Anyone who drives an electric scooter and is over 18 years old is not obliged to use a helmet. At least until the Highway Code says otherwise. But it is certainly not a mayor who can impose on an adult the protection in the head to circulate in the city by this means.
In a nutshell, this is the content of the ruling [1] with which the TAR of Florence deemed illegitimate the order of the first citizen of the Tuscan capital, Dario Nardella, who had imposed on electric scooter drivers to wear helme