Possession or use of firearms and other dangerous weapons on a Federally owned or leased facility, including grounds, parking lots and buildings, is illegal. 18 USC Section 930 (a) and (b) state:
"Whoever knowingly possesses or causes to be present a firearm or other dangerous weapon in a Federal facility, or attempts to do so, shall be fined under this title or imprisoned not more than 1 year, or both." (Certain exceptions apply. See 18 USC Section 930(c).)
"Whoever with intent that a firearm or other dangerous weapon be used in the commission of a crime, knowingly possesses or causes to be present such firearm or dangerous weapon, in a Federal facility, or attempts to do so, shall be fined under this title or imprisoned not more than five years, or both."
It is important to post signs of the prohibition against weapons at the entrances to Federal buildings. Agency employees should be trained to report suspected violations immediately to a building security official, a supervisor, or other appropriate authority.