75General limit on amount of writing-down allowance
(1)The amount of the writing-down allowance to be made to a person for a chargeable period in respect of qualifying expenditure incurred on the provision of a car to which section 74 applies must not exceed £3,000.
(2)The limit under subsection (1) is proportionately increased or reduced if the chargeable period is more or less than a year.
(3)The amount of the writing-down allowance may be further limited under—
section 76 (expenditure met by another person),
section 77 (effect of use partly for other purposes), or
section 78 (effect of partial depreciation subsidy).