The Mountain Law (Décret n° 2020-1264, October 16th, 2020) includes the obligation for the drivers to have winter equipment (snow or winter tires, or anti-slipping equipment like chains or snow socks) in areas defined by the Authorities, starting November 1st of each year, until the 31st of March of the following year.
The driver of the vehicle must have at least one of these equipments in some towns and cities, in a selection of French Departments.
The driver violating these regulations will incur a €135 fine, and a possible immobilization of the vehicle.