Commonwealth Consolidated Acts Commonwealth Consolidated Acts(1) You must adjust the * cost base and * reduced cost base of an * ownership interest you own in a company or trust if:
(a) a * demerger happens to a * demerger group of which the company or trust is a member; and
(b) you owned an original interest in the * head entity of the demerger group just before the demerger; and
(c) a * CGT event happens to the original interest and you * acquire a new interest under the demerger; and
(d) you do not choose a roll - over under this Subdivision for the original interest.
(2) The adjustments you must make are the same as the adjustments you would have to make under section 125 - 80 for the * cost bases and * reduced cost bases of the remaining original interests and new interests just after the * CGT event if you could have chosen a roll - over under this Subdivision for the * demerger and you had done so.