Part 2 specifies the actual services that should be provided in particular settings. It details the core components of psychiatric services, such as screening, evaluation, treatment, and discharge planning. Part 3 applies the principles and guidelines set forth in the first two parts to particular patient populations. It elaborates on services that should be provided to meet the needs of particular groups of inmates. These groups include inmates with substance use disorders, inmates with comorbid disorders, women inmates, youth in adult correctional facilities, the geriatric inmate population, the terminally ill inmate population, and inmates with mental retardation and developmental disabilities.