Iowa Code § 499.46
The directors, by a vote of seventy-five percent of the directors, may adopt, alter, amend, or repeal bylaws for the association, which shall remain in force until altered, amended, or repealed by a vote of seventy-five percent of the members present or represented having voting privileges, at any annual meeting or special meeting of the membership, provided that at least ten days' prior written notice of the impending membership vote has been mailed to all members of the association with a copy or summary of the proposed adoption, alteration, amendment, or repeal of the bylaws. Proposals by members to adopt, alter, amend, or repeal bylaws by vote of the membership shall be presented to the association's registered office for mailing to the membership by the association at least twenty days prior to the meeting at which the proposed change is to be considered. Bylaws shall be kept by the secretary subject to inspection by any member at any time. Bylaws may deal with the fiscal or internal affairs of the association or any subject of this chapter in any manner not inconsistent with this chapter or the articles.
Iowa Code § 499.46
96 Acts, ch 1115, §3