580. A taxpayer resident in Canada, in computing his income for a taxation year, must include as income from each share owned by him of the capital stock of a controlled foreign affiliate of the taxpayer, the percentage of the foreign accrual property income of any controlled foreign affiliate of the taxpayer, for each taxation year of the affiliate ending in the taxation year of the taxpayer, equal to that share’s participating percentage in respect of the affiliate, determined at the end of each such taxation year of the affiliate.