32 CFR 1903.10: Weapons.

(a) Except as provided in paragraph (c) of this section, knowingly possessing or causing to be present a weapon on an Agency installation, or attempting to do so is prohibited.

(b) Knowingly possessing or causing to be present a weapon on an Agency installation, incident to hunting or other lawful purposes is prohibited.

(c) This section does not apply:

(1) To any person who has received authorization from the CIA Director of Security, or from his or her designee, to possess, carry, transport, or use a weapon in support of the Agency's mission or for other lawful purposes as determined by the CIA Director of Security; or

(2) To the lawful performance of official duties by an officer, agent, or employee of the United States, a State, or a political subdivision thereof, who is authorized by law to engage in or supervise the prevention, detection, investigation, or prosecution of any violation of law.