Lots of different facts, dont know whats what.

[s13feen]

I drive an s13 and live in San Diego California. I've asked lots of people these questions and always hear different things, so I was wondering if anyone has the real full scoop. So my questions are.
Can sr20s still pass California smog requirments?
If sr20s pass smog are they legal to have in your car?
If you have a turbo on any motor in California, is it illegal?
If not what are the guidlines and processes you go through to legalize it?
If you receive a ref ticket what are the consequences and prosess you through?
How much is a ref ticket and if you don't pass, do you just pay a fine, or do you get flagged?
What is the California law on exhaust noise, what decible levels?
And where do you get your decible levels tested?

If you guys can help me out by filling me in, and answer these questions I would greatly appretiate it, Thank you.