Article 595 of the French Civil Code
The usufructuary may enjoy by himself, lease to another, even sell or transfer his right free of charge. Leases which the usufructuary alone has made for a period which exceeds nine years are, in the event of cessation of the usufruct, obligatory with regard to the bare owner only for the time which remains to run, either of the first nine-year period, if the parties are still in it, or…