From the Federal perspective (the National Register of Historic Places is part of the National Park Service), a property owner can do whatever they want with their property as long as there are no Federal monies attached to the property.
I think you probably mean the metaphor of piercing eyes, it means someone who has a really intense look in their eyes. Sometimes it could be that the colour of their eyes is quite different, like a really icy blue colour. piercing eyes are eyes that can see straight through a person. SUPP is right.
Tiger Eye (Cat's Eye, Falcon's Eye or Hawk's Eye) gemstone meaning. Tiger Eye lets you see everything. Use it for insight and you can be a very lucky person. When used in jewelry the tiger eye may bring good luck and protection from the evil eye to the wearer. It also known to bring clear thinking and insight.