Peter,
I understand your concern, but i really doubt that any Law that bans washing your car on your driveway will hold up in court. I've seen too many coin-op car washes, Laundermats, sprinkler runoff, pools, spas, and fountains waist much more water than the average person washing their car on their driveway. I doubt the Governator would even sign such a law, being that he owns such large homes and large cars. Besides, the parts of the article you were citing were simply about some lady being recognized for something she did, meaning its not a LAW.... I'd like to see the whole article if you have a link.
Until they actually show enforcement of this policy, i will continue to wash my car in the same autopian-manner as i have since joining this forum last year. I see NO way they can enforce this, and I forsee many court challenges if they even tried (i'm sure the ACLU would be one of the first). I challenge any sort of "imminent domain" issues that the CA agencies can try and pull on this issue. No sensible judge would up hold the validity of this policy.