This section applies where—
If the tax is charged before the death of the survivor, the percentage referred to in subsection (3) of section 8A above is (instead of that specified in subsection (4) of that section)—
If the tax is charged after the death of the survivor, it is charged as if the personal nil-rate band maximum of the deceased person were appropriately reduced.
In subsection (4) above—
"the personal nil-rate band maximum of the deceased person" is the nil rate band maximum which is treated by Schedule 2 to this Act as applying in relation to the deceased person's death, increased in accordance with section 8A above where that section effected an increase in that nil-rate band maximum in the case of the deceased person (as survivor of another deceased person), and
"appropriately reduced" means reduced by the amount (if any) by which the amount on which tax was charged at the rate of nil per cent. on the death of the survivor was increased by reason of the operation of section 8A above by virtue of the position of the deceased person.