ISO 12619-2:2014 specifies performance and general test methods for compressed gaseous hydrogen (CGH2) and hydrogen/natural gas blends fuel system components, intended for use on the types of motor vehicles defined in ISO 3833. This part of ISO 12619-2:2014 is applicable to vehicles using CGH2 in accordance with ISO 14687‑1 or ISO 14687‑2 and hydrogen/natural gas blends using natural gas in accordance with ISO 15403‑1 and ISO/TR 15403‑2. It is not applicable to the following: -liquefied hydrogen (LH2) fuel system components; -fuel containers; -stationary gas engines; -container mounting hardware; -electronic fuel management; -refuelling receptacles.