Hey George thanks for replyingThis is a good inquiry for you to pursue. I don't know the answer but it some type of contract to enforce is required & its not present then this is a good defense.
And it would not matter if handicapped, fire lanes, etc ... are involved. Walmart either did grant enforcement rights or the police don't need permission from Walmart or Walmart never gave permission that was needed .. these are the three possibilities as far as an answer to your first ? is. Search out the answers in your state statues. Maybe someone else has more detailed information and will post but its your ticket, I suggest you search.
Yes I've been more or less searching my butt off. I still plan on paying the ticket but like you, I'm curious.