| UN R110 CNG/LNG System Components | Compressed and Liquefied Natural Gas System Components | Uniform Provisions Concerning the Approval of: I. Specific components of motor vehicles using compressed natural gas (CNG) and/or liquefied natural gas (LNG) in their propulsion system; II. Vehicles with regard to the installation of specific components of an approved type for the use of compressed natural gas (CNG) and/or liquefied natural gas (LNG) in their propulsion system. CNG/LNG System Components Compressed and Liquefied Natural Gas System Components UN Regulation No. 110 UN R110 | UNR | 110 |