Sounds like a direct question “Are there any fees associated with amending a birth certificate?” needs to be asked. Apparently the state is not volunteering any information not directly asked.
It might also be helpful to have a Hawaii native attempt to amend their BC without including any fees to see what happens.
UIPA only cover records requests, not information.
I don’t know the protocol to force them to answer questions. They ARE NOT forthcoming. I suspect there’s unfair pressure on them.