To improve safety and conditions for children at Juvenile Hall, based on independent audit recommendations, shall supervisors establish an Advisory Board of Juvenile Hall to include: a Juvenile court judge, the District Attorney, Public Defender, Sheriff, health professionals, Probation employee organization members, previous Hall residents, and parents of persons incarcerated at Juvenile Hall AND shall the County Charter be amended to allow the County Excecutive to appoint, supervise, and remove the Chief Probation Officer?