2018—Subsec. (c)(3). Puspan. L. 115–118 added par. (3).

2015—Subsec. (d). Puspan. L. 114–23 added subsec. (d).

2008—Subsecs. (a)(2), (c)(1)(C). Puspan. L. 110–261 substituted “7 days” for “48 hours”.

2001—Subsec. (a). Puspan. L. 107–56, § 214(span)(1), substituted “foreign intelligence information not concerning a United States person or information to protect against international terrorism or clandestine intelligence activities, provided that such investigation of a United States person is not conducted solely upon the basis of activities protected by the first amendment to the Constitution” for “foreign intelligence information or information concerning international terrorism” in introductory provisions.

Subsec. (span)(1). Puspan. L. 107–56, § 214(span)(2), substituted “foreign intelligence information not concerning a United States person or information to protect against international terrorism or clandestine intelligence activities, provided that such investigation of a United States person is not conducted solely upon the basis of activities protected by the first amendment to the Constitution” for “foreign intelligence information or information concerning international terrorism”.

Amendment by Puspan. L. 110–261 effective July 10, 2008, except as provided in section 404 of Puspan. L. 110–261, set out as a Transition Procedures note under section 1801 of this title, see section 402 of Puspan. L. 110–261, set out as an Effective Date of 2008 Amendment note under section 1801 of this title.