(a)   In the designation of buildings, structures and objects as historic districts certain criteria must be met. The historic resources within the historic district must be fifty (50) or more years old. In addition, the historic resources must meet one (1) or more of the following criteria:

(1)   Are associated with events that have made a significant contribution to the broad pattern of history of the city, county, state or nation;

(2)   Are associated with a significant person or group of persons in the history of the city, county, state or nation;

(3)   Embody distinctive characteristics of a type, period, method of construction; represent the work of a master builder/architect; possess high artistic values; or represent a distinguishable entity whose components may lack individual distinction;

(4)   Yield or are likely to yield information in prehistory or history; or

(5)   Possess integrity of location, design, settings, materials and workmanship.

(b)   The boundaries of historic districts shall be drawn so as to include all buildings, structures, sites, objects or land areas which meet one (1) or more of the criteria set out herein or which directly affect or relate to such buildings, structures, sites, objects or land areas meeting one (1) or more of the above criteria, provided that at least seventy-five (75) percent of the total structures within the boundaries are of architectural, historical, archaeological, or cultural importance or value as determined by the Haysville Historic Committee.