The business of the Board shall be conducted at public meetings, following due notice to the public in accordance with Iowa law. Said meetings shall be conducted at the call of the chairperson and at such other times as the Board may determine. Such chairperson, or in the absence of the chairperson, the acting chairperson, may administer oaths and compel the attendance of witnesses. The Board shall keep minutes of its proceedings, showing the vote of each member upon each question, or if absent or failing to vote, indicating such fact, and shall keep records of its examinations and other official actions, all of which shall be immediately filed in the office of the Board and shall be a public record. Decisions of the Board shall be by concurring vote of three or more members of the Board. The Board shall adopt, and may from time to time amend, bylaws governing its conduct of meetings, provided such bylaws shall be in accordance with the provisions of this chapter and the provisions of Chapter 414 of the Code of Iowa.