In September 2007, the rotation system came under review, and a new system was proposed which renders ineligible for bidding only the last two World Cup host confederations. This proposal was adopted on 29 October 2007, in Zürich, Switzerland by FIFA's Executive Committee. Under this policy, a 2018 bid could have come from North America, Asia, Europe, or Oceania, as Africa and South America are ineligible. Likewise, no CONMEBOL member could have made a 2022 bid, and candidates from the same confederation as the successful 2018 applicant will be disregarded in the 2022 selection procedure.
After the United States, the last non-European candidate in the 2018 bidding cycle, withdrew its bid for that year, it now means that the 2018 tournament will be held in Europe. This in turn means that South America and Europe will be ineligible for 2022.
— Cancelled Bids —