50 USC 1811
50 USC 1811
§ 1811 - Authorization during time of war
CHAPTER 36— FOREIGN INTELLIGENCE SURVEILLANCE › SUBCHAPTER I— ELECTRONIC SURVEILLANCE
Notwithstanding any other law, the President, through the Attorney General, may authorize electronic surveillance without a court order under this subchapter to acquire foreign intelligence information for a period not to exceed fifteen calendar days following a declaration of war by the Congress.