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Chair rotation

To decide which member nation gets to chair the G20 leaders' meeting for a given year, all members, except the European Union and African Union, are assigned to one of five different groupings, with all but one group having four members, the other having three. States from the same region are placed in the same group, except Group 1 and Group 2. All countries within a group are eligible to take over the G20 Presidency when it is their group's turn. Therefore, the states within the relevant group need to negotiate among themselves to select the next G20 President. Each year, a different G20 member country assumes the presidency starting from 1 December until 30 November. This system has been in place since 2010, when South Korea, which is in Group 5, held the G20 chair. The table below lists the nations' groupings:

To ensure continuity, the presidency is supported by a "troika" made up of the current, immediate past and next host countries.