| Principal Members | Associate Members |
 FranceJérôme Dyment |
 CanadaSteve Scott |
 GermanyColin Devey |
|
 JapanKyoko Okino |
|
 United KingdomTim Henstock |
|
 United StatesDonna Blackman |
|
 ChinaJohn Chen |
|
India
Korea
Norway
Portugal
Spain| Corresponding Members | |
 AustraliaDietmar Müller |
|
 AustriaMonika Bright |
 MoroccoJamal Auajjar |
 BrazilSuzanna Sichel |
 New ZealandIan Wright |
 ChileJuan Diaz-Naveas and Luis Lara |
 PhilippinesGraciano P Yumul, Jr. |
| Chinese Taipei Saulwood Lin |
 RussiaSergei A. Silantyev |
 Denmark |
SOPAC Russell Howorth |
 South AfricaPetrus le Roux |
|
|
|
 SwedenNils G. Holm |
|
|
 SwitzerlandGretchen Früh-Green |
Mexico
Iceland
Italy
Mauritius
