“[74] Nevertheless, the context of Chapter 2 provides some indication of what Parliament intended. Part 7 is clearly concerned with particular taxation issues which arise when employees are remunerated in shares and other securities. As was noted in para 12 above, the purposes of Part 7 were identified in broad terms in Grays Timber Products as being threefold: (1). to promote employee share ownership, particularly by encouraging share incentive schemes; (2). since such schemes require benefits to be contingent on future performance, creating a problem if tax is charged on the acquisition of the shares in accordance with Abbott v Philbin, to wait and see in such cases until the contingency has fallen away; and (3). to counteract consequent opportunities for tax avoidance. [75] The background to Chapter 2, explained more fully in paras 3-11 above, supports that view. Fiscal legislation concerning employment-related securities had its origins in anomalies which arose where shares awarded to employees as a form of remuneration, for business or commercial reasons, were subject to restrictions designed to incentivise future performance. The taxation of the shares in accordance with general principles of the law of taxation, as established in Weight v Salmon and more particularly in Abbott v Philbin, had the effect that the sum charged to tax failed to reflect the economic gain realised by the employee in the event that the shares increased in value as intended. Parliament’s response was to impose a charge to tax when the restrictions were lifted (subject to the exemption of favoured arrangements), rather than when the shares were acquired. Chapter 2, as originally enacted, re-enacted provisions introduced in 1988 in order to prevent the application of Abbott v Philbin, and forestall consequent opportunities for tax avoidance. The amended version of Chapter 2 with which these appeals are concerned was enacted shortly afterwards to address aspects of the previous provisions which were considered to leave them vulnerable to avoidance or to create anomalies. The structure of the legislation continued to be based on the exemption of restricted securities from income tax when the shares were acquired, and the imposition of a charge to tax when the restrictive conditions were lifted, subject to a widely drawn exemption from the latter charge. [76] It is in the context explained in para 74, and against the background described in para 75, that it is necessary to consider the scope of the exemption on acquisition conferred by section 425(2), and more specifically the question whether, in section 423(1), the words “any contract, agreement, arrangement or condition which makes provision to which any of subsections (2) to (4) applies” should be construed as referring to “provision” with a genuine business or commercial purpose. [77] Approaching the matter initially at a general level, the fact that Chapter 2 was introduced partly for the purpose of forestalling tax avoidance schemes self-evidently makes it difficult to attribute to Parliament an intention that it should apply to schemes which were carefully crafted to fall within its scope, purely for the purpose of tax avoidance. Furthermore, it is difficult to accept that Parliament can have intended to encourage by exemption from taxation the award of shares to employees, where the award of the shares has no purpose whatsoever other than the obtaining of the exemption itself: a matter which is reflected in the fact that the shares are in a company which was brought into existence merely for the purposes of the tax avoidance scheme, undertakes no activity beyond its participation in the scheme, and is liquidated upon the termination of the scheme. The encouragement of such schemes, unlike the encouragement of employee share ownership generally, or share incentive schemes in particular, would have no rational purpose, and would indeed be positively contrary to rationality, bearing in mind the general aims of income tax statutes. [78] More specifically, it appears from the background to the legislation that the exemption conferred by section 425(2), in respect of the acquisition of securities which are “restricted securities” by virtue of section 423(2), was designed to address the practical problem which had arisen of valuing a benefit which was, for business or commercial reasons, subject to a restrictive condition involving a contingency. The context was one of real-world transactions having a business or commercial purpose. There is nothing in the background to suggest that Parliament intended that section 423(2) should also apply to transactions having no connection to the real world of business, where a restrictive condition was deliberately contrived with no business or commercial purpose but solely in order to take advantage of the exemption. On the contrary, the general considerations discussed in para 77 above, and the approach to construction explained in paras 64 and 68 above, point towards the opposite conclusion.”