(a) If and to the extent necessary to accomplish the intended purpose of this subchapter to make available the broadest and most effective provision of mental retardation services to those in need of the services, the Board of Developmental Disabilities Services is authorized to contract for the providing of mental retardation services by other public agencies or private organizations.
(b) In this regard, the board is authorized to promulgate regulations and fix standards necessary to properly ensure that such mental retardation services are furnished in a proper and reasonable manner and on an economical basis.