; (B) the Department of Justice; (C) the Department of Homeland Security; (D) the Nuclear Regulatory Commission; (E) the United States Capitol Police; (F) the Bureau of Diplomatic Security; (G) the Central Intelligence Agency; and (H) the military departments (as defined in section 102 of title 5, United States Code). (2) Firearm The term firearm has the meaning given that term in section 5845(a) of the Internal Revenue Code of 1986, but does not include a silencer (as defined in section 921 of title 18, United States Code). 3. Removal of law enforcement powers of inspector general agents (a) In general Section 6 of the Inspector General Act of 1978 (5 U.S.C. App.) is amended— (1) by striking subsection (e); and (2) by redesignating subsection (f) as subsection (e). (b) Effective date Subsection (a) shall take effect on the date of the enactment of this Act.