(1) The articles of incorporation or the bylaws may be amended as provided in the bylaws. Amendments to the articles of incorporation or bylaws must be submitted, by certified mail, return receipt requested, to the department of administration, which shall approve or disapprove the amendments within 60 days.
(2) Amendments become effective upon:
(a) approval in writing by the department, for which a fee may not be charged; and
(b) in the case of articles of incorporation, filing with the secretary of state.
(3) If the department does not approve or disapprove the amendments within the 60-day period, the amendments must be considered approved, except that the department may extend the approval period for an additional 30 days for good cause as stated in a written notice given to the credit union within the original 60-day period.