The role of identity documentation is primarily played by the so-called Russian internal passport, a passport-size booklet which contains a person's photograph, birth information and other data such as registration at the place of residence (informally known as propiska), marital data, information about military service and underage children. Internal passports are issued by the Main Directorate for Migration Affairs to all citizens who reach their 14th birthday and do not reside outside Russia. They are re-issued at the age 20 and 45.