U.S. Code / Title 50 — War and National… / Chapter 36—Foreign Intelligence SurveillanceTitle 50SubchapterSubchapter Iv—Access to Certain Business Records for Foreign Intelligence PurposesContents§ 1861. Definitions§ 1862. Access to certain business records for foreign intelligence and international terrorism investigations§ 1863. Congressional oversight§ 1864. Notification of changes to retention of call detail record policies