Which feature must be included on the identification card of a defense contractor?

The identification card of a defense contractor must include a photograph of the holder to assist in the verification of identity at various security checkpoints and access controls. This feature is critical because it helps ensure that only authorized personnel gain access to sensitive areas or information, thereby maintaining the integrity and security of operations within the defense sector. A photograph provides a reliable visual reference that can be easily matched to the person presenting the identification card, reducing the risk of unauthorized access.

While other features like distinctive color coding, security clearance level, and expiration dates may also be important in certain contexts or specific organizations, the presence of a photograph is fundamental and widely mandated for identification purposes in security-sensitive environments.