Where state statute permits more and more school districts are requiring employees to reside within the school district. Residency requirements have been upheld by the majority of state and federal courts when there is a rational basis for the requirements. For example a residency requirement for all future district employees of the Pittsburgh school district withstood challenge by the Pittsburgh Federation of Teachers because the court agreed that the district's stated reasons for the requirement-namely that employees would have an increased personal knowledge of conditions in the district would feel a greater personal stake in the district would pay taxes in the district and would have reduced absenteeism and tardiness-were all rational legitimate and justifiable