Oregon Revised Statutes Corporations and Partnerships § 58.156

(a) Require a person employed by a professional corporation to be licensed to perform services for such corporation if a license is not otherwise required;

(b) Prohibit a licensed person from rendering professional service or services in the person's individual capacity although the person is a shareholder, director, officer, employee or agent of a domestic or foreign professional corporation; or

(c) Prohibit a person licensed in another state from rendering professional service or services for a domestic or foreign professional corporation in this state if not prohibited by the applicable regulatory board.