California ruling says a Trade Association's rules can function as legal standard.

http://www.lw.com/resource/Publications/_pdf/pub1577_1.pdf

It appears that in the eyes of the California court that associations have the power to finely regulate how its members can ethically compete within the marketplace. Hopefully that kind of thinking will trickle down in regards to licensing legislation and allow us to self-regulate our profession using the government only as a last-ditch arbiter of professional ethics in breaches of criminal code.