Fortunately, here in Oregon, the code is relatively open:
"(2) A rearview mirror or device only
meets the requirements of this section if it
enables the driver of the vehicle to have
such a clear and unobstructed view of the
rear at all times and under all conditions of
load as will enable the driver to see any
other vehicle approaching from not less than
200 feet in the rear on an unobstructed road."
I can't reliably measure how much of an impact it has had on my i3 to remove the exterior mirrors without driving 1000s of miles, but aside from an absurdly wide 110 degree view on each side, the camera pods I installed work well for me. They eliminate the blind spots of the interior BS mirrors, and stupidity would be my only excuse for curb rash or cutting in front of a bicyclist now.
I have the STL for the fender mounted camera housings posted
here.