A cooperative may amend its articles from time to time as may be desired, so long as its articles as amended contain only those provisions which might be lawfully contained in the original articles at the time of making the amendment, and, if a change in shares or the rights of shareholders or members, or an exchange, reclassification, or cancellation of shares or the rights of shareholders or members is to be made, those provisions necessary to effect the change, exchange, reclassification, or cancellation.