Document ID: chunk:federal_register_of_legislation:F2023C00919:body:0:p7
Version: federal_register_of_legislation:F2023C00919
Segment Type: other
Provision Reference: 
Character Range: 28444–31607

of this standard are deemed to comply.
9.2.3.                              Arrangement:
(A) 2 at the rear
(B) 2 at the front plus (A)
(C) (B) plus one each side, midway between the front and the rear lamps.
9.2.3.1.                        Additional pairs of lamps, equally spaced between the front and the rear lamps, are permitted, provided that the distances between the centres of adjacent lamps is not more than 5 metres.
9.2.3.2.                        Arrangement A applies to motor vehicles with a "Total Length' over 7.5 metres.  And to trailers with an 'Overall Width' over 2.1 metres.
9.2.3.3.                        Arrangement B applies to 'Semi-trailers' with a 'Total Length' equal to or less than 7.5 metres.
9.2.3.4.                        Arrangement C must apply to trailers (including 'semi trailers') with a 'Total Length' over 7.5 metres.
9.2.4.                              Position:
9.2.4.1.                        In width: that point on the illuminating surface which is farthest from the vehicle's median longitudinal plane must not be more than 150 mm from the extreme outer edge of the vehicle.
9.2.4.2.                        In height: at the same height as far as practicable above the ground not less than 600 mm nor more than 1,500 mm (2,100 mm if the shape of the body-work makes it impossible to keep within 1,500 mm.)
9.2.4.3.                        In length: According to the arrangement of clause 9.2.3.
That point on the illuminating surface which is farthest from the vehicle's median longitudinal plane must:
9.2.4.3.1.                  in the case of rear lamps, not be more than 300 mm from the rear of the side of the vehicle on which the lamp is mounted.
9.2.4.3.2.                  In the case of front lamps mounted on trailers, not be more than 300 mm from the front of the side of the vehicle on which the lamp is mounted.
9.2.4.3.3.                  In the case of front lamps mounted on motor vehicles, be within the front third of the vehicle's length but not forward of a vertical transverse plane through the rear most point of the driver's 'Seat' when in its rearmost normal driving position.
9.2.4.3.4.                  Where it would be reasonably impracticable for constructional reasons to comply with the requirements of clauses 9.2.4.3.1 and/or 9.2.4.3.2 and 9.2.4.3.3, be as close as possible to the front and/or rear respectively, provided that where the distance between the front and rear lamps would then be less than 2.5 metres, only the rearmost pair of lamps need be fitted.
9.2.5.                              Geometric visibility:
Horizontal angle: from 5°, if the height of the lamp is less than 750 mm.
9.2.6.                              Orientation: Outwards
9.2.7.                              Electrical connections: No specific requirement.
9.2.8.                              Tell-tale: Optional.  If it exists, its function must be carried out by the tell-tale required for the front and rear position lamps.
9.2.9.                              Other requirements: None
9.3.                                    DRIVING LAMPS
9.3.1.                              Presence: Optional on