Document ID: chunk:federal_register_of_legislation:F2023C00133:body:0:p13
Version: federal_register_of_legislation:F2023C00133
Segment Type: other
Provision Reference: 
Character Range: 39316–42561

than 1200 mm above the ground;
7.3.3.3.                        in length:
7.3.3.3.1.                  the distance between the 'Light Emitting Surface' of the side 'Direction Indicator Lamp' (category 5) and the transverse plane which marks the forward boundary of the vehicle's overall length, shall not exceed 1800 mm. If the structure of the vehicle makes it impossible to comply with the minimum angles of visibility, this distance may be increased to 2500 mm.
7.3.4.                              Geometric Visibility:
7.3.4.1.                        Horizontal angles: see Figure 1 below.
7.3.4.2.                        Vertical angles: 15° above and below the horizontal. The vertical angle below the horizontal may be reduced to 5°, however, if the height of the lamps is less than 750 mm.
7.3.4.3.                        The front lights shall not be seen at the rear and the rear lights at the front, in the regions shown in zones 1 and 2 respectively (see clauses 6.11. and 6.12.).
7.3.5.                              Orientation: According to the fitting arrangement (see Figure 1 below).
7.3.5.1.                        for LB1 and LE1 vehicles the front 'Direction Indicator Lamps' may move with the steering.
7.3.5.2.                        for LB2 and LE2 vehicles, the front 'Direction Indicator Lamps' shall not move with the steering.
7.3.6.                              May be grouped with one or more lamps.
7.3.7.                              May not be 'Combined' with any other lamp.
7.3.8.                              May be 'Reciprocally Incorporated' with a 'Parking Lamp' only.
7.3.9.                              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.
7.3.10.                          Tell-tale: 'Operating Tell-tale' mandatory.  It shall be a flashing green or yellow lamp, visible in all normal driving conditions which, in the event of defective operation of any of the direction indicators, is extinguished, remains alight without flashing, or shows a marked change of frequency.
7.3.11.                          Other Requirements: The characteristics indicated below shall be measured with no other load on the electrical system than that required for the operation of the engine and the lighting devices.
7.3.11.1.                    In the case of all vehicles which supply direct current to the direction indicators:
7.3.11.1.1.              the light flashing frequency shall be 90 ±30 times per minute;
7.3.11.1.2.              the flashing of the direction indicators on the same side of the vehicle shall occur synchronously and in phase;
7.3.11.1.3.              operation of the light-signal control shall be followed within not more than one second by the appearance of the light and within not more than one-and-one-half seconds by the first extinction of the light.
7.3.11.2.                    In the case of a vehicle which supplies alternating current to the direction indicators:
7.3.11.2.1.              where the speed of the engine is between 50 per cent and 100 per cent of the engine speed