The HCS School Board appoints committees. Such other regular, special or ad hoc committees may be formed as the Board deems necessary or proper. The Development, Education, and Facilities and Equipment Committees may have additional association or non-association members who volunteer to participate in committee functions as non-voting members. Insofar as is practical, a member of the Board shall be appointed chairman/chairwoman of each committee. The Board Chairman, Administrator, and school principals shall be ex officio members of every committee. Vacancies in the membership of any committee may be filled by appointments made in the same manner as provided in the case of the original appointment.