When the supervisors of any district adopt an ordinance prescribing land use regulations, the supervisors shall provide by ordinance for the establishment of a board of adjustment to consist of three members, each to be appointed for a term of three years, except the members first appointed who are appointed for terms of one, two, and three years respectively. The members of each board of adjustment must be appointed by the committee with the advice and approval of the supervisors of the district for which the board has been established, and are removable, upon notice and hearing, for neglect of duty or malfeasance in office, but for no other reason. A hearing on the removal of a member of a board of adjustment must be conducted jointly by the committee and the supervisors. A vacancy on a board of adjustment must be filled in the same manner as the original appointment except the appointment is for the unexpired vacant term. Members of the committee and the supervisors of the district may not serve as members of the board of adjustment. The members of the board shall receive five dollars a day for the time spent on the work of the board in addition to their expenses, including traveling expenses necessarily incurred in the discharge of their duties. The supervisors shall pay the necessary administrative and other expenses of operation incurred by the board upon the certificate of the chairman of the board.