From my understanding, cutting plates is not allowed in Texas either. I ended up mounting it the same way as the other cars... on TOP of the chrome trim strip. It looks just fine.
I tried the chrome surround route but it looked a bit too busy. I now have just the plate mounted, without any framing.
I once saw a pagoda with the plate mounted hanging below the trim strip... made me nervous given how low these cars are... nice way to damage the rear valence panel if you go up a steep driveway....
Waqas in Austin, Texas