Individual, Collective and Honorary. Members (475) in 52 countries and territories:
• Kenya, Niger, South Africa, Tunisia.
• Argentina, Brazil, Canada, Jamaica, Martinique*, Mexico, Nicaragua, Paraguay, Puerto Rico*, United States of America, Venezuela (Bolivarian Republic of).
• China, Israel, Japan, Republic of Korea, Kyrgyzstan, Taiwan/China.
• Australia, New Zealand.
• Austria, Belgium, Bosnia and Herzegovina, Croatia, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, The former Yugoslav Republic of Macedonia, Netherlands, Norway, Poland, Portugal, Romania, Russian Federation, Serbia, Slovakia, Spain, Sweden, Switzerland, Turkey, United Kingdom of Great Britain and Northern Ireland.