The word "understanding" is simpler to define than the word "quiet". The word "understanding" represents a recognition of the needs of the people who go into a park and of the activities that take place there. The activities there must be understood, and so must the needs of the visitors. Those are quite straightforward requirements, and that is what the Government seek to provide—an opportunity for people outside to understand what goes on, and an opportunity for people within the parks to help to provide understanding and to receive understanding. They need that. They need their livestock to he protected.