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.
Glassy Eyes Causes and Cures. Synopsis: Glassy eyes can be defined as a fixed staring and wide eyed appearance with the eyes appearing to be glazed or shiny. Main Document. What are glassy eyes- The term generally refers to an appearance of listlessness in which the eyes are unfocused and without lustre.