As used in this part, unless the context otherwise requires:
 1. “Area of historical significance” means contiguous pieces of property of no greater area than one hundred sixty acres under diverse ownership which:

 a. Are significant in American history, architecture, archaeology and culture, and
 b. Possess integrity of location, design, setting, materials, skill, feeling and association, and
 c. Are associated with events that have been a significant contribution to the broad patterns of our history, or
 d. Are associated with the lives of persons significant in our past, or
 e. Embody the distinctive characteristics of a type; period; method of construction; represent the work of a master; possess high artistic values; represent a significant and distinguishable entity whose components may lack individual distinction.
 f. Have yielded, or may be likely to yield, information important in prehistory or history.

Terms Used In Iowa Code 15.445

 2. “Commission” is the five-person body, elected by the registered voters in the historical preservation district from persons living in the district for the purpose of administering this part.
 3. “District” means a historical preservation district established under this part.
 4. “Exterior features” means the architectural style, general design and general arrangement of the exterior of a building or other structure, including the kind and texture of the building material and the type and style of all windows, doors, light fixtures, signs and other appurtenant fixtures. In the case of an outdoor advertising sign, “exterior features” means the style, material, size and location of the sign.
 5. “Property owner” means an individual or corporation who is the owner of real estate for taxation purposes.