What is the requirement regarding lights on a vehicle?

The requirement that all lights on a vehicle must be fixed is established to ensure the safety and functionality of the vehicle's lighting system. Fixed lights, such as headlights, tail lights, and turn signals, provide a reliable source of illumination and signaling that other drivers can expect and respond to appropriately. If lights were allowed to be movable, it could create confusion and increase the risk of accidents, as their positioning and visibility would not be consistent.

While some lights like turn signals may have specific functionalities that could involve motion (such as flashing), they are still considered fixed in their mounted position on the vehicle. This ensures that other road users can easily see and understand the driver's intentions. Thus, the requirement for all vehicle lights to be fixed enhances road safety and compliance with regulations.