In 1991, I took my '89 Escort from NJ to CA and had to pay CA a few hundred dollars for the privilege as, it not having been mfg'd in CA, its emissions system was suspect. When I took it to inspection as a prelude to registering it, I asked the tester if the car met CA's emission standards. It did. What was the point to my having to pay the "entry fee", then?
Because they could make me. He chuckled when he said it. And then he berated me for never having had the timing checked. He "knew" that was so because the socket for the computer test plug had electrical tape over it to keep it dirt-free, which is the way it comes from the mfg.
What he didn't know was that both times my father checked the timing, he replaced the tape.