Xo' -
Who says your Ball Python is an exotic?
Do your local, county or state laws specify that Squamata Boidae or Pythonidae are exotic? If so, under what guidelines?
Our city law states that Squamata Boidae which also represents pythons as a sub-family, are considered exotic only for those species whose adult length has the potential to exceed eight feet in length. That pretty much excludes Balls, ehhh?
Not saying that your laws will read as ours but certainly worth a look. I would find it incredulous to require permit and liability for Balls.