Officials who work for the North Atlantic Treaty Organization require a NATO visa. The NATO-1 visa is issued to permanent representatives of NATO and their staff members, NATO-2 visa is issued to a representative of member state to NATO or its subsidiary bodies, advisor or technical expert of the NATO delegation visiting the United States, a member of the NATO military forces component or a staff member of the NATO representative, NATO-3 visa is issued to official clerical staff accompanying the representative of a NATO member state, NATO-4 visa is issued to foreign national recognized as a NATO official, NATO-5 visa is issued to a foreign national recognized as a NATO expert and NATO-6 visa is issued to a member of the civilian component of the NATO. All NATO visas are issued to immediate family members as well. NATO-7 visas are issued to personal employees or domestic workers of a NATO-1 – NATO-6 visa holders.