or (b) any amount treated as earnings (see subsection (5)), excluding in each case any exempt income. (4) “Specific employment income” means any amount which counts as employment 15 income (see subsection (6)), excluding any exempt income.”
“Employment income is not charged to tax under this Part if it is within the charge to tax under Part 2 of ITTOIA 2005 (trading income) by virtue of section 15 of that Act (divers and diving supervisors).”
“The UK tax provisions which correspond to “salaries, wages and other similar remuneration derived…in respect of an employment” are plainly those (so far as relevant to this appeal) to be found in sections 1, 4, 6, 7, 9 and 62 ITEPA 2003. Section 1 charges to income tax “employment income”
“[103] I have found this issue much less easy. It is to my mind a short but very 25 difficult point of statutory construction. The unanimous view of the very experienced judges in courts below commands great respect. But in the end I have come to the conclusion, differing most reluctantly from the courts below, that they reached the wrong conclusion because they did not give enough weight to two factors. One is that in applying the DTAs it is necessary to look, not only at their terms, but also at the 30 language of section 788(3)(d), which uses a technical expression of domestic tax law, “qualifying distribution”