The following classes of hazardous materials are defined in the United States Department of Transportation Regulations, 49 CFR 173, which is incorporated by reference: Terms Defined. “Authority property” means the following facilities and their approaches: Baltimore Harbor Tunnel (I-895); William Preston Lane, Jr. Memorial Bridge (U.S. 50/301); Harry W. Nice Memorial Bridge (U.S. Route 301); Thomas J. Hatem Memorial Bridge (U.S. Route 40); Francis Scott Key Bridge (MD 695); John F. Kennedy Memorial Highway (I-95); The I-95 Fort McHenry Tunnel (I-95); and The InterCounty Connector (MD 200). "Container" means a package or receptacle used to contain hazardous materials for transportation, including a box, bottle, can, drum, barrel, cylinder, carboy, or other shipping package, other than a tank vehicle or bulk packaging, used for the transportation of hazardous materials. “Flash point” means the minimum temperature at which a substance gives off flammable vapors which in contact with spark or flame will ignite. “Gross weight” means the total weight of a container and its contents. “Hazardous material” means a substance or material, including a hazardous substance, which has been determined by the Secretary of Transportation for the United States Department of Transportation (U.S.D.O.T.) to be capable of posing an unreasonable risk to health, safety, and property when transported in commerce and which has been so designated. “Hazardous substance” means a material, including its mixtures and solutions, that is listed in the Appendix to 49 CFR §172.101, which is incorporated by reference. This definition does not apply to petroleum products that are lubricants or fuels. “N.O.S.” means not otherwise specified. “Net weight” means the weight of the contents of a container only. “Shipping paper” means a manifest, memorandum receipt, bill of lading, shipping order, or other document describing material to be transported. “Tank vehicle” means any vehicle with a cargo tank, portable tank, bulk pyramided cylinders, or tube trailer used for the transportation of liquids or gases.