One also cannot legally bring rat poison into California, as I believe most people working in the Los Angeles County City Hall now know, from their hospital beds near the palm trees, since many came down with Cholera and other medieval stuff.
In many parts of Calif, the simple, routine act of clearing brush away from your home is illegal.
In remote, arid areas far from fire departments, places that have high risk of seasonal fires?
YES.
Not just your yard but in some cases dry brush physically abutting the walls of your home.
There was a yuge fire at Lake Tahoe (pittoresqu ski/casino place) 5 years ago and many homes burned owing to the enforcement militance of the TRPA, the Tahoe Regional Planning Agency.
It was illegal to clear the brush away.