Paragraph 12 Display of orange-coloured panels, UN numbers and emergency action codes
Where the size and construction of the vehicle are such that the available surface area is insufficient to display orange-coloured panels conforming to the dimensions specified in figures 1, 2 or 3, as the case may be, the dimensions of the orange-coloured panels displayed may be reduced to 300 mm at the base, 120 mm in height and with a black border measuring 10 mm.