Document ID: chunk:federal_register_of_legislation:F2023C00919:body:0:p40
Version: federal_register_of_legislation:F2023C00919
Segment Type: other
Provision Reference: 
Character Range: 124513–127703

6.1.7.1.              Except when they are used to give intermittent luminous warnings at short intervals the main-beam headlamps may be switched ON, only when the master light switch is in headlamps ON position or in "AUTO" (automatic) position and the conditions for automatic activation of dipped-beam exist. In the latter case, the main beam headlamps shall be switched off automatically when the conditions for automatic activation of dipped-beam ceased to exist.
6.1.7.2.              The control of the main-beam headlamps may be automatic regarding their activation and deactivation, the control signals being produced by a sensor system, which is capable of detecting and reacting to each of the following inputs:
(a) Ambient lighting conditions;
              (b) The light emitted by the front lighting devices and front light-signalling devices of oncoming vehicles;
              (c) The light emitted by the rear light-signalling devices of preceding vehicles.
Additional sensor functions to improve performance are allowed.
For the purpose of this paragraph, "vehicles" means vehicles of categories L, M, N, O, T, as well as bicycles, such vehicles being equipped with retro-reflectors, with lighting and light-signalling devices, which are switched ON.
6.1.7.3.              It shall always be possible to switch the main-beam headlamps  ON and OFF manually and to manually switch OFF the automatic control of the main-beam headlamps.
Moreover, the switching OFF, of the main-beam headlamps and of their automatic control, shall be by means of a simple               and immediate manual operation; the use of sub-menus is not allowed.
6.1.7.4.              The main-beam headlamps may be switched on either simultaneously or in pairs. In case, the extra two main-beam headlamps are installed, as permitted under paragraph 6.1.2. for vehicles of the category N3 only, no more than two pairs may be simultaneously lit. For changing over from the dipped to the main beam, at least one pair of main-beam headlamps shall be switched on. For changing over from the main-beam to the dipped-beam, all main-beam headlamps shall be switched off simultaneously.
6.1.7.5.              The dipped-beams may remain switched on at the same time as the main beams.
6.1.7.6.              Where four concealable headlamps are fitted their raised position shall prevent the simultaneous operation of any additional headlamps fitted, if these are intended to provide light signals consisting of intermittent illumination at short intervals (paragraph 5.12.) in daylight.
6.1.8.                              Tell-tale
Circuit-closed tell-tale mandatory.
6.1.8.1.                        If the control of the main-beam headlamps is automatic as described in paragraph 6.1.7.1. above an indication shall be provided to the driver that the automatic control of the main-beam function is activated. This information shall remain displayed as long as the automatic operation is activated.
6.1.9.                              Other requirements
6.1.9.1.                        The aggregate maximum intensity of the main beam headlamps which can be switched on simultaneously shall not exceed 430,000