The members of the Board of Adjustment shall be appointed by the Township Committee. The terms of the members first appointed under this chapter shall be so determined that to the greatest practicable extent, the expiration of such terms shall be distributed evenly over the first four years after their appointment. Thereafter, the term of each member shall be four years. No member may hold any elective office or position under the township. No member shall be permitted to act on any matter in which he has, either directly or indirectly, any personal or financial interest. A member may, after public hearing if he request it, be removed by the Township Committee for cause. A vacancy occurring otherwise than by expiration of a term shall be filled for the unexpired term only.