Short answers, pulled from the story.
The International Union of Pure and Applied Physics was established in 1922 when thirteen nations gathered in Brussels to form the organization. This new body emerged from the ashes of World War I to coordinate international efforts in physics.
Thirteen founding nations including Belgium, Canada, Denmark, France, Netherlands, Empire of Japan, Norway, Poland, Spain, Switzerland, United Kingdom, United States, and South Africa joined the International Union of Pure and Applied Physics in 1922. Sir William Henry Bragg served as the first President from 1922 until 1931 leading the newly formed Executive Council.
The General Assembly meets every three years to govern the direction of the International Union of Pure and Applied Physics and elect leadership positions. Sixty Members currently adhere to this body with each represented by Liaison Committees within their respective nations.
Type A General Conferences provide broad overviews with attendance expected between 750 and 1000 participants while Type B Topical Conferences concentrate on sub-fields with 300 to 600 attendees anticipated. Type C Special Conferences focus on specialized topics such as angular correlations or neutron resonance studies and Type D Workshops in Developing Countries address regional needs without requiring full international participation.
Michel Spiro currently serves as the president of the International Union of Pure and Applied Physics starting in 2025 with Silvina Ponce Dawson following next term. Each president is elected by the General Assembly after being chosen as President-Designate during previous elections.