I'm not sure about the others but the CEC is basically the NEC 2 years back with some special exceptions that mostly appear to allow California to amend what it does in its own buildings.

2007 CEC = 2005 NEC.
2010 CEC will be 2008 NEC

My framing buddies tell me they are adobpting the IBC in CA but I don't know if that happened yet.

And of course the energy code is in place to keep you spending hours explaining why you can't install what people want you to.

The CEC online for free:

http://ia311343.us.archive.org/3/items/gov.ca.bsc.title24.part03/title24_part03.pdf


The energy section:

http://www.energy.ca.gov/title24/


They were supposed to adopt the 2009 standards for section 6 on 9/1/2009 but it appears they have extended it to 1/1/2010.

Go figure. CA put a standard in place before everyone was ready and needed to extend the time frame.....again.