Light drizzle is falling on the road near Reestdal; visibility stays well above 200 metres. Are you required to switch on your front fog light?
No, the front fog light may only be used in heavy rain that seriously impairs visibility
Yes, in any rain the front fog light is mandatory, just like dipped beam
Explanation
False — trap: 'may' read as 'must'. Only dipped beam is always mandatory in rain; the front fog light may only be used in heavy rain with seriously impaired visibility (Book p.187).