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.
A piercing is a piercing is a piercing. It breaks the skin. It's going to hurt. But it's not agonizing. It's pretty much similar to a regular nose piercing, Tiny Tatz said. Tiny Tatz noted that it's tough to do from a piercers perspective, since there is a certain area where you they have to go under the cartilage.