Bmw Licence Plate Mount Vehicle With One Licence Plate Spot? Do I Need To Have Two?

Vehicle with one licence plate spot? Do I need to have two? - bmw licence plate mount

I have a new edition 2007 BMW 328i and the DMV gave me two plates, but the vehicles have no place in the division plate on the front, and I have vehicles that seen with a single plate motion. By California law that I have two hard drives, but there are exceptions to this rule?