Regarding vehicle lights, which statement is true?

The statement that no red light may be on the front of a vehicle is accurate because, in most jurisdictions, red lights are designated for the rear of the vehicle to indicate braking or for tail lights. This regulation is critical for ensuring that other drivers can clearly identify whether a vehicle is slowing down or stopping, thereby maintaining safety on the road.

Without this distinction, confusion could arise if red lights were present on the front, leading to potential accidents as other drivers would not be able to interpret the vehicle's intentions accurately. This clarity is important in maintaining the intended signaling system of vehicle lights, which prioritizes safety and effective communication among road users.

The other options may involve specific cases or exceptions, such as emergency vehicles or unique vehicle functions, but they do not align with the standard regulations governing vehicle light placement for general safety.