For the purpose of this article, the Dillon Historic Designations of Commercial Districts, Residential Districts, Neighborhoods, notable properties and properties listed on the National Register of Historic Places are hereby established and are governed by the Historic Overlay Ordinance. The boundaries of the districts, neighborhoods, notable properties and National Register sites shall be designated on the Official Zoning Map of the City of Dillon. All Dillon Historic Designations are subject to standards, guidelines and procedures as set forth herein.