Thanks very much for clarifying that point, which had seemed quite odd to me. Considering the administrative costs involved, I thought it would be a money-losing proposition to be pulling people over for a $20. fine.
I am sure there will be stories about the first tickets issued.
It will definitely be an entertaining circus to watch.
http://www.dmv.ca.gov/cellularphonelaws/index.htm here is the CA rundown...
of note, text messaging is still legal for adults, and no phone or texting under 18.