International Aroid Society (IAS) is the International Cultivar Registration Authority (ICRA) appointed by the International Society for Horticultural Science (ISHS).
As an ICRA, we would follow the International Code of Nomenclature for Cultivated Plants (ICNCP) in the recording and maintenance of cultivar records for the Araceae family (except for Calla L. & Zantedeschia Spreng. genera).
You can read more about ICRAs here: https://www.ishs.org/nomenclature-and-cultivar-registration/icra
ICRA Entry with ISHS: https://www.ishs.org/sci/icralist/32.htm
Registering cultivars ensures consistency in understanding origins and defining characteristics of a specific cultivar while preserving the information for posterity. A centralized and standardized approach ensures our community practices are consistent with the ICNCP and keeps the cultivars valid.
Note that the registration with ICRA does not provide any legal protection to the grower nor does it endorse the quality of a cultivar. It serves only as a source of information for the community and ensures compliance with ICNCP for the grower.