Emergency restrain orders could be another reason for the exception.
Would this be the same ERPO process often touted as a solution to unhinged individuals going on a rampage that almost never works due to the current slow process, general unawareness, and issues with restoration of rights?
Try justifying the waiting period rather than creating some Rube Goldberg machine of negligible value.
Should be added to the law. If for whatever reason that gun that was legal and becomes illegal, government should pay double the retail price when bought to the owner. If over turned, there should be a automatic availability to buy the firearm with no waiting period for the person that previously had it.
You seem to miss that California has a rich and established history of using SLAP lawsuits and sandbag legislation specifically intended to require lengthy federal appeal and judgment to resolve, always with the next legislative measure ready to go no matter how unconditional.
You seem to believe such states are operating in good faith - they’re not. Your suggestion only works if they are.
Additionally, the state still has information it shouldn’t regarding civilians and ownersgip of firearms and has already demonstrated incompetence with such information resulting in leaks.
I can respect the brainstorming, but the answer truly is to simply address the underlying issues behind individuals and the myriad pressures toward violence.