Document ID: chunk:federal_register_of_legislation:F2023C00136:reg:113:p16
Version: federal_register_of_legislation:F2023C00136
Segment Type: reg
Provision Reference: reg 113 (pt 16/21)
Character Range: 57803–60851

reference centres are symmetrical in relation to the median longitudinal plane of the vehicle.
         6.1.3.2. The length: at the front of the vehicle. This requirement is regarded as satisfied if the light emitted does not cause discomfort to the driver either directly or indirectly by means of the rear-view mirrors and/or reflective surfaces on the vehicle.
         6.1.3.3. In any case, the distance between the edge of the illuminating surface of any independent driving lamp and the edge of that of the lamp producing the principal passing-beam must not exceed 200 mm. The distance between the edge of the illuminating surface of any independent driving lamp and the ground must be from 500 mm to 1,300 mm.
         6.1.3.4. In the case of two driving lamps: the distance separating the illuminating surfaces of two driving lamps must not exceed 200 mm.
6.1.4. Geometric visibility
The visibility of the illuminating surface, including its visibility in areas which do not appear to be illuminated in the direction of observation considered, shall be ensured within a divergent space defined by generating lines based on the perimeter of the illuminating surface and forming an angle of not less than 5° with the axis of reference of the headlamp.
6.1.5. Orientation
         6.1.5.1. Forwards. The lamp(s) may move with the steering angle.
         6.1.5.2. An HIAS may be installed for the driving-beam.
6.1.6. Electrical connections
The passing-beam(s) may remain illuminated with the driving-beam(s).
6.1.7. Tell-tales
         6.1.7.1. "Circuit-closed" tell-tale.
         6.1.7.2. Mandatory, non-flashing blue signal lamp.
         6.1.7.3. "HIAS failure" tell-tale
         6.1.7.4. Mandatory, flashing amber signal lamp, which may be combined with the tell tale referred to in paragraph 6.2.8.2. below. It shall be activated whenever a failure is detected with respect to the HIAS signals. It shall remain activated while the failure is present.
6.1.8. Other requirements
         6.1.8.1. The aggregate maximum intensity of the driving-beam headlamps, which can be switched on simultaneously, shall not exceed 430,000 cd, which corresponds to a reference number of 100. (The approval value).
         6.1.8.2. In the event of a driving-beam HIAS failure, without the use of any special tools, it shall be possible to:
            (a) Deactivate the HIAS until it is reset according to the manufacturer's instructions; and
            (b) Re-position the driving-beam so that its horizontal and vertical alignments are the same as a headlamp not equipped with HIAS.
         6.1.8.3. The manufacturer shall provide a detailed description of the procedure for resetting the HIAS.
         6.1.8.4. Alternatively, the manufacturer may choose to install an automatic system that either achieves both the tasks specified above or resets the HIAS. In this case, the manufacturer shall provide the test house with a description of the automatic system and, until such time as harmonized requirements have been developed, demonstrate the