[icehog3]

Originally Posted by California Vehicle Code

26708.5. (a) No person shall place, install, affix, or apply any transparent material upon the windshield, or side or rear windows, of any motor vehicle if the material alters the color or reduces the light transmittance of the windshield or side or rear windows, except as provided in subdivision (b), (c), or (d) of Section 26708.

Originally Posted by subsection b, 10

(10) Sun screening devices meeting the requirements of Section 26708.2 installed on the side windows on either side of the vehicle's front seat, if the driver or a passenger in the front seat has in his or her possession a letter or other document signed by a licensed physician and surgeon certifying that the person must be shaded from the sun due to a medical condition, or has in his or her possession a letter or other document signed by a licensed optometrist certifying that the person must be shaded from the sun due to a visual condition. The devices authorized by this paragraph shall not be used during darkness.

This appears to only permit "removable" screens.

I went through the entire statute on line, and couldn't find anything for California that permitted tinting of most of the windshield or front windows, even with anything from a Doc.