Oregon Revised Statutes Corporations and Partnerships § 67.600

(a) Renders professional service; or

(b) Is affiliated with a limited liability partnership or a foreign limited liability partnership that renders professional service and renders services related to or complementary to the professional service rendered by, or provides services or facilities to, the limited liability partnership or foreign limited liability partnership that renders professional service.

(a) At least a majority of partners in one partnership are partners in the other partnership;

(b) At least a majority of the partners in each partnership also are partners or hold interest in another person and each partnership renders services pursuant to an agreement with such other person; or

(c) One partnership directly or indirectly through one or more intermediaries controls, is controlled by or is under common control with the other partnership.

(a) The vote of the partners necessary to amend the partnership agreement; or

(b) In the case of a partnership agreement that includes provisions that expressly address the obligations of partners to make contributions to cover partnership losses, the vote of the partners necessary to amend such provisions.