The Organising Committees for the Olympic Games (OCOGs) organise the Olympic Games.
The organisation of the Olympic Games is entrusted by the International Olympic Committee (IOC) to the National Olympic Committee (NOC) of the country of the host city as well as to the host city itself. The NOC forms, for that purpose, an OCOG which, from the time it is constituted, communicates directly with the IOC, from which it receives instructions.
The OCOG executive body includes: the IOC member or members in the country; the President and Secretary General of the NOC; and at least one member representing, and designated by, the host city. In addition, it generally includes representatives of the public authorities and other leading figures.
From the time of its constitution to the time it is dissolved, the OCOG must comply with the Olympic Charter, the contract entered into between the IOC, the National Olympic Committee and the host city (Host City Contract) and the instructions of the IOC Executive Board.
The Organising Committees grow from small organisations of tens of employees to reach several thousand only seven years later. The Organising Committee starts its work with a period of planning followed by a period of organisation which culminates in the implementation or operational phase at Games time.