An office worker has had a record of frequent absence. He has used all his vacation and sick-leave days, and has frequently requested additional leave without pay. His supervisor and co-workers have expressed great frustration because his absenteeism has caused bottlenecks in paperwork, created low morale in the office, and required others to do his work in addition to their own. However, the individual believes he is entitled to take his earned time and additional time off without pay. Is he right?