The Legislature has prohibited local governments, taxing authorities and state agencies from regulating firearms without lawmakers' approval. It has also expanded citizens' rights to use deadly force, banned law enforcement agencies from keeping databases of gun transactions, shielded from public view the list of concealed-weapons owners and given gun owners the right to take firearms to workplace parking lots as long as the weapons are stored in locked cars. Last year, Florida was among 12 states that supported the challenge of the District of Columbia's strict handgun ban.