In recognition of those individuals whom the General Assembly, on recommendation from the Council, wishes to honour for their outstanding contribution to the work or reputation of the Association or to the organisation of international congresses in general, shall be invited to be lifetime honorary members.
- Roslyn McLeod (Australia)
- Sarah Storie Pugh (UK)
- Vincent van Wulfen † (The Netherlands)
- Christer Carlsson (Sweden)
- Jorge Castex (Argentina)
- Albert Cronheim † (The Netherlands)
- Ghislaine de Coninck (Belgium)
- Jean Destrée † (Belgium)
- Eric Friis † (Denmark)
- Fay Pannell, OBE † (United Kingdom)
- Maria Grazia Riontino † (Italy)