Laws are inherently restrictive in the sense that things which aren’t prohibited by law, are permissible. So a law which codifies that something is permissible is useful for clarity, but it doesn’t really release citizens of restrictions.
So the law defining it as 8’ just gave everyone 17’ feet of freedom.
Also state laws can legalize something that was federally illegal, sort of. See marijuana legalization. (This is really technical and rests on the commerce clause and is debatable, but what’s not debatable is people can now open up a shop and sell weed without ending up in a federal prison whereas before they could not, so freedom has increased.)
A law, but not this law, which explicitly does not grant any right.
At nine feet away, this law has no bearing and the earlier precedent should still apply.