Earlier quoted context omitted.
Yeah there are a lot of very obscure legal rules that most people aren't aware of or haven't been enforced in many years. Not from as far back but my house was built in the early 1980's and my house deeds include the stipulation that I must maintain a garage attached to the property (so I can't convert it to extra living space) because the local government retain the right to convert the space into a decontamination…
The wild thing is we still have thousands of nuclear weapons, and the number of nuclear-armed states has grown since then. We just perceive a lower risk now-a-days, which I hope holds up.
More nations have weapons but the numbers weapons they have is very low and the ability to hit the US doesn't exist for the rogue nations.