A Board of Adjustment is hereby created. Such Board of Adjustment shall consist of five (5) members appointed by the Board of Supervisors for staggered terms of five (5) years and vacancies shall be filled for the unexpired term of any member whose term becomes vacant. The Board of Supervisors shall have power to remove any member of the Board of Adjustment for cause upon written charges and after public hearing. The Board of Adjustment shall organize and adopt rules in accordance with provisions of the Zoning Ordinance and the Code of Iowa. All meetings of the Board of Adjustment shall be held at the call of the Chairperson and at such time and place within the County as the Board of Adjustment may determine. Such Chairperson, or in the Chairperson’s absence, the acting chairperson, may administer oaths and compel the attendance of witnesses. All meetings of the Board of Adjustment shall be open to the public. The Board of Adjustment shall keep complete records of its hearings and other official actions. Every rule, regulation, every amendment or repeal thereof and every order, requirement or decision of the Board of Adjustment shall immediately be filed in the office of the Board of Adjustment and shall be a public record. The presence of three (3) members shall be necessary to constitute a quorum.