Amendments to the Foreign Intelligence Surveillance Act (FISA) Expiring on December 15, 2019 [Updated April 11, 2016] [open pdf - 912KB]
From the Summary: "In summer 2013, media began reporting on several foreign intelligence activities conducted by the National Security Agency (NSA), including the bulk collection of telephone metadata under Section 215 of the USA PATRIOT Act. After a one-day lapse in the expiring authorities, Congress enacted the USA FREEDOM Act, which placed new limitations on the scope of the government's foreign intelligence activities, while simultaneously extending the expired provisions through December 15, 2019. Although these provisions are set to sunset at the end of 2019, grandfather clauses permit them to remain effective with respect to investigations that began, or potential offenses that took place, before the sunset date."
CRS Report for Congress, R40138
Congressional Research Service: https://crsreports.congress.gov/