Article L2223-17 of the French General Code of Local Authorities
When, after a period of thirty years, a plot has ceased to be maintained, the mayor may declare this state of abandonment by means of a report brought to the attention of the public and the families. If, one year after this duly carried out publicity, the plot is still in a state of abandonment, the mayor has the option of referring the matter to the municipal council, which is…