Mandatory for vehicles over 3.5 tons in France since January 1, 2021. This applies regardless of whether it is a truck, van, or motorhome. All vehicles exceeding this weight limit must now display the blind spot sticker in three specified locations on the vehicle. The law makes no distinction between domestic and foreign vehicles. The aim is to protect cyclists and pedestrians in the blind spot. Motorhome drivers should use the stickers with the bus. Below are the instructions for how to apply them to the vehicle: Vehicle front: vertically at a height between 0.9 and 1.5 meters, horizontally within the first meter from the front of the vehicle. Vehicle rear: vertically at a height between 0.9 and 1.5 meters, horizontally on the right side of the vehicle.