ISAR wants to welcome members from all around the world. For those categories of membership requiring an annual fee- this shall be subdivided according to primary place of residence and work in to: Category A- High and high-middle income countries and Category B- Low middle and low income countries as classified by the World Bank Group (https://datatopics.worldbank.org/world-development-indicators/the-world-by-income-and-region.html). If individuals change place of residence they may apply to the committee for a change of subcategory. If a countries economic status changes the subcategory will change accordingly.