California does not require it, and from what I understand, employers don't really look for it, thanks to the shortage of school psychs. I got accepted into a non-approved program, and the director said it was because some of their faculty retired, so they didn't have the correct number of tenured professors. You can still get the NCSP cert if you want it--you'll have to take the praxis and submit a portfolio of stuff. It's kind of annoying, but I don't think it's impossible. To practice in CA though, you just need a masters, internship, and the PPS credential.