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This document covers the design and manufacturing, installation and testing, operation and maintenance for vehicle fuelling appliances (VFAs) - the assemblies of the pressure equipment with - maximum compressor flow rate 20 scm/h, - maximum fuelling pressure 200 bar at 15°C, intended for the non-commercial fuelling of natural gas vehicles (NGVs) with compressed natural gas (CNG). This document is applicable to VFAs supplied with natural gas as defined in local applicable gas composition regulations or EN 16723-2, or with other gases meeting these requirements including biomethane, upgraded coal-bed methane (CBM) and gas from liquefied natural gas (LNG) vaporizer (on-site or off-site). In case of combination of the certified VFA assembly with additional equipment, such as external storage and/or dispenser, EN ISO 16923 applies to the new assembly - the certified VFA assembly with added external equipment. In case of combinations of interconnected VFA assemblies, EN ISO 16923 applies to the whole new assembly of the certified VFA assemblies.