(1) A person who has for twenty years peaceably and openly held possession of an immovable with an intention to own it, shall acquire the ownership by making registration thereof.
(2) A person, who has made registration as the owner of an immovable and has for ten years peaceably and openly held possession of an immovable with the intent to own it, shall acquire the ownership of such immovable if his possession is in good faith and without negligence.