Regular Membership - Category A - Domestic and some International Countries: 

Australia, Austria, Bermuda, British Virgin Islands, Brunei, Canada, Cayman Islands, Falkland Islands, (Islas Malvinas), Gibraltar, Guernsey, Hong Kong, Iceland, Ireland, Isle of Man, Jersey, Kuwait, Liechtenstein, Luxembourg, Macau, Monaco, Netherlands, Norway, Qatar, Singapore, Sweden, Switzerland, United States

Emeritus Membership - Category A - Domestic and some International Countries: 

Australia, Austria, Bermuda, British Virgin Islands, Brunei, Canada, Cayman Islands, Falkland Islands, (Islas Malvinas), Gibraltar, Guernsey, Hong Kong, Iceland, Ireland, Isle of Man, Jersey, Kuwait, Liechtenstein, Luxembourg, Macau, Monaco, Netherlands, Norway, Qatar, Singapore, Sweden, Switzerland, United States

Regular Membership - Category B - International Countries:

Andorra, The Bahamas, Bahrain, Belgium, Denmark, European Union, Faroe Islands, Finland, France, Germany, Greenland, Guam, Israel, Italy, Japan, Korea, South, Malta, New Caledonia, New Zealand, Oman, Saint Pierre and Miquelon, Saudi Arabia, Slovenia, Spain, Taiwan, Turks and Caicos Islands, United Arab Emirates, United Kingdom

Emeritus Membership - Category B - International Countries:

Andorra, The Bahamas, Bahrain, Belgium, Denmark, European Union, Faroe Islands, Finland, France, Germany, Greenland, Guam, Israel, Italy, Japan, Korea, South, Malta, New Caledonia, New Zealand, Oman, Saint Pierre and Miquelon, Saudi Arabia, Slovenia, Spain, Taiwan, Turks and Caicos Islands, United Arab Emirates, United Kingdom

Regular Membership Category C - Countries in the Less than 50th Percentile GDP per Capita

See Membership Rates Chart

Emeritus Membership Category C - Countries in the Less than 50th Percentile GDP per Capita

See Membership Rates Chart

Student Membership - Category A - Domestic and some International Countries: 

Australia, Austria, Bermuda, British Virgin Islands, Brunei, Canada, Cayman Islands, Falkland Islands, (Islas Malvinas), Gibraltar, Guernsey, Hong Kong, Iceland, Ireland, Isle of Man, Jersey, Kuwait, Liechtenstein, Luxembourg, Macau, Monaco, Netherlands, Norway, Qatar, Singapore, Sweden, Switzerland, United States

Student Membership - Category B - International Countries:

Andorra, The Bahamas, Bahrain, Belgium, Denmark, European Union, Faroe Islands, Finland, France, Germany, Greenland, Guam, Israel, Italy, Japan, Korea, South, Malta, New Caledonia, New Zealand, Oman, Saint Pierre and Miquelon, Saudi Arabia, Slovenia, Spain, Taiwan, Turks and Caicos Islands, United Arab Emirates, United Kingdom

Student Membership Category C - Countries in the Less than 50th Percentile GDP per Capita

See Membership Rates Chart