The purpose of this document is to present recommendations for Personal Identity Verification (PIV) card readers in the area of performance and communications characteristics to foster interoperability. This document is not intended to re-state or contradict requirements specifically identified in Federal Information Processing Standard 201 (FIPS 201) or its associated documents. It is intended to augment existing standards to enable agencies to achieve the interoperability goal of Homeland Security Presidential Directive 12 (HSPD-12). The document provides requirements that facilitate interoperability between any card and any reader. Specifically, the recommendations are for end-point cards and readers designed to read end-point cards.