Civil Code (Cap. 16), article 460

460. (1) An easement granted by one of the co-owners of an undivided tenement, shall not be deemed to be established until the other co-owners shall have also, jointly or separately, granted it. (2) Any grant made under any title whatsoever by one of the co-owners remains in abeyance until a like grant is made by all the others. (3) Nevertheless, any grant made by a co-owner, independently of the other co-owners, shall operate so as to restrain not only the grantor but also his successors, even if singular, or any person claiming under him, from obstructing the exercise of the right so granted. Where co-owner granting easement becomes sole owner of tenement.