Where a gift would be abated owing to an insufficiency of assets and without regard to any tax chargeable, the gift shall be treated for the purposes of the following provisions of this Chapter as so abated.
Where the value attributable, in accordance with section 38 below, to specific gifts exceeds the value transferred the gifts shall be treated as reduced to the extent necessary to reduce their value to that of the value transferred; and the reduction shall be made in the order in which, under the terms of the relevant disposition or any rule of law, it would fall to be made on a distribution of assets.