The highest level is the zone, which is largely continent-based: Zone 1 is North America Zone 2 is Europe, Former Soviet Union countries, and Israel Zone 3 is Australasia Zone 4 is Latin America (except Puerto Rico) Zone 5 was Africa Zone 6 was Asia, Israel and the Asian parts of Russia, (which are listed in Zone 2).
Najveći nivo je zona, koja je uglavnom zasnovana na kontinentu: Zona 1 je Severna Amerika Zona 2 je Evropa, zemlje bivšeg Sovjetskog Saveza i Izrael Zona 3 je Australazija Zona 4 je Latinska Amerika (osim Portoriko) Zona 5 je Afrika Zona 6 je Azija, Izrael i azijski delovi Rusije, (koje su navedene u zoni 2).