Oregon Revised Statutes Corporations and Partnerships § 65.331

(a) Except as otherwise provided in the articles or bylaws, the director may be removed with or without cause by the person appointing the director;

(b) The person removing the director shall do so by giving written notice of the removal to the director and either the presiding officer of the board or the corporation's president or secretary; and

(c) A removal is effective when the notice is effective under ORS 65.034 unless the notice specifies a future effective date.