“312.5. A taxpayer shall also include any amount received under an order of a competent tribunal as a reimbursement of an amount deducted under any of paragraphs a to b of subsection 1 of section 336, as it read for that preceding year, in computing the taxpayer’s income for a preceding taxation year, or that could have been so deducted were it not for section 334.1, as it read for that preceding year, or an amount that would have been deductible under section 336.0.3 in computing the taxpayer’s income for the year or a preceding taxation year had the version of that section, enacted by subparagraph a of paragraph 5 of section 79.3 of the Act respecting income support, employment assistance and social solidarity, applied from the taxation year 1997.”;