(a)section 120 (benefit of car treated as earnings) or 120A (benefit of a car treated as earnings: optional remuneration arrangements) of ITEPA treat the benefit of a car as giving rise to an amount as earnings of an employee received in a tax year, and
(b)one or more of the following occurs in a tax quarter–
(i)the car becomes available;
(ii)the car becomes unavailable;
(iii)the car is available and the employee's employment becomes subject to the benefits code (as defined by regulation 85(3)).