Each title heading is clickable - clicking each title will expand/collapse the list of standards & supporting documents.
Foundational publications are earlier work (NIST Interagency Reports - NISTIR) that demonstrated various capabilities of PIV card/system. Many of the concepts/outcomes in these NISTIRs are reflected in the current version of the PIV Standard and/or associated Special Publications.
Security and Privacy: Personal Identity Verification
Laws and Regulations: Homeland Security Presidential Directive 12