The governing body of the association is the board. The board is responsible for the supervision, control and direction of the association. The board shall consist of the officers, the immediate past chair, and up to 15 at-large members of the board, referred to as “trustees,” with the intent of representing the diversity of schools within the membership. At all times a majority of the SAIS board shall be heads of member schools. However, board members may also include, but not be limited to, staff of educational associations, members of the educational community at large, member school trustees, and such other individuals who may fulfill the strategic needs of the association from time to time.