451Amount of charge
This section has no associated Explanatory Notes
(1)The taxable amount for the purposes of section 449 (charge on occurrence of chargeable event) is—
(a)the amount by which the value of the shares is increased by the chargeable event, or
(b)if that amount is affected by the occurrence of some other event, the amount by which that value would have been increased but for that other event.
(2)If the interest of the employee is less than full beneficial ownership, the taxable amount is an appropriate proportion of the amount mentioned in subsection (1)(a) or (b).