The operation and management of any regional educational service center shall be the responsibility of the board of such center to be composed of at least one member from each participating board of education, selected by such board of education. The board of the regional educational service center may designate from its membership an executive board which shall have such powers as the board of the regional educational service center may delegate and which are consistent with this part. The term of office of members of the board of the regional educational service center shall not exceed four years. Members of the board of the regional educational service center shall receive no compensation for services rendered as such, but may be reimbursed for necessary expenses in the course of their duties. The director of the regional educational service center shall serve as the executive agent of the board of the regional educational service center.