23. Where property is used in a fiscal year both for the processing of ore and for another purpose, the part of the amount determined under subparagraph a of paragraph 1 of section 21 that relates to that property shall be reduced by an amount equal to the proportion of that part of the amount, determined without reference to this section or section 23.1, that the use of the property for a purpose other than processing for that fiscal year is of the total use of the property for that fiscal year.
1975, c. 30, s. 23; 1994, c. 47, s. 24; 1999, c. 83, s. 15.