88.4. Any person who carries on or has carried on any of the activities referred to in section 88.3 may, in computing the person’s income for a taxation year, deduct in respect of the exploration or development expenses referred to in section 88.5 incurred in Canada before 1 January 1972 by the person and in respect of which the person is entitled to a deduction for that taxation year under section 29 of the Income Tax Application Rules (Revised Statutes of Canada, 1985, chapter 2, 5th Supplement) and subsection 4 of section 34 of those Rules, an amount equal to the amount that is deductible, in respect of those expenses, in computing the person’s income for the taxation year under that section 29 and that subsection 4.
Expenses referred to in the first paragraph that are deemed, under subsections 14 and 21 of section 29 of the Income Tax Application Rules, to be expenses incurred by a person at a particular time after 31 December 1971 for the purposes of sections 66, 66.1 and 66.2 of the Income Tax Act (Revised Statutes of Canada, 1985, chapter 1, 5th Supplement), are deemed to be such expenses incurred by that person at that time for the purposes of sections 362 to 418.1 of the Taxation Act (chapter I-3).