Article L2542-27 of the French General Code of Local Authorities
As an exception to the provisions of article L. 2223-17, on an exceptional basis, when a thirty-year, fifty-year, hundred-year or perpetual plot, granted before 11 November 1918 to persons who, on 22 January 1949, held German nationality and had left French territory, has ceased to be maintained, the mayor may record this state of neglect by means of a report made available to the public under the conditions laid down…