Alternative-fuel vehicles powered by liquefied petroleum gas (LPG), liquefied natural gas (LNG), or compressed natural gas (CNG) shall be permitted to use the Baltimore Harbor Tunnel and the Fort McHenry Tunnel, if the: Vehicle has a: Dedicated alternative-fuel system installed by the manufacturer of the vehicle, or Fuel system which has been properly converted to an alternative fuel system; Vehicle alternative-fuel system conforms to applicable industry standards, including: NFPA 52—Standard for Compressed Natural Gas (CNG) Vehicular Fuel Systems (1992 Edition)(c), which is incorporated by reference; NFPA 58—Standard for the Storage and Handling of Liquefied Petroleum Gases (1989 Edition)(c), which is incorporated by reference; and NFPA 59A—Standard for the Production, Storage and Handling of Liquefied Natural Gas (LNG) (1985 Edition)(c), which is incorporated by reference; Vehicle alternative-fuel system conforms to applicable federal regulations, including 40 CFR 85, 86, and 600, when adopted by the Environmental Protection Agency pursuant to Notice of Proposed Rule Making, 52 Federal Register 52911 et seq. (November 5, 1992), which is incorporated by reference; and Fuel capacity of the vehicle does not exceed 150 pounds, net weight of fuel. Alternative-fuel vehicles shall display all markings and symbols required by law or regulation to identify the alternative-fuel system.