NIST announces the release of Special Publication (SP) 800-166, Derived PIV Application and Data Model Test Guidelines. SP 800-166 contains the derived test requirements and test assertions for testing the Derived PIV Application and associated Derived PIV data objects. The tests verify the conformance of these artifacts to the technical specifications of SP 800-157, Guidelines for Derived Personal Identity Verification (PIV) Credentials. SP 800-157 specifies standards-based, secure, reliable, interoperable Public Key Infrastructure (PKI)-based identity credentials. SP 800-166 is targeted at vendors of Derived PIV Applications, issuers of Derived PIV Credentials, and entities that will conduct conformance tests on these applications and credentials.