360R48. The expenditures used in computing the aggregate referred to in subparagraph a of the second paragraph of section 360R42 are the expenditures incurred by a taxpayer after 7 November 1969 and before the particular time referred to in this section and each of which(a) was a Canadian exploration and development expense or would have been such an expense if it had been incurred after 1971, and was actually incurred before 7 May 1974 in the case of an oil business and before 1 April 1975 in the case of a mining business, other than an expense referred to in section 360R50;
(b) was a Canadian exploration expense, other than an expense referred to in section 360R51;
(c) was a Canadian development expense incurred before 1981, other than an expense referred to in section 360R52; or
(d) was the capital cost of a property used for processing, other than a property referred to in section 360R53.