21.4.23. In computing, in a functional currency year of a taxpayer, the amount for which a pre-transition debt of the taxpayer (other than a pre-transition debt denominated in the taxpayer’s elected functional currency) was issued and its principal amount at the beginning of the taxpayer’s first functional currency year, those amounts are to be converted from the pre-transition debt currency to the taxpayer’s elected functional currency using the relevant spot rate for the last day of the taxpayer’s last Canadian currency year.