The International Union of Pure and Applied Physics (IUPAP) is an international physics organization that is organized and run by the physics community itself. Its members are identified physics communities in countries or regions around the world.
The IUPAP was established in 1922 in Brussels with 13 Member countries and the first General Assembly was held in 1923 in Paris. It currently has 60 country members.
See here for IUPAP conference policies.
IUPAP-WG14 on Accelerator science
IUPAP Working Group 14 was created in 2015 to promote the exchange of information and views among the members of the international scientific community in the field of Accelerator Science. For more details see https://iupap-wg14.web.cern.ch/.