The qualification rounds for the four previous World Cups were very confusing, with controversial rules and many withdrawals. From this tournament onwards, FIFA decided to divide the teams into several continental zones, assign a pre-determined number of places in the final tournament to each zone, and delegate the organization of the qualifying tournaments to its confederations: UEFA of Europe, CONMEBOL of South America, NAFC of North America, CCCF of Central America and Caribbean, CAF of Africa and AFC of Asia (and OFC of Oceania after it was formed later). This led to a more organized qualification process with clearer rules, but not yet withdrawal-proof.