Agency-supervised private family homes that provide alternative family living arrangement for older adults or adults with disabilities who need supervision and personal care (but generally not nursing care) and who do not live with their families. The arrangement provides an opportunity for the individual to become a participating member of the family and the community in which the family resides, and to share in the interaction and responsibilities of being a part of a family. Foster care for older adults and/or people with disabilities may not be available in all states; and some jurisdictions may permit the provision of rehabilitation services, nursing care and other medical services. Some adult foster homes may specialize in providing care for adults with developmental disabilities, Alzheimer's disease, mental health issues or other specific conditions. Licensing requirements vary considerably from area to area.