Document ID: chunk:federal_register_of_legislation:F2023C00919:body:0:p61
Version: federal_register_of_legislation:F2023C00919
Segment Type: other
Provision Reference: 
Character Range: 182368–185312

more than 1,500 mm (2,100 mm if the shape of the bodywork makes it impossible to keep within 1,500 mm and if the optional lamps are not installed). If the optional lamps are installed, they shall be placed at a height compatible with the applicable requirements of paragraph 6.10.4.1., the symmetry of the lamps, and at a vertical distance as large as the shape of the bodywork makes it possible, but not less than 600 mm above the mandatory lamps.
6.10.4.3.                    In length: The rear of the vehicle.
6.10.5.                          Geometric visibility
6.10.5.1.                    Horizontal angle: 45° inwards and 80° outwards.
However, where a lamp is mounted below 750 mm (measured according to the provisions of paragraph 5.8.1. above), the inward angle of 45° may be reduced to 20° under the H plane.
Vertical angle: 15° above and below the horizontal.
However,
             (a) Where a lamp is mounted below 750 mm (measured according to the provisions of paragraph 5.8.1. above), the downward angle of 15° may be reduced to 5°;
             (b) Where an optional lamp is mounted above 2,100 mm (measured according to the provisions of paragraph 5.8.1. above) the upward angle of 15° may be reduced to 5°.
6.10.5.2.                    For M1 and N1 category vehicles, as an alternative to paragraph 6.10.5.1. above, at the discretion of the manufacturer or his duly accredited representative, and only if a rear side-marker lamp is installed on the vehicle,
Horizontal angle: 45° outwards to 45° inwards. However, where a lamp is mounted below 750 mm (measured according to the provisions of paragraph 5.8.1. above), the inward angle of 45° may be reduced to 20° under the H plane.
Vertical angle: 15° above and below the horizontal.
However, where a lamp is mounted below 750 mm (measured according to the provisions of paragraph 5.8.1. above), the downward angle of 15° may be reduced to 5°.
To be considered visible, the lamp shall provide an unobstructed view of the apparent surface of at least 12.5 square centimetres. The illuminating surface area of any retro-reflector that does not transmit light shall be excluded.
6.10.6.                          Orientation
Rearwards.
6.10.7.                          Electrical connections
In accordance with paragraph 5.11.
However, if a rear position lamp is reciprocally incorporated with a direction-indicator, the electrical connection of the rear position lamp on the relevant side of the vehicle or the reciprocally incorporated part of it may be such that it is switched OFF during the entire period (both ON and OFF cycle) of activation of the direction-indicator lamp.
6.10.8.                          Tell-tale
Circuit-closed tell-tale mandatory. It shall be combined with that of the front position lamps.
This requirement does not apply when light signalling system operates according to paragraph 6.2.7.6.2.
However, a tell-tale indicating failure is mandatory