The part that bugs me, and maybe someone can explain or point me to some authority, is how can US 930 be used to prevent all weapons on gov property? There is a definition of what a "Federal Facility" is just a few paragraphs down at 930 (g)(1):
(g) As used in this section:
(1) The term “Federal facility” means a building or part thereof owned or leased by the Federal Government, where Federal employees are regularly present for the purpose of performing their official duties.
Maybe I'm missing something someplace, but seems a bit odd that an entire paragraph seems to be missing from the interpretation?