The officers of the association must be a president, vice president, secretary, treasurer, and such other officers as may be created by the board of directors. An officer of the association shall perform the duties of the office as prescribed by law, the bylaws, or the board of directors. Any two or more offices may be held by the same individual except the offices of president and secretary. The president, vice president, secretary, and treasurer must be elected annually by the board of directors. Any office created by the board may be filled by appointment at any meeting of the board. Each elected officer holds office until that officer’s successor has been duly elected and qualified. Any officer elected or appointed may be removed by the board. The removal of any officer is without prejudice to any contractual rights of the officer. Election or appointment of an officer or agent does not create contractual rights. A vacancy in any office may be filled by the board of directors for the unexpired portion of the term.