If the blade has only one sharpened edge, it's good to go. If a knife can be opened by gravity or centrifugal force, it is defined as illegal, but I have never heard of anyone being arrested for carrying a locking-blade knife that could be flipped open. I suppose it could happen. Balisongs are illegal in Texas because they can be opened with centrifugal force, but balisongs have no spring which must be overcome to flip the blade open. Most locking blades do have some tension on the blade, which IMHO is what keeps them legal in Texas.