Document ID: chunk:federal_register_of_legislation:F2023C00133:body:0:p7
Version: federal_register_of_legislation:F2023C00133
Segment Type: other
Provision Reference: 
Character Range: 19459–22602

6.10.1.                          This requirement is considered to have been met if:
6.10.1.1.                    for the visibility of a red light towards the front: there must be no direct visibility of a light-emitting surface of a red lamp if viewed by an observer moving within Zone 1 in a transverse plane situated 25 m in front of the vehicle (see clause 6.11. below),
6.10.1.2.                    for the visibility of a white light towards the rear: there must be no direct visibility of a light-emitting surface of a white lamp if viewed by an observer moving within Zone 2 in a transverse plane situated 25 m behind the vehicle (see clause 6.12. below).
6.11.                                Zone 1 explored by the eye of the observer at the front of the vehicle is bounded:
6.11.1.                          in height, by two horizontal planes 1 m and 2.2 m respectively above the ground,
6.11.2.                          in width, by two vertical planes which, forming to the front and to the rear respectively an angle of 15° outwards from the vehicle's median longitudinal plane, pass through the point or points of contact of vertical planes parallel to the vehicle's median longitudinal plane delimiting the vehicle's overall width; if there are several points of contact, the rearmost shall define the vertical planes.
6.12.                                Zone 2 explored by the eye of the observer at the rear is bounded:
6.12.1.                          in height, by two horizontal planes 1 m and 2.2 m respectively above the ground,
6.12.2.                          in width, by two vertical planes which, forming to the front and to the rear respectively an angle of 15° outwards from the vehicle's median longitudinal plane, pass through the point or points of contact of vertical planes parallel to the vehicle's median longitudinal plane delimiting the vehicle's overall width; if there are several points of contact, the foremost shall define the vertical planes.
6.13.                                The electrical connections shall be such that the 'Front Position (Side) Lamp', the 'Rear Position (Side) Lamp' and the 'Rear-registration-plate Illuminating Device' can only be switched on or off   simultaneously.
6.14.                                In the absence of specific instructions, the electrical connection shall be such that the 'Main-beam Headlamp', the 'Dipped-beam Headlamp' and the fog lamp(s) cannot be switched on unless the lamps referred to in clause 6.13. above are likewise switched on. This requirement need not, however, be satisfied in the case of the 'Main-beam Headlamp' and 'Dipped-beam Headlamp' where their luminous warnings consist in switching on the 'Dipped-beam Headlamp' intermittently, at short intervals, or in switching on the 'Main-beam Headlamp' intermittently, or in switching on the 'Dipped-beam Headlamp' and 'Main-beam Headlamp' alternately at short intervals.
6.15.                                Tell-tales
6.15.1.                          Every tell-tale lamp shall be readily visible to a driver in the normal driving position.
6.15.2.                          Where a