(1) supervise the administration of those services included in the program which are not administered directly by it;
(2) provide such methods of administration, including those necessary to establish and maintain a merit system of personnel administration, as are necessary for the efficient operation of the plan;
(3) extend and improve any such services;
(4) cooperate with medical, health, nursing, and welfare groups and organizations, and with any agency of the Federal Government charged with the administration of laws providing for vocational rehabilitation of physically handicapped children;
(5) cooperate with the Federal Government, through its appropriate agency or instrumentality, in developing, extending, and improving such services; and
(6) receive and expend all funds made available to the Department by the Federal Government, the government of the Virgin Islands or its political subdivisions, or from other sources, for such purposes.