Insurance and swaps.

Californian here.

As long as your car is '74 or older, there's no problem. If I recall correctly, we used to have the emissions exemption roll over each year so that if your car was 30 years old, it was exempt. however, they stopped the roll-over in 2004.

Pssst, it's 1975 AND older. 1976 AND newer need biannual smog inspections.