Talk about irony. The most shocking new wrinkle in the FBI proposal has to do with shutting down gun sales nationally from time to time. The proposed regulations are clear that if any system fails to respond the sale will be delayed. In other words, if any system is down, no retail sales will be possible across the board. The day of the sale isn't counted.
Holidays extend the delay.
The FBI determines which computer systems will be linked, and is encouraging various agencies to get the interface specs and consider participating. Information in the NCIC and III systems that will be searched during a background check will be contributed voluntarily by Federal, state, local, and international criminal justice agencies. When combined with the rule that any data hit triggers at least a review, possibly a delay and based on a single person's evaluation a denial, this amounts to extra-national control of the criminal justice system. A nation could presumably load a set of names, identify the individuals as felons, and deny them their rights. The proposal makes it clear that the contributing agencies, not NICS operators, are responsible for accuracy.