NIST Defines Standards for Biometric Federal ID Cards

The National Institute for Whatever has defined standards for Federal ID cards, "Personal Identity Verification cards" for all federal employees and contractors. These cards will have biometric ID in the form of two fingerprints. The standard also defines how to add face prints. I don't suppose real ID cards will be required to follow this standard. Why have ANY of the passport, federal ID and Real ID cards be the same to cut costs?

On the other hand, maybe the DHS will require Real ID cards to follow this same standard. Interestingly, the letters RFID do not appear in the NIST document.