High Quality Content by WIKIPEDIA articles! In Hong Kong, vehicle registration marks are managed by the Transport Department. The number plates are not provided by the government, but are made by garages to the order of the car owner.Each vehicle must display 2 number plates, one in the front and one at the rear of the vehicle. The front plate has black characters on a white background, and the rear plate has black characters on a yellow background. The height of the letters and numerals are not less than 8 cm (3.1 in) and not more than 11 cm (4.3 in). The plates should comply with British Standard B.S. 145a and have permanently marked on the plate the specification number "B.S. AU 145a".