The primary responsibility of the Chair-in-Office is to host the CHOGM , but their roles can be expanded . For example , after the 2002 CHOGM , the incumbent , previous , and next Chairmen-in-Office formed a troika in an attempt to resolve the ongoing dispute over Zimbabwe 's membership of the Commonwealth
2002 CHOGM
Commonwealth Heads of Government Meeting 2002
Commonwealth Chair-in-Office