I'm sure glad you guys posted this, because I'm traveling to CA for the first time later in the year, with my Garmin GPS, and I had no idea that there were any sort of restrictions on windshield mounts. I typically put my GPS on the center of the windshield, low down, close to the dash, so it doesn't obstruct my view.
Thanks for the link to the code, Zarf. I will be sure to print it out with my other travel docs prior to my trip.