I read their FAQ. It's pretty obvious to me that CARB is going to break or at least substantially degrade E911 service:
Will my GPS still work?
for aftermarket GPS devices, deletion windows, or areas without reflective coatings, will be created in the windshield and the location of these windows noted in the owner's manual. ARB tests showed that placing the GPS device or the external antenna within the deletion window allows the device to operate as effectively as in a car with no reflective glass.
Will E911 service on my cell phone be compromised by reflective glass?
E911 uses a combination of cell phone and GPS technology to direct emergency personnel to your location. Although ARB staff did not test E911 technology directly, cell phone and GPS navigation technology were tested separately and found to work in vehicles with reflective glass. As a result, staff does not expect E911 to be adversely affected by the Cool Cars regulation.
So, E911 will work if I hold my phone up to the deletion window? That sounds great for emergency situations, say after a car crash. After an accident people are in shock so they are not going to think about holding their phone up to a deletion window so 911 knows where they are, that is if they are even able.
Is it too much to ask that CARB actually test E911? They tested cell phone use on one vehicle with wrap around reflective glass so it is absurd to say the know the impact of reflective glass on vehicles since there are many types of vehicles they did not test.
CARB should be be sued in federal court for interfering with FCC mandates for E911.