From my references:
California Electrical Code 2010.
California Code of Regulations Title 24, Part 3.
California Building Standards Commission
Based on 2008 National Electrical Code.
Effective Date January 1, 2011
For three year (triennial) code cycle, 2011 NEC effective date January 1, 2014.
http://www.documents.dgs.ca.gov/bsc/documents/2012/TriennialCycleTimeline-RevisedMaster6-2012.pdf
However, if you need a reference in writing for current bids on long term projects contact:
Building Standards Commission
2525 Natomas Park Drive, Suite 130
Sacramento, CA 95833
Phone: (916) 263-0916
Fax: (916) 263-0959