(1)The “appropriate percentage” for a car for a year depends upon when the car was first registered.
(2)If the car was first registered on or after 1st January 1998, the “appropriate percentage” depends upon whether the car—
(a)is a car with a CO2 emissions figure (see section 134(1)),
(b)is a car without a CO2 emissions figure (see section 134(2)), or
(c)is a diesel car to which section 141 applies,
and is determined under sections 139 to 141.
(3)If the car was first registered before 1st January 1998, the “appropriate percentage” is determined under section 142.