A-tsooni kuuluvad riigid, mis on Majandusliku Koostöö ja Arengu Organisatsiooni (OECD) täisliikmed, ja riigid, mis on sõlminud Rahvusvahelise Valuutafondiga (IMF) spetsiaalsed laenulepingud IMF-i Üldiste Laenukokkulepete (GAB _ General Agreements to Borrow) alusel.
"Zone A" shall comprise all the Member States and all other countries which are full members of the Organisation for Economic Cooperation and Development (OECD) and those countries which have concluded special lending arrangements with the International Monetary Fund (IMF) associated with the Fund's general arrangements to borrow (GAB). Any country which reschedules its external sovereign debt is, however, precluded from Zone A for a period of five years.