b

an agricultural motor vehicle, not being—

i

a track laying vehicle with an unladen weight not exceeding 7370 kg (which falls in item 11);

ii

a category T tractor first used after 1st June 1986 which is driven at more than 40 km/h (which falls in item 8);

iii

a wheeled agricultural vehicle, other than a category T tractor, first used after 1st June 1986 which is driven at more than 20 mph (which falls in item 8); or