As respects the year of assessment 1996-97 and subsequent years of assessment, section 4 of the Finance Act, 1982, is hereby amended -
(a) by the insertion of the following subsection after subsection (4):
(a) Where, for a year of assessment -
(i) a person, in the performance of the duties of his employment, spends 70 per cent. or more of his time engaged on such duties away from the place of business of his employer, and
(ii) in relation to that person, the business mileage exceeds 5,000,
then, if the person so elects in writing to the inspector, the cash equivalent of the benefit of the car for that year in relation to the person shall, instead of being the amount ascertained under subsection (3) or (4), as may otherwise be appropriate, be four-fifths of the amount ascertained under subsection (3).
(b) When requested in writing by the inspector, a person who makes an election under paragraph (a) for a year of assessment shall, within 30 days of the date of such request, fu