Possibly stupid question, but for novel material, why can't you use entry 48 in table 2 of Annex I, which is "descriptive" naming scheme for things outside curr

Possibly stupid question, but for novel material, why can't you use entry 48 in table 2 of Annex I, which is "descriptive" naming scheme for things outside current list? Plus a bunch of the current standard names includes very generic terms. Blends are accepted with the descriptive names.