(legal term) In October 1994, the United States Congress acted to protect public safety and national security by enacting the Communications Assistance for Law Enforcement Act (CALEA). CALEA also spoke to the legal obligations of telecommunications carriers to help law enforcement conduct electronic surveillance when ordered to do so by the courts. CALEA also requires carriers to either design or adapt their systems to make sure that court-ordered electronic surveillance could be performed. Communications Assistance for Law Enforcement Act (CALEA). Communications Assistance for Law Enforcement Act. [Online, May 8, 2004.] CALEA Website. http://www.askcalea.com/faqs.html#04.