juveniles must be assigned to intensive probation or aftercare services by the Department of Juvenile Justice. Juveniles assigned to these intensive supervision services must be those juveniles who require enhanced supervision, monitoring and contacts, or a higher level of treatment services. Intensive supervision must be provided by the department in all regions of the State. In conjunction with establishing these intensive supervision services, the department shall develop an array of graduated sanctions and impose these sanctions on offenders being provided intensive supervision services for technical rule violations and minor infractions, whenever feasible to do so, in lieu of re-incarceration of the juvenile in a secure correctional facility. The array of graduated sanctions developed by the department may include, as a condition of probation or parole, placement of a juvenile in a staff or environmentally secure residential program. Case workers selected to monitor, supervise, and serve juveniles assigned to intensive supervision services shall have caseloads of no more than twenty juveniles.