The executive director may appoint local or industry advisory councils, composed in each case of equal numbers of employer representatives and employee representatives, who may fairly be regarded as representatives because of their vocation, employment or affiliations, and of members representing the general public as the executive director designates. Local councils shall aid the department in formulating a policy and discussing problems relating to the administration of Chapters 27 through 41 of this title, and in assuring impartiality and freedom from political influence in the solution of those problems. Members of local advisory councils must serve without compensation, must receive per diem, mileage, and subsistence as provided by law for members of boards, commissions, and committees.