50 U.S.C. § 426(5) (2010) (Title 50—Chapter 15: National Security--Subchapter D: Protection of Certain National Security Information)
For the purposes of this title [50 U.S.C. §§ 421 et seq.]:
(5) The term "intelligence agency" means the Central Intelligence Agency, a foreign intelligence component of the Department of Defense, or the foreign counterintelligence or foreign counterterrorism components of the Federal Bureau of Investigation.