gender segregation permissive sex segregation Segregation which is explicitly permitted by law, i.e. affirmatively authorized, but not necessarily legally required or encouraged. Permissive sex segregation exempts certain things from anti-sex-discrimination laws, often allowing for, among others, segregation of religious and military schools, undergraduate schools that have traditionally admitted based on sex, health clubs, athletic teams, social fraternities and sororities, choirs and choruses, voluntary youth service organizations such as the Girl Scouts and Boy Scouts, father/son and mother/daughter activities, and sex-exclusive beauty pageants and scholarships.