Any person or other legal entity desiring to import or export ammonium nitrate materials and formulations not conforming to any of the classes listed in this subtitle shall make application to, and secure a permit from the Harbor Engineer to do so. If it is deemed necessary by the Harbor Engineer, a sample of not more than 1,000 pounds of the material in bags as prepared for shipment shall be furnished at least 60 days prior to the intended date of shipment. This sample shall be analyzed by a competent laboratory designated by the Harbor Engineer to determine whether the characteristics of the material require its classification as a dangerous article for purposes of transportation. All costs of such tests shall be borne by the person making application for such permit. City Code, 1966, art. 10, §91(c) 1976/83, art. 10, §91(c) Ord. 58-1651