Oregon Revised Statutes Corporations and Partnerships § 63.265

(2)(a) Except as otherwise provided in paragraph (b) of this subsection, following the cessation of the member's interest, the holder of the former member's interest shall be considered an assignee of such interest and shall have all the rights, duties and obligations of an assignee under this chapter.

(b) If the member who ceases to be a member is the only member of the limited liability company, the holder of the former member's interest shall become a member simultaneously with and upon the cessation of the former member's interest.