156.5. Subject to the second paragraph, a taxpayer other than a trust may deduct, in computing the taxpayer’s income from a business for a taxation year,(a) where the taxpayer is an individual, the proportion of the amount determined for the year in respect of the individual under the first paragraph of section 156.6 that the aggregate of the income earned in Québec and elsewhere by the individual for the year is of the income earned in Québec by the individual for the year;
(b) where the taxpayer is a corporation, the proportion of the amount determined for the year in respect of the corporation under the first paragraph of section 156.6 that the aggregate of the business carried on in Canada or in Québec and elsewhere by the corporation in the year is of the business carried on in Québec by the corporation in the year;
(c) (subparagraph repealed).
No deduction may be made by a taxpayer under the first paragraph, in computing the taxpayer’s income from a business for a taxation year, in respect of property acquired from a person or partnership with whom or with which the taxpayer was not dealing at arm’s length at the time of acquisition if(a) the property is property acquired by the person or partnership before 26 March 1997 or after 25 March 1997 pursuant to an obligation in writing entered into before 26 March 1997 or the construction of which, by or on behalf of the person or partnership, had begun by 25 March 1997;
(b) the person or partnership was entitled to deduct, for a taxation year or fiscal period, as the case may be, preceding the taxation year or fiscal period in which the property was disposed of, an amount in computing the person’s or partnership’s income from a business under the first paragraph or under the first paragraph of section 156.5.1, as the case may be, in respect of the property; or
(c) this paragraph or the second paragraph of section 156.5.1 applied to the person or partnership in respect of the property.