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).

Section 302 of title III of Pub. L. 99–508 provided that:

“(a) In General.—Except as provided in subsection (b), this title and the amendments made by this title [enacting this chapter and section 1367 of this title] shall take effect ninety days after the date of the enactment of this Act [Oct. 21, 1986] and shall, in the case of conduct pursuant to a court order or extension, apply only with respect to court orders or extensions made after this title takes effect.

“(b) Special Rule for State Authorizations of Interceptions.—Any pen register or trap and trace device order or installation which would be valid and lawful without regard to the amendments made by this title shall be valid and lawful notwithstanding such amendments if such order or installation occurs during the period beginning on the date such amendments take effect and ending on the earlier of—

“(1) the day before the date of the taking effect of changes in State law required in order to make orders or installations under Federal law as amended by this title; or

“(2) the date two years after the date of the enactment of this Act [Oct. 21, 1986].”