Category Archives: Online Supplement

The NSA’s New SIGINT Annex

Previously been published in Lawfare (Jan. 15, 2021), in this paper David Kris reviews new National Security Agency guidance designed to regulate signals intelligence (SIGINT) activity that implicates US persons’ privacy and the Fourth Amendment. Officially an annex to the manual of rules governing all DOD elements—DOD Manual 5240.01—the new “SIGINT Annex” replaces the prior NSA annex, last significantly updated in 1988.

This paper reviews and analyzes the new SIGINT Annex, reading it in context with the Raw SIGINT Guidelines, the PPD-28 Procedures, and the current version of USSID-18, occasionally comparing it to the DOD Manual, the Prior Annex, and a corresponding set of internal procedures issued in 2017 by the Central Intelligence Agency.