Article 1407 bis of the French General Tax Code
Municipalities other than those referred to in Article 232 may, by a deliberation taken under the conditions provided for in Article 1639 A bis, make dwellings that have been vacant for more than two years on 1st January of the tax year subject to council tax on second homes and other furnished premises not used as a main residence, for the municipal share and the share payable to public establishments…