The limits of the "H" Historic District shall be those lands, buildings, objects, or works of art designated as a listed property or a historic district by the City of Steubenville pursuant to the provisions of this chapter. This district shall be deemed an overlay on any base zoning district now or hereafter applicable to any lot. Should the "H" Historic District be declared inapplicable to any lands, buildings, objects, or works of art by action of the City or any court of competent jurisdiction as provided for in section 1177.09 herein, the zoning of such lands, buildings, objects, or works of art shall be deemed to be the base district in which it is located without consideration of this chapter. It shall be unlawful for any construction, subdivision or development of land to be undertaken in this district unless all appropriate permits and approvals have been obtained.