There is no 'one law' dealing with ownership of 'wild' or
non-native animals. Every state has different law requirements
and different animals on their lists. As I said, Indiana lists only
these;

1) Wolves which are purebred.

(2) Bears (all species).

(3) Wild cats (all species), excluding except feral cats.

(4) Venomous reptiles.

(5) Crocodilians that are at least five (5) feet long.

I don't care how 'trained' a person is to deal with these exotic
animals, they should not by available for private sale to anyone.

If they are kept at all, it should be by a group wholely dedicated
to caring for them in as natural an enviroment as possible.

ps. For all the ferret lovers, I did find a lot of groups fighting to
legalize ferrets as pets in every state. They are legal in Indiana.