Regulation 21 Display of certificatesI1
Northern Ireland
Where a goods vehicle test certificate is issued under regulation 14, Part 2 of that certificate shall be attached to the vehicle in a securely fitted weather-proof holder and shall be carried on the vehicle at all times when the vehicle is on the road and shall be displayed –
in the case of a vehicle fitted with a front windscreen extending across the vehicle to its near side, on the near side of the windscreen so that all particulars are clearly visible by daylight from in front of the vehicle; or
in all other cases, on the near side of the vehicle not less than 610 millimetres and not more than 1,830 millimetres above the surface of the road so that all particulars are clearly visible by daylight to a person standing at the near side of the vehicle.