The governing authority of each participating county shall establish a local advisory group which includes representation from each component of the local children's services systems and other interested parties. The advisory group shall appraise the council on the needs of children and youth in its community giving particular attention to the need for prevention programs and community based services, residential or nonresidential, which would provide an alternative to commitment to or placement or custody in the Department of Juvenile Justice or the Department of Human Resources and placement in a youth development center, foster home, or any other institution. Such appraisal shall be made annually and in writing. The governing authority of the county may request technical assistance from the council in conducting such study.