Full text
an amount in respect of a taxpayer’s unused foreign tax credit in respect of a country for a taxation year may be claimed under paragraph (2)(a) in computing the taxpayer’s tax payable under this Part for a particular taxation year only to the extent that it exceeds the aggregate of all amounts each of which is the amount that may reasonably be considered to have been claimed in respect of that unused foreign tax credit in computing the taxpayer’s tax payable under this Part for a taxation year preceding the particular taxation year.