because california uses a different model than the rest of the united states. Its more agressive because of the natural and point sources of emissions as well as the mobil point sources. We need a more agressive air model otherwise we would all have breathing problems. Look at LA, and look at san diego that shit is on fire like once a year.
Also there is no reason to go to bar unless you have a ticket, and if you have a ticket there are more important things to worry about than having a sticker on an intake. Actually i think my friend passed with one on his whale dick. Times are changing, for instance B20 swaps are legal now. Well...i dont know about for you but for me they are.