In which specific situations is it mandatory to have the rear fog light switched on?

Question

DentroTest · Accepted Answer

The rear fog light is a high-intensity light designed to make the vehicle visible in conditions of zero or near-zero visibility. Due to its brightness, it can dazzle drivers behind you if used incorrectly. Therefore, regulations are very strict: it must ONLY be turned on in especially unfavorable conditions, which are: thick fog, very heavy rain, strong snowfall, or dense clouds of dust or smoke. It is incorrect to use it simply when it rains or there is light fog (situations where you could use the front one), and it must be switched off immediately as soon as conditions improve to avoid dazzling other drivers.

In which specific situations is it mandatory to have the rear fog light switched on?

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