12. An easement may be acquired by the owner of the immoveable property for the beneficial enjoyment of which the right is created, or on his behalf, by any person in possession of the same.One of two or more co-owners of immoveable property may, as such, with or without the consent of the other or others, acquire an easement for the beneficial enjoyment of such property.No lessee of immoveable property can acquire, for the beneficial enjoyment of other immoveable property of his own, an easement in or over the property comprised in his lease.