Yes, however you can not carry it with you, concealed or otherwise in public.
butterfly knives are legal but they must be under 3.5 inches. Balisong trainers are legal however.
Balisong knives, also called butterfly knives, are legal in Illinois.
Yes
yes
no butterfly knives are legal in nc i just wouldn't carry one around anywhere
NO! they are a prohibited weapon
If you have a flying liscense.
Butterfly knives are illegal only if you are carrying them with intent to harm. It is legal for you to own them and keep them at home--for collection. You can also get a trainer, this is legal to carry.
yes it is i think
No they are still illegal in Washington
Yes they are
they are legal but its illegal to carry or show it on public