(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.
(e) Notwithstanding subdivision (a), clear, colorless, and transparent material may be installed, affixed, or applied to the windshield, side, or rear windows of a motor vehicle if the following conditions are met:
(1) The material has a minimum visible light transmittance of 88 percent.
(2) The window glazing with the material applied meets all requirements of Federal Motor Vehicle Safety Standard No. 205 (49 C.F.R. 571.205), including the specified minimum light transmittance of 70 percent and the abrasion resistance of AS–14 glazing, as specified in that federal standard. (3) The material is designed and manufactured to enhance the ability of the existing window glass to block the sun’s harmful ultraviolet A rays.
(4) The driver has in his or her possession, or within the vehicle, a certificate signed by a licensed dermatologist certifying that the person should not be exposed to ultraviolet rays because of a medical condition that necessitates clear, colorless, and transparent film material to be installed on the windshield, side, or rear windows.
(5) If the material described in this subdivision tears or bubbles, or is otherwise worn to prohibit clear vision, it shall be removed or replaced.
Is a letter from a non-US (United States) licensed physician legally valid to use prescription tint windows in California?