This IHCO Industrial Heritage Corridor Overlay District shall be an overlay district applicable only to the HI Heavy Industrial District, LI Light Industrial District, and PCO Planned Commercial/Office District. Requirements or applicable provisions identified within these underlying zoning districts apply to the IHCO District when this Article XIIA omits or does not reference the requirements. In cases where there is a conflict between the requirements of the IHCO District and the underlying zone, the requirements of the IHCO District shall apply.