Document ID: chunk:federal_register_of_legislation:F2023C00919:body:0:p74
Version: federal_register_of_legislation:F2023C00919
Segment Type: other
Provision Reference: 
Character Range: 219222–222369

and the cab of chassis-cabs.
Partial or full contour marking may be applied instead of mandatory line markings, and full contour marking may be applied instead of mandatory partial contour marking.
6.21.1.3.2.              To the front:
Line marking on vehicles of categories O2, O3 and O4.
Partial or full contour marking may not be applied to the front.
6.21.2.                          Number
According to the presence.
6.21.3.                          Arrangement
The conspicuity markings shall be as close as practicable to horizontal and vertical, compatible with the shape, structure, design and operational requirements of the vehicle; if this is not possible, the full or partial contour markings, when fitted, shall follow as close as practicable the contour of the outer shape of the vehicle.
Furthermore, the conspicuity markings shall be spaced as evenly as possible over the horizontal dimensions of the vehicle such that the total length and/or width of the vehicle can be identified.
6.21.4.                          Position
6.21.4.1.                    Width
6.21.4.1.1.              The conspicuity marking shall be as close as practicable to the edge of the vehicle.
6.21.4.1.2.              The cumulative horizontal length of the conspicuity marking elements, as mounted on the vehicle, shall equate to at least 70 per cent of the overall width of the vehicle, excluding any horizontal overlap of individual elements.
6.21.4.2.                    Length
6.21.4.2.1.              The conspicuity marking shall be as close as practicable to the ends of the               vehicle and reach to within 600 mm of each end of the vehicle.
         6.21.4.2.1.1.               For motor vehicles each end of the vehicle or in the case of tractors for semi-trailers each end of the cab;
         However, an alternative marking mode within 2,400 mm from the front end of the motor vehicle is allowed where a series of retro-reflectors of Class IVA of Regulation No. 3 or Class C of Regulation No. 104 are mounted followed by the required conspicuity marking as follows:
         (a) Retro-reflector size minimum 25 cm2;
             (b) One retro-reflector mounted not more than 600 mm from the front end of the vehicle;
         (c) Additional retro-reflectors spaced not more than 600 mm apart;
             (d)              The distance between the last retro-reflector and the start of the conspicuity marking shall not exceed 600 mm;
         6.21.4.2.1.2.               For trailers, each end of the vehicle (excluding the drawbar).
6.21.4.2.2.               The cumulative horizontal length of the conspicuity marking elements, as               mounted on the vehicle, excluding any horizontal overlap of individual               elements, shall equate to at least 70 per cent of:
         6.21.4.2.2.1.               For motor vehicles, length of vehicle, or in the case of tractors for semi-trailers, if fitted, the length of the cab; however, when using the alternative marking mode per paragraph 6.21.4.2.1.1., the distance beginning within 2,400 mm from the front end of vehicle to its rear end.
         A is the distance