Surprised your Dad got ticketed here. A warden could sit in the bushes and get a shedload of tickets here.
Anyway, i am not condoning the practice but to check out your rights and basis of appeals have a look at this website. It is excellent with some very knowledgable people posting.http://forums.pepipoo.com/
Ask your question on that forum and you will have a better understanding of things.
As others have said those lines look unenforcable.
P.S. used to be the entrance to Spectrum printing.