Document ID: chunk:federal_register_of_legislation:F2023C00919:body:0:p14
Version: federal_register_of_legislation:F2023C00919
Segment Type: other
Provision Reference: 
Character Range: 48946–52177

the meaning of paragraphs 2.2.1. to 2.2.4., but not in such a way as to entail a change in the kind, number, positioning and geometric visibility of the lamps and the inclination of the dipped beam prescribed for the vehicle type in question, and vehicles on which optional lamps are fitted or are absent:
2.2.1.                              The dimension and the external shape of the vehicle;
2.2.2.                              The number and positioning of the devices;
2.2.3.                              The headlamp-levelling system;
2.2.4.                              The suspension system.
2.3.                                    "Transverse plane" means a vertical plane perpendicular to the median longitudinal plane of the vehicle.
2.4.                                    "Unladen vehicle" means a vehicle without driver, crew, passengers and load, but with a full supply of fuel, spare wheel and the tools normally carried.
2.5.                                    "Laden vehicle" means a vehicle loaded to its technically permissible maximum mass, as stated by the manufacturer, who shall also fix the distribution of this mass between the axles in accordance with the method described in Annex 5.
2.6.                                    "Device" means an element or an assembly of elements used to perform one or more functions.
2.6.1.                              "Lighting function" means the light emitted by a device to illuminate the road and objects in the direction of vehicle movement.
2.6.2.                              "Light-signalling function" means the light emitted or reflected by a device to give to other road users visual information on the presence, identification and/or the change of movement of the vehicle.
2.7.                                    "Lamp" means a device designed to illuminate the road or to emit a light signal to other road users. Rear registration plate lamps and retro-reflectors are likewise to be regarded as lamps. For the purpose of this Regulation, light-emitting rear registration plates and the service-door-lighting system according to the provisions of Regulation No. 107 on vehicles of categories M2 and M3 are not considered as lamps.
2.7.1.                              Light source
2.7.1.1.                        "Light source" means one or more elements for visible radiation, which may be assembled with one or more transparent envelopes and with a base for mechanical and electrical connection.
2.7.1.1.1.              "Replaceable light source" means a light source which is designed to be inserted in and removed from the holder of its device without tool.
2.7.1.1.2.              "Non-replaceable light source" means a light source, which can only be replaced by replacement of the device to which this light source is fixed.
              (a) In case of a light source module: a light source which can only be replaced by replacement of the light source module to which this light source is fixed;
              (b) In case of adaptive front-lighting systems (AFS): a light source which can only be replaced by replacement of the lighting unit to which this light source is fixed.
2.7.1.1.3.              "Light source module" means an optical part of