During the day, is a driver who is on the carriageway required to wear a reflective vest?

A)No, when visibility is good.
B)Yes, on all types of roads.
C)Yes, on interurban roads.Correct
Both during the day and at night, drivers of passenger cars, buses, goods transport vehicles, adaptable mixed vehicles and non-agricultural vehicle combinations, when they occupy the carriageway or hard shoulder on interurban roads, must wear an approved reflective vest. They are also required to put it on before getting out of the vehicle and not once they are already on the carriageway or hard shoulder.
Motorcycle riders are not required to use one, as their clothing must be of bright colours and made with retroreflective materials.