Developing country members pay 30% of the regular rate across the board (no tiering for countries other than developing or not.

Countries eligible for membership discount are:

         
AfghanistanCongo, Rep.IraqMoroccoSt. Vincent and the Grenadines
AlbaniaCosta RicaJamaicaMozambiqueSudan
AlgeriaCôte d'IvoireJordanMyanmarSuriname
American SamoaCubaKazakhstanNamibiaSwaziland
AngolaDjiboutiKenyaNauruSyrian Arab Republic
ArmeniaDominicaKiribatiNepalTajikistan
AzerbaijanDominican RepublicKorea, Dem. People's Rep.NicaraguaTanzania
BangladeshEcuadorKosovoNigerThailand
BelarusEgypt, Arab Rep.Kyrgyz RepublicNigeriaTimor-Leste
BelizeEl SalvadorLao PDRPakistanTogo
BeninEquatorial GuineaLebanonPapua New GuineaTonga
BhutanEritreaLesothoParaguayTunisia
BoliviaEthiopiaLiberiaPeruTurkey
Bosnia and HerzegovinaFijiLibyaPhilippinesTurkmenistan
BotswanaGabonMacedonia, FYRRomaniaTuvalu
BrazilGambia, TheMadagascarRussian FederationUganda
BulgariaGeorgiaMalawiRwandaUkraine
Burkina FasoGhanaMalaysiaSamoaUzbekistan
BurundiGrenadaMaldivesSão Tomé and PrincipeVanuatu
Cabo VerdeGuatemalaMaliSenegalVenezuela, RB
CambodiaGuineaMarshall IslandsSerbiaVietnam
CameroonGuinea-BissauMauritaniaSierra LeoneWest Bank and Gaza
Central African RepublicGuyanaMauritiusSolomon IslandsYemen, Rep.
ChadHaitiMexicoSomaliaZambia
ChinaHondurasMicronesia, Fed. Sts.South AfricaZimbabwe
ColombiaIndiaMoldovaSouth Sudan
ComorosIndonesiaMongoliaSri Lanka
Congo, Dem. Rep.Iran, Islamic Rep.MontenegroSt. Lucia