I live in Nashville and I train with a lot of LEO and Corrections officers and our chief Instructor trains the Police Academy here www.eastnashvillemartiarts.com
I'll ask around. In the past the answer I have always gotten is that it isn't cut and dry here. A Screw Driver can be a concealed weapon.
I carry an Emerson Folding Karambit or Applegate Covert. Depending upon how they are adjusted they can be opened with "Gravity"