You are absolutely correct on both. As I said before there is no real way to enforce this given the way address changes work in California. It is even simple to say you just moved from another state. Again, impossible to enforce.There are at least two major problems with the radius requirement. One is that it won't do anything to help all the independent hotels and businesses around the theme parks that rely on guests from outside this radius to stay afloat.
The other thing is that there is nothing preventing Californians from going outside their local area and bringing COVID back with them, which makes the entire thing pointless. It almost feels like this is a requirement made to try to discourage parks from opening at all.