Document ID: chunk:federal_register_of_legislation:F2023C00919:body:0:p52
Version: federal_register_of_legislation:F2023C00919
Segment Type: other
Provision Reference: 
Character Range: 157736–160563

as evenly as practicable along each side are mandatory;
             (c) O3 and O4 three category 5 devices distributed as evenly as practicable along each side are mandatory.
These requirements do not apply if there are at least three amber side marker lamps that flash in phase and simultaneously with the direction indicator lamps on the same side of the vehicle.
6.5.4.                              Position
6.5.4.1.                        In width: the edge of the apparent surface in the direction of the reference axis farthest from the median longitudinal plane of the vehicle shall not be more than 400 mm from the extreme outer edge of the vehicle. This condition shall not apply to the optional rear lamps.
The distance between the inner edges of the two apparent surfaces in the direction of the reference axes shall not be less than 600 mm.
This distance may be reduced to 400 mm where the overall width of the vehicle is less than 1,300 mm.
6.5.4.2.                        In height: above the ground.
6.5.4.2.1.              The height of the light-emitting surface of the side direction-indicator lamps of categories 5 or 6 shall not be:
                  Less than: 350 mm for M1 and N1 category of vehicles, and 500 mm for all other categories of vehicles, both measured from the lowest point;               and
More than: 1,500 mm, measured from the highest point.
6.5.4.2.2.              The height of the direction-indicator lamps of categories 1, 1a, 1b, 2a and 2b, measured in accordance with paragraph 5.8., shall not be less than 350 mm and not more than 1,500 mm.
6.5.4.2.3.              If the structure of the vehicle does not permit these upper limits, measured as specified above, to be respected, and if the optional rear lamps are not installed, they may be increased to 2,300 mm for side direction-indicator lamps of categories 5 and 6, and to 2,100 mm for the direction-indicator lamps of categories 1, 1a, 1b, 2a and 2b.
6.5.4.2.4.              If optional rear lamps are installed, they shall be placed at a height compatible with the applicable requirements of paragraph 6.5.4.1., 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.
6.5.4.3.                        In length (see figure below)
The distance between the light emitting surface of the side direction-indicator lamp (categories 5 and 6) and the transverse plane which marks the forward boundary of the vehicle's overall length, shall not exceed 1,800 mm.
However, this distance shall not exceed 2,500 mm:
(a) For M1 and N1 category vehicles;
             (b) For all other categories of vehicles if the structure of the vehicle makes it impossible to comply with the minimum angles of visibility.
Optional category 5