The commission shall determine the policy and promulgate regulations governing the operation of the department and the employment of professional staff and personnel. The members of the commission shall receive subsistence, mileage, and per diem as may be provided by law for members of state boards, committees, and commissions. The commission shall appoint and in its discretion remove a South Carolina Director of Disabilities and Special Needs who is the chief executive officer of the department. The commission may appoint advisory committees it considers necessary to assist in the effective conduct of its responsibilities. The commission may educate the public and state and local officials as to the need for the funding, development, and coordination of services for persons with intellectual disability, related disabilities, head injuries, and spinal cord injuries and promote the best interest of persons with intellectual disability, related disabilities, head injuries, and spinal cord injuries. The commission is authorized to promulgate regulations to carry out the provisions of this chapter and other laws related to intellectual disability, related disabilities, head injuries, or spinal cord injuries. In promulgating these regulations, the commission must consult with the advisory committee of the division for which the regulations shall apply.