AB205, also signed by Schwarzenegger, is the guiding principle in this case.
Doesn't AB1400 just build their case nicely, though? Since it was cited in the article, I assumed it was the center of their argument.
I believe AB205 became effective under AS, but was signed right before he took office:
http://www.leginfo.ca.gov/pub/03-04/bill/asm/ab_0201-0250/ab_205_bill_20030922_chaptered.html