Document ID: chunk:federal_register_of_legislation:F2023C00919:body:0:p54
Version: federal_register_of_legislation:F2023C00919
Segment Type: other
Provision Reference: 
Character Range: 162815–165834

of at least 12.5 square centimetres, except for side direction-indicators of categories 5 and 6. The illuminating surface area of any retro-reflector that does not transmit light shall be excluded.
6.5.6.                              Orientation
According to the specifications for installation by the manufacturer, if any.
6.5.7.                              Electrical connections
Direction-indicator lamps shall switch on independently of the other lamps. All direction-indicator lamps on one side of a vehicle shall be switched on and off by means of one control and shall flash in phase.
On M1 and N1 vehicles less than 6 m in length, with an arrangement complying with paragraph 6.5.5.2. above, the amber side-marker lamps, when mounted, shall also flash at the same frequency (in phase) with the direction-indicator lamps.
6.5.8.                              Tell-tale
Operating tell-tale mandatory for direction-indicator lamps of categories 1, 1a, 1b, 2a and 2b.  It may be visual or auditory or both.  If it is visual, it shall be a flashing light which, at least in the event of the malfunction of any of these direction-indicator lamps, is either extinguished, or remains alight without flashing, or shows a marked change of frequency.  If it is entirely auditory it shall be clearly audible and shall show a marked change of frequency, at least in the event of the malfunction of any of these direction-indicator lamps.
It shall be activated by the signal produced according to paragraph 6.2.2. of Regulation No. 6 or another suitable way13.
If a motor vehicle is equipped to draw a trailer, it shall be fitted with a special visual operational tell-tale for the direction-indicator lamps on the trailer unless the tell-tale of the drawing vehicle allows the failure of any one of the direction-indicator lamps on the vehicle combination thus formed to be detected.
For the optional direction-indicator lamps on motor vehicles and trailers, operating tell-tale shall not be mandatory.
6.5.9.                              Other requirements
The light shall be a flashing light flashing 90 ± 30 times per minute.
Operation of the light signal control shall be followed within not more than one second by the emission of light and within not more than one and one half seconds by its first extinction. If a motor vehicle is equipped to draw a trailer, the control of the direction-indicator lamps on the drawing vehicle shall also operate the indicator lamps of the trailer. In the event of failure, other than short circuit, of one direction-indicator lamp, the others shall continue to flash, but the frequency in this condition may be different from that prescribed.
6.6.                                    Hazard warning signal
6.6.1.                              Presence
Mandatory.
The signal shall be given by simultaneous operation of the direction-indicator lamps in accordance with the requirements of paragraph 6.5. above.
6.6.2.                              Number
As specified in paragraph 6.5.2.