18 U.S. Code § 3121 - General prohibition on pen register and trap and trace device use; exception
The Foreign Intelligence Surveillance Act of 1978, referred to in subsec. (a), is Pub. L. 95–511, Oct. 25, 1978, 92 Stat. 1783, as amended, which is classified principally to chapter 36 (§ 1801 et seq.) of Title 50, War and National Defense. For complete classification of this Act to the Code, see Short Title note set out under section 1801 of Title 50 and Tables.
2001—Subsec. (c). Pub. L. 107–56 inserted “or trap and trace device” after “pen register” and “, routing, addressing,” after “dialing” and substituted “the processing and transmitting of wire or electronic communications so as not to include the contents of any wire or electronic communications” for “call processing”.
1994—Subsecs. (c), (d). Pub. L. 103–414 added subsec. (c) and redesignated former subsec. (c) as (d).