Document ID: chunk:federal_register_of_legislation:F2016C00338:front:0:p9
Version: federal_register_of_legislation:F2016C00338
Segment Type: other
Provision Reference: 
Character Range: 26884–29775

for the rear registration plate; such a device may consist of several optical components;

       2.5.11. "front position lamp" means the lamp used to indicate the presence of the vehicle when viewed from the front;

       2.5.12.  "rear position lamp" means the lamp used to indicate the presence of the vehicle when viewed from the rear;

       2.5.13.  "retro-reflector" means a device used to indicate the presence of a vehicle by the reflection of light emanating from a light source not connected to the vehicle, the observer being situated near the source;

        For the purpose of this Regulation, retro-reflecting number plates the following are not considered as retro-reflectors:

       2.5.14.  "hazard warning signal" means the simultaneous operation of all of a vehicle's direction- indicator lamps to show that the vehicle temporarily constitutes a special danger to other road users;

       2.5.15.  "front fog lamp" means the lamp used to improve the illumination of the road in case of fog, snowfall, rainstorms or dust clouds;

       2.5.16.  "rear fog lamp" means the lamp used to make the vehicle more easily visible from the rear in dense fog;

       2.6.  "Light-emitting surface" of a "lighting device", "light-signalling device" or a retroreflector means all or part of the exterior surface of the transparent material as declared in the request for approval by the manufacturer of the device on the drawing, see annex 3;

       2.7.  "Illuminating surface" (see annex 3);

       2.7.1.  "Illuminating surface of a lighting device" (paragraphs. 2.5.6., 2.5.7. and 2.5.15.) means the orthogonal projection of the full aperture of the reflector, or in the case of headlamps with an ellipsoidal reflector of the "projection lens", on a transverse plane. If the lighting device has no reflector, the definition of paragraph 2.7.2. shall be applied. If the light emitting surface of the lamp extends over part only of the full aperture of the reflector, then the projection of that part only is taken into account.

        In the case of a passing beam headlamp, the illuminating surface is limited by the apparent trace of the cut-off on to the lens. If the reflector and lens are adjustable relative to one another, the mean adjustment should be used;

       2.7.2.  "Illuminating surface of a light-signalling device other than a retro-reflector" (paragraphs 2.5.8., 2.5.9., 2.5.11., 2.5.12., 2.5.14. and 2.5.16.) means the orthogonal projection of the lamp in a plane perpendicular to its axis of reference and in contact with the exterior light-emitting surface of the lamp, this projection being bounded by the edges of screens situated in this plane, each allowing only 98 % of the total luminous intensity of the light to persist in the direction of the axis of reference. To determine the lower, upper and lateral limits of the illuminating surface,