""(1) For the purposes of this section - 'Arrangement' means any contract, agreement, plan, or understanding (whether enforceable or unenforceable) including all steps and transactions by which it is carried into effect: 'Liability' includes a potential or prospective liability in respect of future income: 'Tax avoidance' includes - (a) Directly or indirectly altering the incidence of any income tax: (b) Directly or indirectly relieving any person from liability to pay income tax: (c) Directly or indirectly avoiding, reducing, or postponing any liability to income tax. (2) Every arrangement made or entered into, whether before or after the commencement of this Act, shall be absolutely void as against the commissioner for income tax purposes if and to the extent that, directly or indirectly, - (a) Its purpose or effect is tax avoidance; or (b) Where it has two or more purposes or effects, one of its purposes or effects (not being a merely incidental purpose or effect) is tax avoidance, whether or not any other or others of its purposes or effects relate to, or are referable to, ordinary business or family dealings, - whether or not any person affected by that arrangement is a party thereto. (3) Where an arrangement is void in accordance with subsection (2) of this section, the assessable income and the non-assessable income of any person affected by that arrangement shall be adjusted in such manner as the commissioner considers appropriate so as to counteract any tax advantage obtained by that person from or under that arrangement , and, without limiting the generality of the foregoing provisions of this subsection, the Commissioner may have regard to such income as, in his opinion, either- (a) That person would have, or might be expected to have, or would in all likelihood have, derived if that arrangement had not been made or entered into; or (b) That person would have derived if he had been entitled to the benefit of all income, or of such part thereof as the Commissioner thinks proper, derived by any other person or persons as a result of that arrangement. (4)Where any income is included in the assessable income of any person pursuant to subsection (3) of this section, then, for the purposes of this Act, that income shall be deemed to have been derived by that person and shall be deemed not to have been derived by any other person."
"Except in proceedings on objection to an assessment under Part III of this Act, no assessment made by the Commissioner shall be disputed in any Court or in any proceedings (including proceedings before a Taxation Review Authority) either on the ground that the person so assessed is not a taxpayer or on any other ground; and, except as aforesaid, every assessment and all the particulars thereof shall be conclusively deemed and taken to be correct, and the liability of the person so assessed shall be determined accordingly."
"The true issue is not whether the question of solvency was important to the Commissioner and a major motivating factor – as I have no doubt that it was. It is whether the Commissioner lacked honest and reasonable belief that he was entitled to assess the plaintiffs…. I am satisfied that the Commissioner's decision to shift from Track A to Track B was not 'simply because [the trading company] was not solvent'. The true reason for the decision is that both [the trading company] and [the O'Neils] were seen by the Commissioner as having obtained a tax advantage. "