The geographical pricing model is based on the World Bank GNI per capita Atlas method. Geographical pricing adjustments to the base rate are made in 20% incremental steps for Tier II (80% of base fee), Tier III (60% of base fee), and Tier IV (40% of base fee), respectively. Alternatively, smaller societies or regional interest groups that do not want to join IACA via a larger umbrella society can choose to join as individual societies and pay membership dues based on the number of members in their respective society or special interest group and geographical pricing applies to the calculated base rate at the same 20% incremental steps as outlined above

The World Bank geographical ranking model: Click here