Knife and Licensed Weapons Preemption

You have your Florida Concealed Weapon or Firearm License (CWFL) and you know that Florida preempts all firearms laws throughout the state so that you don’t accidentally break some ridiculous local ordinance and end up in the hoosegow for carrying your  weapon.  You have a license from the state and we fought hard to make preemption enforceable last legislative session!

Well, you are half right.  Your pistol won’t get you in trouble but your pocket knife could put you away for a MINIMUM of six months, cost you a cool grand, and yeah… they’ll take your knife too.

But wait!  I have a license from the state to carry that!  Yep you do, but not from the County and your assisted opening pocket knife just violated their laws.  There's no preemption to help you.  Yet...