463. Where section 459 applies in respect of the transfer of property by a taxpayer to one of his children for an amount less than the fair market value of the property immediately before the transfer and where, in a taxation year during which he has not reached 18 years of age, the transferee disposes of the property, the following rules apply during the lifetime of the transferor while he is resident in Canada:(a) the amount, if any, by which the aggregate of the transferee’s taxable capital gains for the year from dispositions of property so transferred exceeds the aggregate of the transferee’s allowable capital losses from such dispositions or the amount, if any, by which the aggregate of such losses exceeds, in the year, the aggregate of such gains is deemed to be a taxable capital gain or an allowable capital loss, as the case may be, of the transferor for the year from dispositions of property;
(b) any taxable capital gain or allowable capital loss taken into account in computing an amount described in paragraph a is, except for the purposes of that paragraph, to the extent that the amount so described is deemed by virtue of this section to be a taxable capital gain or an allowable capital loss of the transferor, deemed not to be a taxable capital gain or an allowable capital loss, as the case may be, of the transferee.