47 U.S.C. § 1004
Systems security and integrity
A telecommunications carrier shall ensure that any interception of communications or access to call-identifying information effected within its switching premises can be activated only in accordance with a court order or other lawful authorization and with the affirmative intervention of an individual officer or employee of the carrier acting in accordance with regulations prescribed by the Commission.
( Pub. L. 103–414, title I, § 105 , Oct. 25, 1994 , 108 Stat. 4283 .)