I wouldn't accept this at face value, KMAT. My van has had these plates for 21+ years and we have never had a problem. I believe that's because almost all Handicapped parking spots are at the front of stores, etc.

The biggest problem we have is when those spots are full and we have to park in a regular spot. We then park in the back 40 and inevitably, some AH will park right next to us on the van's cargo door (right) side. We then have to pull back (into the traffic lane of the parking lot) to load my daughter's chair.

We use situational awareness at all times and don't stop/unload in questionable places.
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QMC, USCG (Ret)
The best luck is what you make yourself!