I-3 - Taxation Act

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29. Where income or loss is from an office, employment, business, property or other source in Canada or in another place, or where income or loss is from an office, employment or business performed or carried on partly in Canada and partly in another place, the taxpayer shall compute separately the income or loss from each source according to the place and shall only apply to it such part of the deductions provided by this Part as may reasonably be applied to such source according to the place.
Notwithstanding the first paragraph, the deductions permitted by sections 334 to 358.0.4 shall, subject to the third paragraph, be applied to the whole income of the taxpayer.
For the purposes of Part II and sections 671, 671.1 and 772.2 to 772.13, in respect of income or loss from a source in Canada or in another place or from an office, employment or business, performed or carried on partly in Canada and partly in another place,
(a)  subject to subparagraph b, the deductions permitted in computing the income of the taxpayer under this Part, except those permitted by paragraphs c to e and j of section 336, sections 336.0.3 and 336.0.4, paragraphs b to g and i of section 339 and sections 340 and 341, shall be applied separately to the income from each of those places;
(b)  the deductions permitted by paragraphs a and b of section 657 shall not be applied to income from a source in a country other than Canada.
1972, c. 23, s. 24; 1990, c. 59, s. 33; 1994, c. 22, s. 60; 1995, c. 1, s. 15; 1995, c. 63, s. 18; 1997, c. 85, s. 35; 1998, c. 16, s. 30; 2005, c. 38, s. 51; 2011, c. 1, s. 22.
29. Where income or loss is from an office, employment, business, property or other source in Canada or in another place, or where income or loss is from an office, employment or business performed or carried on partly in Canada and partly in another place, the taxpayer shall compute separately the income or loss from each source according to the place and shall only apply to it such part of the deductions provided by this Part as may reasonably be applied to such source according to the place.
Notwithstanding the first paragraph, the deductions permitted by sections 334 to 358.0.3 shall, subject to the third paragraph, be applied to the whole income of the taxpayer.
For the purposes of Part II and sections 671, 671.1 and 772.2 to 772.13, in respect of income or loss from a source in Canada or in another place or from an office, employment or business, performed or carried on partly in Canada and partly in another place,
(a)  subject to subparagraph b, the deductions permitted in computing the income of the taxpayer under this Part, except those permitted by paragraphs c to e and j of section 336, sections 336.0.3 and 336.0.4, paragraphs b to g and i of section 339 and sections 340 and 341, shall be applied separately to the income from each of those places;
(b)  the deductions permitted by paragraphs a and b of section 657 shall not be applied to income from a source in a country other than Canada.
1972, c. 23, s. 24; 1990, c. 59, s. 33; 1994, c. 22, s. 60; 1995, c. 1, s. 15; 1995, c. 63, s. 18; 1997, c. 85, s. 35; 1998, c. 16, s. 30; 2005, c. 38, s. 51.