Idaho Code § 22-2609

The articles of incorporation may be altered or amended in any respect, including increases or decreases in capital stock, at any regular meeting or at any special meeting called for that purpose. An amendment must first be approved by two-thirds (2/3) of the directors and then adopted by the affirmative vote of two-thirds (2/3) of the members or stockholders of the association present at such meeting, except as otherwise provided in section 22-2608[, Idaho Code], and provided that a quorum as specified in the by-laws of the association be present. Amendments of the articles of incorporation, when so adopted shall be filed in accordance with the provisions of the general corporation law of this state.