The Saudi government limits community schools to one per locality or city per nationality; diplomatic missions either supervise or directly operate the community schools. These community schools are not required to separate male and female students into separate campuses and are allowed to host social activities with men and women mixed. They are not required to have Saudi citizens as sponsors since the Saudi authorities consider the schools to be under the sponsorship of the diplomatic missions. Czarina Valerie A. Regis and Allan B. de Guzman, authors of "A system within a system: the Philippine schools overseas," wrote that the Saudi Ministry of Education "still exercises restraint in implementing its regulatory functions" on community schools.