Oregon Revised Statutes Corporations and Partnerships § 65.434

(1) Unless the articles provide otherwise, a corporation's board of directors may adopt one or more amendments to the corporation's articles without member approval:

(2) If a corporation has no members entitled to vote on articles, its incorporators, until directors have been chosen, and thereafter its board of directors, may adopt one or more amendments to the corporation's articles subject to any approval required pursuant to ORS 65.467. The corporation shall provide notice of any meeting at which an amendment is to be voted upon. The notice shall be in accordance with ORS 65.344 (2). The notice must also state that the purpose, or one of the purposes, of the meeting is to consider a proposed amendment to the articles and contain or be accompanied by a copy or summary of the amendment or state the general nature of the amendment. Unless the articles or bylaws require a greater vote or the board of directors requires a greater vote, the amendment must be approved by a majority of the directors in office at the time the amendment is adopted. Any number of amendments may be submitted and voted upon at any one meeting.