Versions of s. 142.4(1), definition “tax basis”, para (f)
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an amount in respect of the obligation that was included in computing the taxpayer’s income for a taxation year ending at or before that time in respect of changes in the value of the obligation attributable to the fluctuation in the value of a currency of a country other than Canada relative to Canadian currency, other than an amount included under paragraph 142.3(1)(a),