Document ID: chunk:federal_register_of_legislation:F2023C00919:body:0:p29
Version: federal_register_of_legislation:F2023C00919
Segment Type: other
Provision Reference: 
Character Range: 92205–95507

(other than those provided with the vehicle[7]). Detailed instructions shall be provided by the vehicle manufacturer with the vehicle.
5.3.                                    For all light signalling devices, including those mounted on the side panels, the reference axis of the lamp when fitted to the vehicle shall be parallel to the bearing plane of the vehicle on the road; in addition it shall be perpendicular to the median longitudinal plane of the vehicle in the case of side retro reflectors and of side marker lamps and parallel to that plane in the case of all other signalling devices. In each direction a tolerance of ± 3° shall be allowed. In addition, any specific instructions as regards fitting laid down by the manufacturer shall be complied with.
5.4.                                    In the absence of specific instructions, the height and orientation of the lamps shall be verified with the vehicle unladen and placed on a flat, horizontal surface, in the condition defined in paragraphs 2.24., 2.24.1. and 2.24.2. and, in the case where an AFS is installed, with the system in its neutral state.
5.5.                                    In the absence of specific instructions lamps constituting a pair shall:
5.5.1.                              Be fitted to the vehicle symmetrically in relation to the median longitudinal plane (this estimate to be based on the exterior geometrical form of the lamp and not on the edge of its illuminating surface referred to in paragraph 2.9.);
5.5.2.                              Be symmetrical to one another in relation to the median longitudinal plane, this requirement is not valid with regard to the interior structure of the lamp;
5.5.3.                              Satisfy the same colorimetric requirements and have substantially identical photometric characteristics. This shall not apply to a matched pair of Class F3 front fog lamps;
5.5.4.                              Have substantially identical photometric characteristics.
5.6.                                    On vehicles whose external shape is asymmetrical, the above requirements shall be satisfied so far as is possible.
5.7.                                    Grouped, combined or reciprocally incorporated or single lamps
5.7.1.                              Lamps may be grouped, combined or reciprocally incorporated with one another provided that all requirements regarding colour, position, orientation, geometric visibility, electrical connections and other requirements, if any, are fulfilled.
5.7.1.1.                        The photometric and colorimetric requirements of a lamp shall be fulfilled when all other functions with which this lamp is grouped, combined or reciprocally incorporated are switched OFF.
However, when a front or rear position lamp is reciprocally incorporated with one or more other function(s), which can be activated together with them, the requirements regarding colour of each of these other functions shall be fulfilled when the reciprocally incorporated function(s) and the front or rear position lamps are switched ON.
5.7.1.2.                        Stop lamps and direction-indicator lamps are not permitted to be reciprocally incorporated.
5.7.1.3.                        Where stop lamps and direction-indicator lamps are