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A 'Chairman-in-Office' or 'President-in-Office' ('CiO' or 'PiO'; French: ''président en exercice'') is the ambassador, foreign minister, or other official of the member state holding the presidency of an international organization, who is the individual actually chairing the meeting of the representatives from member states.

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See also

See also

★ Chairmanship of the Organization for Security and Co-operation in Europe

★ President-in-Office of the European Council