Bylaw increasing quorum or voting requirement for shareholders. (1) If expressly authorized by the articles of incorporation, the shareholders may adopt or amend a bylaw that fixes a greater quorum or voting requirement for shareholders, or voting groups of shareholders, than is required by this chapter. The adoption or amendment of a bylaw that adds, changes or deletes a greater quorum or voting requirement for shareholders must meet the same quorum requirement and be adopted by the same vote and voting groups required to take action under the quorum and voting requirement then in effect or the quorum and voting requirement proposed to be adopted, whichever is greater

ORS 60.464 — under Chapter 60.