Commonwealth Consolidated Acts Commonwealth Consolidated ActsThis Subdivision sets out in several steps the procedure for determining by the deemed rate of return method whether any foreign investment fund income accrued to a person ( the taxpayer ) from a particular FIF in respect of a notional accounting period ( the relevant period ). In following the procedure it is necessary to determine the value of an interest in a FIF on a day called the relevant day , which has the meaning given by section 545, and then to apply a specified rate of return to that value.