(1) After the filing of a limited liability company's original articles of organization, one or more persons may be admitted as an additional member or members upon the consent of all members.
(2) At any time that a limited liability company has no members, upon the unanimous consent of all the persons holding by assignment or transfer any of the membership interest of the last remaining member of the limited liability company, one or more persons, including an assignee or transferee of the last remaining member, may be admitted as a member or members.