1175.5. A life insurer may deduct from its tax otherwise payable under this Part for a taxation year, an amount equal to the amount by which its tax payable for the year under Part I exceeds the aggregate of all amounts each of which is an amount the life insurer is deemed, under Chapter III. 1 of Title III of Book IX of Part I, to have paid to the Minister as partial payment of its tax payable under Part I for the year.