California

Source for what information?

The OP and the link within state it is a "one time" tax. That would appear to mean it can never be imposed again, even on a new batch of billionaires 5 years from now. Why?

As far as determining how much total wealth people have, how else would you determine it if the government doesn't assess it? Total wealth includes everything someone owns including real estate, houses, cars, businesses, jewelry, art, investments, collectables, furniture, appliances and other household items, and pretty much everything else.

First off, the government would need to determine who is eligible or not. Does someone have $1 million, $100 million, $900 million or $1 billion or more? Then for those with over a billion, they need to determine the exact total value of all their wealth. How? Currently, all they know is the value of real estate for property taxes and also reported income. They would have to determine the value of everything else.

Just asking if the proposal addresses how that would be administered and what methods they would use? Seems really difficult without going door to door and examining and evaluating all possessions. If you have heard a different explanation on exactly how that would be implemented, I would love to hear it.