U.S. Food and Drug Administration. (2017). Emergency Use Authorizations of Medical Products and Related Authorities.
This document explains the U.S. Food and Drug Commissioner's authority to issue an Emergency Use Authorization (EUA) for unapproved medical products or unapproved uses of approved medical products during emergencies caused by CBRN threat agents when approved products/uses do not exist. There is also a list of current EUAs, and a link to Frequently Asked Questions about EUAs.