The 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 by the expiration of the terms of office of Trustee shall be filled by the election of Trustees for the term of three years each; and all vacancies caused by death, registration, 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. The Trustees shall have all the powers and perform all the duties of a Prudential Committee of a school district, and shall choose one of their number 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. There shall also be elected a Collector, Treasurer, and three Auditors at each annual meeting of the District for the term of one year each, and vacancies in either of the offices may be filled at any special meeting called for that purpose, and they shall serve in their respective offices until their successors are elected. The President of the Board of Trustees shall serve as Moderator at all meetings of the District, and the Secretary of the Board of Trustees who shall not be a member of the Board shall serve as Clerk of the District and shall be invested with the same powers and subject to the same duties and liabilities of clerks of school districts under the school district system.