(1) The co-owned thing also may be encumbered to the benefit of a co-owner.
(2) The encumbrance of a co-owned plot of land to the benefit of the respective owner of another plot of land and the encumbrance of another plot of land to the benefit of the respective owners of the co-owned plot of land are not excluded by reason of the other plot of land belonging to a co-owner of the co-owned plot of land.