the choice of the form of transaction by which a taxpayer obtains the benefit of his assets is a matter for him: he is quite entitled to choose that form of transaction which will not subject him to tax, or subject him only to less tax than some other form of transaction might do. Inland Revenue Commissioners v Duke of Westminster [5] , too easily forgotten, is still basic in this area of the law. There is no room in that area for any doctrine of economic equivalence. To the legal form and consequence of the taxpayer's transaction, which in fact has taken place, effect must be given: see Inland Revenue Commissioner (N.Z.) v Europa Oil (N.Z.) Ltd. [6] .
As the above passage makes clear, this statement of a "choice" theory has nothing to do with a legislative intent to give a choice between specific alternatives. It is a general "choice" of legal "form" to which "effect must be given". Aickin J. [7] quoted extensively from the judgment of Barwick C.J. in Mullens including the statement that s. 260 will not apply "if the transaction, being the actual transaction between the parties, conforms to and satisfies a provision of the Act even if it has taken the form in which it was entered into by the parties in order to obtain the benefit of that provision of the Act" (per Barwick C.J. in Mullens [8] ). Aickin J. added [9] that, in his opinion, that was equally the position "where the actual transaction is one which stands wholly outside the operation of" the Act. His Honour also quoted [10] , with approval, that part of the judgment of Stephen J. in Mullens in which Stephen J., having referred to the situation where, as in Keighery [11] , "the Act offers to the taxpayer a choice of alternative tax consequences", said [12] :
So, too, if no question arises of a choice between two courses of conduct but, instead, the Act offers certain tax benefits to taxpayers who adopt a particular course of conduct; the adoption of that course does not establish any purpose or effect such as is described in s. 260. Instead, an assessment which reflects the tax consequences of the course of conduct which the taxpayer has in fact adopted will then represent a due and proper incidence of tax, there will be no relief from, or defeating of, liability to tax and the Act will have the very operation which the legislature intended.
Aickin J. commented [13] :
That principle equally applies in a case of receipts with which the Act simply does not deal, i.e. capital receipts, save such as are for the purpose of the Act deemed to be income. To adopt a course which produces a result outside the scope of the Act is not to alter the incidence of tax, or to defeat any liability to tax or prevent the operation of the Act, notwithstanding that such course is adopted with full knowledge of the provisions of the Act and with a conscious intention that the proceeds should not fall within the operation of the Act.
The third member of the Court in Slutzkin, Stephen J. [14] , while adding some comments of his own, indicated general agreement with the reasons for judgment of Barwick C.J. and Aickin J.
1. (1977) 140 C.L.R. 314.
2. (1976) 135 C.L.R. 290.
3. (1977) 140 C.L.R., at p. 319.
4. [1936] A.C. 1.
5. [1971] A.C. 760.
6. (1977) 140 C.L.R., at p. 326.
7. (1976) 135 C.L.R., at p. 302.
8. (1977) 140 C.L.R., at pp. 326-327.
9. (1977) 140 C.L.R., at p. 327.
10. (1957) 100 C.L.R. 66.
11. (1976) 135 C.L.R., at p. 318.
12. (1977) 140 C.L.R., at p. 327.
13. (1977) 140 C.L.R., at p. 322.