Article R2223-12 of the French General Code of Local Authorities
In accordance with article L. 2223-17, a perpetual plot may not be deemed to be in a state of abandonment before the expiry of a period of thirty years from the date of the plot deed. The procedure provided for in the articles L. 2223-4, R. 2223-13 to R. 2223-21 can only be engaged ten years after the last burial made in the conceded plot.