Section 170: Estoppel of tenant; and of licensee of person in possession.

No tenant of immovable property or person claiming through such tenant, shall, during the continuance of the tenancy, be permitted to deny that the landlord of such tenant had at the beginning of the tenancy a title to such immovable property; and no person who came upon any immovable property by the licence of the person in possession of it shall be permitted to deny that such person had a title to such possession at the time when such licence was given.