parking in Amman

I had an argument the other evening on Jebel Amman about parking my car outside a restaurant. The valets said I could not park there but I just said call the police and left my car. Of course they could not do anything about it. But just to make sure I was in the right I asked the police what is the law on this. Do shops, restaurants, offices etc have the right to put notices on the streets and stop people from parking? He said THEY DO NOT HAVE THE RIGHT. T