“Handicapped” means a family in which the head of the household is suffering from an orthopedic disability impairing personal mobility or a physical disability affecting his or her ability to obtain employment or a single person with such a physical disability, where the family or person requires special care or facilities in the home. “Handicapped” also includes a family in which the head of household suffers from a developmental disability specified in subdivision (a) of Section 38010 or a mental disorder which would render him or her eligible to participate in programs of rehabilitation or social services conducted by or on behalf of a public agency, or a single person with such a developmental disability or mental disorder. “Handicapped” also includes an elderly or handicapped household, as defined in Section 19903 and subject to Part 4.5 (commencing with Section 19902) of Division 13.