If you choose the roll-over, you can choose to disregard all or part of each * capital gain to which this Subdivision applies.
Note: If you choose to disregard only some of the capital gain, you make a capital gain equal to the remaining amount.
Example: The original capital gain was $100,000. You have reduced it to $25,000 under other concessions (apart from the roll-over). If you choose to disregard $20,000, you are left with a final capital gain of $5,000.