Must trailers and semi-trailers have a technical inspection card?

Must trailers and semi-trailers have a technical inspection card?
A)No, the one belonging to the towing vehicle is sufficient.
B)Yes, but only non-light ones.
C)Yes, all of them.Correct
The technical inspection card (ITV card) certifies that the vehicle meets its essential technical characteristics and its fitness to travel on public roads.
This document is issued by the competent authorities responsible for the technical inspection of vehicles. All motor vehicles, trailers and semi-trailers must be provided with it.
The vehicle registration certificate is mandatory for automobiles and trailers and semi-trailers with a maximum authorised mass exceeding 750 kg.