As used in this chapter, the following terms shall have the meanings indicated:
Any building or structure which is:
Importantly associated with one or more historic persons or events, or with the architectural, cultural, economic or social history of the Borough of Perkasie, County of Bucks, Commonwealth of Pennsylvania, or the United States of America; or
Historically or architecturally important by reason of period, style, method of building construction or association with a particular architect or builder, either by itself or in the context of a group of buildings or structures; or
Listed on the National Register of Historic Places or State Register of Historic Places.