Instead of the prudential committee required by law to be elected, the Academy and Graded School District, at its first annual meeting, shall elect three Trustees as follows: one for the term of one year, one for the term of two years, and one for the term of three years; and at all subsequent annual meetings, vacancies caused by the expiration of the term of office of Trustees shall be filled by the election of Trustees for the term of three years each; provided, however, that when the voters thereof so vote at any annual meeting, wherein the warning contains an appropriate article relating thereto, two additional Trustees may be elected thereat for a term of one year each. Such vote so taken shall remain in effect until such time as the voters of the Barton Academy and Graded School District rescind the same by a majority vote of the legal voters present and voting at an annual or special meeting duly warned and including such purpose. All vacancies caused by death, resignation, removal from the District, or other cause shall be filled at an annual or special meeting, warned for the purpose, for the unexpired term of such Trustees only; provided, however, that the Trustees may fill one vacancy occurring on the Board of Trustees or in any other office, during the year, until an election is had at the next annual meeting, or a special meeting called for that purpose. The Trustees shall have all the powers and perform all the duties of a prudential committee and board of school directors, or either, and shall choose one of their members to be President, and may appoint a Secretary of the Board; each of whom shall hold office for the term of one year and until their successors are chosen and appointed. The other officers of the Barton Academy and Graded School District shall be the same as now or may hereafter be provided for all school districts in the State; shall be elected in the same manner and be subject to the same duties and liabilities as now or hereafter prescribed by law.