Semi-automatic weapons include practically every rifle and handgun that's more than single-shot but less than a machine gun. That's practically most weapons used for defense and hunting and collection.
Only if you leave out all of the handguns sold as revolvers, shotguns that are pump-action or break-action (breech loading), bolt-action and lever-action rifles. Yeah, except for all of
those guns that are "used for defense and hunting and collection".
Saying it's "ultimately unclear" does not give confidence to gun owners that he wouldn't "pull the trigger" on it and charge existing owners the $200.
That would be among the things worked out in the legislative process as the article stated. Under the NFA, the tax is on transfers.
"The NFA was amended in 1968 to provide a 30-day amnesty period in which unregistered firearms could be registered with the federal government for free. The new law, titled the Gun Control Act, also says ATF can issue new amnesty periods of up to 90 days.
Those kinds of amnesty periods could also apply to Biden’s proposal."
Not nearly as vague as your gossipy rumor "In the meanwhile, Biden wants to add a "tax" on weapons. I heard $200 per weapon."