What is the responsibility of the breeder or seller to be knowledgeable about all the laws on owning snakes (ie, large boids, ball pythons, etc) when selling to someone? Are they liable if they ship to a location that has a ban on them? Or is the snake owner the one who is held liable if they decide to own when they live in an area where there is a ban?

I've been wondering this and meaning to ask this for some time.