Car used preponderantly for business purposes
3(1)The cash equivalent derived from Table A, B or C is to be reduced (or, where paragraph 2 applies, further reduced) by half if it is shown to the inspector's satisfaction that the employee was required by the nature of his employment to make, and made use of the car preponderantly for business travel, which means that such travel must have amounted to at least 25,000 miles in the relevant year.
(2)In relation to a car which for part of the year was unavailable in the sense of paragraph 2 above, the figure of 25,000 miles above mentioned is proportionately reduced.