If a light quadricycle has a self-protection structure and seat belts, is it compulsory to wear a helmet?

If a light quadricycle has a self-protection structure and seat belts, is it compulsory to wear a helmet?
A)Yes, but only on urban roads.
B)Yes, but only outside built-up areas.
C)No, if this is stated in the technical inspection card.Correct
When light quadricycles have a self-protection structure and are fitted with seat belts, and this is stated in the corresponding technical inspection card or in the moped's certificate of characteristics, their drivers and passengers are exempt from using a protective helmet, and are instead required in that case to use the seat belt.