205 ILCS 305/4
Amendments to the articles of incorporation or bylaws may be made by the members at any regular or special meeting, if the proposed amendment is set forth in the call for the meeting and is approved by a majority of the members present at a meeting at which a quorum is present. Amendments to the articles of incorporation or bylaws may also be made by the board of directors at any regular or special meeting, if the proposed amendment is set forth in the call of the meeting and approved by at least two thirds of the directors present at a meeting at which a quorum is present. A report shall be made to the members at the next annual meeting of any amendments to the articles of incorporation or bylaws adopted by the board of directors. Any amendment to the articles of incorporation or bylaws of a credit union shall be approved by the Secretary before the amendment is effective. The Secretary shall approve or disapprove of any amendments within 60 days after submission to him or her.
205 ILCS 305/4