Document ID: chunk:federal_register_of_legislation:F2023C00919:body:0:p84
Version: federal_register_of_legislation:F2023C00919
Segment Type: other
Provision Reference: 
Character Range: 247029–250332

switched off when the illuminance produced by ambient lighting conditions exceeds 7,000 lx.
Compliance with this requirement shall be demonstrated by the applicant, using simulation or other means of verification accepted by the Type Approval Authority. If necessary, the illuminance shall be measured on a horizontal surface, with a cosine corrected sensor on the same height as the mounting position of the sensor on the vehicle. This may be demonstrated by the manufacturer by sufficient documentation or by other means accepted by the Type Approval Authority.
6.22.9.4.                    The aggregate maximum intensity of the lighting units that can be energized simultaneously to provide the main-beam lighting or its modes, if any, shall not exceed 430,000 cd, which corresponds to a reference value of 100.
This maximum intensity shall be obtained by adding together the individual reference marks indicated on the several installation units that are simultaneously used to provide the main-beam.
6.22.9.5.                    The means according to the provisions of paragraph 5.8. of Regulation No 123, which allow the vehicle to be used temporarily in a territory with the opposite direction of driving than that for which approval is sought, shall be explained in detail in the owner's manual.
6.23.                                Emergency stop signal
6.23.1.                          Presence
Optional
The emergency stop signal shall be given by the simultaneous operation of all the stop or direction-indicator lamps fitted as described in paragraph 6.23.7.
6.23.2.                          Number
As specified in paragraph 6.5.2. or 6.7.2.
6.23.3.                          Arrangement
As specified in paragraph 6.5.3. or 6.7.3.
6.23.4.                          Position
As specified in paragraph 6.5.4. or 6.7.4.
6.23.5.                          Geometric visibility
As specified in paragraph 6.5.5. or 6.7.5.
6.23.6.                          Orientation
As specified in paragraph 6.5.6. or 6.7.6.
6.23.7.                          Electrical connections
6.23.7.1.                    All the lamps of the emergency stop signal shall flash in phase at a frequency of 4.0 ± 1.0 Hz.
6.23.7.1.1.              However, if any of the lamps of the emergency stop signal to the rear of the vehicle use filament light sources the frequency shall be 4.0 +0.0/-1.0 Hz.
6.23.7.2.                    The emergency stop signal shall operate independently of other lamps.
6.23.7.3.                    The emergency stop signal shall be activated and deactivated automatically.
6.23.7.3.1.              The emergency stop signal shall be activated only when the vehicle speed is above 50 km/h and the braking system is providing the emergency braking logic signal defined in Regulations Nos. 13 and 13-H.
6.23.7.3.2.              The emergency stop signal shall be automatically deactivated if the emergency braking logic signal as defined in Regulations Nos. 13 and 13-H is no longer provided or if the hazard warning signal is activated.
6.23.8.                          Tell tale
Optional
6.23.9.                          Other requirements
6.23.9.1.                    Except as provided in paragraph 6.23.9.2. below, if a motor vehicle is equipped to tow a trailer, the control of the emergency stop