If it was me I would go all high-tech and use this for multiple things...
1. Biometric National ID Card with person's important personal information
a. Name, SSN, address, DOB etc
b. Criminal history that can be updated in real time
c. Military history
d. immigration history
e. drivers\insurance\motor vehicle history
In order to buy a gun (private or through FFL), vote, etc all you have to scan the card and it will instantly run a check to see if you are eligible etc etc...