Intergovernmental Panel on Climate Change
The IPCC Panel is made of people from governments and other groups.  Scientific experts are preferred. Meetings of the IPCC and IPCC Working Groups are held by members of governments. Non-Governmental and Intergovernmenta Organizations may be allowed to attend as observers. Meetings of the IPCC Bureau, workshops, experts and lead authors are by invitation only. 350 government officials and climate change experts visited the 2003 meeting. The meeting report  says there were 322 persons in attendance at meetings with about seven-eighths of visitors being from governments.